RU2465948C2 - Bag filter for three-stage air cleaning of impurities - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: invention relates to bag filter intended for aspiration air. Filter comprises case with horizontal baffle with perforated sections. Besides, it comprises dust-chamber with front and rear face walls and two vertical skeleton filtration bags with their top open end secured to horizontal baffle perforated sections. It includes impure air feed pipeline, impure air intake chamber, and cleaned air chamber. There is extra air cleaning module arranged under cleaned air chamber to comprise horizontal panel of air pocket mesh filters (PMF) with inner frames. There is also a impure purge air discharge manifold and filtration bag recovery mechanism. Additionally, it includes PMF panel recovery mechanism with section-be-section air washing in suction mode. Besides, it incorporates filtration bag recover control mechanism and PMF panel recovery control mechanism. Besides, cleaned air manifold accommodates two manifolds to discharge cleaned air in additional cleaning module. Outlets of said manifolds accommodate two air distribution devices with one inlet and two distribution T-bends communicated via air ducts with additional dust-chambers. Additionally, PMF panel recovery control mechanism incorporates dust collection cycle limiting timer. Blow-off fan, controlled air gates and aforesaid timer allow automatic section-be-section recovery of PMF in continuous all-day-round air cleaning. Note here that blow-off fan pressure branch pipe is communicated via pipeline with opening in filter case face. Note also that additional dust-chamber top and bottom controlled air gates are turned through 90 degrees relative to each other while their electric drives are interlocked by one control signal.

EFFECT: decreased sizes, power savings.

4 cl, 13 dwg, 2 tbl

Description

The invention relates to the field of purification of air or gas, as well as mixtures thereof from mechanical impurities, in particular to the purification of suction air taken from woodworking grinding machines containing 100% wood grinding dust with abrasive particles, which is fire and explosion hazard, and return of purified air to the production room.

The claimed solution can be used in milling, textile, coal mining, chemical and other industries in which the suction air of production contains 100% fire and explosive dust such as wood grinding.

From the sources of scientific, technical and patent information, a large number of modifications of bag filters are known. Among them, those filters were selected as analogues and prototypes in which the filter frame sleeves are fixed with their upper open ends on perforated plates, the filter cloth in the sleeves is regenerated by back-flushing with cleaned air, and the filter elements of the third stage of cleaning are not regenerated, which makes it possible to continue them improvements in the direction indicated in the claims of the claimed solution.

The known system of three-stage purification of suction air of the Danish company "JHM-Moldow", described in the training manual V.E. Voskresensky "Systems of pneumatic transport, dust collection and ventilation in woodworking enterprises. Theory and practice". In two volumes. Volume 2. Part 1. Dust collection systems. Polytechnic, 2009 .-- 299 p. The specified three-stage air purification system consists of a bag filter having two air purification stages, made in the form of an inlet chamber and filter bags, and a third air purification stage, made in the form of a fabric air distributor (a large sleeve sewn from a filter cloth like СМ-360), located in the production room. The bag filter contains a dust collecting chamber with frame filter bags vertically located in it, fixed with its upper open ends on perforated plates, a supply pipe for polluted air, an inlet chamber for introducing polluted air, a purified air chamber mounted above the filter bags, at least one main centrifugal fan , a clean air outlet duct connected at one end to a cleaned air chamber, and at the other end to suction m nozzle of the main centrifugal fan, a recirculation duct connected to the discharge nozzle of the main centrifugal fan, a hopper mounted under the filter bags and having a discharge device with a lock gate.

In addition, the filter contains mechanisms for regeneration and regeneration control of filter bags, made in the form of a drive regeneration trolley with an axial purge fan mounted on it, equipped with a deflector for distributing purge air through the filter sleeves and placed inside the regeneration trolley, which has four rollers located in two profile guide rails installed along the edges of the purified air chamber, and four bumper rollers centering the regeneration bodies hedgehog in the lateral direction relative to the profile guide rails. Moreover, the regeneration trolley has a drive located in the form of a gear motor with a through output shaft installed in the bearing bearings of the trolley and sprockets fixed to its consoles, each of which is meshed with an individual duplex circuit serving as a “gear rack” and located in the groove of the profile guide rail of the track rollers of the trolley with preliminary tension. In addition, the regeneration trolley is equipped with a sliding rail device with running trolleys for the electric cable, mounted on the beams of the shelf floor of the cleaned air chamber above the filter bags.

The above three-stage air purification system from wood grinding dust has the following disadvantages.

1. The fabric air distributor installed in the white grinding workshop (explosion hazard category B), in order to ensure explosion and fire safety in the workshop, must be frequently replaced with a clean air distributor with the subsequent restoration of the dusty fabric air distributor to a working state, which causes high operating costs due to the following.

Explosion and fire hazard in the workshop arises from the fact that the fabric air diffuser does not have a mechanism for regenerating filter cloth and a device for periodically removing dust, which leads to the accumulation of explosive wood dust in it.

Violation of sanitary and hygienic working conditions in the workshop occurs due to the penetration of moisture and heat released from the workshop workers and from the technological equipment into the tissue air diffuser, and the formation of pathogenic bacteria in the dust layer when it is in the tissue air distributor for a long time that, together with recirculated air, enter inside the workshop. After dismantling, the dusty fabric air distributor is turned outward with a dust layer, the fabric is blown with an air stream, then it is washed in a soapy solution with the addition of disinfecting components and dried. After that, the air diffuser is turned out, returning it to its original state.

2. There is no inspection corridor in the filter cleaned air chamber for mounting and dismounting the filter bags, as well as for servicing the purge fan and the cart drive mounted on the regeneration cart, and the sliding rail device with carts for the electric cable, which increases operating costs.

3. A sliding rail device with trolleys for an electric cable due to the lack of an inspection corridor in the cleaned air chamber is fixed above the fabric filter bags. In the event of a breakdown of the electric cable, which is possible as a result of repeated bending of the cable during the movement of the regeneration trolley, a sheaf of sparks resulting from the breakdown will fall into the sleeves and cause a fire in the filter, which will lead to the subsequent replacement of part of the filter sleeves and will result in additional costs for the purchase of sleeves and additional operational the cost of dismantling the burnt sleeves and the installation of new sleeves in the filter.

4. An axial purge fan having a square casing and a lower airflow outlet into the deflector located inside the regeneration trolley does not provide uniform blowing of 12 filter bags located in one row with a length of 2.4 m, which reduces the service life of poorly purged bags. The uneven service life of the filter bags causes increased operating costs for the detection of failed bags.

The closest in technical essence and the achieved result is "Filter bag for three-stage air purification from mechanical impurities" patent No. 2336930 C2 with a priority of September 12, 2006, IPC B01D 46/02, which contains at least one row of filtering modules, each of which has two dust-collecting chambers installed with an interval between their side walls, equipped with tube sheets in the upper part with through pipes and sections of vertically arranged filter bags fixed to the upper and open ends on the pipes of the tube sheets, a manifold of variable cross-section for introducing contaminated air, located in the interval between the dust collecting chambers, a manifold for purging air, a purge air manifold equipped with an inlet valve with a shut-off valve, a main centrifugal fan installed at the front end of each row of modules, and recirculation duct, valve boxes mounted on tube sheets with poppet type actuating valves located in them, interacting Along with two coaxial openings for purge and purified air, located on the horizontal axis of the purge air manifold one above the other in each valve box, and two mirror-mounted valve boxes of one module have a common partition separating pairs of their coaxial openings, an airtight service chamber mounted on valve boxes, a hopper made of three parts, the upper of which is square, and the lower is cylindrical in shape, holes are provided in the upper part of the hopper for entering polluted air, equipped with guiding shields and rotary dampers installed on the central partition dividing the hopper vertically, a louvred grille is inclined under each dust collecting chamber, and the lower cylindrical part of the hopper is made in the form of an annular groove with an opening for unloading mechanical impurities into the sluice unloader with the location of the gateway unloaders in adjacent rows of modules in a staggered manner, above the trench along the axis of the cylindrical part, a drive e conical-cylindrical unloading device with blades mounted radially on the outer surface of the cylindrical part and lowered into the trough, in addition, the filter contains at least one single-row panel of air cell filters, and the purge air manifold is equipped with an additional centrifugal fan, discharge pipe which is connected to the inlet of the purge manifold. The known filter differs in that the panel of air cell filters is installed horizontally in the gap between the dust collection chambers under the valve openings for purified air to form an upper chamber of purified air, which is connected to the suction pipe of an additional centrifugal fan, and a lower chamber of additional purified air, made with one open end, to which a manifold of cleaned air outlet is attached, protruding beyond a number of modules and having two vertical side walls with rectangular windows, into which honeycomb lattices are built, made of flat and corrugated ribbons of heat-resistant material, having a total living area of corrugations, which prevents the passage of fire through them at an installed capacity of the main centrifugal fan, in addition to a cleaned output collector air at the outlet of the panels of fire barriers are connected to the receiving manifolds of variable cross section, the outlet openings of which are connected to the pipe collecting s Tee connected at the output with the main suction pipe of the centrifugal fan.

Despite the large number of coinciding features of the prototype and the claimed solution, the lack of distinctive features of the latter in the prototype does not provide a technical result consisting in lowering operating costs and the cost of manufacturing the filter and expanding its functionality, for the following reasons.

1. The complex and expensive mechanism for controlling the regeneration of hose sections is characterized by insufficient reliability and can cause subsequent repairs.

2. Special processing of compressed air supplied to the valve control pneumatic cylinders is required, requiring a compressed air purification station.

3. In the cold season, air heating is required in a sealed filter service chamber, in which the valve control pneumatic cylinders are located.

4. The mechanism for controlling the regeneration of filter bags by reverse sectional purging is characterized by high material consumption and high labor costs for manufacturing, which increases the cost of manufacturing the filter.

5. The additionally purified air chamber does not have an inspection corridor for mounting and servicing the panel of air cell filters, which increases operating costs.

6. Installation of inspection hatches at the inlet to the valve boxes increases the cost of manufacturing a filter due to the additional cost of inspection hatches.

7. The filter due to the presence of a complex mechanism for controlling the regeneration of the hose sections does not ensure the stability of obtaining high efficiency air purification E,%.

8. The filter does not have a regeneration system for the panel of air cell filters of the type FJAK, which causes the accumulation of a large amount of explosive wood dust in the panel of the FAC, which explodes when static electricity is generated or sparks slip into the filter hopper. At the same time, not only air cell filters made of FNII-3 fabric are burned, but also filter bags. During the repair repair of the filter, the burnt filtering sleeves and air filter cells of the FCF are dismantled and replaced with new ones, which causes high operating costs.

9. The absence in the filter of the regeneration system of the PFC panel and the accumulation of a large amount of dust in it create conditions for the formation of a dust explosion in the filter, which requires the installation of fire barriers at the outlet of the filter, which limit the air filter performance, for example, with a sleeve length l = 4 m up to 15000 m ³ / h. Thus, the presence of fire barriers in the filter limits the functionality of the filter to increase its air performance. The complexity of the mechanism for controlling the regeneration of hose sections is caused by the fact that the valves intended for sequentially opening the holes in the purge manifold and supplying purified air to the hose sections through them at predetermined time intervals are controlled by pneumatic cylinders, and compressed air is supplied to the lower and upper cavities of the pneumatic cylinders consecutive time delays. For a number of modules of the prototype, consisting, for example, of eight hose sections, the regeneration control scheme of the hose sections includes 8 pneumatic cylinders, 8 electromagnetic air distributors and a PURF device (filter regeneration control device).

Such a valve control mechanism has a high cost and low reliability.

The need for a compressed air purification station is dictated by the fact that to supply compressed air to the valve control pneumatic cylinders, it must be cleaned at least grade 10 according to GOST 17433-80 and saturated with sprayed oil (2-4 drops per 1 m ³ ) with a viscosity of 10- 35 mm ² / s at a temperature of 50 ° C.

The need for heating the air in a sealed service chamber, in which the pneumatic cylinders are located, is dictated by the requirements for creating normal working conditions for pneumatic cylinders to ensure their operability in the cold season.

The large consumption of materials and the cost of manufacturing a mechanism for controlling the regeneration of filter bags by reverse sectional purging are due to the following. For the manufacture of the mechanism requires: a purge manifold and valve boxes with holes for purge and purified air, having seats for pneumatic cylinder valves, inspection hatches with seals in each valve box according to the number of sections of filter bags, as well as pneumatic cylinders with self-adjusting valves and electromagnetic air distributors, PURF device to control the electromagnets of the air diffusers of the filter.

The lack of stability in obtaining high efficiency air purification E,%, is due to the following reason, which limits the functionality of the bag filter. The mechanism for controlling the regeneration of filter bags contains a group of pneumatic cylinders that have valves on their rods that alternately overlap the openings for supplying purge air to the regenerated section of the bags and openings for the release of purified air, one above the other.

Pneumatic cylinders are controlled by electromagnetic air distributors. In the event of failure of any of the electromagnets, the direction of air supply to the pneumatic cylinder planned according to the sequence diagram will not occur, which will not open the holes for supplying purge air to the regenerated section of the arms. As a result, after several regeneration cycles, dust will clog the filter sleeves of the section, disconnect from regeneration, and the air permeability of the sleeve fabric sharply decreases, i.e. the so-called “collapse” will occur, and all air with dust in the cleaning mode will be filtered through the sleeves of the remaining sections. In this case, the air and dust load on the sleeves of these sections will increase, which will lead to a decrease in the efficiency of air purification E,%. The restoration of the previous high efficiency of air purification is possible only after the replacement of a failed electromagnet in the air distributor.

The task to which the claimed solution is directed, consisted in further improving the known design of a bag filter with three-stage air purification from mechanical impurities, which include 100% wood grinding dust, and obtaining a technical result - reducing operating costs and manufacturing costs of the filter and expansion of its functionality.

The achievement of the above technical results is achieved using a bag filter for three-stage air purification from mechanical impurities, comprising a housing with a horizontal partition having perforated sections, a main dust collecting chamber, containing front and rear end walls and two sections of vertically arranged frame filter bags fixed with upper open ends on perforated sections of the horizontal partition, at least one supply pipe per contaminated air, an inlet chamber for introducing polluted air, a purified air chamber, an additional air purification module containing at least one horizontally mounted panel of air cell filters of the FYAK type, an additional dust collection chamber and an additional purified air chamber, a main centrifugal fan and a recirculating air duct, a hopper installed under the filter bags and the inlet chamber for the input of contaminated air, having a discharge device and a lock for creatine, a collector for outputting additionally purified air, connected at the inlet through a collecting tee with holes in the chamber of additionally purified air and at the outlet with a suction pipe of the main centrifugal fan, the discharge pipe of which is connected to a recirculation duct, a filter bag regeneration mechanism comprising an additional centrifugal fan, a mechanism filter bag regeneration control, horizontal partition of the filter housing is made from the right, central left and right platforms, the central of which contains two perforated sections with an inspection corridor located between them, the main dust chamber is located under the central platform, the inlet chamber is installed under the right platform of the horizontal partition with hermetic connection to the front end wall of the main dust chamber, the purified air chamber placed above the horizontal partition, the module for additional air purification is installed under the left platform of the horizontal small towns with its tight connection to the rear end wall of the main dust collection chamber and is made of four panels of air cell filters equipped with internal wire frames, with the formation of eight individual dust collection chambers from the bottom of the panels and the installation of additional purified air chamber on top of the panels, which is equipped with an inspection corridor and inspection a door placed between the panels of air cell filters, each of which is made double-row with distribution in each row there is one additional dust collection chamber with an individual section of air cell filters, in addition, the additional air purification module is equipped with collectors for introducing purified air into the additional dust collection chambers and removing polluted purge air from them, air distribution devices, as well as regeneration and regeneration control mechanisms panels of cell air filters, manifolds for introducing purified air into the module for additional air purification are installed in the purified air chamber and connected at the outlet to air distribution devices, each of which has one inlet and two distributing tees of square section, connected at the outlet through the air ducts with additional dust collection chambers, with an entrance to them between the panels of cell air filters on both sides inspection corridor of the chamber of additionally purified air, the filter bag regeneration mechanism is equipped with a second additional centrifugal fan, the mechanism is controlled the regeneration of filter bags is equipped with a regeneration trolley located in the cleaned air chamber, with a gear motor mounted on it with an integrated electromagnetic brake and a drive gear mounted on an additional splined shaft installed in the hollow output splined shaft of the gear motor and having an additional bearing support, a gear rack mounted on a support-guide rail located in the center of the inspection corridor of the central platform, with the formation of a rack and pinion the clutch ”of the gear gear of the gearmotor with a gear rack, a sliding rail device with running trolleys for supporting the electric cable installed on the beams of the ceiling of the cleaned air chamber above the inspection corridor of the central platform, as well as two positioning rulers mounted on the side walls of the cleaned air throughout the length of the main dust collection chamber and having motion interrupters made on the rulers in the form of holes with a pitch of the arrangement of filter rows hoses and a control unit for the electric motor of the gearmotor motor, made with two optical sensors mounted on the regeneration trolley with the possibility of their interaction with the motion breakers of the positioning ruler and providing the mode of stepwise movement of the regeneration trolley with precise positioning of the purge deflectors when it stops above the blown row of sleeves of both sections the main dust collection chamber, as well as the purge mode of the filter bags when the regeneration is stopped the cart for a predetermined time set on the time relay, additional centrifugal fans of the filter bag regeneration mechanism are installed on the regeneration cart according to the PR180 ° and Л180 ° scheme with the location of their discharge pipes in the center of the cart and connecting to them through the knee-shaped diffusers of blowing deflectors of variable cross section having side wings and bottom with nozzle purge nozzles, which are made to ensure that they overlap three rows of filter bags of both arms sections with purging the middle row of filter bags with the regeneration carriage stopped and secured to it with the formation of a transport gap between the nozzle purging nozzles of the purging deflectors and the open ends of the filter bags, the regeneration mechanism of the air cell filter panels contains a centrifugal purging fan for sectional purging of the air cell filter panels purified air in the suction mode, the mechanism for controlling the regeneration of panels in cell air filters are made of a dust accumulation cycle time limit timer in cell air filter panels and sixteen controllable air dampers installed on air ducts that are located at the inlet of cleaned air in the additional dust collection chambers and at the outlets from them of polluted purge air, the collector of the output of contaminated purge air is made in the form of four collecting tees, the inlet openings of which are connected to the openings for the output of a contaminated purge about air from the chambers of additional dust collection, and prefabricated tee sections are connected to the inlet openings of the fifth and sixth collecting tees, the outlet openings of which are connected by an air duct to the suction port of a centrifugal purge fan, which together with control air dampers and a dust accumulation timer in the panels of cell air filters provides automatic section-by-section regeneration of air filter panels with a continuous circle 24 hours air purification without disconnecting the filter from the process equipment, while the discharge pipe of the centrifugal purge fan is connected through a pipeline to the hole in the end of the filter hopper.

-образных рельсах, закрепленных на боковых стенках камеры очищенного воздуха, и снабжена четырьмя центрирующими тележку и четырьмя поддерживающими ее от прогиба устройствами, первые из которых выполнены в виде вертикальных полуосей с установленными на них центрирующими шарикоподшипниковыми роликами, а вторые - в виде подвесных опор с горизонтальными полуосями и установленными на них поддерживающими шарикоподшипниковыми роликами, центрирующие и поддерживающие регенерационную тележку устройства скомпонованы попарно в два центрирующе-поддерживающие блока, установленных на торцах регенерационной тележки по ходу ее движения, с охватом центрирующими шарикоподшипниковыми роликами свободных наружных боковых поверхностей упомянутого поддерживающе-направляющего рельса и образованием между ними транспортного зазора, а поддерживающие шарикоподшипники размещены в

-образных ходовых направляющих упомянутого поддерживающе-направляющего рельса, при этом мотор-редуктор вместе с дополнительной подшипниковой опорой закреплены на внутренней стороне одного из центрирующе-поддерживающих блоков.Moreover, in the filter bag for a three-stage air purification from mechanical impurities, the regeneration trolley is made in the form of a frame having four semi-axes with running ball-bearing rollers mounted on them, which are placed in the running

-shaped rails mounted on the side walls of the cleaned air chamber, and is equipped with four centering trolleys and four deflection supporting devices, the first of which are made in the form of vertical half shafts with centering ball-bearing rollers mounted on them, and the second in the form of suspension supports with horizontal with semi-axes and supporting ball-bearing rollers mounted on them, the centering and supporting regeneration trolleys are arranged in pairs in two centering e-supporting blocks mounted on the ends of the regeneration trolley in the direction of travel, with the centering ball bearings covering the free outer side surfaces of the supporting rail and forming a clearance between them, and the supporting ball bearings are located in

-shaped running guides of said supporting-guide rail, while the gear motor together with an additional bearing support are fixed on the inside of one of the centering-supporting blocks.

Moreover, in the filter bag for three-stage air purification from mechanical impurities in each additional dust collection chamber, the upper and lower controlled air dampers are rotated 90 ° to each other, and their electric drives are controlled by one control signal.

Moreover, in the filter bag for a three-stage air purification from mechanical impurities, the nozzle purge nozzles of the purge deflectors of the regeneration carriage are made with a smaller purge area than the area of the purge deflector inlets.

The evidence of the materiality of the differences and the relationship of the features with the achieved technical results are disclosed sequentially in the following order.

1. Reducing operating costs and the cost of manufacturing the filter.

2. Extension of filter functionality.

The technical result, which consists in reducing operating costs and the cost of manufacturing a filter, is provided by the following advantages of the proposed solution over the known.

1. Increasing the operational reliability of the mechanism for controlling the regeneration of filter bags and reducing the cost of the electrical circuit.

2. The elimination of special processing of compressed air together with the processing station due to the rejection of the use of compressed air.

3. The elimination of operating costs for heating the air in the service chamber in the cold season.

4. Reducing the cost of the mechanism for controlling the regeneration of filter bags by reducing its material consumption.

5. Reducing operating costs for installing panels of air cell filters, replacing dusty filters with clean ones, as well as for washing and drying dusty filters in a special room, which is freed.

6. Reducing operating costs for filter filter repair after dust explosions by creating a new automatic system for sectional regeneration of FCF panels with additionally purified air by means of a low-energy blowing centrifugal fan with a capacity of L = 6000 m ³ / h in the suction mode without disconnecting the filter from the process equipment, which eliminates the conditions to create explosions and return contaminated purge air to the filter hopper.

Obtaining these advantages is carried out due to the following technical solutions.

Technical Solution 1

The horizontal partition of the filter housing is made of right, central and left platforms, the central of which contains two perforated sections with an inspection corridor located between them, the main dust collecting chamber is located under the central platform, the inlet chamber is installed under the right platform of the horizontal partition with hermetic connection to the front end the wall of the main dust collection chamber, the cleaned air chamber is located above the horizontal partition, the add-on module A new air purification is installed under the left platform of the horizontal partition with its tight connection to the rear end wall of the main dust collecting chamber.

Technical Solution 2

-образных рельсах, закрепленных на боковых стенках камеры очищенного воздуха, и снабжена четырьмя центрирующими тележку и четырьмя поддерживающими ее от прогиба устройствами, первые из которых выполнены в виде вертикальных полуосей с установленными на них центрирующими шарикоподшипниковыми роликами, а вторые - в виде подвесных опор с горизонтальными полуосями и установленными на них поддерживающими шарикоподшипниковыми роликами, центрирующие и поддерживающие регенерационную тележку устройства скомпонованы попарно в два центрирующе-поддерживающие блока, установленных на торцах регенерационной тележки по ходу ее движения, с охватом центрирующими шарикоподшипниковыми роликами свободных наружных боковых поверхностей упомянутого поддерживающе-направляющего рельса и образованием между ними транспортного зазора, а поддерживающие шарикоподшипниковые ролики размещены в

-образных ходовых направляющих упомянутого поддерживающе-направляющего рельса, при этом мотор-редуктор вместе с дополнительной подшипниковой опорой закреплены на внутренней стороне одного из центрирующе-поддерживающих блоков.The filter bag regeneration control mechanism is equipped with a second additional centrifugal fan, the filter bag regeneration control mechanism is equipped with a regeneration trolley located in the cleaned air chamber, with a gear motor mounted on it with an integrated electromagnetic brake and a drive gear mounted on an additional splined shaft installed in the floor output splined shaft of the gear motor and having an additional bearing support, a gear rack mounted on and a supporting-guide rail located in the center of the inspection corridor of the central platform, with the formation of a “rack gear” of the gear gear of the gear motor with the gear rack, a sliding rail device with running trolleys for supporting the electric cable installed on the beams of the ceiling of the cleaned air chamber above the inspection corridor the central platform, as well as two positioning rulers installed on the side walls of the purified air chamber along the entire length of the main dust a trap chamber and having motion interrupters made on the rulers in the form of holes with a pitch of the rows of filter bags and a motor gear motor control unit made with two optical sensors mounted on a regeneration trolley with the possibility of their interaction with the interrupters of the positioning ruler and providing the stepping mode movement of the regeneration trolley with precise positioning of the purge deflectors when it stops above the purged row of hands in both sections of the main dust collection chamber, as well as the purge mode of the filter bags when the regeneration trolley is stopped for a predetermined time set on the time relay, additional centrifugal fans of the filter bag regeneration mechanism are installed on the regeneration trolley according to the PR180 ° and L180 ° scheme with the location of their discharge nozzles in the center of the trolley and connecting to them through knee-shaped diffusers of blowing deflectors of variable cross section having side wings and but with nozzle purge nozzles, which are designed to ensure that they overlap three rows of filter bags of both bag sections with the middle row of filter bags purged while the regeneration trolley is stopped and fixed on it with the formation of a transport gap between nozzle purge nozzles of the purge deflectors and the open ends of the filter bags. The regeneration trolley is made in the form of a frame having four half shafts with running ball-bearing rollers mounted on them, which are placed in the running

-shaped rails mounted on the side walls of the cleaned air chamber, and is equipped with four centering trolleys and four deflection supporting devices, the first of which are made in the form of vertical half shafts with centering ball-bearing rollers mounted on them, and the second in the form of suspension supports with horizontal with semi-axes and supporting ball-bearing rollers mounted on them, the centering and supporting regeneration trolleys are arranged in pairs in two centering e-supporting blocks mounted on the ends of the regeneration trolley in the direction of its movement, with the centering ball-bearing rollers covering the free outer side surfaces of the said supporting-guide rail and the formation of a transport gap between them, and the supporting ball-bearing rollers are placed in

-shaped running guides of said supporting-guide rail, while the gear motor together with an additional bearing support are fixed on the inside of one of the centering-supporting blocks.

The nozzle purge nozzles of the purge deflectors of the regeneration trolley are made with a smaller area of the purge holes than the area of the inlets of the purge deflectors.

Technical Solution 3

The additional air purification module is made of four panels of air cell filters equipped with internal wire frames, with the formation of eight individual dust collection chambers from the bottom of the panels and the installation of additional cleaned air chambers on top of the panels, which is equipped with an inspection corridor and an inspection door located between the panels of air cell filters, each of which is made double-row with the location in each row of one chamber of additional dust tacking with an individual section of air cell filters, in addition, the module for additional air purification is equipped with collectors for introducing purified air into the chambers for additional dust collection and removal of polluted purge air from them, air distribution devices, as well as mechanisms for regenerating and regenerating control panels of air cell filters, collectors for introducing purified air in the module for additional air purification are installed in the purified air chamber and are connected at the outlet to air distribution devices, each of which has one inlet and two distributing tees of square cross section, connected at the outlet through the air ducts with additional dust collection chambers, with the entrance to them between the panels of air cell filters on both sides of the inspection corridor of the additional purified air chamber.

Technical Solution 4

The mechanism of regeneration of panels of air cell filters contains a centrifugal purge fan for sectional purging of panels of air cells of filters with additionally purified air in the suction mode, the mechanism for controlling the regeneration of panels of air filters is made of a timer for limiting the dust cycle in panels of air filters and sixteen controlled air dampers installed on ducts that are placed at the inlet of purified air into the chambers dust collector and at the exits from them polluted purge air, the collector for the output of polluted purge air is made in the form of four collecting tees, the inlet openings of which are connected to the holes for outputting contaminated purge air from the additional dust collection chambers, and the assembled sections of the tees are connected to the inlet openings of the fifth and sixth collecting tees, the outlet openings of which are connected by an air duct to the suction port of a centrifugal purge fan and, which, together with controlled air dampers and a timer for restricting dust accumulation time in the panels of air cell filters, provides automatic sectional regeneration of the panels of air cell filters with continuous round-the-clock air purification without shutting down the process equipment, while the discharge pipe of the centrifugal purge fan is connected by a pipe to the hole in the end of the hopper filter.

In each additional dust collection chamber, the upper and lower controlled air dampers are rotated 90 ° to each other, and their electric drives are controlled by one control signal.

Technical solution 1 in comparison with the filter prototype provides the following.

1. Lower operating costs due to:

- placement of the cleaned air chamber above the horizontal partition, which ensures the open ends of the entire set of filter bags of both bag sections in one cleaned air chamber, and not in different valve boxes having inspection hatches;

- the presence of an inspection corridor on the central platform of the horizontal partition, which allows reducing labor costs for installing a new one and dismantling the worn-out set of filter bags in both bag sections;

- placement of the cleaned air chamber above the horizontal partition, which allows you to eliminate valve boxes with inspection hatches having rubber seals that require maintenance and periodic replacement as loss of elasticity.

2. Reducing the cost of manufacturing a filter due to:

- placement of the cleaned air chamber above the horizontal partition, which allows you to replace the material-intensive and expensive mechanism for the regeneration of filter bags with pneumatic cylinders and shut-off valves on their rods on a regeneration trolley with step movement, which is placed in the cleaned air chamber;

- performing a horizontal partition of three platforms (right, central and left) with the main dust collection chamber under the central platform, under the right platform - an inlet chamber for entering contaminated air and under the left platform - an additional air purification module that allows the regeneration carriage to roll onto the right and the left platform to wait for the next regeneration cycle, and during regeneration to provide regeneration of the bags of the extreme rows of filter bags of both bag sections second, reducing the length and cost of the main dust collecting chamber.

Technical solution 1 in comparison with an analog filter provides a reduction in operating costs due to:

- the formation of an inspection corridor on the central platform of the cleaned air chamber, which allows reducing labor costs for assembling a new and dismantling a worn set of hoses, as well as for servicing a purge fan, a regeneration carriage drive and a sliding rail device with running carriages for an electric cable;

- the formation of an inspection corridor on the central platform of the cleaned air chamber, which, when the electric cable is broken, which is possible from repeated bending when moving the regeneration trolley and the formation of sparks, will perceive the falling sparks, extinguish them and protect the filter cloth sleeves from fire and thereby eliminate the additional acquisition costs new filter bags instead of burnt ones.

Technical solution 2 in comparison with the filter prototype provides the following.

1. Reducing operating costs by replacing a complex mechanism for controlling the regeneration of filter bags using pneumatic cylinders with valves on their rods with a simple mechanism for controlling the regeneration of filter bags in the form of a regeneration trolley located inside the cleaned air chamber, which has a simple wiring diagram and high operational reliability, not requiring repairs, the use of compressed air and additional heating of the air in the service chamber in the cold season, which fixed.

2. Reducing the cost of manufacturing the filter through the use of a regeneration trolley, which eliminates:

- service camera;

- valve boxes mounted on perforated plates;

- purge manifold;

- inspection hatches in each section of filter bags;

- pneumatic cylinders with self-adjusting valves on the rods;

- electromagnetic air distributors;

- PURF device for controlling electromagnets of air distributors;

- compressed air preparation station.

Technical solution 2 in comparison with an analog filter provides the following.

1. Lower operating costs due to:

- replacing one purge axial fan with a square case and a lower air flow outlet into the 2.4 m deflector installed inside the regeneration trolley and not providing uniform purge of the filter bags along the length of the row of 12 bags with two additional centrifugal fans equipped with the outlet with purge deflectors 1050 mm long with guide vanes and side wings that overlap three rows of filter bags in both bag sections and provide simultaneous quality regular blowing of 5 filter bags at the beginning of one bag section, and in the reverse course of the regeneration trolley - 5 bags of the second bag section and unhindered dusting from the regenerated bags, the same service life of the entire set of filter bags and the simultaneous replacement of the entire set of worn bags with new ones with non-simultaneous replacement with uneven purging of the sleeves;

- performing purge deflectors of filter bags with a bottom and nozzle nozzles, which at each stop of the regeneration trolley are precisely positioned above the purge of a number of bags, which reduces the flow of purge air and reduces the energy consumption for purging the filter bags.

2. Reducing the cost of driving the regeneration carriage by replacing the drive shaft with two bearing bearings with two sprockets and two duplex chains serving as “gear racks” mounted on running rails on a single gear rack with gear mounted on a supporting rail and on additional shaft gear motor.

Technical solutions 3 and 2 in comparison with the filter prototype provide:

a) reducing the metal consumption of the housing with filter bags by moving the module for additional air purification outside the main dust chamber of the bag filter and installing additional centrifugal fans on the regeneration trolley according to the PR180 ° and L180 ° scheme, which reduces the width of the inspection corridor in the cleaned air chamber, which ensures obtaining independent from each other designs of the dust collecting chamber with filter bags of any length that does not need partitions, and add the module linen cleaning, the length of which is not related to the length of the dust collecting chamber, as well as reducing the width of the filter and, as a result, reducing the cost of the filter;

b) reduction of the metal consumption of the additional air purification module due to the location of the additional purification module along the entire filter width and its implementation from four double-row FJC panels equipped with two air distribution devices, each of which has one inlet, and distributing purified air through the additional dust collection chambers, which allows reduce the length of the module and, as a result, reduces the cost of the filter.

Technical solution 3 provides a reduction in operating costs by supplying the chamber with additionally purified air with an inspection corridor and an inspection door, which allow installation and dismantling of air cell filter panels and their maintenance with the lowest labor costs.

Technical solutions 3 and 4 provide an increase in the number of sections of the PFC in the module for additional air purification from one to eight and the connection of the discharge pipe of the purge fan with an air duct with an opening in the end of the hopper, which allows

a) reduce the size of the purge fan;

b) reduce the diameter and length of pipelines to remove contaminated purge air;

c) reduce the size of controlled air dampers in the collector for removing contaminated purge air.

Technical solution 4 provides a reduction in operating costs due to the introduction of mechanisms for the regeneration and regeneration control of air filter cells of the FCF, which do not allow dust to accumulate in large quantities, which eliminates the possibility of dust explosions in the chamber for additional dust collection. The absence of dust explosions eliminates filter repairs and, as a result, reduces operating costs.

The technical result, which consists in expanding the functionality of the filter, is provided by the following advantages of the proposed solution over the known ones.

1. The creation of stability to obtain high efficiency air purification E,%, in the filter.

2. The creation of automatic section-by-section regeneration of air cell filters of the type of FCN with continuous round-the-clock air purification.

3. By creating a step-by-step movement mode of the regeneration trolley with precise positioning of the purge deflectors when it stops above the purge series of filter bags, as well as by their purging by the time relay.

4. Expansion of the filter performance range.

The stability of obtaining high efficiency air purification E,%, in the filter is ensured by increasing the operational reliability of the proposed mechanism for controlling the regeneration of filter bags in the form of a regeneration trolley with step movement, proposed in technical solution 2, in comparison with the mechanism for controlling the regeneration of filter bags in the prototype filter .

Improving the reliability of the regeneration control mechanism of the filter bags is achieved by reducing the number of control elements of the mechanism, which is determined by comparing the composition of the elements in the regeneration control mechanisms in the prototype filter and in the inventive filter with the same filter performance equal to, for example, L = 36000 m ³ / h .

In the prototype filter with the indicated capacity, it will be necessary to install 18 hose sections with a capacity of L = 2000 m ³ / h, the regeneration of which will be controlled by a mechanism consisting of 18 pneumatic cylinders with 18 electromagnetic air distributors that may fail.

In the inventive filter according to the technical solution, two non-contact optical sensors control the step-by-step movement of the regeneration trolley.

Given that the reliability of mechanisms increases with a decrease in the number of elements of this mechanism, it can be argued that the operational reliability of two optical sensors will be higher than 18 electromagnets. Thus, the proposed control mechanism for the regeneration of filter bags will ensure uninterrupted regeneration of the filter bags with a given regeneration cycle, which will not allow critical dusting and, as a result, will create the stability of obtaining high cleaning efficiency E,%.

Automatic sectional regeneration of air filter panels without disconnecting the filters from technological equipment is provided by technical solutions 3 and 4, in which eight additional dust collection chambers with individual sections of the air filter cells are equipped with sixteen controllable air dampers installed in the air ducts at the cleaned air inlets to the additional dust collection chambers and at the exits from them the polluted purge air, and also are equipped with a timer m dust restrictions in air cell filters. Additional dust collection chambers are connected through the collector for the output of contaminated purge air to the suction port of the central purge fan, the discharge pipe of which is connected through an air duct to the hole in the filter hopper. In each additional dust collection chamber, the upper and lower controlled air dampers are rotated 90 ° relative to each other, and their electric drives are controlled by a single control signal. In the regeneration mode, which begins after the activation of the dust accumulation restriction timer in the panels of the FC, all sections of the FC are purged sequentially. In this case, seven sections of the FC are always in the filtering mode, and one section in the regeneration mode. For example, the filter capacity L _f = 42000 ^m3 / h and the output PF index 8841 cells equal to L _PF = 2000 m ³ / h, in the regeneration mode, the purge fan capacity amount L _ave = n _PF · L _PF = 3 x 2000 = 6000 m ³ / h, and the amount of cleaned air will be L _f = n _s × n _sFFC × L _FSC = 7 × 3 × 2000 = 42000 m ³ / h.

Technical solution 2 provides for the creation of a step-by-step movement mode of the regeneration carriage by supplying the regeneration control mechanism of the filter bags with two positioning rulers, two optical sensors and a motor-gear control unit made with an integrated electromagnetic brake. The stepwise movement of the regeneration trolley with nozzle blowing of the filter bags along the time relay ensures high-quality regeneration of the filter bags at any initial dust content C _n (mg / m ³ ).

The expansion of the filter performance range is provided by technical solutions 1, 3 and 4.

In the technical solution, 1 additional air purification module is installed under the left platform with its airtight connection to the rear end wall of the main dust collecting chamber, which ensured the placement of the cell air filter panels of the module over the entire filter width and an increase in their number.

In technical solution 3, the additional air purification module is made of four panels of air cell filters with the formation of eight individual dust collection chambers under the panels with sections of air filters and the installation of additional cleaned air chambers with an inspection corridor and an inspection door on top of the panels.

The presence in the module of the additional air purification of eight additional dust collection chambers with the placement of three cells of the FC in each of them allows the module to be made of 24 cells of the FC.

With the performance of one cell of the FSC of the index 8841 L, the _FSC = 2000 m ³ / h and being in the regeneration mode of one of the eight sections of the FAC for regeneration, the filter performance will be L = 24 × 2000-3 × 2000 = 42000 m ³ / h.

In technical solution 4, the control mechanism for the regeneration of the panels of air cells of the FCF is made up of a dust restriction timer in the cells of the FCF and sixteen controlled dampers installed on the air ducts, which are located at the inlet of the cleaned air in the additional dust collection chambers and at the outlet of the polluted purge air from them. Technical solution 4 eliminates the conditions for the formation of explosions, which allows you to abandon the fuses that limit the performance of the filter, and increase the performance of the inventive filter L in comparison with the filter prototype from 12000 to 42000 m ³ / h

The design of the inventive bag filter is illustrated by the drawings in figures 1-13. In Fig.1 shows a section FJ (Fig.2); figure 2 section aa (figure 1); figure 3 is a section bb (figure 2); figure 4 - section II (figure 2); figure 5 - section CC (figure 2); Fig.6 is a section DD (in Fig.5); Fig.7 is a section GG (Fig.6); on Fig - section ZZ (Fig.7); figure 9 is a section EE (figure 6); figure 10 is a view A (figure 1); figure 11 is a view In (figure 1); in Fig.12 is a view C (in Fig.1), Fig.13 is the interaction of the optical sensors 118 and 119 installed on the regeneration trolley 53, with holes 117 on the rulers positioning 116.

The filter (figure 2) contains a housing 1 with a horizontal partition 2 having a right 3, central 4 and left 5 platforms, with the implementation of the central platform 4 of two perforated sections (right 6 and left 7) and the inspection corridor 8 located between them, the main a dust collecting chamber 9, containing front 10 and rear 11 end walls and vertically arranged filter frame sleeves 12, arranged in two sections 13, 14 and secured with upper open ends on the perforated sections 6, 7 of the horizontal partition 2 using double snap snap rings (not shown in the drawings), inlet pipes for polluted air 15, an inlet chamber for introducing polluted air 16, mounted under the right horizontal platform 3, with hermetic connection to the front end wall 10 of the main dust collection chamber 9, module additional air purification 20, mounted under the left platform 5 of the horizontal partition 2 with hermetic connection to the rear end wall 11 of the main dust collection chamber 9 and containing Fourth double-row panels 21 of air cell filters 22 of the type ФЯК with an internal wire frame (not shown in the drawings), with the placement of their sections 28, 29, 30, 31, 32, 33, 34, 35 in individual chambers of additional dust removal 36, 37, 38, 39, 40, 41, 42, 43, and an additional purified air chamber 23 mounted above them with an inspection corridor 24 and an inspection door 25 located between the double-row panels of the air mesh filters 21.

In addition, the filter contains at least one main centrifugal fan 49 and a recirculation duct 50, a hopper 51, mounted under the filter frame sleeves 12, having a discharge device 52, a discharge opening 53 with a slide gate 54 and a lock gate 55, a collector for outputting additional purified air 56, connected at the inlet with openings 27 in the side wall of the chamber of additionally purified air 23 and at the outlet with the suction pipe of the main centrifugal fan 49, the discharge pipe connected to the recirculation duct 50, the regeneration mechanism of the filter bags 57 containing two additional centrifugal fans 58, 59 mounted on the regeneration trolley 60 according to the PR180 ° and Л180 ° scheme with the location of their discharge pipes in the center of the truck and the connection of the discharge pipes through knee-shaped diffusers 115 with purge deflectors 61, which are provided with a bottom with nozzle nozzles 63 and side wings 64, designed to provide reverse sequential purge of the filter bags 12 of both sections 13, 14 of the main dust collection chamber 9 with cleaned air and simultaneous overlapping of the open ends of the filter bags 12 located in the left 65 and right 66 rows of bags on both sides of the blown row 67, the regeneration mechanism of the panel of air cell filters 68, containing a centrifugal fan 69 for sectional purging of the panel of air cell filters, FFC with additionally purified air in the suction mode, a mechanism for controlling the regeneration of filter bags 70, containing regenerative a bed 60 having four running ball-bearing rollers 71 mounted in running rails 72 mounted on the side walls of the cleaned air chamber 17, and four centering devices 73 of the regeneration trolley in the axial direction along its movement, made in the form of vertical stationary axes 74 with cantilever mounted on them with centering ball-bearing rollers 75, a gear motor 82 with an integrated electromagnetic brake and a drive gear 83 mounted on an additional shaft 87, the splined end of which Tavlya the hollow splined output shaft of the geared motor 82, and the other end of its sleek installed additional bearing support 88.

-образных ходовых направляющих упомянутого поддерживающе-направляющего рельса 89. Мотор-редуктор 82 регенерационной тележки 60 с дополнительной подшипниковой опорой 88 закреплены на внутренней стороне центрирующе-поддерживающего блока 80. В коленообразных диффузорах 115, установленных между нагнетательными патрубками дополнительных центробежных вентиляторов 58, 59 и продувочными дефлекторами 61, выходной фланец развернут относительно входного на 90°, а на выходе из диффузоров 115 установлены направляющие лопатки 62. Механизм управления регенерацией фильтровальных рукавов 70 снабжен двумя линейками позиционирования 116, установленными на боковых стенках 91 камеры очищенного воздуха 17 по всей длине основной пылеулавливающей камеры 9 и имеющими прерыватели движения (отверстия) 117, выполненные с шагом расположения рядов 65, 66 фильтровальных рукавов 12, а также блоком управления (на чертежах не обозначен) электродвигателя мотор-редуктора 82, выполненным со встроенным электромагнитным тормозом и двумя оптическими датчиками 118, 119, установленными на регенерационной тележке 60 с возможностью их взаимодействия с прерывателями движения (отверстиями) 117 линеек позиционирования 116 и обеспечивающими режим шагового перемещения регенерационной тележки 60 с точным позиционированием продувочных дефлекторов 61 при ее остановке над продуваемым рядом 67 фильтровальных рукавов 12 обеих секций 13, 14 основной пылеулавливающей камеры 11, а также продувку фильтровальных рукавов 12 при остановленной регенерационной тележке в течение заданного времени, устанавливаемого в зависимости от начального пылесодержания в подводящих трубопроводах загрязненного воздуха 15 перед входной камерой 16 фильтра.Each purge deflector 61 has a smaller total area of the outlet openings 85 of the nozzle nozzles 63 than the area of the inlet 84 of the purge deflector, which creates a blockage of the air flow when it exits the nozzle nozzles and, together with a variable cross-section of the deflector, provides the same rate of exit of air from all nozzle nozzles 63, the cleaned air chamber 17 is provided with a support-guide rail 89 mounted along the longitudinal axis of the inspection corridor 8. To ensure the rigidity of said odderzhivayusche-guide rail 89 installed inside the rail with a certain step jumper 90 of channel. A gear rack 86 is fixed to said support-guide rail to form a gearing with the gear gear 83 of the geared motor. To eliminate the deflection of the regeneration carriage 60 from the weight of additional fans 58 and 59 installed in the center of the carriage 60, as well as to ensure constant and high-quality engagement of the gear gear 83 with the gear rack 86 during the movement of the regeneration carriage 60, the latter is equipped with four supporting devices 76, which are made in the form suspension bearings 77, in which supporting ball bearings 79 are cantilevered on horizontal axles 78. Centering 79 and supporting 76 devices are arranged in pairs about in two centering-supporting blocks 80, which are fixed on the ends of the regeneration trolley 60 in the direction of its movement with the centering ball-bearing rollers 75 covering the free outer side surfaces of the supporting rail 89 and forming a transport gap between them (not shown in the drawings), and ball-bearing rollers 79 supporting regeneration trolley devices 76 are located in

-shaped running rails of said supporting-guide rail 89. The gear motor 82 of the regeneration carriage 60 with an additional bearing support 88 is fixed on the inside of the centering-supporting block 80. In the knee-shaped diffusers 115 installed between the discharge pipes of the additional centrifugal fans 58, 59 and the purge deflectors 61, the output flange is rotated 90 ° relative to the inlet, and guide vanes 62 are installed at the outlet of the diffusers 115. Regeneration control mechanism The filter bags 70 is equipped with two positioning lines 116 mounted on the side walls 91 of the cleaned air chamber 17 along the entire length of the main dust collecting chamber 9 and having movement stoppers (openings) 117 made with a pitch of rows 65, 66 of filter bags 12, as well as a block control (not shown in the drawings) of the electric motor of the gear motor 82, made with an integrated electromagnetic brake and two optical sensors 118, 119 mounted on the regeneration trolley 60 with the possibility their interaction with the motion interrupters (holes) 117 of the positioning rulers 116 and providing the mode of stepwise movement of the regeneration carriage 60 with the exact positioning of the purge deflectors 61 when it stops above the purge row 67 of the filter bags 12 of both sections 13, 14 of the main dust collecting chamber 11, as well as the purge filter bags 12 when the regeneration trolley is stopped for a predetermined time, set depending on the initial dust content in the supply pipelines tied air 15 in front of the inlet chamber 16 of the filter.

-образного кронштейна 120, установленного на торце регенерационной тележки 60 и бесконтактно охватывающего линейку позиционирования 116 по оси расположения отверстий. При совмещении вертикального инфракрасного луча с отверстием 117 линейки позиционирования 116 луч попадает на оптический датчик и электрическая цепь замыкается. При замыкании электроцепи поступает сигнал к электродвигателю мотор-редуктора 82 регенерационной тележки 60 на его выключение.Each of the optical sensors 118, 119 is provided with an infrared emitter 147. An optical sensor and an infrared emitter are located inside

-shaped bracket 120 mounted on the end of the regeneration trolley 60 and non-contacting covering the positioning line 116 along the axis of the holes. When the vertical infrared beam is combined with the hole 117 of the positioning ruler 116, the beam hits the optical sensor and the circuit is closed. When the circuit is closed, a signal is sent to the electric motor of the gear motor 82 of the regeneration trolley 60 to turn it off.

The power supply to the geared motor 82 and the electric motors of the additional centrifugal fans 58, 59 installed on the regeneration trolley 60 is carried out when it is moved from the control cabinet 139 through an overhead cable 94, mounted on the undercarriage 93 of the sliding rail device 92, which is installed on the ceiling beams 95 cleaned air chambers 17 above the inspection corridor 8 located on the central platform 4 between sections 13, 14 of the filter bags 12.

To move the electric cable 94 behind the regeneration trolley 60 when it moves on the regeneration trolley 60, a steel rod 96 is pivotally mounted pivotally connected to the extreme running trolley 26 of the sliding rail device 92. In the left extreme position of the regenerating trolley 60, the running trolleys 93 are located at a small step, and the steel rod 96 is inclined to the horizontal plane from left to right. In the right extreme position of the regeneration carriage 60, the electric cable 94 is stretched and the pitch of the carriage 93 is increased, while the steel rod 96 is tilted to the horizontal plane from right to left.

An additional air purification module 20 is installed under the left platform 5 of the horizontal partition 2, is hermetically connected to the rear end wall 11 of the main dust collecting chamber 9, and is composed of four panels 21 of pocket air filter cells 22 of the type ФЯК installed in parallel on two panels on both sides of the inspection corridor 24 chambers of additionally purified air 23. At the same time, each panel 21 of air cell filters is double-row with an additional one chamber in each row of dust collecting individual section of cellular air filters. So, on one side of the inspection corridor 24 there are individual additional dust collection chambers 36, 37 (Fig. 3), 40, 41 (Fig. 4) with sections of the FSC 28, 29, 32, 33 (Fig. 1), and on the other side inspection corridor 24 — individual additional dust collection chambers 38, 39 (FIG. 3), 42, 43 (FIG. 4) with sections of the FAC 30, 31, 34, 35 (FIG. 1). The control mechanism for the regeneration of the panels of air cell filters (FC) 98 is equipped with a timer (not shown in the drawings) to limit the time of the dust accumulation cycle in the panels of the FC.

In addition, two collectors 97 are installed in the cleaned air chamber 17 for outputting cleaned air, connected to openings (not shown in the drawings) in the left platform 5 of the horizontal partition 2, at the outlet of which two air distribution devices 18, 19 are installed in the additionally cleaned air chamber 23 having one inlet and two distributing tees with outlet openings of square cross section connected through air ducts 48 to additional dust collection chambers. So, the air distribution device 18 has distributing tees 44 (FIG. 3) and 46 (FIG. 4), and the air distribution device 19 respectively distributing tees 45 (FIG. 3) and 47 (FIG. 4).

The purified air enters the additional dust collection chambers 36, 37, 38, 39, 40, 41, 42, 43 from the tees 44, 45, 46, 47 through the air ducts 48, which are located between the panels of the air mesh filters 21 on both sides of the inspection corridor 24 chambers of additionally purified air 23. The mechanism for controlling the regeneration of panels of air cell filters 98 is made of 16 controlled dampers:

- eight shutters 99, 100, 101, 102, 103, 104, 105, 106 are installed at the entrance to the chambers of additional dust collection;

- eight shutters 107, 108, 109, 110, 111, 112, 113, 114 are installed at the outlet of the additional dust collection chambers.

The collector for the output of contaminated purge air 121 is made in the form of four collecting tees 122, 123, 124, 125, the inlet openings of which are connected to the holes for the output of contaminated purge air (not shown) from the additional dust collection chambers 36, 37, 38, 39, 40 , 41, 42, 43, and the assembled sections of the tees are connected to the inlet openings of the branches of the fifth and sixth collecting tees 126, 127, the outlet openings of which are connected by an air duct 128 to the inlet of the centrifugal purge fan 69, which together with the first mechanism 98 regeneration control panels of cellular air filter 22 and the timer time limit pylenakopleniya in panels of cellular air filter PF provides automatic regeneration by sections of cellular air filter 22 during continuous clock air cleaning without disconnecting the filter from the process equipment. At the same time, the discharge pipe of the centrifugal purge fan 69 is connected by an air duct 129 to the hole 130 in the end face 132 of the filter hopper 51.

To reduce the number of control signals by controlled air dampers 107-114 in each additional dust collection chamber, the upper and lower controlled air dampers are rotated 90 ° between each other, and their electric drives are controlled by one control signal. So, in the additional air purification module, the controlled flaps 99 and 107, 100 and 108, 101 and 109, 102 and 110, 103 and 111, 104 and 112, 105 and 113, 106 and 114 are rotated relative to each other. Accordingly, they are controlled one by one a control signal and electric drives of said controlled dampers.

The holes of the positioning rulers 116 are located opposite the longitudinal axes of the blown rows 146 of filter bags 12.

Optical sensors 118 and 119 are mounted on the regeneration trolley 60 on brackets 120 having adjustment grooves that allow the brackets 120 to be displaced along with optical sensors and infrared emitters perpendicular to the longitudinal axis 145 of the regeneration trolley by the stick out Δ out _. regeneration trolley 60, which occurs during braking of the electric motor of the gear motor 82, and to shift the optical sensors between themselves by a value of 2Δ SEL _. in the direction of movement of the cart.

The main dust collection chamber 9 and the additional air purification chamber 23 are provided with safety doors 133 and 134. The recirculation duct 50 is equipped with a winter / summer valve 140, 141. The valve 140 is normally open and the valve 141 is normally closed. At the outlet of the valve 141, a square bend 142 is installed, turned downward by an open hole 143 and communicating with the atmosphere. When the summer season begins, the valve 140 closes and the valve 141 opens, providing air to be discharged from the filter by the fan 49 through the opening 143 of the outlet 142 into the atmosphere. The recirculation duct 50 and conduit 129 for supplying contaminated purge air to the hopper 51 are equipped with throttles 144 and 131 for outputting the main 49 and purge 69 fans to the design modes. The chambers of purified air 17 and additionally purified air 23 are equipped with inspection entrance doors 136, 25. Entrance to the chambers 17 and 23 through these doors is carried out from platforms 137, 138.

The captured dust discharged from the filter hopper 51 enters the Greynwood closed-type scraper chain conveyor 135, which feeds it to a storage container (not indicated in the drawings).

To ensure fire safety, the filter is equipped with standard systems:

- filter grounding;

- prevention of dust accumulation in the bunker part of the filter;

- detection of dust fire in the filter and fire fighting;

- fire retention in the event of a fire in the filter to prevent fire from entering the air distributor installed in the workshop and transport pipelines.

The aforementioned fire safety systems in the filter are not considered in the claimed solution.

The bag filter can operate in three modes.

1. All filter bags 12 and sections 28-35 of the panels of the air cell filters 22 are in the filtering mode.

2. Regular stepwise regeneration of the filter bags 12 of the dust chamber 11 is carried out by back-flushing the bags with purified air using additional centrifugal fans 58, 59 located on the regeneration trolley 60, through the purge deflectors 61 provided with nozzle nozzles 63. The blown row of bags 67 is regenerated through the nozzle nozzles 63 when the regeneration trolley 60 is stopped.

3. Regeneration mode of the panels 21 of the air cell filters 22 by reverse sectional purging of the air cell filters with additionally purified air using a purge fan 69 in the suction mode.

Modes 1, 2 and 3 are carried out with continuous air purification around the clock, i.e. with working technological equipment. After the filter is brought to the equilibrium dusty state of the filter cloths of the sleeves 12 and air cell filters 22, the filter is turned on for continuous round-the-clock air purification. This turns on:

- a timer for the implementation of the air filtration mode with filter bags 12;

- a timer for limiting the duration of the dust accumulation cycle in the cells of the FC.

The filter in the filtering mode (Fig. 2) works as follows. Contaminated air containing wood grinding dust and to be cleaned from the supply piping 15 enters the upper part of the inlet chamber 16, which performs the function of a dust settling chamber. The air flows down and enters the hopper 51 and further into the dust collecting chamber 9, in which vertically located filter frame sleeves 12 with an external working surface are placed. In this case, dust particles larger than 150 μm are separated from the air in the inlet chamber 16 and fall out in the filter hopper 51. Air dusted with small particles with sizes less than 150 microns enters the area of the filter bags 12. At the same time, air passes through the fabric of the bags along their entire height and enters through the open part of the bags 12 into the purified air chamber 17.

Since the sleeves 12 are made of their glazed polyester, which does not hold the dust layer on its working surface, the dust flows from the sleeves and is lowered into the hopper 51, from which the scraper chain conveyor 52 is removed through the discharge opening 53 and the lock gate 55 into the scraper chain conveyor 135 of the closed the type that transfers dust to the storage container (not indicated in the drawings). A small part of the dust remains inside the filter cloth of the sleeves. In filtering mode:

- open controlled air dampers 99-106 installed at the entrance to the chambers of additional dust collection 36-43;

- closed controlled air flaps 107-114 installed at the outlet of the chambers of additional dust collection 36-43.

Purified air in the sleeves 12, the air containing wood particles smaller than 10 microns in size, from the chamber 17 enters the additional air purification module 20, in particular, enters the additional dust collection chambers 36-43 through the collectors 97, air distributors 18, 19 and tees 44-47.

From the additional dust collection chambers 36-43 (Figs. 3, 4), additionally purified air passes through sections 28-35 of the panels of the air cell filters 22 with internal frames (not indicated in the drawings) into the chamber of additionally purified air 23 (Figs. 3, 4) , from which through the openings 27 goes into the output manifold of the additionally purified air 56 (Fig. 12).

From the collector 56, additionally purified air is supplied by the main centrifugal fan 49 to the recirculation duct 50.

Moreover, the winter / summer valve 140 is open, and the winter / summer valve 141 is closed. From the recirculation duct 50, additionally cleaned air enters the air distributor installed in the production room (not shown in the drawings). The filter bags 12 of the dust collecting chamber 9 will be in the filtering mode, the estimated time controlled by the time relay, after which the regeneration mode of the bags 12 starts. The duration of the filtering mode, characterizing the length of the break between the regeneration periods, depends on the initial concentration of wood dust Sn, mg / m ³ in the inlet pipelines of polluted air 15 and is installed on a time relay. For the workshops of white grinding C _n = 3000 mg / m ³ , and for the workshops of grinding plywood C _n = 6950 mg / m ³ .

A filter with a three-stage air purification with cleaning coefficients in the inlet chamber η ₁ = 0.5 filter bags η ₂ = 0.999, a panel of air cell filters of the type ФЯК class F8 / F9 of index 8841 η ₃ = 0.98 provides a total coefficient of air purification.

η _1,2,3 = 1- (1-η ₁ ) (1-η ₂ ) (1-η ₃ ) = 1- (1-0,5) (1-0,999) (1-0,98) = 0.99999, the slip coefficient N _1,2,3 = (1-η _1,2,3 ) = 0,00001 and the cleaning efficiency E _1,2,3 = 100η _1,2,3 = 99,9999%.

The second mode of regeneration of the filter bags (cleaning the critically dusted fabric of the bags from dust to an equilibrium dusty state) is carried out by sequentially backwashing first the rows of section 13, and then the rows of section 14 of the filter bags 12 of the dust chamber 9 with purified air when the regeneration trolley 60 is stopped with the nozzle positioning accurately nozzles 63 of the purge deflectors 61 over the purged row 67 of filter bags and a predetermined purge duration. When regenerating the filter bags 12 of section 13, an additional centrifugal fan 58 and an optical sensor 118 operate, and when regenerating the bags of section 14, respectively, an additional centrifugal fan 59 and an optical sensor 119. The regeneration trolley 60 is stopped using optical sensors 118 or 119. When combining an infrared beam with a hole 117 on the positioning ruler 116, the beam enters the optical sensor, after which the electric circuit is closed and a signal is received to the electric motor of the gear motor 82 to turn it off. In this case, the electromagnetic brake built into the electric motor is activated (not shown in the drawings) and the regeneration trolley 60 stops, before stopping it runs out by a value of Δ _SEL. (mm). The trolley run-out is determined experimentally, taking into account the total response time of the optical sensor, magnetic starter and electromagnetic brake (0.05 s) of the electric motor of the gear motor 82 and is set by moving the brackets 120 with optical sensors 118, 119 perpendicular to the longitudinal axis 145 of the regeneration trolley 60. After overrun carriage by an amount Δ _sps. the regeneration trolley 60 is precisely positioned by the nozzle nozzles 63 of the purge deflectors 61 above the purge line 67 of the filter bags. The sleeves are blown by a time relay, which is turned on by the operation of the optical sensor 118 or 119 after combining the infrared emitter beam with the hole 117 of the positioning line 116. Before starting the regeneration of the filter bags 12 of section 13, the regeneration trolley 60 is located on the left platform 5, located above the camera additionally cleaned air 23. At the beginning of the regeneration of the section 13 of the sleeves, the electric motor of the additional centrifugal fan 58 mounted on the regeneration trolley 60, which draws in air from the hopper 51 through the filter bags 12. After the impeller of the centrifugal fan 58 is accelerated, the time of which is set on the time relay, the gear motor 82 of the regeneration trolley 60 is turned on, which moves to the first hole 117 on the left positioning bar 116, located opposite the first number of filter bags. This triggers the optical sensor 118 and the regeneration trolley 60 stops. When the trolley stops, a cycle of purging of the five filter bags of the first row through the nozzle nozzles 63 with purified air by a time relay occurs. After the purge of the first row of hoses of section 13 is completed, the electric drive of the regeneration trolley 60 is turned on, which moves to the next step, after which the trolley stops and the next purge of the hoses occurs. During step-by-step movement, sequential regeneration of the rows of sleeves 12 of the section 13 of the dust chamber 9 occurs. After the regeneration of the filter bags of the last row of the section 13, the regeneration trolley 60 runs onto the right platform 3 located above the inlet chamber 16 until the limit switch closes (not shown in the drawings). In this case, the gear motor 82 of the regeneration carriage 60 and the additional centrifugal fan 58 are turned off, and the additional centrifugal fan 59 is turned on. After the impeller of the fan 59 controlled by the time relay is accelerated, the gear motor 82 is turned on for reverse rotation, which allows the carriage 60 to move in the opposite direction . In this case, according to the above-described scheme, the filter bags 12 of the section 14 are regenerated. After the regeneration of the filter bags of the last row of the section 14 is completed, the regeneration trolley 60 runs onto the left platform 5 located above the chamber of additional purified air 23 until the end switch closes (not shown in the drawings). In this case, the gear motor 82 of the regeneration trolley 60 and the additional centrifugal fan 59 are turned off, and the timer for the filtering mode is also turned on. When the regeneration trolley 60 hits the platforms 5, 3, the side wings 64 of the purge deflectors 61 extend beyond the boundaries of the filter bags, freeing them for the filtration mode.

After the time relay is activated, the filtering mode is terminated and a new cycle of regeneration of the rows of filter bags 12 begins, first of section 13, and then section 14 according to the above scheme. In the regeneration mode, an increased amount of air passes through the filter bags 12 in comparison with the filtration mode, equal to L _Σ = L _AC + L _CR (where L _AC is the capacity of the main centrifugal fan 49 and L _CR is the capacity of one additional centrifugal fan 58 or 59, feeding purge air through deflector 61 to nozzle nozzles 63).

The air cleaned in the sleeves with the help of fans 49, 58 or 59 enters the cleaned air chamber 17. The purge air in the amount of L _pr is supplied by the fans 58 or 59 through the nozzle nozzles 63 of the deflectors 61 to the purge row 67 of the filter bags, and the main part of the air in the amount of L _AC fan 49 is fed through the manifolds 97 entering purified air diffusers 18, 19 of tees 44, 45, 46, 47 and open controlled dampers 99-114 36-43 in the additional dust collecting chamber and further into the section 28-35 of cellular air f ltrov 22 PF-type additional air purification. While the side wings 64 on the purge deflectors 61 overlap adjacent rows of filter bags located one at a time from the blown row of bags. At the same time, filtering in adjacent rows of hoses overlapped by side wings 64 almost completely stops, which ensures normal dust blowing from the filter fabric of the blown row 67 of sleeves and its free flowing into the hopper 51. Blowing filter sleeves 12 through nozzle nozzles 63 when the regeneration trolley 60 is stopped for a predetermined time provides a high quality regeneration hoses for any value of _n initial pylesoderzhaniya C, mg / m ^3, and the energy consumption savings due to reduction etc. duvochnogo air.

Alternately purging the filter bags 12 at the beginning of section 13 with an additional fan 58 and then section 14 with the fan 59 reduces the air load on the filter bags in the regeneration mode, reduces the energy consumption for air purification and increases the cleaning efficiency E,%, in the bags by reducing the filtration rate V _f , m / s.

The third mode of regeneration of the panels of air cell filters 22 of the type ФЯК can be illustrated by the example of figures 1, 2, 3, 4. The operation of the regeneration mechanism of the panels of air cell filters of the ФЯК 68 and the control mechanism of the regeneration of panels of the ФЯК 98 starts when the timer limits the time of the dust cycle on the panels The FFC is reduced to the sequential regeneration of eight sections of the FFC by reverse purging with an additionally purified air centrifugal purge fan 69 in the suction mode. In this case, one of the eight sections of the FCN is regenerated, and the remaining seven sections of the FCN are in the filtering mode.

For example, as applied to a filter with a capacity of L _f = L _AC = 42000 m ³ / h. The filter has 8 sections of FAC of index 8841 with a cell capacity of FAC L _FAC = 2000 m ³ / h. In the regeneration mode of the FFK panels, one of the eight FFK sections containing three cells of the FFK is constantly blown, and seven sections containing 21 cells of the FFK simultaneously participate in additional air purification. Thus, the centrifugal purge fan 69 operates with a capacity of _Lp = 3L _FCN = 3 · 2000 = 6000 m ³ / h (where 3 is the number of cells of the FCF in the section), and the filter capacity for additionally purified air in the regeneration mode of the FCF panels will be L _f = L _AC = 21 L _FAC = 21 · 2000 = 42000 m ³ / h.

The centrifugal purge fan operates according to the following recirculation scheme.

When the timer is activated, the centrifugal purge fan 69 is turned on. After acceleration of the impeller of the fan 69 controlled by a time relay, a control signal is supplied to the controlled air flaps 99, 107 of the additional dust collection chamber 36, according to which the upper controlled air damper of the chamber 99 closes and the lower controlled the choke chamber 107 opens. In this case, the purge fan 69 together with the main fan 49 take away contaminated air from the hopper 51 in the amount of L _f = L _AC + L _CR = 42000 + 6000 = 48000 m ³ / h, pull it through the filter bags 12 and remove the cleaned air from the chamber 17 through the collectors 97 into the air distribution devices 18 and 19, which distribute the cleaned air to the seven additional dust collection chambers 37-43. The cleaned air is drawn by fans 49, 69 through seven sections of the PFC 28-35, which turn it into additionally purified air that enters the chamber 23 in the suction mode. From the chamber 23, the additionally cleaned air in the amount of 48,000 m ³ / h is discharged and distributed in two directions . The main centrifugal fan 49 takes from the chamber 23 42000 m ³ / h of additionally purified air and discharges it through openings 27 and the collector 56 into the recirculation duct 50. The purge fan 69 takes from the chamber 23 6000 m ³ / h of additionally purified air, draws it through the section 28 FAC, blowing it on a time relay. When purging the FAC section, the additionally purified air becomes dusty, turning into contaminated purge air, which is removed by the purge fan 69 from the additional dust collection chamber 36 in the suction mode through the tees 122 and 126 and is fed through the suction 128 and discharge 129 pipelines to the hole 130 located at the end face 132 Hopper 51.

Contaminated purge air from the opening 130 enters the filter bags 12, sewn from glazed polyester, from which the dust flows into the filter hopper 51 and together with the main dust is removed from the hopper 51 by an unloading device 52 through a lock gate 55 to a closed-type scraper conveyor 135, which feeds it to a storage container (not shown in the drawings).

After the regeneration time of section 28 of the FCN opens, the upper 99 opens and the bottom 107 of the controlled air flaps of the dust chamber 36 closes and the above cycle is sequentially repeated with the other seven sections of the FCN 29-35 located in the additional dust collection chambers 37-43.

Listed below are the positions of the controlled air dampers (open, closed) during the regeneration of eight sections of the FC.

During the regeneration of the FCS section 28 (Fig. 1), the shutter 99 is closed and the shutter 107 of the additional dust collection chamber 36 is open. At the same time, the upper shutters 100, 101, 102, 103, 104, 105, 106 are open, and the lower shutters 108, 109, 110 are closed , 111, 112, 113, 114 of the remaining seven chambers of additional dust collection 37, 38, 39, 40, 41, 42, 43 (Figs. 3, 4).

During the regeneration of the FCS section 29 (Fig. 1), the shutter 100 is closed and the shutter 108 of the additional dust collection chamber 37 is open. At the same time, the upper shutters 99, 101, 102, 103, 104, 105, 106 are open, and the lower shutters 107, 109, 110 are closed , 111, 112, 113, 114 of the remaining seven chambers of additional dust collection 36, 38, 39, 40, 41, 42, 43 (Figs. 3, 4).

During the regeneration of the FCS section 30 (Fig. 1), the shutter 101 is closed and the shutter 109 of the additional dust collection chamber 38 is open. At the same time, the upper shutters 99, 100, 102, 103, 104, 105, 106 are open, and the lower shutters 107, 108, 110 are closed , 111, 112, 113, 114 of the remaining seven chambers of additional dust collection 36, 37, 39, 40, 41, 42, 43 (Figs. 3, 4).

During the regeneration of the FCS section 31 (Fig. 1), the shutter 102 is closed and the shutter 110 of the additional dust collection chamber 39 is open. At the same time, the upper shutters 99, 100, 101, 103, 104, 105, 106 are open, and the lower shutters 107, 108, 109 are closed , 111, 112, 113, 114 of the remaining seven additional dust collection chambers 36, 37, 38, 40, 41, 42, 43 (Figs. 3, 4).

During the regeneration of the FCS section 32 (Fig. 1), the shutter 103 is closed and the shutter 111 of the additional dust collection chamber 40 is open. At the same time, the upper shutters 99, 100, 101, 102, 104, 105, 106 are open, and the lower shutters 107, 108, 109 are closed , 110, 112, 113, 114 of the remaining seven additional dust collection chambers 36, 37, 38, 39, 41, 42, 43 (Figs. 3, 4).

During the regeneration of the FCS section 33 (Fig. 1), the shutter 104 is closed and the shutter 112 of the additional dust collection chamber 41 is open. At the same time, the upper shutters 99, 100, 101, 102, 103, 105, 106 are open, and the lower shutters 107, 108, 109 are closed , 110, 111, 113, 114 of the remaining seven chambers of additional dust collection 36, 37, 38, 39, 40, 42, 43 (Figs. 3, 4).

During the regeneration of the FCS section 34 (Fig. 1), the shutter 105 is closed and the shutter 113 of the additional dust collection chamber 42 is open. At the same time, the upper shutters 99, 100, 101, 102, 103, 104, 106 are open, and the lower shutters 107, 108, 109 are closed , 110, 111, 112, 114 of the remaining seven chambers of additional dust collection 36, 37, 38, 39, 40, 41, 43 (Figs. 3, 4).

During the regeneration of the FCS section 35 (Fig. 1), the shutter 106 is closed and the shutter 114 of the additional dust collection chamber 43 is open. At the same time, the upper shutters 99, 100, 101, 102, 103, 104, 105 are open, and the lower shutters 107, 108, 109 are closed , 110, 111, 112, 113 of the remaining seven chambers of additional dust collection 36, 37, 38, 39, 40, 41, 42 (Figs. 3, 4).

After the regeneration of the FCS section 35 is completed, the centrifugal purge fan 69 is turned off, and the filtered air filtration mode begins through eight sections of the FCS 28-35, and the timer for limiting the dust accumulation cycle time in the FCS panels starts.

In this case, all the upper controlled air flaps 99-106 are open and all the lower controlled air flaps 107-114 are closed.

The filter has electrical interlocks, according to which:

- when the centrifugal purge fan 69 is on, the gear motor 82 of the regeneration carriage 60 and the electric motors of the additional centrifugal fans 58, 59 are de-energized;

- when the gear motor 82 of the regeneration carriage 60 and the motors of the additional centrifugal fans 58, 59 are turned on, the electric motor of the centrifugal purge fan 69 is de-energized.

The time limit for the dust accumulation cycle T _PNA , h, on the FSC panels, set on the timer, depends on the amount of dust accumulation M _s , kg, in sections 28-35 FAC and is determined from the explosion safety conditions for sectional purging of the cells of the FSC

where [C _P ] is the permissible concentration of dust in the polluted purge air, mg / m ³ , [M _s ] is the mass of dust accumulated in the NFC section, kg, allowed by the LEL. The section consists of three cells of the cell; V _to - the critical volume of air in which during reverse purging of the FFC section with additionally purified air, the highest concentration of dust takes place, m ³ . It is determined from the expression (3); NKPV - lower concentration limit of explosiveness for wood dust, g / m ³ ; NKPV = 12.6 for wood flour; K _s - safety factor for preventing the explosion of the dusty air mixture during the regeneration of the section of the nuclear fuel cell and the probability breakthrough of the spark, K _s = 2.0 ÷ 2.5.

From (1)

where L _CR - the performance of the purge fan, m ³ / h; L _ol = L _c ; L _c is the throughput of the section of the nuclear fuel cell, m ³ / h, L _s = 3L the _{nuclear fuel cell} = 3 · 2000 = 6000 m ³ / h; T _to - the critical time during which there is the greatest dust discharge from the PNF during reverse purging with additionally purified air and the highest concentration of dust С _p , mg / m ³ takes place in the purge air, equal to the LEL, s; L _ol - the performance of the purge fan, m ³ / h, L _ol = 6000 m ³ / h

After substituting (3) in (2) we obtain

The time of dust accumulation on the section of the FCN T _PNK , s, is determined from the expression

where M _s is the mass of dust accumulating in the FF section as a result of filtering the flow of purified air, kg / h

where C _nFNK - the initial concentration of dust at the entrance to the section FK, mg / m ³ , C _nFNK = 1.5; С _кФЯК - final dust concentration at the outlet of the module for additional air purification, mg / m ³ , С _кФЯК = 0.12. After substituting (4) and (6) in (5) and taking into account that L _CR = L _c , we finally obtain the formula for determining the dust accumulation time in the section of the FCN

Example. NKPV = 12.6 g / m ³ , T _k = 12 s, K _s = 2.0, C _nFJAK = 1.5 mg / m ³ , C _kFYAK = 0.12 mg / m ³ ; T _PNA = 15.2 hours

From the above example, it follows that in order to ensure explosion-safe purging of the sections of the nuclear fuel cell, the regeneration of the sections must be carried out every 16 hours, i.e. once in two shifts. The specified time is set on the timer.

For the workshop for grinding plywood at C _n = 6950 mg / m ³

η _1,2 = 1- (1-η ₁ ) (1-η ₂ ) = 1- (1-0,5) (1-0,999) = 0,9995.

C _nFNK = C _n N _1,2 = C _n (1-η _1,2 ) = 6950 · 0.0005 = 3.74 mg / m ³ .

With _kPJAK = С _n N _1,2,3 = С _n (1-η _1,2,3 ) = 6950 · 0.00004 = 0.278 mg / m ³ .

η _1,2,3 = 1- (1-η ₁ ) (1-η ₂ ) (1-η ₃ ) = 1- (1-0,5) (1-0,999) (1-0,092) = 0, 99996.

Here C _n is the initial concentration of dust in front of the filter, mg / m ³ ; N _1,2,3 - dust slip coefficients, respectively, with two-stage and three-stage air purification.

When C _nFJAK = 3.74 mg / m ³ , C _kFJAK = 0.278 mg / m ³ , K _s = 2.0 and T _k = 16 s, the value of T _PNA , h, will be

Thus, regeneration should be carried out every 8 hours or 1 time per shift.

Shown in figure 1-10, the filter for three-stage purification of air from mechanical impurities has a capacity L _f = 42000 m ³ / h The following data were taken as initial data for calculating the indicated productivity: inner diameter of the sleeve d _int = 150 mm, thickness of the filter cloth S _tk = 2 mm, length of the filter sleeve without cuff l _p = 3.4 m, filtration rate in the regeneration mode V _f = 2 m / min The number of hoses in the blown row n _p = 10, the number of hoses blown by one fan, n _p = 5. The number of hoses in one section, covered by a regeneration trolley, n _pc = 30.

In the module for additional air purification, 4 double-row FCN panels are installed, consisting of eight sections of cells of the FCF of class F8 / 9 (EU8 / 9) of index 8841 with an efficiency of E = 92% and a capacity of L _FCL = 1750 ÷ 2000 m ³ / h.

Based on the given initial data, the following parameters were obtained.

1. The filtering area of one sleeve with a bottom

F _pi = πd _n l _p + 0.785d ² _bottom = 3.14 · 0.154 · 3.4 + 0.785 · 0.146 ² = 1.644 + 0.0167 = 1.6607 m ²

2. The filtering area of one section of the sleeves

F _cp = n _pc; F _pi = 30 · 1.6607 = 49.821 m ²

3. Air flow through one section of the sleeves

L _c = F _av · V _f = 49.821 · 2.0 = 99.642 m ³ / min = 5978.5 m ³ / h ≅ 6000 m ³ / h

4. The number of sections of the sleeves in the filter

n _c = L _f / L _c = 42000/6000 = 7 sections

5. The number of sleeves in the filter

n _pΣ = n _with n _pc = 7 · 30 = 210 hoses

6. The number of cells of the FAC in the module for additional air purification

n _{FAC Σ} = n _{FAC (f)} + n _{FAC (pr)} = L _f / L _FAC + L _pr / L _FAC = _42000/2000 + _6000/2000 = 21 + 3 = 24 cells,

where n _{FAC (f)} ; n _{CFN (pr)} - the number of cells of the FCN participating respectively in the filtering and purging mode.

7. The width of the sheet vertical panels of additionally purified air along the mounting planes with a sheet width of In _l = 642 mm

In _n = In _l · 2 · 24 = 642-48 = 576 mm.

8. The width of two cells of the FAC index 8841 with a clearance for installation

In _2PNF = 2 · 287 + 2 = 576 mm.

9. The distance of the extreme cell of the cell with the outer wall of the chamber 23 in order to eliminate moisture condensation on the material of the cell of the cell

l _clearance = 287 mm.

10. The width of the cell section of the cell with taking into account l _zaz

B _c = 2 · 576 = 1152 mm

11. The width of the air distribution device

In _r.p. = 2 · 576 = 1152 mm

12. The length of the module additional air purification

l _mdo = 2 · V _s + V _r.p. = 2 · 1152 + 1152 = 3456 mm.

13. The length of the dust collection chamber with seven sections of filter bags

l _kn = 7 · l _s = 7 · 576 = 4032 mm,

where l _c = B _p = 576 mm

14. The width of the input chamber

_{H in.k} = 2V _p = 2 · 576 = 1152 mm

15. Filter housing length

l _f = B _in.k + l _kp + l _MDO = 1152 + 4032 + 3456 = 8640 mm

Table 1 shows the parameters of the filter line of various capacities, and in Table 2 the parameters L _f , F _f , V _f in the filtering and bag regeneration modes.

Table 1 L _f , m ³ / h (m ³ / min) Filter bags Extra Cleaning Module Length m Filtration area F _f , m ² n _s n _pc n _pΣ n _c n _fjax n _FAC Add-on module purification, l _MDO Filter housings l _f 42000 (700) 7 thirty 210 8 3 24 3456 8640 350 36000 (600) 6 thirty 180 8 3 24 3456 8064 300 30000 (500) 5 thirty 150 8 3 24 3456 7488 250 24000 (400) four thirty 120 8 2 16 3456 6912 200

table 2 Parameters L _f , F _f , V _f in the filtration and regeneration of the sleeves (FC) Filter index Modes Filter bags Hose regeneration, FNC regeneration L _f , m ³ / h (m ³ / min) F _f , m ² _F V (m / min) L _f , m ³ / h (m ³ / min) F _f , m ² V _f (m / min)

42000 (700) 350 2.0 43,500 (725) 300 2,4 48000 (800) 350 2.25

36000 (600) 300 2.0 37500 (625) 250 2.5 42000 (700) 300 2,3

30000 (500) 250 2.0 31500 (525) 200 2.6 36000 (600) 250 2,4

24000 (400) 200 2.0 25500 (425) 150 2,8 30000 (500) 200 2.5

Example of designation of filter type FRO-FJAON

where 30 is the number of filter bags in one bag section, covered by a regeneration trolley, 7 is the number of filter bags in the filter, 30 × 7 = 210 is the total number of filter bags in the dust chamber of the filter, FRO is a bag filter with regeneration of filter bags by reverse purging air by means of a regeneration trolley, ФЯОН - a module for additional air purification from panels of air cell filters of the ФЯК type with regeneration of ФЯК panels in the form of section-by-section reverse purge but purified air during continuous (n) round-the-clock air purification, 3 - the number of cells of the cell in the module, 8 - the number of sections of cells in the module, 3 × 8 = 24 - the total number of cells in the module of additional cleaning.

All of the above, including a description of the operation of the filter, confirms the possibility of its use in industry with obtaining high technical indicators in comparison with the known filter designs. In addition, both in the sources of patent and scientific and technical information, and in industry, such a design did not occur, which indicates that the proposed solution meets the criteria of the invention.

Claims (4)

1. Bag filter for three-stage air purification from mechanical impurities, comprising a housing with a horizontal partition having perforated sections, a main dust collecting chamber containing front and rear end walls and two sections of vertically arranged frame filter bags fixed with upper open ends on perforated sections of the horizontal partition at least one inlet pipe for polluted air, an inlet chamber for introducing polluted air, a chamber o of the searched air, an additional air purification module, comprising at least one horizontally mounted panel of air cell filters of the type ФЯК, an additional dust collection chamber and an additional purified air chamber, a main centrifugal fan and a recirculation duct, a hopper installed under the filter bags and an inlet chamber, having an unloading device and a lock gate, a collector for outputting additionally purified air, connected at the inlet through a collecting tee with a hole with openings in the chamber of additionally purified air and at the outlet with the suction pipe of the main centrifugal fan, the discharge pipe of which is connected to the recirculation duct, a filter bag regeneration mechanism comprising an additional centrifugal fan, a filter bag regeneration control mechanism, wherein the horizontal partition is made of right, central and left platform, the central of which contains two perforated sections located on both sides of it with to the inspection corridor located between them, the main dust collection chamber is located under the central platform, the inlet chamber is installed under the right platform of the horizontal partition with hermetic connection to the front end wall of the main dust collection chamber, the cleaned air chamber is located under the horizontal partition, the additional air purification module is installed above the left platform horizontal partitions with hermetic connection to the rear end wall of the main dust the filling chamber and is made of four panels of air cell filters equipped with internal wire frames, with the formation of eight individual dust collecting chambers below the panels and the installation of additional purified air chambers on top of the panels, which is equipped with an inspection corridor and an inspection door located between the panels of air cell filters, of which a double-row is made with an arrangement in each of its rows of one additional dust collection chamber with an individual an ideal section of air cell filters, the additional air purification module is equipped with manifolds for introducing purified air into the additional dust collection chambers and for removing contaminated purge air from them, air distribution devices and regeneration mechanisms for controlling the air cell filter panels, and cleaned air inlet manifolds for the additional air purification module are installed in the chamber of purified air and connected at the outlet to the air distribution device mi, each of which has one entrance and two distributing tees of square cross section, connected at the outlet through the air ducts with additional dust collection chambers, with the entrance to them between the panels of air cell filters on both sides of the inspection corridor of the chamber of additional purified air, the mechanism of regeneration of filter bags equipped with a second additional centrifugal fan, the filter bag regeneration control mechanism is equipped with a regeneration trolley placed in the cleaner chamber air with a gear motor installed on it with an integrated electromagnetic brake and a drive gear mounted on an additional spline shaft installed in the hollow output spline shaft of the gear motor and having an additional bearing support, a gear rack mounted on a support-guide rail placed along the center of the inspection corridor of the central platform with the formation of rack gearing of the drive gear of the gear motor with the gear rack, a sliding rail device along with running trolleys for maintaining the electric cable installed on the beams of the ceiling of the cleaned air chamber above the inspection corridor of the central platform, and two positioning rulers installed on the side walls of the cleaned air along the entire length of the main dust collecting chamber and having motion interrupters made in the form of rulers apertures with a pitch of the filter bags and the motor control unit of the gear motor, made with two optical sensors installed on the regeneration trolley with the possibility of their interaction with the breakers of the positioning line and providing the mode of stepwise movement of the regeneration trolley with precise positioning of the purge deflectors when it stops above the purge row of filter bags of both sections of the main dust collecting chamber, as well as purge of the filter bags with the regeneration cart stopped during the set time set on the time relay, additional centrifugal valves Orors of the filter bag regeneration mechanism are mounted on the regeneration carriage according to the PR180 ° and Л180 ° scheme with the location of their discharge nozzles in the center of the carriage and connection to them through knee-shaped diffusers of purging deflectors of variable cross-section, having side wings and a bottom with nozzle purging nozzles, which are made with overlapping them of three rows of filter bags of both bag sections with the middle row of filter bags purged with the regeneration trolley stopped and behind replicated on it with the formation of a transport gap between the nozzle purge nozzles of the purge deflectors and the open ends of the filter bags, the regeneration mechanism of the air cell filter panels contains a centrifugal purge fan for sectional purging of the air cell filter panels with additionally purified air in the suction mode, the mechanism for controlling the regeneration of the air cell filter panels made of a dust accumulation cycle time limit timer in air panels x cell filters and sixteen controllable air dampers installed on the air ducts, which are placed at the inlet of the cleaned air into the additional dust collection chambers and at the exits from them of the polluted purge air, the collector of the polluted purge air outlet is made in the form of four collecting tees, the inlet openings of which are connected to the openings the output of contaminated purge air from the chambers of additional dust collection, and prefabricated sections of the tees are connected to the inlet openings and branches of the fifth and sixth collecting tees, the outlet openings of which are connected to the suction inlet of the centrifugal purge fan, which, together with the control air dampers and the timer for limiting the dust collection cycle in the panels of cell air filters, provides automatic sectional regeneration of the panels of cell air filters with continuous round-the-clock air purification without shutting down process equipment, while the discharge pipe to the centrifugal purge fan is connected by a pipe to the hole in the end of the filter hopper. 2. A bag filter for a three-stage air purification from mechanical impurities according to claim 1, wherein the regeneration trolley is made in the form of a frame having four half shafts with running ball-bearing rollers mounted on them, which are placed in running [-shaped rails mounted on the side walls of the chamber purified air, and is equipped with four centering trolley and four devices supporting it from deflection, the first of which are made in the form of vertical half shafts with centering ball bearings mounted on them bearing rollers, and the second - in the form of suspension bearings with horizontal axles and supporting ball bearings installed on them, the centering and supporting regeneration carts are arranged in pairs in two centering-supporting blocks mounted on the ends of the regeneration cart along its direction, with the centering ball bearings covering them rollers of the free outer side surfaces of the aforementioned centering-supporting rail and the formation of a transport the gap, and the supporting ball bearings are located in the [-shaped running rails of the aforementioned centering supporting rail, while the gear motor together with the additional bearing support are fixed on the inside of one of the centering supporting blocks. 3. The filter bag for a three-stage air purification from mechanical impurities according to claim 1, in which in each additional dust collection chamber the upper and lower controlled air dampers are rotated 90 ° with each other, and their electric drives are controlled by one control signal. 4. The bag filter for a three-stage air purification from mechanical impurities according to claim 1, wherein the nozzle purge nozzles of the purge deflectors of the regeneration carriage are made with a smaller purge area than the area of the purge deflector inlets.

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