CN111362002A

CN111362002A - Pneumatic conveying system for high-temperature air of pulverized coal

Info

Publication number: CN111362002A
Application number: CN202010220447.5A
Authority: CN
Inventors: 李涛; 杨帆; 王超
Original assignee: Jinan Huangtai Coal Gas Stove Co ltd
Current assignee: Jinan Huangtai Coal Gas Stove Co ltd
Priority date: 2020-03-25
Filing date: 2020-03-25
Publication date: 2020-07-03

Abstract

The invention discloses a high-temperature air pneumatic conveying system for pulverized coal, which comprises a pulverized coal bin, wherein the top of the pulverized coal bin is fixedly connected with the bottom of a dust remover, the bottom of the pulverized coal bin is fixedly connected with the top end of a coal pipe, the bottom end of the coal pipe is fixedly connected with the bottom of a gate valve, the bottom of the gate valve is fixedly connected with the bottom of a rotary feeder, the bottom of the rotary feeder is fixedly connected with the top of a feeder, and the right side of the feeder is fixedly connected with the left side of a burner. The high-temperature air pneumatic conveying system for the pulverized coal adopts high-temperature air as a conveying carrier for extraction through the gate valve, the rotary feeder, the material feeder and the conveying fan, the pulverized coal bin caches external sent pulverized coal, the pulverized coal is quantitatively and uniformly conveyed to the material feeder through the gate valve and the rotary feeder, the conveying fan extracts high-temperature air after heat exchange, the conveying fan carries the pulverized coal to enter the annular air chamber through hot air conveying, and the annular air chamber tangentially or tangentially enters the burner.

Description

Pneumatic conveying system for high-temperature air of pulverized coal

Technical Field

The invention relates to the technical field of pneumatic transmission, in particular to a high-temperature pneumatic pulverized coal transmission system.

Background

Pneumatic conveying, also known as air flow conveying, is a specific application of fluidization technology, which utilizes the energy of air flow to convey granular materials in an enclosed pipeline along the direction of the air flow. The pneumatic conveying device has simple structure and convenient operation, can be used for horizontal, vertical or inclined conveying, and can simultaneously carry out physical operations or certain chemical operations such as heating, cooling, drying, airflow classification and the like on materials in the conveying process. Compared with mechanical conveying, the method has the disadvantages of large energy consumption, easy damage to particles and easy abrasion of equipment. Materials with high water content, adhesion or easy generation of static electricity during high-speed movement are not suitable for pneumatic transmission. The pneumatic conveying is mainly characterized by large conveying capacity, long conveying distance and high conveying speed; it is possible to charge at one location and then discharge at multiple locations. Pneumatic conveying can be roughly divided into two types, suction type and pressure type, according to the working principle. The suction-delivery type pneumatic conveying is that the air and material are sucked into the pipeline together and conveyed by the low-pressure air flow, so it is also called vacuum suction-delivery. The pressure-feed pneumatic conveying is to convey the material by pushing the material with compressed air higher than atmospheric pressure. The existing pulverized coal is pneumatically conveyed by cold air, cannot be effectively preheated, and needs to be solved urgently.

Disclosure of Invention

The invention aims to provide a high-temperature air pneumatic conveying system for pulverized coal, which aims to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a fine coal high temperature air pneumatic conveying system, includes the pulverized coal storehouse, pulverized coal storehouse top fixed connection dust remover bottom, pulverized coal storehouse bottom fixed connection coal pipe top, coal pipe bottom fixed connection push-pull valve bottom, push-pull valve bottom fixed connection rotary feeder bottom, rotary feeder bottom fixed connection awards the glassware top, award glassware right side fixed connection jet burner left side, award glassware left side fixed connection tuber pipe right-hand member, tuber pipe left end fixed connection delivery fan right side.

Preferably, the dispenser includes protective housing, first belt pulley, turbofan frame, main part, turbofan, bearing, pivot, belt, second belt pulley, air brake and motor, top fixed connection air brake one side in the main part, left side outer wall fixed connection protective housing bottom in the main part, protective housing left side fixed connection motor right side, the first belt pulley of motor fixed connection in the protective housing, be close to the protective housing fixed connection turbofan frame outside in the main part, turbofan frame middle part fixed connection bearing, bearing fixed connection pivot both ends, pivot middle part fixed connection turbofan, pivot left end fixed connection second belt pulley, be provided with the belt between second belt pulley and the first belt pulley, first belt pulley passes through belt swing joint second belt pulley.

Preferably, the left side of the conveying fan is fixedly connected with the right side of the heater, and the conveying fan is a WSR Roots fan.

Preferably, the heater includes expansion mouth, heating shell, motor, mount, fan, dust separation net, heater strip, base and steel hose, heating shell fixed connection expansion mouth, be close to expansion mouth fixed connection mount both sides in the heating shell, mount middle part fixed connection motor, motor right side fixed connection fan, be close to fan right side fixed connection dust separation net in the heating shell, be close to dust separation net right side fixed connection heater strip in the heating shell, heating shell right side fixed connection steel hose, steel hose right side fixed connection conveyor fan.

Preferably, be close to top fixed connection dust separation funnel top in the fly ash storehouse, the fixed ring top that drops in dust separation funnel bottom, it is close to top fixed connection dust separation swash plate to drop the intra-annular, it is close to dust separation swash plate bottom fixed connection heating pipe one end to drop the ring outside, heating pipe other end fixed connection air heater, the air heater right side fixed connection fly ash storehouse outside, fly ash storehouse top fixed connection water tank bottom, the bottom is provided with the water pump in the water tank, water pump fixed connection water pipe one end, water pipe other end fixed connection atomizing disk.

Preferably, the atomizing disk is arranged in the pulverized coal bunker and close to the top of the dust separation funnel, and an atomizing nozzle is arranged at the bottom of the atomizing disk.

Preferably, the speed reduction plate and the interlayer inclined plate are both inclined downwards and are in a loop shape.

Preferably, the dust remover is MC24-II, the rotary feeder signal is YJD-16-B, and the burner is MP 80-3.

Preferably, an annular air chamber is arranged between the material feeder and the spraying device, and the annular air chamber is provided with a tangential or tangential air inlet.

Compared with the prior art, the invention has the beneficial effects that:

1. the high-temperature air pneumatic conveying system for the pulverized coal adopts high-temperature air as a conveying carrier for extraction through the gate valve, the rotary feeder, the material feeder and the conveying fan, the pulverized coal bin caches external sent pulverized coal, the pulverized coal is quantitatively and uniformly conveyed to the material feeder through the gate valve and the rotary feeder, the conveying fan extracts high-temperature air after heat exchange, the conveying fan carries the pulverized coal to enter the annular air chamber through hot air conveying, and the annular air chamber tangentially or tangentially enters the burner.

2. This fine coal high temperature air pneumatic conveying system has changed the drawback that traditional cold air carries the buggy and brings a large amount of cold air into furnace through the burner that sets up, and high temperature air pneumatic conveying has realized the preheating of coal-fired equipment fuel and has carried and burn, has very big improvement to the ignition combustion operating mode of the fuel that anthracite, meager coal, carbon residue and many ash fusion points of ash are higher again especially, to the high efficiency of inferior coal, clean utilization has great meaning.

3. The utility model provides a pulverized coal high temperature air pneumatic conveying system is through the turbofan that sets up, and the pulverized coal of granting the glassware slows down through the air brake, and motor work drives first belt pulley work, drives second belt pulley work through the belt, finally drives the fast-speed rotation of turbofan, will form the vortex through the high temperature air of conveying fan, further carries out the speeding to reach the pneumatic conveying purpose of change.

4. The utility model provides a fine coal high temperature air pneumatic conveying system is through atomizing disk and the dust separation funnel that sets up, and the water of water pump in with the water tank leads to pipe and carries to atomizing disk, reaches the fine coal dust in the fine coal cabin when unloading through the atomizing nozzle blowout and atomizes the dust fall, descends to the dust separation funnel and slows down through the dust separation swash plate, will dry through the moist fine coal dust of atomizing dust fall through the air heater at last to reach the operating pressure who further alleviates the dust remover.

5. The utility model provides a fine coal high temperature air pneumatic conveying system is through the heater strip that sets up, and the fan inhales the outside air through the expansion mouth, separates the dust through the dust separation net, carries out rapid heating with inspiratory outside air through the heater strip, forms high temperature air, and steel hose can adjust the junction.

Drawings

FIG. 1 is a schematic view of the present invention conveying system;

FIG. 2 is a schematic view of the internal structure of the heater;

FIG. 3 is a schematic view of the internal structure of the left side of the feeder taken;

FIG. 4 is a schematic view of the top and internal structure of the pulverized coal bunker;

fig. 5 is a schematic view of the bottom structure of the atomizing disk.

In the figure: 1 dust remover, 2 pulverized coal bunker, 3 coal pipe, 4 gate valve, 5 burner, 6 feeder, 601 protective shell, 602 first belt pulley, 603 turbo fan frame, 604 main body, 605 turbo fan, 606 bearing, 607 rotating shaft, 608 belt, 609 second belt pulley, 610 speed reduction plate, 611 motor, 7 air pipe, 8 conveying fan, 9 heater, 901 expanding opening, 902 heating shell, 903 motor, 904 fixing frame, 905 fan, 906 dust isolating net,

heating wire

907, 908 base, 909 steel hose, 10 water tank, 11 water pump, 12 heating pipe, 13 dust isolating inclined plate, 14 hot air blower, 15 water pipe, 16 dropping ring, 17 atomizing disk, 18 dust isolating funnel, 19 atomizing nozzle, 20 rotary feeder.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-5, the present invention provides a technical solution: a high-temperature air pneumatic conveying system for pulverized coal comprises a pulverized coal bin 2, wherein the top of the pulverized coal bin 2 is fixedly connected with the bottom of a dust remover 1, the bottom of the pulverized coal bin 2 is fixedly connected with the top end of a coal pipe 3, the bottom end of the coal pipe 3 is fixedly connected with the bottom of a gate valve 4, the bottom of the gate valve 4 is fixedly connected with the bottom of a rotary feeder 20, the bottom of the rotary feeder 20 is fixedly connected with the top of a feeder 6, the right side of the feeder 6 is fixedly connected with a burner 5, the left side of the feeder 6 is fixedly connected with the right end of an air pipe 7, the left end of the air pipe 7 is fixedly connected with the right side of a conveying fan 8, the model of the dust remover 1 is MC24-II, the rotary feeder 20 is YJD-16-B, the model of the burner 5 is MP80-3, an annular air chamber is arranged between the, The device comprises a material feeder 6 and a conveying fan 8, high-temperature air is extracted and adopted as a conveying carrier, the powdery solid fuel is conveyed in a remote pneumatic mode, the pulverized coal sent from the outside is cached in a pulverized coal bin 2, the pulverized coal is quantitatively and uniformly conveyed to the material feeder 6 through a gate valve 4 and a rotary feeder 20, the conveying fan 8 extracts high-temperature air after heat exchange, the conveying fan 8 conveys the pulverized coal with hot air to enter an annular air chamber, the annular air chamber enters a burner 5 tangentially or tangentially, the defect that a large amount of cold air is brought into a hearth by the conventional cold air conveying pulverized coal is overcome through the arranged burner 5, the preheating conveying and burning of the fuel of coal burning equipment are realized through the high-temperature pneumatic conveying of the air, the ignition and burning working conditions of the fuel with high melting points of anthracite, lean coal, residual carbon and ash are greatly improved, and the high-efficiency and the clean utilization of the inferior coal are significant, the inside of a pulverized coal bin 2 is close to the top of a dust-separation funnel 18 fixedly connected with the top of the pulverized coal bin, the bottom of the dust-separation funnel 18 is fixedly connected with the top of a falling ring 16, the inside of the falling ring 16 is close to the top of a dust-separation sloping plate 13 fixedly connected with one end of a heating pipe 12, the outer side of the falling ring 16 is close to the bottom of the dust-separation sloping plate 13, the outer side of the falling ring 16 is close to one end of the dust-separation sloping plate 13 fixedly connected with the bottom of the dust-separation sloping plate 13, the outer side of the heating pipe 12 is fixedly connected with an air heater 14, the right side of the air heater 14 is fixedly connected with the outside of the pulverized coal bin 2, the top of the pulverized coal bin 2 is fixedly connected with the bottom of a water tank 10, the bottom of the water tank 10 is provided with a water pump 11, the, the feeder comprises a protective shell 601, a first belt pulley 602, a turbofan 603, a main body 604, a turbofan 605, a bearing 606, a rotating shaft 607, a belt 608, a second belt pulley 609, a speed reducing plate 610 and a motor 611, wherein the inner top of the main body 604 is fixedly connected with one side of the speed reducing plate 610, the interlayer plate 610 and the interlayer swash plate 14 are both inclined downwards and form a ring, the outer wall of the inner left side of the main body 604 is fixedly connected with the bottom of the protective shell 601, the left side of the protective shell 601 is fixedly connected with the right side of the motor 611, the motor 611 in the protective shell 601 is fixedly connected with the first belt pulley 602, the inner part of the main body 604 is close to the outer side of the protective shell 601 and is fixedly connected with the turbofan 603, and the bearing 606 is fixedly connected with the middle part of the turbofan 603, the bearing 603 is fixedly connected with two ends of a rotating shaft 606, the middle part of the rotating shaft 606 is fixedly connected with a turbofan 603, the left end of the rotating shaft 606 is fixedly connected with a second belt pulley 609, a belt 608 is arranged between the second belt pulley 609 and the first belt pulley 602, the first belt pulley 602 is movably connected with the second belt pulley 609 through the belt 608, the installed turbofan 605 is used for reducing the speed of pulverized coal through a material distributor 6 through a speed reducing plate 610, a motor 611 works to drive the first belt pulley 602 to work, the belt 608 drives the second belt pulley 609 to work to finally drive the turbofan 605 to rotate at high speed, high-temperature air passing through a conveying fan 8 forms a vortex to further increase the speed so as to achieve the purpose of replacing pneumatic conveying, the left side of the conveying fan is fixedly connected with the right side of a heater, the conveying fan is a WSR Roots fan, the heater comprises an expansion port 901, a heating shell 902, the heating device comprises a fan 905, a dust separation net 906, a heating wire 907, a base 908 and a steel hose 909, wherein an expansion port 901 is fixedly connected to a heating shell 902, two sides of a fixing frame 904 are fixedly connected to the heating shell 902 close to the expansion port 901, a motor 903 is fixedly connected to the middle of the fixing frame 904, a fan 905 is fixedly connected to the right side of the motor 903, a dust separation net 906 is fixedly connected to the right side of the fan 905 in the heating shell 902 close to the dust separation net 906, the heating wire 907 is fixedly connected to the right side of the heating shell 902, the steel hose 909 is fixedly connected to the right side of the steel hose 909, the fan 8 is fixedly connected to the right side of the steel hose 909, the fan 905 sucks in external air through the expansion port 901 through the arranged heating wire 907, dust is isolated through the dust separation net 906, the sucked external air is rapidly heated through.

When in use, the fan 905 sucks in external air through the expanding opening 901, dust is isolated through the dust isolating net 906, the sucked external air is rapidly heated through the heating wire 907 to form high-temperature air, the high-temperature air is extracted to be used as a conveying carrier, the powdery solid fuel is conveyed in a long-distance pneumatic mode, the pulverized coal of the material feeder 6 is decelerated through the decelerating plate 610, the motor 611 works to drive the first belt pulley 602 to work, the belt 608 drives the second belt pulley 609 to work, the turbofan 605 is finally driven to rotate at a high speed, the high-temperature air passing through the conveying fan 8 is formed into a vortex to further accelerate speed, the pulverized coal bin 2 caches the pulverized coal sent from the outside, the pulverized coal is quantitatively and uniformly conveyed to the material feeder 6 through the gate valve 4 and the rotary feeder 20, the conveying fan 8 extracts the high-temperature air after heat exchange, the conveying fan 8 conveys the pulverized coal into the annular air chamber by hot air, the annular air chamber enters the burner 5 tangentially or tangentially, the water in the water tank 10 is conveyed to the atomizing disc 17 by the water pump 11 through the water pipe 15, the atomized dust is reduced by the pulverized coal dust in the pulverized coal bunker 2 when the pulverized coal dust is discharged through the atomizing nozzle 19, the atomized dust is reduced by the atomized dust reduction funnel 18 through the dust-separation inclined plate 13, and finally the atomized dust-reduced wet pulverized coal dust is dried by the air heater 14 to further reduce the working pressure of the dust remover 1.

In summary, the high-temperature air pneumatic conveying system for pulverized coal adopts high-temperature air as a conveying carrier to extract and use the pulverized solid fuel for long-distance pneumatic conveying through the gate valve 4, the rotary feeder 20, the feeder 6 and the conveying fan 8, the pulverized coal bin 2 caches the pulverized coal sent from the outside, the pulverized coal quantitatively and uniformly conveys the pulverized coal to the feeder 6 through the gate valve 4 and the rotary feeder 20, the conveying fan 8 extracts high-temperature air after heat exchange, the conveying fan 8 conveys the pulverized coal with hot air to enter the annular air chamber, and the annular air chamber tangentially or tangentially enters the burner 5.

The burner 5 is arranged, the defect that the traditional cold air conveying pulverized coal brings a large amount of cold air into a hearth is overcome, the high-temperature air pneumatic conveying realizes the preheating conveying and combustion of the fuel of the coal-fired equipment, the ignition combustion working condition of the fuel with high melting point of anthracite, lean coal, carbon residue and ash is greatly improved, and the burner has great significance for high efficiency and clean utilization of the inferior coal.

Through the turbofan 605, the pulverized coal of the material feeder 6 is decelerated through the decelerating plate 610, the motor 611 works to drive the first belt pulley 602 to work, the belt 608 drives the second belt pulley 609 to work, and finally the turbofan 605 is driven to rotate at high speed, high-temperature air passing through the conveying fan 8 forms vortex, and the speed is further increased, so that the purpose of replacing pneumatic conveying is achieved.

Through atomizing disk 17 and the dust separation funnel 18 that set up, water in water tank 10 is carried to atomizing disk 17 through water pipe 15 to water pump 11, reaches the fine coal dust in the fine coal storehouse 2 when unloading through the 19 blowout of atomizing nozzle and atomizes the dust fall, descends to dust separation funnel 18 and slows down through dust separation swash plate 13, will dry through the moist fine coal dust of atomizing dust fall through air heater 14 at last to reach the operating pressure who further alleviates dust remover 1.

Through the arranged heating wire 907, the fan 905 sucks the outside air through the expansion port 901, the dust is isolated through the dust isolating net 906, the sucked outside air is rapidly heated through the heating wire 907 to form high-temperature air, and the steel hose 909 can adjust the joint.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a fine coal high temperature air pneumatic conveying system, includes fine coal storehouse (2), its characterized in that: pulverized coal storehouse (2) top fixed connection dust remover (1) bottom, pulverized coal storehouse (2) bottom fixed connection coal pipe (3) top, coal pipe (3) bottom fixed connection push-pull valve (4) bottom, push-pull valve (4) bottom fixed connection rotary feeder (20) bottom, rotary feeder (20) bottom fixed connection awards glassware (6) top, award glassware (6) right side fixed connection jet burner (5) left side, award glassware (6) left side fixed connection tuber pipe (7) right-hand member, tuber pipe (7) left end fixed connection conveyor fan (8) right side.

2. The pneumatic conveying system for high-temperature air of pulverized coal as claimed in claim 1, wherein: the feeder comprises a protective shell (601), a first belt pulley (602), a turbofan rack (603), a main body (604), a turbofan (605), a bearing (606), a rotating shaft (607), a belt (608), a second belt pulley (609), a speed reduction plate (610) and a motor (611), wherein the top of the main body (604) is fixedly connected with one side of the speed reduction plate (610), the outer wall of the inner left side of the main body (604) is fixedly connected with the bottom of the protective shell (601), the left side of the protective shell (601) is fixedly connected with the right side of the motor (611), the motor (611) of the protective shell (601) is fixedly connected with the first belt pulley (602), the main body (604) is internally close to the outer side of the protective shell (601) and is fixedly connected with the turbofan rack (603), the bearing (606) is fixedly connected with the middle of the turbofan rack (603), the two ends of the rotating shaft (606) are fixedly connected with the middle of the rotating, the left end of the rotating shaft (606) is fixedly connected with a second belt pulley (609), a belt (608) is arranged between the second belt pulley (609) and the first belt pulley (602), and the first belt pulley (602) is movably connected with the second belt pulley (609) through the belt (608).

3. The pneumatic conveying system for high-temperature air of pulverized coal as claimed in claim 1, wherein: the left side of the conveying fan is fixedly connected with the right side of the heater, and the conveying fan is a WSR Roots fan.

4. The pneumatic conveying system for high-temperature air of pulverized coal as claimed in claim 3, characterized in that: the heater comprises an expansion opening (901), a heating shell (902), a motor (903), a fixed frame (904), a fan (905), a dust separation net (906), a heating wire (907), a base (908) and a steel hose (909), the heating shell (902) is fixedly connected with the expansion port (901), the heating shell (902) is internally close to the two sides of the expansion port (901) and fixedly connected with the fixed frame (904), the middle part of the fixed frame (904) is fixedly connected with a motor (903), the right side of the motor (903) is fixedly connected with a fan (905), a dust-proof net (906) is fixedly connected in the heating shell (902) close to the right side of the fan (905), a heating wire (907) is fixedly connected in the heating shell (902) close to the right side of the dust separation net (906), the right side of the heating shell (902) is fixedly connected with a steel hose (909), and the right side of the steel hose (909) is fixedly connected with a conveying fan (8).

5. The pneumatic conveying system for high-temperature air of pulverized coal as claimed in claim 1, wherein: be close to top fixed connection dust separation funnel (18) top in pulverized coal bunker (2), dust separation funnel (18) bottom is fixed and drops ring (16) top, it is close to top fixed connection dust separation swash plate (13) in ring (16) to drop, it is close to dust separation swash plate (13) bottom fixed connection heating pipe (12) one end to drop ring (16) outside, heating pipe (12) other end fixed connection air heater (14), air heater (14) right side fixed connection pulverized coal bunker (2) outside, pulverized coal bunker (2) top fixed connection water tank (10) bottom, the bottom is provided with water pump (11) in water tank (10), water pump (11) fixed connection water pipe (15) one end, water pipe (15) other end fixed connection atomizing disk (17).

6. The pneumatic conveying system for high-temperature air of pulverized coal as claimed in claim 5, wherein: atomizing disk (17) set up and are close to dust separation funnel (13) top in pulverized coal storehouse (2), atomizing disk (17) bottom is provided with atomizing nozzle (19).

7. The pneumatic conveying system for high-temperature air of pulverized coal as claimed in claims 1 and 5, wherein: the speed reducing plate (610) and the interlayer inclined plate (14) are both inclined downwards and are in a ring shape.

8. The pneumatic conveying system for high-temperature air of pulverized coal as claimed in claim 1, wherein: the type of the dust remover (1) is MC24-II, the signal of the rotary feeder (20) is YJD-16-B, and the type of the burner (5) is MP 80-3.

9. The pneumatic conveying system for high-temperature air of pulverized coal as claimed in claim 1, wherein: an annular air chamber is arranged between the material feeder 6 and the gas sprayer 5, and the annular air chamber is provided with a tangential or tangential air inlet.