CN109289323B - A kind of fume treatment double-layered filtering bag - Google Patents
A kind of fume treatment double-layered filtering bag Download PDFInfo
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- CN109289323B CN109289323B CN201811284460.6A CN201811284460A CN109289323B CN 109289323 B CN109289323 B CN 109289323B CN 201811284460 A CN201811284460 A CN 201811284460A CN 109289323 B CN109289323 B CN 109289323B
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- filter cloth
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- inner filter
- outer filter
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/08—Filter cloth, i.e. woven, knitted or interlaced material
- B01D39/083—Filter cloth, i.e. woven, knitted or interlaced material of organic material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0001—Making filtering elements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/42—Auxiliary equipment or operation thereof
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Filtering Materials (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The present invention relates to environment protection fields, and in particular to a kind of fume treatment double-layered filtering bag.The double-layered filtering bag is made of double-layer fabric, the double-layer fabric include outer filter cloth, inner filter cloth and connection inner filter cloth and outer filter cloth between connecting line.Gas pressure sensor is provided between the inner filter cloth and outer filter cloth.Double-layered filtering bag of the invention had both taken full advantage of the pressure of flue gas itself, also increased filter efficiency, while not will cause excessive resistance, and eliminated the filter bag basket structure of labyrinth, only used the filter bag frame of ordinary construction.The filter bag can also simply and easily judge that filter bag with the presence or absence of loophole, is not necessarily to manual inspection.Meanwhile filter bag manufacture craft of the invention is simple, high production efficiency facilitates large-scale industrial production.
Description
Technical field
The present invention relates to environment protection fields, and in particular to a kind of fume treatment double-layered filtering bag.
Background technique
Sack cleaner, electrostatic precipitator and Venturi scrubber are that internationally recognized particle controls three big cleaners.
Under different work condition environments, three big cleaners all respectively have superiority and inferiority and relative superiority or inferiority.Wherein, sack cleaner is three big cleaners
Middle application range is most wide, adaptability is most strong, a kind of highest deduster of purification efficiency.
Existing filter bag is usually filtered using the filter cloth of single layer.The processing is simple for this filter bag, but filter effect one
As, it when service life is not grown, and filter bag has broken hole, needs manually to patrol, heavy workload and is not easy to find.This is straight
Connect the filter efficiency for influencing filter bag.Also there are some filter bags using double-layer structure now, but there is also various for these filter bags
Problem.
Number of patent application discloses a kind of filter bag resistant to high temperature for the utility model patent of CN201720099512.7, including
Bag body, bag body include outer bag body and inner bag, and outer bag body is long compared with inner bag, further include being arranged between outer bag body and inner bag
The components such as cage bone.The high temperature resistance of filter cloth is improved by setting multilayer heat-resisting material.But this double-layered filtering bag needs
Complicated cage bone structure is designed between inner bag and outer bag body, and the active force between inner bag and outer bag body is uneven,
Installation is also inconvenient.It is a kind of for double filter bags that number of patent application is that the utility model patent of CN201620224398.1 discloses
Filter bag cage, number of patent application is that the utility model patent of CN201720763534.9 discloses a kind of Wear-resistant double-layered filtering bag, this kind of
Double medium filtration requires to design the filter bag cage between inner bag and outer bag body, and structure is complicated and is inconvenient to install.Patent Shen
Number a kind of denitration dust collecting integral functionality filter of double-layer structure please be disclosed for 201520019161.5 utility model patent
Bag, which includes outside dedusting filtering bag and inside denitration filter bag, using the fission of outside dedusting filtering bag and inside denitration filter bag
Structure can overcome existing integrated function filtrate dedusting function and denitration function service life not consistent, lead to it
The problem of one function residue wastes.But this split type structure is again such that the active force between ectonexine bag body is uneven, peace
Dress when using also needs that filter bag cage is arranged between interior outer layer bag body, and structure is complicated and is inconvenient to install.In general, existing
The filter bag of double-layer structure in technology is substantially the complicated frame structure of design to support ectonexine bag body respectively, either
Multilayer filter material is fitted closely together, but filtration resistance can be significantly increased in this way, filter efficiency substantially reduces.
Based on the above issues, it is necessary to design a kind of double-layered filtering bag with multiple functions to solve these problems.
Summary of the invention
For the prior art there are above-mentioned technical problem, the present invention provides a kind of fume treatment double-layered filtering bag, the bilayer
Filter bag can adapt to the working environment of fume high-temperature, and active force is uniform between ectonexine, long service life.In addition, the filter bag
Dedusting pressure can also be easily detected, can easily judge filter bag with the presence or absence of loophole.
To achieve the above object, the present invention the following technical schemes are provided:
A kind of fume treatment double-layered filtering bag, it is characterised in that: the double-layered filtering bag is made of double-layer fabric, described double
Shell fabric include outer filter cloth, inner filter cloth and connection inner filter cloth and outer filter cloth between connecting line.
Preferably, in the double-layer fabric, the thickness of outer filter cloth: the thickness of inner filter cloth: the length of connecting line=(1
~2): (1~2): (6~30).It is furthermore preferred that the length of the connecting line is 8-25mm, the outer filter cloth and inside filter
The thickness of cloth is within the scope of 0.5~2mm.So set, connecting line can stretch when filter bag is acted on by flue gas pressures, use
The longer connecting line compared with inner filter cloth or outer filter cloth can form relatively large airflow space.
Preferably, in the double-layer fabric, the distribution density of connecting line is every square decimeter of 30-120 root.So set,
Connecting line can be made to be distributed evenly between inner filter cloth and outer filter cloth, distribution density is appropriate, is both able to maintain inner filter cloth
There is uniform coupling force between outer filter cloth, will not be distributed because of connecting line excessive and smoke filtration is caused to hinder
Hinder.In the use process of filter bag, part dust deposition is had between inner filter cloth and outer filter cloth.If the distribution of connecting line
Density is too low, then the point of the power acted on outer filter cloth by connecting line can be made very few, be easy to cause stress to concentrate, so that outside
The two-end part of connecting line is easily damaged and broken hole occur on side filter cloth and inner filter cloth, and filter effect is caused to decline；If even
The distribution of wiring is overstocked, then can make more dust deposition on connecting line, and influences flue gas and filter in inner filter cloth and outside
The mobility in the space between cloth can also reduce filter efficiency.
Preferably, the connecting line section rounded chemical fibre smooth using surface, as aramid fibre,
Polyphenylene sulfide fibre, polytetrafluoroethylene fibre, polyimide fiber etc..The adhesion amount of flue dust can be reduced in this way.Ordinary circumstance
Under, the connecting line does not select the fragile fibres such as glass fibre.In filter bag preparation process, between inner filter cloth and outer filter cloth
Connecting line can repeatedly bend, filter bag carry out package transport when can also compress inner filter cloth and outer filter cloth, therefore connecting line
Other than requiring the performances such as the higher, high temperature resistant of strength, it is also necessary to certain flexibility.Glass fibre is more crisp, easily broken in bending.
Preferably, the connecting line is using the thick denier chemical fiber monofilament that section is rounded and surface is smooth, fineness 9-
25dtex.Thick denier chemical fiber monofilament is selected, the surface that can avoid passing through the connecting line that more chemical-fibres filaments of twisting are formed has ditch
Slot makes it be not easy to adhere to flue dust.Using the chemical fiber monofilament of thicker circular cross-section, it is possible to reduce the adhesion amount of flue dust.
Preferably, gas pressure sensor is provided between the inner filter cloth and outer filter cloth.It is furthermore preferred that inside
Gas pressure sensor is respectively provided on the outside of the outside of side filter cloth and outer filter cloth.In normal work, flue gas is passing through filter bag
Enter between inner filter cloth and outer filter cloth after crossing inner filter cloth, during this, gas pressure can be reduced, and flue gas passes through later
Outer filter cloth.In other words, pass through the flue gas pressures P1 > inner filter cloth before inner filter cloth and the flue gas between outer filter cloth
Pressure P2 > flue gas passes through the pressure P3 after outer filter cloth.Flue gas pressure when normal work, between inner filter cloth and outer filter cloth
Power P2 can maintain certain section and remain unchanged and (section is denoted as X), when breakage occurs for inner filter cloth and/or outer filter cloth
When, change dramatically or substantial deviation X can occur for the flue gas pressures P2 between inner filter cloth and outer filter cloth, thus can determine whether to filter
Bag occurs damaged.If the flue gas pressures P2 between inner filter cloth and outer filter cloth increased dramatically or the maximum value greater than X,
Judgement is that breakage occurs for inner filter cloth；If the flue gas pressures P2 between inner filter cloth and outer filter cloth can be strongly reduced or small
In the minimum value of X, then judgement is that breakage occurs for outer filter cloth.
Preferably, the double-layer fabric is made into using exchange tissue double-deck in tied double weave, table, or using three-dimensional
Knitting skill weaves.
It is furthermore preferred that being covered with the film with micropore on the outer filter cloth and/or inner filter cloth of the double-layer fabric, formed
The material selection polytetrafluoroethylene (PTFE) of the film.So set, the filter effect of filter bag can be enhanced.
Preferably, fibrofelt, the fibrofelt are additionally provided in the outer filter cloth of the double-layer fabric and/or inner filter cloth
Select staple glass fibre, PPS staple fiber, short basalt fiber, polyester staple fiber, polyamide staple fibre, polytef flocks
One of or it is a variety of.It is furthermore preferred that the fibrofelt is in such a way that needle pierces and the outer filter cloth of double-layer fabric and/or interior
Side filter cloth is affixed.It is furthermore preferred that the outer surface of the fibrofelt is covered with polytetrafluoroethylmicroporous microporous membrane.
It is furthermore preferred that polytetrafluoroethylmicroporous microporous membrane is covered in the outer surface of the outer filter cloth, in the outer of inner filter cloth
Surface is not provided with polytetrafluoroethylmicroporous microporous membrane.In this way, inner filter cloth is enabled to first to filter the cigarette with greater particle size
Then flue dust compared with small particle is remained outer filter cloth filtering by dirt.Simultaneously as the outer surface of exterior measuring filter cloth is covered with polytetrafluoroethyl-ne
Alkene microporous membrane, this makes resistance of the flue gas when passing through outer filter cloth be greater than resistance when passing through inner filter cloth, so as to cause
Space between inner filter cloth and outer filter cloth still has biggish gas pressure, which is enough to keep connecting line exceptionally straight.If
It is covered in polytetrafluoroethylmicroporous microporous membrane or inner filter cloth that be covered with polytetrafluoroethylene (PTFE) micro- in inner filter cloth and outer filter cloth
It is not covered with polytetrafluoroethylmicroporous microporous membrane on hole film and outer filter cloth, then inner filter cloth is larger to the resistance of flue gas, can be led
Cause flue gas by the way that after inner filter cloth, pressure decline is excessive, it is possible to cause in the space between inner filter cloth and outer filter cloth
Gas pressure is insufficient to allow connecting line exceptionally straight, so that the filter efficiency of outer filter cloth is greatly reduced, and makes inner filter cloth
Excessive filtration duty is shared.This is unfavorable for the extension of life of bag filter.It is thus typically necessary to be arranged in inner filter cloth
The aperture of micropore is more than or equal to the aperture of the micropore in outer filter cloth, wherein when the aperture of the micropore in setting inner filter cloth is big
When the aperture of the micropore in outer filter cloth, the comprehensive benefits such as filter effect, use cost are optimal.
Preferably, the outer filter cloth of the double-layer fabric is all made of high temperature resistant chemical fibre with inner filter cloth and is made, including
But it is not limited to glass fibre, PPS fiber, aramid fibre, basalt fibre, polytetrafluoroethylene fibre.
A kind of preparation method of fume treatment double-layered filtering bag, includes the following steps:
(1) it the preparation of double-layer fabric: is weaved using exchange tissue double-deck in tied double weave or table, or uses three
Tie up knitting skill braiding；Obtained double-layer fabric includes outer filter cloth, inner filter cloth and connection inner filter cloth and outer filter cloth
Between connecting line；The thickness of the outer filter cloth: the thickness of inner filter cloth: the length of connecting line=(1~2): (1~2): (6
~30)；The distribution density of the connecting line is every square decimeter of 30-120 root；
(2) lapping: multilayer shape after shredding combs is laid in the outer filter cloth of double-layer fabric and inner filter cloth two sides
At web；
(3) needle thorn: carrying out two-side needled to the semi-finished product that lapping in step (2) obtains and controls depth of needling and needle thorn is close
Degree, so that being greater than the air penetrability of the web close to outer filter cloth side close to the air penetrability of the web of inner filter cloth side；
(4) it separates: will be pullled by the two sides of semi-finished product of step (3) needling treatment, guarantee inner filter cloth and outer
Side filter cloth is in separated position, and inner filter cloth caused by avoiding in acupuncture course is sticked together with outer filter cloth；
(5) overlay film: polytetrafluoroethylene (PTFE) micropore is covered on the surface of the web by needle thorn close to outer filter cloth side
Film；Polytetrafluoroethylmicroporous microporous membrane is not covered on the surface of the web by needle thorn close to inner filter cloth side；
(6) bag making: the product that step (5) obtains is cut, and is sewed to get double-layered filtering bag is arrived.
Preferably, it before the step (5) overlay film, can also be singed, calendering, the anti-oil processing of water repellent.
Being specifically chosen which kind of processing step can be selected according to actual needs.
When in use, can choose the thickness for making outer filter cloth and/or Gram Mass be less than inner filter cloth thickness and/
Or Gram Mass, so that flue gas pressures are enough to keep connecting line exceptionally straight.When flue gas pressures are insufficient to allow connecting line exceptionally straight,
Flue gas to be filtered can be pressurized to be enough to make connecting line exceptionally straight.
Beneficial effect
Compared with prior art, the invention has the following beneficial effects: of the invention to provide a kind of fume treatment use pair
Layer filter bag, which can adapt to the working environment of fume high-temperature, and active force is uniform between ectonexine, service life
It is long.In addition, the filter bag can also easily detect dedusting pressure, it can simply and easily judge filter bag with the presence or absence of loophole, nothing
Need manual inspection.
Using the double-layered filtering bag carry out filtrating smoke dust, without the filter bag cage of design complex configurations, meanwhile, the double-layer structure it
Between there are certain spaces not will cause excessive resistance while increasing filter efficiency.Meanwhile including the dust deposition of part
Between side filter cloth and outer filter cloth, facilitate collection.In addition, the connecting line between inner filter cloth and outer filter cloth belongs to flexible material
Matter, can it is instant rolled shipment it is defeated, will not be pressed down, occupied space is few；When filter bag is installed and used, in the effect of flue gas pressures
Under exceptionally straight connecting line, certain interlayer space is consequently formed.In other words, double-layered filtering bag of the invention, both takes full advantage of cigarette
The pressure of gas itself also increases filter efficiency, while not will cause excessive resistance, and eliminates the filter bag cage of labyrinth
Structure only uses the filter bag frame of ordinary construction.
Filter bag manufacture craft of the invention is simple, and high production efficiency facilitates large-scale industrial production.
Detailed description of the invention
Fig. 1 is the schematic cross-section of double-layered filtering bag of the invention in its natural state；
Fig. 2 is that flue gas makes the schematic cross-section of the exceptionally straight state of connecting line to double-layered filtering bag of the invention at work.
Appended drawing reference: 1, outer filter cloth；2, inner filter cloth；3, connecting line.
Specific embodiment
Below in conjunction with specific embodiments and drawings, the present invention is described in detail.
As shown in Figure 1, a kind of fume treatment double-layered filtering bag, it is characterised in that: the double-layered filtering bag uses double-layer fabric
Be made, the double-layer fabric include outer filter cloth 1, inner filter cloth 2 and connection inner filter cloth 2 and outer filter cloth 1 between company
Wiring 3.
In the double-layer fabric, the thickness of outer filter cloth 1: the thickness of inner filter cloth 2: the length of connecting line 3=(1~2):
(1~2): (6~30).It is furthermore preferred that the length of the connecting line 3 is 8-25mm, the outer filter cloth 1 and inner filter cloth 2
Thickness within the scope of 0.5~2mm.So set, connecting line 3 can stretch (such as Fig. 2 when filter bag is acted on by flue gas pressures
Shown state), using connecting line 3 longer compared with inner filter cloth 2 or outer filter cloth 1, relatively large airflow space can be formed.
In the double-layer fabric, the distribution density of connecting line 3 is every square decimeter of 30-120 root.So set, can make
Connecting line 3 is distributed evenly between inner filter cloth 2 and outer filter cloth 1, and distribution density is appropriate, be both able to maintain inner filter cloth 2 with
There is uniform coupling force between outer filter cloth 1, will not be distributed because of connecting line 3 excessive and smoke filtration is caused to hinder
Hinder.In the use process of filter bag, part dust deposition is had between inner filter cloth 2 and outer filter cloth 1.If connecting line 3
Distribution density is too low, then the point of the power acted on outer filter cloth 1 by connecting line 3 can be made very few, stress is be easy to cause to concentrate,
So that the two-end part of connecting line 3 is easily damaged and broken hole occur in outer filter cloth 1 and inner filter cloth 2, filter effect is caused
Decline；It if the distribution of connecting line 3 is overstocked, can make more dust deposition on connecting line 3, and influence flue gas and filtered in inside
The mobility in the space between cloth 2 and outer filter cloth 1 can also reduce filter efficiency.
The connecting line 3 chemical fibre rounded using the smooth section in surface, such as aramid fibre, polyphenylene sulfide
Ether fiber, polytetrafluoroethylene fibre, polyimide fiber etc..The adhesion amount of flue dust can be reduced in this way.Under normal circumstances, described
Connecting line 3 does not select the fragile fibres such as glass fibre.Company in filter bag preparation process, between inner filter cloth 2 and outer filter cloth 1
Wiring 3 can repeatedly be bent, and can also compress inner filter cloth 2 and outer filter cloth 1, therefore connecting line 3 when filter bag carries out package transport
Other than requiring the performances such as the higher, high temperature resistant of strength, it is also necessary to certain flexibility.Glass fibre is more crisp, easily broken in bending.
The connecting line 3 is using the thick denier chemical fiber monofilament that section is rounded and surface is smooth, fineness 9-25dtex.
Thick denier chemical fiber monofilament is selected, the surface that can avoid passing through the connecting line 3 that more chemical-fibres filaments of twisting are formed has groove, makes it
It is not easy to adhere to flue dust.Using the chemical fiber monofilament of thicker circular cross-section, it is possible to reduce the adhesion amount of flue dust.
Gas pressure sensor (not shown) is provided between the inner filter cloth 2 and outer filter cloth 1.It is furthermore preferred that
Gas pressure sensor (not shown) is respectively provided in the outside of inner filter cloth 2 and the outside of outer filter cloth 1.Filter bag is in normal work
When making, flue gas is entering between inner filter cloth 2 and outer filter cloth 1 after inner filter cloth 2, during this, gas pressure meeting
It reduces, flue gas passes through outer filter cloth 1 later.In other words, pass through the flue gas pressures P1 > inner filter cloth 2 before inner filter cloth 2
Flue gas pressures P2 > flue gas between outer filter cloth 1 passes through the pressure P3 after outer filter cloth 1.When normal work, inner filter cloth 2
Flue gas pressures P2 between outer filter cloth 1 can maintain certain section and remain unchanged and (section is denoted as X), when inside is filtered
When breakage occurs for cloth 2 and/or outer filter cloth 1, the flue gas pressures P2 between inner filter cloth 2 and outer filter cloth 1 can occur sharply to become
Thus it is damaged to can determine whether that filter bag occurs by change or substantial deviation X.If the flue gas pressures P2 between inner filter cloth 2 and outer filter cloth 1
It increased dramatically or the maximum value greater than X, then judgement is that breakage occurs for inner filter cloth 2；If inner filter cloth 2 and outer filter cloth 1
Between flue gas pressures P2 can strongly reduce or the minimum value less than X, then judgement is that breakage occurs for outer filter cloth 1.
The double-layer fabric is made into using exchange tissue double-deck in tied double weave, table, or uses 3 D weaving skill
Art weaves.
It is furthermore preferred that being covered with the film with micropore, shape on the outer filter cloth 1 and/or inner filter cloth 2 of the double-layer fabric
At the material selection polytetrafluoroethylene (PTFE) of the film.So set, the filter effect of filter bag can be enhanced.
Preferably, it is additionally provided with fibrofelt (not shown) in the outer filter cloth 1 of the double-layer fabric and/or inner filter cloth 2,
The fibrofelt selects staple glass fibre, PPS staple fiber, short basalt fiber, polyester staple fiber, polyamide staple fibre, polytetrafluoro
One of ethylene staple fiber is a variety of.It is furthermore preferred that the fibrofelt be needle pierce by way of and double-layer fabric outside
Filter cloth 1 and/or inner filter cloth 2 are affixed.It is furthermore preferred that the outer surface of the fibrofelt is covered with polytetrafluoroethylmicroporous microporous membrane.
It is furthermore preferred that polytetrafluoroethylmicroporous microporous membrane (not shown) is covered in the outer surface of the outer filter cloth 1, in inside
The outer surface of filter cloth 2 is not provided with polytetrafluoroethylmicroporous microporous membrane.In this way, enable to inner filter cloth 2 first filter have compared with
Then flue dust compared with small particle is remained outer filter cloth 1 and filtered by large-sized flue dust.Simultaneously as the outer surface of exterior measuring filter cloth
It is covered with polytetrafluoroethylmicroporous microporous membrane, when this is greater than resistance of flue gas when through outer filter cloth 1 by inner filter cloth 2
Resistance still has biggish gas pressure so as to cause the space between inner filter cloth 2 and outer filter cloth 1, which is enough
Keep connecting line 3 exceptionally straight.If being covered with polytetrafluoroethylmicroporous microporous membrane or inner filter cloth on inner filter cloth 2 and outer filter cloth 1
It is covered on 2 on polytetrafluoroethylmicroporous microporous membrane and outer filter cloth 1 and is not covered with polytetrafluoroethylmicroporous microporous membrane, then inner filter cloth 2
It is larger to the resistance of flue gas, will lead to flue gas by the way that after inner filter cloth 2, pressure decline is excessive, it is possible to cause inner filter cloth 2 with
The gas pressure in space between outer filter cloth 1 is insufficient to allow connecting line 3 exceptionally straight, so that the filtering of outer filter cloth 1 is imitated
Rate is greatly reduced, and inner filter cloth 2 is made to have shared excessive filtration duty.This is unfavorable for the extension of life of bag filter.Cause
This, it usually needs the aperture of the micropore in setting inner filter cloth 2 is more than or equal to the aperture of the micropore in outer filter cloth 1, wherein when
Be arranged the micropore in inner filter cloth 2 aperture be greater than outer filter cloth 1 in micropore aperture when, filter effect, use cost etc.
Comprehensive benefit is optimal.
The outer filter cloth 1 of the double-layer fabric is all made of high temperature resistant chemical fibre with inner filter cloth 2 and is made, including but unlimited
In glass fibre, PPS fiber, aramid fibre, basalt fibre, polytetrafluoroethylene fibre.
A kind of preparation method of fume treatment double-layered filtering bag, includes the following steps:
(1) it the preparation of double-layer fabric: is weaved using exchange tissue double-deck in tied double weave or table, or uses three
Tie up knitting skill braiding；Obtained double-layer fabric includes outer filter cloth 1, inner filter cloth 2 and connection inner filter cloth 2 and outside filter
Connecting line 3 between cloth 1；The thickness of the outer filter cloth 1: the thickness of inner filter cloth 2: the length of connecting line 3=(1~2): (1
~2): (6~30)；The distribution density of the connecting line 3 is every square decimeter of 30-120 root；
(2) lapping: multilayer is laid with after shredding combs in the outer filter cloth 1 of double-layer fabric and 2 two sides of inner filter cloth
The web of formation；
(3) needle thorn: carrying out two-side needled to the semi-finished product that lapping in step (2) obtains and controls depth of needling and needle thorn is close
Degree, so that the air penetrability close to the web of 2 side of inner filter cloth is greater than the ventilative of the web close to 1 side of outer filter cloth
Rate；
(4) it separates: will be pullled by the two sides of semi-finished product of step (3) needling treatment, guarantee inner filter cloth 2 and outer
Side filter cloth 11 is in separated position, and inner filter cloth 2 caused by avoiding in acupuncture course is sticked together with outer filter cloth 11；
(5) overlay film: it is micro- that polytetrafluoroethylene (PTFE) is covered on the surface of the web by needle thorn close to 11 side of outer filter cloth
Hole film；Polytetrafluoroethylmicroporous microporous membrane is not covered on the surface of the web by needle thorn close to 2 side of inner filter cloth；
(6) bag making: the product that step (5) obtains is cut, and is sewed to get double-layered filtering bag is arrived.
Preferably, it before the step (5) overlay film, can also be singed, calendering, the anti-oil processing of water repellent.
Being specifically chosen which kind of processing step can be selected according to actual needs.
When in use, can choose the thickness for making outer filter cloth and/or Gram Mass be less than inner filter cloth thickness and/
Or Gram Mass, so that flue gas pressures are enough to keep connecting line exceptionally straight.When flue gas pressures are insufficient to allow connecting line exceptionally straight,
Flue gas to be filtered can be pressurized to be enough to make connecting line exceptionally straight.
When carrying out fume treatment using the double-layered filtering bag, the flue dust in flue gas contacts inner filter cloth side at first and carried out
Filter, the biggish flue dust of part partial size are filtered；Flue gas continues through inner filter cloth at this time, makes between inner filter cloth and outer filter cloth
There are certain flue gas pressures, which makes connecting line be in exceptionally straight state, and interlayer space is consequently formed；Flue gas continues to wear
Outer filter cloth is crossed, is further filtered, the lesser flue dust of particle is filtered, and the flue gas for meeting environmental requirement is discharged.
Finally it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than the present invention is protected
The limitation of range is protected, although explaining in detail referring to preferred embodiment to the present invention, those skilled in the art are answered
Work as understanding, it can be with modification or equivalent replacement of the technical solution of the present invention are made, without departing from the reality of technical solution of the present invention
Matter and range.
Claims (6)
1. a kind of preparation method of fume treatment double-layered filtering bag, includes the following steps:
(1) it the preparation of double-layer fabric: is weaved using exchange tissue double-deck in tied double weave or table, or is compiled using three-dimensional
Knit technology braiding；Obtained double-layer fabric includes outer filter cloth, inner filter cloth and connects between inner filter cloth and outer filter cloth
Connecting line；The thickness of the outer filter cloth: the thickness of inner filter cloth: the length of connecting line=(1~2): (1~2): (6~
30)；The distribution density of the connecting line is every square decimeter of 30-120 root；
(2) lapping: it is laid with what multilayer was formed after shredding combs in the outer filter cloth of double-layer fabric and inner filter cloth two sides
Web；
(3) needle pierces: two-side needled is carried out to the semi-finished product that lapping in step (2) obtains and controls depth of needling and needling density,
So that being greater than the air penetrability of the web close to outer filter cloth side close to the air penetrability of the web of inner filter cloth side；
(4) it separates: the two sides of the semi-finished product by step (3) needling treatment is pullled, guarantee that inner filter cloth and outside are filtered
Cloth is in separated position, and inner filter cloth caused by avoiding in acupuncture course is sticked together with outer filter cloth；
(5) overlay film: polytetrafluoroethylmicroporous microporous membrane is covered on the surface of the web by needle thorn close to outer filter cloth side；
Polytetrafluoroethylmicroporous microporous membrane is not covered on the surface of the web by needle thorn close to inner filter cloth side；
(6) bag making: the product that step (5) obtains is cut, and is sewed to get double-layered filtering bag is arrived.
2. the preparation method of fume treatment double-layered filtering bag as described in claim 1, it is characterised in that: in the step (5)
It before overlay film, is also singed, at least one of calendering and the anti-oil processing of water repellent processing step.
3. the preparation method of fume treatment double-layered filtering bag as described in claim 1, it is characterised in that: the length of the connecting line
Spending is 8-25mm, and the thickness of the outer filter cloth and inner filter cloth is within the scope of 0.5~2mm.
4. the preparation method of fume treatment double-layered filtering bag as described in claim 1, it is characterised in that: the connecting line uses
The thick denier chemical fiber monofilament that section is rounded and surface is smooth, fineness 9-25dtex.
5. the fume treatment prepared using the preparation method of fume treatment double-layered filtering bag according to any one of claims 1-4
Use double-layered filtering bag.
6. fume treatment double-layered filtering bag as claimed in claim 5, it is characterised in that: in the inner filter cloth and outer filter cloth
Between be provided with gas pressure sensor, be respectively provided on the outside of the outside of inner filter cloth and outer filter cloth gas pressure sensing
Device.
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| CN201811284460.6A CN109289323B (en) | 2018-10-30 | 2018-10-30 | A kind of fume treatment double-layered filtering bag |
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| CN201811284460.6A CN109289323B (en) | 2018-10-30 | 2018-10-30 | A kind of fume treatment double-layered filtering bag |
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| CN109289323A CN109289323A (en) | 2019-02-01 |
| CN109289323B true CN109289323B (en) | 2019-09-24 |
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| CN114602265B (en) * | 2020-11-23 | 2023-08-15 | 湖南华中天地环保科技有限公司 | Dust removal cloth bag surface damage detection device based on dust removal equipment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS634821A (en) * | 1986-06-23 | 1988-01-09 | Ashimori Ind Co Ltd | Filter and its manufacture |
| CN2145062Y (en) * | 1992-09-02 | 1993-11-03 | 鞍山市通风除尘设备总厂 | Double-layer round-bag dust remover with machinery rotary jetting |
| CN108355388A (en) * | 2018-02-01 | 2018-08-03 | 江苏华源医疗科技股份有限公司 | PVC slurries filtration bags |
-
2018
- 2018-10-30 CN CN201811284460.6A patent/CN109289323B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS634821A (en) * | 1986-06-23 | 1988-01-09 | Ashimori Ind Co Ltd | Filter and its manufacture |
| CN2145062Y (en) * | 1992-09-02 | 1993-11-03 | 鞍山市通风除尘设备总厂 | Double-layer round-bag dust remover with machinery rotary jetting |
| CN108355388A (en) * | 2018-02-01 | 2018-08-03 | 江苏华源医疗科技股份有限公司 | PVC slurries filtration bags |
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| CN109289323A (en) | 2019-02-01 |
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Address after: 224434 No. 6, Fuyuan Road, Fucheng Industrial Park, Funing County, Yancheng City, Jiangsu Province Patentee after: Jiangsu Zhizhen Environmental Protection Technology Group Co.,Ltd. Address before: 224400 No.6 Fuyuan Road, Fucheng Industrial Park, Funing County, Yancheng City, Jiangsu Province Patentee before: JIANGSU ZHIZHEN ENVIRONMENTAL PROTECTION TECHNOLOGY CO.,LTD. |
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Denomination of invention: A double-layer filter bag for flue gas treatment Effective date of registration: 20220330 Granted publication date: 20190924 Pledgee: Bank of Nanjing Co.,Ltd. Yancheng branch Pledgor: Jiangsu Zhizhen Environmental Protection Technology Group Co.,Ltd. Registration number: Y2022980003617 |
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