CN107469465A - A kind of pre-oxidized polyacrylonitrile fiber high temperature resistant bag-type dusting filtrate and preparation method thereof - Google Patents
A kind of pre-oxidized polyacrylonitrile fiber high temperature resistant bag-type dusting filtrate and preparation method thereof Download PDFInfo
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- CN107469465A CN107469465A CN201710883739.5A CN201710883739A CN107469465A CN 107469465 A CN107469465 A CN 107469465A CN 201710883739 A CN201710883739 A CN 201710883739A CN 107469465 A CN107469465 A CN 107469465A
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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
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
- B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
- B01D2239/0604—Arrangement of the fibres in the filtering material
- B01D2239/0613—Woven
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/10—Filtering material manufacturing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/02—Synthetic macromolecular fibres
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/02—Synthetic macromolecular fibres
- B32B2262/0223—Vinyl resin fibres
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
- Y02A50/2351—Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust
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- Chemical Kinetics & Catalysis (AREA)
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Abstract
The present invention discloses a kind of pre-oxidized polyacrylonitrile fiber high temperature resistant bag-type dusting filtrate, including basic unit and the composite fibre that pre-oxidized polyacrylonitrile fiber and polyphenylene sulfide fibre form is become entangled in into the dust-collecting face fibrous face layer of basic unit's upper and lower surface composition and non-dust-collecting face fibrous face layer, the basic unit by needling process includes at least one layer of base fabric；The thickness of described dust-collecting face fibrous face layer is more than the thickness of non-dust-collecting face fibrous face layer, and the length of described dust-collecting face fibrous face layer or the polyphenylene sulfide fibre in non-dust-collecting face fibrous face layer is longer than the length of pre-oxidized polyacrylonitrile fiber.The invention also discloses the preparation method method of the dedusting filtrate.High temperature resistant bag-type dusting filtrate produced by the invention have that intensity is high, resistance to elevated temperatures is excellent, fire-retardant, corrosion-resistant, porosity is high, filtration efficiency, Resistance Value are low and stably, the premium properties such as easy-to-clean ash, suitable for the high temperature fume emission environment such as smelting iron and steel, waste incineration, thermal power generation and Industrial Stoves.
Description
Technical field
The present invention relates to a kind of bag-type dusting filtrate, more particularly to a kind of pre-oxidized polyacrylonitrile fiber high temperature resistant pocket type to remove
Dirt filtrate.Meanwhile the invention further relates to the preparation method of above-mentioned bag-type dusting filtrate.
Background technology
The source of air pollution is concentrated mainly on the discharge of the industrial circles such as steel, metallurgy, thermoelectricity, cement and waste incineration
Waste gas, these EGTs may be up to more than 300 DEG C, even aramid fiber, polyphenylene sulfide (PPS), polyimides, polytetrafluoroethylene (PTFE)
(PTFE) filtering material prepared by contour performance fibers, is also only capable of the long-term work under conditions of 200 DEG C or so, high-temperature flue gas is past
It could be filtered after the cooling of increase long pipe road toward needs.It is generally used for aramid fiber, the polyphenylene sulfide of high temperature filtration
(PPS), polyimides, the contour performance fibers price of polytetrafluoroethylene (PTFE) (PTFE) are universal higher, and most of iron and steel enterprise at present
In to maintain yield to lose the state of operation, lack of capital, it is difficult to substantial contribution is put into environmental protection, be faced with interests with
Difficult selection between environment.
Polyacrylonitrile fibre does not originally possess resistant to elevated temperatures characteristic, but excellent polyacrylonitrile fibre is by pre-oxidation, carbon
Change, carbon fiber can be made after graphitization, each step can all produce intermediate product in this process, and preoxidized polyacrylonitrile is fine
Dimension is exactly one of them, and in actual production, a part of pre-oxidized fibers are used to continue deep processing, and other are then only used for making
Make some cheap products, such as Sound-proof material, heat-barrier material, fire proofing, form not little waste.The pre- oxygen of polyacrylonitrile
Chemical fibre dimension limited oxygen index be up to more than 45%, have do not melt, do not soften, do not shrink, performance is steady in 400 DEG C of atmospheric environment
The features such as determining, cost is relatively low, and pre-oxidized polyacrylonitrile fiber is about 30 yuan/kilogram, and the price of other high-performance fibers is equal
At 120 yuan or so, directly high-temperature flue gas can be filtered, be the ideal chose of high temperature resistant bag-type dusting filtrate.
China's filtering is started late with industrial textile, larger gap compared with developed countries be present, especially in high temperature resistant
In terms of bag-type dusting filtrate, the performance and price of domestic filtering material product are all difficult to be formed to compete with external product.Polypropylene
Although nitrile pre-oxidized fibers resistance to elevated temperatures is excellent, shear strength is poor, and difficulty of processing is larger, in high-temperature bag dust removal filtrate
The application in field still slower development, not yet forms industrialized production.
Japan is constantly in leading position in terms of carbon fiber research, and its pre-oxidized polyacrylonitrile fiber is still mainly used in
Refractory material, heat-barrier material, Fireproof carpet etc., and fire-entry suit of procedure complexity etc., but in processing cost phase
It is rarely reported in terms of to relatively low but high added value high temperature resistant bag-type dusting filtrate；Domestic carbon fiber research is started late,
Pre-oxidized fibers should aspect it is even more so, 1999, Zhang Haosheng of textile scientific research institute of Jiangsu Province et al. was once used
Pre-oxidized polyacrylonitrile fiber prepares high-temperature bag dust removal filtrate, using needling process by pre-oxidized polyacrylonitrile fiber with it is high-strength
Alkali-free glass fibre enhancing base fabric is compound so that the intensity of Compound filtering material has brought up to more than 1000N/5cm, yet with pre- oxygen
Chemical fibre is tieed up belongs to fragile fibre material with glass fibre, is unfavorable for deashing and long-term use, is not widely used.Except this it
Outside, rarely have and see on making high temperature resistant bag-type dusting filtrate and the report applied with pre-oxidized fibers.
Relate to use pre-oxidized polyacrylonitrile fiber chopped fiber and long filament in the A of application for a patent for invention CN 104711775
A kind of preparation method of continuous decentralized filament fiber Nomex is prepared, but its purpose is not intended to high-temperature bag dust removal field,
And and unresolved pre-oxidized polyacrylonitrile fiber be used for the strength problem and deashing property problem present in filtrate, what it was prepared
Be present the defects of low intensity, rough surface, filter efficiency is low, and deashing property is poor, and service life is short in Nomex, can be applied to thick
Effect filtering, but it is difficult to the Essential Performance Requirements for reaching conventional bag-type dusting filtrate, it is not suitable for high temperature resistant bag-type dusting filtrate neck
Domain.
In summary, high temperature resistant bag-type dusting filtrate is prepared using pre-oxidized polyacrylonitrile fiber at present and following ask is present
Topic：
1. pre-oxidized polyacrylonitrile fiber self-strength is relatively low, and shear strength is poor, and difficulty of processing is larger, general acupuncture work
Skill is damaged excessive to it, and product strength is extremely low, is simply possible to use in acoustical cotton, heat insulation foam etc., is not suitable for high-temperature bag dust removal filtrate
Field；
2. the Nomex that pre-oxidized polyacrylonitrile fiber is process, surface are slightly made, but internal fiber surface is very
Smooth, there is the defects of filter efficiency is low, and deashing property is poor, and service life is short in this structure in bag dust abatement field, need
Frequently change, cost goes up not down.
The content of the invention
High-temperature bag dust removal filtrate is dfficult to apply to for current pre-oxidized polyacrylonitrile fiber, but great potential quality again simultaneously
One of present situation, the object of the invention be to provide a kind of excellent performance and cheap pre-oxidized polyacrylonitrile fiber high temperature resistant bag
Formula dedusting filtrate, it is mainly woven in base fabric by pre-oxidized polyacrylonitrile fiber and polyphenylene sulfide fibre blending, effectively evaded
Pre-oxidized polyacrylonitrile fiber self-strength is relatively low and the shortcomings that shear strength is poor, and improve the filter efficiency of its product with it is clear
Grey performance, and gas pollution control material cost is greatly reduced, help to promote Environmental Protection in China cause process.
The second object of the present invention is to provide the preparation side of pre-oxidized polyacrylonitrile fiber high temperature resistant bag-type dusting filtrate
Method.
An object of the present invention is achieved through the following technical solutions：A kind of pre-oxidized polyacrylonitrile fiber high temperature resistant bag
Formula dedusting filtrate, including basic unit and be made up of pre-oxidized polyacrylonitrile fiber and polyphenylene sulfide fibre needling process mixed
Condensating fiber becomes entangled in the dust-collecting face fibrous face layer of basic unit's upper and lower surface and non-dust-collecting face fibrous face layer, and the basic unit is included at least
One layer of base fabric；The thickness of described dust-collecting face fibrous face layer is slightly larger than the thickness of non-dust-collecting face fibrous face layer, described dust-collecting face
Fibrous face layer or the length of the polyphenylene sulfide fibre in non-dust-collecting face fibrous face layer are slightly longer than the length of pre-oxidized polyacrylonitrile fiber
Degree.
As a preferred embodiment of the present invention, the base fabric uses low close aramid fiber woven fabric.Low close aramid fiber woven fabric
Aramid fiber used is aramid fiber 1313, and warp thread is identical with weft yarn line density, and its line density is between 30tex to 45tex, through close and filling density
Identical, its weft density is between 55/10cm to 75/10cm.Because pre-oxidized polyacrylonitrile fiber shear strength is relatively low, base
Cloth need to select high-strength flatness but have the high-temperature fibre product of certain flexibility simultaneously, and aramid fiber has been provided simultaneously with above advantage, because
This uses kevlar fabric.Using the relatively low low close aramid fiber woven fabric of weft density as base fabric, base fabric can be reduced to media filtration
The influence of energy while proof strength, and through the close isotropism that can ensure high-temperature bag dust removal filtrate identical with filling density again.
Described pre-oxidized polyacrylonitrile fiber length is 50-65mm, and described polyphenylene sulfide fibre length is 75-
The ratio 65 of 90mm, described pre-oxidized polyacrylonitrile fiber and polyphenylene sulfide fibre mixing:35 to 55:Between 45.Adopt merely
When preparing filtrate with pre-oxidized polyacrylonitrile fiber, the strength of filtrate is relatively low, and filter efficiency is poor with deashing property, only possesses
Resistance to elevated temperatures, to improve its mechanical property, while the fiber inside filtrate is submitted to tangle degree and hole tortuous, selection is resistance to
High temperature, it is provided simultaneously with the heat treatable polyphenylene sulfide fibre of fusing point and is mixed with, experiment results proved is when polyphenylene sulfide fibre
Content is pre- to polyacrylonitrile most beneficial for reducing before 35%-45%, and when length is slightly longer than pre-oxidized polyacrylonitrile fiber
The damage of oxidized fibre, while improve its filter efficiency and deashing property.
The ratio of the grammes per square metre of described dust-collecting face fibrous face layer and the grammes per square metre of non-dust-collecting face fibrous face layer is 6:4, two fibres
It is 500-650g/m to tie up the total grammes per square metre of surface layer2。
Further, it is stained with polytetrafluoro on the fiber of the dust-collecting face fibrous face layer and non-dust-collecting face fibrous face layer
Ethene particle.
Further, the dust-collecting face fibrous face layer is provided with least one layer of poly tetrafluoroethylene.
The second object of the present invention is achieved through the following technical solutions：A kind of pre-oxidized polyacrylonitrile fiber high temperature resistant bag
Formula dedusting filtrate, composite fibre is formed with polyphenylene sulfide fibre by major ingredient of pre-oxidized polyacrylonitrile fiber, it is quiet by disappearing successively
After electric treatment, shredding, combing, lapping formation dust-collecting face fibrous face layer/base fabric/non-dust-collecting face fibrous face layer is carried out in base fabric
Lapping structure, wherein the thickness of the dust-collecting face fibrous face layer is slightly larger than non-dust-collecting face fibrous face layer, carry out successively afterwards acupuncture,
Oil processing, drying, high-temperature heat treatment, dipping and baking are gone in spun lacing, washing, finally obtain bag-type dusting filtrate.
Described pre-oxidized polyacrylonitrile fiber length is 50-65mm, and described polyphenylene sulfide fibre length is 75-
The ratio 65 of 90mm, described pre-oxidized polyacrylonitrile fiber and polyphenylene sulfide fibre mixing:35 to 55:Between 45.
The base fabric includes but is not limited to low close aramid fiber woven fabric.
The Electrostatic Treatment process that disappears is：The cationic antistatic agent that mass fraction is 2-5% is sprayed on all fibres,
Then sealing and standing 24 hours at room temperature.Pre-oxidized polyacrylonitrile fiber shear strength is low, in process, easily by
External force influences and is broken, while mixed polyphenylene sulfide fibre easily static electrification, therefore the Electrostatic Treatment that disappeared accordingly to it, disappears
Destatic while improve its degree of wetting, improve processing characteristics.
The spacing of cylinder and doffer are 0.10-0.25mm in described carding process, and fast ratio is 1.4-1.65.It is although right
Composite fibre has carried out the Electrostatic Treatment that disappears accordingly, but because fibre density is relatively low, still exists in carding process and be difficult to by tin
Woods is transferred to doffer, therefore uses less spacing, large speed ratio, to improve the rate of transform of fiber, while reduces fiber loss.
The process of described lapping is：Establish the lapping knot of dust-collecting face fibrous face layer/base fabric/non-dust-collecting face fibrous face layer
Structure, the wherein grammes per square metre of dust-collecting face fibrous face layer and the ratio of the grammes per square metre of non-dust-collecting face fibrous face layer are 6:4, the total grammes per square metre of fibrous face layer
For 500-650g/m2.Using the design different from non-dust-collecting face fibrous facing layer thickness of dust-collecting face fibrous face layer, it is intended to improve non-meet
Dirt face fibrous facing layer thickness can be effectively improved it to be advantageous to further post-process non-dust-collecting face fibrous face layer
Strainability, especially its deashing property.
Described acupuncture course is divided into pre-needling and main two processes of acupuncture, wherein pre-needling pricker density be 15-25 thorns/
cm2, depth 4-6mm, frequency is 80-130 thorns/min, output speed 1.5-2.0m/min.Main acupuncture pricker density is 40-
60 thorns/cm2, depth 5-8mm, frequency is 200-280 thorns/min, output speed 1.5-2.0m/min.The pre- oxygen of polyacrylonitrile
Chemical fibre dimension shear strength is low, is processed using general acupuncture technique, easily causes pre-oxidized polyacrylonitrile fiber fracture, is formed
Chopped fiber, be easily blown during smoke filtration, be emitted into air formed pollution, while filter efficiency with filter course not
It is disconnected to decline, therefore relatively low close, the shallower depth of needling of pin need to be used, relatively low punch frequency, but need to ensure fiber again simultaneously
Between tangle degree and tortuous, relatively low output speed need to be used, the results showed, foregoing pre-needling and main acupuncture work
Skill protects pre-oxidized polyacrylonitrile fiber not cut off by external force to greatest extent while being tangled between fiber is ensured, protects
Hinder its performance is not influenceed by fracture fiber.
The spray nozzle density that described spun lacing process uses is 30-50/cm2, pressure 3-8MPa, output speed 1.5-
2.0m/min.Because the needling process of use is more gentle, the dust-collecting face fibrous face layer of filtrate is more coarse after acupuncture, and cavity
It is more, it is unfavorable for improving its filter efficiency and deashing property, therefore its surface is further processed using water jet process, try
Test and show, arrangement is further processed to the filtrate after acupuncture using process above parameter, its surface can be effectively improved
Flatness, pin hole is eliminated, improves its filter efficiency and deashing property, while do not damage pre-oxidized polyacrylonitrile fiber.
Described high-temperature heat treatment is carried out by the way of multiple two Roller hot rollings, specifically, using the Roller hot rollings of 4-6 groups two,
Hot rolling Roller temperature zonal controls, upper hot rolling Roller temperature are 280 DEG C, and lower hot rolling Roller temperature is 290 DEG C, wherein dust-collecting face fibrous face layer
Press close to lower hot rolling Roller, speed 1-1.5m/min, hot rolling Roller pressure is stepped up from front to back, and first group of hot rolling Roller pressure is
0.1-0.3MPa, last group of hot rolling Roller pressure are 0.6-0.8MPa.After oil processing is gone in washing and is dried, in polyphenylene sulfide
The temperature of fiber melt is heat-treated to filtrate, makes polyphenylene sulfide fibre partial melting, with pre-oxidized polyacrylonitrile fiber shape
Into bonding point, while the excessive hole in part is filled up, filter structure can be made more stable, the intensity of filtrate is effectively improved, subtract
Small interfibrous space, and make dust-collecting face more smooth, while the intensity, filter efficiency and deashing property of filtrate are improved, but mistake
More heat treatment can cause a large amount of polyphenylene sulfide fibres to melt, and cause space to block, and resistance drastically raises, and the present invention uses more
The degree of heat treatment can effectively be controlled by weighing the mode of two Roller hot rollings, on the premise of not causing resistance to be substantially increased, be improved poly-
Intensity, filter efficiency and the deashing property of acrylonitrile pre-oxidized fibers high temperature resistant bag-type dusting filtrate.
Described impregnation technology is：Dipping formula of liquid is mass fraction：Ptfe emulsion：5%-10%, melamine
Amine-formaldehyde resins emulsion：6%-9%, surplus are water；Filtrate is put into the maceration extract for the state of being stirred until homogeneous, ultrasonic 1-2
Hour, supersonic frequency 2530kHz, temperature is 60 DEG C.Described dipping and baking specifically, mangle pick-up is 60-80%,
The preliminary drying 30min under the conditions of 90 DEG C, then bakees 3min under the conditions of 160 DEG C.Ptfe emulsion dipping is carried out to filtrate
The tortuous of filtrate internal void can be effectively improved, so as to improve filter efficiency, but when filtering media application is in high temperature filtration,
Common dipping means are difficult to make polytetrafluoroethylgranule granule thing be fixed on fiber surface, the flue gas mistake that particulate matter can be passed through at a high speed
Air filtration stream is taken out of, forms pollution.Melamine resin emulsion curing agent the most is used in the present invention, at 160 DEG C to trimerization
Cyanamide formaldehyde resin is solidified, and can effectively improve polytetrafluoroethylgranule granule thing and interfibrous adhesion, and can bear nearly 200
DEG C high temperature, while ensureing that polytetrafluoroethylgranule granule thing is firm, improve fiber surface degree of roughness and hole tortuous,
It can effectively improve pre-oxidized polyacrylonitrile fiber high temperature resistant bag-type dusting media filtration efficiency, and ensure it under the high temperature conditions
Performance.Preliminary drying serves pre-shrunk effect with bakeing to pre-oxidized polyacrylonitrile fiber high temperature resistant bag-type dusting filtrate simultaneously
Fruit, it is allowed to will not occur shrinkage stress again when entering worst hot case, has ensured its steady operation shape under worst hot case
State.
Further, when of the invention when also including poly tetrafluoroethylene, after terminating to bakee process, in dust-collecting face fiber
Poly tetrafluoroethylene is pasted on surface layer.
The invention has the advantages that：
The present invention is mixed by using pre-oxidized polyacrylonitrile fiber with polyphenylene sulfide fibre with certain proportion, preferably with low
Close aramid fiber woven fabric is base fabric, and pre-oxidized polyacrylonitrile fiber high temperature resistant bag-type dusting filtrate is prepared by needle point method.Can be effective
Solves pre-oxidized polyacrylonitrile fiber low intensity, shear strength is poor, it is difficult to process, product strength is low, and filter efficiency is low and deashing
The problem of poor performance, prepared pre-oxidized polyacrylonitrile fiber high temperature resistant bag-type dusting filtrate is compared with grammes per square metre identical common poly- third
Alkene nitrile pre-oxidized fibers Nomex, intensity can be improved to more than 1000N/5cm by 100-200N/5cm, while can be in 200 DEG C of height
Possess 90% intensity under the conditions of temperature (referring to Fig. 2)；PM1.0 filter efficiency can be improved to more than 95% by 80% or so；
And filter efficiency is basically unchanged under the high temperature conditions, dust filtration efficiency can be improved to more than 99.9% by 99.1% or so, together
When residual resistive it is slower (referring to Fig. 3) compared with the grammes per square metre identical plain polypropylene nitrile pre-oxidized fibers Nomex rate of climb, 30 times
1000Pa cleaning cycles dust-cleaning efficiency can be improved to more than 99% by 85% or so.
The present invention effectively improves cohesive force between pre-oxidized polyacrylonitrile fiber, solves its low intensity, and poor processability lacks
Point, while increased fiber surface roughness, the high temperature resistant bag-type dusting filtrate of production have intensity height, resistance to elevated temperatures excellent
It is good, fire-retardant, corrosion-resistant, porosity is high, filtration efficiency, Resistance Value are low and stably, the premium properties such as easy-to-clean ash, service life length
And it is cheap, suitable for the high temperature fume emission environment such as smelting iron and steel, waste incineration, thermal power generation and Industrial Stoves, can be
Pollution control enterprise saves a large amount for the treatment of costs.
Brief description of the drawings
Fig. 1 is the structural representation of the pre-oxidized polyacrylonitrile fiber high temperature resistant bag-type dusting filtrate of the embodiment of the present invention one
Figure.
Fig. 2 is pre-oxidized polyacrylonitrile fiber high temperature resistant bag-type dusting filtrate and plain polypropylene nitrile pre-oxidized fibers acupuncture
The extension at break curve of felt.
Fig. 3 is pre-oxidized polyacrylonitrile fiber high temperature resistant bag-type dusting filtrate and plain polypropylene nitrile pre-oxidized fibers acupuncture
Filter efficiency of the felt to different diameter airborne particle.
Fig. 4 is the remaining resistance of pre-oxidized polyacrylonitrile fiber high temperature resistant bag-type dusting 30 1000Pa cleaning cycles of filtrate
Force-time curve.
Fig. 5 is pre-oxidized polyacrylonitrile fiber high temperature resistant bag-type dusting filter material surface pattern prepared by the present invention.
Fig. 6 is the structural representation of the pre-oxidized polyacrylonitrile fiber high temperature resistant bag-type dusting filtrate of the embodiment of the present invention two
Figure.
Embodiment
Embodiment one
As shown in figure 1, the pre-oxidized polyacrylonitrile fiber high temperature resistant bag-type dusting filtrate of the present embodiment, including basic unit 1 with
And the composite fibre that pre-oxidized polyacrylonitrile fiber and polyphenylene sulfide fibre form is become entangled in above and below basic unit by needling process
The dust-collecting face fibrous face layer 2 on surface and non-dust-collecting face fibrous face layer 3.Pre-oxidized polyacrylonitrile fiber length is 60mm, polyphenyl
Sulfide fibers length is 80mm, pre-oxidized polyacrylonitrile fiber and polyphenylene sulfide fibre mixing ratio 60:Between 40.Dust-collecting face
The ratio of the grammes per square metre of fibrous face layer and the grammes per square metre of non-dust-collecting face fibrous face layer is 6:4, described two total grammes per square metres of fibrous face layer are
500g/m2, the thickness D1 of dust-collecting face fibrous face layer 2 is slightly larger than the thickness D2 of non-dust-collecting face fibrous face layer 3.Basic unit 1 is one layer
The low close aramid fiber woven fabric of base fabric, aramid fiber used in the low close aramid fiber woven fabric is aramid fiber 1313, and warp thread is with weft yarn line density
40tex, it is 65/10cm through close and filling density.Dedusting filtrate is by infusion process in dust-collecting face fibrous face layer 2 and non-dust-collecting face
Polytetrafluoroethylgranule granule is adhered on the fiber of fibrous face layer 3.
Preparation method is as follows：
Disappear Electrostatic Treatment：The pre-oxidized polyacrylonitrile fiber that length is 60mm is chosen, and the polyphenylene sulfide that length is 80mm
Ether fiber, with 60:40 mass ratio is mixed, and the cationic antistatic agent that mass fraction is 3% is sprayed on fiber, then
Sealing and standing 24 hours at room temperature.
Shredding, combing：Fiber by the Electrostatic Treatment that disappears is subjected to shredding mixed cotton, is sent into carding machine, carding machine tin is set
Woods and doffer's spacing are 0.15mm, and speed is than being 1.5.
Lapping：Fiber presses the lapping of dust-collecting face fibrous face layer/woven aramid fiber base fabric/non-dust-collecting face fibrous face layer after combing
Structure carries out alternately lapping, wherein aramid fiber used in low close aramid fiber woven fabric is aramid fiber 1313, warp thread is with weft yarn line density
40tex, it is 65/10cm through close and filling density, dust-collecting face web grammes per square metre is 300g/m2, non-dust-collecting face web grammes per square metre is
200g/m2。
Acupuncture：Using grammes per square metre as 300g/m2Dust-collecting face towards pricker carry out acupuncture, wherein pre-needling pricker density be 20
Thorn/cm2, depth 5mm, frequency is 100 thorns/min, and output speed 2.0m/min, main acupuncture pricker density is 50 thorns/cm2,
Depth is 7mm, and frequency is 250 thorns/min, and output speed 2.0m/min, pre-oxidized polyacrylonitrile fiber is resistance to after needling process
High-temperature bag dust removal filtrate matrix basic forming.
Spun lacing：Web is directly entered spun-laced machine after acupuncture, and water jet process is：40/cm of spray nozzle density2, pressure is
5MPa, output speed 2.0m/min, grammes per square metre 300g/m2Dust-collecting face towards nozzle.After water jet process is handled, polypropylene
The distribution of nitrile pre-oxidized fibers high temperature resistant bag-type dusting filter media fibre is more uniform, further reduces fiber gap, improves fiber
Part tangles degree, and improves the surface state of filtrate, especially dust-collecting face surface state, can further improve its filter efficiency
With deashing property.
Washing is deoiled and dried：After water jet process, pre-oxidized polyacrylonitrile fiber high temperature resistant bag-type dusting filtrate is carried out
Washing is gone oil processing and dried.
High-temperature heat treatment：Further heat is carried out to the pre-oxidized polyacrylonitrile fiber high temperature resistant bag-type dusting filtrate of drying
Processing, specific to use 5 group of two Roller hot rolling, upper hot rolling Roller temperature is 280 DEG C, and lower hot rolling Roller temperature is 290 DEG C, and wherein dust-collecting face is fine
Dimension surface layer presses close to lower hot rolling Roller, speed 1.5m/min, and hot rolling Roller pressure is stepped up from front to back, the 1st group of hot rolling Roller pressure
Strong is 0.2MPa, and the 2nd group of hot rolling Roller pressure is 0.2MPa, and the 3rd group of hot rolling Roller pressure is 0.4MPa, the 4th group of hot rolling Roller's
Pressure is 0.6MPa, and last group of hot rolling Roller pressure is 0.8MPa.Heat treatment makes polyphenylene sulfide fibre partial melting, with poly- third
Alkene nitrile pre-oxidized fibers form bonding point, while fill up the excessive hole in part, and filter structure can be made more stable, effectively carried
The intensity of high filtrate, reduce interfibrous space, and make dust-collecting face more smooth.
Dipping：The basic forming of pre-oxidized polyacrylonitrile fiber high temperature resistant bag-type dusting filtrate after heat treatment, to enter
One step improves its filter efficiency, and impregnation technology is carried out to it and is arranged and high temperature baking processing.It is quality specially to impregnate formula of liquid
Fraction：Ptfe emulsion：8%, melamine resin emulsion：6%, water：86%；Foregoing filtrate is put into and stirred
Into the maceration extract of uniform state, ultrasound 1 hour, supersonic frequency 25kHz, temperature is 60 DEG C.
Bakee：Filtrate is sent into ironer after dipping, mangle pick-up is 60%, the preliminary drying 30min under the conditions of 90 DEG C, so
Afterwards 3min is bakeed under the conditions of 160 DEG C.Polytetrafluoroethylene (PTFE) is solidificated in fiber surface by melamine resin, improves fiber
The crude extent on surface, while the tortuous in space is improved, further improve the filter efficiency of filtrate.So far, polyacrylonitrile
Prepared by pre-oxidized fibers high temperature resistant bag-type dusting filtrate completes.
Correlated performance test is carried out to filtrate made above, ultimate strength and the extension at break of filtrate use GB/
T3923.1-2013《Textile fabric tensile property part 1：The measure of ultimate strength and elongation at break (galley proof method)》Enter
After row test, wherein high temperature test is carried out in high-temperature cabinet, and sample first is put into high-temperature cabinet, and clamping is good, treat that temperature rises to
200 DEG C, then tested by GB/T 3923.1-2013；Filtrate is to dividing PM0.3, PM0.5, PM1.0, PM3.0 and PM5.0
Level filter efficiency uses GTT TM 047-2017《Fiber filtering classified filtering Efficiency test method》Tested；The powder of filtrate
Dirt dynamic filtration efficiency uses GB/T 6719-2009 Appendix B《Sack cleaner technical requirements》Tested.
After tested, vertically and horizontally it is broken through pre-oxidized polyacrylonitrile fiber high temperature resistant bag-type dusting filtrate manufactured in the present embodiment
Strongly essentially identical, its normal temperature longitudinal fracture intensity reaches 1148N/5cm, and cross-breaking strength reaches 1132N/5cm, in 200 DEG C of height
Its fracture strength can retain more than 95% under the conditions of temperature, and its high temperature longitudinal fracture intensity reaches 1118N/5cm, and cross-breaking strength reaches
1086N/5cm, the plain polypropylene nitrile pre-oxidized fibers Nomex of relatively the same grammes per square metre improve several times (Fig. 2), with conventional resistance to height
Warm bag-type dusting filtrate approaches, and meets the intensity requirement of bag-type dusting filtrate.
To PM0.3, PM0.5, PM1.0, PM3.0 and PM5.0 filter efficiency compared with plain polypropylene nitrile pre-oxidized fibers
Nomex greatly improves, wherein the filter efficiency to PM1.0 is even more to be improved by 83.7% to 95.3% (Fig. 3).
Normal temperature dynamic dust-filtering is carried out by GB/T 6719 to pre-oxidized polyacrylonitrile fiber high temperature resistant bag-type dusting filtrate
Performance test and 200 DEG C of high temperature dynamic dust-filtering performance tests, as a result show preoxidized polyacrylonitrile prepared by above-mentioned technique
Filter efficiency is basically unchanged fibre fire resistant bag-type dusting filtrate under the high temperature conditions；Relatively common pre-oxidized polyacrylonitrile fiber
Nomex, its dust filtration efficiency have brought up to 99.97% by 99.1% or so, while in the case where initial resistance is larger,
The time that resistance is risen to needed for deashing resistance is nearly 2 times (Fig. 4) for plain polypropylene nitrile pre-oxidized fibers Nomex, 30 times
1000Pa cleaning cycles dust-cleaning efficiency can be improved to 99.7% by 88.3%.The polypropylene that this explanation is prepared through the inventive method
Nitrile pre-oxidized fibers high temperature resistant bag-type dusting filtrate compared with plain polypropylene nitrile pre-oxidized fibers Nomex there is higher filtering to imitate
Rate, more preferable deashing property, and longer service life, can meet the needs of high-temperature bag dust removal filtrate, be applied to
High-temperature bag dust removal filtration art, can be the material cost that pollution control enterprise saves nearly half.
Embodiment two
As shown in fig. 6, the pre-oxidized polyacrylonitrile fiber high temperature resistant bag-type dusting filtrate of the present embodiment, including it is basic unit 1, logical
Cross needling process and the composite fibre that pre-oxidized polyacrylonitrile fiber and polyphenylene sulfide fibre form is become entangled in into the upper and lower surface of basic unit 1
Dust-collecting face fibrous face layer 2 and non-dust-collecting face fibrous face layer 3, polytetrafluorethylecoatings coatings 4 and poly tetrafluoroethylene 5.Polypropylene
Nitrile pre-oxidized fibers length is 60mm, and polyphenylene sulfide fibre length is 80mm, and pre-oxidized polyacrylonitrile fiber is fine with polyphenylene sulfide
Tie up the ratio 60 of mixing:Between 40.The ratio of the grammes per square metre of dust-collecting face fibrous face layer and the grammes per square metre of non-dust-collecting face fibrous face layer is 6:
4, two total grammes per square metres of fibrous face layer are 500g/m2, make the thickness of dust-collecting face fibrous face layer slightly larger than non-dust-collecting face fibrous face layer
Thickness.Basic unit is the low close aramid fiber woven fabric of one layer of base fabric.Dedusting filtrate in dust-collecting face fibrous face layer 2 and non-is met by infusion process
Polytetrafluoroethylgranule granule is adhered on the fiber of dirt face fibrous face layer 3.Dust-collecting face fibrous face layer 2 is provided with poly tetrafluoroethylene 5.
Preparation method is unlike embodiment one：After baking terminates, polytetrafluoroethyl-ne is pasted in dust-collecting face fibrous face layer 2
Alkene film 5.
Embodiment three
Disappear Electrostatic Treatment：The pre-oxidized polyacrylonitrile fiber that length is 50mm is chosen, and the polyphenylene sulfide that length is 75mm
Ether fiber, with 55:35 mass ratio is mixed, and the cationic antistatic agent that mass fraction is 2% is sprayed on fiber, then
Sealing and standing 24 hours at room temperature.
Shredding, combing：Fiber by the Electrostatic Treatment that disappears is subjected to shredding mixed cotton, is sent into carding machine, carding machine tin is set
Woods and doffer's spacing are 0.10mm, and speed is than being 1.4.
Lapping：Fiber presses the lapping of dust-collecting face fibrous face layer/woven aramid fiber base fabric/non-dust-collecting face fibrous face layer after combing
Structure carries out alternately lapping, wherein aramid fiber used in low close aramid fiber woven fabric is aramid fiber 1313, warp thread is with weft yarn line density
45tex, it is 55/10cm through close and filling density, dust-collecting face web grammes per square metre is 360g/m2, non-dust-collecting face web grammes per square metre is
240g/m2。
Acupuncture：Using grammes per square metre as 360g/m2Dust-collecting face towards pricker carry out acupuncture, wherein pre-needling pricker density be 15
Thorn/cm2, depth 4mm, frequency is 80 thorns/min, and output speed 1.5m/min, main acupuncture pricker density is 40 thorns/cm2, it is deep
Spend for 5mm, frequency is 200 thorns/min, output speed 1.5m/min, the resistance to height of pre-oxidized polyacrylonitrile fiber after needling process
Warm bag-type dusting filtrate matrix basic forming.
Spun lacing：Web is directly entered spun-laced machine after acupuncture, and water jet process is：30/cm of spray nozzle density2, pressure is
3MPa, output speed 2.0m/min, grammes per square metre 360g/m2Dust-collecting face towards nozzle.After water jet process is handled, polypropylene
The distribution of nitrile pre-oxidized fibers high temperature resistant bag-type dusting filter media fibre is more uniform, further reduces fiber gap, improves fiber
Part tangles degree, and improves the surface state of filtrate, especially dust-collecting face surface state, can further improve its filter efficiency
With deashing property.
Washing is deoiled and dried：After water jet process, pre-oxidized polyacrylonitrile fiber high temperature resistant bag-type dusting filtrate is carried out
Washing is gone oil processing and dried.
High-temperature heat treatment：Further heat is carried out to the pre-oxidized polyacrylonitrile fiber high temperature resistant bag-type dusting filtrate of drying
Processing, specific to use 4 group of two Roller hot rolling, upper hot rolling Roller temperature is 280 DEG C, and lower hot rolling Roller temperature is 290 DEG C, and wherein dust-collecting face is fine
Dimension surface layer presses close to lower hot rolling Roller, speed 1.5m/min, and hot rolling Roller pressure is stepped up from front to back, the 1st group of hot rolling Roller pressure
Strong is 0.1MPa, and the 2nd group of hot rolling Roller pressure is 0.3MPa, and the 3rd group of hot rolling Roller pressure is 0.6MPa, last group of hot rolling Roller
Pressure be 0.8MPa.Heat treatment makes polyphenylene sulfide fibre partial melting, forms bonding point with pre-oxidized polyacrylonitrile fiber, together
When fill up the excessive hole in part, filter structure can be made more stable, the intensity of filtrate is effectively improved, reduce interfibrous sky
Gap, and make dust-collecting face more smooth.
Dipping：The basic forming of pre-oxidized polyacrylonitrile fiber high temperature resistant bag-type dusting filtrate after heat treatment, to enter
One step improves its filter efficiency, and impregnation technology is carried out to it and is arranged and high temperature baking processing.It is quality specially to impregnate formula of liquid
Fraction：Ptfe emulsion：6%, melamine resin emulsion：6%, water：88%；Foregoing filtrate is put into and stirred
Into the maceration extract of uniform state, ultrasound 1 hour, supersonic frequency 25kHz, temperature is 60 DEG C.
Bakee：Filtrate is sent into ironer after dipping, mangle pick-up is 70%, the preliminary drying 30min under the conditions of 90 DEG C, so
Afterwards 3min is bakeed under the conditions of 160 DEG C.Polytetrafluoroethylene (PTFE) is solidificated in fiber surface by melamine resin, improves fiber
The crude extent on surface, while the tortuous in space is improved, further improve the filter efficiency of filtrate.So far, polyacrylonitrile
Prepared by pre-oxidized fibers high temperature resistant bag-type dusting filtrate completes.
The dedusting media performance of gained is similar to embodiment 1.
Example IV
Disappear Electrostatic Treatment：The pre-oxidized polyacrylonitrile fiber that length is 65mm is chosen, and the polyphenylene sulfide that length is 90mm
Ether fiber, with 65:45 mass ratio is mixed, and the cationic antistatic agent that mass fraction is 5% is sprayed on fiber, then
Sealing and standing 24 hours at room temperature.
Shredding, combing：Fiber by the Electrostatic Treatment that disappears is subjected to shredding mixed cotton, is sent into carding machine, carding machine tin is set
Woods and doffer's spacing are 0.25mm, and speed is than being 1.65.
Lapping：Fiber presses the lapping of dust-collecting face fibrous face layer/woven aramid fiber base fabric/non-dust-collecting face fibrous face layer after combing
Structure carries out alternately lapping, wherein aramid fiber used in low close aramid fiber woven fabric is aramid fiber 1313, warp thread is with weft yarn line density
30tex, it is 75/10cm through close and filling density, dust-collecting face web grammes per square metre is 390g/m2, non-dust-collecting face web grammes per square metre is
260g/m2。
Acupuncture：Using grammes per square metre as 390g/m2Dust-collecting face towards pricker carry out acupuncture, wherein pre-needling pricker density be 25
Thorn/cm2, depth 6mm, frequency is 130 thorns/min, and output speed 2.0m/min, main acupuncture pricker density is 60 thorns/cm2,
Depth is 8mm, and frequency is 280 thorns/min, and output speed 2.0m/min, pre-oxidized polyacrylonitrile fiber is resistance to after needling process
High-temperature bag dust removal filtrate matrix basic forming.
Spun lacing：Web is directly entered spun-laced machine after acupuncture, and water jet process is：50/cm of spray nozzle density2, pressure is
8MPa, output speed 2.0m/min, grammes per square metre 390g/m2Dust-collecting face towards nozzle.After water jet process is handled, polypropylene
The distribution of nitrile pre-oxidized fibers high temperature resistant bag-type dusting filter media fibre is more uniform, further reduces fiber gap, improves fiber
Part tangles degree, and improves the surface state of filtrate, especially dust-collecting face surface state, can further improve its filter efficiency
With deashing property.
Washing is deoiled and dried：After water jet process, pre-oxidized polyacrylonitrile fiber high temperature resistant bag-type dusting filtrate is carried out
Washing is gone oil processing and dried.
High-temperature heat treatment：Further heat is carried out to the pre-oxidized polyacrylonitrile fiber high temperature resistant bag-type dusting filtrate of drying
Processing, specific to use 6 group of two Roller hot rolling, upper hot rolling Roller temperature is 280 DEG C, and lower hot rolling Roller temperature is 290 DEG C, and wherein dust-collecting face is fine
Dimension surface layer presses close to lower hot rolling Roller, speed 1m/min, and hot rolling Roller pressure is stepped up from front to back, the 1st group of hot rolling Roller pressure
For 0.3MPa, the 2nd group of hot rolling Roller pressure is 0.3MPa, and the 3rd group of hot rolling Roller pressure is 0.4MPa, the 4th group of hot rolling Roller pressure
Strong is 0.4MPa, and the 5th group of hot rolling Roller pressure is 0.6Mpa, and last group of hot rolling Roller pressure is 0.8MPa.Heat treatment makes to gather
Sulfide fibers partial melting, bonding point is formed with pre-oxidized polyacrylonitrile fiber, while fills up the excessive hole in part, can be with
Make filter structure more stable, effectively improve the intensity of filtrate, reduce interfibrous space, and make dust-collecting face more smooth.
Dipping：The basic forming of pre-oxidized polyacrylonitrile fiber high temperature resistant bag-type dusting filtrate after heat treatment, to enter
One step improves its filter efficiency, and impregnation technology is carried out to it and is arranged and high temperature baking processing.It is quality specially to impregnate formula of liquid
Fraction：Ptfe emulsion：10%, melamine resin emulsion：9%, water：81%；Foregoing filtrate is put into and stirred
Mix into the maceration extract of uniform state, ultrasound 2 hours, supersonic frequency 30kHz, temperature is 60 DEG C.
Bakee：Filtrate is sent into ironer after dipping, mangle pick-up is 80%, the preliminary drying 30min under the conditions of 90 DEG C, so
Afterwards 3min is bakeed under the conditions of 160 DEG C.Polytetrafluoroethylene (PTFE) is solidificated in fiber surface by melamine resin, improves fiber
The crude extent on surface, while the tortuous in space is improved, further improve the filter efficiency of filtrate.So far, polyacrylonitrile
Prepared by pre-oxidized fibers high temperature resistant bag-type dusting filtrate completes.
The dedusting media performance of gained is similar to embodiment 1.
Claims (10)
1. a kind of pre-oxidized polyacrylonitrile fiber high temperature resistant bag-type dusting filtrate, it is characterized in that, including basic unit and pass through acupuncture
The composite fibre that pre-oxidized polyacrylonitrile fiber and polyphenylene sulfide fibre form is become entangled in what the upper and lower surface of basic unit was formed by technique
Dust-collecting face fibrous face layer and non-dust-collecting face fibrous face layer, the basic unit include at least one layer of base fabric；Described dust-collecting face fiber
The thickness of surface layer is more than the thickness of non-dust-collecting face fibrous face layer, in described dust-collecting face fibrous face layer or non-dust-collecting face fibrous face layer
The length of polyphenylene sulfide fibre be longer than the length of pre-oxidized polyacrylonitrile fiber.
2. pre-oxidized polyacrylonitrile fiber high temperature resistant bag-type dusting filtrate according to claim 1, it is characterized in that, it is described
Pre-oxidized polyacrylonitrile fiber length is 50-65mm, and described polyphenylene sulfide fibre length is 75-90mm, described polypropylene
Nitrile pre-oxidized fibers and the ratio 65 of polyphenylene sulfide fibre mixing:35 to 55:Between 45；The base fabric includes but is not limited to low close
Aramid fiber woven fabric.
3. pre-oxidized polyacrylonitrile fiber high temperature resistant bag-type dusting filtrate according to claim 1 or 2, it is characterized in that, institute
State and be stained with polytetrafluoroethylgranule granule on the fiber of dust-collecting face fibrous face layer and non-dust-collecting face fibrous face layer；The dust-collecting face
Fibrous face layer is provided with least one layer of poly tetrafluoroethylene.
A kind of 4. preparation side of the pre-oxidized polyacrylonitrile fiber high temperature resistant bag-type dusting filtrate described in any one of claim 1-3
Method, it is characterized in that, composite fibre is formed with polyphenylene sulfide fibre by major ingredient of pre-oxidized polyacrylonitrile fiber, it is quiet by disappearing successively
After electric treatment, shredding, combing, lapping formation dust-collecting face fibrous face layer/base fabric/non-dust-collecting face fibrous face layer is carried out in base fabric
Lapping structure, wherein the thickness of the dust-collecting face fibrous face layer is slightly larger than non-dust-collecting face fibrous face layer, carry out successively afterwards acupuncture,
Oil processing, drying, high-temperature heat treatment, dipping and baking are gone in spun lacing, washing, finally obtain bag-type dusting filtrate.
5. the preparation method of pre-oxidized polyacrylonitrile fiber high temperature resistant bag-type dusting filtrate according to claim 4, it is special
Sign is, described pre-oxidized polyacrylonitrile fiber length is 50-65mm, and described polyphenylene sulfide fibre length is 75-90mm, institute
The ratio 65 for pre-oxidized polyacrylonitrile fiber and the polyphenylene sulfide fibre mixing stated:35 to 55:Between 45；The base fabric include but
It is not limited to low close aramid fiber woven fabric.
6. the preparation method of the pre-oxidized polyacrylonitrile fiber high temperature resistant bag-type dusting filtrate according to claim 4 or 5, its
It is characterized in, the Electrostatic Treatment process that disappears is：Quality is sprayed on the pre-oxidized polyacrylonitrile fiber and polyphenylene sulfide fibre
Fraction is 2-5% cationic antistatic agent, then sealing and standing 24 hours at room temperature.
7. the preparation method of pre-oxidized polyacrylonitrile fiber high temperature resistant bag-type dusting filtrate according to claim 6, it is special
Sign is that the spacing of cylinder and doffer are 0.10-0.25mm in described carding process, and fast ratio is 1.4-1.65；Described lapping
Process be：Establish the lapping structure of dust-collecting face fibrous face layer/base fabric/non-dust-collecting face fibrous face layer, wherein dust-collecting face fibrous face
The ratio of the grammes per square metre of layer and the grammes per square metre of non-dust-collecting face fibrous face layer is 6:4, two total grammes per square metres of fibrous face layer are 500-650g/m2。
8. the preparation method of pre-oxidized polyacrylonitrile fiber high temperature resistant bag-type dusting filtrate according to claim 6, it is special
Sign is that described acupuncture course is divided into pre-needling and main two processes of acupuncture；Wherein, the pre-needling pricker density is 15-25
Thorn/cm2, depth 4-6mm, frequency is 80-130 thorns/min, output speed 1.5-2.0m/min；The main acupuncture pricker is close
Spend for 40-60 thorns/cm2, depth 5-8mm, frequency is 200-280 thorns/min, output speed 1.5-2.0m/min；Described
The spray nozzle density that spun lacing process uses is 30-50/cm2, pressure 3-8MPa, output speed 1.5-2.0m/min.
9. the preparation method of pre-oxidized polyacrylonitrile fiber high temperature resistant bag-type dusting filtrate according to claim 6, it is special
Sign is that described high-temperature heat treatment is carried out by the way of multiple two Roller hot rollings, using the Roller hot rollings of 4-6 groups two, hot rolling Roller temperature
Zonal control, upper hot rolling Roller temperature are 280 DEG C, and lower hot rolling Roller temperature is 290 DEG C, and wherein dust-collecting face fibrous face layer presses close to lower hot rolling
Roller, speed 1-1.5m/min, hot rolling Roller pressure are stepped up from front to back, and first group of hot rolling Roller pressure is 0.1-
0.3MPa, last group of hot rolling Roller pressure are 0.6-0.8MPa；Described dipping process is：Formula of liquid is impregnated for quality point
Number：Ptfe emulsion 5%-10%, melamine resin emulsion 6%-9%, surplus is water；Filtrate is put into and stirred
Mix into the maceration extract of uniform state, ultrasonic 1-2 hours, supersonic frequency 2530kHz, temperature is 60 DEG C；It is described to bakee specifically
For mangle pick-up is 60-80%, the preliminary drying 30min under the conditions of 90 DEG C, then bakees 3min under the conditions of 160 DEG C.
10. the preparation method of pre-oxidized polyacrylonitrile fiber high temperature resistant bag-type dusting filtrate according to claim 6, it is special
Sign is, when the dedusting filtrate also includes poly tetrafluoroethylene, after terminating to bakee process, is glued in dust-collecting face fibrous face layer
Paste poly tetrafluoroethylene.
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