CN100425332C - Preparation method of membrane-covered filter material for high-temperature flue gas/dust integrated treatment - Google Patents
Preparation method of membrane-covered filter material for high-temperature flue gas/dust integrated treatment Download PDFInfo
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- CN100425332C CN100425332C CNB2006101550521A CN200610155052A CN100425332C CN 100425332 C CN100425332 C CN 100425332C CN B2006101550521 A CNB2006101550521 A CN B2006101550521A CN 200610155052 A CN200610155052 A CN 200610155052A CN 100425332 C CN100425332 C CN 100425332C
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- coated filter
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Abstract
The invention relates to a method for preparing membrane filter material used in high-temperature smoke/dust treatment, wherein said method comprises that: loosing, mixing, feeding, combing, layering, needling, and steaming at high temperature on expanded politef staple fiber and other temperature-resistance fiber, into high-temperature-resistant support material; compositing it with politef porous film at high temperature. The invention can be used to dedust the high-temperature tail gas and decompose waste gas, with low cost and non pollution.
Description
Technical field
The present invention relates to the technical field of filtering material, a kind of high-temperature flue gas and the dust integrated processing preparation method with coated filter material is provided particularly.
Background technology
At present, what use always the most in the high-temperature-resistant filtering material is glass fibre, its long filament is made into fabric or chopped fiber needle-punched one-tenth nonwoven, and be processed into sack cleaner and use, glass fibre can use under 260 ℃ of temperature for a long time, but the folding resistance of glass fibre is relatively poor, under more frequent blowback condition, breakage is very fast, thereby has reduced its service life.
For this reason, people such as Sun Xi, Liu Guangri (application number 200510046547.6, composite fibre high-temperature-resistant filtering material manufacture method) disclosing a kind of is the manufacture method of the high-temperature filter material of raw material with the composite fibre, include polytetrafluoroethylene fibre, and comprise together that with polytetrafluoroethylene fibre other high-temperature fibres such as glass fibre, polyimide fiber or polyphenylene sulfide fibre are also twisted with the fingers or high-temperature filter material is made in blending.Involved fiber comprises long fibre and short fiber.High-temperature filter material in this invention can be that filter cloth also can be Nomex or Nomex base cloth.When using long fibre to make high-temperature filter material, can adopt and twist with the fingers that technology is made the polytetrafluoroethylene (PTFE) covering yarn or wrap yarn is weaved cotton cloth; But and when using short fiber blending become yarn weave cotton cloth or directly comb make Nomex.Adopt to mix, feed cotton, all cotton, combings, fold net, pre-needling, main acupuncture, have a shave, thermal finalization, singe, operation such as press polish processes.
Yu Yueping, anxiety people's (application number 200610050581.5, producing technology of non-woven fabrics and with the method for this handicraft product making flue filtering material) such as are grasped and are disclosed a kind of to comprise the nonwoven that glass fibre, metallic fiber etc. process at interior heatproof strengthening material.This preparation method is: add the non-woven material and the heatproof strengthening material of short fiber in container, the thawing of heating mixes combing, acupuncture, cooling, compression moulding.
More than two inventions all be that fiber process is become nonwoven, use as filtering material.For improving filter efficiency and precision, the someone adopts the method for ptfe composite microporous membrane on backing material.
" method for making of air filting material, filter assemblies and filter and air filting material " discloses polytetrafluoroethylporous porous membrane in (ZL00128696.X) and pressed the processing method of the air filting material that the gas permeability backing material constitutes on its at least one face upper strata.
" manufacture method of polytetrafluoroethylene (PTFE) supported composite filtering film and the manufacturing installation of use " (application number 200510023193.3) discloses a kind of manufacture method of polytetrafluoroethylene (PTFE) supported composite filtering film and the manufacturing installation of use, this device is fit to fusing points such as polypropylene mesh, polyester non-woven fabric, nylon screen and is lower than the hot compound of 300 ℃ backing material and polytetrafluoroethylene (PTFE), is not suitable for the backing material of glass fibre, polytetrafluoroethylene fibre, polyimide fiber or polyphenylene sulfide fibre etc.
Relate to improvement in " high temperature resistant polytetrafluoroethylene (PTFE) coated filter material " (application number 200510094768.0): at first the glass fibre base cloth is carried out impregnation process, carry out high temperature hot pressing with the ptfe surface film then with post-treatment agent to existing polytetrafluoroethylcomposite composite film filtering material.Film forming agent emulsion, fluorine containing silane coupling agent and fluoropolymer emulsions form thin film in the invention on the glass fibre base cloth, that this film not only improves is antifouling, hate oil, antiseptic effect, and fusion can take place and is laminated with in it and expanding microporous polytetrafluoroethylene (PTFE) film under the high temperature hot pressing condition, thereby solved the difficult problem that this organic inert material fusion of this inorganic material of glass fibre and polytetrafluoroethylene (PTFE) is laminated with effectively, made the two be laminated with firmness and improve greatly.
More than the related material of invention all is used for the dedusting field, though do not describe the efficiency of dust collection of final material, from the The Nomenclature Composition and Structure of Complexes of material, should reach a higher dedusting level more.But this class material does not have the effect of decomposition substantially for such as waste gas such as dioxin, nitrogen oxide, sulfide, and reason is that material internal does not exist the component that any effect takes place with these waste gas.
Along with the fast development of countries in the world modern industrialization process, atmosphere pollution has become a serious day by day global problem, and exhaust gas discharging such as dioxin, furans, nitrogen oxide, sulfide and control obtain the attention of countries in the world.The denomination of invention of applicant's application is " preparation method who is used for the expanded polytetrafluoroethylfiber fiber of waste gas decomposition ", application number is 200610154943.5, a kind of preparation method who is used for the expanded polytetrafluoroethylfiber fiber of waste gas decomposition is disclosed, this method is that the decomposition catalyst powder that will be used for waste gas is mixed into fibrous raw material, and processes fiber.
The denomination of invention of applicant's application is " being used for polytetrafluoroethylfilm film hardening and heat composite apparatus ", application number is 200610154944.X, the Nomex backing material that short fibers such as a kind of glass fibre, polyimides, polytetrafluoroethylene (PTFE), polyphenylene sulfide make and the heat composite apparatus of polytetrafluoroethylene film are disclosed, this device relies on high temperature fully makes polytetrafluoroethylene film be in the semi-molten state, and then takes place hot compound with the Nomex backing material.This material can be used for high-temperature dust removal bag coated filter material.
Therefore, application number is that Nomex preparation method operation in 200510046547.6 and 200610050581.5 is more; Patent ZL00128696.X and application number are to make the backing material fusion in 200510023193.3, and then bonding with polytetrafluoroethylene film; Application number is then mainly to adopt post-treatment agent that the glass fibre base cloth is carried out impregnation process in 200510094768.0, and then heat is compound.
Summary of the invention
The purpose of this invention is to provide a kind of high-temperature flue gas and the dust integrated processing preparation method with coated filter material, this method is that expanded polytetrafluoroethylfiber fiber, other high-temperature fibres that will be used for the waste gas decomposition are processed into high temperature resistant backing material through operations such as shreddings, mixing, feed, combing, fibre web, folded net, pre-needling, main acupuncture, high temperature decatizes; At high temperature be composited again with polytetrafluoroethylmicroporous microporous membrane.
The technical solution adopted for the present invention to solve the technical problems is that this method may further comprise the steps:
The preparation of a, high temperature resistant backing material
Adopt the needle punched non-woven fabrics process equipment, expanded PTFE short fiber and other high temperature resistant short fibers that will be used for the waste gas decomposition are processed into Nomex through shreddings, mixing, feed, combing, fibre web, folded net, pre-needling and main acupuncture operation, decatize under 105 ℃ of temperature is processed into high temperature resistant backing material again;
The preparation of b, coated filter material
Described high temperature resistant backing material and polytetrafluoroethylmicroporous microporous membrane heat is compound, be processed into high-temperature flue gas and dust integrated processing coated filter material.
Among the described step a, other high temperature resistant short fibers comprise a kind of or its mixing in glass fibre, polytetrafluoroethylene fibre, polyimide fiber or the polyphenylene sulfide fibre.
Among the described step a, the expanded PTFE short fiber weight that is used for the waste gas decomposition is 1 part, and the weight of other high temperature resistant short fibers is 0.2～10 part.
Among the described step a, the weight per square meter of high temperature resistant backing material be 100～300 the gram/square metre.
Among the described step b, polytetrafluoroethylmicroporous microporous membrane adopts the biaxial tension method of forming to prepare, and micropore size is 0.3～8 micron, 5～20 microns of thickness.
Among the described step b, hot combined temp is 330～400 ℃, and pressure is 4～6 kg/cm, and the speed of service is 3～6 meters/minute.
In the described a step, " preparation method who is used for the expanded polytetrafluoroethylfiber fiber of waste gas decomposition ", application number is 200610154943.5, the expanded PTFE short fiber that waste gas decomposes adopts following method preparation:
(1) expanded PTFE resin and catalyst powder are mixed, adopt 10 mesh sieves to sieve, sieve 3～5 times, prepare the powder mixture that sieves;
(2) lubricant is joined in the described powder mixture that sieves, place the capacity container that has airtight stopper to mix, mix for promoting, 1/3～2/3 space of container capacity keeps idle, after the mixing, hermetic seals this container to prevent the lubricant volatilization;
(3) mix after, shake this container 30 minutes with dispersed lubricant, leave standstill, toner is fully mixed, slaking then, formation expanded PTFE mixed material with fluid lubricant;
(4) with described expanded PTFE mixed material at 1kg/cm
2Pressure under, suppressed 1 minute, form cylindrical blank, blank diameter 10mm, long 25mm, and then extrude formation expanded PTFE monofilament with Shimazu flowing experiment instrument CFT-500 plunger;
(5) with described expanded PTFE monofilament oven dry, to remove lubricant, stretch then, last thermal finalization obtains to be used for the expanded polytetrafluoroethylfiber fiber that waste gas decomposes.
In the described b step, " being used for polytetrafluoroethylfilm film hardening and heat composite apparatus ", application number is 200610154944.X, used hot equipment complex:
A. polytetrafluoroethylfilm film hardening device: the first-class branch of same circumference in hot-rolling inside is equipped with electric heating tube, the rotating shaft of hot-rolling both sides is embedded on the interior bearing of two side stands, two conductive plates are installed in respectively in the rotating shaft of both sides, electric heating tube one end is connected with conductive plate by lead, all electric heating tubes are and are connected in parallel, and an end connects the positive pole of power supply, and the other end connects power cathode, described hot-rolling and conductive plate rotate synchronously, and conductive plate is provided with the friction electric installation;
B. the high-temperature dust removal bag is with the heat composite apparatus of coated filter material: a high-temperature-resisting silicon rubber roller is set above hot-rolling, outside dimension and hot-rolling are identical, the both sides rotating shaft of high-temperature-resisting silicon rubber roller is embedded on another interior bearing of another two side stand, and another two side stand of hot-rolling is connected with spring of the same type respectively with another two side stand of high-temperature-resisting silicon rubber roller.
The present invention compares the beneficial effect that has with background technology:
(1) compares with application number 200510046547.6 Nomex preparation methods, omitted in the high temperature resistant backing material process among the present invention have a shave, thermal finalization, singe, operation such as press polish, only adopt that the decatize operation just can make high temperature resistant backing material reach result preferably under 105 ℃ of temperature, preparation section is simplified greatly.
(2) with patent ZL00128696.X and application number 200510023193.3 in make the backing material fusion, and then it is different fully with the bonding hot complex method of polytetrafluoroethylene film, high-temperature flue gas and dust integrated processing are with in the preparation process of coated filter material among the present invention, be under 330～400 ℃ high temperature, make the polytetrafluoroethylmicroporous microporous membrane partial melting, and then heat is compound under pressure, adopts this technology can guarantee that the filtering material of processing can be in the medium-term and long-term use of high-temperature flue gas environment.
(3) with application number 200510094768.0 in method relatively, omitted operations such as glass fibre base cloth impregnation process, thus the technology of the present invention to have operation easy, advantage such as production cost is low, need not use simultaneously the post-treatment agent dipping, avoid the pollution that environment is brought because of post-treatment agent yet.
(4) proprietary material of the present invention and previous patent are relatively, Nomex, coated filter material in the previous patent are only held back dust, there is not the decomposition effect for waste gas, the expanded PTFE short fiber of the material for preparing in the patent of the present invention because of having used waste gas to decompose has the effect of integrated processing to high-temp waste gas and dust.
The specific embodiment
Embodiment 1:
The preparation of a, high temperature resistant backing material
Adopt conventional needle punched non-woven fabrics process equipment, to be used for expanded PTFE short fiber (60 microns of the fibre diameters that waste gas decomposes, fiber porosity 85%, catalyst wherein is the O4-85 of BASF AG) 1 kilogram, be processed into Nomex with operations such as the shredding of 0.2 kilogram of process of glass short fiber, mixing, feed, combing, fibre web, folded net, pre-needling, main acupunctures, decatize under 105 ℃ of temperature again, be processed into weight per square meter and be 100 grams/square metre high temperature resistant backing material;
The preparation of b, coated filter material
With described high temperature resistant backing material and polytetrafluoroethylmicroporous microporous membrane (available from Shanghai Linflon Film Technology Co., Ltd., micropore size is 0.3 micron, 5 microns of thickness,) be 330 ℃ in temperature, pressure is compound under the condition of 4 kg/cm, the speed of service of backing material and film is 3 meters/minute, is processed into high-temperature flue gas and dust integrated processing coated filter material.
High-temperature flue gas that obtains by said method and dust integrated processing with coated filter material to the clearance of dust up to 99.999%, the clearance to nitrogen oxide under 210 ℃ temperature reaches 97%.
Embodiment 2:
The preparation of a, high temperature resistant backing material
Adopt conventional needle punched non-woven fabrics process equipment, to be used for expanded PTFE short fiber (130 microns of the fibre diameters that waste gas decomposes, fiber porosity 72%, catalyst wherein is the O4-86 of BASF AG) 1 kilogram, be processed into Nomex with operations such as 2 kilograms of polytetrafluoroethylene (PTFE) short fibers, the shredding of 2 kilograms of processes of polyimides short fiber, mixing, feed, combing, fibre web, folded net, pre-needling, main acupunctures, decatize under 105 ℃ of temperature again, be processed into weight per square meter and be 200 grams/square metre high temperature resistant backing material;
The preparation of b, coated filter material
With described high temperature resistant backing material and polytetrafluoroethylmicroporous microporous membrane (available from Shanghai Linflon Film Technology Co., Ltd., micropore size is 5 microns, 10 microns of thickness) it is 360 ℃ in temperature, pressure is compound under the condition of 5 kg/cm, the speed of service of backing material and film is 5 meters/minute, is processed into high-temperature flue gas and dust integrated processing coated filter material.
High-temperature flue gas that obtains by said method and dust integrated processing with coated filter material to the clearance of dust up to 99.999%, clearance to dioxin under 210 ℃ temperature reaches 93%, clearance to furans reaches 95%, and the clearance of nitrogen oxide is reached 92%.
Embodiment 3:
The preparation of a, high temperature resistant backing material
Adopt conventional needle punched non-woven fabrics process equipment, to be used for expanded PTFE short fiber (250 microns of the fibre diameters that waste gas decomposes, fiber porosity 68%, titanium/vanadium catalyst that catalyst is wherein produced for CRI company) 1 kilogram, be processed into Nomex with operations such as the shredding of 10 kilograms of processes of polyphenylene sulfide short fiber, mixing, feed, combing, fibre web, folded net, pre-needling, main acupunctures, decatize under 105 ℃ of temperature again, be processed into weight per square meter and be 300 grams/square metre high temperature resistant backing material;
The preparation of b, coated filter material
With described high temperature resistant backing material and polytetrafluoroethylmicroporous microporous membrane (available from Shanghai Linflon Film Technology Co., Ltd., micropore size is 8 microns, 20 microns of thickness) it is 400 ℃ in temperature, pressure is compound under the condition of 6 kg/cm, the speed of service of backing material and film is 6 meters/minute, is processed into high-temperature flue gas and dust integrated processing coated filter material.
High-temperature flue gas that obtains by said method and dust integrated processing with coated filter material to the clearance of dust up to 99.99%, clearance to dioxin under 210 ℃ temperature reaches 94%, clearance to furans reaches 90%, and the clearance of nitrogen oxide is reached 88%.
Embodiment 4:
The preparation of a, high temperature resistant backing material
Adopt conventional needle punched non-woven fabrics process equipment, to be used for expanded PTFE short fiber (200 microns of the fibre diameters that waste gas decomposes, fiber porosity 73%, catalyst wherein is the O4-86 of BASF AG) 1 kilogram, be processed into Nomex with operations such as 4 kilograms in glass fibre, the shredding of 4 kilograms of processes of polyphenylene sulfide short fiber, mixing, feed, combing, fibre web, folded net, pre-needling, main acupunctures, decatize under 105 ℃ of temperature again, be processed into weight per square meter and be 250 grams/square metre high temperature resistant backing material;
The preparation of b, coated filter material
With described high temperature resistant backing material and polytetrafluoroethylmicroporous microporous membrane (available from Shanghai Linflon Film Technology Co., Ltd., micropore size is 8 microns, 10 microns of thickness) it is 360 ℃ in temperature, pressure is compound under the condition of 5 kg/cm, the speed of service of backing material and film is 5 meters/minute, is processed into high-temperature flue gas and dust integrated processing coated filter material.
High-temperature flue gas that obtains by said method and dust integrated processing with coated filter material to the clearance of dust up to 99.99%, clearance to dioxin under 210 ℃ temperature reaches 90%, clearance to furans reaches 95%, and the clearance of nitrogen oxide is reached 92%.
Described embodiment of the present invention now in detail, clearly can do a lot of improvement and variation for a person skilled in the art and can not deviate from essence spirit of the present invention.All these changes and improvements think all within the scope of the present invention that its feature is determined by above-mentioned specification.
Claims (6)
1. a high-temperature flue gas and dust integrated processing are with the preparation method of coated filter material, and this method may further comprise the steps:
The preparation of a, high temperature resistant backing material
Adopt the needle punched non-woven fabrics process equipment, expanded PTFE short fiber and other high temperature resistant short fibers that will be used for the waste gas decomposition are processed into Nomex through shreddings, mixing, feed, combing, fibre web, folded net, pre-needling and main acupuncture operation, decatize under 105 ℃ of temperature is processed into high temperature resistant backing material again;
The preparation of b, coated filter material
Described high temperature resistant backing material and polytetrafluoroethylmicroporous microporous membrane heat is compound, be processed into high-temperature flue gas and dust integrated processing coated filter material.
2. according to the described a kind of high-temperature flue gas of claim 1 and dust integrated processing preparation method with coated filter material, it is characterized in that among the described step a that other high temperature resistant short fibers comprise a kind of or its mixing in glass fibre, polytetrafluoroethylene fibre, polyimide fiber or the polyphenylene sulfide fibre.
3. according to the described a kind of high-temperature flue gas of claim 1 and dust integrated processing preparation method with coated filter material, it is characterized in that among the described step a, the expanded PTFE short fiber weight that is used for the waste gas decomposition is 1 part, and the weight of other high temperature resistant short fibers is 0.2～10 part.
4. according to the described a kind of high-temperature flue gas of claim 1 and dust integrated processing preparation method, it is characterized in that among the described step a with coated filter material, the weight per square meter of high temperature resistant backing material be 100～300 grams/square metre.
5. according to the described a kind of high-temperature flue gas of claim 1 and dust integrated processing preparation method with coated filter material, it is characterized in that among the described step b, polytetrafluoroethylmicroporous microporous membrane adopts the preparation of the biaxial tension method of forming, and micropore size is 0.3～8 micron, 5～20 microns of thickness.
6. according to the described a kind of high-temperature flue gas of claim 1 and dust integrated processing preparation method with coated filter material, it is characterized in that among the described step b, hot combined temp is 330～400 ℃, and pressure is 4～6 kg/cm, and the speed of service is 3～6 meters/minute.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2006101550521A CN100425332C (en) | 2006-12-07 | 2006-12-07 | Preparation method of membrane-covered filter material for high-temperature flue gas/dust integrated treatment |
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| CNB2006101550521A CN100425332C (en) | 2006-12-07 | 2006-12-07 | Preparation method of membrane-covered filter material for high-temperature flue gas/dust integrated treatment |
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| CN1994538A CN1994538A (en) | 2007-07-11 |
| CN100425332C true CN100425332C (en) | 2008-10-15 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102008855B (en) * | 2010-11-16 | 2012-09-12 | 浙江格尔泰斯纺织染整有限公司 | Method for producing PTFE membrane-laminated filter material |
| CN103394296B (en) * | 2013-07-18 | 2015-10-21 | 湖州森诺氟材料科技有限公司 | A kind of polytetrafluoroethylene (PTFE) ultra micro water filtration film for flat MBR and preparation method thereof |
| CN107233764A (en) * | 2017-06-29 | 2017-10-10 | 安徽天顺环保设备股份有限公司 | A kind of high-performance PTFE membrane filter material and preparation method for filling nanometer micropore activated silica |
| CN107961619B (en) * | 2017-12-11 | 2021-02-09 | 中材科技膜材料（山东）有限公司 | Preparation method of multifunctional membrane-covered filter material |
| CN113797650A (en) * | 2021-08-25 | 2021-12-17 | 安徽元琛环保科技股份有限公司 | Preparation method of PTFE (polytetrafluoroethylene) filtering material with high catalyst loading rate |
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Application publication date: 20070711 Assignee: Nanjing Jihua 3521 Special Equipment Co., Ltd. Assignor: Zhejiang Sci-Tech University Contract record no.: 2010320000378 Denomination of invention: Preparation method of membrane-covered filter material for high-temperature flue gas/dust integrated treatment Granted publication date: 20081015 License type: Exclusive License Record date: 20100409 |
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