CN101862567B - High-temperature resistant fiber layer composite filter material and method for preparing same - Google Patents

High-temperature resistant fiber layer composite filter material and method for preparing same Download PDF

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CN101862567B
CN101862567B CN2010102147426A CN201010214742A CN101862567B CN 101862567 B CN101862567 B CN 101862567B CN 2010102147426 A CN2010102147426 A CN 2010102147426A CN 201010214742 A CN201010214742 A CN 201010214742A CN 101862567 B CN101862567 B CN 101862567B
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composite filter
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ptfe
fiber layer
fiber
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CN101862567A (en
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张延青
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张延青
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Abstract

The invention discloses a high-temperature resistant fiber layer composite filter material and a method for preparing the same. The cross section of the material adopts a triple-layer structure, the upper layer and the lower layer are both a mixed fiber layer, and the middle layer is the PTFE base fabric layer. The preparation comprises the following steps of: preparing PPS fibers and PTFE fibers for later use; mixing two kinds of raw materials in a cotton-mixing box to obtain a preliminary mixed material; loosening the preliminary mixed material in a loosening machine; performing refined mixing of the loosened material in the cotton-mixing box; carding the refined mixing material into planar network fibers by a carding machine; spreading the planar network fibers by a lapping machine to make the mixed fiber layers; adding the PTFE base fabric layer between the two mixed fiber layers; preparing the composite fiber material by a needling machine; and putting the composite fiber material in shaping equipment for shaping, putting the composite fiber material in coating equipment for coating, and then performing surface singeing treatment to obtain the filter material. The filter material of the invention possesses high thermal stability, chemical stability, corrosion resistance and electrical property, and compared with the conventional materials, the oxidation resistance and the corrosion resistance of the filter material are greatly improved.

Description

A kind of high-temperature resistant fiber layer composite filter material and preparation method thereof
Technical field
The present invention relates to a kind of filtering material, specifically a kind of high-temperature resistant fiber layer composite filter material and preparation method thereof.
Background technology
PPS fiber formal name used at school polyphenylene sulfide (Polyphenylene Sulfide; PPS) be to propose in 1897 by Grenvesse; U.S. Phillips oil company is the resin material of suitability for industrialized production at first in 1973; Have good heat endurance, chemical stability, corrosion resistance and electrical property, be widely used in industry-by-industry, be described as the sixth-largest engineering plastics.But the Nomex filter bag long-term work that is processed by its chopped strand is in below 190C °, in the flue gas environment of moment overtemperature 200C °; PPS fiber material filter bag has become the main material of current coal-burning power plant's dedusting filter bag at present; But in recent years along with domestic coal-burning power plant uses the variation of coal raw material and the development and change of cleaner; The filtrate of PPS material can't satisfy the production needs having occurred increasing problem aspect non-oxidizability and the corrosion resistance.
Summary of the invention
The purpose of this invention is to provide a kind of high-temperature resistant fiber layer composite filter material and preparation method thereof; This material adopts PPS fiber and PTFE fiber as raw material; Make it have good heat endurance, chemical stability, corrosion resistance and electrical property, and have a greater degree of improvement at relative current material aspect non-oxidizability and the corrosion resistance.
The present invention is for realizing above-mentioned purpose; Realize through following technical scheme: its section is a three-decker; The upper and lower are mixed fiber layer; Between the upper and lower PTFE base cloth layer, the employed raw materials by weight meter of mixed fiber layer, PPS fiber 60-80% and PTFE fiber 20-40%.The employed raw materials by weight meter of mixed fiber layer, PPS fiber 70% and PTFE fiber 30%.
The preparation method of a kind of high-temperature resistant fiber layer composite filter material of the present invention, its processing step is following:
1. it is subsequent use to get the PPS fiber according to the 60-80% of mixed fiber layer raw material gross weight, and it is subsequent use to get the PTFE fiber by the 20-40% of mixed fiber layer raw material gross weight;
2. the two kind raw materials of step in are 1. inserted in the blending box and mix, obtain thick batch mixing;
3. thick batch mixing is inserted opener and carry out the shredding processing;
4. the raw material after the 3. middle shredding of step is inserted blending box and mix, obtain meticulous compound;
5. meticulous compound is carded to the plane reticular fibre through carding machine;
6. use the lapping machine that the netted fiber lay down in plane is become mixed fiber layer, get two-layer mixed fiber layer, and between two-layer mixed fiber layer, add the PTFE base cloth layer, constitute composite filter;
7. adopt needing machine that the upper and lower surface of composite filter is carried out the acupuncture processing, process composite filter material;
8. composite filter material is inserted in the PTFE emulsion after the dilution and soak, the volume ratio of PTFE emulsion and water is 1 in the PTFE emulsion after the dilution: 7-10;
9. the composite filter material after will soaking is inserted and is carried out high-temperature shaping in the modular system, and the setting temperature in the modular system is 220 ℃-280 ℃, the speed of travel of composite filter material in modular system be 4.5-5.5 rice/minute;
10. the composite filter material after will finalizing the design is inserted to scrape and is adopted coating liquid to carry out surface-coated in the automatic doubler surface glouer, forms the PTFE coat film on the composite filter material surface, and coating liquid is the PTFE emulsion after diluting, and wherein the volume ratio of PTFE emulsion and water is 1: 3-5;
Composite filter material after will apply is inserted the equipment of singing and is carried out the surface processing of singing, and promptly can be made into a kind of high-temperature resistant fiber layer composite filter material of the present invention.
The needing machine of said step described in 7. is seven; Wherein the needing machine of composite filter upper surface acupuncture and needing machine to the acupuncture of composite filter lower surface are staggered, depth of needling is followed successively by from front to back: 15mm, 13mm, 11mm, 9mm, 7mm, 5mm and 3mm.
The invention has the advantages that: a kind of high-temperature resistant fiber layer composite filter material of the present invention has good heat endurance, chemical stability, corrosion resistance and electrical property; And have a greater degree of improvement etc. at relative current material aspect non-oxidizability and the corrosion resistance; With the coal-burning power plant is example; After using a kind of high-temperature resistant fiber layer composite filter material of the present invention, can make the filtrate corrosion fatigue life prolong more than 2 years.
Description of drawings
Fig. 1 is the structural representation of a kind of high-temperature resistant fiber layer composite filter material according to the invention, and Fig. 2 is the A-A sectional structure sketch map of Fig. 1.
The specific embodiment
A kind of high-temperature resistant fiber layer composite filter material of the present invention; Its section is a three-decker; The upper and lower are mixed fiber layer 1; Between the upper and lower PTFE base cloth layer 2, mixed fiber layer 1 employed raw materials by weight meter, PPS fiber 60-80% and PTFE fiber 20-40%.Wherein the PPS fiber has good heat endurance and chemical stability; The PTFE fiber has excellent chemical stability, corrosion resistance and good non-oxidizability; The present invention has made full use of the advantage of PPS fiber and PTFE fiber self; Solved the problem that the employed dedusting filter bag in existing coal-burning power plant exists aspect non-oxidizability and corrosion resistance, PTFE base cloth layer 2 can strengthen the tensile strength and the elasticity of composite filter material self, helps the service life of elongate composite filtering material.
PPS fiber and PTFE fiber preferably are combined as in the mixed fiber layer 1 of the present invention: mixed fiber layer 1 employed raw materials by weight meter, PPS fiber 70% and PTFE fiber 30%.Through check; This preferred compositions has best high temperature resistant, corrosion-resistant and non-oxidizability; And filter effect is better; Certainly, the combination of PPS fiber and PTFE fiber for example can also be adopted PTFE fiber combinations, 80% PPS fiber and 20% the multiple compound modes such as PTFE fiber combinations of 60% PPS fiber and 40% in PPS fiber of the present invention and the PTFE fiber mixing layer 1, all can realize goal of the invention of the present invention.
The weight combinations embodiment of mixed fiber layer 1 raw material of the present invention:
1, contains 70kgPPS fiber and 30kgPTFE fiber in the raw material of every 100kg mixed fiber layer 1.
2, contain 75kgPPS fiber and 25kgPTFE fiber in the raw material of every 100kg mixed fiber layer 1.
3, contain 80kgPPS fiber and 20kgPTFE fiber in the raw material of every 100kg mixed fiber layer 1.
4, contain 65kgPPS fiber and 35kgPTFE fiber in the raw material of every 100kg mixed fiber layer 1.
5, contain 60kgPPS fiber and 40kgPTFE fiber in the raw material of every 100kg mixed fiber layer 1.
The preparation method of a kind of high-temperature resistant fiber layer composite filter material of the present invention, its processing step is following:
1. it is subsequent use to get the PPS fiber according to the 60-80% of mixed fiber layer 1 raw material gross weight, and it is subsequent use to get the PTFE fiber by the 20-40% of mixed fiber layer 1 raw material gross weight;
2. the two kind raw materials of step in are 1. inserted in the blending box and mix, obtain thick batch mixing;
3. thick batch mixing is inserted opener and carry out the shredding processing;
4. the raw material after the 3. middle shredding of step is inserted blending box and mix, obtain meticulous compound;
5. meticulous compound is carded to the plane reticular fibre through carding machine;
6. use the lapping machine that the netted fiber lay down in plane is become mixed fiber layer 1, get two-layer mixed fiber layer 1, and between two-layer mixed fiber layer 1, add PTFE base cloth layer 2, constitute composite filter;
7. adopt needing machine that the upper and lower surface of composite filter is carried out the acupuncture processing, process composite filter material;
8. composite filter material is inserted in the PTFE emulsion after the dilution and soak, the volume ratio of PTFE emulsion and water is 1 in the PTFE emulsion after the dilution: 7-10;
9. the composite filter material after will soaking is inserted and is carried out high-temperature shaping in the modular system, and the setting temperature in the modular system is 220 ℃-280 ℃, the speed of travel of composite filter material in modular system be 4.5-5.5 rice/minute;
10. the composite filter material after will finalizing the design is inserted to scrape and is adopted coating liquid to carry out surface-coated in the automatic doubler surface glouer, forms the PTFE coat film on the composite filter material surface, and coating liquid is the PTFE emulsion after diluting, and wherein the volume ratio of PTFE emulsion and water is 1: 3-5;
Composite filter material after will apply is inserted the equipment of singing and is carried out the surface processing of singing, and promptly can be made into a kind of high-temperature resistant fiber layer composite filter material of the present invention.
It is in order to strengthen the typing effect of composite filter material that step uses PTFE emulsion after the dilution to soak to composite filter material in 8.; Wherein said PTFE emulsion is the existing product emulsion that contains the 60%PTFE composition; This emulsion dilute with water can be convenient to composite filter material absorption; PTFE emulsion and hydromining can make filtering material have the effect of finalizing the design preferably with 1: 7 volume ratio, but because emulsion concentration is higher, the soak time that therefore needs is longer; PTFE emulsion and hydromining can be convenient to filtering material with 1: 10 volume ratio and adsorb rapidly, but because emulsion concentration is lower, the effect of therefore finalizing the design is relatively poor, in the actual production, can be according to the needs of product with the volume ratio of PTFE emulsion and water 1: 7-1: adjust between 10.For example:
The volume ratio of PTFE emulsion and water is: 1: 7.
The volume ratio of PTFE emulsion and water is: 1: 8.
The volume ratio of PTFE emulsion and water is: 1: 9.
The volume ratio of PTFE emulsion and water is: 1: 10.
The volume ratio of PTFE emulsion and water can adopt 1 in the 10. said coating liquid of step: any ratio between the 3-5; The PTFE emulsion dilution of in this proportion, preparing have be convenient to apply, advantage that tack is strong; In actual production; Coating liquid can adopt any volume ratio in the above-mentioned scope according to actual conditions, for example:
The volume ratio of PTFE emulsion and water 1: 3.
The volume ratio of PTFE emulsion and water 1: 4.
The volume ratio of PTFE emulsion and water 1: 5.
The coat film that coating liquid forms on the composite filter material surface is behind bone dry; Thickness is 0.05-0.8mm; PTFE composition contained in the coat film can play a protective role to the composite filter material surface, helps strengthening the non-oxidizability and the corrosion resistance of composite filter material.
The acupuncture processing procedure of step described in 7. can adopt many needing machines to cooperate and accomplish; Wherein preferred scheme is: described needing machine is seven; Wherein the needing machine of composite filter upper surface acupuncture and needing machine to the acupuncture of composite filter lower surface are staggered, depth of needling is followed successively by from front to back: 15mm, 13mm, 11mm, 9mm, 7mm, 5mm and 3mm.The needling direction of seven needing machines is staggered, and can guarantee the smooth of surface after the composite filter acupuncture, and depth of needling reduces from front to back successively, is in order to guarantee to meet the smooth of surface after the filter course acupuncture equally.Certainly when producing the bigger particular filtered material of some thickness; Can suitably increase the quantity of needing machine; And the depth of needling of increase needing machine; Usually when producing the bigger filtering material of thickness, adopt 8 needing machines, the depth of needling of every needing machine is followed successively by 20mm, 18mm, 16mm, 14mm, 2mm, 10mm, 8mm and 6mm from front to back.

Claims (1)

1. high-temperature resistant fiber layer composite filter material; Its section is a three-decker; It is characterized in that: the upper and lower are mixed fiber layer (1); Between the upper and lower PTFE base cloth layer (2), the employed raw materials by weight meter of mixed fiber layer (1), PPS fiber 80% and PTFE fiber 20%; Its processing step is following:
1. it is subsequent use to get the PPS fiber according to 80% of mixed fiber layer (1) raw material gross weight, and it is subsequent use to get the PTFE fiber by 20% of mixed fiber layer (1) raw material gross weight;
2. the two kind raw materials of step in are 1. inserted in the blending box and mix, obtain thick batch mixing;
3. thick batch mixing is inserted opener and carry out the shredding processing;
4. the raw material after the 3. middle shredding of step is inserted blending box and mix, obtain meticulous compound;
5. meticulous compound is carded to the plane reticular fibre through carding machine;
6. use the lapping machine that the netted fiber lay down in plane is become mixed fiber layer (1), get two-layer mixed fiber layer (1), and between two-layer mixed fiber layer (1), add PTFE base cloth layer (2), constitute composite filter;
7. adopt needing machine that the upper and lower surface of composite filter is carried out the acupuncture processing, process composite filter material;
8. composite filter material is inserted in the PTFE emulsion after the dilution and soak, the volume ratio of PTFE emulsion and water is 1 in the PTFE emulsion after the dilution: 7-10;
9. the composite filter material after will soaking is inserted and is carried out high-temperature shaping in the modular system, and the setting temperature in the modular system is 220 ℃-280 ℃, the speed of travel of composite filter material in modular system be 4.5-5.5 rice/minute;
10. the composite filter material after will finalizing the design is inserted to scrape and is adopted coating liquid to carry out surface-coated in the automatic doubler surface glouer, forms the PTFE coat film on the composite filter material surface, and coating liquid is the PTFE emulsion after diluting, and wherein the volume ratio of PTFE emulsion and water is 1: 3-5;
Composite filter material after will apply is inserted the equipment of singing and is carried out the surface processing of singing, and promptly can be made into a kind of high-temperature resistant fiber layer composite filter material of the present invention;
The needing machine of step described in 7. is seven; Wherein the needing machine of composite filter upper surface acupuncture and needing machine to the acupuncture of composite filter lower surface are staggered, depth of needling is followed successively by from front to back: 15mm, 13mm, 11mm, 9mm, 7mm, 5mm and 3mm.
CN2010102147426A 2010-07-01 2010-07-01 High-temperature resistant fiber layer composite filter material and method for preparing same Active CN101862567B (en)

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Publication number Priority date Publication date Assignee Title
CN102151436B (en) * 2011-01-29 2013-04-10 东北大学 High temperature-resistant anti-oxidation filter material and manufacturing method thereof
CN102275373B (en) * 2011-04-26 2014-08-20 中材科技股份有限公司 Preparation method of PPs (polyphenylene sulfite) composite punched felt membrane filter material
CN102319528A (en) * 2011-06-17 2012-01-18 莱芜兴业滤材树脂有限公司 Phenolic fiber high-temperature filtration dust removing felt and production method thereof
CN103263806B (en) * 2012-12-11 2014-12-24 张延青 Novel filter material for removing ultrafine particles in high temperature flue gas and production technology thereof
CN103170185B (en) * 2013-03-29 2014-12-31 福建龙净环保股份有限公司 Filter material for coal-fired boilers and preparation method thereof
CN106215525A (en) * 2016-08-19 2016-12-14 安徽元琛环保科技股份有限公司 A kind of production method of PTFE coated filter material
CN106149206A (en) * 2016-08-19 2016-11-23 安徽元琛环保科技股份有限公司 A kind of preparation method of nanofiber acupuncture PTFE base fabric filter material
CN106377941B (en) * 2016-11-18 2018-11-30 盐城工学院 A kind of preparation method of antistatic filtering material
CN108159782B (en) * 2018-01-09 2020-08-14 安徽元琛环保科技股份有限公司 High-load multi-effect filter material and preparation method thereof
CN109289330B (en) * 2018-11-14 2021-05-04 北京建筑材料科学研究总院有限公司 Sheet material integrating filtering, dust removal and catalytic denitration and manufacturing method thereof
CN110130116A (en) * 2019-05-28 2019-08-16 江苏喜洋洋环保设备科技有限公司 The preparation process of alkaline-resisting PTFE fiber, PPS fiber blend Nomex

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CN101804272A (en) * 2010-04-20 2010-08-18 南京际华三五二一特种装备有限公司 Preparation method of specific composite filter material for coal-fired power plant electric bag integration project

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CN101804272A (en) * 2010-04-20 2010-08-18 南京际华三五二一特种装备有限公司 Preparation method of specific composite filter material for coal-fired power plant electric bag integration project

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Denomination of invention: High-temperature resistant fiber layer composite filter material and method for preparing same

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