CN103706184B - Polyimide fiber complex fire resistant filter felt and preparation method thereof - Google Patents
Polyimide fiber complex fire resistant filter felt and preparation method thereof Download PDFInfo
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- CN103706184B CN103706184B CN201310699965.XA CN201310699965A CN103706184B CN 103706184 B CN103706184 B CN 103706184B CN 201310699965 A CN201310699965 A CN 201310699965A CN 103706184 B CN103706184 B CN 103706184B
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- polyimide fiber
- fire resistant
- resistant filter
- filter felt
- complex fire
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- 239000000835 fiber Substances 0.000 title claims abstract description 60
- 239000004642 Polyimide Substances 0.000 title claims abstract description 47
- 229920001721 polyimide Polymers 0.000 title claims abstract description 47
- 230000009970 fire resistant effect Effects 0.000 title claims abstract description 24
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 17
- 239000004744 fabric Substances 0.000 claims abstract description 12
- 238000001467 acupuncture Methods 0.000 claims abstract description 4
- 239000000839 emulsion Substances 0.000 claims description 18
- 238000007598 dipping method Methods 0.000 claims description 17
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 9
- 238000005470 impregnation Methods 0.000 claims description 8
- 239000007822 coupling agent Substances 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 7
- 238000007493 shaping process Methods 0.000 claims description 7
- DCQBZYNUSLHVJC-UHFFFAOYSA-N 3-triethoxysilylpropane-1-thiol Chemical compound CCO[Si](OCC)(OCC)CCCS DCQBZYNUSLHVJC-UHFFFAOYSA-N 0.000 claims description 5
- 229920002545 silicone oil Polymers 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 239000000428 dust Substances 0.000 abstract description 13
- 238000001914 filtration Methods 0.000 abstract description 8
- 238000010438 heat treatment Methods 0.000 abstract description 6
- 230000014759 maintenance of location Effects 0.000 abstract description 6
- 239000002994 raw material Substances 0.000 description 9
- -1 chemistry Substances 0.000 description 6
- 239000004810 polytetrafluoroethylene Substances 0.000 description 5
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical group [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 4
- 229910000077 silane Inorganic materials 0.000 description 4
- 229920002994 synthetic fiber Polymers 0.000 description 4
- 239000012209 synthetic fiber Substances 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000003546 flue gas Substances 0.000 description 3
- 239000003365 glass fiber Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- PHQOGHDTIVQXHL-UHFFFAOYSA-N n'-(3-trimethoxysilylpropyl)ethane-1,2-diamine Chemical compound CO[Si](OC)(OC)CCCNCCN PHQOGHDTIVQXHL-UHFFFAOYSA-N 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000009960 carding Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000000706 filtrate Substances 0.000 description 2
- 238000009432 framing Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- UUEWCQRISZBELL-UHFFFAOYSA-N 3-trimethoxysilylpropane-1-thiol Chemical compound CO[Si](OC)(OC)CCCS UUEWCQRISZBELL-UHFFFAOYSA-N 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 229920000914 Metallic fiber Polymers 0.000 description 1
- 206010037660 Pyrexia Diseases 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000004996 alkyl benzenes Chemical class 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 210000003169 central nervous system Anatomy 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000012717 electrostatic precipitator Substances 0.000 description 1
- 210000000987 immune system Anatomy 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 210000002345 respiratory system Anatomy 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- YUYCVXFAYWRXLS-UHFFFAOYSA-N trimethoxysilane Chemical compound CO[SiH](OC)OC YUYCVXFAYWRXLS-UHFFFAOYSA-N 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Abstract
The invention discloses a kind of polyimide fiber complex fire resistant filter felt and preparation method thereof, the preparation method of described polyimide fiber complex fire resistant filter felt, comprise the steps: that (1), by warp thread basalt yarn and weft yarn polyimides yarn vertical interweaving mutually, make base cloth; (2) polyimide fiber is made to polyimide fiber layer through air-laid process or mechanical net-forming process; (3) lapping of base cloth above and below stacks polyimide fiber layer, preliminary pre-needling; (4) main acupuncture. Polyimide fiber complex fire resistant filter felt prepared by the present invention, after dust is peeled off rate and heating in 100 hours, strength retention is higher, is applicable to dust removal by filtration in 220-240 DEG C of high-temperature work environment.
Description
Technical field
The present invention relates to a kind of high temperature filtration felt and preparation method thereof, relate in particular to a kind of polyimide fiberComplex fire resistant filter felt and preparation method thereof.
Background technology
In China, " high flow rate, the maximum discharge, high dirty such as electric power, iron and steel, chemistry, cement, waste incinerationDye " industry develop rapidly, created to people more rich, easily and efficiently life in,Also the sustainable development of the natural resources to China, the energy, environment has caused serious threat. These societiesIn the atmosphere pollution of meeting industrial discharge, mainly comprise high-temperature flue gas, dust, SOX, NOX etc. AsFruit directly enters in atmosphere without improvement, can directly or indirectly have influence on people's respiratory system, the heartVascular system, central nervous system, immune system etc., and and then threaten the life security of human body.
The main target of industrial dedusting technology is to control the discharge of pollution sources flue gas particles, minimizing atmosphere pollution.At present for the processing of industrial high temperature flue gas, that mainly takes has wet dedusting, electric precipitation, a bag-type dustingThree kinds of methods, wherein sack cleaner is at efficiency of dust collection, disposable and long-term investment expense, equipment requirementAll be better than wet dedusting and electric precipitation with the aspect such as performance, after replacing gradually both and occupy main flow industryDeduster market. The core of sack cleaner is high temperature resistance filtration material, and the performance of high temperature resistance filtration material is good and bad by straightConnect efficient, reliable and stable, the long-play that are related to deduster.
Increasingly strict along with domestic and international environmental regulation, countries in the world to the exploitation of Filters and application moreMore pay attention to. Home and abroad dust arrester installation has inertial dust separator, cyclone dust collectors, wet scrubber, bagFormula filter, electrostatic precipitator etc. are multiple, except specific use, adopt bag filter (letter below moreClaim bag hose) and electrostatic filter, wherein bag hose accounts for 80% left and right. The critical component of bag hose wasFiltering material. Filtering material has cotton, hair, synthetic fibers, glass fibre, ceramic fibre, metallic fiber etc.Multiple, most widely used is glass fibre and synthetic fibers. Glass fibre because temperature tolerance is high, corrosion-resistant,Smooth surface, dust peeling property and good stability of the dimension, use existing half a century as filtering material.
At present, high-temperature filter material industry has to accept challenges, and notice is transferred to " upgrading " from " increment "Come up, specifically comprise promote filtrate strainability, reduce filtration resistance, improve corrosion-and high-temp-resistantCan, increase service life.
Summary of the invention
For above shortcomings in prior art, one of technical problem to be solved by this invention is to carryFor a kind of preparation method of polyimide fiber complex fire resistant filter felt. Technology to be solved by this inventionTwo of problem is to provide a kind of polyimide fiber complex fire resistant filter felt.
Technical problem to be solved by this invention is achieved by the following technical solution:
A preparation method for polyimide fiber complex fire resistant filter felt, comprises the steps:
(1) by warp thread basalt yarn and weft yarn polyimides yarn vertical interweaving mutually, make base cloth;
(2) polyimide fiber is made to polyimide fiber through air-laid process or mechanical net-forming processLayer;
(3) lapping of base cloth above and below stacks above-mentioned polyimide fiber layer, preliminary pre-needling;
(4) main acupuncture, makes described polyimide fiber complex fire resistant filter felt.
Further, can also comprise:
(5) impregnation process:
(6) preliminary drying, oven dry and high-temperature shaping.
The impregnation process of step (5) is specially:
The described polyimide fiber complex fire resistant filter felt that step (4) is made, in dipping emulsionDipping;
Technological parameter: dipping temperature 70-90 DEG C, dip time 5-20 minute, controls liquid carrying rate and (rollRemaining rate) 50-150%;
Described dipping emulsion, is made up of following materials by weight percentage: 10-14% ptfe emulsion,1-3% silicone oil, 0.2-0.6% coupling agent, surplus are water. Under normal temperature and pressure, each raw material is uniformly mixed,Can make described dipping emulsion.
In described ptfe emulsion, polytetrafluoroethylene content is 55-65wt%. Ptfe emulsion,Can select the ptfe emulsion of the trade mark TE3859 of du pont company. TE3859 polytetrafluoroethylene (PTFE)Emulsion is milky white liquid, is the dispersion under nonionic surface active agent exists after tetrafluoroethylene polymerizationConcentrate, polytetrafluoroethylene (PTFE) solids content 60wt%. Through disperseing concentrate goods after treatment, there is ZhuoChemical stability more and remarkable resistance to chemical attack ability, as resistance to strong acid, highly basic, strong oxidizer etc.,Have outstanding heat-resisting, cold-resistant and wear resistance, long-term serviceability temperature scope is-200～250 DEG C. Also have excellentElectrical insulating property, and be not subject to the impact of temperature and frequency.
Described silicone oil can be: chain alkyl end-blocking silicone oil DK-285, long-chain alkyl benzene SE2203 silicone oilOr Dow Corning CorporationPMX-200 silicone oil.
Described coupling agent is silane coupler. Preferably, described coupling agent is N-β-(aminoethyl)-γ ammonia thirdBase trimethoxy silane and/or 3-mercaptopropyltriethoxysilane. Optimally, described coupling agent is by 10-30Weight portion N-β-(aminoethyl)-γ aminopropyl trimethoxysilane and 10-30 weight portion 3-mercapto propyl group three ethoxiesBase silane composition.
N-β-(aminoethyl)-γ aminopropyl trimethoxysilane, CAS:1760-24-3. Another name: silane is evenConnection agent KH-900, the external corresponding trade mark: A-1122 (GE); Z-6020 (DOW CORNING); KBM-603 (dayThis SHIN-ETSU HANTOTAI).
3-mercaptopropyltriethoxysilane, CAS:14814-09-6. Another name: silane coupler 580, stateThe outer corresponding trade mark: A-1891 (GE/OSi company of the U.S.) and KBM-803 (Japanese SHIN-ETSU HANTOTAI chemical industry strain formulaCommercial firm).
In step (6), described preliminary drying temperature is 100-120 DEG C; Bake out temperature is 130-150 DEG C; HighTemperature setting temperature is 210-250 DEG C.
In step (6), described preliminary drying, oven dry and high-temperature shaping complete by framing shaping machine.
Air-laid process described in step (2), is state of the art, is specifically as follows:
1. fiber is opened bag; 2. fiber opening-employing air flow delivery fiber, to form, fiber is mixed and disorderly to be arrangedEvenly fibre web; 3. fiber mixes; 4. fibre impurity-removing; 5. fiber feeds the cylinder of high speed rotary after mixing;6. fibre shedding; 7. air-flow conveying fiber is condensed into fleece; 8. output fiber net-evenly carried by air-flowCondense upon on lace curtaining, form distributed in three dimensions, in length and breadth to the little fleece of powerful difference.
Mechanical net-forming process described in step (2), is state of the art, is specifically as follows:
1. shredding: by opener, polyimide fiber is carried out to shredding, make it reach fluffy state;
2. combing: send into carding machine and be carded to fibre web;
3. lapping: use lapping machine to carry out lapping.
In the present invention, described polyimide fiber, claims again P84 fiber, is a kind of resistant to elevated temperatures non-Thermoplastic synthetic fibers. It is a kind of fiber of three leaf lobe shapes, because its ultimate fibre has increased surface area,A kind of medium that can effectively trap particle is provided, and therefore P84 the most effectively filters one of synthetic fibers.This fiber can be exposed in the environment for use of 240 DEG C continuously.
The present invention also provides a kind of polyimide fiber complex fire resistant filter felt, adopts said method systemStandby forming.
The polyimide fiber complex fire resistant filter felt that adopts the present invention to prepare, dust is peeled off rate and 100Hour heating after strength retention higher, be applicable to dust removal by filtration in 220-240 DEG C of high-temperature work environment. MainWant application scenario to be: metallurgy, city garbage incinerator, lime smelting furnace, industrial waste incinerator and fire coalBoiler etc.
Detailed description of the invention
Embodiment 1
The preparation method of polyimide fiber complex fire resistant filter felt, comprises the steps:
(1) by warp thread basalt yarn with weft yarn polyimides yarn in air-jet loom vertical interweaving mutually,Make base cloth; Control warp count: weft count=1:1, base cloth grammes per square metre 400g/m2。
(2) by polyimide fiber through mechanical net-forming process, make polyimide fiber layer;
1. shredding: by opener, polyimide fiber is carried out to shredding, make it reach fluffy state; 2.Combing: send into carding machine and be carded to fibre web; 3. lapping: use lapping machine to carry out lapping.
(3) lapping of base cloth above and below stacks above-mentioned polyimide fiber layer, preliminary pre-needling;
(4) main acupuncture, makes described polyimide fiber complex fire resistant filter felt.
The polyimide fiber complex fire resistant filter felt finally making, is three layers of layer structure, ground floorFor polyimide fiber layer; The second layer is base cloth, and described base cloth is by warp thread basalt yarn and weft yarn polyamidesImines yarns interwoven forms; The 3rd layer is polyimide fiber layer.
Table 1: polyimide fiber complex fire resistant filter felt material grammes per square metre table
| Grammes per square metre | |
| Polyimide fiber layer (ground floor) | 180g/m2 |
| Base cloth (second layer) | 400g/m2 |
| Polyimide fiber layer (the 3rd layer) | 180g/m2 |
Embodiment 2
On the polyimide fiber complex fire resistant filter felt basis of preparing at embodiment 1, further,Increase following step:
(5) impregnation process:
By table 2, corresponding embodiment 2 takes each raw material, under normal temperature and pressure, each raw material is uniformly mixed,Can make described dipping emulsion.
The described polyimide fiber complex fire resistant filter felt that step (4) is made, at above-mentioned dipping breastIn liquid, carry out impregnation process, technological parameter: 80 DEG C of dipping temperatures, dip time 10 minutes, controls bandLiquid rate (being pick-up) 100%.
(6) preliminary drying, oven dry and high-temperature shaping in framing shaping machine, controlling preliminary drying temperature is 110 DEG C;Bake out temperature is 140 DEG C; High-temperature shaping temperature is 230 DEG C.
Table 2 dipping emulsion formula table unit: kilogram
Embodiment 3
Embodiment 3 is substantially the same manner as Example 2, and unique difference is: dipping emulsion formula is different.
By table 2, corresponding embodiment 3 takes each raw material, under normal temperature and pressure, each raw material is uniformly mixed,Can make dipping emulsion.
Embodiment 4
Embodiment 4 is substantially the same manner as Example 2, and unique difference is: dipping emulsion formula is different.
By table 2, corresponding embodiment 4 takes each raw material, under normal temperature and pressure, each raw material is uniformly mixed,Can make dipping emulsion.
Embodiment 5
Embodiment 5 is substantially the same manner as Example 2, and unique difference is: dipping emulsion formula is different.
By table 2, corresponding embodiment 5 takes each raw material, under normal temperature and pressure, each raw material is uniformly mixed,Can make dipping emulsion.
Test case
According to HJ/T324-2006 environmental protection product technical requirement sack cleaner filtrate, carry out powderAfter dirt is peeled off rate and heating in 100 hours, strength retention is tested, and concrete data see the following form.
Table 3: test data table
| Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | |
| Dust is peeled off rate, % | 85 | 83 | 81 | 70 |
| Strength retention after heating in 100 hours, % | 93 | 90 | 89 | 86 |
Embodiment 2-4 compares with embodiment 5, increases impregnation process, and dust is peeled off rate and 100 hoursAfter heating, strength retention is all greatly improved.
Especially, embodiment 2 compares with embodiment 3-4, coupling agent in the dipping emulsion of impregnation processN-β-(aminoethyl)-γ aminopropyl trimethoxysilane and the composite use of 3-mercaptopropyltriethoxysilane, associationSame synergy, after dust is peeled off rate and heating in 100 hours, strength retention is all greatly improved.
Claims (3)
1. a preparation method for polyimide fiber complex fire resistant filter felt, comprises the steps:
(1) by warp thread basalt yarn and weft yarn polyimides yarn vertical interweaving mutually, make base cloth;
(2) polyimide fiber is made to polyimide fiber through air-laid process or mechanical net-forming processLayer;
(3) lapping of base cloth above and below stacks above-mentioned polyimide fiber layer, preliminary pre-needling;
(4) main acupuncture, makes described polyimide fiber complex fire resistant filter felt;
(5) impregnation process;
(6) preliminary drying, oven dry and high-temperature shaping;
The impregnation process of described step (5) is:
The described polyimide fiber complex fire resistant filter felt that step (4) is made, in dipping emulsionDipping;
Described dipping emulsion, is made up of following materials by weight percentage: 10-14% ptfe emulsion,1-3% silicone oil, 0.2-0.6% coupling agent, surplus are water;
Described coupling agent by 10-30 weight portion N-β-(aminoethyl)-γ aminopropyl trimethoxysilane and10-30 weight portion 3-mercaptopropyltriethoxysilane composition.
2. the preparation method of polyimide fiber complex fire resistant filter felt as claimed in claim 1, itsBe characterised in that:
In step (6), described preliminary drying temperature is 100-120 DEG C, and bake out temperature is 130-150 DEG C, heightTemperature setting temperature is 210-250 DEG C.
3. a polyimide fiber complex fire resistant filter felt, adopts any one institute in claim 1-2The method of stating is prepared from.
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| CN201310699965.XA CN103706184B (en) | 2013-12-18 | 2013-12-18 | Polyimide fiber complex fire resistant filter felt and preparation method thereof |
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| CN103706184B true CN103706184B (en) | 2016-05-11 |
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Families Citing this family (8)
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| US10828587B2 (en) * | 2015-04-17 | 2020-11-10 | Hollingsworth & Vose Company | Stable filter media including nanofibers |
| CN105344159B (en) * | 2015-07-13 | 2017-11-03 | 浙江宇邦滤材科技有限公司 | A kind of preparation method of the composite filter material of thermostable |
| CN107604532B (en) * | 2017-08-24 | 2020-05-22 | 中国恩菲工程技术有限公司 | Surface layer material of filter bag, flue gas treatment system and treatment method |
| CN108499221A (en) * | 2018-05-19 | 2018-09-07 | 上海博格工业用布有限公司 | Metallic fiber base special high temperature-resistant flue gas ash removal filter felt and preparation method thereof |
| CN110280046B (en) * | 2019-07-01 | 2021-08-06 | 江苏先诺新材料科技有限公司 | Insulating high temperature resistant fire-retardant polyimide oil is cotton |
| CN113813698A (en) * | 2021-09-24 | 2021-12-21 | 南京玻璃纤维研究设计院有限公司 | Filter material |
| CN115121045A (en) * | 2022-05-13 | 2022-09-30 | 广钢气体(广州)有限公司 | Flue gas filtering material and preparation method and application thereof |
| CN115652574A (en) * | 2022-10-11 | 2023-01-31 | 中国人民解放军93114部队 | Method for improving filling power of wadding material, wadding material and flying suit |
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