CN104629084B - A kind of cleaning method of waste and old polytetrafluoroethylene (PTFE) filter bag - Google Patents
A kind of cleaning method of waste and old polytetrafluoroethylene (PTFE) filter bag Download PDFInfo
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- CN104629084B CN104629084B CN201510066611.0A CN201510066611A CN104629084B CN 104629084 B CN104629084 B CN 104629084B CN 201510066611 A CN201510066611 A CN 201510066611A CN 104629084 B CN104629084 B CN 104629084B
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- acid
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- polytetrafluoroethylene
- ptfe
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- 229920001343 polytetrafluoroethylene Polymers 0.000 title claims abstract description 93
- 239000004810 polytetrafluoroethylene Substances 0.000 title claims abstract description 93
- -1 polytetrafluoroethylene Polymers 0.000 title claims abstract description 51
- 239000002699 waste material Substances 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000004140 cleaning Methods 0.000 title claims abstract description 15
- 150000007524 organic acids Chemical class 0.000 claims abstract description 34
- 239000004094 surface-active agent Substances 0.000 claims abstract description 32
- 239000007800 oxidant agent Substances 0.000 claims abstract description 31
- 239000000243 solution Substances 0.000 claims description 57
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 11
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 8
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 7
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 6
- 239000007864 aqueous solution Substances 0.000 claims description 6
- 235000005985 organic acids Nutrition 0.000 claims description 6
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 claims description 5
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 5
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 4
- 239000006229 carbon black Substances 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 230000001590 oxidative effect Effects 0.000 claims description 4
- VLTRZXGMWDSKGL-UHFFFAOYSA-N perchloric acid Chemical compound OCl(=O)(=O)=O VLTRZXGMWDSKGL-UHFFFAOYSA-N 0.000 claims description 4
- UUSIDVRFHRJWNK-UHFFFAOYSA-M C(CCCCCCC)(=O)[O-].[Na+].[F] Chemical class C(CCCCCCC)(=O)[O-].[Na+].[F] UUSIDVRFHRJWNK-UHFFFAOYSA-M 0.000 claims description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 3
- IAFACTRFHSQIMM-UHFFFAOYSA-N [NH4+].C(CCCCCCC)(=O)[O-].[F] Chemical class [NH4+].C(CCCCCCC)(=O)[O-].[F] IAFACTRFHSQIMM-UHFFFAOYSA-N 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- KMUONIBRACKNSN-UHFFFAOYSA-N potassium dichromate Chemical compound [K+].[K+].[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O KMUONIBRACKNSN-UHFFFAOYSA-N 0.000 claims description 3
- 239000012286 potassium permanganate Substances 0.000 claims description 3
- BJEPYKJPYRNKOW-REOHCLBHSA-N (S)-malic acid Chemical compound OC(=O)[C@@H](O)CC(O)=O BJEPYKJPYRNKOW-REOHCLBHSA-N 0.000 claims description 2
- VILCJCGEZXAXTO-UHFFFAOYSA-N 2,2,2-tetramine Chemical compound NCCNCCNCCN VILCJCGEZXAXTO-UHFFFAOYSA-N 0.000 claims description 2
- RNMCCPMYXUKHAZ-UHFFFAOYSA-N 2-[3,3-diamino-1,2,2-tris(carboxymethyl)cyclohexyl]acetic acid Chemical compound NC1(N)CCCC(CC(O)=O)(CC(O)=O)C1(CC(O)=O)CC(O)=O RNMCCPMYXUKHAZ-UHFFFAOYSA-N 0.000 claims description 2
- KWYJDIUEHHCHCZ-UHFFFAOYSA-N 3-[2-[bis(2-carboxyethyl)amino]ethyl-(2-carboxyethyl)amino]propanoic acid Chemical compound OC(=O)CCN(CCC(O)=O)CCN(CCC(O)=O)CCC(O)=O KWYJDIUEHHCHCZ-UHFFFAOYSA-N 0.000 claims description 2
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 claims description 2
- 239000003109 Disodium ethylene diamine tetraacetate Substances 0.000 claims description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 2
- 239000005708 Sodium hypochlorite Substances 0.000 claims description 2
- KDYFGRWQOYBRFD-UHFFFAOYSA-N Succinic acid Natural products OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 claims description 2
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 claims description 2
- BJEPYKJPYRNKOW-UHFFFAOYSA-N alpha-hydroxysuccinic acid Natural products OC(=O)C(O)CC(O)=O BJEPYKJPYRNKOW-UHFFFAOYSA-N 0.000 claims description 2
- KDYFGRWQOYBRFD-NUQCWPJISA-N butanedioic acid Chemical compound O[14C](=O)CC[14C](O)=O KDYFGRWQOYBRFD-NUQCWPJISA-N 0.000 claims description 2
- 235000015165 citric acid Nutrition 0.000 claims description 2
- 235000019301 disodium ethylene diamine tetraacetate Nutrition 0.000 claims description 2
- 239000001630 malic acid Substances 0.000 claims description 2
- 235000011090 malic acid Nutrition 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 229910021645 metal ion Inorganic materials 0.000 claims description 2
- 229910017604 nitric acid Inorganic materials 0.000 claims description 2
- 235000006408 oxalic acid Nutrition 0.000 claims description 2
- PNYYBUOBTVHFDN-UHFFFAOYSA-N sodium bismuthate Chemical compound [Na+].[O-][Bi](=O)=O PNYYBUOBTVHFDN-UHFFFAOYSA-N 0.000 claims description 2
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 claims description 2
- 235000002906 tartaric acid Nutrition 0.000 claims description 2
- 239000011975 tartaric acid Substances 0.000 claims description 2
- 229960001124 trientine Drugs 0.000 claims description 2
- LZDKZFUFMNSQCJ-UHFFFAOYSA-N 1,2-diethoxyethane Chemical compound CCOCCOCC LZDKZFUFMNSQCJ-UHFFFAOYSA-N 0.000 claims 1
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 claims 1
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 claims 1
- 229960004424 carbon dioxide Drugs 0.000 claims 1
- 229910002090 carbon oxide Inorganic materials 0.000 claims 1
- 229910052731 fluorine Inorganic materials 0.000 claims 1
- 239000011737 fluorine Substances 0.000 claims 1
- 229910052740 iodine Inorganic materials 0.000 claims 1
- 239000011630 iodine Substances 0.000 claims 1
- 230000003647 oxidation Effects 0.000 claims 1
- 238000007254 oxidation reaction Methods 0.000 claims 1
- RLEFZEWKMQQZOA-UHFFFAOYSA-M potassium;octanoate Chemical compound [K+].CCCCCCCC([O-])=O RLEFZEWKMQQZOA-UHFFFAOYSA-M 0.000 claims 1
- 238000007654 immersion Methods 0.000 abstract description 7
- 238000005245 sintering Methods 0.000 abstract description 5
- 239000003960 organic solvent Substances 0.000 abstract description 3
- 238000004064 recycling Methods 0.000 abstract description 2
- 238000002525 ultrasonication Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 5
- 239000004568 cement Substances 0.000 description 4
- 239000010419 fine particle Substances 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- VQTUBCCKSQIDNK-UHFFFAOYSA-N Isobutene Chemical compound CC(C)=C VQTUBCCKSQIDNK-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000010813 municipal solid waste Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000001172 regenerating effect Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical compound FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 2
- 238000004056 waste incineration Methods 0.000 description 2
- 244000025254 Cannabis sativa Species 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- QXNVGIXVLWOKEQ-UHFFFAOYSA-N Disodium Chemical compound [Na][Na] QXNVGIXVLWOKEQ-UHFFFAOYSA-N 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 239000004734 Polyphenylene sulfide Substances 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- UVHHJQRNDQZYLE-UHFFFAOYSA-N acetic acid 1,2-diethoxyethane ethane-1,2-diamine Chemical compound C(C)(=O)O.C(C)(=O)O.C(C)(=O)O.C(C)(=O)O.C(CN)N.C(C)OCCOCC UVHHJQRNDQZYLE-UHFFFAOYSA-N 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229960004543 anhydrous citric acid Drugs 0.000 description 1
- 229920006231 aramid fiber Polymers 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- IYRWEQXVUNLMAY-UHFFFAOYSA-N carbonyl fluoride Chemical compound FC(F)=O IYRWEQXVUNLMAY-UHFFFAOYSA-N 0.000 description 1
- 210000000748 cardiovascular system Anatomy 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229960004106 citric acid Drugs 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000007398 colorimetric assay Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- HCDGVLDPFQMKDK-UHFFFAOYSA-N hexafluoropropylene Chemical compound FC(F)=C(F)C(F)(F)F HCDGVLDPFQMKDK-UHFFFAOYSA-N 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 239000011133 lead Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 210000000653 nervous system Anatomy 0.000 description 1
- NICDRCVJGXLKSF-UHFFFAOYSA-N nitric acid;trihydrochloride Chemical compound Cl.Cl.Cl.O[N+]([O-])=O NICDRCVJGXLKSF-UHFFFAOYSA-N 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- KHIWWQKSHDUIBK-UHFFFAOYSA-N periodic acid Chemical compound OI(=O)(=O)=O KHIWWQKSHDUIBK-UHFFFAOYSA-N 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 229920000069 polyphenylene sulfide Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 210000004994 reproductive system Anatomy 0.000 description 1
- 210000002345 respiratory system Anatomy 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
Landscapes
- Filtering Materials (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
The invention discloses a kind of cleaning method of waste and old polytetrafluoroethylene (PTFE) filter bag.This method is then waste and old polytetrafluoroethylene (PTFE) filter bag is rinsed and dried, obtain pure waste and old polytetrafluoroethylene (PTFE) filter bag successively using surfactant solution, oxidizing agent solution and organic acid soln cleaning and immersion.The present invention is not required to organic solvent and ultrasonication；Method is simple, and cost is relatively low to be subject to recycling by follow-up sintering and disintegrating process.
Description
Technical field
The present invention relates to the cleaning method of waste and scrap, and in particular to a kind of cleaning side of waste and old polytetrafluoroethylene (PTFE) filter bag
Method.
Background technology
Currently, it is total to account for whole nation discharge for the smoke discharge amount of the enterprise such as coal-burning power plant, garbage burning factory, cement, steel production
More than the 70% of amount, it is the primary pollution source of air.In air, below PM2.5 particle can enter human body alveolar, to human body
Respiratory system, cardiovascular system, nervous system and reproductive system etc. cause to endanger extensively.Therefore, in atmosphere pollution improvement,
The removal and control discharge of fine particle are one of emphasis currently paid close attention to.Bag type dust removing technology can trap fine dusts, have
Effect removes the dust pollution thing in flue gas, therefore it is in coal-fired plant boiler dedusting, large-scale cement kiln hood and kiln tail dedusting, rubbish
The fields such as incineration tail gas purification, flue gas in power station boiler dedusting, dedusting of blast furnace gas have a wide range of applications.
Ensure the efficient retention of PM2.5 fine particles, filter bag is the key of sack cleaner.The primary raw material of filter bag
There are the materials such as polytetrafluoroethylene (PTFE), polyimides, polyphenylene sulfide and aramid fiber.Polytetrafluoroethylene (PTFE) is commonly called as " King ", has excellent
Different chemical resistance (resistance to strong acid, highly basic, grease, ketone, ether etc. corrode, resistance to chloroazotic acid corrosion), heat endurance (normal use temperature
For -250~260 DEG C), resistance to ag(e)ing, do not absorb water, be not hydrolyzed, the performance such as good flame resistance；Using polytetrafluoroethylene (PTFE) removing as raw material
Dirt filter bag is particularly suitable for use in high temperature and operating mode complicated gas cleaning processing (such as waste incineration, coal-burning power plant, steel, cement life
The fields such as production).The service life of polytetrafluoroethylfilter filter material is 3-4, there are about 5000 tons of waste and old polytetrafluoroethylene (PTFE) filter bag every year
Need to be recycled.The processing method of current waste and old polytetrafluoroethylene (PTFE) filter bag mainly has two kinds：(1) depth fills；(2) heat is burned
Can recovery.Polytetrafluoroethylene (PTFE) is extremely stable, and decades are all non-degradable in the environment, and filling waste and old polytetrafluoroethylene (PTFE) filter bag can be to life
State environment brings serious pollution, and this method is to handle the very unwise move method of waste and old polytetrafluoroethylene (PTFE) filter bag.In addition, polytetrafluoroethylene (PTFE)
It can be burned in incinerator, reclaim its heat energy distributed.But tetrafluoroethene, hexafluoropropene, octafluoro can be produced in burning process
The fine particle of the extremely toxic substances such as isobutene, fluorophosgene and below PM2.5, pollute air.Therefore recycle waste and old poly-
Tetrafluoroethene filter bag has important environment protection significance.
The polytetrafluoroethylene (PTFE) filter bag normal phase uses under the conditions of the complicated industrial and mineral of the high temperature such as fire coal, cement sintering, waste incineration,
Surface deposited a large amount of pale brown color substances (as shown in Figure 1), main component for oxides of metal such as iron, copper, aluminium, zinc, lead and
The materials such as carbon black caused by imperfect combustion.Therefore, polytetrafluoroethylene (PTFE) filter bag must clean it completely before recycling
Totally.Patent 201410079632 discloses a kind of recovery method of polytetrafluoroethylcellular cellular material, and it uses chopped fiber to cut
Polyfluortetraethylewastes wastes are cut into fine particle by machine, are carried out successively in the ultrasonic cleaner containing organic solvent and water clear
Wash and dry, then polytetrafluoroethylgranule granule high temperature sintering, low temperature is sudden cold, then smashed with ball mill, obtain polytetrafluoroethylene (PTFE)
Reclaim powder.Patent 200810132358.4 discloses a kind of recovery method of polytetrafluoroethylene (PTFE), and it is by filled polytetrafluoroethylene
After waste material is cleaned by ultrasonic and dried, by crushing and screening to obtain polytetrafluoroethylene (PTFE) powder.Patent 200710067131.1 is public
A kind of preparation method of polytetrafluoroethylregenerative regenerative powder is opened, polyfluortetraethylewastes wastes are cleaned, be milled, sieved, burnt by it
The steps such as knot, granulation, obtain polytetrafluoroethylregenerative regenerative powder.Although existing patent discloses crushing, sintering and product processing etc.
Technique, but the cleaning process of waste and old polytetrafluoroethylmaterial material is not disclosed.
The content of the invention
It is an object of the invention to provide a kind of cleaning method of waste and old polytetrafluoroethylene (PTFE) filter bag, this method is first will be waste and old
Polytetrafluoroethylene (PTFE) filter bag is cut into band, and band is used into surfactant solution, oxidizing agent solution and organic acid soln successively
Cleaning and immersion, obtain pure waste and old polytetrafluoroethylene (PTFE) filter bag.
The step of the technical solution adopted by the present invention, is as follows：
A) cut：Waste and old polytetrafluoroethylene (PTFE) filter bag is cut into length as 10~100 centimetres with scissors, width is 1~5 li
The band of rice；
B) surfactant solution washs：By surfactant, sodium carbonate and water in mass ratio 1~20:1~5:100 is mixed
Close uniformly, be configured to surfactant solution, band is immersed in surfactant solution, band and surfactant solution
Mass ratio be 1~50:100, washed 1~5 hour at being 20~60 DEG C in temperature；
C) oxidizing agent solution soaks：By oxidant and water in mass ratio 1:0.01~10 is configured to oxidizing agent solution, by bar
Band is immersed in aqueous oxidizing agent solution, and the mass ratio of band and oxidizing agent solution is 1~50:100, in the case where temperature is 20~80 DEG C
Immersion 1~20 day；
D) organic acid soln soaks：By organic acid and water in mass ratio 10~30:100 are configured to organic acid soln, by bar
Band is immersed in aqueous solutions of organic acids, and the mass ratio of band and organic acid soln is 1~50:100, in the case where temperature is 20~80 DEG C
Immersion 1~48 hour, rinses and dries, obtain pure waste and old polytetrafluoroethylene (PTFE) filter bag band.
Surfactant is nine fluorine butane potassium sulfonates, 15 fluorine ammonium caprylates, 15 fluorine Sodium Caprylates or ten in the b) step
Five fluorine potassium octanoates.
In the c) step oxidant be potassium permanganate, potassium bichromate, sulfuric acid, sodium hypochlorite, hydrogen peroxide, perchloric acid,
Nitric acid, sodium bismuthate, periodic acid or Na2Fe04.
Organic acid is disodium ethylene diamine tetraacetate, ethylenediamine tetrapropionic acid, cyclohexanediamine tetraacetic acid, grass in the d) step
Acid, ethylene glycol diethyl ether ethylenediamine tetraacetic acid (EDTA), the acetic acid of trientine six, succinic acid, tartaric acid, citric acid or malic acid.
Compared with background technology, the invention has the advantages that：
(1) waste and old polytetrafluoroethylene (PTFE) filter bag surface deposits main component is caused by metal oxide and imperfect combustion
The particulate matters such as carbon black, this law first remove a part of particle thing using surfactant solution, then using oxidizing agent solution by carbon black
The characteristics of being oxidized to carbon dioxide, then easily forming complex using organic acid and metal ion is dissolved golden using organic acid soln
Belong to oxide, obtain pure waste and old polytetrafluoroethylene (PTFE) filter bag.
(2) compared with patent 201410079632, the application patent is not required to organic solvent and ultrasonication；With patent
200810132358.4 comparing, the application patent is not required to ultrasonic wave cleaning；Compared with patent 200710067131.1, the application is public
Cleaning program is opened.
(3) method is simple by the present invention, and cost is relatively low, can be reclaimed by follow-up sintering and disintegrating process
Recycle.
Brief description of the drawings
Fig. 1 is waste and old polytetrafluoroethylene (PTFE) filter bag.
Fig. 2 is the waste and old polytetrafluoroethylene (PTFE) filter bag after being cleaned by embodiment 2.
Embodiment
Embodiment 1：
A) cut：Waste and old polytetrafluoroethylene (PTFE) filter bag is cut into length as 10 centimetres with scissors, width is 1 centimetre of bar
Band；
B) surfactant solution washs：By nine fluorine butane potassium sulfonates, natrium carbonicum calcinatum and water in mass ratio 1:1:100 is mixed
Close uniformly, be configured to surfactant solution, band is immersed in surfactant solution, band and surfactant solution
Mass ratio be 1:100, washed 1 hour at being 60 DEG C in temperature；
C) oxidizing agent solution soaks：By potassium permanganate and water in mass ratio 1:10 are configured to oxidizing agent solution, and band is soaked
For bubble in aqueous oxidizing agent solution, the mass ratio of band and oxidizing agent solution is 1:100, soaked 20 days at being 20 DEG C in temperature；
D) organic acid soln soaks：By anhydrous ethylenediamine tetraacethyl disodium and water in mass ratio 10:100 are configured to organic acid
Solution, band is immersed in aqueous solutions of organic acids, the mass ratio of band and organic acid soln is 1:100, it is 20 DEG C in temperature
Lower immersion 48 hours, rinses and dries, pure waste and old polytetrafluoroethylene (PTFE) filter bag band is obtained, labeled as A.
Embodiment 2：
A) cut：Waste and old polytetrafluoroethylene (PTFE) filter bag is cut into length as 100 centimetres with scissors, width is 5 centimetres of bar
Band；
B) surfactant solution washs：By 15 fluorine ammonium caprylates, sodium carbonate and water in mass ratio 20:5:100 mixing are equal
It is even, surfactant solution is configured to, band is immersed in surfactant solution, the matter of band and surfactant solution
Amount is than being 50:100, washed 5 hours at being 20 DEG C in temperature；
C) oxidizing agent solution soaks：By the sulfuric acid solution and water in mass ratio 1 that mass fraction is 98%:0.01 is configured to oxygen
Agent solution, band is immersed in aqueous oxidizing agent solution, and the mass ratio of band and oxidizing agent solution is 50:100, be in temperature
Soaked 1 day at 80 DEG C；
D) organic acid soln soaks：By oxalic acid (H2C2O4·2H2) and water in mass ratio 30 O:100 to be configured to organic acid molten
Liquid, band is immersed in aqueous solutions of organic acids, the mass ratio of band and organic acid soln is 50:100, in the case where temperature is 80 DEG C
Immersion 1 hour, rinses and dries, obtain pure waste and old polytetrafluoroethylene (PTFE) filter bag band, as shown in Fig. 2 being labeled as B.
Embodiment 3：
A) cut：Waste and old polytetrafluoroethylene (PTFE) filter bag is cut into length as 30 centimetres with scissors, width is 2 centimetres of bar
Band；
B) surfactant solution washs：By 15 fluorine Sodium Caprylates, sodium carbonate and water in mass ratio 5:2:100 mixing are equal
It is even, surfactant solution is configured to, band is immersed in surfactant solution, the matter of band and surfactant solution
Amount is than being 20:100, washed 4 hours at being 40 DEG C in temperature；
C) oxidizing agent solution soaks：By liquor natrii hypochloritis of the mass fraction for 10% and water in mass ratio 1:8 are configured to
Oxidizing agent solution, band is immersed in aqueous oxidizing agent solution, the mass ratio of band and oxidizing agent solution is 40:100, in temperature
To soak 12 days at 40 DEG C；
D) organic acid soln soaks：By anhydrous acid and water in mass ratio 15:100 are configured to organic acid soln, by bar
Band is immersed in aqueous solutions of organic acids, and the mass ratio of band and organic acid soln is 12:100, soak 40 at being 45 DEG C in temperature
Hour, rinse and dry, pure waste and old polytetrafluoroethylene (PTFE) filter bag band is obtained, labeled as C.
Embodiment 4：
A) cut：Waste and old polytetrafluoroethylene (PTFE) filter bag is cut into length as 80 centimetres with scissors, width is 3 centimetres of bar
Band；
B) surfactant solution washs：By 15 fluorine potassium octanoates, sodium carbonate and water in mass ratio 15:4:100 mixing are equal
It is even, surfactant solution is configured to, band is immersed in surfactant solution, the matter of band and surfactant solution
Amount is than being 35:100, washed 2 hours at being 50 DEG C in temperature；
C) oxidizing agent solution soaks：By potassium bichromate and water in mass ratio 1:5 are configured to oxidizing agent solution, and band is soaked
In aqueous oxidizing agent solution, the mass ratio of band and oxidizing agent solution is 25:100, soaked 5 days at being 65 DEG C in temperature；
D) organic acid soln soaks：By anhydrous citric acid and water in mass ratio 20:100 are configured to organic acid soln, by bar
Band is immersed in aqueous solutions of organic acids, and the mass ratio of band and organic acid soln is 40:100, immersion 5 is small at being 70 DEG C in temperature
When, rinse and dry, pure waste and old polytetrafluoroethylene (PTFE) filter bag band is obtained, labeled as D.
The waste and old polytetrafluoroethylene (PTFE) filter bag cleaned in unwashed waste and old polytetrafluoroethylene (PTFE) filter bag and above-mentioned 4 embodiments
Band tests its whiteness according to GB/T 17644-1998 textile fabric whiteness colorimetric assay methods, is listed in the table below 1, each embodiment
Show higher whiteness value.
The front and rear whiteness value of the polytetrafluoroethylene (PTFE) filter bag of table 1 cleaning
| Embodiment | Whiteness value |
| A | 85.38% |
| B | 87.60% |
| C | 80.27% |
| D | 85.25% |
| Unwashed waste and old polytetrafluoroethylene (PTFE) filter bag | 25.60% |
Claims (3)
1. a kind of cleaning method of waste and old polytetrafluoroethylene (PTFE) filter bag, comprises the following steps：
a）Cut：Waste and old polytetrafluoroethylene (PTFE) filter bag is cut into length as 10~100 centimetres with scissors, width is 1~5 centimetre
Band；
b）Surfactant solution washs：By surfactant, sodium carbonate and water in mass ratio 1~20:1~5:100 mixing are equal
It is even, surfactant solution is configured to, band is immersed in surfactant solution, the matter of band and surfactant solution
Amount is than being 1~50:100, washed 1~5 hour at being 20~60 DEG C in temperature；
c）Oxidizing agent solution soaks：By oxidant and water in mass ratio 1:0.01~10 is configured to oxidizing agent solution, and band is soaked
For bubble in aqueous oxidizing agent solution, the mass ratio of band and oxidizing agent solution is 1~50:100, soaked at being 20~80 DEG C in temperature
1~20 day；
d）Organic acid soln soaks：By organic acid and water in mass ratio 10~30:100 are configured to organic acid soln, and band is soaked
For bubble in aqueous solutions of organic acids, the mass ratio of band and organic acid soln is 1~50:100, soaked at being 20~80 DEG C in temperature
1~48 hour, rinse and dry, obtain pure waste and old polytetrafluoroethylene (PTFE) filter bag band；
The b）Surfactant is nine fluorine butane potassium sulfonates, 15 fluorine ammonium caprylates, 15 fluorine Sodium Caprylates or 15 fluorine in step
Potassium octanoate；
Methods described removes a part of particle thing using surfactant solution, then carbon black is oxidized into two using oxidizing agent solution
Carbonoxide, the characteristics of then easily forming complex using organic acid and metal ion, is using organic acid soln dissolving metal oxidation
Thing.
A kind of 2. cleaning method of waste and old polytetrafluoroethylene (PTFE) filter bag according to claim 1, it is characterised in that：The c）Step
Oxidant is potassium permanganate, potassium bichromate, sulfuric acid, sodium hypochlorite, hydrogen peroxide, perchloric acid, nitric acid, sodium bismuthate, high iodine in rapid
Acid or Na2Fe04.
A kind of 3. cleaning method of waste and old polytetrafluoroethylene (PTFE) filter bag according to claim 1, it is characterised in that：The d）Step
Organic acid is disodium ethylene diamine tetraacetate, ethylenediamine tetrapropionic acid, cyclohexanediamine tetraacetic acid, oxalic acid, ethylene glycol diethyl ether in rapid
Ethylenediamine tetraacetic acid (EDTA), the acetic acid of trientine six, succinic acid, tartaric acid, citric acid or malic acid.
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| CN105666740B (en) * | 2016-03-01 | 2017-10-31 | 浙江理工大学 | A kind of cleaning and recovery method of waste and old polytetrafluoroethylene (PTFE) and polyphenylene sulfide blending filter bag |
| CN106926391B (en) * | 2017-03-06 | 2019-01-29 | 刘新华 | A kind of engineering plastics waste disposal method |
| CN110064256A (en) * | 2019-03-28 | 2019-07-30 | 华电电力科学研究院有限公司 | A kind of coal-burning power plant's bag-type duster filtering bag cleaning solution and cleaning method |
| US11213866B2 (en) | 2019-06-12 | 2022-01-04 | Ethicon, Inc | Non-hazardous cleaning solution and process for cleaning blackened needles |
| CN110696223A (en) * | 2019-10-17 | 2020-01-17 | 安徽工业大学 | Cleaning and recycling equipment and method for waste filter bags |
| CN114804817B (en) * | 2022-04-11 | 2023-07-07 | 厦门中创环保科技股份有限公司 | Preparation method of efficient aerogel heat-insulating material |
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| CN102389880A (en) * | 2011-09-19 | 2012-03-28 | 河南电力试验研究院 | Method for cleaning filter bag for cloth-bag or electric-bag dust collector |
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