CN104629084A - Cleaning method of waste polytetrafluoroethylene filter bag - Google Patents
Cleaning method of waste polytetrafluoroethylene filter bag Download PDFInfo
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- CN104629084A CN104629084A CN201510066611.0A CN201510066611A CN104629084A CN 104629084 A CN104629084 A CN 104629084A CN 201510066611 A CN201510066611 A CN 201510066611A CN 104629084 A CN104629084 A CN 104629084A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
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Abstract
The invention discloses a cleaning method of a waste polytetrafluoroethylene filter bag. The method comprises the following steps: cleaning and immersing the waste polytetrafluoroethylene filter bag sequentially in a surfactant solution, an oxidizer solution and an organic acid solution, rinsing, and baking to obtain the pure waste polytetrafluoroethylene filter bag. The method does not need any organic solvent or ultrasonic treatment, is simple and easy to implement, and is lower in cost, The subsequent sintering and pulverizing techniques are utilized to recover and reutilize the waste polytetrafluoroethylene filter bag.
Description
Technical field
The present invention relates to the purging method of waste and scrap, be specifically related to a kind of purging method of waste and old tetrafluoroethylene filter bag.
Background technology
Current, the smoke discharge amount of the enterprises such as coal-burning power plant, garbage burning factory, cement, Iron and Steel Production accounts for more than 70% of national total emission volumn, is the primary pollution source of air.In air, the particle of below PM2.5 can enter human body alveolar, causes extensive harm to human respiratory, cardiovascular systems, neural system and reproductive system etc.Therefore, in atmospheric polluting material is administered, the removal of fine particle and control discharge are one of emphasis of current concern.Bag type dust removing technology can trap fine dusts, dust pollution thing in effective removal flue gas, therefore it has a wide range of applications in fields such as coal-fired plant boiler dedusting, large-scale cement kiln hood and the dedusting of kiln tail, garbage incinerating tail gas purification, flue gas in power station boiler dedusting, dedusting of blast furnace gas.
Ensure efficiently retaining of PM2.5 fine particle, filter bag is the key of sack cleaner.The main raw material of filter bag has the materials such as tetrafluoroethylene, polyimide, polyphenylene sulfide and aramid fiber.Tetrafluoroethylene is commonly called as " King ", there is excellent chemical resistant properties erosions such as (, resistance to chloroazotic acid corrosion) resistance to strong acid, highly basic, grease, ketone, ethers, thermostability (normal use temperature is-250 ~ 260 DEG C), ageing resistance, do not absorb water, be not hydrolyzed, the performance such as good flame resistance; Be that the dedusting filtering bag of raw material is particularly useful for high temperature and the gas cleaning process of operating mode complexity (as fields such as waste incineration, coal-burning power plant, iron and steel, manufacture of cement) with tetrafluoroethylene.The work-ing life of polytetrafluoroethylfilter filter material is 3-4, about has the waste and old tetrafluoroethylene filter bag of 5000 tons to need to be recycled every year.The treatment process of current waste and old tetrafluoroethylene filter bag mainly contains two kinds: (1) degree of depth landfill; (2) energy recovery is burned.Tetrafluoroethylene is extremely stable, does not degrade decades in the environment, and landfill waste and old tetrafluoroethylene filter bag can bring serious pollution to ecotope, and the method is the very unwise move method processing waste and old tetrafluoroethylene filter bag.In addition, tetrafluoroethylene can burn in incinerator, reclaims the heat energy that it distributes.But the fine particle of the highly toxic substances such as tetrafluoroethylene, R 1216, octafluoroisobutene, fluorophosgene and below PM2.5 can be produced in burning process, atmosphere pollution.Therefore recycle waste and old tetrafluoroethylene filter bag and have important environment protection significance.
The tetrafluoroethylene filter bag normal phase uses under the industrial and mineral condition of the high temperature complexity such as fire coal, cement sintering, waste incineration, the a large amount of brown color material (as shown in Figure 1) of surface deposition, main component is the materials such as the carbon black that produces of the oxide compound of the metals such as iron, copper, aluminium, zinc, lead and incomplete combustion.Therefore, it must clean up completely by tetrafluoroethylene filter bag before recycling.Patent 201410079632 discloses a kind of recovery method of polytetrafluoroethylcellular cellular material, it adopts staple fibre cutting machine that polyfluortetraethylewastes wastes is cut into fine particle, cleaning is carried out successively and drying in the ultrasonic cleaner containing organic solvent and water, again that polytetrafluoroethylene granule high temperature sintering, low temperature is sudden cold, then shatter with ball mill, obtain tetrafluoroethylene and reclaim powder.Patent 200810132358.4 discloses a kind of recovery method of tetrafluoroethylene, and filled polytetrafluoroethylene waste material is carried out ultrasonic cleaning and after drying, obtains tetrafluoroethylene powder by crushing and screening by it.Patent 200710067131.1 discloses a kind of preparation method of polytetrafluoroethylregenerative regenerative powder, polyfluortetraethylewastes wastes carries out cleaning by it, abrasive dust, sieve, sinter, the step such as granulation, obtain polytetrafluoroethylregenerative regenerative powder.Although existing patent discloses the techniques such as pulverizing, sintering and goods processing, unexposed to the cleaning process of waste and old polytetrafluoroethylmaterial material.
Summary of the invention
The object of the present invention is to provide a kind of purging method of waste and old tetrafluoroethylene filter bag, the method first waste and old tetrafluoroethylene filter bag is cut into band, adopted by band surfactant soln, oxidizing agent solution and organic acid soln to clean successively and soak, obtaining pure waste and old tetrafluoroethylene filter bag.
The step of the technical solution used in the present invention is as follows:
A) cutting: with scissors, waste and old tetrafluoroethylene filter bag being cut into length is 10 ~ 100 centimetres, and width is the band of 1 ~ 5 centimetre;
B) surfactant soln washing: tensio-active agent, sodium carbonate and water 1 ~ 20:1 in mass ratio ~ 5:100 is mixed, be mixed with surfactant soln, band is immersed in surfactant soln, the mass ratio of band and surfactant soln is 1 ~ 50:100, washs 1 ~ 5 hour at temperature is 20 ~ 60 DEG C;
C) oxidizing agent solution soaks: oxygenant and water are mixed with oxidizing agent solution in 1:0.01 ~ 10 in mass ratio, band is immersed in aqueous oxidizing agent solution, the mass ratio of band and oxidizing agent solution is 1 ~ 50:100, soaks 1 ~ 20 day at temperature is 20 ~ 80 DEG C;
D) organic acid soln soaks: by organic acid and water in mass ratio 10 ~ 30:100 be mixed with organic acid soln, band is immersed in aqueous solutions of organic acids, the mass ratio of band and organic acid soln is 1 ~ 50:100, soak 1 ~ 48 hour at temperature is 20 ~ 80 DEG C, rinsing is also dried, and obtains pure waste and old tetrafluoroethylene filter bag band.
In described b) step, tensio-active agent is nine fluorine butane potassium sulfonates, 15 fluorine ammonium caprylates, 15 fluorine Sodium octoates or 15 fluorine potassium octanoates.
In described c) step, oxygenant is potassium permanganate, potassium bichromate, sulfuric acid, clorox, hydrogen peroxide, perchloric acid, nitric acid, sodium bismuthate, Periodic acid or Na2Fe04.
In described d) step, organic acid is disodium ethylene diamine tetraacetate, ethylenediamine tetrapropionic acid(EDTP), CDTA, oxalic acid, ethylene glycol diethyl ether ethylenediamine tetraacetic acid (EDTA), trientine six acetic acid, succinic acid, tartrate, citric acid or oxysuccinic acid.
Compared with background technology, the beneficial effect that the present invention has is:
(1) waste and old tetrafluoroethylene filter bag surface deposits main component is the particulate matter such as the carbon black of metal oxide and incomplete combustion generation, this law first adopts surfactant soln to remove a part of particulate matter, adopt oxidizing agent solution that carbon black is oxidized to carbonic acid gas again, then the feature utilizing organic acid and metal ion easily to form title complex adopts organic acid soln dissolution of metals oxide compound, obtains pure waste and old tetrafluoroethylene filter bag.
(2) compare with patent 201410079632, the application's patent does not need organic solvent and ultrasonication; Compare with patent 200810132358.4, the application's patent does not need ultrasonic cleaning; Compare with patent 200710067131.1, this application discloses cleaning program.
(3) of the present invention method is simple, and cost is lower, by follow-up sintering and disintegrating process, and recycling in addition.
Accompanying drawing explanation
Fig. 1 is waste and old tetrafluoroethylene filter bag.
Fig. 2 is the waste and old tetrafluoroethylene filter bag after cleaning by embodiment 2.
Embodiment
Embodiment 1:
A) cutting: with scissors, waste and old tetrafluoroethylene filter bag being cut into length is 10 centimetres, and width is the band of 1 centimetre;
B) surfactant soln washing: by nine fluorine butane potassium sulfonates, anhydrous sodium carbonate and water in mass ratio 1:1:100 mix, be mixed with surfactant soln, band is immersed in surfactant soln, the mass ratio of band and surfactant soln is 1:100, washs 1 hour at temperature is 60 DEG C;
C) oxidizing agent solution soaks: by potassium permanganate and water in mass ratio 1:10 be mixed with oxidizing agent solution, be immersed in by band in aqueous oxidizing agent solution, the mass ratio of band and oxidizing agent solution is 1:100, immersion 20 days at temperature is 20 DEG C;
D) organic acid soln soaks: by anhydrous ethylenediamine tetraacethyl disodium and water in mass ratio 10:100 be mixed with organic acid soln, band is immersed in aqueous solutions of organic acids, the mass ratio of band and organic acid soln is 1:100, soak 48 hours at temperature is 20 DEG C, rinsing is also dried, obtain pure waste and old tetrafluoroethylene filter bag band, be labeled as A.
Embodiment 2:
A) cutting: with scissors, waste and old tetrafluoroethylene filter bag being cut into length is 100 centimetres, and width is the band of 5 centimetres;
B) surfactant soln washing: by 15 fluorine ammonium caprylates, sodium carbonate and water in mass ratio 20:5:100 mix, be mixed with surfactant soln, band is immersed in surfactant soln, the mass ratio of band and surfactant soln is 50:100, washs 5 hours at temperature is 20 DEG C;
C) oxidizing agent solution soak: by massfraction be 98% sulphuric acid soln and water in mass ratio 1:0.01 be mixed with oxidizing agent solution, band is immersed in aqueous oxidizing agent solution, the mass ratio of band and oxidizing agent solution is 50:100, soaks 1 day at temperature is 80 DEG C;
D) organic acid soln soaks: by oxalic acid (H
2c
2o
42H
2o) and water in mass ratio 30:100 be mixed with organic acid soln, band is immersed in aqueous solutions of organic acids, the mass ratio of band and organic acid soln is 50:100, soak 1 hour at temperature is 80 DEG C, rinsing is also dried, obtain pure waste and old tetrafluoroethylene filter bag band, as shown in Figure 2, be labeled as B.
Embodiment 3:
A) cutting: with scissors, waste and old tetrafluoroethylene filter bag being cut into length is 30 centimetres, and width is the band of 2 centimetres;
B) surfactant soln washing: by 15 fluorine Sodium octoates, sodium carbonate and water in mass ratio 5:2:100 mix, be mixed with surfactant soln, band is immersed in surfactant soln, the mass ratio of band and surfactant soln is 20:100, washs 4 hours at temperature is 40 DEG C;
C) oxidizing agent solution soak: by massfraction be 10% chlorine bleach liquor and water in mass ratio 1:8 be mixed with oxidizing agent solution, band is immersed in aqueous oxidizing agent solution, the mass ratio of band and oxidizing agent solution is 40:100, soaks 12 days at temperature is 40 DEG C;
D) organic acid soln soak: by anhydrous acid and water in mass ratio 15:100 be mixed with organic acid soln, band is immersed in aqueous solutions of organic acids, the mass ratio of band and organic acid soln is 12:100, soak 40 hours at temperature is 45 DEG C, rinsing is also dried, obtain pure waste and old tetrafluoroethylene filter bag band, be labeled as C.
Embodiment 4:
A) cutting: with scissors, waste and old tetrafluoroethylene filter bag being cut into length is 80 centimetres, and width is the band of 3 centimetres;
B) surfactant soln washing: by 15 fluorine potassium octanoates, sodium carbonate and water in mass ratio 15:4:100 mix, be mixed with surfactant soln, band is immersed in surfactant soln, the mass ratio of band and surfactant soln is 35:100, washs 2 hours at temperature is 50 DEG C;
C) oxidizing agent solution soaks: by potassium bichromate and water in mass ratio 1:5 be mixed with oxidizing agent solution, be immersed in by band in aqueous oxidizing agent solution, the mass ratio of band and oxidizing agent solution is 25:100, immersion 5 days at temperature is 65 DEG C;
D) organic acid soln soaks: by Citric Acid, usp, Anhydrous Powder and water in mass ratio 20:100 be mixed with organic acid soln, band is immersed in aqueous solutions of organic acids, the mass ratio of band and organic acid soln is 40:100, soak 5 hours at temperature is 70 DEG C, rinsing is also dried, obtain pure waste and old tetrafluoroethylene filter bag band, be labeled as D.
The waste and old tetrafluoroethylene filter bag band cleaned in unwashed waste and old tetrafluoroethylene filter bag and above-mentioned 4 embodiments tests its whiteness according to GB/T 17644-1998 textile fibres whiteness colorimetric assay method, be listed in the table below 1, each embodiment all shows higher whiteness value.
Whiteness value before and after the cleaning of table 1 tetrafluoroethylene filter bag
| Embodiment | Whiteness value |
| A | 85.38％ |
| B | 87.60％ |
| C | 80.27％ |
| D | 85.25％ |
| Unwashed waste and old tetrafluoroethylene filter bag | 25.60％ |
Claims (4)
1. a purging method for waste and old tetrafluoroethylene filter bag, comprises the following steps:
A) cutting: with scissors, waste and old tetrafluoroethylene filter bag being cut into length is 10 ~ 100 centimetres, and width is the band of 1 ~ 5 centimetre;
B) surfactant soln washing: tensio-active agent, sodium carbonate and water 1 ~ 20:1 in mass ratio ~ 5:100 is mixed, be mixed with surfactant soln, band is immersed in surfactant soln, the mass ratio of band and surfactant soln is 1 ~ 50:100, washs 1 ~ 5 hour at temperature is 20 ~ 60 DEG C;
C) oxidizing agent solution soaks: oxygenant and water are mixed with oxidizing agent solution in 1:0.01 ~ 10 in mass ratio, band is immersed in aqueous oxidizing agent solution, the mass ratio of band and oxidizing agent solution is 1 ~ 50:100, soaks 1 ~ 20 day at temperature is 20 ~ 80 DEG C;
D) organic acid soln soaks: by organic acid and water in mass ratio 10 ~ 30:100 be mixed with organic acid soln, band is immersed in aqueous solutions of organic acids, the mass ratio of band and organic acid soln is 1 ~ 50:100, soak 1 ~ 48 hour at temperature is 20 ~ 80 DEG C, rinsing is also dried, and obtains pure waste and old tetrafluoroethylene filter bag band.
2. the purging method of a kind of waste and old tetrafluoroethylene filter bag according to claim 1, is characterized in that: in described b) step, tensio-active agent is nine fluorine butane potassium sulfonates, 15 fluorine ammonium caprylates, 15 fluorine Sodium octoates or 15 fluorine potassium octanoates.
3. the purging method of a kind of waste and old tetrafluoroethylene filter bag according to claim 1, is characterized in that: in described c) step, oxygenant is potassium permanganate, potassium bichromate, sulfuric acid, clorox, hydrogen peroxide, perchloric acid, nitric acid, sodium bismuthate, Periodic acid or Na2Fe04.
4. the purging method of a kind of waste and old tetrafluoroethylene filter bag according to claim 1, is characterized in that: in described d) step, organic acid is disodium ethylene diamine tetraacetate, ethylenediamine tetrapropionic acid(EDTP), CDTA, oxalic acid, ethylene glycol diethyl ether ethylenediamine tetraacetic acid (EDTA), trientine six acetic acid, succinic acid, tartrate, citric acid or oxysuccinic acid.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510066611.0A CN104629084B (en) | 2015-02-09 | 2015-02-09 | A kind of cleaning method of waste and old polytetrafluoroethylene (PTFE) filter bag |
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| CN201510066611.0A CN104629084B (en) | 2015-02-09 | 2015-02-09 | A kind of cleaning method of waste and old polytetrafluoroethylene (PTFE) filter bag |
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| CN104629084B CN104629084B (en) | 2018-02-06 |
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Cited By (6)
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| CN105666740A (en) * | 2016-03-01 | 2016-06-15 | 浙江理工大学 | Cleaning and recovering method for waste polytetrafluoroethylene and polyphenylene sulfide blended filter bag |
| CN106926391A (en) * | 2017-03-06 | 2017-07-07 | 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 |
| CN110696223A (en) * | 2019-10-17 | 2020-01-17 | 安徽工业大学 | Cleaning and recycling equipment and method for waste filter bags |
| US11213866B2 (en) | 2019-06-12 | 2022-01-04 | Ethicon, Inc | Non-hazardous cleaning solution and process for cleaning blackened needles |
| CN114804817A (en) * | 2022-04-11 | 2022-07-29 | 厦门中创环保科技股份有限公司 | Preparation method of efficient aerogel thermal insulation material |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105666740A (en) * | 2016-03-01 | 2016-06-15 | 浙江理工大学 | Cleaning and recovering method for waste polytetrafluoroethylene and polyphenylene sulfide blended filter bag |
| CN106926391A (en) * | 2017-03-06 | 2017-07-07 | 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 |
| CN114804817A (en) * | 2022-04-11 | 2022-07-29 | 厦门中创环保科技股份有限公司 | Preparation method of efficient aerogel thermal insulation material |
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| CN104629084B (en) | 2018-02-06 |
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