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High-temperature-resistant fiber filtering material for purifying industrial flue gas

A high temperature resistant fiber and industrial flue gas technology, applied in the field of air purification, can solve the problems of poor alkali resistance of polyimide fiber, easy oxidation of polyphenylene sulfide fiber, high price of polytetrafluoroethylene, etc., to improve the fabric feel , high-efficiency and low-resistance filtration performance, improve the effect of anti-oxidation

Active Publication Date: 2016-10-26
JIANGSU FUSHENG ENVIRONMENTAL PROTECTION GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, for the filtration of industrial flue gas, polytetrafluoroethylene fiber, polyphenylene sulfide fiber, polyimide fiber, glass fiber and basalt fiber are mainly used, but polytetrafluoroethylene has high price and poor wear resistance. Polyphenylene sulfide fiber is easily oxidized, polyimide fiber has poor alkali resistance and is prone to hydrolysis. Although glass fiber is cheap, it is easy to break and not wear-resistant, and the filtration performance of fiber filter material determines the degree of flue gas purification. , so it is imminent to develop a fiber filter material with high temperature resistance, excellent filtering effect and low cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Dissolve 100g of nanometer sepiolite powder in 1L of distilled water, oscillate to disperse, and let stand. Take the suspension with a uniform color in the upper layer and filter it with suction, dry it, add 1500ml of dilute hydrochloric acid with a mass fraction of 4%, and acidify it at 60°C to remove some impurities in the sepiolite, then wash it repeatedly with distilled water , filtered, dried, and set aside. Take 10g of acidified nano sepiolite and disperse it in 200ml of ethanol / water solution (v / v=1 / 1), add 15g of intercalation agent CTAB, stir mechanically at 80°C for 6h, suction filter through Buchner funnel, and filter The cake was washed with deionized water until there was no chloride ion or bromide ion (tested with 0.1 mol / L silver nitrate solution), dried at 105°C, cooled, and ground to obtain organic intercalation modified nano sepiolite. Disperse 10g of organic intercalated modified sepiolite in 200ml of ethanol / water solution (v / v=1 / 1), add dropwise 10...

Embodiment 2

[0032] Dissolve 100g of nanometer sepiolite powder in distilled water, vibrate to disperse, and let stand. Take the suspension with a uniform color in the upper layer and filter it with suction, dry it, add 1500ml of dilute hydrochloric acid with a mass fraction of 5%, and acidify it at 60°C to remove some impurities in the sepiolite, then wash it repeatedly with distilled water , filtered, dried, and set aside. Take 10g of acidified nano sepiolite and disperse it in 200ml of ethanol / water solution (v / v=1 / 1), add 12g of intercalation agent CTAB, stir mechanically at 80°C for 6h, suction filter through Buchner funnel, and filter The cake was washed with deionized water until there was no chloride ion or bromide ion (tested with 0.1 mol / L silver nitrate solution), dried at 105°C, cooled, and ground to obtain organic intercalation modified nano sepiolite. Disperse 10g of organic intercalation modified sepiolite in 200ml of ethanol / water solution (v / v=1 / 1), add dropwise 100ml of ...

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Abstract

The invention discloses a high-temperature-resistant fiber filtering material for purifying industrial flue gas, and belongs to the technical field of air purification. The fiber filtering material contains a dust facing surface fiber layer, a base cloth layer and a gas purifying surface fiber layer, wherein the dust facing surface fiber layer is made from composite fiber filtering materials which are prepared through the step of performing mixing, extruding and granulation on modified nano sepiolite, polyphenylene sulfide slices and a high-temperature antioxidant P-EPQ through a twin screw extruder, and PTFE emulsion coats the surfaces of the composite fiber filtering materials by a foam coating method, so that the diameters of filtering holes can be effectively reduced; the base cloth layer is made from fine polyphenylene sulfide fibers; and the gas purifying surface fiber layer is made from coarse polyphenylene sulfide fibers, so that the filtering resistance is not influenced, and the product abrasion resistance improved. According to the high-temperature-resistant fiber filtering material disclosed by the invention, the fact that sepiolite which is low in price is used for the flue gas filtering materials is a new breakthrough, besides, the purifying efficiency of industrial glue gas is improved, the dust removing times is reduced, the use temperature of the filtering materials is increased, and the service life is prolonged.

Description

technical field [0001] The invention belongs to the technical field of air purification, and relates to a high-temperature-resistant fiber filter material for industrial flue gas purification. The filter material can be used in metallurgy, cement, power plants, and garbage incineration, and belongs to the environmental protection filter material. Background technique [0002] At present, with the rapid economic development, the improvement of living standards is accompanied by serious air pollution, the blue sky is getting far away from us, and human health problems are getting worse day by day. The culprit is the discharge of harmful gases such as industrial smoke and vehicle exhaust. In order to purify flue gas, bag filter is widely used in industrial dust removal. As the core part of bag filter, fiber filter material plays an extremely important role. [0003] At present, for the filtration of industrial flue gas, polytetrafluoroethylene fiber, polyphenylene sulfide fibe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/14B32B27/02B32B27/28
CPCB01D39/14B32B5/26B32B2255/02B32B2255/26B32B2262/02B32B2307/306B32B2307/714
Inventor 钱付平洪梅吴胜华
Owner JIANGSU FUSHENG ENVIRONMENTAL PROTECTION GROUP
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