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High silica fiber woven tectorial membrane filter material for coal-fired boiler and preparation method of high silica fiber woven tectorial membrane filter material

A high-silica fiber, coal-fired boiler technology, applied in separation methods, chemical instruments and methods, textile material processing and other directions, can solve problems such as high energy consumption and short service life, and achieve high filtration accuracy and corrosion resistance. Improve and stabilize the efficiency of smoke and dust purification

Active Publication Date: 2015-05-20
ZHEJIANG HONGSHENG NEW MATERIAL TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the problems of filtration accuracy, high energy consumption and short service life of existing filter materials in the working conditions of coal-fired power plants, and provides a high-silica fiber woven film-coated filter material for coal-fired boilers and a preparation method thereof

Method used

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  • High silica fiber woven tectorial membrane filter material for coal-fired boiler and preparation method of high silica fiber woven tectorial membrane filter material
  • High silica fiber woven tectorial membrane filter material for coal-fired boiler and preparation method of high silica fiber woven tectorial membrane filter material
  • High silica fiber woven tectorial membrane filter material for coal-fired boiler and preparation method of high silica fiber woven tectorial membrane filter material

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Experimental program
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Effect test

Embodiment 1

[0034] Select high-quality high-silica fibers with a silica content greater than 96% and twist them into yarns to make 156tex and 204tex yarns respectively. 204tex yarn high-silica fiber yarn is bulked, and the blowing pressure is 0.6bar high-pressure airflow, so that the yarn is fluffy, the surface is more hairy, the specific surface area is increased, the dust collection efficiency is improved, and the bulking speed of the bulked yarn machine is improved. 280m / min.

[0035] The 156tex high-silica fiber yarn enters the sizing process, and the surface of the yarn is covered with a layer of size to improve the weaving performance of the product, reduce end breakage and fabric surface defects, and improve quality and production efficiency. The low-temperature sizing process is adopted, the slurry temperature is 80°C, and the sizing speed is 60m / min.

[0036] The weaving process adopts the double-layer variable twill weaving process, so that the product has a double-layer struct...

Embodiment 2

[0041] Select high-quality high-silica fibers with a silica content greater than 96% and twist them into yarns to make 136tex and 204tex yarns respectively. 204tex yarn high-silica fiber yarn is bulked, and the blowing pressure is 0.6bar high-pressure airflow, so that the yarn is fluffy, the surface is more hairy, the specific surface area is increased, the dust collection efficiency is improved, and the bulking speed of the bulked yarn machine is improved. 280m / min.

[0042] The 136tex high-silica fiber yarn enters the sizing process, and the surface of the yarn is covered with a layer of size to improve the weaving performance of the product, reduce end breakage and fabric surface defects, and improve quality and production efficiency. The low-temperature sizing process is adopted, the slurry temperature is 80°C, and the sizing speed is 60m / min.

[0043] The weaving process adopts the double-layer variable twill weaving process, so that the product has a double-layer struct...

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Abstract

The invention provides a high silica fiber woven tectorial membrane filter material for a coal-fired boiler. The high silica fiber woven tectorial membrane filter material for the coal-fired boiler comprises four layer of structures, namely an impregnation treatment protective layer, a high silica fiber expanded fabric layer, an impregnation treatment protective layer and a polytetrafluoroethylene microporous membrane layer sequentially, wherein the high silica fiber expanded fabric adopts double-layer woven fabric woven by adopting a double-layer rearranged twill technology; the whole high silica fiber expanded fabric layer is impregnated in an impregnation liquid, and the impregnation treatment protective layer is formed on the surface of the high silica fiber expanded fabric layer; the high silica fiber expanded fabric layer and the impregnation treatment protective layer form a high silica fiber treatment fabric layer; and the polytetrafluoroethylene microporous membrane layer thermally covers the high silica fiber treatment fabric layer. The high silica fiber woven tectorial membrane filter material for the coal-fired boiler has the characteristics of high filtering accuracy, temperature resistance, corrosion resistance, high strength, low flexibility, low resistance, high efficiency and long service life, PM2.5 dust can be efficiently trapped, and the near zero emission of dust less than 5mg / Nm<3> is realized.

Description

technical field [0001] The invention provides a high silica fiber woven film-coated filter material and a preparation method thereof aiming at the problems of the existing filter material in the working condition of coal-fired power plants such as the filtration accuracy, high energy consumption and short service life. Background technique [0002] At present, the flue gas of coal-fired power plants contains a lot of acidic substances, which are easy to corrode the filter bags. At present, the main filter materials of coal-fired power plants are polyphenylene sulfide fiber (PPS) and PPS composite needle felt filter materials. With the in-depth implementation of environmental protection and energy saving and emission reduction policies, the existing problems of filter materials are becoming more and more obvious: 1. It is a matter of filtration accuracy. The collection rate of fine dust such as PM2.5 is low, and the dust emission is 20-30mg / Nm 3 ; The second is the problem o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/14B32B27/06B32B37/06B32B9/04D03D15/00D03D11/00D03D13/00D02J1/02D06B3/10D06B3/04D03D15/267
Inventor 李刚
Owner ZHEJIANG HONGSHENG NEW MATERIAL TECH GRP CO LTD
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