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High silica fiber woven film-coated filter material for coal-fired boiler and preparation method

A high-silica fiber, membrane-coated filter material technology, applied in separation methods, chemical instruments and methods, and textile material processing, etc., can solve problems such as high energy consumption and short service life, and achieve high filtration accuracy and corrosion resistance. The effect of improved performance and high tensile strength

Active Publication Date: 2016-04-06
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 film-coated filter material for coal-fired boiler and preparation method
  • High silica fiber woven film-coated filter material for coal-fired boiler and preparation method
  • High silica fiber woven film-coated filter material for coal-fired boiler and preparation method

Examples

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 film-coated filter material for coal-fired boilers, which includes a four-layer structure, which is an impregnated protective layer, a high-silica fiber expanded cloth layer, an impregnated protective layer, and polytetrafluoroethylene. Ethylene microporous film layer; the high-silica fiber expanded cloth is a double-layer woven fabric woven by a double-layer variable twill process; the high-silica fiber expanded cloth layer is immersed in the dipping solution as a whole A protective layer for impregnation treatment is formed; the high silica fiber expanded cloth layer and the impregnation treatment protective layer constitute a high silica fiber treatment cloth layer; the polytetrafluoroethylene microporous film layer is thermally laminated on the high silica fiber treatment cloth layer. The high-silica fiber woven film-coated filter material of the present invention has excellent characteristics such as high filtration precision, temperature resistance and corrosion resistance, high strength and low elongation, low resistance, high efficiency and long life, etc. It can efficiently capture PM2.5 dust, and achieve a dust amount of less than 5mg / Near zero emission of Nm3.

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 Patents(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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