Corrosion-resisting and heat-resisting compound filter material and preparation method thereof

A composite filter material, high temperature resistance technology, applied in separation methods, chemical instruments and methods, filtration and separation, etc., to achieve the effect of reducing operating costs, strong corrosion resistance, and avoiding high requirements

Active Publication Date: 2010-12-01
JIANGSU FILTERTEX FILTER MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to: aim at the problems existing in the main filter materials commonly used in the flue gas purification of coal-fired boilers and garbage incinerators, to propose a corrosion-resistant and high-temperature resistant filter material made of multiple fibers and its Preparation

Method used

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  • Corrosion-resisting and heat-resisting compound filter material and preparation method thereof
  • Corrosion-resisting and heat-resisting compound filter material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Preparation of dipping solution

[0025] Mix polytetrafluoroethylene emulsion (provided by Guangzhou Songbai Chemical Co., Ltd.), 285-1 benzyl silicone oil emulsion (provided by Jiangyin Shuangxiong New Material Co., Ltd.) and water according to the weight ratio of 12:4:59, stir well and set aside .

Embodiment 2

[0027] Preparation of corrosion-resistant and high-temperature resistant composite filter material

[0028] 1) Treatment of base cloth:

[0029] The base fabric is made of glass fiber woven fabric (outsourced processing), and the weight per unit area of ​​the base fabric is 300g / m 2 .

[0030] Soak the base cloth in the impregnating liquid of Example 1. After the base cloth is completely soaked, drain the impregnating liquid, air-dry it or dry it with a baking equipment before use.

[0031] 2) Production of upper and lower filter layers:

[0032] Select polyester chemical fibers with specifications of 2.5d-2.8d, glass fibers with specifications of 5d-7d, polyphenylene sulfide fibers with specifications of 2d-2.5d, polyamide fibers with specifications of 5d-7d and 5d-7d The polytetrafluoroethylene fibers are prepared according to 55-65g, 45-55g, 40-50g, 35-45g and 30-40g per square meter respectively, and after they are evenly mixed, they are made into filter felts by acupun...

Embodiment 3

[0038]The present invention (embodiment 2 provides) contrasts with the use effect of PPS needle-punched felt and PTFE needle-punched felt filter material:

[0039] filter material

[0040] PTFE filter material

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Abstract

The invention relates to a corrosion-resisting and heat-resisting compound filter material and a preparation method thereof. The compound filter material comprises a base fabric and filter felts, wherein the upper surface and the lower surface of the base fabric are both coated with the filter felts, and the surface of an upper filter layer of the upper surface is coated with a polytetrafluoroethylene membrane; the base fabric is impregnated with an impregnating liquid; the filter felts on the upper surface are all prepared by mixing chemical polyester fiber, glass fiber, polyphenylene sulfide fiber, polyarmide fiber and polytetrafluoroethylene fiber; the filter felt on the lower surface is prepared by mixing chemical polyester fiber, glass fiber, polyphenylene sulfide fiber and polyarmide fiber; and the lengths of all the fiber materials ranges from 60 to 70 mm. The preparation method comprises the following steps of: weaving the glass fiber into a woven base fabric; impregnating the woven base fabric, drying for use; making the filter felts on the upper surface and the lower surface, and coating the filter felts on the upper surface and the lower surface to form a compound filter felt; impregnating once again, and drying; and finally, coating the polytetrafluoroethylene membrane on the surface of the upper filter layer.

Description

technical field [0001] The invention relates to a filter material and a preparation method thereof, in particular to a corrosion-resistant and high-temperature resistant composite filter material used for flue gas purification of coal-fired boilers and garbage incinerators and a preparation method thereof. Background technique [0002] At present, the filter materials used in the flue gas purification system of coal-fired boilers and waste incinerators are mainly polyphenylene sulfide (PPS) needle felt, or polytetrafluoroethylene (PTFE) fiber needle felt, or glass fiber coated The filter material of tetrafluoroethylene membrane, among them, PPS needle felt has poor oxidation resistance, cannot adapt to the filtration environment under high oxygen state, and has no water repellency, and it is easy to cause bag paste when it is operated at low or high temperature. , affecting the effect of flue gas purification. The normal service life of PPS needle felt is generally 1 to 2 y...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/14B32B5/26
Inventor 王爱民杨福良孙月芹
Owner JIANGSU FILTERTEX FILTER MATERIAL
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