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Preparation method of specific composite filter material for coal-fired power plant electric bag integration project

A technology of coal-fired power plants and composite filter materials, which is applied in separation methods, chemical instruments and methods, filtration and separation, etc., can solve the problems of unreachable service life, unfavorable wide-scale promotion, and high price, so as to improve service life, Improve the cleaning ability, strong and non-attenuating effect

Inactive Publication Date: 2010-08-18
NANJING JIHUA 3521 SPECIAL EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

100% PPS (polyphenylene sulfide) filter material has a severe drop in strength due to chemical corrosion and cannot reach the service life
The 100% PTFE (polytetrafluoroethylene) filter material can meet the requirements of this special working condition in terms of performance, but its price is expensive, which is not conducive to large-scale promotion

Method used

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  • Preparation method of specific composite filter material for coal-fired power plant electric bag integration project
  • Preparation method of specific composite filter material for coal-fired power plant electric bag integration project
  • Preparation method of specific composite filter material for coal-fired power plant electric bag integration project

Examples

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preparation example Construction

[0019] A kind of preparation method of special composite filter material for coal-fired power plant electric bag combined project according to the present invention, see figure 2 , the preparation method forms a plain felt through the composite process of needle punching and spunlace, and then impregnates it with a chemical solvent to make a special composite filter material for the coal-fired power plant electric bag integration project. The dust-facing surface of the obtained composite filter material is made of PTFE fiber and PPS fiber blending, in which the weight ratio of PTFE fiber is 30-70%; the base fabric is made of 100% PTFE filament interwoven in warp and weft; the bottom layer is made of PTFE fiber and PPS fiber blending, in which the weight ratio of PTFE fiber is 30- 70%; the specific steps are as follows:

[0020] 1) First, pre-open the PTFE fiber and PPS fiber, and then perform the initial opening;

[0021] 2) then combing the opened composite fibers and then ...

Embodiment 1

[0027] 2.2dtex PTFE fibers and 2.2dtexPPS fibers are mixed on the dust-facing surface to obtain composite fibers, in which the proportion of PTFE fibers is 30%; 2 ;The bottom layer is 100% 2.2dtexPPS fiber; as above figure 2 It is processed by advanced processing technology and made into a special composite filter material for coal-fired power plant electric bag combination project. Wherein the chemical solvent is prepared from PTFE emulsion and water, the solid content of the PTFE emulsion is 60%, and the weight percentage of PTFE in the modified solvent is 10%.

[0028] The warp and weft tensile strength of the special composite filter material for coal-fired power plant electric bag combined with the project prepared by the present invention exceeds 1200N / 5*20cm, which is 20% stronger than the 100%PPS filter material prepared by the acupuncture method, especially The fracture strength in the warp direction is increased by nearly 50%, and the fracture strength in the warp ...

Embodiment 2

[0030] 2.2dtex PTFE fibers and 2.2dtexPPS fibers are mixed on the dust-facing surface to obtain composite fibers, in which the proportion of PTFE fibers is 50%; 2 ;The bottom layer is 100% 2.2dtexPPS fiber; as above figure 2 It is processed by advanced processing technology to make a special composite filter material for coal-fired power plant electric bag combination project; the chemical solvent is made of PTFE emulsion and water, the solid content of PTFE emulsion is 60%, and the weight percentage of PTFE in the modified solvent is 15%.

[0031] The warp and weft tensile strength of the special composite filter material for coal-fired power plant electric bag combined with the project prepared by the present invention exceeds 1200N / 5*20cm, which is 20% stronger than the 100%PPS filter material prepared by the acupuncture method, especially The fracture strength in the warp direction is increased by nearly 50%, and the fracture strength in the warp and weft directions is c...

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Abstract

The invention discloses a preparation method of a specific composite filter material for a coal-fired power plant electric bag integration project; in the preparation method, a dust facing surface is mixedly blended from PTFE fibers and PPS fibers, wherein the weight proportion of the PTFE fibers is 30 to 70 percent; base cloth is interwoven from 100 percent PTFE long filaments in longitude and latitude directions; a bottom layer is mixedly blended from the PTFE fibers and the PPS fibers, wherein the weight proportion of the PTFE fibers is 30 to 70 percent; and a plain blanket is formed through an acupuncture and spunlace composite process, and is soaked in chemical solvent, to prepare the specific composite filter material for the coal-fired power plant electric bag integration project. The preparation method overcomes the defects of the traditional electric bag integration project that the oxidizability and the acid corrosion of the flue gas are strong so the 100 percent PPS loses effectiveness because of oxidation and chemical corrosion, improves the oxidation resistance, prolongs the service life, improves the permeability, the tensile strength and the filtration precision of filter material, and reduces the operation resistance of the equipment.

Description

technical field [0001] The invention relates to a filter material, in particular to a preparation method of a special composite filter material for coal-fired power plant electric bag combination project. Background technique [0002] At present, in the field of flue gas bag dust removal in coal-fired power plants, PPS needle-punched filter materials are widely used due to their good temperature resistance, withstanding temperatures of 140-190°C, and strong acid and alkali corrosion resistance, but their biggest disadvantages are Poor oxidation and corrosion resistance limits its application in electric bag bonding projects. [0003] For the electric bag combination project of coal-fired power plants, the combination of electric dust removal and bag dust removal is used. Corona discharge will generate ozone, which is very unstable. It is easy to react quickly with other components in the flue gas at high temperature and certain humidity, especially Yes and NO, SO 2 The rea...

Claims

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Application Information

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IPC IPC(8): B01D39/08B01D46/02D04H1/46B32B5/08B32B5/26D04H1/4318D04H1/4326D04H1/4382D04H1/72
Inventor 刘江峰于淼涵阳建军刘建祥
Owner NANJING JIHUA 3521 SPECIAL EQUIP
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