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Specific composite filter material for coal-fired power plant electric bag integration project

A composite filter material, a technology for coal-fired power plants, applied in filtration separation, combined device, dispersed particle separation, etc., can solve the problems of decreased strength of PPS filter material, inability to achieve service life, unfavorable wide-scale promotion, etc. Ashing capacity and corrosion resistance, improving service life, and improving the effect of cleaning capacity

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

The strength of 100% PPS filter material drops sharply 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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  • Specific composite filter material for coal-fired power plant electric bag integration project
  • Specific composite filter material for coal-fired power plant electric bag integration project
  • Specific composite filter material for coal-fired power plant electric bag integration project

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The dust-facing surface 2 is mixed with 2.2dtex PTFE fibers and 2.2dtexPPS fibers to obtain composite fibers, in which the proportion of PTFE fibers is 30%; the base fabric 1 is 2.2dtex PTFE filaments interwoven in warp and weft direction, and the grammage is 120g / m 2 . The bottom layer 3 is formed by blending 2.2dtexPTFE fibers and 2.2dtexPPS fibers, wherein the weight ratio of PTFE fibers is 30%.

[0017] according to figure 2 It is processed by the processing technology shown, and it is made into a special composite filter material for coal-fired power plant electric bag combination project. The preparation method is as follows:

[0018] 1) First, pre-open the PTFE fiber and PPS fiber, and then perform the initial opening;

[0019] 2) then carry out cross-lapping after carding the composite fibers after opening to form a dust-facing surface; the weight ratio of PTFE fibers in the dust-facing surface is 30%;

[0020] 3) according to above-mentioned same flow proce...

Embodiment 2

[0025] The dust-facing surface 2 is mixed with 2.2dtex PTFE fibers and 2.2dtexPPS fibers to obtain composite fibers, wherein the proportion of PTFE fibers is 50%; the base fabric 1 is 2.2dtex PTFE filaments interwoven in the warp and weft directions, and the grammage is 150g / m 2 ; The bottom layer 3 is formed by blending 2.2dtexPTFE fibers and 2.2dtexPPS fibers, wherein the weight ratio of PTFE fibers is 50%.

[0026] according to figure 2 The processing technology shown is processed to make a special composite filter material for coal-fired power plant electric bag combination project, and the specific preparation method is as in Example 1.

[0027] The warp and weft tensile strength of the present invention is more than 1200N / 5*20cm, which is 20% stronger than the 100% PPS filter material prepared by acupuncture method, especially the warp and weft breaking strength is increased by nearly 50%. The breaking strength is close, which effectively improves the service life; the...

Embodiment 3

[0029] The dust-facing surface 2 is mixed with 2.2dtex PTFE fibers and 2.2dtexPPS fibers to obtain composite fibers, in which the proportion of PTFE fibers is 70%; the base fabric 1 is 2.2dtex PTFE filaments interwoven in the warp and weft directions, and the grammage is 140g / m 2 ; The bottom layer 3 is formed by blending 2.2dtexPTFE fibers and 2.2dtexPPS fibers, wherein the weight ratio of PTFE fibers is 70%.

[0030] according to figure 2 The processing technology shown is processed to make a special composite filter material for coal-fired power plant electric bag combination project, and the specific preparation method is as in Example 1.

[0031] The warp and weft tensile strength of the present invention is more than 1200N / 5*20cm, which is 20% stronger than the 100% PPS filter material prepared by acupuncture method, especially the warp and weft breaking strength is increased by nearly 50%. The breaking strength is close, which effectively improves the service life; th...

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Abstract

The invention discloses a specific composite filter material for a coal-fired power plant electric bag integration project; the composite filter material comprises base cloth, a dust facing surface and a bottom layer; the dust facing surface is arranged on the upper surface of the base cloth; the bottom layer is arranged on the lower surface of the base cloth; the 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; the base cloth is interwoven from 100 percent PTFE long filaments in the longitudinal and latitude directions; and the 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. The fibers tangle through an acupuncture and spunlace composite process to form a plain blanket which is soaked into chemical solvent, so as to further improve the corrosion resistance and chemical performance resistance. The specific composite filter material for the coal-fired power plant electric bag integration project has smooth surface, improves the dust removing capability, reduces the operation resistance of equipment, prolongs the service life, can ensure the use for 35000h in the electric bag integration project, and is applicable to the coal-fired power plant electric bag integration project.

Description

technical field [0001] The invention relates to a filter material, in particular to 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 reaction produces SO 3 , N...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/14B32B5/26B01D50/00
Inventor 刘江峰于淼涵阳建军刘建祥
Owner NANJING JIHUA 3521 SPECIAL EQUIP
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