Preparation method of PBO composite ultra-high temperature filter material

A filter material and ultra-high temperature technology, which is applied in the field of preparation of PBO composite ultra-high temperature filter material, can solve the problems of decreased filter material strength, poor corrosion resistance, uneven air permeability, etc. The effect of uniform air permeability

Active Publication Date: 2010-08-25
南京际华三五二一环保科技有限公司
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Problems solved by technology

However, basalt fiber is brittle, has poor wear resistance and folding resistance, and has poor corrosion resistance to some chemical substances. The filter material made of pure basalt fiber has the above defects.
In the prior art, there are also filter materials blended with basalt fiber and other high-performance fibers, which can improve the wear resistance and folding resistance to a certain extent, but they are all processed by acupuncture, because the acupuncture method mainly relies on the hooking of rigid needles. If the fibers are entangled and reinforced together, the needles will cause greater damage to the fibers, especially the inorganic fiber basalt fiber, resulting in a decrease in the strength of the filter material, uneven air permeability, affecting the service life, and limiting its use in high-temperature flue gas treatment. field application

Method used

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  • Preparation method of PBO composite ultra-high temperature filter material
  • Preparation method of PBO composite ultra-high temperature filter material
  • Preparation method of PBO composite ultra-high temperature filter material

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preparation example Construction

[0017] A preparation method of the PBO composite ultra-high temperature filter material according to the present invention, as shown in Figure 2, the preparation method forms a plain felt through acupuncture and spunlace composite processes, and then undergoes a chemical solvent impregnation treatment to make an ultra-high temperature filter material, The dust-facing surface of the filter material obtained is blended with PBO fiber and basalt fiber, wherein the weight ratio of PBO fiber is 10-15%; the base fabric is made of PBO filament and basalt filament; Proceed as follows:

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

[0019] 2) then combing the opened composite fibers and cross-laying to form a dust-facing surface; the weight ratio of PBO fibers in the dust-facing surface is 10-15%;

[0020] 3) According to the above-mentioned same process, form the bottom layer, the bottom layer is 100% basalt fiber net;

[0021] 4) ...

Embodiment 1

[0024] The dust-facing surface is mixed with 2.2dtex PBO fiber and 7μ basalt fiber to obtain composite fiber, in which the proportion of PBO fiber is 10%; the base fabric is mixed weaving of 2.2dtex PBO filament and 7μ basalt filament, and the grammage is 120g / m 2 ;The bottom layer is 100% 7μ basalt fiber. It is processed according to the above-mentioned processing technology in Fig. 2 to make PBO composite ultra-high temperature filter material.

[0025] 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 solvent is 10%.

[0026] The warp and weft tensile strength of the PBO composite ultra-high temperature filter material prepared by the present invention exceeds 6000N / 5*20cm, which is nearly 2 times higher than that of simple basalt fiber needle felt, and its filtration accuracy reaches 99.999%, and its running resistance is 800Pa about. It can effectively improve th...

Embodiment 2

[0028] The dust-facing surface is mixed with 2.2dtex PBO fiber and 7μ basalt fiber to obtain composite fiber, in which the proportion of PBO fiber is 15%; 2 ;The bottom layer is 100% 7μ basalt fiber. It is processed according to the above-mentioned processing technology in Fig. 2 to make PBO composite ultra-high temperature filter material.

[0029] 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 solvent is 15%.

[0030] The warp and weft tensile strength of the PBO composite ultra-high temperature filter material prepared by the present invention exceeds 7000N / 5*20cm, which is more than 2 times higher than that of simple basalt fiber needle felt, and its filtration accuracy reaches 99.999%, and its running resistance is 800Pa about. It can effectively improve the service life, reduce the running resistance of the equipment, and save energy consumption.

[0031] Ta...

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Abstract

The invention discloses a preparation method of a PBO composite ultra-high temperature filter material, which comprises the following steps that: a plain blanket is formed through an acupuncture and spunlaced composite process, and then soaked in chemical solvent to prepare the ultra-high temperature filter material, the dust facing surface in the prepared filter material comprises PBO and basalt fibers which are blended, wherein the weight proportion of the PBO fibers is 10 to 15 percent; base cloth comprises PBO long filaments and basalt filaments which are interwoven; and a bottom layer adopts 100 percent basalt fibers. The preparation method of the PBO composite ultra-high temperature filter material effectively reduces the damage of the fibers, improves the strong force of the filter material, meets the need of ultra high temperature flue gas treatment, and is applicable to a bag-type dust collector for ultra high temperature flue gas treatment at above 500DEG C.

Description

technical field [0001] The invention relates to a filter material, in particular to a preparation method of a PBO composite ultra-high temperature filter material used for ultra-high temperature flue gas treatment. Background technique [0002] At present, the filter materials used in the field of ultra-high temperature flue gas treatment above 500°C are made of basalt fibers. Basalt fiber is an inorganic fiber, which has the advantages of non-combustibility, good temperature resistance (-269-700°C), high strength, and no shrinkage. However, basalt fiber is brittle, has poor wear resistance and folding resistance, and has poor corrosion resistance to some chemical substances. The filter material made of pure basalt fiber has the above-mentioned defects. In the prior art, there are also filter materials blended with basalt fiber and other high-performance fibers, which can improve the wear resistance and folding resistance to a certain extent, but they are all processed by a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/14B32B5/26
Inventor 于淼涵刘江峰阳建军刘建祥
Owner 南京际华三五二一环保科技有限公司
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