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Preparation method of high-precision coating filter material

A production method and high-precision technology, applied in separation methods, chemical instruments and methods, filtration and separation, etc., can solve the problems of easy filtration, poor folding resistance and wear resistance of glass fibers, and formation of protective films, so as to improve the filtration efficiency. Accuracy, extended service life, and improved corrosion resistance effects

Active Publication Date: 2015-03-25
辽宁新洪源环保材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, most of the temperature-resistant filter and dust-removing cloth bags used in bag-type dust collectors in cement, power plants, steel, carbon black and other industries are made of single material weaving or non-woven, which expose themselves during use. Defects: First, there are different degrees of defects in a single material, such as poor temperature resistance and oxidation resistance of PPS filter material; P84 fiber has poor hydrolysis resistance and high price; PTFE fiber has low tensile strength and high price; glass fiber The folding resistance and wear resistance are slightly worse
The second is to use a filter material made of a single material. Even if the formed powder layer is filtered, the filtration speed should not be too large, otherwise it will be easy to permeate, so the filtration effect is not ideal.
The third is that the flue gas dust produced by different dust points has different temperature, humidity, dust concentration, chemical composition, particle size distribution in the dust, and the composition and content of harmful gases in the flue gas. materials, it is difficult to effectively filter smoke and dust
[0008] Therefore, it is necessary to add a PTFE impregnated layer on the filter material. In the existing method of coating the filter material, the sizing agent used during wire drawing will remain on the surface of the yarn, which will affect the bonding effect of PTFE and the filter material fiber during the impregnation process. It is not conducive to the formation of a protective film on the surface of the filter fiber, thus affecting the improvement of the overall performance of the fabric

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Preparation method of high-precision coating filter material

Examples

Experimental program
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Effect test

Embodiment 1

[0030] The preparation method of high-precision coating filter material of the present invention, comprises the steps:

[0031] 1. The woven 750g / ㎡ glass fiber filter cloth is subjected to heat cleaning treatment, and various additives on the surface of the fabric are removed by high temperature, so as to facilitate subsequent processing; the temperature of heat cleaning is 450°C to 500°C.

[0032] 2. The cleaned filter cloth is pre-impregnated, the impregnation speed is 5m / min, and the treatment formula is as follows:

[0033]

[0034] 3. The pretreated filter cloth enters the drying, drying and heat setting device for smoothing. The drying temperature is 160°C; the drying temperature is 220°C; the heat setting temperature is 290°C, and the speed of drying, drying, and heat setting is 2m / min. The drying zone can take away most of the moisture contained in the filter material with hot air. The temperature in the drying and setting area is high, so that the PTFE molecules ...

Embodiment 2

[0039] The preparation method of high-precision coating filter material of the present invention, comprises the steps:

[0040] 1. The woven 500g / ㎡ glass fiber filter cloth is subjected to heat cleaning treatment, and various additives on the surface of the fabric are removed by high temperature, so as to facilitate subsequent processing; the temperature of heat cleaning is 450°C to 500°C.

[0041] 2. The cleaned filter cloth is pre-impregnated, the impregnation speed is 6m / min, and the treatment formula is as follows:

[0042]

[0043]

[0044] 3. The pretreated filter cloth enters the drying, drying and heat setting device for smoothing. The drying temperature is 165°C; the drying temperature is 225°C; the heat setting temperature is 320°C, and the speed of drying, drying, and heat setting is 3m / min. The drying zone can take away most of the moisture contained in the filter material with hot air. The temperature in the drying and setting area is high, so that the PTF...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The invention provides a preparation method of a high-precision coating filter material. According to the preparation method, the filter material can be well combined with PTFE (Polytetrafluoroethylene), and the performances of the filter material can be improved. The method comprises the following steps: (1) carrying out heat cleaning treatment, namely, performing the heat cleaning treatment on the filter material and removing various assistants on the surface of the filter material at high temperature; (2) performing immersion treatment, that is, performing PTFE immersion treatment on the filter material after heat cleaning treatment; (3) baking, drying, and carrying out heat setting on the filter material after immersion treatment sequentially; (4) coating the filter material after heat setting; and (5) performing volatilization, drying, sintering and heat setting on the filter material after coating treatment sequentially. According to the preparation method of the high-precision coating filter material, the filter material is subjected to heat cleaning treatment before immersion treatment, thus, wiredrawing impregnating compound remained on the surface of the fiber can be effectively removed, and the fabric strength can be ensured not to be lost; the acidic and alkali resistances, the water resistance, the oxidation resistance and the abrasion and folding resistances of the filter material can be effectively improved, and the service life of the filter material can be prolonged.

Description

technical field [0001] The invention relates to a manufacturing method of a filter material, in particular to a manufacturing method of a high-precision coating filter material. Background technique [0002] At present, most of the temperature-resistant filter and dust-removing cloth bags used in bag-type dust collectors in cement, power plants, steel, carbon black and other industries are made of single material weaving or non-woven, which expose themselves during use. Defects: First, there are different degrees of defects in a single material, such as poor temperature resistance and oxidation resistance of PPS filter material; P84 fiber has poor hydrolysis resistance and high price; PTFE fiber has low tensile strength and high price; glass fiber The folding resistance and wear resistance are slightly worse. The second is to use a filter material made of a single material. Even if the formed powder layer is filtered, the filtration speed should not be too large, otherwise ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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IPC IPC(8): B01D39/14B32B17/04B32B17/10B32B27/30B32B27/12
Inventor 李刚
Owner 辽宁新洪源环保材料有限公司
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