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High temperature resistance basalt fiber composite filter material and preparation method thereof

A basalt fiber and composite filtration technology, which is applied in the direction of filtration separation, separation methods, chemical instruments and methods, etc., can solve the problems of low filtration efficiency, poor softness, loose structure, etc. distribution concentration effect

Inactive Publication Date: 2009-12-30
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because basalt fiber, glass fiber, ceramic fiber, and stainless steel fiber are all inorganic fibers, the fiber is stiff and soft, and it is difficult to entangle and cohere like other fibers during processing. Therefore, the structure of the product is loose, the pore size is large, and the filtration efficiency is low. low strength

Method used

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  • High temperature resistance basalt fiber composite filter material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The polytetrafluoroethylene fiber web (150g / m 2 ), spread on basalt fiber base cloth (350g / m 2 ), the weight ratio of polytetrafluoroethylene fiber mesh and basalt fiber base cloth is 1:2.3, which is strengthened and compounded by spunlace, the net conveying speed is 15m / min, and the spunlace pressure is 180bar. After drying, it is hot-rolled by a hot-rolling mill at a temperature of 230°C and a speed of 10m / s, then impregnated with PTFE emulsion with a concentration of 15%, and then set at 230°C for 18 minutes.

[0025] The specification of the obtained high temperature resistant basalt spunlace composite filter material is 530g / m 2 , Strong: longitudinal strength 1800N (5cm), transverse strength 1400N (5cm), average pore size 0.72μm, air permeability 1.18m / min, filtration resistance 18.14pa.

Embodiment 2

[0027] The polyimide fiber web (170g / m 2 ), spread on basalt fiber base cloth (450g / m 2 ), the weight ratio of polyimide fiber net and basalt fiber base cloth is 1:4.3, which is strengthened and compounded by spunlace, the net conveying speed is 18m / min, and the spunlace pressure is 200bar. After drying, it is hot-rolled by a hot-rolling mill at a temperature of 230°C and a speed of 17m / s, then impregnated with PTFE emulsion with a concentration of 24%, and then set at 250°C for 23 minutes.

[0028] The specification of the obtained high temperature resistant basalt spunlace composite filter material is 650g / m 2 , Strength: longitudinal strength 2100N (5cm), transverse strength 1600N (5cm), average pore size 0.89μm, air permeability 1.52m / min, filtration resistance 16.73pa.

Embodiment 3

[0030] The polyphenylene sulfide fiber web (200g / m 2 ), spread on basalt fiber base cloth (750g / m 2 ), the weight ratio of polyphenylene sulfide fiber net and basalt fiber base cloth is 1:6.8, which is strengthened and compounded by spunlace, the net conveying speed is 23m / min, and the spunlace pressure is 230bar. After drying, it is hot-rolled by a hot-rolling mill at a temperature of 210°C and a speed of 12m / s, then impregnated with PTFE emulsion with a proportion concentration of 18%, and then set at 230°C for 16 minutes.

[0031] The specification of the obtained high temperature resistant basalt spunlace composite filter material is 1000g / m 2 , Strong: longitudinal strength 2400N (5cm), transverse strength 2000N (5cm), average pore size 0.69μm, air permeability 1.04m / min, filtration resistance 20.58pa.

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Abstract

The invention relates to a high temperature resistance basalt fiber composite filter material and a preparation method thereof; the composite filter material comprises basalt fiber base fabric and high-performance fiber mesh in a weight ratio of 7:1-2:1; the preparation method comprises the following steps: forming high-performance fiber mesh on the basalt fiber base fabric, combining and strengthening the material more by spunlaced process, hot rolling the material, then soaking the material in water repellent oil-proofing agent, sizing and obtaining the finished product. The filter material of the invention has the advantages of stable structure, high filtration accuracy, small bore diameter, concentrated pore diameter distribution and high temperature resistance, can bear 450 DEG C of instantaneous high temperature and can be used stablely for long time below 280 DEG C.

Description

technical field [0001] The invention belongs to the field of basalt fiber composite filter material and its preparation, in particular to a high temperature resistant basalt fiber composite filter material and a preparation method. Background technique [0002] High temperature resistant filter material is a kind of flue gas filter material, which has high temperature resistance and corrosion resistance. In many industrial fields, such as cement industry, steel industry, coal-fired power generation industry, non-ferrous metal smelting industry, waste incineration sites, and coal-fired boilers, it is necessary to filter and remove dust from high-temperature flue gas. At present, needle punching and needle punching + film-coating processes are generally used to manufacture flue gas filter materials, and the fibers used are mostly glass fibers. However, the needle punching process has great damage to the fiber; the needle punched film has high resistance and poor wear resistan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/14B01D39/08B32B5/26
Inventor 朱冰靳向煜陈熙婷苏晶
Owner DONGHUA UNIV
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