Unlock instant, AI-driven research and patent intelligence for your innovation.

Heat-resistant bag-type dust removal filter medium with polyacrylonitrile preoxidized fibers and preparation method thereof

A technology of preoxidizing fiber and polyacrylonitrile, applied in chemical instruments and methods, separation methods, filtration and separation, etc., to achieve the effect of increasing fiber surface roughness, low resistance value and stable resistance value

Active Publication Date: 2017-12-15
GUANGZHOU FIBER PROD TESTING & RES INST
View PDF26 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Aiming at the current situation that polyacrylonitrile preoxidized fiber is difficult to be applied to high-temperature bag-type dust removal filter material, but at the same time has great potential, one of the purposes of the present invention is to provide a A polyacrylonitrile preoxidized fiber high-temperature-resistant bag filter material with excellent performance and low price is mainly made of polyacrylonitrile preoxidized fiber and polyphenylene sulfide fiber blended on the base fabric, which effectively avoids the polyacrylonitrile preoxidized fiber. Oxidized fiber has the disadvantages of low strength and poor shear strength, and improves the filtration efficiency and dust cleaning performance of its products, and greatly reduces the cost of flue gas pollution control materials, which is helpful to promote the process of environmental protection in my country

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
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Heat-resistant bag-type dust removal filter medium with polyacrylonitrile preoxidized fibers and preparation method thereof
  • Heat-resistant bag-type dust removal filter medium with polyacrylonitrile preoxidized fibers and preparation method thereof
  • Heat-resistant bag-type dust removal filter medium with polyacrylonitrile preoxidized fibers and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Such as figure 1 As shown, the polyacrylonitrile preoxidized fiber high-temperature-resistant bag filter material of this embodiment includes a base layer 1 and a mixed fiber composed of polyacrylonitrile preoxidized fiber and polyphenylene sulfide fiber is entangled on the base layer through a needle punching process. The fiber surface layer 2 on the dust-facing surface and the fiber surface layer 3 on the non-dust-facing surface on the upper and lower surfaces. The length of the polyacrylonitrile preoxidized fiber is 60mm, the length of the polyphenylene sulfide fiber is 80mm, and the mixing ratio of the polyacrylonitrile preoxidized fiber and the polyphenylene sulfide fiber is between 60:40. The ratio of the grammage of the fiber surface layer on the dust-facing surface to the grammage of the fiber surface layer on the non-dust-facing surface is 6:4, and the total grammage of the two fiber surfaces is 500g / m 2 , so that the thickness D1 of the fiber face layer 2 on...

Embodiment 2

[0055] Such as Figure 6 As shown, the polyacrylonitrile preoxidized fiber high-temperature-resistant bag-type dust filter material of this embodiment includes a base layer 1. The mixed fiber composed of polyacrylonitrile preoxidized fiber and polyphenylene sulfide fiber is entangled on the base layer through a needle punching process 1 The dust-facing fiber surface layer 2 on the upper and lower surfaces, the non-dust-facing fiber surface layer 3 , the polytetrafluoroethylene coating 4 and the polytetrafluoroethylene film 5 . The length of the polyacrylonitrile preoxidized fiber is 60mm, the length of the polyphenylene sulfide fiber is 80mm, and the mixing ratio of the polyacrylonitrile preoxidized fiber and the polyphenylene sulfide fiber is between 60:40. The ratio of the weight of the fiber surface layer on the dust face to that of the fiber face layer on the non-dust face is 6:4, and the total weight of the two fiber layers is 500g / m 2 , so that the thickness of the dust...

Embodiment 3

[0058] Antistatic treatment: Select polyacrylonitrile preoxidized fiber with a length of 50mm and polyphenylene sulfide fiber with a length of 75mm, mix them in a mass ratio of 55:35, and spray cationic antistatic with a mass fraction of 2% on the fiber agent, and then sealed at room temperature for 24 hours.

[0059] Opening and carding: Open and mix the fibers after antistatic treatment, and send them to the carding machine. Set the distance between the cylinder and doffer of the carding machine to 0.10mm, and the speed ratio to 1.4.

[0060] Laying: After carding, the fibers are laid alternately according to the laying structure of dust-facing fiber surface layer / woven aramid base fabric / non-dust-facing fiber surface layer, in which the aramid fiber used in low-density aramid woven fabrics is Lun 1313, the density of warp and weft yarns is 45tex, the density of warp and weft is 55 threads / 10cm, and the weight of the fiber net on the dust surface is 360g / m 2 , the weight of...

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
Login to View More

PUM

PropertyMeasurementUnit
Lengthaaaaaaaaaa
Lengthaaaaaaaaaa
Longitudinal breaking strengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a heat-resistant bag-type dust removal filter medium with polyacrylonitrile preoxidized fibers. The dust removal filter medium comprises a base layer, a dust facing surface fiber surface layer and a non-dust facing surface fiber surface layer, wherein mixed fibers composed of the polyacrylonitrile preoxidized fibers and polyphenylene sulfide fibers are wound around the upper surface and lower surface of the base layer through the needle punching technology to form the dust facing surface fiber surface layer and the non-dust facing surface fiber surface layer, and the base layer comprises at least one layer of base cloth; the thickness of the dust facing surface fiber surface layer is larger than that of the non-dust facing surface fiber surface layer, and the length of the polyphenylene sulfide fibers in the dust facing surface fiber surface layer or the non-dust facing surface fiber surface layer is larger than that of the polyacrylonitrile preoxidized fibers. The invention further discloses a preparation method of the dust removal filter medium. The heat-resistant bag-type dust removal filter medium has good properties of being high in strength, heat-resistant, flame-retardant, corrosion-resistant, high in porosity, high in filter efficiency, low and stable in resistance value and easy to remove dust, and is applicable to high-temperature flue gas discharging environment such as steel smelting, waste incineration, thermal power generation, industrial stoves and the like.

Description

technical field [0001] The invention relates to a bag type dust removal filter material, in particular to a polyacrylonitrile preoxidized fiber high temperature resistant bag type dust removal filter material. At the same time, the present invention also relates to a preparation method of the above-mentioned bag-type dust removal filter material. Background technique [0002] The sources of air pollution are mainly concentrated in the waste gas emitted from industrial fields such as iron and steel, metallurgy, thermoelectricity, cement and waste incineration. , Polytetrafluoroethylene (PTFE) and other high-performance fiber filter materials can only work for a long time at a temperature of about 200 ° C. High-temperature flue gas often needs to be cooled by adding a long pipeline before it can be filtered. The prices of high-performance fibers such as aramid, polyphenylene sulfide (PPS), polyimide, and polytetrafluoroethylene (PTFE), which are usually used for high-temperat...

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
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B01D39/08B01D46/02B32B27/30B32B27/42B32B27/02B32B27/12B32B5/02B32B5/24
CPCB01D39/083B01D46/02B32B5/02B32B5/24B01D2239/0613B01D2239/10B32B2262/0223B32B2262/02Y02A50/2351
Inventor 漆东岳于宾王向钦袁彬兰赵晓明杨欣卉倪冰选张鹏雷李娜
Owner GUANGZHOU FIBER PROD TESTING & RES INST