Preparation method of temperature-resistant high-intensity pocket-type dedusting filter fiber

A bag-type dust removal, high-strength technology, applied in separation methods, chemical characteristics of fibers, chemical instruments and methods, etc., can solve the problems of difficult processing, large damage, low strength, etc., and achieve strong adsorption and filtration effect and reasonable process matching. , the effect of high fiber strength

Active Publication Date: 2018-12-28
安徽省华瑞网业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although polyacrylonitrile pre-oxidized fiber has excellent high temperature resistance, its shear strength is poor and processing is difficult. The application in the field of high temperature bag filter media is still developing slowly, and industrial production has not yet been formed.
The existing polyacrylonitrile preoxidized fiber used to prepare high temperature resistant bag filter material has the following problems: 1. The polyacrylonitrile preoxidized fiber itself has low strength and poor shear strength, and it is difficult to process. The needling process damages it too much, and the strength of the product is extremely low. It can only be used for sound-absorbing cotton, heat-insulating cotton, etc., and is not suitable for the field of high-temperature bag filter materials; 2. Acupuncture made of polyacrylonitrile pre-oxidized fiber Felt, the surface is rough, but the inner fiber surface is very smooth. This structure has defects such as low filtration efficiency, poor dust cleaning performance, and short service life in the field of bag dust removal. It needs to be replaced frequently, and the cost does not fall but rises.
However, these methods have failed to solve the problem of improving the adaptability of polyacrylonitrile preoxidized fibers in the field of high temperature resistant bag filter materials.

Method used

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  • Preparation method of temperature-resistant high-intensity pocket-type dedusting filter fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A method for preparing a temperature-resistant, high-strength bag filter fiber, comprising the steps of:

[0034] (1) Pretreatment of polyacrylonitrile powder:

[0035] Mix potassium permanganate, succinic acid, and ionic liquid into the mixing tank according to the weight ratio of 3:1:500, and after stirring continuously for 5 minutes, add polyacrylonitrile twice its total mass into the mixing tank Powder, after stirring continuously for 10 minutes, mixture A was obtained for subsequent use;

[0036] (2) Preparation of compound additives:

[0037]a. Mix multi-walled carbon nanotubes, fatty alcohol polyoxyethylene ether, and deionized water in a weight ratio of 1:7:100 and put them into a stirring tank, and then ultrasonically treat them for 1 hour to obtain a mixed solution B for later use;

[0038] b. Pour the mixed solution B obtained in operation a into the polytetrafluoroethylene filter membrane, and then use the suction filter to filter under the environment of ...

Embodiment 2

[0055] A method for preparing a temperature-resistant, high-strength bag filter fiber, comprising the steps of:

[0056] (1) Pretreatment of polyacrylonitrile powder:

[0057] Mix potassium permanganate, succinic acid, and ionic liquid into the mixing tank according to the weight ratio of 4:1.5:530, and after stirring continuously for 8 minutes, add polyacrylonitrile 2.5 times its total mass into the mixing tank Powder, after stirring continuously for 13 minutes, mixture A was obtained for subsequent use;

[0058] (2) Preparation of compound additives:

[0059] a. Mix multi-walled carbon nanotubes, fatty alcohol polyoxyethylene ether, and deionized water in a weight ratio of 1:8:105 and put them into a stirring tank, and then ultrasonically treat them for 1.5 hours to obtain a mixed solution B for later use;

[0060] b. Pour the mixed solution B obtained in operation a into the polytetrafluoroethylene filter membrane, and then use the suction filter to filter under the envir...

Embodiment 3

[0077] A method for preparing a temperature-resistant, high-strength bag filter fiber, comprising the steps of:

[0078] (1) Pretreatment of polyacrylonitrile powder:

[0079] Mix potassium permanganate, succinic acid, and ionic liquid into the mixing tank according to the weight ratio of 5:2:550, and after stirring continuously for 10 minutes, add polyacrylonitrile three times its total mass into the mixing tank Powder, after stirring continuously for 15 minutes, mixture A was obtained for subsequent use;

[0080] (2) Preparation of compound additives:

[0081] a. Mix multi-walled carbon nanotubes, fatty alcohol polyoxyethylene ether, and deionized water in a weight ratio of 1:9:110 and put them into a stirring tank, and then ultrasonically treat them for 2 hours to obtain a mixed solution B for later use;

[0082] b. Pour the mixed solution B obtained in operation a into the polytetrafluoroethylene filter membrane, and then use the suction filter to filter under the enviro...

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Abstract

The invention discloses a preparation method of a temperature-resistant high-intensity pocket-type dedusting filter fiber. The preparation method comprises the following steps: (1) pre-treating polyacrylonitrile powder; (2) preparing a composite additive; (3) carrying out melt spinning treatment; (4) carrying out finalizing. The method is reasonable in process matching; the prepared filter fiber is high in strength, good in machinability and strong in adsorptive filter effect and has market competitiveness and popularization and application values.

Description

technical field [0001] The invention belongs to the technical field of environmental protection materials, and in particular relates to a method for preparing a temperature-resistant, high-strength bag-type dust-removing filter material fiber. 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, and 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-temperature filtration, are generally high, and most steel companies are currently at a loss in order to maintai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/54D01F1/10B01D46/02
CPCB01D46/02D01F1/10D01F6/54
Inventor 张海涛
Owner 安徽省华瑞网业有限公司
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