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Preparation method for ceramic fiber filter pipe for high-temperature flue gas purification

A ceramic fiber, high temperature flue gas technology, applied in chemical instruments and methods, separation methods, ceramic molding machines, etc., can solve problems such as poor gas permeability, and achieve low filtration resistance, high porosity and gas permeability, The effect of high filtering precision

Pending Publication Date: 2021-07-20
WESTERN BAODE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for preparing a ceramic fiber filter tube for high-temperature flue gas purification, so as to solve the problem of poor gas permeability in the prior art

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0020] A method for preparing a ceramic fiber filter tube for purifying high-temperature flue gas, specifically according to the following steps:

[0021] Step 1, mixing water, dispersant, organic binder and inorganic binder uniformly in proportion to obtain a mixed solution;

[0022] Step 2, adding ceramic fibers to the mixed solution obtained in step 1, and mechanically stirring at a speed of 500-800 rpm / h to obtain a slurry;

[0023] Step 3, injecting the slurry obtained in step 2 into a suction filter mold for vacuum suction filtration, wet demoulding after preforming, and obtaining a ceramic fiber green body;

[0024] In step 4, the ceramic fiber body is dried and solidified, degreased, and then sintered at high temperature to obtain a ceramic fiber filter tube.

[0025] In step 1, the mass ratio of dispersant to water is 0.3:57.1~71.4, the mass ratio of dispersant to organic binder is 0.3:2.6~3.3, and the mass ratio of dispersant to inorganic binder is 0.3:25~ 40.

[...

Embodiment 1

[0032] A method for preparing a ceramic fiber filter tube for purifying high-temperature flue gas, specifically according to the following steps:

[0033] Step 1, mix water, dispersant, organic binder and inorganic binder uniformly in proportion, the mass ratio of water, dispersant, organic binder, inorganic binder is 71.4:0.3:3.3:25, obtain A mixed solution, wherein the dispersant is hydroxyethyl methylcellulose, the organic binder is polyvinyl alcohol, and the inorganic binder is aluminum dihydrogen phosphate;

[0034] Step 2, adding ceramic fibers to the mixed solution obtained in step 1, the diameter of the ceramic fibers is 3-5 μm, the length of the ceramic fibers is 500 μm, and the amount of the ceramic fibers added is 10% of the content of the mixed solution, at a rate of 500rpm / h Speed ​​mechanical stirring for 1h to obtain slurry;

[0035] Step 3, inject the slurry obtained in step 2 into a suction filter mold for vacuum suction filtration, the suction filtration pre...

Embodiment 2

[0038] A method for preparing a ceramic fiber filter tube for purifying high-temperature flue gas, specifically according to the following steps:

[0039] Step 1, mix water, dispersant, organic binder and inorganic binder uniformly in proportion, the mass ratio of water, dispersant, organic binder, inorganic binder is 57.1:0.3:2.6:40, obtain The mixed solution, wherein the dispersant is polyvinylpyrrolidone, the organic binder is hydroxyethyl methylcellulose, and the inorganic binder is aluminum dihydrogen phosphate;

[0040] Step 2, adding ceramic fibers to the mixed solution obtained in step 1, the diameter of the ceramic fibers is 3-5 μm, the length of the ceramic fibers is 50 μm, and the amount of the ceramic fibers added is 20% of the content of the mixed solution, at a rate of 800rpm / h Speed ​​mechanical stirring for 1.5h to obtain a slurry;

[0041] Step 3, inject the slurry obtained in step 2 into a suction filter mold for vacuum suction filtration, the suction filtra...

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Abstract

The invention discloses a preparation method for a ceramic fiber filter pipe for high-temperature flue gas purification. The preparation method comprises the following steps: S1, uniformly mixing water, a dispersant, an organic binder and an inorganic binder in proportion to obtain a mixed solution; S2, adding a ceramic fiber into the mixed solution obtained in the S1 to obtain slurry; S3, injecting the slurry obtained in the S2 into a suction die for vacuum filtration, and carrying out wet demolding after pre-forming to obtain a ceramic fiber blank; and S4, drying and curing the ceramic fiber blank, degreasing the ceramic fiber blank, and then sintering the ceramic fiber blank at a high temperature to obtain the ceramic fiber filter pipe. The ceramic fiber filter pipe prepared by the invention is low in filter resistance, high-temperature-resistant, high in filter precision, long in service life and high in filter efficiency.

Description

technical field [0001] The invention belongs to the technical field of smoke and dust filtration, and relates to a preparation method of a ceramic fiber filter tube for high-temperature smoke purification. Background technique [0002] In my country's chemical industry, petroleum, metallurgy, electric power, cement and other industries, the high-temperature dust-containing gas produced by various industrial furnaces is not only high in temperature, but also contains a large amount of dust and harmful gases, which is one of the main factors causing environmental pollution. One, it is therefore necessary to dedust these high temperature dusty gases. [0003] At present, high-temperature dust removal technologies such as bag dust removal, wet dust removal, electrostatic dust removal, cyclone dust removal and other technologies have achieved many successful cases in the market, but most of the above dust removal technologies have some problems in the application process of exhaus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B28B1/26B28B11/24B01D46/24
CPCB28B1/265B28B11/243B01D46/24B01D2258/0283
Inventor 李荣王琳刘高建
Owner WESTERN BAODE TECH CO LTD
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