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A kind of preparation method of high temperature superfine dust filter tube

A dust filtration, high temperature technology, applied in separation methods, filtration separation, chemical instruments and methods, etc., can solve the problems of difficult to fully exert excellent performance, expensive mullite fiber, poor thermal shock resistance of corundum, etc., to achieve excellent high temperature Effects of high oxidation resistance, high reproducibility and low surface resistance

Active Publication Date: 2022-03-08
江苏开创环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, corundum has poor thermal shock resistance and is expensive, cordierite is not resistant to corrosion, and mullite fiber is expensive, making it difficult to popularize these materials.
Silicon carbide is a compound with strong covalent bonds, which has good high temperature resistance and chemical corrosion resistance, high strength, good thermal shock stability, high filtration accuracy and long service life, and can be used as a high temperature dust removal device The filter element is irreplaceable by other filter materials, but due to the lack of current formula and sintering technology, it is difficult to fully exert the excellent performance of related products

Method used

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  • A kind of preparation method of high temperature superfine dust filter tube

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The high temperature ultrafine dust filter tube is prepared according to the following steps:

[0027] (1) In terms of parts by mass, 55 parts of silicon carbide (the particle size is 90 μm, and the purity is 97%), 25 parts of makeup soil (the purity is ≥93%, and the particle size is 40 μm), 8 parts of epoxy grease (the purity is ≥ 98%), 6 parts of fused silica sand (purity ≥ 97%, particle size is 40 μm), 6 parts of water glass (modulus 2.5), 0.05 part of preservative (pH is 4) mix uniformly, grind until the particle size is 80 μm, get mixed powder;

[0028] (2) Fully mix the above-mentioned mixed powder with deionized water accounting for 15% of the mixed powder mass to obtain a slurry;

[0029] (3) Coat the above-mentioned slurry in the mould, adopt the rotary extrusion molding method, and use the frequency conversion speed regulation rotary rod to extrude the material, so that the material is pressed and formed under a certain pressure; wherein, the specific conditi...

Embodiment 2

[0034] The high temperature ultrafine dust filter tube is prepared according to the following steps:

[0035] (1) In terms of parts by mass, 70 parts of silicon carbide (its particle size is 60 μm and its purity is 98%), 10 parts of makeup soil (its purity is ≥90%, its particle size is 20 μm), 10 parts of epoxy grease (its purity is ≥ 98%), 5 parts of fused silica sand (purity ≥ 97%, particle size is 20 μm), 5 parts of water glass (modulus 3.5), 0.1 part of preservative (pH is 2) mix uniformly, grind to particle size and be 50 μ m, obtain mixed powder;

[0036] (2) Fully mix the above-mentioned mixed powder with deionized water accounting for 12% of the mixed powder mass to obtain a slurry;

[0037] (3) Coat the above-mentioned slurry in the mould, adopt the rotary extrusion molding method, and use the frequency conversion speed regulation rotary rod to extrude the material, so that the material is pressed and formed under a certain pressure; wherein, the specific conditions ...

Embodiment 3

[0042] The high temperature ultrafine dust filter tube is prepared according to the following steps:

[0043](1) In terms of parts by mass, 50 parts of silicon carbide (its particle size is 50 μm, and its purity is 99%), 25 parts of makeup soil (its purity is ≥90%, its particle size is 60 μm), 10 parts of epoxy grease (its purity is ≥ 98%), 8 parts of fused silica sand (purity ≥ 97%, particle size is 10 μ m), 7 parts of water glass (modulus 1.5), 0.5 parts of preservative (pH is 3) mix uniformly, grind to particle diameter and be 20 μ m, obtain mixed powder;

[0044] (2) fully mix the above-mentioned mixed powder with water accounting for 8% of the mixed powder mass to obtain a slurry;

[0045] (3) Coat the above-mentioned slurry in the mould, adopt the rotary extrusion molding method, and use the frequency conversion speed regulation rotary rod to extrude the material, so that the material is pressed and formed under a certain pressure; wherein, the specific conditions of th...

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Abstract

The invention discloses a method for preparing a high-temperature ultrafine dust filter tube, which comprises, in terms of mass percentage, 50-85% of silicon carbide, 5-30% of make-up soil, 5-30% of epoxy grease, and 2-30% of fused silica sand. 20%, water glass 2-20%, preservative 0.05-3%, mix evenly, grind to obtain mixed powder, then mix with deionized water to obtain slurry, and then adopt rotary extrusion molding method, use frequency conversion speed regulation rotating rod to extrude Press the material to make the material shape under a certain pressure, and finally burn it in the kiln to obtain a high-temperature ultra-fine dust filter tube after coating. The preparation process of the invention has simple operation, good repeatability, uniform mixing and reaction, short preparation time, low sintering temperature, low energy and cost, good high temperature oxidation resistance, and is suitable for filtering ultrafine dust at high temperature.

Description

technical field [0001] The invention belongs to the technical field of dust filter tube manufacturing, and in particular relates to a method for preparing a high-temperature ultrafine dust filter tube. Background technique [0002] In chemical industry, metallurgy, petroleum, electric power and other industries, a large amount of high-temperature dust-containing gas is often discharged, which seriously pollutes the atmospheric environment and poses a huge threat to human health. On this basis, it is necessary to carry out dedusting treatment on these high-temperature dust-laden gases to meet environmental protection emission standards and reduce pollution. However, under high temperature conditions, the agglomeration of fine particles is greatly reduced, and it is difficult to separate the particles, and engineering problems such as equipment materials, structural forms, and thermal expansion used at high temperatures often affect the effective and normal operation of the eq...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D39/20
CPCB01D39/20
Inventor 顾益平崔永杰周成许学良
Owner 江苏开创环保科技有限公司