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Preparation method of high-temperature ultrafine dust filtering pipe

A dust filtration, high temperature technology, applied in separation methods, filtration separation, chemical instruments and methods, etc., can solve the problems of difficulty in fully exerting excellent performance, expensive mullite fiber, and poor corrosion resistance of cordierite, and achieve excellent high temperature. Oxidation resistance, high reproducibility, long service life effect

Active Publication Date: 2018-11-30
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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  • Preparation method of high-temperature ultrafine dust filtering pipe

Examples

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 preparation method of a high-temperature ultrafine dust filtering pipe. The method comprises the following steps of uniformly mixing 50 to 85 percent of silicon carbide, 5 to30 percent of engobe, 5 to 30 percent of epoxy grease, 2 to 20 percent of melted quartz sand, 2 to 20 percent of water glass and 0.05 to 3 percent of preservatives through being metered in percentageby mass; performing grinding to obtain mixed powder; then, mixing the mixed powder with deionized water to obtain slurry; then, extruding the materials in a rotary extrusion shaping mode by using a variable-frequency speed-regulation rotating rod so that the materials are shaped at a certain pressure; performing film coating; finally, performing firing in a furnace kiln to obtain the high-temperature ultrafine dust filtering pipe. The operation in the preparation process is simple; the repeated performance is good; the material mixing and the reaction are uniform; meanwhile, the preparation time is short; the sintering temperature is low; the energy source and the cost are low; good high-temperature anti-oxidization performance is realized; the filtering pipe is suitable for filtering theultrafine 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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IPC IPC(8): B01D39/20
CPCB01D39/20
Inventor 顾益平吴亚平崔永杰周成许学良
Owner 江苏开创环保科技有限公司