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A fiber-reinforced ceramic filter element and its preparation method

A ceramic filter element and fiber-reinforced technology, which is applied in the field of fiber-reinforced ceramic filter element and its preparation, can solve the problems of initial filter element pressure drop increase, surface film shedding, filter element failure, etc., achieve uniform pore size, ensure compressive strength, and ensure The effect of filtration efficiency

Active Publication Date: 2016-03-02
SUZHOU BOQING ADVANCED MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the backwash is carried out from the inside to the outside, the dust particles have to go through the long path of the membrane wall to be removed, which requires greater pressure to complete, which will lead to an increase in the initial test pressure drop of the filter element, and until the surface membrane falls off, and eventually lead to filter failure

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] This embodiment is a fiber-reinforced ceramic filter element, which is composed of a support body and a surface film. The surface film is coated on the support body. The support body contains silicon carbide as the main material, and the auxiliary material is bonded. agent and pore-forming agent, the main material of the silicon carbide is finely graded silicon carbide with a particle size of 250-300 μm; the binder contains clay, kaolin and feldspar, and the weight percentage between the three The ratio is clay: 4-8%, kaolin: 4-8%, feldspar: 2-4%; the pore-forming agent is purple wood knot with a content higher than 90%; the raw material used in the surface film It is mullite with a particle size of 50 μm, and the minimum pore size of the support is 40 μm, and the maximum is 50 μm; the minimum thickness of the surface film is 0.2 mm, and the maximum is 0.4 mm. Maximum 5μm;

[0015] A preparation method of a fiber-reinforced ceramic filter element, the method is as foll...

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PUM

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Abstract

The invention discloses a fiber-reinforced ceramic filter element and a preparation method thereof. A fiber-reinforced surface filter membrane is prepared on a porous ceramic support by chemical vapor infiltration (CVI). The fiber-reinforced surface filter membrane and the porous ceramic support are sintered into an integral body; and the finally formed ceramic filter element has the characteristics of low pressure drop and easiness for pulse blowback regeneration in the coal gasification filtration dedusting process.

Description

technical field [0001] The invention relates to the technical field of ceramic material production, in particular to a fiber-reinforced ceramic filter element and a preparation method thereof. Background technique [0002] The mechanism of filtering and purifying high-temperature crude gas by ceramic filter elements used under high temperature and high pressure has been described in many documents. In the high-efficiency and clean utilization of coal, a key problem that needs to be solved is high-temperature filtration and dust removal technology, and high-temperature ceramic filter elements are considered to be the most effective way to solve this problem. However, as the core component of the filter device, the filter element with a filter membrane on the surface often fails. One of the important reasons is that the surface membrane is blocked or peeled off. The core of the present invention is to add a certain amount of ceramic fibers to the surface film of the filter el...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B38/06C04B35/565C04B35/80C04B41/85
Inventor 梁龙施荣生徐国民
Owner SUZHOU BOQING ADVANCED MATERIALS