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High-strength metal filtering tube and preparation method thereof

A filter tube, high-strength technology, applied in the direction of filtration separation, separation method, gravity filter, etc., can solve the problems of broken filter element failure, filter failure, and the preparation method of high-strength metal filter tube has not yet been found, to achieve good permeability, Improve strength, high strength effect

Active Publication Date: 2012-07-04
AT&M ENVIRONMENTAL ENG TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During use, because the filter element vibrates under the action of high-pressure pulse blowback gas in a high-temperature environment, it is easy to cause the filter element to break and fail at the welding seam, and eventually cause the entire filter to fail, affecting the smooth production
[0005] With the advancement of science and technology and the promotion of new technologies for energy conservation and environmental protection, more and more high-temperature and high-pressure working environments will need to use fluid filtration and purification equipment in the future. At present, no high-strength metal filter tubes that can be used for special working conditions have been found. method report

Method used

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  • High-strength metal filtering tube and preparation method thereof
  • High-strength metal filtering tube and preparation method thereof
  • High-strength metal filtering tube and preparation method thereof

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preparation example Construction

[0027] The high-strength metal filter tube provided by the present invention and preparation method thereof, its processing steps are as follows:

[0028] Step 1: Put the uniformly mixed powder into the mold of the cold isostatic pressure tube for molding. The molding pressure is 150-250MPa. The material of the metal powder can be stainless steel series (SS316L, SS304, etc.), high-temperature alloy series according to the working conditions. (Hastelloy (Hastelloy), Inconel (Inconel alloy), etc.) or other metal materials, the particle size of the powder used can be determined according to the permeability, pore target, filtration flow capacity, etc. of the filter tube to be manufactured.

[0029] The second step: put the powder tube green body prepared in the second step into the vacuum sintering furnace, and sinter at 800-1300°C, with a vacuum degree of 10 -1 ~10 -3 Pa, the holding time is 1 to 3 hours, and the powder tube obtained by sintering has a filter structure that mee...

Embodiment

[0037] The method of the invention is used to prepare a high-strength structural metal filter tube. The comparison of the embodiments of the present invention is shown in the table below. Table 1 is the stainless steel 316L raw material composition that the embodiment of the present invention adopts; Table 2 is the technological system and parameter of the metal filter tube of high-strength structure prepared by the present invention; Table 3 is the performance comparison of the metal filter tube of high-strength structure prepared by the present invention surface. In the above list, serial numbers 1-2 are embodiments of the present invention, and serial number 3 is a comparative example of the prior art.

[0038] As can be seen from Table 3, the tensile strength and flexural strength of the metal filter tube based on the present invention have been significantly improved, and the metal filter tube prepared by the present invention can greatly improve the resistance of the fi...

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Abstract

The invention relates to a high-strength metal filtering tube and a preparation method of the filtering tube. The high-strength metal filtering tube comprises an inner tube at the internal layer, and an outer tube that is outside and parallel to the inner tube with a certain distance, wherein the inner tube is a perforated tube or a helical tube, and the outer tube is a sintered powder tube with a millipore filtration structure and used for filtering. Compared with the prior art, the metal filtering tube prepared by the invention has substantially increased the bending resistance, and improved the stability and reliability in use. The high-strength metal filtering tube prepared by this invention is mainly used in filtration equipment in a high-temperature and high-pressure (HTHP) working condition, like HTHP pulverized coal transport system and fly ash collecting and disposing system of a coal gasification device.

Description

technical field [0001] The invention relates to a metal filter tube and its preparation method in the field of preparation of special functional materials, in particular to a high-strength metal filter tube suitable for high-temperature and high-pressure gas / solid and liquid / solid filtration and separation applications and its preparation method . Background technique [0002] Filters play a huge role in the filtration of high-temperature gas in the petrochemical industry, the purification of high-temperature flue gas, the filtration and recovery of catalysts, and the purification process of dust and tail gas in thermal power generation and nuclear power generation industries. [0003] In the petrochemical and coal chemical industries, filters are especially used under severe conditions such as high temperature and high pressure. For example, the Shell coal gasification technology device uses a large number of sintered filters in the pulverized coal conveying system and the...

Claims

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Application Information

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IPC IPC(8): B01D46/24B01D29/31B01D29/50
Inventor 王凡王浩安永涛陈利军谭华玉郭辉进杨军军韩振武
Owner AT&M ENVIRONMENTAL ENG TECH CO LTD
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