Porous alloy filter element used in high-temperature environment and preparation method of porous alloy filter element

A filter element, high temperature environment technology, applied in the field of porous alloy filter element and its preparation, can solve the problems of affecting the service life of materials, high cost of raw materials, small filter area, etc., to achieve good filtering effect, long service life, and increased filter area. big effect

Active Publication Date: 2015-06-03
荣仕国际投资(北京)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these methods can prepare iron-chromium-aluminum porous metal materials, there are problems such as complicated process and high raw material cost; Affect the service life of such materials in high temperature environment
[0005] Aiming at the problems of small filt

Method used

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  • Porous alloy filter element used in high-temperature environment and preparation method of porous alloy filter element

Examples

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Embodiment 1

[0057] Preparation of Fe-Cr-Al-Based Porous Metal Filter Elements for Purification of High-temperature Dusty Gas Used in IGCC Power Generation

[0058] The porous alloy filter element prepared in this embodiment is made of iron-chromium-aluminum-based composite porous alloy material, and is composed as follows by mass percentage:

[0059] 3wt% of aluminum, 15wt% of chromium, 2wt% of silicon carbide, 0.038wt% of lanthanum-cerium mixed rare earth, and the balance is iron;

[0060] The filter element preparation method of the present embodiment comprises the following steps:

[0061] Step 1: Preparation of rare earth-containing iron-silicon carbide sintered block

[0062] According to the mass ratio of silicon carbide and rare earth in the designed iron-chromium-aluminum-based porous metal material, the mass ratio of silicon carbide and rare earth is enlarged by 5 times, and the silicon carbide powder with a particle size below 1um is weighed 10Kg, and the rare earth is 0.19. K...

Embodiment 2

[0076] Preparation of Fe-Cr-Al-based porous metal filter element for direct purification of PM2.5 in high-temperature flue gas

[0077] The porous alloy filter element used in the high-temperature environment prepared in this embodiment is made of iron-chromium-aluminum-based composite porous alloy material, and its composition includes the following components, which are composed by mass percentage:

[0078] Aluminum 5wt%, chromium 20wt%, silicon carbide 8wt%, rare earth yttrium 0.49wt%, the balance is iron;

[0079] The filter element preparation method of the present embodiment comprises the following steps:

[0080] Step 1: Preparation of rare earth-containing iron-silicon carbide sintered block

[0081] According to the mass ratio of silicon carbide and rare earth in the designed iron-chromium-aluminum-based porous metal material, the mass ratio of silicon carbide and rare earth enlarged by 5 times, respectively weigh 40Kg of silicon carbide powder with a particle size o...

Embodiment 3

[0095] Preparation of Fe-Cr-Al-Based Porous Metal Filter Elements for Purification of Aluminum Melts

[0096] The porous alloy filter element used in the high-temperature environment prepared in this embodiment is made of iron-chromium-aluminum-based composite porous alloy material, and its composition includes the following components, which are composed by mass percentage:

[0097] 7wt% of aluminum, 25wt% of chromium, 10wt% of silicon carbide, 0.25wt% of lanthanum-cerium mixed rare earth, and the balance is iron;

[0098] The filter element preparation method of the present embodiment comprises the following steps:

[0099] Step 1: Preparation of rare earth-containing iron-silicon carbide sintered block

[0100] According to the mass ratio of silicon carbide and rare earth in the designed iron-chromium-aluminum-based porous metal material, the mass ratio of silicon carbide and rare earth enlarged by 5 times, respectively weigh 50Kg of silicon carbide powder, 1.25Kg of rare ...

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Abstract

The invention relates to a porous alloy filter element used in a high-temperature environment and a preparation method of the porous alloy filter element. The filter element comprises a plurality of parallel filter channels, wherein one end of each filter channel is closed, the other end of each filter channel is open, closed ends of two adjacent filter channels are opposite, and the filter element is made of an iron chromium aluminum based compound porous alloy material; the diameter of each filter channel ranges from phi 10 mm to phi 100 mm, micropores extending to the surface of the alloy material are distributed in the iron chromium aluminum based compound porous alloy material, and the diameter of each micropore ranges from 500 nm to 40 mu m. The preparation method comprises procedures of preparation of iron chromium aluminum based powder slurry, casting forming, thermal debinding, sintering and the like. The prepared filter element has a good filtering function on high-temperature dusty gas or high-temperature particle-contained fluids, has the advantages of excellent high-temperature strength, large filtering area, long service life in the high-temperature environment, reusability and the like and is suitable for industrial application.

Description

technical field [0001] The invention relates to a porous alloy filter element used in a high-temperature environment and a preparation method thereof, belonging to the technical field of preparation of porous metal materials. Background technique [0002] Traditional flue gas treatment methods including cyclone dust collection, electric dust collection, bag dust collection and wet room temperature purification are difficult to directly filter high-temperature flue gas; in order to solve the problems in existing high-temperature dust collection, patent CN101934177B proposes The use of granular beds for the purification of high-temperature flue gas, but this patented technology is still difficult to capture the fine particle dust in the flue gas and other defects; porous ceramics can realize the direct purification of high-temperature flue gas, but its poor thermal shock resistance and other defects, Seriously affected the service life of the filtration system; although the pa...

Claims

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Application Information

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IPC IPC(8): B01D39/20C22C38/18B22F3/22B22F3/11
Inventor 周向阳张志敏周向清
Owner 荣仕国际投资(北京)有限公司
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