Asymetric membrane FeAl intermetallic compound porosint filter element and application thereof

A technology of intermetallic compounds and filter elements, which is applied in the fields of filtration and separation, chemical instruments and methods, and gas dust removal, can solve the problems of severe corrosion of washing equipment, long purification process, and fast decay of filtration capacity, and achieve good resistance to high temperature oxidation/ Vulcanization performance, expansion of the use environment range, and the effect of reducing penetration resistance

Active Publication Date: 2009-09-09
CHENGDU INTERMENT TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem with the first method is that the high-temperature gas needs to be cooled first, which requires the use of corresponding gas cooling equipment or water resources, and consumes a lot of energy.
[0018] The disadvantages of the current converter gas dedusting and purification methods are: wet dedusting requires a large amount of water, and causes secondary water pollution, serious corrosion of washing equipment, water in the gas, long purification process, many procedures, large energy consumption, and unsatisfactory purification effect ;Dry electrostatic precipitator has a large investment and is prone to explosion
In the actual use process, it is found that there are problems with cerami

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] The preparation of embodiment 1 filter element

[0051] The Fe powder with an average particle size of 100 μm and the Al powder with an average particle size of 90 μm are mechanically mixed according to the ratio of Fe-30at% Al (that is, the number of Fe atoms is 70% of the total number of atoms), and then they are molded at 240 MPa by ordinary molding. Press the sheet blank (￠350×4.0mm) under the pressure. Sintering is carried out in a vacuum atmosphere, and the vacuum degree is controlled at 1.0×10 -1 ~1.0×10 -2 Pa. First, sinter at 130°C for 45 minutes to remove the adsorbed moisture. Subsequently, medium-temperature solid phase diffusion was carried out at a temperature of 520° C. for 60 minutes. The final high-temperature component homogenization and structural stabilization treatment temperature is 1050°C, time is 120 minutes, cooling, and a FeAl intermetallic compound porous support with a maximum pore size of 35 μm and a porosity of 43% is obtained.

[0052...

Embodiment 2

[0055] The preparation of embodiment 2 filter element

[0056] Fe powder with an average particle size of 5 μm and Al powder with an average particle size of 10 μm are mechanically mixed according to the proportion of Fe-60at% Al, and then pressed into a sheet-shaped blank (￠300×3.5 mm). Sintering is carried out in a vacuum atmosphere, and the vacuum degree is controlled at 1.0×10 -1 ~1.0×10 -2 Pa. First, heat at 150°C for 50 minutes; then, carry out medium-temperature solid phase diffusion at 560°C for 120 minutes. The final high-temperature component homogenization and tissue structure stabilization treatment temperature is 1100° C., and the time is 30 minutes. A FeAl intermetallic compound porous support with a maximum pore size of 12 μm and a porosity of 38% was prepared.

[0057] Fe and Al powders with an average particle size of 1.0 μm were mixed in the proportion of Fe-60at% Al to obtain a powder mixture; ethylene glycol and polyvinyl alcohol were mixed in a mass r...

Embodiment 3

[0060] The preparation of embodiment 3 filter element

[0061]Fe powder with an average particle size of 40 μm and Al powder with an average particle size of 30 μm are mechanically mixed in the proportion of Fe-40at% Al, and then pressed under a pressure of 180 MPa by cold isostatic pressing, and the taper of the pressed core rod is 1.8 °, after manual demoulding, a tubular shaped blank (Φ50*300mm) with a slightly tapered inner diameter (3°) is obtained. Sintering is carried out in a vacuum atmosphere, and the vacuum degree is controlled at 1.0×10 -1 ~1.0×10 -2 Pa. First, heat at 120°C for 30 minutes to remove the adsorbed water; then, carry out medium-temperature solid-phase diffusion at 600°C for 120 minutes. The final temperature of the high-temperature component homogenization and structural stabilization treatment is 1200° C. for 90 minutes, and the FeAl intermetallic compound porous support is prepared.

[0062] Fe and Al powders with an average particle size of 1.5 ...

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Abstract

The invention belongs to the field of inorganic porosint and particularly relates to an asymetric membrane FeAl intermetallic compound porosint filter element and the application thereof. The filter element of the invention consists of a multiaperture support body and complex film; wherein, the multiaperture support body is in tubular shape or platy shape, the complex film is made in the following steps: a compound sizing agent is coated on outer surface of a single side of the multiaperture support body; and degreasing, bias diffusion, reaction synthesis and sintering are carried out to form thin-layer complex film with millipores. The millipores on the surface of the filter element is small and uniform, porosity is high, no dust is blocked inside filter material, filtering gas circuit is smooth, and resistance is small; in addition, the element has good resistance to high temperature oxidation/ vulcanization and good normal temperature and high temperature mechanical properties. The element can directly carry out solid-gas separation on industrial gasses, bear top load and high-pressure and high-speed back washing, thus saving relative cooling devices, saving a large amount of water resources, avoiding cooling water treatment, lowering energy loss, shortening process flow and improving work efficiency.

Description

technical field [0001] The invention belongs to the field of inorganic porous materials, in particular to an asymmetric membrane FeAl intermetallic compound porous material filter element and its application. Background technique [0002] High-temperature gas usually refers to industrial gases with a temperature above 250°C, such as metallurgy, steel plant blast furnace or converter gas waste heat recovery, coal chemical industry, coal-fired boilers, thermal power generation, industrial furnaces, calcination and incineration of sulfur-containing minerals and other industries High temperature gas generated during the process. Industrial high-temperature gas not only has the characteristics of high temperature (generally 150 ° C ~ 1400 ° C) and dust, but also often contains a large amount of corrosive substances and dangerous substances (such as CO, H 2 、CH 4 Wait). Therefore, the high-temperature gas dust removal and purification device must have the characteristics of hig...

Claims

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Application Information

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IPC IPC(8): B01D39/02C21C5/40C21B7/22C10K1/02
CPCY02P10/25
Inventor 高麟贺跃辉徐进辉汪涛
Owner CHENGDU INTERMENT TECH
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