High-temperature-resistant and H2S-corrosion-resistant sintered metal filtering element and application

A technology of sintered metal and filter elements, which is applied in the field of sintered metal materials, can solve the problems of poor corrosion resistance, poor thermal shock resistance and pressure fluctuation resistance, and poor high temperature oxidation resistance of iron-three-aluminum filter elements. The effect of running intensity and difficulty, low production cost and improving quality

Pending Publication Date: 2021-12-07
石家庄波特无机膜分离设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of silicon carbide ceramic filter elements is that the pore-forming mechanism leads to poor back-blowing regeneration effect, fast filter capacity attenuation, and short life; the inherent hard and brittle nature of silicon carbide ceramic materials makes silicon carbide ceramic filter elements resistant to thermal shock and pressure under high temperature conditions Poor fluctuating ability and easy cracking of the tube, resulting in frequent replacement of broken silicon carbide ceramic filter elements during production and use, resulting in discontinuous production and increased production costs
Iron three aluminum filter elements have poor corrosion resistance, poor vulcanization resistance, poor high temperature oxidation resistance, and cannot be used for dust removal and purification of corrosive gases

Method used

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  • High-temperature-resistant and H2S-corrosion-resistant sintered metal filtering element and application
  • High-temperature-resistant and H2S-corrosion-resistant sintered metal filtering element and application
  • High-temperature-resistant and H2S-corrosion-resistant sintered metal filtering element and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The preparation of embodiment 1 sheet filter element

[0037] Table 1 The chemical composition table (by mass percentage) of the raw material sintered metal used in the embodiment of the present invention

[0038]

[0039]

[0040] Note: " / " means no item.

[0041] The first step is to prepare a sheet-like support:

[0042] In the above experimental examples 1 to 10, the Ni powders are all irregular and amorphous, and the particle size of the raw material powder is 80-150 mesh. Listed in Table 1, the raw materials of Experimental Examples 1 to 10 were mechanically mixed respectively. After uniform mechanical mixing, the powders of Experimental Examples 1 to 10 were granulated, and then dried. The drying temperature was set at 85° C. and the drying time was set at 4 hours. In test examples 1 to 10, potato starch was used as a granulating agent during granulation, and the amount of potato starch added was 15% of the total mass of the mixed powder. Afterwards, th...

Embodiment 2

[0053] The preparation of embodiment 2 tubular filter element

[0054] Table 3 The chemical composition table (by mass percentage) of the raw material sintered metal used in the embodiment of the present invention

[0055]

[0056] Note: " / " means no item.

[0057] The first step is to prepare the tubular support:

[0058] In the above experimental examples 1 to 10, the Ni powders are all irregular and amorphous. Listed in Table 1, the raw materials of Experimental Examples 1 to 10 were mechanically mixed respectively. After uniform mechanical mixing, the powders of Experimental Examples 1 to 10 were granulated, and then dried. The drying temperature was set at 85° C. and the drying time was set at 4 hours. In test examples 1 to 10, potato starch was used as a granulating agent during granulation, and the amount of potato starch added was 15% of the total mass of the mixed powder. After that, the powders of Experimental Examples 1 to 10 were respectively packed into col...

Embodiment 3

[0069] Embodiment 3: The filter element prepared in embodiment 1 is used to purify sulfur-containing gas.

[0070] The high temperature and H2S corrosion resistant sintered metal filter element prepared in Example 1 was made into a filter. After the high-temperature sulfur-containing gas passes through the cyclone dust collector, the temperature is 310°C, the SO2 content is 1.7%, and the dust content is 18g / m3. Enter the filter, control the filter pressure difference to 2KPa, the gas temperature obtained after solid-gas separation is 310°C, the SO2 content is 1.6%, and the dust content is 0.03g / m3. After the purified gas is absorbed by sulfuric acid with a concentration of 93%, the color of sulfuric acid is clear.

[0071] After the above filter element has been used for 24 hours, use compressed air to back-flush and clean the high-temperature and H2S-resistant sintered metal filter element. And the filtration accuracy has not been significantly reduced.

[0072] As a compa...

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Abstract

The invention provides a high-temperature-resistant and H2S-corrosion-resistant sintered metal filtering element and application, and belongs to the technical field of sintered metal materials. The filtering element comprises a porous supporting body, wherein the porous supporting body is tubular or sheet-shaped; the preparation method comprises the following steps: preparing a powder mixture from the following components in percentage by mass: 17%-30% of Cr, 18%-32% of Co, 2%-2.5% of Fe, 2.5%-3.1% of Si, 0.25%-1.2% of W, 0.25%-1.3% of Mo, 0.25%-1.1% of Nb, 0.15%-0.45% of Al, 0.35%-0.55% of Ti, 0.35%-0.55% of Mn, 0.02%-0.06% of C and the balance of Ni, granulating, drying and forming after preparing the powder mixture, and finally sintering the porous support. According to the high-temperature-resistant and H2S-corrosion-resistant sintered metal filtering element, the pore structure is controlled by adjusting various process parameters such as raw material components, forming pressure and sintering temperature, the regulation and control range of the pore structure is large, and the high-temperature-resistant oxidation / vulcanization-resistant performance is good.

Description

technical field [0001] The invention relates to the technical field of sintered metal materials, and more specifically relates to a high-temperature-resistant and H2S-resistant sintered metal filter element and its application. Background technique [0002] High-temperature gas 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 industrial processes high-temperature gas produced in the Industrial high-temperature gas not only has a large amount of physical heat and chemical latent heat (temperature between 150°C and 1400°C), but also contains dust, a large amount of corrosive substances and dangerous substances (such as CO, H2, CH4, etc.). [0003] With the development of industrial technology and the continuous improvement of ...

Claims

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Application Information

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IPC IPC(8): B01D46/00C22C19/05C22C30/00C22C1/08B22F3/11B22F5/12C23C24/08
CPCB01D46/0001C22C19/056C22C19/055C22C30/00B22F3/11B22F3/1017B22F5/106C23C24/08
Inventor 张志军张志超
Owner 石家庄波特无机膜分离设备有限公司
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