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Dust removal and desulfurization integrated silicon nitride porous ceramic and preparation method thereof

A technology of porous ceramics and silicon nitride, which is applied in the field of porous ceramics and can solve problems such as increasing production costs

Inactive Publication Date: 2021-05-18
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of multi-step operation of desulfurization and dust removal in the prior art and increase of production cost, the present invention provides a silicon nitride porous ceramic with integrated dust removal and desulfurization and its preparation method

Method used

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  • Dust removal and desulfurization integrated silicon nitride porous ceramic and preparation method thereof

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Embodiment 1

[0027] A silicon nitride porous ceramic integrating dust removal and desulfurization. The reaction raw materials are extruded and sintered to obtain porous ceramics. The desulfurization catalyst is loaded on the surface of the porous ceramics by impregnation or spraying. The reaction raw materials are proportioned in parts by mass It consists of 100 parts of rice husk, 10 parts of silicon nitride, 14 parts of sintering aid, 1 part of pore-forming agent and 6 parts of low-temperature glass fusion powder, wherein the rice husk is soaked in dilute hydrochloric acid with a volume fraction of 8% for 20 days. It was obtained by boiling in dilute hydrochloric acid with a volume fraction of 8% for 10 minutes, cooling to room temperature, boiling again, repeating 3 times, and then drying.

[0028] Specifically, the desulfurization catalyst is quicklime.

[0029] Specifically, the sintering aid is alumina.

[0030] Specifically, the pore former is graphite.

[0031] Specifically, the ...

Embodiment 2

[0043] A silicon nitride porous ceramic integrating dust removal and desulfurization. The reaction raw materials are extruded and sintered to obtain porous ceramics. The desulfurization catalyst is loaded on the surface of the porous ceramics by impregnation or spraying. The reaction raw materials are proportioned in parts by mass It consists of 100 parts of rice husk, 20 parts of silicon nitride, 20 parts of sintering aid, 10 parts of pore-forming agent and 10 parts of low-temperature glass fusion powder, wherein the rice husk is soaked in dilute hydrochloric acid with a volume fraction of 12% for 50 days. It was obtained by boiling in dilute hydrochloric acid with a volume fraction of 12% for 30 minutes, cooling to room temperature, boiling again, repeating 5 times, and then drying.

[0044] Specifically, the desulfurization catalyst is limestone.

[0045] Specifically, the sintering aid is yttrium oxide.

[0046] Specifically, the pore former is graphite.

[0047] Specifi...

Embodiment 3

[0059] A silicon nitride porous ceramic integrating dust removal and desulfurization. The reaction raw materials are extruded and sintered to obtain porous ceramics. The desulfurization catalyst is loaded on the surface of the porous ceramics by impregnation or spraying. The reaction raw materials are proportioned in parts by mass It consists of 100 parts of rice husk, 15 parts of silicon nitride, 16 parts of sintering aid, 5 parts of pore-forming agent and 8 parts of low-temperature glass fusion powder, wherein the rice husk is soaked in dilute hydrochloric acid with a volume fraction of 10% for 30 days. It was obtained by boiling in dilute hydrochloric acid with a volume fraction of 10% for 20 minutes, cooling to room temperature, boiling again, repeating 4 times, and then drying.

[0060] Specifically, the desulfurization catalyst is quicklime.

[0061] Specifically, the sintering aid is yttrium oxide.

[0062] Specifically, the pore former is graphite.

[0063] Specifica...

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Abstract

In order to solve the problem that the production cost is increased due to multi-step operation of desulfurization and dust removal in the prior art, the invention provides a dust removal and desulfurization integrated silicon nitride porous ceramic and a preparation method thereof. A desulfurization catalyst is loaded on the surface of porous ceramic in a dipping or spraying mode; the reaction raw materials comprise, by mass, 100 parts of rice husks, 10-20 parts of silicon nitride, 14-20 parts of a sintering aid, 1-10 parts of a pore forming agent and 6-10 parts of low-temperature molten glass powder; wherein the rice husks are soaked in diluted hydrochloric acid with the volume fraction of 8-12% for 20-50 days, and are boiled in diluted hydrochloric acid with the volume fraction of 8-12% for 10-30 minutes, then are cooled to room temperature and boiled again, and the steps are repeated for 3-5 times and finally the rice husks are dried.

Description

technical field [0001] The invention belongs to the field of porous ceramics, and in particular relates to a silicon nitride porous ceramic with integrated dust removal and desulfurization and a preparation method thereof. Background technique [0002] With the development and progress of science and technology, factory gas mixed with a large number of dust particles is discharged into the atmosphere, and the air quality is seriously degraded, which has a great impact on people's daily life. According to statistics, my country's industrial coal consumption is about 200 million tons per year, and the flue gas emitted is about 100 million tons. The high-temperature gas must be mixed with dust during the discharge process, which will not only pollute the environment, but also prevent a large number of heat sources from being obtained. Effective use creates waste. The currently widely used dust removal and desulfurization method is a multi-step operation of passing the dust thro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/584C04B38/06C04B35/64C04B41/85
CPCC04B35/584C04B35/64C04B38/067C04B38/0675C04B38/068C04B41/009C04B41/501C04B41/5072C04B41/85C04B2235/3217C04B2235/3225C04B2235/36C04B2235/6562C04B2235/6565C04B2235/6567C04B41/4543C04B41/4539
Inventor 杜建周艾多梅耿翊波张雨宋继明王路明
Owner YANCHENG INST OF TECH
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