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Silicon carbide large-size ceramic heat accumulator and preparing process thereof

A preparation process and heat storage body technology, which is applied in the fields of emission reduction equipment and industrial energy saving, can solve the problems of honeycomb ceramics, such as low wear resistance, low corrosion resistance, low mechanical strength, low heat exchange efficiency, etc. Exchange efficiency, good corrosion resistance, high heat transfer efficiency

Inactive Publication Date: 2016-11-09
北京神雾电力科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention provides a silicon carbide large-scale ceramic regenerator and its preparation process, which are used to solve the problem of poor wear resistance and corrosion resistance, irregular shape, small size, short length and large aperture of existing honeycomb ceramics. Wall thickness, easy to block the flue during use, large waste of heat energy, low heat exchange efficiency, low mechanical strength, short life and other technical problems

Method used

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  • Silicon carbide large-size ceramic heat accumulator and preparing process thereof
  • Silicon carbide large-size ceramic heat accumulator and preparing process thereof
  • Silicon carbide large-size ceramic heat accumulator and preparing process thereof

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Effect test

Embodiment 1

[0034]The large-scale ceramic regenerator produced has a square cross-section; its preparation process is: (1) dry mixing, firstly add the inorganic powder into the ball mill, dry mix for 4 hours, pass through a 100-mesh sieve, and the inorganic powder is made of the following weight Proportioned components: 61 parts by weight of silicon carbide, 11 parts by weight of silicon powder, 6 parts by weight of silicon nitride, 3 parts by weight of alumina micropowder, 3 parts by weight of silicon dioxide, 1.5 parts by weight of calcium oxide, and 1.0 parts by weight of boron nitride. parts by weight; (2) adding additives, the additive components are 4 parts by weight of hydroxyethyl cellulose, 1 part by weight of polyvinyl alcohol, 1 part by weight of polyethylene oxide, and 2 parts by weight of (polyethylene glycol 400); (3) kneading , add water and lubricating oil while stirring in the kneader. When kneading, after adding 400kg of material, add water in 5 times while stirring. Afte...

Embodiment 2

[0037] The large-scale ceramic regenerator produced has a square cross-section; its preparation process is: (1) dry mixing, firstly add the inorganic powder into the ball mill, dry mix for 6 hours, pass through the 80-mesh sieve, and the inorganic powder is made of the following weight Proportioned components: 65 parts by weight of silicon carbide, 18 parts by weight of silicon powder, 7 parts by weight of silicon nitride, 4 parts by weight of alumina micropowder, 4 parts by weight of silicon dioxide, 2 parts by weight of calcium oxide, 1.5 parts by weight of boron nitride Parts by weight; (2) Add additives, the additive components are 1 part by weight of methyl cellulose, 1 part by weight of hydroxyethyl cellulose, 3 parts by weight of cyanoethyl cellulose, 1 part by weight of polyvinyl alcohol, and 1 part by weight of polyethylene oxide 2 parts by weight of polypropylene glycol; (3) kneading, add water and lubricating oil while stirring in the kneader, when kneading, after ad...

Embodiment 3

[0040] The large-scale ceramic regenerator produced has a rectangular cross-section; its preparation process is: (1) dry mixing, first add inorganic powder into the ball mill, add the required powder into the ball mill, dry mix for 3 hours, and pass through 80 mesh The sieve, the inorganic powder is composed of the following components by weight: 65 parts by weight of silicon carbide, 20 parts by weight of silicon powder, 8 parts by weight of silicon nitride, 6 parts by weight of alumina micropowder, 4 parts by weight of silicon dioxide, 2 parts by weight of calcium, 2 parts by weight of boron nitride; (2) adding additives, the additive components are 2 parts by weight of methyl cellulose, 3 parts by weight of cyanoethyl cellulose, 1 part by weight of polyvinyl alcohol, and 1 part by weight of polyethylene oxide 3 parts by weight of butanediol; (3) Kneading, add water and lubricating oil while stirring in the kneader, when kneading, after adding 400kg of material, stir for 15 m...

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Abstract

A silicon carbide large-size ceramic heat accumulator is characterized in that the heat accumulator is of a cylinder structure, multiple pore channels through the cylinder are formed in the heat accumulator, and the heat accumulator is formed by sintering inorganic powder and an additive. The inorganic powder is prepared from, by weight, 60-70 parts of silicon carbide, 10-30 parts of silica powder, 5-10 parts of silicon nitride, 2-8 parts of alumina micro powder, 2-5 parts of silicon dioxide, 1.0-2.5 parts of calcium oxide and 1.0-2.5 parts of boron nitride. The inorganic powder is high in forming and shape preserving performance. By adopting the formula and the production method, the pore channels of the heat accumulator are dense, the wall thickness is small and is only 1mm, the section size is large and is larger than 100 cm<2>, the length-diameter ratio is large, the length reaches 1000 mm, and all the pore channels have the advantages of being small in resistance, small in dust deposition amount, not prone to blockage and good in dust discharge performance.

Description

technical field [0001] The invention belongs to the field of industrial energy-saving and emission-reduction equipment, and in particular relates to a silicon carbide large-scale ceramic regenerator and a preparation process thereof. Background technique [0002] Regenerative combustion technology has been widely used in industrial furnaces, and one of its technical cores is high-temperature heat storage honeycomb body. Regenerative honeycomb ceramics have replaced traditional regenerative balls and checker bricks due to their good heat storage and release performance, high temperature performance and thermal shock resistance. When in use, the high-temperature flue gas and low-temperature gas (such as air gas) pass through the regenerator alternately in opposite directions by reversing the direction, so that the regenerator continuously absorbs heat and releases heat, and acts as a heat exchange medium to achieve flue gas and air gas. purpose of heat exchange. The specific...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/00C04B35/565C04B35/622F28D20/00
CPCF23D14/66F28D20/00F28D20/0056C04B33/13C04B35/10C04B35/14C04B35/185C04B35/19C04B35/443C04B35/478C04B35/48C04B35/5611C04B35/565C04B35/622C04B35/64C04B35/65C04B35/66C04B38/00C04B38/0009C04B38/0058C04B2235/3208C04B2235/3205C04B2235/32C04B2235/3201C04B2235/3224C04B2235/3215C04B2235/3217C04B2235/3463C04B2235/3472C04B2235/3427C04B2235/3418C04B2235/349C04B2235/36C04B2235/3481C04B2235/3284C04B2235/425C04B2235/404C04B2235/405C04B2235/448C04B2235/428C04B2235/386C04B2235/3843C04B2235/3847C04B2235/3826C04B2235/3873C04B2235/3244C04B2235/3229C04B2235/3251C04B2235/6567C04B2235/658C04B2235/6562C04B2235/656C04B2235/606C04B2235/5276C04B2235/5454C04B2235/5204C04B2235/5248C04B2235/5236C04B2235/5216C04B2235/9607C04B2235/95C04B2235/96C04B2235/9692C04B2235/9669F28D2020/0017Y02E20/34Y02E60/14
Inventor 吴道君周守洪李军营姜朝兴杨晓波
Owner 北京神雾电力科技有限公司