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Alpha aluminum oxide large-size ceramic regenerator and preparing process thereof

An α-alumina, preparation process technology, applied in the field of industrial energy-saving and emission-reduction equipment, can solve the problems of honeycomb ceramics with low wear resistance, low corrosion resistance, low mechanical strength, low heat exchange efficiency, etc., and achieve shape retention. Outstanding performance, good corrosion resistance and high heat exchange 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

AI Technical Summary

Problems solved by technology

[0005] The invention provides a large-scale ceramic regenerator made of α-alumina 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 the 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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  • Alpha aluminum oxide large-size ceramic regenerator and preparing process thereof
  • Alpha aluminum oxide large-size ceramic regenerator and preparing process thereof
  • Alpha aluminum oxide large-size ceramic regenerator and preparing process thereof

Examples

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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: 28 parts of α-alumina, 3 parts of silicon powder, 8 parts of kaolin, 9 parts of silicon nitride, 13 parts of potassium feldspar, 11 parts of cordierite, 3 parts of boron nitride, 2 parts of calcium sulfate whisker (2) Add additives, the additive components are 1 weight part of methyl cellulose, 2 weight parts of cyanoethyl cellulose, 1 weight part of polyvinyl alcohol, 1 weight part of polyethylene oxide, and 2 weight parts of glycerin; (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, continue stirring for 5 minutes after adding water, and add tung oil at one time, ...

Embodiment 2

[0037] The large-scale ceramic regenerator produced has a rectangular 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: 24 parts of α-alumina, 4 parts of silicon powder, 10 parts of kaolin, 10 parts of silicon nitride, 16 parts of potassium feldspar, 14 parts of cordierite, 4 parts of boron nitride, 5 parts of calcium sulfate whisker (2) Add 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 3 times while stirring. After the water is added, continue stirring for 2 minutes and add tung oil tw...

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 screen, the inorganic powder is composed of the following components by weight: 25 parts of α-alumina, 4 parts of silicon powder, 11 parts of kaolin, 11 parts of silicon nitride, 18 parts of potassium feldspar, 15 parts of cordierite, nitride 4 parts of boron, 3 parts of calcium sulfate whiskers; (2) adding additives, the additive components are 1 weight part of methyl cellulose, 3 weight parts of hydroxyethyl cellulose, 1 weight part of polyvinyl alcohol, and 1 weight part of polyethylene oxide , (polyethylene glycol 400) 2 parts by weight; (3) Kneading, add water and lubricating oil while stirring in the kneader, when kneading, after adding 400kg of material, stir for 15min, add half of the water first, continu...

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Abstract

An alpha aluminum oxide large-size ceramic regenerator is characterized in that the regenerator is of a cylinder structure, and multiple pore channels through the cylinder are formed in the regenerator. The regenerator is formed by sintering inorganic powder and an additive, wherein the inorganic powder is prepared from, by weight, 20-30 parts of alpha aluminum oxide, 3-5 parts of silica powder, 7-13 parts of kaolin, 12-20 parts of potassium feldspar, 10-20 parts of cordierite, 8-15 parts of silicon nitride and 2-5 parts of boron nitride. The ceramic regenerator is high in forming performance and shape preserving performance. By adopting the formula and the production method, the pore channels of the regenerator are dense, the wall is only 1 mm thick, the section size is larger than 100 cm<2>, the length-diameter ratio is large, and the length reaches 1000 mm; all the pore channels have the advantages of being small in resistance, small in dust accumulation amount, not prone to blocking and good in dust discharging performance.

Description

technical field [0001] The invention belongs to the field of industrial energy-saving and emission-reduction equipment, and in particular relates to an α-alumina 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 proc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/00C04B35/10C04B35/81C04B35/622F28D20/00
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
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