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High-temperature gas-solid ceramic filter tube and preparation method

A ceramic filter tube, high temperature gas technology, applied in filtration and separation, separation methods, chemical instruments and methods, etc., can solve the problems of reduced effective surface area of ​​pore formation, large filtration resistance, low microporosity, etc., to solve the problem of bonding strength. Contradictory with filtration flux and resistance drop, smooth flow channel, high mechanical strength and rigidity

Inactive Publication Date: 2013-03-13
宜兴市鑫帝豪高科陶瓷厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Relatively large bone particles have a relatively large surface area on the filter tube, resulting in a decrease in the effective surface area occupied by pores, which is usually only about 20% in tests, and the relatively low microporosity is another reason for the high filtration resistance

Method used

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  • High-temperature gas-solid ceramic filter tube and preparation method
  • High-temperature gas-solid ceramic filter tube and preparation method
  • High-temperature gas-solid ceramic filter tube and preparation method

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Effect test

Embodiment

[0034] Embodiment: The preparation method is the same as the usual method for preparing porous filter tubes. Firstly, the support tube body is prepared, sintered, and then coated by dipping or spraying, and sintered again.

[0035]Support body preparation: according to the table of examples, weighing ingredients→mixing mud (to make plastic mud)→extrusion molding→drying→firing (1350-1400°C, heat preservation for 4-6 hours), to obtain an average pore size of 30- 40 micron silicon carbide porous support tube. Among them, the average particle size of silicon carbide particles is 200-250 μm, the particle size of walnut shell particles is 260-400 mesh, the binder mineral material is ≤300 mesh, and the polyvinyl alcohol is 1:9 water glue.

[0036] Preparation of ceramic microporous coating: according to the table of examples, weighing ingredients → mixing ball milling (to obtain a stable and uniformly dispersed suspension) → spraying or dipping (coating thickness 20-25 microns) → dry...

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Abstract

The invention provides improvement of ceramic filter tubes for high-temperature gas purification, and is characterized in that a high-temperature binder for sintering comprises two or more than two of magnesium oxide, strontium oxide, calcium oxide, potassium oxide-containing minerals, kaolin or clay, and trace rare earth, and mainly forms a liquid-phase silicate high-temperature binder above 1200 DEG C. The contradiction between binding strength of a filter tube support body and filtration flux and resistance drop is well coordinated and solved; the obtained filter tube support body not only meets the requirements for transport, installation, and using strength, but also has a high filtration flux and low filtration resistance. When the filter tube has rupture strength of not less than 26 MPa, and a filtration flux of 55 m3 / hm2, the resistance drop is 850-950 Pa or lower; the consistency for finished product batch production is good; and the performance difference is less than 10%.

Description

technical field [0001] The invention is an improvement on the ceramic filter tube for purifying high-temperature gas, and in particular relates to a ceramic filter tube for high-temperature gas-solid separation with good strength, high flux and low resistance and a preparation method. Background technique [0002] Integrated gasification combined cycle power generation technology (IGCC) is favored because of its high heat utilization rate and almost zero smoke and dust emissions, as described in Chinese patent CN101880553A. Among them, the ceramic filter tube for high-temperature gas-solid separation for coal combustion hot air cleaning is the key and important core component. In this process, the ceramic filter tube directly filters and purifies the high-temperature gas, which requires the filter tube to work at a high temperature of 300-900°C and have a certain mechanical strength such as the design strength P 折 ≥24Mpa, to meet the requirements of transportation, installa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/565C04B35/185C04B35/195C04B35/622B01D39/20
Inventor 顾军顾佳嘉
Owner 宜兴市鑫帝豪高科陶瓷厂
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