High-temperature and high-pressure granular-bed filter device and filter material regenerating method

Abstract

The invention provides a high-temperature and high-pressure granular-bed filter device and a filter material regenerating method. The device is suitable for filtering dust removal of crude gas with the temperature range of 80 to 1,300DEG and the pressure range of 0.2 to 1.0Mpa and the filter material regenerating method matched with the device for online ash clearing; meanwhile, the invention discloses a pressurized sealing method matched with the filter material regenerating method to guarantee that no high-temperature and high-pressure coal gas leaks when the device feeds (discharges) materials. The high-temperature and high-pressure granular-bed filter device is of a casing structure, wherein a material distributing bin (10), a purified coal gas bin (20) and a crude coal gas bin (30) are sequentially arrayed inside a casing from top to bottom; a feeding pipe (13), a material outlet pipe (33), a purified coal gas outlet (22), a crude coal gas inlet (34), a material distributing rake driving device (17c), a compressed gas inlet (15) and a manhole are arranged outside the casing.

Description

technical field [0001] The invention provides a high-temperature and high-pressure particle layer filter device and a filter material regeneration method, which relate to high-temperature and high-pressure coal gas and flue gas filtration and dust removal equipment in the industrial fields of coal chemical industry, IGCC, PFBC, boilers, etc. Filter media regeneration method for dust removal. Background technique [0002] At present, the requirements of modern coal chemical industry, IGCC, PFBC and other processes for the filtration of high-temperature and high-pressure crude gas are becoming more and more extensive and demanding, and the demand for energy saving in the production process is getting higher and higher. The traditional gas filtration and dust removal method is used for high-temperature and high-pressure gas There are great limitations and defects in the filtration and dust removal, mainly because: 1. The temperature of crude gas is high, generally the low tempe...

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Problems solved by technology

[0002] At present, the requirements of modern coal chemical industry, IGCC, PFBC and other processes for the filtration of high-temperature and high-pressure crude gas are becoming more and more extensive and demanding, and the demand for energy saving in the production process is getting higher and higher. The traditional gas filtration and dust removal method is used for high-temperature and high-pressure gas There are great limitations and defects in the filtration and dust removal, mainly because: 1. The temperature of crude gas is high, generally the low temperature pyrolysis gas of coal chemical industry is 400~600℃, and the temperature of IGCC and PFBC is 860~1300℃; 2. The crude gas contains It is easy to condense and bond macromolecular aromatic substances, and it is easy to cause filter blockage when the gas filtration temperature is lowered; 3. The corrosive gases in the crude gas, such as hydrogen sulfide and ammonia, have a high content, and even contain alkali metals and heavy metal vapors. The equipment is seriously corroded; 4. The sensible heat loss of low-temperature filtered gas is large, which reduces the thermal efficiency of the process, etc.

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