Mixed-flow type moving bed high-temperature gas filtering and purifying device and method

Abstract

The invention discloses a mixed-flow type moving bed high-temperature gas filtering and purifying device and a method. The device comprises an inner body shell and an outer body shell. A first chamber is formed in the inner body shell, a raw gas inlet is formed in the inner body shell, and the first chamber is communicated with a raw gas conveying pipeline through the raw gas inlet. The inner body shell is sleeved with the outer body shell to form an inner body cavity, the inner body cavity is filled with a filter material layer, the first chamber is communicated with the inner body cavity through the raw gas inlet formed in the inner body shell to form a raw gas even distributing channel, a purified gas outlet is formed in the position, away from the raw gas inlet, of the outer body shell, and the inner body cavity is communicated with a purified gas conveying pipeline through the purified gas outlet to form a purified gas even distributing channel. The device and the method have the advantages that the gas filtering efficiency is high; operating cost is low; the sensible heat loss of hot gas is small; operating is continuous, and the filtering effect is good; during feeding, purified gas is not leaked.

Description

technical field [0001] The invention relates to the technical field of gas purification, in particular to a mixed-flow moving bed high-temperature gas filtration and purification device and method. Background technique [0002] At present, the purification methods of gas at home and abroad are mainly divided into: the purification of fixed bed gas generator gas is a combination of mechanical cyclone centrifugal separation-electric dust collector-indirect cooling below 45°C-electric dust collector-dropper-user method. During the purification process, waste water is produced to pollute the environment. Energy is consumed during the cooling process, and at the same time the sensible heat of the gas is washed away. In order to increase the combustion temperature of the kiln, some users have to reheat the gas, wasting a lot of energy and improving The cost of gas is reduced; the purification procedure of the fluidized bed gas generator is: mechanical cyclone centrifugal separati...

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Problems solved by technology

During the purification process, waste water is produced to pollute the environment. Energy is consumed during the cooling process, and at the same time the sensible heat of the gas is washed away. In order to increase the combustion temperature of the kiln, some users have to reheat the gas, wasting a lot of energy and improving The cost of gas is reduced; the purification procedure of the fluidized bed gas generator is: mechanical cyclone centrifugal separation-water washing of gas at 800°C to 900°C down to 45°C-dropper-user, energy waste is more significant, about 40%, The dust content at the outlet of the fluidized bed gasifier is extremely high, at 20000mg / m 3 Above, the waste water after washing contains a large amount of fine carbon particle dust, which cannot be treated, that is, dust pollution and waste water pollution are produced; there is a method of filtering gas with metal sintered mesh under study, which can only adapt to the temperature below 600 ° C, and Expensive, high running resistance, high operating costs, short life, small range of use, so far no users use it; The quartz sand with a smooth surface is used to absorb and block dust by the gaps between the quartz sand particles. The gas passes through the small holes on the entire plate surface and penetrates the filter material horizontally for filtration. When the filter material absorbs dust to a certain extent, it begins to move down. The particles loosen and tumble, and the fine dust breaks away from the surface of the filter material, and they are all in the impact of the gas flow. The phenomenon of gas re-entrainment is serious, and the purpose of high-temperature gas purification cannot be achieved.

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