Downdraft gasifier capable of realizing efficient self purification of tar

A gasifier and self-purification technology, applied in the field of coal or biomass gasification, can solve the problems that cannot meet the requirements of gas turbines

Inactive Publication Date: 2013-11-20
黄必录
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Problems solved by technology

The order of magnitude of the content of combustible gas tar in various gasifiers is: 100g / m for updraft gasifiers 3 ; Fluidized bed gasifier 10g / m 3 ;The tar in the downdraft gasifier passes through the oxidation and reduction zone, most of which are burned and cracked, and the tar content of the combustible gas is the lowest, which is 1g / m 3 , but still cannot meet the requirements of gas turbine

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  • Downdraft gasifier capable of realizing efficient self purification of tar

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Embodiment Construction

[0006] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0007] see figure 1 , a downdraft gasifier capable of efficiently self-purifying tar, comprising a coke oven 1 and a downdraft gasifier 2, etc., characterized in that the coke oven 1 is arranged above the downdraft gasifier 2, so that the generated coke can fall onto the downdraft gasifier 2; a liner 3 is set in the coke oven 1, so that an interlayer 10 is formed between the furnace wall 4 and the inner liner 3, and high-temperature combustible gas flows through the interlayer 10 , so that the heat in the combustible gas can heat the material in the coke oven 1 through the conduction and radiation of the inner tank 3; the coke oven 1 is also provided with a coke oven gas conduit 9 and an air extractor 5 connected thereto, so that the coke oven 1 can be heated by The coke oven gas produced by the coke oven 1 can be continuously pumped away, so...

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Abstract

The invention relates to the field of gasification of coal or biomass, and in particular relates to a downdraft gasifier capable of realizing efficient self purification of tar. The downdraft gasifier comprises a coke oven, a gasifier and the like. The working principle is that the coke oven decomposes materials (coal or biomass fuel) into coke-oven gas and coke, then the coke-oven gas is mixed with a gasifying agent (air, enriched oxygen or pure oxygen) to be combusted so as to thoroughly remove tar, and the coke-oven gas and air subjected to combustion are converted into combustible gas by the downdraft gasifier. The downdraft gasifier can be used for gas supply of power plants, industry and residents, and a small downdraft gasifier can be used for gas supply of families.

Description

technical field [0001] The invention relates to the field of coal or biomass gasification, in particular to a downdraft gasifier capable of efficiently self-purifying tar. Background technique [0002] The integrated gasification hot air cycle (IGHAT) power generation method has the lowest investment in plant construction, and the energy conversion efficiency is as high as 60%. However, IGHAT has not been commercialized for a long time. The main obstacle is that the combustible gas contains high tar and fly ash, because gas turbines require that the tar content in the combustible gas not exceed 0.02-0.05g / m 3 . A device that converts materials (coal or biomass fuel) into combustible gas is called a gasifier. Currently known gasifiers include updraft gasifiers, fluidized bed gasifiers, and downdraft gasifiers. The order of magnitude of the content of combustible gas tar in various gasifiers is: 100g / m for updraft gasifiers 3 ; Fluidized bed gasifier 10g / m 3 ;The tar in t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10J3/20C10J3/66
Inventor 黄必录
Owner 黄必录
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