Crude fuel gas purification process
A purification process and gas technology, applied in gasification process, combustible gas purification, combustible gas purification/transformation, etc., can solve problems such as low energy conversion efficiency, serious secondary pollution, and unmentioned purification
Pending Publication Date: 2020-02-11
深圳龙澄高科技环保股份有限公司
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Problems solved by technology
However, there are still some unsolvable problems in waste incineration technology: 1) Secondary pollution is serious, and gas pollutants, dioxin, fly ash, slag, etc. produced during the incineration process have always been difficult to deal with; 2) Energy conversion efficiency Low, the average power generation efficiency of waste incineration plants in my country is only 14.6%
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[0011] The following is attached figure 1 The present invention is further described in detail. In the domestic waste pyrolysis gasification process matched with this process, the pyrolysis and gasification links are carried out in two reaction devices respectively, and the tar produced by pyrolysis is greatly decomposed in the high temperature environment (1000~1200°C) of the gasifier , into combustible gas, so the crude gas tar content in this process is extremely low.
[0012] The crude gas is exported from the outlet of the gasifier and first enters the high-temperature cyclone dust collector to remove most of the dust. The temperature of the crude gas after dedusting is about 800°C, and the heat is relatively high. It enters the heat exchanger to preheat the gasification agent, and then enters the inner and outer jackets of the pyrolyzer to heat the pyrolyzer to fully recover the crude gas. of heat. After the heat exchange, the temperature of the crude gas is reduced t...
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The invention discloses a crude fuel gas purification process, which is mainly suitable for carrying out purification and quality upgrading on crude gas generated in a household garbage pyrolysis gasification process, wherein the pollutants in crude fuel gas are sequentially removed, particularly dust removal, tar removal, acid-alkali gas removal and deep dust removal are sequentially performed, and the crude fuel gas purification process mainly comprises: high-temperature cyclone dust removal, heat exchange, venturi cyclone dust removal, treating with a spraying tower, and treating with a bag-type dust removing device; According to the process, most of the dust in crude fuel gas is removed through the high-temperature cyclone dust removing device, and then heat is recovered; the crude fuel gas after heat exchange enters a venturi cyclone dust removing device to remove dust, tar and the like; the crude fuel gas after dust removal and decoking enters the spraying tower to remove HCl, H2S, NH3 and other acid-alkali gases; the bag-type dust removing device as a guarantee link can effectively control the dust concentration in the fuel gas; and the wastewater generated in the process enters a crude fuel gas washing wastewater treatment system, and the generated ash residue is subjected to landfill treatment. According to the invention, after crude fuel gas is treated by the process,the quality is greatly improved, and the subsequent internal combustion power generation requirement can be met; and the process has the advantages of strong pertinence, good effect, low cost and thelike.
Description
technical field [0001] The invention relates to the technical field of gas purification and quality improvement, in particular to a process for purifying crude gas produced during the pyrolysis gasification process of domestic garbage. Background technique [0002] Garbage incineration is the treatment of organic waste through oxidative combustion, and the effect of reduction and harmlessness is remarkable. Under the background of general shortage of urban land, incineration technology has been widely used in our country. However, there are still some unsolvable problems in waste incineration technology: 1) Secondary pollution is serious, and gas pollutants, dioxin, fly ash, slag, etc. produced during the incineration process have always been difficult to deal with; 2) Energy conversion efficiency On the low side, the average power generation efficiency of waste incineration plants in my country is only 14.6%. Pyrolysis and gasification technology is considered to be a clea...
Claims
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Patent Timeline
Login to View More IPC IPC(8): C10J3/84C10K1/00C10K1/02C10K1/08B01D50/00B01D53/18
CPCC10J3/84C10K1/002C10K1/003C10K1/004C10K1/026C10K1/024C10K1/085B01D53/18B01D53/185B01D53/1406B01D53/1493B01D53/1456B01D53/1468C10J2300/0946B01D2252/103B01D2252/10B01D2257/2045B01D2257/406B01D50/10Y02P20/50
Inventor 龚佰勋陈洪一黎莉邓旺明韦彦秀
Owner 深圳龙澄高科技环保股份有限公司