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Pyrolysis gasification and purification method of household garbage

A technology of pyrolysis gasification and domestic waste, applied in chemical instruments and methods, chemical industry, biofuels, etc., can solve problems that hinder the rational use of combustible gases, secondary pollution, etc.

Inactive Publication Date: 2013-08-14
SHENZHEN JUNENG BIOMASS GASIFICATION TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A large amount of tar will be produced during the processing. Tar is a mixture of aromatic hydrocarbons such as benzene, phenol, naphthalene, etc. No matter what kind of process, the generation and existence of tar does greatly hinder the further development of flammable gases produced by gasification. Reasonable utilization, and the thermal efficiency of direct incineration of domestic waste for power generation is only about 20%, and it produces secondary pollution and emits a large amount of greenhouse gases

Method used

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  • Pyrolysis gasification and purification method of household garbage

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Embodiment 1

[0045] A domestic waste pyrolysis gasification purification technology, comprising the following steps:

[0046] (1) Pyrolysis: Continuously put domestic waste containing about 10~30% water into the pyrolysis gasifier at a rate of 5 tons per hour (Chinese Patent No. ZL200610035185.5), under the condition of temperature 900°C and normal pressure , with 334Nm from the air separation unit 3 / h Oxygen undergoes combustion and cracking reactions, producing carbon monoxide (CO), carbon dioxide (CO 2 ), hydrogen (H 2 ), methane gas (CH 4 ), nitrogen (N 2 ) and inert gas argon (Ar) and a small amount of acidic impurities HCN, HCL, HF, H 2 S, COS and other combustible gases (that is, crude synthesis gas or biomass gas), and CO 2 , N 2 , Flue gas and slag of water vapor composition, the combustible gas and slag flow downward together, the flue gas flows upward, and the slag is discharged, the flue gas is cleaned and discharged into the chimney, and then the combustible gas is furt...

Embodiment 2

[0065] A domestic waste pyrolysis gasification purification technology, comprising the following steps:

[0066] (1) Pyrolysis: Continuously put domestic waste containing about 20-30% water into the pyrolysis gasifier at a rate of 25 tons per hour (Chinese Patent No. ZL200610035185.5), under the condition of temperature 1000°C and normal pressure , with 1670Nm from the air separation unit 3 / h Oxygen undergoes combustion and cracking reactions, producing carbon monoxide (CO), carbon dioxide (CO 2 ), hydrogen (H 2 ), methane gas (CH 4 ), nitrogen (N 2 ) and inert gas argon (Ar) and a small amount of acidic impurities HCN, HCL, HF, H 2 S, COS and other combustible gases (that is, crude synthesis gas or biomass gas), and CO 2 , N 2 , Flue gas and slag of water vapor composition, the combustible gas and slag flow downward together, the flue gas flows upward, and the slag is discharged, the flue gas is cleaned and discharged into the chimney, and then the combustible gas is f...

Embodiment 3

[0085] A domestic waste pyrolysis gasification purification technology, comprising the following steps:

[0086] (1) Pyrolysis: Continuously put domestic waste containing about 20-50% water into the pyrolysis gasifier at a rate of 50 tons per hour (Chinese Patent No. ZL200610035185.5), under the condition of temperature 1000°C and normal pressure , with 3340Nm from the air separation unit 3 / h Oxygen undergoes combustion and cracking reactions, producing carbon monoxide (CO), carbon dioxide (CO 2 ), hydrogen (H 2 ), methane (CH 4 ), nitrogen (N 2 ) and inert gas argon (Ar) and a small amount of acidic impurities HCN, HCL, HF, H 2 S, COS and other combustible gases (that is, crude synthesis gas or biomass gas), and CO 2 , N 2 , Flue gas and slag of water vapor composition, the combustible gas and slag flow downward together, the flue gas flows upward, and the slag is discharged, the flue gas is cleaned and discharged into the chimney, and then the combustible gas is furth...

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Abstract

The invention relates to a household garbage treatment method. According to the household garbage treatment method, the household garbage is subjected to thermal cracking to form mixed combustible gases containing carbon monoxide (CO), carbon dioxide (CO2), hydrogen (H2), methane (CH4), nitrogen (N2) and inert argon (Ar) by a full gasification process; and the mixed combustible gas flow is purified and separated and then are used for synthesizing methanol and / or dimethyl ether, generating electricity and synthesizing urea. The household garbage treatment method comprises eight steps of: performing pyrolysis gasification, cooling, removing dust, performing deacidification and desulfuration, performing transformation reaction, adjusting the ratio of components, compressing and synthesizing. By adopting the method, the optimal ratio of the components required by the synthesis reaction can be adjusted, in particular the CO, the CO2, the H2 and the N2 can be comprehensively utilized, the N2 of an air separation device and the H2 of a purification system are synthesized to generate NH3, and the NH3 and the CO2 are synthesized to generate urea; biomass gas is used for generating electricity, so the heat efficiency can reach 30 to 40 percent; and by adopting the method, reclamation and zero emission of the household garbage can be realized.

Description

technical field [0001] The invention relates to a treatment method for household garbage, in particular to a method for pyrolyzing household garbage into combustible gas and using the combustible gas to simultaneously synthesize methanol and / or dimethyl ether, generate electricity and synthesize urea, which belongs to waste utilization technology field. Background technique [0002] Breakthroughs have been made in the exploration of commercial operation of pure biomass (such as straw and rice husk) gasification technology; the "coal gasification" technology of fossil products as raw materials has also been very successful, but the multi-component structure and complex composition of domestic waste, Which contains both biomass and fossils and other components, it is more complicated to deal with. [0003] Although there are many types of coal gasifiers currently used, typical ones such as Texaco, Lurgi, Kellogg, Topsoe, ICI, Winkler, etc., their technological processes ar...

Claims

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Application Information

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IPC IPC(8): C07C29/151C07C31/04C07C43/04C07C41/01C07C273/10F02C6/18F01K23/10
CPCY02E50/18Y02E50/12Y02E50/32Y02E50/11Y02E20/18Y02E50/10Y02E50/30Y02P20/10Y02P20/50
Inventor 于海军陈文徐淑萍王玉志张桂红李科
Owner SHENZHEN JUNENG BIOMASS GASIFICATION TECH
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