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Method for separating and producing methane and carbon dioxide from marsh gas

A technology of carbon dioxide and biogas, applied in chemical instruments and methods, inorganic chemistry, gas fuel, etc., can solve the problems of not exerting economic benefits, and achieve the effect of low-carbon economic cycle, simple process and low energy consumption

Active Publication Date: 2012-01-25
北京昊业怡生科技有限公司
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Problems solved by technology

A small amount is collected for boiling water for cooking or power generation for self-use, without greater economic benefits

Method used

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  • Method for separating and producing methane and carbon dioxide from marsh gas
  • Method for separating and producing methane and carbon dioxide from marsh gas

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Embodiment Construction

[0015] Referring to accompanying drawing, production method of the present invention is carried out as follows.

[0016] 1. Pretreatment, in order to separate high-purity methane and carbon dioxide from biogas, while protecting the adsorbent from pollution. Before separation, the biogas needs to be pretreated to remove low-level impurities such as hydrogen sulfide, water vapor and dust in the biogas. Make the sum of the volume of methane and carbon dioxide account for more than 97% of the total volume of biogas. The invention adopts iron oxide to remove hydrogen sulfide, adopts sponge to remove dust, and adopts silica gel and molecular sieve to remove water.

[0017] The pretreatment method is: send the biogas generated in the process of landfill, anaerobic digestion of organic waste or anaerobic treatment of high-concentration organic wastewater into the gas storage bag 1 through the pipeline; the biogas in the gas storage bag 1 flows through the valve to Desulfurization to...

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Abstract

The invention relates to the fields of environment friendliness and renewable energy source recycle. A method for separating and producing methane and carbon dioxide from marsh gas, which is realized through five steps as follows: pretreatment, methane separation, rich liquid flash vaporization, carbon dioxide recycle and adsorbent regeneration. The volume ratio of the separated methane is up to over 96%, and the volume ratio of the carbon dioxide is up to over 98%. The invention has the characters tics of simple process, low energy consumption, nontoxicity, high purity and safety process. Byusing the method, not only is low-carbon circular flow of economy realized, but also pollution to the environment is prevented.

Description

technical field [0001] The invention relates to the fields of environmental protection and renewable energy recovery and utilization. In particular, it relates to a method for the separation and production of methane and carbon dioxide from biogas generated during landfill, anaerobic digestion (treatment) of organic waste, and the like. Background technique [0002] A large amount of biogas can be produced in landfill and anaerobic digestion of organic waste. The main components of biogas are methane and carbon dioxide, and also contain a small amount of oxygen, nitrogen, hydrogen sulfide, moisture and other substances. The raw materials used to generate biogas are different, and the content of methane and carbon dioxide in biogas is different. For example, methane in the biogas produced by urban domestic waste landfills accounts for about 50% to 60%, and carbon dioxide accounts for about 32% to 40%. Carbon dioxide accounts for about 18% to 35%. my country's follow-up ap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L3/10C01B31/20C01B32/50
CPCY02P20/133
Inventor 于景成田丹靳国良丁雪梅田艺伟张有辛凯桑力维
Owner 北京昊业怡生科技有限公司
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