Technological method for producing biogas by utilization of organic matter

A technology of bio-natural gas and process method, which is applied in the field of bio-energy development and environmental protection, and can solve the problems of high production cost of bio-natural gas

Inactive Publication Date: 2014-08-06
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CH in biogas 4 The content is usually 45-60%, while CH in biogas 4 The content requirement reaches more than 95%, which makes the downstream purification link bear a high purification load, which is the fundamental reason for the high production cost of bio-natural gas

Method used

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  • Technological method for producing biogas by utilization of organic matter

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Embodiment Construction

[0025] The present invention provides a process method for producing bio-natural gas by utilizing organic matter. The present invention will be further described below in conjunction with the accompanying drawings and specific implementation methods. The following detailed description is only to illustrate the general principles of the present invention, and is not restrictive. Reasonable adjustments and modifications can be made according to the different properties and processing requirements of the raw materials to be processed in the actual application process.

[0026] refer to figure 1 , first, according to the physical and chemical characteristics of organic waste and fermentation requirements, the raw materials are sent to the pretreatment device 1, and according to the properties of the raw materials, physical, biological or chemical methods can be used for pretreatment, and then the inoculum and fermentation raw materials are added to carry out Mixing, the mass ratio...

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Abstract

The invention discloses a technology for producing biogas by the utilization of an organic matter. The pretreated organic matter undergoes biodegradation by the adoption of an anaerobic dry fermentation technology. During the process, a liquid spray device which is arranged on the upper portion of a dry fermentation device is turned on. According to the mass transfer need of dry fermentation and the need of liquid on the absorption of CO2, the distribution of a spray liquid between the upper gas space and a lower fermentation heap is controlled to guarantee stable operation of dry fermentation and continuous dissolution of CO2 by the spray liquid. The liquid for the dissolution of CO2 is pumped into a decarburizing unit to remove CO2 and then returns into the dry fermentation device to continuously absorb CO2. Methane enriched biogas with the content of CH4 being greater than 85% is produced by this means and then undergoes depth purification to obtain high-purity biogas with the content of CH4 being greater than 95%. The combination of dry fermentation and methane in situ concentration has created conditions for reducing the production cost of biogas. Therefore, the technological method provided by the invention has multiple functions of environmental protection, comprehensive utilization of resources and clean fuel gas output.

Description

technical field [0001] The invention belongs to the technical field of bio-energy development and environmental protection, and in particular relates to a process for preparing bio-natural gas by using organic matter. Background technique [0002] Driven by energy conservation and emission reduction policies and economic development needs, my country's natural gas consumption is growing at an annual rate of 16%. It is estimated that by 2020, natural gas consumption will be close to 300 billion m 3 , then natural gas consumption will account for 8% to 10% of the total primary energy consumption. In order to meet the demand for clean energy in social and economic development, the development of bio-natural gas as an alternative fuel to natural gas has become an important development trend. The use of organic waste such as straw, urban organic waste, and farm manure to produce biogas, and then further purification to produce biogas to replace conventional natural gas is attrac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10L3/06C10L3/10C12P5/02
CPCY02E50/343Y02E50/30
Inventor 杨世关赵圆方李继红郑宗明王体朋覃吴
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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