Method for preventing fixed bed biomass gasifier from bridging

A gasifier and biomass technology, which is applied in the mechanical details of gasification devices, the manufacture of combustible gas, and the petroleum industry, etc., can solve the problems of increased cost and difficulty in realization, and can increase the gasification load, eliminate the generation of bridges, The method is stable and reliable

Active Publication Date: 2016-03-23
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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This method needs to modify the existing furnace structu

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  • Method for preventing fixed bed biomass gasifier from bridging
  • Method for preventing fixed bed biomass gasifier from bridging

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[0014] The present invention will be further described below in combination with specific embodiments.

[0015] The method for preventing the bridging of the fixed-bed biomass gasifier of the present invention is to transform the existing biomass gasifier (referred to as the gasifier), and add an air inlet pipe, and the air inlet of the air inlet pipe is arranged at the lower part of the gasifier Near the junction of the ash layer or the ash layer and the high-temperature carbon layer, part of the inlet pipe will pass through the high-temperature section of the gasifier, and the gas outlet is set in the drying section of the gasifier. During operation, the oxidant is introduced from the air inlet, and the oxidant is usually the same as the oxidant currently used for gasification of the gasifier, so as to reduce the operating cost and avoid affecting the gasification conditions. The oxidant flows out from the gas outlet after being heated at a high temperature in the gasifier. ...

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Abstract

The invention discloses a method for preventing a fixed bed biomass gasifier from bridging. The lower portion of the biomass gasifier is provided with a gas inlet. A part of a gas inlet pipe penetrates through a high temperature section of the gasifier. A gas outlet is formed in a drying section of the gasifier. During operation, an oxidizing agent is led into the gas inlet and heated in the high temperature section of the gasifier and then flows out of the gas outlet. Biomass nearby the gas outlet starts pyrolysis/gasification under the action of the high-temperature oxidizing agent to damage a generated bridge arch or a bridge arch about to be generated, and meanwhile the gasification load of the gasifier can be increased. A non-mechanical method is adopted to prevent the biomass gasifier from bridging, no moving parts are used, and the method is stable and reliable. Moreover, by slightly reforming an existing fixed bed gasifier, the provided technology can be applied to an existing gasification device.

Description

technical field [0001] The invention relates to the technical field of biomass energy utilization, in particular to a method for preventing bridging of a fixed-bed biomass gasifier. Background technique [0002] Biomass refers to various organisms produced through photosynthesis using the atmosphere, water, land, etc., that is, all living organic substances that can grow are collectively referred to as biomass. Compared with traditional fossil energy such as coal, oil, and natural gas, biomass energy has the advantages of being renewable, huge in total, widely distributed, low in sulfur content, and rapidly regenerated. Biomass utilization technologies can be roughly divided into: ⑴ direct combustion or co-combustion with coal, etc.; ⑵ thermochemical conversion technology; ⑶ biological conversion technology. Each biomass utilization technology has its optimal application conditions. The diversity of biomass species makes various biomass utilization technologies coexist and...

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Application Information

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IPC IPC(8): C10J3/20C10J3/72
CPCC10J3/20C10J3/72C10J2200/09
Inventor 王小波赵增立魏国强李海滨
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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