Double-rapid fluidized bed gasification method and device for biomasses

A technology of fluidized bed gasification and fluidized bed gasification furnace, which is applied to the gasification of granular/powdered fuel, the manufacture of combustible gas, and the petroleum industry. Low gasification efficiency, low gasification efficiency and other problems, to achieve the effect of improving gasification rate, realizing effective reuse, and reliable operation

Active Publication Date: 2014-04-16
SOUTHEAST UNIV
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Problems solved by technology

At present, biomass gasification application devices are mainly concentrated in fixed-bed gasifiers, which have disadvantages such as high tar content in combustible gas, large amount of gasification agent water vapor, and low gasification efficiency during the biomass gasification process.
Countries such as Europe and the United States have proposed fluidized bed gasifier devices, which have the advantages of strong raw material adaptability, large production capacity and strength, and wide adjustment range, but there are problems such as low coke gasification rate, difficult control, and large tar output. And the disadvantages of low calorific value of gas production

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  • Double-rapid fluidized bed gasification method and device for biomasses
  • Double-rapid fluidized bed gasification method and device for biomasses
  • Double-rapid fluidized bed gasification method and device for biomasses

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Embodiment Construction

[0029] The present invention will be further described below in conjunction with the accompanying drawings.

[0030] In the biomass double-fast fluidized bed gasification method provided by the present invention, the biomass is loaded into the hopper 1, and the biomass is dried by the dryer 2 and sent into the first fast fluid bed pre-installed with the bed material through the screw feeder 3. In the fluidized bed gasifier A, the bottom of the first fast fluidized bed gasifier A is fed with a gasification agent, and the high temperature bed material in the first fast fluidized bed gasifier A plays a catalytic role in heating the biomass at the same time, After biomass pyrolysis and gasification, part of the components are converted into combustible gas, and the remaining part is converted into coke;

[0031] In the first cyclone separator 4, the combustible gas and coke are separated from the bed material through the first cyclone separator 4, and the separated coke and bed ma...

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Abstract

The invention provides a double-rapid fluidized bed gasification method and device for biomasses. According to the method, a biomass pyrolysis and gasification process is mutually coupled with a coke and combustible gas combustion process, wherein the pyrolysis and gasification of the biomasses is finished by a rapid fluidized bed gasification furnace A; the combustion of coke and combustible gas is finished by a rapid fluidized bed gasification furnace B, so as to gasify the biomasses by components of the biomasses; a combustion improver, namely pure nitrogen, does not need to be additionally provided. The device mainly comprises the rapid fluidized bed gasification furnace A, the rapid fluidized bed gasification furnace B, a hopper, a dryer, a spiral feeder, a cyclone separator, a material returning device, a three-way valve, a condenser, a tar collector and an air separator. The double-rapid fluidized bed gasification method and device for the biomasses are suitable for various biomasses including saw dust, rice husks and the like. The content of the tar can be effectively reduced.

Description

technical field [0001] The invention relates to a biomass double fast fluidized bed gasification device and method, belonging to the field of double fluidized bed biomass gasification. Background technique [0002] With the increasingly prominent global energy and environmental issues, changing the way of energy production and consumption and developing renewable energy has important practical significance for the sustainable development of society and the improvement of the ecological environment. Biomass has gradually become one of the key new energy sources due to its renewable, large quantity and clean advantages. In essence, biomass is a solid fuel containing hydrocarbons. The utilization methods of biomass mainly include biomass combustion technology, biomass pyrolysis technology, biomass direct liquefaction technology and biomass gasification technology. [0003] Biomass gasification technology is a hot research direction in the field of energy in the world in recen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10J3/56C10J3/84
Inventor 钟文琪赵浩川金保昇邵应娟刘倩
Owner SOUTHEAST UNIV
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