Device and method for preparing low-tar high-heat-value combustible gas by three-section-type gasification of biomass

Abstract

The invention discloses a device and a method for preparing a low-tar high-heat-value combustible gas by three-section-type gasification of biomass. The device consists of a fluidized bed gasification reactor, a cyclone reforming reactor, a mobile bed catalytic reactor and a return feeder, wherein the upper end of the fluidized bed gasification reactor is communicated with the upper part of the cyclone reforming reactor; the lower part of the fluidized bed gasification reactor is communicated with the lower part of the mobile bed catalytic reactor through the return feeder; the top of the cyclone reforming reactor is communicated with the top of the mobile bed catalytic reactor; the lower part of the fluidized bed gasification reactor is also provided with a biomass particle feeding port and a first oxygen enrichment / water steam inlet; the upper part of the cyclone reforming reactor is provided with a second oxygen enrichment / water steam inlet; the bottom of the return feeder is provided with a third oxygen enrichment / water steam inlet. The device and the method for preparing the low-tar high-heat-value combustible gas by three-section-type gasification of the biomass can effectively solve the problems that at present, a biomass gasification technology is low in gas production heat value and is high in tar concentration, and can be used for preparing multiple high-quality combustible gases which can be directly applied to fuel gas devices. The system can run in a self-heating-type; the gasification cost is low; the energy utilization ratio is high.

Description

technical field [0001] The invention relates to a device and method for producing low-tar and high-calorific-value combustible gas by biomass three-stage gasification, and belongs to the field of solid waste resource disposal. Background technique [0002] With the improvement of my country's urbanization level, the demand for rural energy has increased and the energy structure has changed. The energy consumption of rural households has changed from traditional fuels such as straw and firewood to clean natural gas and liquefied petroleum gas fuels. Biomass resources have become regionalized. , seasonal and structural excesses. A large amount of biomass is directly incinerated, which not only wastes precious resources, but also seriously pollutes the environment. Therefore, how to solve the way out of biomass disposal and realize the efficient recycling of biomass energy has become a major problem to be solved urgently in the construction of new socialist countryside in our ...

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problems of low calorific value of gas production and high tar concentration in the current biomass gasification technology, the present invention proposes a three-stage gasification device that separates biomass pyrolysis, tar reforming and coke gasification And method, can produce low tar high calorific value combustible gas, and gasification efficiency is high

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