Combined biomass gasification device and biomass gasification method

Abstract

The invention discloses a combined biomass gasification device and a gasification method. The gasification device comprises a pyrolyzing furnace, a gasification furnace and a hot cyclone separator, and a baffle plate and a gasification furnace annular baffle plate are arranged in the gasification furnace from top to bottom; therefore, the interior of the gasification furnace is divided into a particle circulation return area, a particle circulation descending area, a particle center gasification area and a particle circulation feeding area which are respectively communicated with a bottom ash pool, the gasification furnace is further provided with a raw material inlet, a gasified material outlet and a bottom air inlet, a heat exchange water pipe B is further arranged on an inner baffle plate of the gasification furnace 2, and gasified materials enter the hot cyclone separator through the gasified material outlet after being subjected to heat exchange through the heat exchange water pipe B. According to the combined biomass gasification device and the biomass gasification method provided by the invention, the defects of incomplete tar conversion, poor fluidization state, low energy utilization rate, incapability of long-term operation and the like in the biomass gasification process are overcome, the efficient gasification of biomass carbon is improved, and the combined biomass gasification device and the biomass gasification method have a wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of biomass gasification, and in particular relates to a combined biomass gasification device and a gasification method. Background technique [0002] Biomass is an important renewable energy in many energy utilizations. It is widely distributed and has a huge quantity. It can be directly used as fuel or as a chemical raw material. At the same time, due to its low energy density and dispersion, it is difficult to deal with large-scale centralized treatment, so the utilization level of biomass in most developing countries is relatively low. The high-efficiency biomass gasification technology can achieve high utilization rate on a small scale, and can provide high-grade energy forms, especially suitable for rural areas, developing countries and regions, so biomass gasification technology is an important direction of development. Due to China's vast territory and rich biomass resources, traditional incineratio...

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Problems solved by technology

[0005] The invention provides a combined biomass gasification device and a biomass gasification method, which solve the problems of incomplete conversion of tar (high tar content), poor fluidization state, low energy utilization rate and inability to last a long period of time during the biomass gasification process. Insufficient operation, etc., and improves the high-efficiency gasification of biomass carbon, which can be applied to the industrial production of biomass gasification

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