Garbage biomass pyrolysis gasification system

Abstract

The invention discloses a garbage biomass pyrolysis gasification system which is characterized in that: blending a dried biomass raw material and a microwave catalyst on a feeding screw, and after the material reaches 100-300 DEG C, pumping the material into a microwave reactor for pyrolysis gasification; carrying out gas-solid separation on the pyrolysis product to obtain gaseous pyrolysis volatile components and solids; returning the solid to the reactor, enabling the solid and the residual solid in the reactor to enter a lifting pipe for combustion, and performing cyclone separation on a combustion product to obtain a regenerated catalyst and high-temperature flue gas; and subjecting the regenerated catalyst and the gaseous pyrolysis volatile component in the step to a high-temperature cracking reaction through a return pipe to prepare a high-quality biomass gas product. The biomass pyrolysis gasification system comprises a raw material dryer, a microwave generator, a pyrolysis reaction cavity, a lifting pipe combustor and a return pipe. The method and the system are high in pyrolysis speed and low in energy consumption, the obtained biomass gas is high in quality, the requirement of synthesizing liquid fuel can be met, and the method and the system have good application prospects.

Description

Technical field [0001] The invention relates to a waste biomass pyrolysis and gasification system. Background technique [0002] As a new technology for energy development, biomass gasification technology can convert low-grade solid biomass raw materials into high-grade clean gas fuels, which can effectively reduce greenhouse gas emissions and is a sustainable clean energy conversion. technology. Compared with the traditional gasification method, the microwave heating method can achieve simultaneous heating of the inside and outside of the material, strengthen the heat transfer process of the material, which is beneficial to increasing the biomass gasification rate, and through reasonable temperature control, secondary reactions can be reduced , simplifying the final product. Many studies have proven that the microwave pyrolysis gasification product is rich in syngas components, and the by-product biosemi-coke has higher reactivity than non-microwave pyrolysis semi-coke, a...

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Problems solved by technology

However, the above methods all have the problem that the catalyst is difficult to recycle and reuse, and in order to improve H2 / CO, a large amount of water vapor is consumed, which increases energy consumption and gas consumption, and the process economy is not high.