Biomass gasification catalytic cracking process and integral gasification catalytic reactor

Abstract

The invention relates to a biomass gasification catalytic cracking process and an integral gasification catalytic reactor. According to the process, the integral reactor of which the lower part is provided with a biomass gasification section and the upper part is provided with a tar catalytic cracking section is adopted; the biomass gasification section is a fluidized bed, air serving as a primary gasification agent is introduced from the lower part, biomass enters the reactor from the middle-and-lower part to perform oxido-reduction gasification reaction with the gasification agent at the temperature of between 600 and 750 DEG C to generate gas accompanied with tar; the gas accompanied with the tar enters the tar catalytic cracking section on the upper part, the tar catalytic cracking section is a fixed bed into which a tar cracking catalyst is filled, a secondary gasification agent is introduced from the lower lateral part for filling the tar cracking catalyst, and the tar is cracked and converted into small-molecular combustible gas in the tar catalytic cracking section at the catalytic cracking temperature of between 750 and 800 DEG C; and generated ash content is discharged from an ash discharge opening on the lower part of the reactor, and the gas is discharged from a gas outlet on the top of the reactor to enter the next process. By the biomass gasification catalytic cracking process, the problem that the tar is separated from flying ash difficultly in the biomass gasification process is solved, and the gasification efficiency is improved.

Description

technical field [0001] The invention relates to biomass energy utilization technology. It specifically relates to a process and a reactor in which biomass gasification and tar catalytic cracking are carried out in an integrated reactor. technical background [0002] Biomass gasification is one of the most promising methods for large-scale utilization of biomass energy, however, the tar produced during biomass gasification seriously hinders its large-scale application. How to develop a low-tar or no-tar biomass gasification catalytic reactor is the key to solve the above problems. [0003] At present, biomass gasification is divided into two types: fixed bed gasifier reactor and fluidized bed gasifier reactor according to the type of gasifier used, and the fixed bed gasifier reactor is divided into downdraft type and updraft gasifier reactor. There are four types of suction type, horizontal suction type and open heart type; the fluidized bed gasifier reactor is divided into...

AI Technical Summary

Problems solved by technology

It overcomes the problem that the existing process method is easy to block the gas pipeline, and the gas produced by the gasification of a large amount of biomass is burned, and at the same time improves the effective component H in the gas. 2

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