Microwave plasma biomass gasification fixed-bed gasification furnace and process

Abstract

The invention relates to a microwave plasma biomass gasification fixed-bed gasification furnace and a process, comprising a vertically arranged furnace body; a gasification furnace clearance zone is arranged at the upper part of the furnace body; a fixed bed is arranged at the lowest part of the furnace body; an raw material and fuel inlet, a product gas outlet and an oxygen / steam inlet are arranged on the furnace body; a slag notch is arranged at the bottom of the furnace body, and a synthesis gas monitoring unit is arranged at the position of the product gas outlet. The gasification furnace and the process are characterized in that: at least one microwave plasma generating device is arranged on the furnace body, the characteristics of high dispersion degree and high ionization of microwave plasma are adopted to achieve high-efficiency conversion of biomass fuel chemical energy in the furnace. The cold gas efficiency can be significantly higher than that of the conventional biomass gasification process and can reach more than 85%. Non-equilibrium cleavage reaction is carried out to tar and the like in synthesis gas, so that tar content is very low, direct industrialization utilization can be achieved, and the follow-up process is simple and reliable. No special requirements on the fuel particle size are demanded, simple breaking operation is only needed without complex processing, and the economy is good.

Description

technical field [0001] The present invention is mainly aimed at the field of gasification technology using biomass and solid waste as raw materials, specifically a gasification furnace and a gasification furnace that uses microwave plasma technology to efficiently utilize biomass fuel and solid waste to produce high-quality synthesis gas. craft. Background technique [0002] my country is very rich in biomass resources, such as cotton stalks, straws, branches, rice husks, etc., but the conventional high-quality fossil fuels as the main energy source are rapidly decreasing, and the society's demand for energy is increasing. Therefore, the use of low calorific value fuels attention will increase. [0003] At the same time, with the increasing awareness of environmental protection, while paying attention to the production and utilization of resources, high-tech technologies with higher efficiency and less pollution are gradually adopted by industrial production. [0004] At pr...

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Problems solved by technology

[0004] At present, in the biomass gasification fixed bed process, there are mainly problems such as low gasification temperature, high tar content, and low quality of synthesis gas. Due to the limitation of process conditions in conventional biomass fixed bed gasifiers, the synthesis gas contains tar , the existing purification process needs to spend a lot of money to deal with tar, and it is not easy to remove. Tar enrichment can block valves, pipelines and equipment, and cause corrosion to them, so it is extremely harmful and also affects biomass fuels, garbage Industrial utilization of synthetic gas

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