Biomass polygeneration method and system based on triple medium and low temperature fluidized bed

Abstract

The invention discloses a biomass poly-generation method and a system based on a triple medium and low temperature fluidized bed. The system comprises a biomass fluidized bed drying furnace, a biomassfluidized bed pyrolyzing furnace and a biomass fluidized bed gasification furnace, wherein a first biomass inlet for allowing biomass with a high water content to enter is formed in the biomass fluidized bed drying furnace; a second biomass inlet for allowing biomass with a low water content and a high volatile matter content to enter is formed in the biomass fluidized bed pyrolyzing furnace; anda third biomass inlet for allowing a biomass raw material to enter is formed in the biomass fluidized bed gasification furnace. According to the system and the method, graded utilization of the biomass raw material is achieved by the triple fluidized bed; sectional conversion of drying, pyrolyzing and gasification of the biomass raw material can be achieved; products of all conversion working sections can achieve efficient poly-generation; and the best economic benefit of a whole project can be achieved.

Description

technical field [0001] The invention relates to the technical field of conversion and utilization of biomass and solid waste, and specifically refers to a biomass polygeneration method and system based on a triple medium-low temperature fluidized bed. Background technique [0002] Under the condition of power shortage and abundant biomass energy in our country, biomass power generation has broad development prospects. Under the dual pressure of energy and the environment, vigorously developing clean and renewable energy has become a very urgent worldwide issue before governments all over the world. China is a large agricultural country with abundant agricultural and forestry biomass resources, huge quantities and diverse varieties. Under the background of favorable policies, the utilization of biomass resources has achieved considerable development in China, but at the same time there are still in-depth research and development in technology and equipment. wide open space. ...

AI Technical Summary

Problems solved by technology

At present, the better combustible gas purification method adopts wet purification system, that is, water washing and electric coke capture, and tar and water are extremely difficult to separate, which will cause water pollution and produce a large amount of waste water; at the same time, internal combustion engine or gas turbine power generation system is stable due to incomplete purification poor sex

[0006] At present, in domestic straw gasification power generation projects, the electric coke capture has requirements for the oxygen content in the gas. If it exceeds the standard, safety accidents may occur

When the syngas is washed and purified with water, although most of the dust and tar are removed, a small amount of tar remains. This small amount of tar seriously affects the operation of the internal combustion generator, resulting in poor stability, reduced efficiency and increased maintenance costs of the internal combustion generator. , especially large-scale grid-connected power generation cannot operate stably, and it is difficult to popularize and apply

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