Fluidized bed gasification reaction method and reactor employing packed fuel

Abstract

The invention relates to a fluidized bed gasification reaction method and a reactor employing packed fuel, and belongs to the field of gasification utilization of biomass energy. In the device, rich biomass straw resources in China are packed to serve as gasification raw materials, the packs are scattered by a front-furnace scattering device for feeding, and the problem that the conventional auger feeding equipment is easily damaged. By adopting low-true density porcelain granule sand as bed materials, the problem of easy slagging of the traditional quartz sand bed materials is effectively solved. The gasification reactor is a bubbling fluidized bed, is low in fluidizing velocity and effectively reduces the combustible ratio in fly ash. By adopting the expanded design, a gasification reactor body can reduce a fluidized dead zone of the bed materials, accelerate the bed materials to form an inner cycle and improve the fluidization quality. Therefore, the high-efficiency utilization of biomass straws is realized, and the device can be used as an ideal device for combining pulverized-coal fired boilers with biomass in future.

Description

technical field [0001] The invention relates to a fluidized bed gasification reaction method and a reactor using packaged fuel, and belongs to the field of gasification utilization of biomass energy. Background technique [0002] From the perspective of technology and cost, the co-combustion technology of biomass and coal is still one of the main ways to utilize biomass energy, but there are also the following problems: [0003] (1) It is difficult to make biomass powder, and the proportion of fly ash combustibles increases; [0004] (2) Biomass ash generated by combustion affects the utilization of fly ash; [0005] (3) The auger feeding equipment often gets stuck and causes damage to core components. [0006] This makes the biomass gasification reburning-indirect co-combustion technology get attention, this technology can effectively overcome the above shortcomings of direct co-combustion 2 , SO 2 and NO X Emissions are more advantageous. This technology requires the...

AI Technical Summary

Problems solved by technology

[0003] (1) It is difficult to make biomass powder, and the proportion of fly ash combustibles increases;

[0004] (2) Biomass ash generated by combustion affects the utilization of fly ash;

[0005] (3) The auger feeding equipment often gets stuck and causes damage to core components

Due to the enhanced heat transfer in the fluidized bed, fast and sufficient reaction speed, large gas production, high calorific value, and low tar content, this furnace type technology has been popularized and applied in some European and American countries. my country started relatively late. Guangzhou Energy Institute The developed circulating fluidized bed gasifier has several small-scale demonstration applications, but most of the gasification raw materials are forestry wastes, and there is no report on a fluidized bed gasifier suitable for biomass straw

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