Self-heating three-section biomass low-tar carbon gas co-production regulation and control device

Abstract

The invention discloses a self-heating three-section biomass low-tar carbon gas co-production regulation and control device. The device comprises a self-heating fluidized bed pyrolysis reactor, a homogeneous partial oxidation reforming reactor and a fixed bed gasification reactor. The fluidized bed pyrolysis reactor adopts air and water vapor as reaction media; in the partial oxidation reforming section, pure oxygen and volatile components are subjected to a strong partial combustion reaction, a large amount of heat is released, and tar is promoted to be subjected to strong cracking; and biomass coke generated by the pyrolysis section enters the gasification reduction section through a gas locking and material returning device, a small amount of residual tar after the gasification reduction reaction is subjected to deep catalytic cracking through a carbon bed, and the tar content at the outlet of the gasification furnace reaches an extremely low level. According to the invention, agriculture and forestry biomass wastes are converted into high-added-value synthesis gas and biomass activated carbon in a segmented conversion manner, self-heating and large-scale amplification of a gasification furnace pyrolysis process are realized by utilizing directional distribution of a gasification medium, and meanwhile, high-efficiency in-furnace removal of tar is realized.

Description

technical field [0001] The invention relates to the technical field of biomass gasification, in particular to a self-heating three-stage biomass low-tar charcoal-gas cogeneration control device. Background technique [0002] High tar content and low gasification efficiency are bottlenecks restricting the industrialization of biomass gasification technology. Traditional tar purification and removal methods include water washing, ceramic filtration, thermal cracking and catalytic cracking. These methods bring many problems, such as environmental pollution and increased system costs. The development of efficient and low-cost tar removal process has become the key. At present, it is generally believed in the world that the staged gasification technology combines the pyrolysis, combustion and gasification processes of biomass, which can reduce the tar content in the furnace. However, the traditional segmented gasification is small in scale and difficult to scale up effectively,...

AI Technical Summary

Problems solved by technology

[0004] Purpose of the invention: To solve the problems of high tar content and low gasification efficiency in the existing biomass gasification technology, the present invention discloses a self-heating three-stage low-tar charcoal-gas cogeneration control system, which is based on biomass pyrolysis gasification The characteristics of the process, using the method of decomposition coupling, divide the biomass pyrolysis gasification process into three stages, and use three different reactors for conversion respectively, so as to realize the self-sustainment of heat in each stage of biomass pyrolysis gasification, And achieve the purpose of efficient cracking in the tar furnace

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