Fluidized bed pyrolysis gasification device by adopting biomass gas recirculation process

Abstract

The invention discloses a fluidized bed pyrolysis gasification device by adopting a biomass gas recirculation process. The device comprises a fluidized bed gasifying furnace body, and a gasifying agent supply structure, an anti-leakage type feeding structure and a biomass gas circulating structure which are formed in the bottom end of the fluidized bed gasifying furnace body. The fluidized bed gasifying furnace body comprises a conical heating section, a pyrolysis section, a conical diffusion section and a settling section. The gasifying agent supply structure comprises an isobaric air bellow, an air distributor, and a cap arranged on the isobaric air bellow; the biomass gas circulating structure comprises a high-temperature exhaust duct, a dust exhaust fan, an air inlet pipeline and an injection pipe; the high-temperature exhaust duct is formed in the conical diffusion section and is communicated with the upper part of the conical diffusion section; the dust exhaust fan is arranged on the high-temperature exhaust duct; the air inlet pipeline is arranged on the dust exhaust fan and is communicated with the upper part of the conical heating section; and the injection pipe is arranged on the end of the air inlet pipeline and extends into the conical heating section. The device disclosed by the invention has the advantages of high adaptability, high efficiency, energy conservation, flexible operation and simple structure.

Description

technical field [0001] The invention belongs to the technical field of biomass thermochemical equipment, in particular to a biomass pyrolysis gasification device with a fluidized bed structure using a biomass gas recirculation process. Background technique [0002] In recent years, while our country has achieved great development that has attracted worldwide attention, it is also facing some severe challenges, especially environmental issues and energy issues, which have gradually become important constraints to economic and social development. In this regard, the Chinese government has increased its support for environmental protection and the promotion of new energy, and has successively proposed concepts such as energy conservation and environmental protection, circular economy, clean production, conservation-oriented society, new energy, and renewable energy. A series of industry-oriented measures have been introduced in many aspects such as standards, finance, and indus...

AI Technical Summary

Problems solved by technology

At this time, the biomass material is prone to compaction or coking, which will destroy the normal fluidization state of the material.

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