METHOD AND DEVICE FOR MIXED FLOW TYPE GASIFICATION OF BIOMASS

摘要

Disclosed are a method and device for mixed flow type gasification of biomass. The gasification process comprises a pre-gasification stage and a post-gasification stage. In the pre-gasification stage, the biomass material is subjected to pyrolysis gasification by using a bottom feed type gasification process. In the post-gasification stage, the biomass material is subjected to pyrolysis gasification by using a top feed type gasification process, so that the biomass coke that does not completely react in the pre-gasification stage and part of fuel gas together enter a top feed type gasification device for gasification reaction. By using the method and device for mixed flow type gasification of biomass of the present invention, the bottom feed type gasification process and the top feed type gasification process are optimally combined to fully play the advantages of the two gasification processes. Meanwhile, the method and the device have the characteristics of low tar content, strong gas component regulation and control capacity, strong load adapting capacity, stability in operation and so on, have strong scale-up capacity, and can be widely used in gas supply, heat supply, power generation, liquid fuel synthesis and other fields.