Serial fluid bed biomass gasifying device embedded with isolater and method thereof

Abstract

The invention discloses a serial fluid bed biomass gasifying device of inner isolator and method, which is characterized by the following: comprising with circulating fluidized bed, cyclone separator, spraying movement bed and refeed line cascade; separating a zone at the lower of the spraying movement bed with baffle plate; forming inner separator; communicating the bottom of the inner separatorand the spraying movement bed; communicating the inner separator and the lower of the circulating fluidized bed through refeed line; choosing the bed material of the spraying movement bed as inert heat carrier particle; adopting water vapour fluidization; pyrolising and gasifying for the biomass; getting coke particle; leading into the circulating fluidized bed with inert heat carrier particle through the spraying movement bed inner separator; burning the coke particle and air or oxygen; heating the inert heat carrier particle; separating the high temperature inert heat carrier particle through the cyclone separator; backing to the spraying movement bed; providing heat source for biomass pyrolysis and gasification.

Description

technical field [0001] The invention relates to a biomass gasification device and method, in particular to a serial fluidized bed biomass gasification device and method with a built-in isolator. Background technique [0002] Biomass has high volatile content, low fixed carbon, and relatively low activation energy. How to convert biomass into high-quality energy is the key to the utilization of biomass energy. The methods of converting biomass into high-quality energy can be mainly divided into two categories: biochemical methods and thermochemical methods (pyrolysis and gasification). The biochemical reaction speed is slow and large-scale production is difficult; There are more advantages in terms of chemicalization and so on. [0003] The existing biomass thermochemical gasification reactor adopts a single fixed bed or fluidized bed, with air as the gasification agent, and the biomass is partially combusted and gasified in the gasification reactor, and the heat required fo...

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Problems solved by technology

[0003] The existing biomass thermochemical gasification reactor adopts a single fixed bed or fluidized bed, and uses air as the gasification agent. The biomass is partially combusted and gasified in the gasification reactor, and the heat required for biomass gasification is obtained by combustion As a result, the flue gas produced by combustion is mixed into the gasification product, which significantly reduces the quality of the biomass gasification product

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