Biomass crushed aggregate dense gasification device and method

Abstract

The invention discloses a biomass crushed aggregate dense gasification device and method. Straw is cut into segments with the length of 30-50 mm and directly enters a feed bin, the straw segments are pushed into a furnace through a spiral feeding rod and compressed by a sealing cone inlet, and the function of making gas in the sealed furnace not leak outwards is achieved while feeding is achieved. A dense spiral assembly conveys straw crushed aggregates downwards, the straw crushed aggregates form an inverted cone at the bottom of a body inner shell and are compacted with fire grates as supports, and a material layer meeting the gasification technological requirement is formed. The fire grates on the lower portion of a body comprises the movable fire grate and the fixed fire grate, it is guaranteed that a gasification agent is smoothly supplied, the movable fire grate is pulled by an oil cylinder and a transmission assembly to move in a reciprocating mode, and straw ash is scraped, falls at the bottom of an air box and is discharged through an ash remover. Generated gas is conveyed to a user from a gas outlet from bottom to top in the gasification device.

Description

technical field [0001] The invention relates to a dense biomass gasification device and method, belonging to the field of biomass gasification. Background technique [0002] At present, the existing biomass gasification methods in the market, there are fixed bed gasification furnaces divided into updraft type and downdraft type, which cannot be enlarged, and are only suitable for biomass pellets and corncobs. The gasification cost is high, and it is not suitable for a large number of Straw, because the straw material is light and floating, it is difficult to drop the material when feeding alternately under the sealed condition, and the phenomenon of swelling often occurs. Even if the gap between the materials in the gasifier is too large, the gasification process level cannot be formed. Combustion cannot achieve the purpose of gasification; the fluidized bed gasifier is only suitable for rice husks with uniform particle size, and the gasification efficiency is lower than 40%...

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Problems solved by technology

[0002] At present, the existing biomass gasification methods in the market, there are fixed bed gasification furnaces divided into updraft type and downdraft type, which cannot be enlarged, and are only suitable for biomass pellets and corncobs. The gasification cost is high, and it is not suitable for a large number of Straw, because the straw material is light and floating, it is difficult to drop the material when feeding alternately under the sealed condition, and the phenomenon of swelling often occurs. Even if the gap between the materials in the gasifier is too large, the gasification process level cannot be formed. Combustion cannot achieve the purpose of gasification; the fluidized bed gasifier is only suitable for rice husks with uniform particle size, and the gasification efficiency is lower than 40%, and it cannot adapt to a large amount of straw; so far there is no large-scale and continuous straw in the market The gasification device is in operation, resulting in the indigestion of rural straw, and incineration on the spot pollutes the environment

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