Agriculture and forest biomass secondary process reaction gasification furnace

Abstract

The invention discloses an agriculture and forest biomass secondary process reaction gasification furnace and application thereof. A rotary kick-out device on the top of the gasification furnace is connected with a kick-out lifter; a secondary gasification reaction chamber is formed in a gasification furnace cavity on the middle part of the gasification furnace; the lower part of the gasificationfurnace is provided with a large-aperture fire grate and a fixed fire grate which continuously and reciprocally operate; a biomass charcoal cooling chamber and a charcoal discharging port are formed below the reciprocating large-aperture fire grate; the charcoal discharging port is hermetically connected with a discharge device; and a gasification gas extraction port is formed above the reciprocating large-aperture fire grate and is connected to a dust collector by using a pipeline. The gasification furnace has the advantages that: agriculture and forest biomass (without crushing) is fed intothe gasification furnace; reaction in the furnace is controlled by controlling height of a material layer, air volume of an extraction fan and air, serving as a gasification agent secondarily introduced by a blower; combustible gas and biomass extraction solution are obtained through purification and separation; and solid which is not completely pyrolyzed is biomass charcoal. The problems of highgas tar content and difficulty in gas purification caused by incomplete reaction, environmental pollution caused by influence on utilization of the combustible gas and the like existing in the conventional gasification furnace are solved.

Description

technical field [0001] The invention relates to an agricultural and forestry biomass secondary process reaction gasifier using agricultural and forestry biomass as the main fuel and its application. The invention belongs to the technical field of agricultural and forestry biomass gasification. Background technique [0002] At present, the main equipment of agricultural and forestry biomass gasification technology includes fixed bed gasifier and fluidized bed gasifier, and many problems of the current gasification equipment have been exposed in the development, which makes the technology encounter severe difficulties in the promotion. test. The three most important issues are: first, the current gasification equipment has relatively strict requirements on raw materials. The raw materials required for fixed bed gasification furnaces require uniform particle size and a certain density like rice husks, while fluidized bed gasification furnaces require The particle size of the ...

AI Technical Summary

Problems solved by technology

The three most important issues are: first, the current gasification equipment has relatively strict requirements on raw materials. The raw materials required for fixed bed gasification furnaces require uniform particle size and a certain density like rice husks, while fluidized bed gasification furnaces require The particle size of the raw material is required to be more uniform and finer, so that various agricultural and forestry biomass raw materials cannot be used directly at present, and they need to be crushed before they can be used; the second is that the discharge of biomass charcoal generated during the gasification process is theoretically continuous , but it is difficult to achieve in actual production, and it can only be discharged intermittently, resulting in unstable reaction in the furnace and unstable gas production. Gas, the storage space of combustible gas in the furnace is large, it is easy to cause the furnace to explode, and the safety hazard is serious

These three problems have caused many biomass gasifiers to stop production

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