Gasification process system for fine particle biomass or solid fossil fuel

Abstract

The invention discloses a gasification process system for fine particle biomass or solid fossil fuel. A combustion system adopts a circulating fluidized bed combustion technology and an efficient cyclone separation technology of the fine particle biomass or solid fossil fuel. The fine-particle circulating fluidized bed combustion technology adopts a flat-plate directional wind cap, so that refining combustion of coal particles is achieved; a fluidized bed gasification reactor system of the fine particle biomass or solid fossil fuel adopts a fine-particle gasification technology, and the fine-particle gasification technology adopts the flat-plate directional wind cap, so that the problems of low gas production rate and low gas production heat value in an existing coal gasification process system are solved; by virtue of an afterheat utilization system, the heat carried in the gasification process is transformed into steam, and is supplied to the fluidized bed gasification reaction system of the fine particle biomass or solid fossil fuel, so that the cost is reduced by using self-energy sources; and the gasification process system also comprises an ash treatment system and a gasification process gas purification system, so that the problem of waste of the heat carried in ash, and the problem that sulfide and dust carried in the gasification process are not thoroughly treated are solved.

Description

technical field [0001] The invention belongs to the high technology of clean fuel conversion in the field of energy and chemical industry, and in particular relates to a gasification process system of fine particle biomass or solid fossil fuel. Background technique [0002] Due to the current domestic environmental pollution and severe destruction, the country has more stringent requirements for environmental protection, so the current situation of direct combustion of biomass and coal is not allowed, and the sustainable development of biomass and coal must be considered. In the commonly used gasification process system: the particle size of the heat carrier and the material is too large, resulting in uneven mixing and insufficient heat exchange, which affects the gasification and cracking reactions; the separation efficiency of the cyclone separator is low, resulting in a large amount of gas carried by the gasification process The circulating ash in the gasification pr...

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of incomplete combustion of the existing circulating fluidized bed, high carbon content and high pollution in the fly ash; solve the problems of low gas production and low calorific value of the existing gasification and cracking devices; make full use of Carry out gasification and cracking reactions of its own resources to reduce costs; turn them into treasures and solve the problem of environmental pollution; solve the problems of impure and low calorific value of existing gas products

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