Negative-pressure fuel coal coupled biomass gasification power generation system and electrical energy conversion method

Abstract

The invention relates to a negative-pressure fuel coal coupled biomass gasification power generation system and an electrical energy conversion method. Existing fuel coal coupled biomass gasificationpower generation system has the problems that a feeding system is unstable and often causes blocking and fuel gas backflow, large-area slag build-up often happens in the gasifier hearth and causes shutdown, the measures for controlling tar precipitation in gas are insufficient and consequently the tar stains the inner wall and the heated surface of a conveying pipeline and the heat exchange is influenced. The negative-pressure fuel coal coupled biomass gasification power generation system comprises: a feeding device (1), wherein the feeding device is connected with a gasifier system (2) through a pipeline; the gasifier system is connected with an ash treatment device (3) through a pipeline; the ash treatment device is connected with a gas cooling device (4) through a pipeline; the gas cooling device is connected with a gas conveying device (5) through a pipeline; the gas conveying device is connected with a gas burning device (6) through a pipeline; the gas burning device is connectedwith a fuel coal boiler (7). The invention is applied to a negative-pressure fuel coal coupled biomass gasification power generation system.

Description

Technical field: [0001] The invention relates to the technical field of biomass power generation, in particular to a negative pressure coal-fired coupled biomass gasification power generation system and a method for converting electric energy. Background technique: [0002] At present, several coal-fired coupled biomass gasification power generation systems have been proposed and applied, but there are still the following problems: (1) The feeding system is unstable, and accidents such as material blockage and flue gas backflow are prone to occur; (2) Gasification Large-area slagging in the furnace hearth is prone to cause shutdown of the furnace; (3) Insufficient measures to control the precipitation of tar in the gas, resulting in tar staining the inner wall and heating surface of the conveying pipeline, affecting heat transfer and even causing blockage; [0003] Biomass power generation technology is an energy-saving and environmentally friendly advanced power generation ...

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Problems solved by technology

[0002] At present, several coal-fired coupled biomass gasification power generation systems have been proposed and applied, but there are still the following problems: (1) The feeding system is unstable, and accidents such as material blockage and flue gas backflow are prone to occur; (2) Gasification Large-area slagging in the furnace hearth is prone to cause shutdown of the furnace; (3) Insufficient measures to control the precipitation of tar in the gas, resulting in tar staining the inner wall and heating surface of the conveying pipeline, affecting heat transfer and even causing blockage;

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