Positive-pressure coal firing/biomass gasification coupled power generation system as well as method for electric energy conversion

Abstract

The invention relates to a positive-pressure coal firing / biomass gasification coupled power generation system as well as a method for electric energy conversion. At present, a coal firing / biomass gasification coupled power generation system has the problems that a feeding system is instable and is liable to cause accidents such as blocking and flue gas returning, a hearth of a gasifier is liable to cause large-scope slag forming, which causes shutdown of the furnace, measures for controlling tar separation in flue gas is insufficient, which causes bad influence on heat exchange due to contamination of the inner wall and heated surfaces of a transporting pipeline due to the tar. The system includes a feeding apparatus (1) which is connected to a gasifier system (2) through a pipeline; the gasifier system is respectively connected to an ash treatment device (3) and a fuel gas cooling device (4) through pipelines; the ash treatment device and the fuel gas cooling device are connected through a pipeline; the fuel gas cooling device is connected to a fuel gas transporting device (5); the fuel gas transporting device is connected to a fuel gas firing device (6) through a pipeline; and the fuel gas firing device is connected to a coal-fired boiler (7). The method is used for the positive-pressure coal firing / biomass gasification coupled power generation system.

Description

Technical field: [0001] The invention relates to the technical field of biomass power generation, in particular to a positive 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 ...

AI Technical Summary

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;

Images