A hybrid power generation system and method based on solid fuel pyrolisis and char combustion

摘要

Abstract This invention relates to a hybrid power generation system and method based on solid fuel pyrolysis and char combustion, the system includes a pyrolyzer (1) for pyrolyzing solid fuel to produce gaseous, liquid and solid char fuels, in 5 which the gaseous and the liquid fuels are separated through a condenser (2), wherein, the separated gaseous and liquid fuels are respectively introduced into a gaseous fuel purifier (3) and a liquid fuel purifier (4) for dust removing and desulfurization; and the solid char fuel is supplied into a boiler (5) for combustion to generate steam; a gas turbine (7) for burning gaseous or/and 10 liquid fuels to generate electricity; and a steam turbine (8) for using steam to generate electricity. In the present method, solid fuel is pyrolyzed to produce gaseous, liquid, solid char fuels, and the resulted gaseous, liquid and char fuels are respectively introduced into gas turbine and boiler to produce steam to generate electricity. The present invention effectively simplifies the process, 15 reduces the cost, and takes both advantage of the IGCC and ultra supercritical power generation, and so the power generation efficiency is significantly improved, not only can be used in large power plants, but also can be used in small power generation units with medium and high parameters.