HYBRID POWER GENERATION SYSTEM AND METHOD BASED ON CLASSIFICATION OF SOLID FUEL PYROLYSIS AND SEMI-COKE COMBUSTION

摘要

A hybrid power generation system and method based on classification of solid fuel pyrolysis and semi-coke combustion are provided. The system comprises a pyrolysis device (1) for pyrolysing solid fuel to produce gas, liquid and solid semi-coke fuels, the gas and liquid fuels are separated through a condensing device (2), then separately passed into purification devices (3) and (4) for dedusting and desulfurizing the gas and liquid fuels, and the solid semi-coke fuel is passed into a boiler (5) for combustion to generate steam; a gas turbine (7) for power generation by burning gas and/or liquid fuel, and a steam turbine (8) for steam power generation. The method is carried out by pyrolysing solid fuel to classify solid fuel and produce gas, liquid and solid semi-coke fuels separately entering into gas and steam turbines for power generation, so as to effectively simplify the process, reduce cost, integrate the advantages of the integrated gasification combined cycle (IGCC) and the super-critical power generation technology, and significantly improve the power generation efficiency, it not only can be used in large power plants, but also can be used in small generator sets employing middle or high pressure parameters.