Abstract:

Since the last decade of the 20th century，due to the coal-dominated energy structure，increasing energy demand and the environment problems in China，building resources，energy，environment integrated and sustainable development energy system is the direction of China’s energy strategy. Coal staged conversion poly-generation system，integrating resources，energy，and environment realizes overall optimality. The main three poly-generation technologies，including coal pyrolysis and combustion poly-generation technology，coal partial gasification poly-generation technology and coal gasification poly-generation technology，are presented in this paper. A steam，electricity，coal gas and tar poly-generation technology is introduced，including detailed process of the poly-generation system and operating characteristics. Finally，based on the combined cycle poly-generation system，the energy-conservation and emission-reduction of the system are evaluated. The result shows that the power plant using coal staged conversion combined cycle poly-generation，is much more economical and energy-conserving than the traditional power plant.