After the successful operation of SHW64MW hot water boiler jointly developed by yingkou luyuan boiler company and Harbin hongte boiler company in hunnan thermal power company in shenyang in 2008, more advanced boiler technology with lower burning calorimeter (2800 KGS) and higher efficiency has emerged continuously.Compared with the fluidized bed boiler, the thermal efficiency of the layer boiler burning the inferior coal is close to 84%, which has great advantages and has the possibility to replace it.