关键词: 煤种适应性, 燃煤机组, 锅炉效率, 煤耗

Abstract: Coal with different calorific values will have different impacts on boiler efficiency, auxiliary power consumption rate, net coal consumption rate and environmental protection indicators. In order to enhance the economic performance of thermal power plants, the boilers of four units with the capacity ranging from 300 MW to 1 000 MW are tested burning the coal of different calorific values. The test results show that with the coal calorific value decreasing by every 0.42 MJ/kg, the boiler efficiency will drop by 0.10%~0.18%, while the auxiliary power consumption rate will increase by 0.05%~0.12% and the net coal consumption rate will also increase by 0.33~0.79 g/kW?h.

Key words: coal flexibility, coal-fired unit, boiler efficiency, coal consumption