论述了循环流化床锅炉燃用石油焦和煤添加石灰石时对锅炉热效率计算的影响,通过分析循环流化床锅炉燃用石油焦和煤混合燃料添加脱硫剂时的物料平衡和灰平衡,得出采用国标GB10184—88《电站锅炉性能试验规程》计算锅炉热效率时,要对热量、烟气量和灰量进行修正。结合一台220t/h CFB锅炉实例,计算出实际测试工况下的热效率为89.5%。 The effect of adding petroleum coke and coal on the thermal efficiency calculation of circulating fluidized bed boiler is discussed. By analyzing the material balance and the ash balance of the circulating fluidized bed boiler with petroleum coke and coal mixed fuel to add desulfurizer, When using the national standard GB10184-88 “Boiler Performance Test Procedures” to calculate the thermal efficiency of the boiler, the quantity of heat, flue gas and ash should be corrected. Combined with a 220t / h CFB boiler example, the thermal efficiency under the actual test conditions was calculated to be 89.5%.