背压、抽汽供热式和冷凝式汽轮发电机组在化工行业中有广泛的应用。以满足工厂对电力和蒸汽的全部或部分需求。因而,在化工工程设计前期阶段,所拟定的热力系统中汽轮机功率和汽耗等的计算是必不可少的,它们是计算、优化系统热经济性和机炉组合方案的基本依据。在工程设计前期阶级,由于汽轮机尚未订货而无从得到必要的热力特性数据和工况 Backpressure, extraction steam and condensing turbine generator sets have a wide range of applications in the chemical industry. To meet the plant’s demand for electricity and steam in whole or in part. Therefore, in the early stage of chemical engineering design, the calculation of steam turbine power and steam consumption in the proposed thermal system is indispensable. They are the basic basis for calculating and optimizing the system thermal economy and the combination of furnace and furnace. In the early stage of engineering design, the necessary thermodynamic characteristics and operating conditions were not obtained due to the fact that the steam turbine was not ordered yet