1000MW二次再热机组双机回热系统应用研究

Study on the Application of Dual-machine Heat Regenerative System of 1000MW Secondary Reheat Unit

回热作为一个最普遍、对提高机组和全厂热经济性的有效手段,被当今所有火电厂的汽轮机所采用。本文通过以1000MW二次再热汽轮机组为例,对比常规回热系统与双机回热系统的不同,分析双机回热系统对机组热耗影响问题,探讨双机回热系统是大容量高参数煤电机组提高效率的必然趋势。

As one of the most common and effective means to improve the thermal economy of units and the whole plant,reheating is adopted by steam turbines in all thermal power plants.Taking the 1000MW secondary reheat turbine unit as an example,this paper compares the difference between the conventional heat regenerative system and the dual-machine heat regenerative system,analyzes the influence of the dualmachine heat regenerative system on the heat consumption of the unit,and probes into that the dual-ma.chine heat regenerative system is an inevitable trend to improve the efficiency of the large capacity and high parameter coal power unit.