1350MW超超临界二次再热机组总体设计及经济性分析  

Thermal Design and Economy Analysis of 1350MW Ultra-super Critical Double Reheat Unit

作　　者：包伟伟[1] 杨宇[2] 康剑南[1] 余海鹏[1] BAO Wei-wei YANG Yu KANG Jian-nan YU Hai-peng(Harbin Turbine Company Limited, Harbin 150046, China Shanghai Power Equipment Research Institute, Shanghai 200240, China)

机构地区：[1]哈尔滨汽轮机厂有限责任公司,哈尔滨150046 [2]上海发电设备成套设计研究院,上海200240

出　　处：《汽轮机技术》2017年第1期21-25,46,共6页Turbine Technology

摘　　要：针对1350MW超超临界二次再热机组的总体设计问题,从基本循环参数选择、回热系统优化以及汽轮机组布置等方面进行了详细的论述及分析,并基于热力系统的分析计算方法,对其经济性水平进行了合理的估计。结果表明:通过采用高低位分轴布置方案以及冷端优化设计,可降低一次再热以及两次再热系统的蒸汽压降以及凝汽器压力,这两项技术合计可产生热耗收益90kJ/(kW·h),整个机组的热耗可达到6990kJ/(kW·h),机组的经济性水平比常规设计的1000MW超超临界二次再热机组明显提高。As for the problem of the thermal design of 1350MW ultra-super critical double reheat unit, the detailed analysis and discussion to the basic thermal cycle parameter selection, regenerative system optimization and turbine-generator unit display and so on are given. Based on the analysis and calculation method of thermal dynamic system, the reasonable estimate value of its economy level is also given. The results show that the first and second reheat system pressure drop are reduced by using two - shaft design, the condenser pressure is reduced by optimizing cooling end design. The unit heat consumption is reduced by 90kJ/（ kW · h） using these two technologies and can achieve to 6990kJ/（ kW · h）. Compared to 1000MW ultra-super critical double reheat unit with normal design, the unit economy is improved obviously.

关 键 词：汽轮机 超超临界 1350MW机组 热力循环 热力系统 总体设计 热经济性 

分 类 号：TK262[动力工程及工程热物理—动力机械及工程]