低温省煤器对汽轮机组热力系统经济性影响研究  

Study of the Influence of a Low Temperature Economizer on the Thermal Cost-effectiveness of a Steam Turbine Unit

作　　者：程东涛[1] 马汀山[1] 陈恺[1] 居文平[1] 

机构地区：[1]西安热工研究院有限公司,陕西西安710032

出　　处：《热能动力工程》2015年第3期427-430,496,共4页Journal of Engineering for Thermal Energy and Power

基　　金：国家科技支撑计划基金资助项目(2011BAA04B03);中国华能集团公司科学技术资助项目(HNKJ12-H05)

摘　　要：以某1 000 MW机组为例,通过热耗率试验和等效焓降计算法分别计算投运低温省煤器对汽轮机组热力系统经济性的影响,两种方法分析结果一致,在汽轮机组1 000、900、800、700、600和500 MW试验负荷工况下,投运低温省煤器后汽轮机热耗率下降值分别为45.1、46.5、55.6、43.9、45.3和41.1 k J/(k W·h),投运低温省煤器后汽轮机组节能效果明显。To put a low temperature economizer into operation will directly affect the operation state of its boiler and steam turbine. The heat rate reduction method for steam turbines is regarded as an effective and practical method for analyzing and evaluating the influence of a low temperature economizer on the thermal cost-effectiveness of the whole unit. With a 1 000 MW unit serving as an example,the influence of the putting-into-operation of its low temperature economizer on the thermal cost-effectiveness of the steam turbine unit was calculated through conducting a heat rate test and by using the equivalent enthalpy drop calculation method respectively. The results calculated by using both methods are in good agreement. Under the condition of the steam turbine unit operating at a test load of 1 000 MW,900 MW,800 MW,700 MW,600 MW and 500 MW,the heat rate of the steam turbine decreased by 45. 1,46. 5,55. 6,43. 9,45. 3 and 41. 1 k J / k W·h respectively after the low temperature economizer had been put into operation,thus leading to a notably high thermal cost-effectiveness of the steam turbine unit and achieving a conspicuous energy-saving result.

关 键 词：低温省煤器 汽轮机 热耗 等效焓降 

分 类 号：TK264.1[动力工程及工程热物理—动力机械及工程]