摘要
凝汽器清洁系数是评价凝汽器性能最重要指标,其变化对循环水泵最优化调度将产生较大影响。在分析了凝汽器水侧污垢增长简化理论模型的基础上,得到凝汽器水侧污垢随时间变化的基本规律,分析了清洁系数随运行时间和冷却水流速变化的规律,并通过某600MW超临界汽轮机凝汽器循环水泵最优化调度作为实例,对凝汽器端差、凝汽器真空随清洁系数的变化趋势进行了分析,分析结果表明,不同清洁系数对循环水系统的优化运行方式造成影响,并得到了不同负荷、不同循环水温度及不同清洁系数下循环水泵的最佳运行方式,对火电厂循环水系统的运行具有一定的指导意义。
The fouling on the condenser water-side wall is an important factor that impacts the cleanness coefficient of condenser in the optimization of designing, operation and improvement of opening cooling water circulation system. Based on the mechanism of foul-forming, a comprehensive prediction model of fouling growth on condenser water-side wall is constructed in this paper. Through analyzing the simplified theoretical model of fouling growth, the characteristic of fouling deposit, effects of working time and cooling water velocity are discussed. Taking a 600MW supercritical steam power plantg condenser as an example, the accurate estimation and prediction of cleanness coefficient can be obtained with this model. The effects of the temperature＇difference and pressure of condenser are analyzed at the same time, and the work conditions of water circulating with different cleanness coefficient are obtained. With the evidence of some condenser fouling growth, it can be concluded that the present model is validity and would be contributed to water circulating optimization of condenser.
出处
《汽轮机技术》
北大核心
2015年第5期374-376,380,共4页
Turbine Technology
关键词
汽轮机
凝汽器
清洁系数
循环水优化
steam turbine
condenser
cleanness coefficient
optimum water circulating
