沁北发电厂超临界压力电站锅炉水冷壁截面温度场分析  

Analysis of the Water Wall Temperature Field of 600 MW Supercritical Boiler of Qinbei Power Plant

作　　者：张志正[1] 孙保民[1] 徐鸿[1] 郭永红[1] 

机构地区：[1]电站设备状态监测与控制教育部重点实验室(华北电力大学),北京市昌平区102206

出　　处：《中国电机工程学报》2006年第7期25-28,共4页Proceedings of the CSEE

基　　金：国家高技术研究发展863计划经费项目(2002AA526015)。~~

摘　　要：超(超)临界压力发电技术现在已经是成熟的技术,具有效率高、排放少、易于调峰、运行稳定的优点,是一次能源以煤为主的国家应大力发展的机组。但大多数机组存在水冷壁横向裂纹失效的问题,因此,有必要对这一问题进行深入研究。针对沁北发电厂600MW超临界压力锅炉膜式水冷壁,通过数值方法模拟了多种工况下水冷壁的温度场,分析了背火侧两个关键点的温差与向火侧危险点温度的关系,拟合出了关系式。此关系式可用于向火侧壁温的在线监测。文章还根据数值模拟结果对沁北电厂水冷壁管径的选择进行了评价。Ultra- and supercritical pressure electricitygenerating units with the virtues of high efficiency, low emission, good load regulation and steady operation should be developed actively in the nations that have plenty coal resource. But much transverse cracking of water wall tube failure occur in many units. In-depth research is needed. In the paper, membrane water wall temperature fields of 600 MW supercritical boiler of Qinbei power plant were calculated out in many work condition by numerical method. From analysis of relation of the difference of two key points on backside and severe points on fireside, formula can be fitted. The formula can carry out on-line monitoring temperature of severe points. The paper also makes an opinion on the design of the water wall tube.

关 键 词：热能动力工程 膜式水冷壁 壁温 数值模拟 拟合 

分 类 号：TK223[动力工程及工程热物理—动力机械及工程] TK229