硕士学位论文火电厂200MW机组改造的等效热降法分析.doc

（硕士学位论文）火电厂200MW机组改造的等效热降法分析 华北电力大学工程硕士学位论文摘要 摘 要 本文概括了正平衡法及等效热降法在火电厂热力系统计算中的概念、思 路，并对国产200MW汽轮发电机组进行了热经济性指标计算及比较。 针对火力发电厂生产过程中经常出现的实际问题，应用等效热降理论， 结合汽轮机热经济性计算结果和实际运行参数，分析了某电厂汽轮机四号低 压加热器频繁漏泄的原因，并提出了解决办法；分析了锅炉给水温度偏离设 计值的原因并提出系统改造措施。根据热力计算要求具备的参数情况，指明 某电厂实际安装的热力参数测点不足，为汽轮机组实现在线监测提供了可能。 关键词：热经济性，等效热降，改造方案 ABSTRACT the andideasofdirectheatbalancemethod Throughsummarizingconcepts and methodinthethermal calculationofthe equivalent enthalpydrop system thermal thermal for power economicindexeshomemade200MWsteam plant，the setshavebeencalculatedand inthis turbo-generator comparedpaper． the in Considering problems frequently practical occurring powerproduction reasonshavebeenindicatedandthesolutionshavebeen for process，the proposed low heaterNo．4 insome pressure frequent leakage powerplantthroughusing withthecalculationresultsofthermal method，combined equivalententhalpydrop andthe economyactual ofturbine．Thecausesforfcedwater operationparameters ofboilerhavebeenresumedforthedeviationtodesign performance，and countermeasuresof reformare tothedemandof system suggested．According measured forthermal was outthatthelackof parameters tests，itpointed leadstothe oftestsinsome