500MW机组给水泵选型布置及不同驱动形式的经济性比较热能与动力工程.doc

热能与动力工程毕业论文 题 目：500MW机组给水泵选型、布 置及不同驱动形式的经济性比较院 （部）：热能工程学院 专 业： 班 级： 姓 名： 学 号： 指导教师： 完成日期： 目 录 摘 要··································································Ⅲ ABSTRACT·······························································Ⅳ 1 前 言 ································································1 2 给水系统的确定·······················································2 2.1 单母管制系统··························································2 2.2 切换母管制给水系统····················································2 2.3 单元制给水系统························································3 3 给水泵型号的选择·····················································5 3.1 给水泵的扬程··························································5 3.2 给水泵的配置··························································6 3.3 给水泵流量的确定·····················································11 4 CHTA型高压锅炉给水泵··············································13 4.1 CHTA型高压锅炉给水泵的介绍·········································13 4.2 50CHTA/6型高压锅炉给水泵的性能曲线··································15 4.3 CHTA型泵的监视和保护···············································16 4.4 CHTA型泵的外形和安装尺寸···········································18 5 给水泵入口静压力的计算·············································21 5.1 除氧器的运行方式·····················································21 5.2 滑压除氧器在机组负荷改变时的运行状况·································22 5.3 给水泵入口静压力的确定···············································24 5.4 防止给水泵汽蚀的方法·················································27 6 给水泵的拖动························································30 6.1 电动给水泵和汽动给水泵的选择原则·····································30 6.2 给水泵驱动方式的确定·················································30 6.3 小汽轮机的选择·······················································36 6.4 小汽轮机的备用汽源··························