锅炉不同排污方式的热经济性分析  

Thermal economy analysis on different blowdown ways for boilers

作　　者：陈海平[1] 石志云[1] 王忠平[1] 吴文浩[1] 孙国经 

机构地区：[1]华北电力大学能源动力与机械工程学院,北京102206 [2]大同电力高级技工学校,山西大同037000

出　　处：《热力发电》2013年第2期12-15,共4页Thermal Power Generation

摘　　要：锅炉排污不仅影响机组的补水率,也会影响机组运行的热经济性。通过对某600MW机组锅炉运行特点的分析,定量计算了不同排污方式对机组运行热经济性的影响程度。计算表明,锅炉连续排污方式优于定期排污方式,尤其对具有蒸汽扩容器的排污系统,余热利用效果更显著。排污量需根据排污流量大小及锅炉水质进行判断。Boiler blowdown affects not only the unit replenishment rate,but also the thermal economy of the unit operation.The operation characteristic of a 600 MW unit boiler was analyzed to investigate the influence of different drainage modes on thermal efficiency of the unit.The results showed that,continuous blowdown was superior to periodical blowdown,especially for the boiler system with only steam expanding vessels.The blowdown flow rate needs to be determined by the boiler water.

关 键 词：锅炉 排污方式 定期排污 连续排污 热经济性 

分 类 号：TK227.6[动力工程及工程热物理—动力机械及工程]