直接空冷机组冬季启停冻结问题及防范措施  

Freezing Problems and Prerention Measures of Direct Air Cooling Generating Unit during Start-up and Shutdown in Winter

作　　者：孙立国 孙康明 田亚钊 

机构地区：[1]国电电力大同发电有限责任公司,山西省大同市037043

出　　处：《电力设备》2006年第10期70-72,共3页Electrical Equipment

摘　　要：大型直接空冷燃煤发电机组在冬季启停过程中,空冷凝汽器常常会发生大面积冻结、损坏等事故。针对空冷凝汽器冻结的主要原因,提出了控制运行参数,在停机过程中合理调整冷却风机组的运行方式,退出部分空冷凝汽器,投入旁路系统以增加空冷岛的进汽量等措施,以防止空冷凝汽器冻结。Large area freezing,damage etc. failures occen occur on the air cooling condensers during start - up and shutdown of large size direct air cooling coal- fred generating units in winter. In light of the main eauses of air cooling condenser freezing,the following antifreezing measures are raised.to control the operation parameters,to reasonably adjust the operation modes of cooling air fans units during shutdown,withdraw part air cooling condenser,put bypass system into operation to increase the incoming steam quantity of air cooling island etc., to prexent the freezing of air cooling condenser.

关 键 词：直接空冷机组 空冷凝汽器 启停操作 发电厂 

分 类 号：TK264.11[动力工程及工程热物理—动力机械及工程]