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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 direct air-cooled coal-fired generating units in the winter start-stop process, air-cooled condenser often occur a large area of freezing, damage and other accidents. Aiming at the main reason of freezing of air-cooled condenser, this paper puts forward some measures to control the operation parameters, such as adjusting the operating mode of cooling fan unit properly, stopping some air-cooled condensers and putting into bypass system to increase the intake air quantity of air-cooled island To prevent the air-cooled condenser from freezing.