冬季双机单循环水塔运行技术研究

Research of two units and single circulating water tower operation technology in winter

中国华电集团公司包头东华热电有限公司2×300MW机组循环水泵在工频状态下运行,循环水流量无较好的调整方式,冬季时因循环水量较小,水塔结冰严重,容易造成凝汽器钢管堵塞,端差、过冷度增大,水耗也偏大。经过技术论证,采用了冬季双机单循环水塔的运行技术,避免了水塔结冰,降低了端差和过冷度,水耗明显降低,经济效益十分明显。

The water circulating pump of the 2×300 MW unit of China Huadian Baotou Donghua Heat and Power Corporation Limited is driven by 50Hz power supply and is difficult to adjust the circulating water flow.In winter,the circulating water flow is smaller,and the serious icing occurs in the water tower,which causes that the pipe of the condenser is blocked,the terminal temperature difference and the subcooled temperature are increased,and the water consumption is increased too.According to the technical argumentation,the two units and single circulating water tower operation technology was adopted,the icing in water tower was avoided,the terminal temperature difference and the subcooled temperature were decreased,the water consumption was also reduced,and obvious economical benefits were obtained.