电厂空冷岛喷雾冷却控制系统开发

为了解决内蒙准大电厂在夏季不能满负荷发电这一问题,提出利用喷嘴在散热器周围形成喷雾这一方法,促使散热器环境温度降低,提高散热器热交换率、降低煤耗、提高发电量,实现满负荷发电;为更好地控制雾化效果,设计一套喷雾冷却控制系统;系统以PLC为主控制器,以超声波液位传感器为反馈单元,电动调节阀为执行机构,实现大型容器的液位控制;系统能对水泵进行旁路调节,并具有速断保护功能;该系统运行结果表明,良好的雾化效果有效提高了电厂发电效益。

Development of Spray Cooling Control System for Air-cooling Island of Power Plant

In order to solve the problems of not full load power generation for Inner Mongolia Zhun Da power plants in summer, a method was presented to use spray nozzles to form fog in around the radiator to reduce environment temperature of the radiator, increase heat exchange rate, reduce coal consumption, increase output and achieve full load power generation. In order to better control the atomizing effect, spray cooling control system was designed with PLC for main controller, ultrasonic liquid level sensor for feedback device and electricity-controlled ratio valve for actuator to achieve liquid level control for large container. The system has functions of bypass regulation and quick break protection for the pump. The running result of system shows that better atomizing effect effectively improve the power generation benefit of power plant.