600MW超临界机组低压加热器液位测量改造

Measurement and Transformation of Low Pressure Heater Liquid Level in 600MW Supercritical Unit

在大型发电机组运行过程中,低压加热器的液位测量是否准确直接影响到机组运行的可靠性和机组效率。通过对单、双室平衡容器测量系统的原理进行分析,指出了单、双室平衡容器测量系统的不足,而导波雷达液位计测量则可以直接检测容器中的实际液位高度和变化量,从而避免了平衡容器测量液位时由于温度、压力变化以及取样管存在漏点或堵塞对液位测量造成的影响,使真实液位检测变得简单易行,解决了虚假水位的问题。

In the process of large generating units,liquid level measurement of low pressure heater is a direct impact on the accuracy of the reliability and the efficiency of unit operation.By analyzing the principle of balance container measurement system,double room balance container,points out the deficiencies of measurement system,double room,and the guided wave radar level meter can directly detect the container in the actual liquid level and variation,thus avoiding the balance container liquid level measurement due to the influence of temperature,pressure and the sampling pipe leakage or blockage caused by presence of liquid level measurement,the real liquid level detection becomes simple,solves the problem of false water level.