Liquid level analysis and compensation of the CDQ steam drum
Zou Tongfang;Shan Yongfeng;Meng Fanliang;Anshan HT Coking and Refractory Engineering Technology Co.,Ltd.;
With the method of balance containers and differential pressure transmitter measuring CDQ steam drum level,measuring range and transfer of pressure difference transmitter were according to the normal operation of the pressure inside the drum of saturation vapor and saturated water density scheduler calculation was obtained. But,in fact from the start to during normal operation of the steam drum pressure from zero gradually to meet the design pressure,and the drum of saturation vapor and saturated water density change with pressure,so in the process of the change,steam drum water level measurement will produce great error,and the error increasing with the decreasing pressure. Through the compensation formula and the linear regression equation,the steam drum water level measurement of pressure compensation method was proposed,and got good effect in practice.
【CateGory Index】： TQ520.5