Regulating valve control of process flow diagram
Thread Content
Please take a look at the gasoline hydrogenation process flow chart. In the picture, I marked the regulating valve. I see that this regulating valve is connected to my marked FC and at the same time connected to my marked TC. What is the function of this regulating valve? Is it to control the inlet temperature of R1101? Or control E1106? I don’t quite understand, please tell me, thank you
this is a temperature_Flow cascade control system. Use E-1106 flow to control R-1106 inlet temperature. TC is a temperature controller whose output adjusts the flow given value of FC. FC is a flow controller used to stabilize the SCW flow of E-1106. When there is no change in temperature, FC overcomes the disturbance and stabilizes the SCW flow ； When the temperature is disturbed and changes, adjust the FC given and increase/decrease the SCW flow rate.
This is not a contradiction. What the third floor said is correct. This is a cascade regulation system. The temperature of the inlet material entering R-1106 is controlled by adjusting the medium-pressure steam flow into the heat exchanger E-1106. The medium-pressure steam and the imported material of R-1106 exchange heat in E-1106. If the steam flow is large, the inlet temperature of R-1106 will be high. If the steam flow is small, the inlet temperature of R-1106 will be low.