Automatic control of liquid level and control valves
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How can we modify the heat network heaters, magnetic flap level gauges, and recirculation control valves of these heaters in order to achieve automatic level control via interlocking? Currently, it is time-consuming and laborious to adjust the level manually; we would appreciate your advice!
I suggest you represent the process control plan simply with a diagram; what you’re describing is too abstract and it gives me a headache!
Magnetic flap level gauges can be equipped with remote transmission to display on a DCS, and we have many such examples in our factory.
Without knowing the process flow, I can only give a rough idea: through interconnection, once the liquid level reaches a certain set point, the feed valve is controlled to close or adjust its opening degree.
Find a manufacturer of magnetic flap valves and have a level transmitter installed on those valves; the signal from the transmitter is sent to the control system along with the control valve, thus forming a control loop
It is feasible; the magnetic flap manufacturer needs to provide a level signal output (the price will be significantly higher compared to those without such a signal output), and then interlocking can be established between the level and the opening degree of the feed control valve.
Without a flowchart, I can only describe it roughly: a magnetic flap level gauge is equipped with a magnetostrictive level transmitter to enable remote monitoring; the opening degree of the control valve is adjusted through DCS process parameter settings, thus achieving automatic control.
A closed-loop control loop is formed by the liquid level and the control valve configuration, thereby enabling automatic control
Could you specify what equipment is needed?
It is feasible to achieve this: if there is a DCS or PLC, the flap level gauge and the recirculation control valves for the heat network heaters can be integrated into the DCS or PLC, provided that remote signaling is available. If the control requirements are not high, an analog display device with PID control can be used instead
It is feasible to achieve this: if there is a DCS or PLC, the flap level gauge and the recirculation control valves for the heat network heaters can be integrated into the DCS or PLC, provided that remote signaling is available. If the control requirements are not high, an analog display device with PID control can be used instead