Can the modified level transmitter be used properly as shown in the diagram?
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The original storage tank had a level gauge that was very inconvenient to use; now it is planned to install a magnetic flap level gauge with a level transmitter. Since the storage tank cannot be perforated, it is planned to install level gauges on the inlet and outlet pipes. The feed to the storage tank is carried out via a pump; when the liquid level reaches the upper limit, the inlet valve closes automatically and the pump stops. Discharging from the storage tank is achieved by injecting compressed air above the tank to force the liquid out; when the liquid level drops to a certain threshold, the tank valve is automatically closed and the pump is started, while the inlet valve is opened to refill the tank. What are the disadvantages of such modifications, and can it operate properly?
Is it possible to make an opening in the inlet and outlet pipelines, lead a bypass pipe out, and then indirectly measure the liquid level in the bypass pipe to determine the liquid level in the tank? I’m not sure if it meets the specifications; I think this method can work, but whether it actually complies with the standards and will be approved is unclear.
Don’t external ultrasonic level gauges claim advantages such as no need for welding or opening the vessel? Contact the manufacturer and ask. But I think external applications aren’t very effective; it’s not the kind of method I’m referring to that is practical. Since I’m not a designer, I’m not sure whether it meets the relevant standards.
In your PID setup, it doesn’t seem appropriate to use a differential pressure type level transmitter on the inlet and outlet pipelines of the reactor; I’ve never seen such a setup before. It’s likely that there will be significant fluctuations, and with large pressure variations at the inlet and outlet, how can differential pressure be used effectively?
It’s generally not measured this way, but theoretically it’s fine; you can give it a try....
Pressure-type level gauges, when installed directly on the inlet and outlet pipes, definitely won’t work — once the pump starts, the readings will become inaccurate and fluctuate wildly...... . .
Magnetic flip switches installed on the inlet and outlet pipes still won’t work — once the pump starts, the readings will remain inaccurate and fluctuate wildly......
But then again, by using the feed pipe and discharge pipe and not adding any other openings, it’s possible to measure the liquid level steadily. I wonder how to measure it? I really do. There are valuable tricks and methods for this; if someone sends me a large WeChat red envelope, I’ll teach them! 137 0917 0262 Ever since I entered the instrumentation industry, all the money I’ve made was money spent on showing off. I want to earn a little money today, just for fun. Is that okay? {:2_42:}
It seems feasible, but this pipe looks quite small; it’s not certain whether a level gauge can be installed on it. Another question: when using air pressure to push out a liquid, how is the air discharged in the end?
Bro Zhu, is it possible to install an orifice plate on the inlet and outlet pipes to stabilize the flow and prevent large fluctuations? I’m not sure if this method will work