Wax oil hydroprocessing, thermal cracking – challenges with level measurement instruments
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The hydrogenation unit’s high-pressure section is equipped with four high-pressure level gauges, each accompanied by an oil injector. These four gauges often exhibit large fluctuations or drift to one side. As they are critical interlock instruments, the cause of these fluctuations has not been identified after several years. Sometimes, when thorough inspections are carried out, the oil injectors are temporarily turned off, which allows the readings to stabilize for a while. However, the process team doesn’t agree to keep the oil injector shut down for long periods of time. If the oil injector is actually turned off, the pressure pipe is prone to problems or blockages over time; it’s really difficult. Could someone with more experience suggest any good solutions?
Does yours come with chilled water?
Try reducing the flow rate of the high-pressure infusion; don’t stop it, just lower it a bit.
Now it’s adjusted to the lowest possible speed, yet there are still fluctuations.