There’s a power outage; I’m not sure whether it’s the high-voltage or low-voltage supply that’s affected. How should I operate the air separation equipment?
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Fully low-pressure air separation equipment, external compression process
...... That’s easy to explain – generally, DCS computers use low-voltage electricity, while oxygen compressors use high-voltage electricity. . . Typically, DCS systems or field PLCs are equipped with backup power supplies. If high voltage causes the oxygen compressor to shut down, the backup power supply of the field PLC can provide power for about 5 minutes, which is sufficient to start the backup pump and enable shutdown following the emergency stop procedures. In such a situation, all that needs to be done in the oxygen separation unit is to vent the oxygen. . If it is a low-voltage power outage, then use the backup power supply to shut down the equipment following the steps for a short outage during that time. . Furthermore, air separation units are equipped with many pneumatic valves; when the high-pressure and low-pressure power is cut off, the instrument air is also interrupted. The valves that need to be opened or closed can still be operated manually, and all that can be done is to manage those manual valves that are required for shutdown procedures, after which one has to wait for power to be restored. . . .
It seems like the original poster can’t even tell the difference between high voltage and low voltage in case of a power outage? There is a backup power supply for the DCS system in case of a power outage; follow the emergency shutdown procedures to restore power quickly
There’s a power outage; I don’t know which type of power is affected. Are your machines shut down or still running? Can’t you see that on the DCS?
This was a question raised by the leader; I’m passing it on to ask everyone
You should be aware of what equipment is used for low-voltage and high-voltage electricity. You need to anticipate in advance which power supplies will be shut off and what operations will be affected; I guess that’s what your supervisor means. Power outages cause little damage to the equipment, as there are safety protections in place; the key is to minimize the impact on subsequent processing steps.