Reasons for the high pressure in the feed buffer tank of the gas fractionation unit
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Reasons for high pressure in the feed buffer tank of a gas fractionation unit: 1. High liquid level; 2. High temperature of the liquefied gas; 3. Presence of C2 components in the liquefied gas. Are there any other reasons?
It’s possible, but this is a problem I encountered during operation. There’s nothing wrong with our transmitters; it’s the high pressure that directly affects the amount of liquefied gas being sent to the refining process
Nitrogen was not removed during startup.
The safety valve or control valve on the top of the feed tank is malfunctioning, preventing the light components inside the tank from being discharged through the top, which results in continuously high pressure in the feed tank； Factors affecting refined incoming materials
It’s not at the beginning of construction, so this factor can be ruled out
If the safety valve on the top of the tank fails, it will activate and the pressure will drop. There is no control valve for adjusting the pressure at the top of the tank, so the pressure isn’t adjusted under normal conditions
What I mean is a failed safety valve – that is, when the pressure inside the tank reaches the set pressure of the safety valve, it fails to activate. A safety valve activating without cause is considered a fault
It should have entered the light components, such as ethylene
It’s just that there’s too much light component; take a sample for analysis