Are there any potential dangers associated with low pressure in a diesel pump?
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The diesel pump has low pressure, or it has stopped working. Will the reabsorption tower reverse its flow?
Well, this question is creative; I really hadn’t thought of it.
Yeah, I really hadn’t thought about this issue before. In my opinion, if it’s not addressed in time, things could definitely go back to normal, but this generally doesn’t happen during production, because when the pressure of the diesel pump is low, we notice it right away. As long as the control valves for the inlet and outlet of the absorption tower are closed in a timely manner, there shouldn’t be any problems! !
It’s entirely possible; such a situation occurred at one factory at the end of last year.
Why is it low? Is it due to the pump or something else? There has to be some range. Please explain it more clearly.
Even if it flows in the reverse direction, it won’t return to the fractionation tower, right? There’s a check valve at the outlet of the diesel pump after all
It is crucial that there is a check valve at the outlet of the diesel pump; as long as the check valve is in good condition, backflow will not occur. However, after the pump is stopped, the liquid level in the reabsorption tower drops rapidly. Liquid control valves are generally not tight, so dry gas can easily flow back from the rich absorption oil line to the distillation tower. At this time, note that if the pump is shut down for an extended period, the control valve handwheel should be closed. This post was last edited by Ocean Oasis on 2009-3-26 21:35.]
Actually, it mainly depends on the design of the process: diesel is handled by pumps and check valves, as well as control valves located in the absorption tower. Backflow is possible, but it’s easy to address!
Special attention should be paid to the dry point of the crude vapor, as it may result in non-compliance with standards. If diesel is used as the sealing oil, careful monitoring of the liquid level in the sealing oil tank is necessary; the inlet and outlet control valves for the diesel flowing into the absorption tower should be closed promptly to prevent backflow
It seems that diesel is rarely used in the reabsorption tower these days; we have never used it at all. However, upon analysis, the possibility of backflow from the pump to the fractionation tower is virtually none, but backflow from the rich absorbent oil stream is quite possible.