A safety valve is installed on the pipeline leading to the hydrogenation feed pump, prior to the feed oil in the feed oil tank of the diesel hydrogenation unit. How should this be calculated?
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The last edit to this post was made by Sugu Cong 15873088027 on 2021-5-11 at 10:52. I would like to ask the experts: In a diesel hydrogenation unit, a safety valve is installed on the pipeline leading from the feed oil buffer tank to the hydrogenation feed pump. I wonder how the sizing of this safety valve is determined? How to determine the discharge capacity of a safety valve? Relief valve opening pressure? Is it designed based on the amount of hydrogen backflow? Thank you
The relief capacity of the safety valve is determined based on the condition of reverse flow of recycle hydrogen. The set pressure of the safety valve is determined according to its discharge destination; it is calculated by considering the backpressure ratio, assuming that a balanced bellows-type safety valve is used. The relief capacity can be calculated based on the number of check valves at the pump outlet and the provisions outlined in API 521 regarding leakage or failure conditions of check valves.