For hydrocracking units, what are the follow-up actions required to address issues after emergency pressure relief is initiated due to interlocks? ?
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After an emergency pressure release in the hydrocracking unit due to interlocks, the system pressure is very low; should the oil from the reaction system be removed? 1. If I want to return it, how do I do it? 2. If it’s not returned, how should we proceed with the next start of work? I hope the experts here will kindly share their insights! Thank you!
This needs to be answered by those in the petrochemical industry @ErQuan @sdykghlxc
It is only completely drained during shutdown for maintenance; there is no need to drain the oil if the machine is running for a short period of time
1. If driving for a short period of time, since the system is filled with fuel, what are the steps to get it running? How does the system heat up, increase pressure, and circulate? 2. If the vehicle is parked for an extended period, how can the oil in the reaction system be removed? How does the system heat up, increase pressure, and circulate?
Since an emergency pressure-rolling shutdown is carried out, the reaction system generally does not contain much oil; only a small amount of oil remains adsorbed on the catalyst. The reaction system simply needs to be heated and pressurized gradually, and feed can be added. In the distillation section, the process can be adjusted by switching to circulation mode for heating in order to obtain lower-boiling-point fractions
For long-term parking, oil is usually supplied to protect the catalyst; only a hot hydrogen circulation with oil is required! Take a closer look at the maintenance status
There is oil in the system at present; if hot hydrogen is used to carry the oil, it is necessary to increase the temperature and pressure. How exactly should these temperature and pressure increases be carried out?