Will an emergency shutdown of the hydrocracking unit cause liquid to be present in the recycle hydrogen?
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I would like to ask the experts: In the paraffin oil hydrocracking unit, an emergency shutdown was initiated at 0.7 MPa. The temperature at the inlet of the hot high-pressure separator rose rapidly from 247 degrees to 347 degrees; the liquid level in the cold high-pressure separator increased from 17% to 27%, and its inlet temperature rose to 57 degrees. After the system pressure dropped to 2 MPa, the recycle hydrogen compressor stopped operating. After the emergency shutdown for repairs was completed, the cyclohydrogen compressor stopped operating again due to liquid leakage in the dry gas seal; upon disassembling the dry gas seal, \"significant liquid droplet marks were found at the primary seal.\" Excuse me, will there be a phenomenon of liquid carryover in the recycle hydrogen during an emergency shutdown?
The reason for liquid entrainment in the circulating hydrogen may be damage to the high-efficiency defoaming screen
Yes, when the emergency shutdown system experiences large fluctuations, it can cause liquid to be carried along; I’ve seen this happen several times
Therefore, after an emergency stop, the air cooling system must operate at full capacity.
A larger flow rate should increase the likelihood of liquid being carried along