Why is re-contacting necessary when the restructuring shutdown occurs?
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Why is re-contacting necessary when the restructuring shutdown occurs?
1. High-pressure fluid leaks into the low-pressure side; liquid enters the outlet of the booster, damaging the compressor. 2. High outlet pressure in the centrifugal compressor leads to severe surge
Protect the booster to prevent liquid entrainment in the gas phase
Whether it is an emergency shutdown or a regular shutdown for maintenance, re-contacting is necessary, as the liquid levels in each tank cannot be maintained once the feed is interrupted. Meanwhile, by activating the recontact bypass in advance during the shutdown process, the oil and gas in the various recontact pipelines and air-cooling branches can be removed (hydrogen production is still ongoing at this time), thereby reducing the difficulty of replacing those pipelines with nitrogen during shutdown.
After the booster pump stops, if it is not isolated before being brought back into use, the liquid level in the tank cannot be maintained; in particular, the liquid level in the second-stage tank will become excessively high