Hydrocracking emergency shutdown
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When a hydrocracking accident causes a forced shutdown, the principle is to start the 0.7 bar pressure relief first. At this time, does the heating furnace of the fractionation system need to be interlocked and shut down? Do the pumps of each side stripper tower need to be stopped after being evacuated? Please explain, thank you: L
It depends on the situation. If the cycle machine needs to be kept running, start 7 bar, and the fractionating furnace will not interlock and shut down. If the device is not inspected and repaired, work will still need to be started after the fault is resolved, and the liquid level in the reflux tank will be guaranteed to wait for work to start.
The safest way to shut down the hydrocracking accident is to unload it to the bottom, and then increase the temperature and pressure according to the operating procedures after the accident is resolved. This process takes a long time, and the fractionation part has a large cycle, and the fractionation furnace keeps the light on.