For the emergency shutdown cooling interlock in SIS, is it necessary for the interlock to close the isolation valves on other jackets as well?
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For high-risk processes that require emergency shutdown and emergency cooling, the cooling water valves need to be opened – but do the valves for steam and other substances entering the jacket also need to be closed?
Of course the steam valve needs to be closed; otherwise how can emergency cooling be achieved?
Of course, the steam valve needs to be closed; otherwise, will water or steam enter? Does steam push the water away, or does the water push the steam away? How to deal with water hammer?
After closing the steam valve, is it necessary to release the steam from the jacket facade before introducing circulating water?
Personal understanding: Since it is an emergency interlock, the water valve opens fully at the same time as the steam valve closes, in order to cool down quickly