I would like to ask if the CO waste heat boilers in catalytic cracking or MTO units are equipped with steam overpressure interlocks
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The boiler regulations require that boilers with a capacity of >6 t/h must be equipped with overpressure interlock protection. I would like to ask if the waste heat boilers installed within such systems also have this interlock in place, and whether it is mandatory to have it. Two safety valves have already been installed on the steam drum.
I said that the waste heat boilers I’ve come across generally only have interlocks related to a high superheated steam temperature and a low liquid level.
Thank you; it seems that the petrochemical design institutes don’t like to include overpressure interlocks
Yes, at least try to prevent the safety valve from activating; after all, its quality isn’t necessarily good, and there’s a risk that it won’t return to its original position. With your low evaporation rate, it shouldn’t be necessary