r/ChemicalEngineering • u/Revolutionary_Tie551 • Mar 16 '25

Design Boiler P&ID advice

Im currently designing a fire tube boiler for a 3rd year project and am now onto drawing my P&ID. ive attached my current design but im unsure if ive missed anything or if i am actually doing it correctly. Any advice would be massively appreciated!

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u/somber_soul Mar 16 '25

Lots of good comments here. In addition to whats been said, I see you have the top continuous blowdown, but missed the bottom blowdown. Bottom blowdown has two manual valves, one "slow" one "fast" for getting the settled out nasties in the bottom out to a blowdown receiver where it is cooled and sent to sewer.

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u/Down2throw H2O2 Plant Operator / former Recovery Boiler Operator Mar 17 '25

Slight addon here from experience on an 800# steam water tube boiler - we had a continuous blow down flash tank that supplied 175# steam supplement to our combustion air heaters.