Boiler P&ID advice

[u/Revolutionary_Tie551]

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!

[u/dirtgrub28]

Add some level switches for high and low level, same with fuel gas low/high pressure.

Maybe our units are just old, but there's no modulating air intake.

Usually an n2 pad somewhere for shutdowns/draining etc...