How do biomass boilers remove nitrogen oxides from flue gas?
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Recently, I saw a 15-ton SZL steam boiler in use at a facility; it burns biomass. Due to local environmental regulations, its nitrogen oxide emissions were above the allowed levels, so an additional system was installed to add ammonia water into the furnace. I would like to ask what technical requirements this system has, and how does the addition of ammonia water help reduce emissions? Specifically, where in the furnace should ammonia water be sprayed?» ? ? ?
This is the SNCR method for denitration; you can find more information on it online
Ammonia water is added to the furnace; adding it directly is not possible – a treatment system is required.
I just checked online, and it’s indeed this method: spraying it in the high-temperature area at the back of the furnace to reduce NOx to N2 and H2O. Thank you.
How much are the boiler’s NOx emissions? Let’s see how much more it is