Heating the Atomizing Air
Heating the Atomizing Air
(OP)
This is just a thought. I am planning to recover heat from continuous blowdown for heating the atomizing air before it goes into the boiler. Will this have greater impact or benefit regarding the efficiency of the boiler?





RE: Heating the Atomizing Air
but your use of the term "atomizing air" is a bit unusual, in that it does not usually enter the fire box as a separate connection. can you elaborate?
RE: Heating the Atomizing Air
The boiler is CB600-600-150psig. Before, it fires with bunker fuel but due to environmental restriction it is now firing low sulfur fuel oil(LSFO). The atomizing air is the initial air entering into the boiler combined with the fuel. A secondary air from the forced draft fan then enters forcing the flue gas out to the smokestack. I thought this is elementary?
Anyway, does preheating the atomizing air give any difference?
gladkenn
RE: Heating the Atomizing Air
improvement, not much at least on a BTU basis, just look at the energy balance.
in the heavier fuels atomizing steam is used, not because of the heat gain but to improve atomization of the oil
RE: Heating the Atomizing Air
The atomizing steam regime also mentioned by hacksaw is already sized (piping and gun tubing wise) for the steam at the operating conditions.
So, unless you system was initially designed for preheated atomizing air, (as some gas turbines using heated compressor discharge air are) I wouldn't do it.
There should be plenty of areas where you could recover the waste heat, like, for example preheating the fuel to the gun, rather than the air. Now there is a thought.
rmw
RE: Heating the Atomizing Air
Anyway I will try other ways of improving our steam system. Thanks alot guys!
gladkenn