Paul R Orlowski
Injecting BFW vs steam can present two problems I know of: 1) the latent heat of vaporization is energy wasting in a very heat intensive furnace. One should always make steam at a boiler instead of a process furnace if possible. If your unit is furnace limited then this could cause rate cuts. 2) if your bfw is of poor quality you can get inorganic deposits on your tubes as bfw is vaporized which are catalysts to coking thus reducing furnace run length.
-posted in behalf of pkpb