Shoreside Boiler Demonstration of Fuel-Water Emulsions

摘要

Efficiency and emission (particulate and N0x) measurements were performed on a U.S. Coast Guard shoreside boiler. The purpose of the program was to assess any benefits and/or penalties associated with firing a water-in-oil emulsion. The project included installation of instrumentation required for efficiency measurements, identification and installation of a suitable low energy emulsifier and metallographic analysis of tube samples to determine corrosion and erosion due to firing an emulsified fuel for a heating season. Closely controlled tests were performed over the operating load range on the cleaned and tuned boiler firing both neat (straight) oil and emulsified oil. These tests were repeated after firing each of the respective oils for one normal heating season. The results showed the biggest gains in efficiency from boiler cleaning and tuning. There were no significant differences in efficiency when firing neat and emulsified oil. The boiler was slightly cleaner after firing emulsified fuel for the heating season. The particulate emissions were less for emulsified oil firing and excess air could be trimmed closer to stoichiometric.