Emission of Burning Emulsified Diesel Oil with Sodium Sulfate in Salty Atmospheric Air

Journal of Environmental Science and Health, Part A

2004

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A marine furnace made of stainless steel. combined with an automatic small-size oil-fired burner, was used to experimentally investigate the influences of calcium oxide content in fuel oil on the combustion and emission characteristics under varying temperatures and humidity of the inlet air. Marine fuel oil generally contains various extents of metallic oxides such as CaO, Fe2O3, V2O5, etc which might affect its burning properties. In this study, an air-conditioner was used to adjust the humidity and temperatures of the inlet air to preset values prior to entering the burner. The adjusted inlet air atomized the marine diesel oil A containing a calcium oxide compound, to form a heterogeneous reactant mixture. The reactant mixture was thereafter ignited by a high-voltage electrode in the burner and burned within the marine furnace. The probes of a gas analyzer, H2S analyzer and a K-type thermocouple were inserted into the radial positions of the furnace through the eight rectangular slots which were cut in the upper side of the furnace. The experimental results showed that an increase of either humidity or temperature of the inlet air caused the promotion of the reaction rate of the fuel. The existence of calcium oxide compound in the diesel fuel also facilitated the oxidation reaction in the combustion chamber. The addition of CaO in the diesel fuel under the conditions of higher temperature or higher relative humidity of the inlet air produced the following: higher concentrations of CO2, SO2, and H2S emissions, an increased burning efficiency, a lowered O2 level, production of excess air and NOx emissions as well as a lower thermal loss and a lower burning gas temperature, as compared with the conditions of a lower temperature or a lower humidity of the inlet air. In addition, the burning of diesel fuel with added CaO compound caused a large variation in the burning efficiency, thermal loss, plus CO2, O2, and excess air emissions between the conditions of higher temperature/higher humidity and lower temperature/lower humidity inlet air compared with no CaO addition in the fuel. Moreover, the burning efficiency and the concentrations of excess air and O2 emissions increased, while the thermal loss, burning gas temperature and H2S, SO2, NOx, and CO2 emissions decreased with the increase of the axial distance from the measured location to the burner nozzle.

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Section: Resultssupporting

confidence: 52%

Influences of Calcium Oxide Content in Marine Fuel Oil on Emission Characteristics of Marine Furnaces Under Varying Humidity and Temperature of the Inlet Air

Journal of Environmental Science and Health, Part A

2004

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“…No. of testing location 60%RH, K 2 SO 4 =0 60%RH, K 2 SO 4 =300 ppm 90%RH, K 2 SO 4 =0 90%RH, K 2 SO 4 =300 ppm The concentration of carbon dioxide emission in the flue gas is one of the important indices for the extent of the completeness of the chemical reaction (Lin and Pan, 2003). The burning of marine diesel fuel with added potassium sulfide compound appears to have inferior combustion efficiency as shown in Fig.…”

Section: Methodsmentioning

confidence: 98%

Effects of potassium sulfide content in marine diesel fuel oil on emission characteristics of marine furnaces under varying humidity of inlet air

2006

Ocean Engineering

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Comparison of fuel properties and emission characteristics of two- and three-phase emulsions prepared by ultrasonically vibrating and mechanically homogenizing emulsification methods

2008

Fuel

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