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首页> 外文期刊>Journal of Environmental Science and Health. A, Toxic/Hazardous Substances & Environmental Engineering >Influences of Calcium Oxide Content in Marine Fuel Oil on Emission Characteristics of Marine Furnaces Under Varying Humidity and Temperature of the Inlet Air
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Influences of Calcium Oxide Content in Marine Fuel Oil on Emission Characteristics of Marine Furnaces Under Varying Humidity and Temperature of the Inlet Air

机译：进风湿度和温度变化下船用燃油中氧化钙含量对船用炉排放特性的影响

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摘要

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, Fe_2O_3, V_2O_5, 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, H__2S 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 CO_2, SO_2, and H_2S emissions, an increased burning efficiency, a lowered O_2 level, production of excess air and NO_Χ 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 CO_2, O_2, 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 O_2 emissions increased, while the thermal loss, burning gas temperature and H_2S, SO_2, NO_Χ, and CO_2 emissions decreased with the increase of the axial distance from the measured location to the burner nozzle.
机译：使用不锈钢制成的船用炉结合自动小型燃油燃烧器，通过实验研究了在进气温度和湿度变化的情况下，燃油中氧化钙含量对燃烧和排放特性的影响。船用燃料油通常包含各种程度的金属氧化物，例如CaO，Fe_2O_3，V_2O_5等，它们可能会影响其燃烧性能。在这项研究中，在进入燃烧器之前，使用空调将进气的湿度和温度调节到预设值。调节后的进气将包含氧化钙化合物的船用柴油A雾化，形成非均相反应混合物。此后，反应物混合物在燃烧器中被高压电极点燃，并在船用炉内燃烧。将气体分析仪，H 2 S分析仪和K型热电偶的探针通过在炉子上侧切出的八个矩形槽插入到炉子的径向位置。实验结果表明，进气湿度或温度的升高都会引起燃料反应速率的提高。柴油中氧化钙化合物的存在也促进了燃烧室中的氧化反应。在进气温度较高或相对湿度较高的条件下向柴油中添加CaO会产生以下现象：较高浓度的CO_2，SO_2和H_2S排放，提高的燃烧效率，降低的O_2含量，过量的生产与进气的较低温度或较低湿度的条件相比，空气和NO_Χ排放以及较低的热损失和较低的燃烧气体温度。此外，在较高温度/较高湿度和较低温度/较低湿度的进气条件下，添加了CaO化合物的柴油燃烧导致燃烧效率，热损失，CO_2，O_2以及过量空气排放的变化很大。与燃料中不添加CaO相比。此外，随着从测量位置到燃烧器喷嘴的轴向距离的增加，燃烧效率和过量空气的浓度以及O_2的排放增加，而热损失，燃烧气体的温度以及H_2S，SO_2，NO_Χ和CO_2的排放减少。 。

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