| 摘要:基于温湿图切线模型，采用直接加热法、空气加热混合法和冷凝法对温度为20~30 ℃、相对湿度为80%的船舶烟气进行消白设计。经湿法脱硫后，对于温度为30 ℃的烟气，用空气加热混合法所需的临界温升为直接加热法的49%，且空气加热混合法工艺较简单，经济性更好。针对某船舶主机设计空气加热混合法除白烟方案，加装混合器后，烟气和空气混合更均匀。CFD计算结果显示，在当量比为7.6%的理想空气条件下，混合器可使换热效果从4%提升至62%；当量比为13.7%时经济性较好，换热效果可达90%。 |
| 关键词: 湿法脱硫 烟羽治理 空气加热混合法 混合器温度场 |
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| White Plume Treatment Technology for Wet Desulfurization Exhaust Gas of Ships |
| LI Ming,XIAO Fei,YANG Yang,XUE Jing |
| Shanghai Marine Diesel Engine Research Institute， Shanghai 201108， China |
| Abstract:Based on the tangent model of the temperature-humidity diagram，the design of de-plume system was carried out for ship flue gas at 20?30℃ and 80% relative humidity using direct heating method，mixing air heating method and condensation method.For flue gas at 30°C after wet desulfurization，the critical temperature rise required by the mixing air heating method was only 49% of that of the direct heating method.The mixing air heating method had a simpler process and better economy.The de-plume system was designed for a ship main engine using mixing air heating method，and the installation of a mixer can make the flue gas and air mix more evenly.The CFD calculation results show that the mixer can increase the heat transfer effect from 4% to 62% at 7.6% ideal air equivalent ratio，and when the air equivalent ratio is 13.7%，the economy is better，and the heat transfer efficiency can reach 90%. |
| Key words: wet desulfurization plume treatment mixing air heating method mixer temperature field |
