耦合海水淡化的船舶柴油机排气净化装置设计

Design of a marine diesel engine exhaust purification device coupled with seawater desalination

为综合高效实现船舶柴油机烟气废热回收海水淡化以提升尾气净化率,本文以KincaidB&W6L90GE型船舶柴油机为研究对象,提出一种耦合海水淡化的船舶柴油机废气高效净化技术,介绍了耦合海水淡化的船舶柴油机排气净化技术原理,理论设计计算耦合海水淡化的船舶柴油机废气净化系统的蒸发段和冷凝段,得到烟气余热回收制淡系统蒸发段和冷凝段的换热系数分别为42.29W/(m^(2)·℃)和1067.42W/(m^(2)·℃)、换热面积分别为517.31m^(2)和38.26m^(2),该系统整体尺寸为Φ6m,总高度为6.452m,并进一步得到船舶烟气净化系统整体尺寸为Φ4.0m,总高度为9.66m,完成了系统的整体尺寸设计计算和结构布置。

To comprehensively and efficiently achieve waste heat recovery and seawater desalination for ship diesel engines to enhance exhaust gas purification,this study focuses on the Kincaid B&W 6L90 GE marine diesel en-gine.A high-efficiency exhaust gas purification technology integrated with seawater desalination is proposed.The principles of exhaust gas purification technology combined with seawater desalination for marine diesel engines are introduced.Theoretical design calculations for the evaporation and condensation stages of the marine diesel exhaust gas purification system integrated with seawater desalination are conducted.The heat transfer coefficients for the e-vaporation and condensation sections of the flue gas waste heat recovery desalination system were determined to be 42.29 and 1,067.42 W/(m^(2)·℃),with heat transfer areas of 517.31 m^(2) and 38.26 m^(2).The overall dimensions of this system are a diameter ofΦ6.0 m and a total height of 6.452 m.Additionally,the overall dimensions of the ship exhaust gas purification system are determined to be a diameter ofΦ4.0 m and a total height of 9.66 m,there-by finalizing the design calculations and structural layout of the system.