Abstract: The ship 6135 decarbonization tower based on quick and effective effect can reduce the ship CO₂ emissions， which becomes the current research focus of ship CO₂ emission reduction. CO₂ emission requirements of ships in Annex VI of《MARPOL 73/78》Convention are taken as the target， the capture of CO₂ from ship’s emission is studied by using NaOH solution. After the study of the gas-liquid two-phase mass transfer of NaOH solution and CO₂， the performance optimization of the existing decarburization tower is researched by the method of numerical simulation and experimental research. The effects of the entrance form and the angle of exhaust gas intake， the spray cone angle and the layout of nozzle on decarburization efficiency of decarburization tower are optimized. The results show that the entrance of the exhaust gas is in the form of cut in intake， the entrance angle is 15°， the nozzle spray cone angle is 90°，and the top nozzle is rearranged to spray upward， and the height is at the same level with the middle nozzle，the decarburization efficiency of the decarburization tower is improved by 4.42%. The numerical simulation results are in good agreement with the test results.

Key words: Ship decarbonization;Decarburization tower;Decarburization efficiency;Numerical simulation;Performance optimization

摘要： 基于船用6135型脱碳塔能够快速、有效地降低船舶CO₂排放，已成为当前船舶碳减排的研究热点。以《MARPOL73/78公约》附则VI关于船舶CO₂的排放要求为目标，采用NaOH溶液对船舶尾气中的CO₂进行捕集。在研究了NaOH溶液与CO₂气液两相传质的基础上，通过数值模拟与实验相结合的方法对船用脱碳塔性能进行优化。本文分别研究了脱碳塔的烟气进气入口形式、入口倾斜角度、喷嘴喷雾锥角与喷嘴的布置方式改变对脱碳塔脱碳效率的影响。研究结果表明，烟气进气入口形式为切入式进气、入口倾斜角度为15°、喷嘴喷雾锥角为90°、最上部的喷嘴向上喷射且高度与中部喷嘴位于同一水平面时，脱碳塔的脱碳效率能够提高4.42%，数值模拟结果与实验结果较吻合。

关键词: 船舶脱碳;脱碳塔;脱碳效率;数值模拟;性能优化