| 摘要:针对船舶柴油机废气CO?捕集中单乙醇胺（MEA）水溶液再生能耗高的问题，本文提出采用乙二醇（EG）作为有机溶剂形成MEA少水吸收剂。基于ASPEN HYSYS建立MAN B&W 6S35ME-B9型船用柴油机碳捕集系统模型，通过数值模拟与试验研究相结合的方法，分析乙二醇质量分数对CO?解吸能耗的影响规律。研究结果表明：当MEA水溶液在循环流量为60 m3/h、再生热负荷为9 GJ/h工况下，CO?吸收效率为77%，再生能耗为5.8 GJ/t；添加50%乙二醇形成少水吸收剂后，模拟与试验的再生能耗分别降低14.8%和11%；通过系统参数优化，在再生热负荷为6 GJ/h、吸收液循环流量为80 m3/h、再生塔操作压力0.09 MPa条件下，CO?吸收效率为78%，再生能耗可进一步降至3.85 GJ/t。研究表明，少水吸收剂能有效降低船舶碳捕集系统的再生能耗，具有工程应用潜力。 |
| 关键词: 船舶碳捕集 化学吸收法 反应动力学 少水吸收剂 能耗优化 |
|
| Optimization of Energy Consumption for Regeneration of Water-Lean Absorbent Based on Ship Carbon Capture System |
| Xi Qing,Guo Hao,Ge Dongxiao,Yang Zhiyuan,Shen Yuhang |
| Shanghai Maritime University， Shanghai 200135， China |
| Abstract:Aiming at the problem of high regeneration energy consumption of monoethanolamine （MEA）aqueous solution in the capture of ship diesel engine exhaust CO2，this paper proposes to use ethylene glycol（EG）as an organic solvent to form a water-lean MEA absorbent.A carbon capture system model for the MAN B&W 6S35ME-B9 marine diesel engine was established based on ASPEN HYSYS. Through a combination of numerical simulation and experimental research，the influence law of ethylene glycol mass fraction on the CO2 desorption energy consumption was analyzed.The research results show that：when the MEA aqueous solution is under the working conditions of a circulation flow rate of 60 m3/h and a regeneration heat load of 9 GJ/h，the CO2 absorption efficiency is 77%，and the regeneration energy consumption is 5.8 GJ/t；after adding 50% ethylene glycol to form a water-lean absorbent，the regeneration energy consumption in simulation and experiment is reduced by 14.8% and 11% respectively；through the optimization of system parameters，under the conditions of a regeneration heat load of 6 GJ/h，an absorbent circulation flow rate of 80 m3/h，and a regeneration tower operating pressure of 0.09 MPa，the CO2 absorption efficiency is 78%，and the regeneration energy consumption can be further reduced to 3.85 GJ/t.The research shows that the water-lean absorbent can effectively reduce the regeneration energy consumption of the ship carbon capture system and has engineering application potential. |
| Key words: marine carbon capture chemical absorption reaction kinetics water-lean absorbent energy consumption optimization |
