祝洪青,郭锋,曲江源

• 1:国核电力规划设计研究院有限公司

摘要(Abstract)：

以工业规模喷淋塔内醇胺溶液吸收CO_2为研究对象，基于欧拉-拉格朗日方法建立了烟气-液滴气液两相流动、相间传热传质和液相化学反应耦合的计算流体力学（CFD）模型。通过与乙醇胺（MEA）溶液吸收CO_2实验数据对比验证了CFD模型可靠性，在此基础上分析了CO_2吸收过程所伴随热质交换和化学反应的基本规律，以及吸收剂化学组成、气液两相流动特性和操作压力对喷淋塔内CO_2脱除效率的影响。模拟结果表明：随塔体高度增加烟气中CO_2体积分数下降，而烟温和水蒸气体积分数均呈先上升后下降趋势；当贫液中CO_2负荷由0.1增至0.4，塔内烟温最大值由70℃降至54℃，贫液负荷大于0.25时喷淋塔脱碳效率显著下降；表观气速大于2.5m/s时烟气停留时间显著缩短且液相侧传质系数减小，传质比表面积的增加对CO_2吸收效率提升作用减弱；喷淋塔操作压力由101 k Pa降至70 k Pa,CO_2脱除效率降低约15.9百分点。

关键词(KeyWords)： 燃煤机组;碳捕集;气液两相流;化学吸收;数值模拟

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 祝洪青,郭锋,曲江源

DOI: 10.19666/j.rlfd.202412268

参考文献(References)：

• [1]中华人民共和国国家统计局.中国统计年鉴[M].北京:中国统计出版社, 2023:1.National Bureau of Statistics of China. China Statistical Yearbook[M]. Beijing:China Statistics Press, 2023:1.
• [2]严晓辉,杨芊,高丹,等.我国煤炭清洁高效转化发展研究[J].中国工程科学, 2022, 24(6):19-25.YAN Xiaohui, YANG Qian, GAO Dan, et al.Development of clean and efficient coal transformation in China[J]. Strategic Study of CAE, 2022, 24(6):19-25.
• [3]谢克昌.面向2035年我国能源发展的思考与建议[J].中国工程科学, 2022, 24(6):1-7.XIE Kechang. China’s energy development for 2035:strategic thinking and suggestions[J]. Strategic Study of CAE, 2022, 24(6):1-7.
• [4] GüR T M. Carbon dioxide emissions, capture, storage and utilization:review of materials, processes and technologies[J]. Progress in Energy and Combustion Science, 2022, 89:100965.
• [5]吴其荣,陶建国,范宝成.燃煤电厂开展大规模碳捕集的技术路线选择及经济敏感性分析[J].热力发电,2022, 51(10):28-34.WU Qirong, TAO Jianguo, FAN Baocheng, et al.Technical route selection and economic analysis of large-scale carbon capture device in coal-fired power plant[J]. Thermal Power Generation, 2022, 51(10):28-34.
• [6] STEC M, TATARCZUK A, WI?C?AW-SOLNY L, et al.Pilot plant results for advanced CO2 capture process using amine scrubbing at the Jaworzno II Power Plant in Poland[J]. Fuel, 2015, 151:50-56.
• [7]王煦清,严圣林,朱礼涛,等.填料塔中有机胺吸收CO2气液传质的研究进展[J].化工学报, 2023, 74(1):237-256.WANG Xuqing, YAN Shenglin, ZHU Litao, et al.Research progress on the mass transfer process of CO absorption by amines in a packed column[J]. CIESC Journal, 2023, 74(1):237-256.
• [8]李宁,陈义峰,叶南南,等. CO2在单乙醇胺溶液吸收塔中的传质阻力模拟研究[J].南京工业大学学报(自然科学版), 2022, 44,(1):28-35.LI Ning, CHEN Yifeng, YE Nannan, et al. Simulation study on the mass transfer resistance of CO2 in the monoethanolamine aqueous solution absorption tower[J].Journal of Nanjing Tech University(Natural Science Edition), 2022, 44,(1):28-35.
• [9] WANG P H, DAI G C. Synergistic effect between spraying layers on the performance of the WFGD spray column[J]. Asia-Pacific Journal of Chemical Engineering, 2018, 13(6):e2266.
• [10] WANG H M, LI Q H, YOU C F, et al. An empirical model of absorption of nitric oxide with ammoniacal cobalt(II)solutions in a spray tower[J]. Chemical Engineering Research and Design, 2019, 148:240-250.
• [11] TAMHANKAR Y, KING B, WHITELEY J, et al. Spray absorption of CO2 into monoethanolamine:mass transfer coefficients, dropsize, and planar surface area[J].Chemical Engineering Research and Design, 2015, 104,376-389.
• [12] KUNTZ J, AROONWILAS A. Performance of spray column for CO2 capture application[J]. Industrial&Engineering Chemistry Research, 2008, 47(1):145-153.
• [13] KOLLER M, WAPPEL D, TROFAIER N, et al. Test results of CO2 spray scrubbing with Monoethanolamine[J]. Energy Procedia, 2011, 4:1777-1782.
• [14] SEYBOTH O, ZIMMERMANN S, HEIDEL B, et al.Development of a spray scrubbing process for post combustion CO2 capture with amine based solvents[J].Energy Procedia, 2014, 63:1667-1677.
• [15] ZHAO B T, SU Y X, CUI G M. Post-combustion CO2capture with ammonia by vortex flow-based multistage spraying:process intensification and performance characteristics[J]. Energy, 2016, 102:106-117.
• [16] XU Y, CHEN X, ZHAO Y L, et al. Modeling and analysis of CO2 capture by aqueous ammonia+piperazine blended solution in a spray column[J]. Separation and Purification Technology, 2021, 267:118655.
• [17] XU Y, CHANG W J, CHEN X L, et al. CFD modeling of MEA-based CO2 spray scrubbing with computationaleffective interphase mass transfer description[J].Chemical Engineering Research and Design, 2023, 189:606-618.
• [18] XU Y, CHANG W J, CHEN X L, et al. CFD investigation of post-combustion CO2 capture using an industrial spray tower:Regulation effects of spray schemes[J]. Chemical Engineering Science, 2024, 293:120053.
• [19] LV B H, GUO B S, ZHOU Z M, et al. Mechanisms of CO2 capture into monoethanolamine solution with different CO2 loading during the absorption/desorption processes[J]. Environmental Science&Technology,2015, 49(17):10728-10735.
• [20] HIKITA H, ASAI S, ISHIKAWA H, et al. The kinetics of reactions of carbon dioxide with monoethanolamine,diethanolamine and triethanolamine by a rapid mixing method[J]. Chemical Engineering Journal, 1977, 13(1):7-12.