摘要
利用Fluent软件对氨水板式精馏塔内气液两相流和添加纳米颗粒后的气液固三相流进行数值模拟,研究不同变量对氨水精馏的影响。结果表明,入口气速较小时,气液间物质传递效果较好,精馏过程较为理想;气速较大时,气液两相混合不均匀,出口氨气体积分数波动较大。改变初始氨气体积分数后,出口氨气体积分数显著提升。加入不同质量分数的纳米颗粒后,出口氨气体积分数随时间变化趋势几乎一致,均为短暂波动后上涨并趋于稳定;纳米颗粒质量分数过高会对精馏过程造成一定负面影响。
This paper presents a numerical simulation using Fluent software to study the gas-liquid two-phase flow and the gas-liquid-solid three-phase flow after adding nanoparticles in the ammonia water plate distillation column to find the influence of different variables on ammonia water distillation.It is found that when the inlet gas velocity is relatively small,the mass transfer effect between gas and liquid phases is better and the distillation process is more ideal.At higher gas velocities,the gas-liquid mixture becomes uneven,and the volume fraction of ammonia gas at the outlet fluctuates significantly.Moreover,after changing the initial ammonia volume fraction,the outlet ammonia volume fraction increases significantly.The impact of adding different mass concentrations of nanoparticles is studied.After the addition of nanoparticles with different mass fractions,the volume fraction of exported ammonia gas shows almost the same trend over time,which increases after a short fluctuation and then tends to be stable.Additionally,an excessively high mass fraction of nanoparticles will have a certain negative impact on the distillation process.
作者
宋金蔚
李龙
袁清
江巍雪
李彦军
SONG Jinwei;LI Long;YUAN Qing;JIANG Weixue;LI Yanjun(School of Electrical and Energy Engineering,Yangzhou University,Yangzhou 225009,China;Sinopec Petrochemical Research Institute Co.,Ltd.,Beijing 100083,China;Jiangsu Institute of Product Quality Supervision and Inspection,Nanjing 210007,China)
出处
《扬州大学学报(自然科学版)》
2025年第3期61-69,共9页
Journal of Yangzhou University:Natural Science Edition
基金
低品位能源利用技术及系统教育部重点实验室开放基金资助项目(LLEUTS-202406)
江苏省高等学校基础科学(自然科学)研究面上资助项目(24KJB470030)
炼油工艺与催化剂国家工程研究中心(中石化石油化工科学研究院有限公司)开放课题资助项目(36800000-23-ZC0609-0002).
关键词
纳米颗粒
氨水
精馏
吸收式制冷
热质传递
nanoparticles
ammonia water
distillation
absorption refrigeration
heat and mass transfer
