摘要
为探究高压工况下,填料塔内醇胺溶液吸收高浓度(体积分数35%)CO_(2)的传热传质规律,基于双膜理论,以小型θ环填料塔实验装置为基础,建立了塔内N-甲基二乙醇胺+哌嗪(MDEA+PZ)脱碳传质模型。利用不同吸收压力下的实验数据对模型进行了修正,使模型适用于高压工况。结果表明,传质通量修正因子的引入,能够较好地解决高压工况下模型计算误差较大的问题;不同进气和溶液流量下,CO_(2)浓度场和温度场的模拟结果与实验数据基本一致;填料塔内存在快速反应区域,并且会随着气液流量变化移动。本模型可为相应特征天然气的净化提供借鉴。
In order to explore the heat and mass transfer law of high concentration(volume fraction 35%)CO_(2) absorption by alkanolamine solution in packed tower under high pressure,a mass transfer model of N-methyldiethanolamine+piperazine(MDEA+PZ)decarburization in the tower was established based on the double-film theory and a smallθ-ring packed tower experimental device.The experimental data under different absorption pressures were used to modify the model,so that the model was suitable for high pressure.The results show that the introduction of mass transfer flux correction factor can better solve the problem of large model calculation error under high pressure.The simulation results of CO_(2) concentration field and temperature field are basically consistent with the experimental data under different inlet gas and solution flow rates.There is a rapid reaction zone in the packed tower,and it will move with the change of gas and liquid flow.This model can provide reference for purification of natural gas with corresponding characteristics.
作者
花亦怀
刘云飞
王铭
桑伟
唐建峰
陈静
姚宝龙
孙培源
HUA Yihuai;LIU Yunfei;WANG Ming;SANG Wei;TANG Jianfeng;CHEN jing;YAO Baolong;SUN Peiyuan(CNOOC Gas&Power Group Research&Development Center,Beijing 100027,China;College of Pipeline and Civil Engineering,China University of Petroleum(East China),Qingdao 266580,Shandong,China;Beijing Gas and Heating Engineering Design Institute,Beijing 100032,China)
出处
《天然气化工—C1化学与化工》
CAS
北大核心
2022年第6期110-118,共9页
Natural Gas Chemical Industry
关键词
填料塔
高浓度CO_(2)
化学吸收
醇胺溶液
传质模型
packed tower
high concentration CO_(2)
chemical absorption
alkanolamine solution
mass transfer model
