三相内循环气升式反应器传质反应过程动态模拟  

Dynamic simulation of mass transfer-reaction process in three-phase internal air-lift reactor

作　　者：宋梓航 蔡旺锋[1] 王燕[1] SONG Zihang;CAI Wangfeng;WANG Yan(School of Chemical Engineering and Technology,Tianjin University,Tianjin 300072,China)

机构地区：[1]天津大学化工学院,天津300072

出　　处：《化学工业与工程》2025年第1期138-147,共10页Chemical Industry and Engineering

摘　　要：三相内循环气升式反应器在污水处理、微生物培养等领域应用广泛。对三相内循环气升式反应器建立动态传质反应模型,通过模型计算得到气含率、循环液速、气相和液相中氧含量等物理量在轴向上的分布情况和随时间的变化结果。同时,计算得到了不同操作条件下的下降管与提升管气含率之比和反应器顶部气体回流比的2个值的大小,其结果分别在0.80~0.89和0.44~0.56之间。最后,利用微生物一级反应动力学方程模拟了降解苯酚的过程来验证模型的准确性,计算结果和文献中实验数据进行对比,显示了不同操作条件下模拟值与实验数据的相对误差分别为8.81%和6.86%,充分显示了模型具有很好的可靠性。The three-phase internal air-lift reactor is widely used in fields such as sewage treatment and microbial cultivation.In this paper,a dynamic mass transfer-reaction model for the three-phase internal air-lift reactor is established,the model calculates the distribution and variation of the operation parameters such as gas-holdup,circulation liquid velocity,and oxygen content in the gas and liquid phases along the axial direction.At the same time,the model calculates the ratio of gas holdup between the downcomer and the riser and the gas reflux ratio at the top of the reactor under different operating conditions,with values ranging from 0.75—0.89 and 0.44—0.52,respectively.Finally,the microbial first-order reaction kinetics equation is used to simulate the process of phenol degradation to verify the accuracy of the model.The calculated results are compared with experimental data from the literature,and the relative errors between the simulated values and experimental data under different operating conditions are shown to be 8.81%and 6.86%,respectively,which demonstrates the good reliability.

关 键 词：内循环气升式反应器 动态模拟 气相循环比 局部模型 气含率 

分 类 号：TQ052[化学工程]