膜科学与技术

陶瓷膜接触器吸收氮氧化物传质过程模拟研究

作者：孙海龙

单位：中国石化扬子石油化工有限公司南京研究院，南京 210048

关键词：陶瓷膜；膜接触器；脱硝；传质模型；化学吸收

出版年,卷(期):页码： 2022,42(4):122-129

摘要：

利用陶瓷膜接触器进行膜吸收是处理氮氧化物最有效的方法之一，然而，针对吸收氮氧化物的膜接触器传质模型几乎没有。通过模拟NO的对流、扩散与反应过程，建立了以NaClO2溶液吸收NO的陶瓷膜接触器传质模型，准确预测了陶瓷膜接触器膜内各点的浓度分布与阻力分布。同时，利用建立的模型分析了不同气体流速、NO进口含量、吸收剂的流速、浓度、pH以及吸收温度对陶瓷膜接触器脱硝效果的影响，优化了膜接触器的操作条件，得到了膜接触器最大的通量和吸收液的有效浓度。通过本研究，利用传质模型可以对膜接触器脱硝效果进行预测，从而为膜接触器脱硝过程的设计与优化提供理论支持。

Membrane absorption of nitrogen oxides by ceramic membrane contactors is one of the most effective methods. However, there is almost no mass transfer model for membrane contactor that absorb nitrogen oxides. In this paper, the convection, diffusion and reaction process of NO are simulated. The mass transfer model of the ceramic membrane contactor that absorbs NO with NaClO2 solution is established. The concentration and resistance distribution in the ceramic membrane contactor membrane are accurately predicted. At the same time, the influence of gas flow rate, NO inlet content, absorbent flow rate, concentration, pH and absorption temperature on the NO removal efficiency of the ceramic membrane contactor were analyzed. The operating conditions of the membrane absorption were optimized. The maximum NO flux of the membrane contactor was obtained. Finally, the mass transfer model predicts the NO removal efficiency of the membrane contactor. The theoretical support for the design and optimization of the membrane contactor's NO removal s is proposed.

孙海龙(1982-)，男，重庆市人，博士，高级工程师，研究方向为化工分离过程

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