超重力气液相际传质过程中气相传质问题及强化研究

High gravity technology, as a new technology of both separation and reaction for gas-liquid mass transfer, has been payed close attention. Compare with packed column, total mass transfer coefficient in liquid phase enhanced 1-2 order of magnitude, but mass transfer coefficient in gas phase is only slightly. So, it is turn into focus of attention to intensify mass transfer in gas phase. Based on the principle of boundary-layer separation and momentum transfer, a innovation mechanism of action to intensify mass transfer in gas phase，Counter Airflow Shear Rotating Packing Bed (CAS-RPB), is created in this project. Its aim is to try to establish a new approach of improving mass transfer in gas phase by overall exploration of CAS-RPB. Air current condition in CAS-RPB will be obtained by calculating fluid software, and a physical model of gas-liquid kinetic will be set up. The change of mass transfer coefficients in gas phase with both operation and device structural parameters will be investigated by NH3-H2O experimental system. As a result of this project，it will clarify reinforcement theory of mass teansfer in gas phase on CAS-RPB by mass transfer model. This project has important academic value to explore new method , to enrich enhancement theory of gas film control, to promote technical progress for rectification and absorbtion as well as reaction.

超重力技术作为强化气液传质分离与反应的新技术得到科技工作者的广泛关注，与填料塔设备相比，液相总传质系数提高了1～2个数量级，但对气相传质系数影响略微，强化化工气液相际传质过程中气相传质问题彰显突出，成为本领域的研究热点。本项目依据边界层分离和动量传递原理， 创新提出了气流对向剪切旋转填料床（CAS-RPB）的超重力强化气膜传质机制，全面探索、研究CAS-RPB机制，建立强化气相传质的新方法。采用现代流体计算软件分析CAS-RPB中的气流场，建立气液运动的物理模型；以气膜控制的NH3-H2O体系为对象，研究气相传质系数随操作参数和结构参数的变化规律，建立传质模型，阐明强化气相传质的机理。CAS-RPB机制及方法对探索化工过程强化提供新思路，为解决气膜控制过程开辟新途径，拓展和丰富强化气膜控制过程的理论，促进精馏、吸收、反应等技术进步，具有重要的科学意义和学术价值。

本项目依据边界层分离和动量传递原理，发明了气流对向剪切旋转填料床（CAS-RPB），授权发明专利5项；全面探索了CAS-RPB强化气膜传质制机，发表学术论文6篇。采用现代流体计算软件Fluet计算分析了CAS-RPB中的气流场，建立了气液运动的物理模型，发表学术论文4篇。以气膜控制的NH3-H2O和SO2-NaOH体系，研究了CAS-RPB的气相传质系数随操作参数和结构参数的变化规律，建立了传质模型，揭示了其强化气相传质的机理，发表学术论文8篇。进行了应用研究和技术开发，发表论文17篇，出版学术专著2部。CAS-RPB机制及方法的建立对探索化工过程强化提供了新思路，为解决气膜控制过程开辟新途径，拓展和丰富强化气膜控制过程的理论，促进精馏、吸收、反应等技术进步，具有重要的科学意义和学术价值。