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过程工程学报 ›› 2023, Vol. 23 ›› Issue (7): 1035-1041.DOI: 10.12034/j.issn.1009-606X.222273

• 研究论文 • 上一篇    下一篇

转盘反应器螺旋波流型微混合性能研究

顾成俊1， 孙程1， 王东祥1,2*   

  1. 1. 江南大学机械工程学院，江苏 无锡 214122 2. 江苏省食品先进制造装备技术重点实验室，江苏 无锡 214122
  • 收稿日期:2022-07-25 修回日期:2022-11-18 出版日期:2023-07-28 发布日期:2023-07-28
  • 通讯作者: 王东祥 dxwang@jiangnan.edn.cn
  • 基金资助:
    喷动流化床不规则宽筛分颗粒非均匀气固流介尺度结构与曳力机制研究

Study of micromixing performance of a spinning disk reactor under spiral flow type

Chengjun GU1,  Cheng SUN1,  Dongxiang WANG1,2*   

  1. 1. School of Mechanical Engineering, Jiangnan University, Wuxi, Jiangsu 214122, China 2. Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment & Technology, Wuxi, Jiangsu 214122, China
  • Received:2022-07-25 Revised:2022-11-18 Online:2023-07-28 Published:2023-07-28

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摘要： 转盘反应器广泛应用于处理废水、合成纳米粒子及光催化反应等微观混合的过程强化中，其表面液膜的流型转变对微观混合性能有重要影响。本实验通过改变转速和流量研究了转盘表面液膜的流型转变规律，将流型初步分为未铺满(U)、螺旋波流型、过渡流(TS)、不规则流(I)和反螺旋波(RS)，通过流型之间的对比发现螺旋波的变化规律并得出螺旋波流型的存在范围。结合转盘反应器表面流体流动规律，采用碘化物-碘酸盐反应体系，以离集指数(XS)表征微观混合性能，在螺旋波流型下对转盘反应器的微观混合性能进行了研究，探讨了转盘转速、流量、黏度、流量比、H+浓度等因素对转盘反应器微观混合效果的影响规律。转速增大对微观混合性能的提升有限，当转速增大至一定值(ω=125.6 rad/s)时，继续提升转速对微观混合性能的提升不明显。降低液体的黏度和流量比、降低H+浓度，均有利于提高反应器的微观混合性能。研究结果为转盘反应器在微观混合反应中的应用及优化提供了参考。

关键词: 流体力学, 模型, 微观混合, 流型, 转盘反应器

Abstract: Spinning disc reactors are widely used in the process of intensification of micromixing such as the treatment of wastewater, synthesis of nanoparticles, and photocatalytic reactions, and the flow type transition of its surface liquid film has an important influence on the micromixing performance. The flow type transition of the surface liquid film of the disc was investigated by changing the rotational speed and flow rate, and the flow patterns were initially classified into unsteady (U), spiral flow type, transitional wave (TS), irregular wave (I) and reverse spiral wave (RS), and the regularity of the spiral wave was found by comparing the flow types with each other and deriving the existence range of the spiral flow type. The micromixing performance of the spinning disc reactor was investigated under the spiral flow type by using the iodide-iodate reaction system to characterize the microscopic mixing performance with the dissociation index (XS), and the influence of the disc rotational speed, flow rate, viscosity, flow ratio and H+ concentration on the micromixing effect of the spinning disc reactor was investigated. The improvement of micromixing performance was limited by increasing the rotational speed, and when the rotational speed increased to a certain value (ω=125.6 rad/s), the improvement of micromixing performance was limited by continuing to increase the rotational speed. Decreasing the viscosity of the liquid, decreasing the flow ratio of the liquid, and decreasing the H+ concentration were all beneficial to improve the micromixing performance of the reactor. The results of the study provide a reference for the application and optimization of the spinning disc reactor in micromixing reactions.

Key words: fluid mechanics, model, micromixing, flow type, spinning disk reactor