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浙江大学学报(工学版)
浙江大学学报(工学版)  2017, Vol. 51 Issue (7): 1368-1373    DOI: 10.3785/j.issn.1008-973X.2017.07.014
机械与能源工程     
错位Rushton桨气液分散特性和传质性能实验研究
冉绍辉1,2, 周慎杰1,2, 杨锋苓1,2, 李勃3
1. 山东大学 机械工程学院, 山东 济南 250061;
2. 山东大学 高效洁净机械制造教育部重点实验室, 山东 济南 250061;
3. 国网山东省电力公司经济技术研究院, 山东 济南 250061
Experimental study on gas-liquid dispersion and mass transfer of dislocated-blade Rushton impeller
RAN Shao-hui1,2, ZHOU Shen-jie1,2, YANG Feng-ling1,2, LI Bo3
1. School of Mechanical Engineering, Shandong University, Jinan 250061, China;
2. Key Laboratory of High- Efficiency and Clean Mechanical Manufacture of Ministry of Education, Shandong University, Jinan 250061, China;
3. Economic Technology Research Institute, State Grid Shandong Electric Power Company, Jinan 250061, China
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摘要：

为了强化标准Rushton桨的气液搅拌性能，设计错位Rushton桨.通过气液搅拌实验，分析不同搅拌转速和通气流量条件下，两种搅拌桨的气液分散特性、传质性能和通气搅拌功率.采用流场可视化技术，观察搅拌槽内气泡分布状态.利用图像处理技术获取气泡尺寸，使用亚硫酸盐氧化法测试气液间氧体积传质系数.研究结果表明，与标准桨相比，错位桨轴向搅拌范围大，搅拌槽内的气泡分布均匀，气泡尺寸较小.在一定操作范围内，使用错位桨可以有效地提高气液传质速率，加快气体溶解速度.在相同的操作条件下，错位桨搅拌功率略低，通气后的功率下降幅度稍小，载气性能强，更适用于气液搅拌操作.
Abstract:

The dislocated-blade Rushton impeller was designed in order to strengthen the performance of gas-liquid mixing of the standard Rushton paddle. The gas-liquid dispersion characteristics, mass transfer properties and gassed power consumption of those two impellers were investigated by gas-liquid stirring experiment under the condition of different stirring speed and air-flow rates. Bubble dispersion state in the stirring tank was observed by using visualization technology. The bubble diameter was obtained by the image processing method. The sodium sulfite test method was used to calculate the oxygen volumetric mass transfer coefficient. Results indicate that compared with the standard Rushton impeller, the areas in the axial direction influenced by the dislocated-blade Rushton impeller are broader, the bubble distribution in the stirring tank is more uniform and the bubble diameter is apparently smaller. In the certain range of control condition, the rates of mass transfer and gas dissolving are effectively improved by using the dislocated-blade impeller. At the same conditions, the power consumption and the aerated power drop after gassing of the dislocated-blade impeller are small. The performance of the carrier gas ability of the dislocated-blade impeller is strong, so it is more suitable to be applied to the gas-liquid stirring operation.
收稿日期: 2016-03-15 出版日期: 2017-07-08
CLC:  TQ027  
基金资助:

国家自然科学基金资助项目（21306105）
通讯作者: 周慎杰,男,教授.ORCID:0000-0002-9124-6270.     E-mail: zhousj@sdu.edu.cn
作者简介: 冉绍辉(1991—),男,硕士生,从事气液搅拌的研究.ORCID:0000-0002-2080-284X.E-mail:grsh2016@163.com
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引用本文:

冉绍辉, 周慎杰, 杨锋苓, 李勃. 错位Rushton桨气液分散特性和传质性能实验研究[J]. 浙江大学学报(工学版), 2017, 51(7): 1368-1373.

RAN Shao-hui, ZHOU Shen-jie, YANG Feng-ling, LI Bo. Experimental study on gas-liquid dispersion and mass transfer of dislocated-blade Rushton impeller. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 2017, 51(7): 1368-1373.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2017.07.014    或    http://www.zjujournals.com/eng/CN/Y2017/V51/I7/1368

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