Analysis on the Influence of Blade Distance of Impeller on Mixing Characteristics of Rare Earth Stirred Tank with Draft Tube
Received:June 14, 2019  Revised:July 04, 2019
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DOI:doi:10.3969/j.issn.1671-9492.2019.06.016
KeyWord:导流筒搅拌槽;搅拌桨叶底距;数值模拟;Fluent软件
        
AuthorInstitution
YAN Guang-li School of Economics and Management,Jiangxi University of Science and Technology,Ganzhou, China
FENG Yu-sheng School of Economics and Management,Jiangxi University of Science and Technology,Ganzhou, China
PANG Qi-shou School of Mechanical and Engineering,Jiangxi University of Science and Technology
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Abstract:
      The distance between impeller blades and the bottom of the tank has a crucial influence on the mixing characteristics of rare earth stirred tank with draft tube. In order to obtain the rule of the influence of blade bottom pitch on the mixing characteristics of rare earth stirred tank with draft tube, this paper takes the data of a rare earth enterprise in southern Jiangxi Province whose volume is 10 m3 as the model reference, establishes a three-dimensional model of the draft tube stirred tank and the stirred impeller by using Solidworks software, and uses Fluent fluid simulation software to process the data, and chooses four groups of blade pitch to the bottom of the tank. The experimental data (c=450,500,550,600 mm) were used to simulate the mixing process of rare earth mixing tank with glycerol aqueous solution as carrier. Then the mixing characteristics of the mixing tank with the guide tube were analyzed and evaluated based on the parameters of time-averaged velocity distribution, velocity, moment and stirring power. The simulation results show that when the distance between the blades of the impeller and the bottom of the tank is c=550 mm, the axial circulation ability of the material and liquid in the stirred tank with draft tube is the strongest, and the overall flow field distribution of the stirred tank is also the best. The stirring characteristics of different blade spacing at the bottom of the tank were tested in the field. The simulation results were compared with the field test results, and the high consistency between the field test results and the simulation analysis conclusions was verified. The stirring moment is 6.56 N?m and the stirring power is 8239 W when the distance between the blade and the bottom of the tank is 550 mm. The research results will provide theoretical and practical reference for the design and installation of the internal structure of the mixing tank with draft tube.
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