Fluid Differential Agitators

Authors: Saeed Asiri

Abstract:

This research is to design and implement a new kind of agitators called differential agitator. The Differential Agitator is an electro- mechanic set consists of two shafts. The first shaft is the bearing axis while the second shaft is the axis of the quartet upper bearing impellers group and the triple lower group which are called as agitating group. The agitating group is located inside a cylindrical container equipped especially to contain square directors for the liquid entrance and square directors called fixing group for the liquid exit. The fixing group is installed containing the agitating group inside any tank whether from upper or lower position. The agitating process occurs through the agitating group bearing causing a lower pressure over the upper group leading to withdrawing the liquid from the square directors of the liquid entering and consequently the liquid moves to the denser place under the quartet upper group. Then, the liquid moves to the so high pressure area under the agitating group causing the liquid to exit from the square directors in the bottom of the container. For improving efficiency, parametric study and shape optimization has been carried out. A numerical analysis, manufacturing and laboratory experiments were conducted to design and implement the differential agitator. Knowing the material prosperities and the loading conditions, the FEM using ANSYS11 was used to get the optimum design of the geometrical parameters of the differential agitator elements while the experimental test was performed to validate the advantages of the differential agitators to give a high agitation performance of lime in the water as an example. In addition, the experimental work has been done to express the internal container shape in the agitation efficiency. The study ended up with conclusions to maximize agitator performance and optimize the geometrical parameters to be used for manufacturing the differential agitator

Keywords: Differential Agitators, Parametric Optimization, Shape Optimization, Agitation, FEM, ANSYS11.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1062668

References:

[1] Asiri, Saeed, "Differential Agitator", KACST patent, No. 06270232, (2010).
[2] Polasek P and MUTL "Acceleration of gravity separation process. Proc. Filtech Europa - Int. Conf. on Filtration and Separation Technology".October, D├╝sseldorf, Germany (2003).
[3] Weber Arthur P, "Continuous flow reactor for high viscosity material" betiilellem steel corp, (1977).
[4] Weetman Ronald J and HowkRichad A, " Mixer for axial flow on a nonuniform flow field" gen signal corp. US (1988).
[5] Inoue Takao and Saito Makoto, "mixing device and method" kajimacorp JP (1999).
[6] Hockmeyer and Herman H, "Apparatus for dispersing solid constituents into a liquid" hockmeyer equipment corp. (2006).
[7] Hereit F, Mutl S and Vagner V "The formation of separable suspensions and the methods of its assessment". Proc. Int. Conf. IWA. Paris, France. 0095-0099. (1983).
[8] Yinyu Hu, Zhe Liu, Jichu Yang, Yong Jin and Yi Cheng , "Millisecond mixing of liquids using a novel jet nozzle, Department of Chemical Engineering", Tsinghua University, Beijing 100084, PR China, November (2008).
[9] Richard V. Calabrese, Michael K. Francis,Ved P. Mishra and SupathomPhongikaroon ,"Measurement and Analysis of Drop Size in a Batch Rotor Stator Mixer" University of Maryland , MD 20742-2111 USA (2011).
[10] Mitsuaki Funakoshi , "Chaotic mixing and mixing efficiency in a short time" , Department of Applied Analysis and Complex Dynamical Systems, Graduate School of Informatics, Kyoto University, Yoshida- Honmachi, Sakyo-ku, Kyoto 606-8501, Japan , May (2007).
[11] SimoSiiriä , and JoukoYliruusia , "Determining a value for mixing: Mixing degree" , University of Helsinki, Division of Pharmaceutical Technology, Finland , August (2009).
[12] Polasek P and Mutl S "Acceleration of gravity separation process". J. Filtr. 5 (1) 33-39 (2005).
[13] Samaras, K.; Mavros, P.; Zamboulis, D. "Effect of continuous feed stream and agitator type on CFSTR mixing state". Ind. Eng. Chem. Res. (2006).
[14] F. Moretti, D. Melideo, F. D-Auria, "CFX simulations of ROCOM experiments", TACIS Project R2.02/02, Working Document TP-08- 01(06), December (2006).
[15] C. Leguay, G. OzcanTaskin and C. D. Rielly "Gas liquid mass transfer in a vortex ingesting, agitated draft tube reactor" University of Cambridge CB2 3RA UK (2011).
[16] A. Seidell, W. F. Linke, Van Nostrand "Solubility of Inorganic and Metalorganic Compounds - A Compilation of Solubility Data from the Periodical Literature" Van Nostrand (Publisher), (1953).
[17] D. S. Dickey and J. B. Fasano" Mechanical Design of Mixing equipment" ,(2004).
[18] ANSYS11 Software program, ┬®Ansys, Inc., Canonsburg, PA USA, (2011).