Optimization of Draft Tube Position in a Spouted Bed Reactor using Response Surface Methodology

Elaheh Baghban, Arjomand Mehrabani-Zeinabad

Chemical Engineering Department Isfahan University of Technology Isfahan, Iran.

DOI: 10.4236/ampc.2012.24B059                

Abstract

Optimization of draft tube position in a spouted bed reactor used for treatment of wastewater containing low concentration of heavy metals is investigated in this paper. Response surface methodology is used to optimize the draft tube height, the draft tube width and the gap between the bottom of the draft tube and the inlet nozzle. It is observed that the draft tube with a height of 60 millimeter, width of 12 millimeter and the gap of 13 millimeter between its bottom and inlet nozzle, results in optimum value of minimum spouting velocity, measured 45 cubic centimeter per second (2.7 Liter per minute) .

Keywords

Spouted Bed; Draft Tube; Minimum Spouting Velocity; Response Surface Methodology

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	K. Scott, “ Journal Review. Electrochemical Methods for the Treatment of Industrial Process Streams and Effluents. Part 1: Cell Design and the Recovery of Dissolved Metals by Electrodeposition”, Developments in Chemical Engineering and Mineral Processing, Vol. 1, pp. 185-197, October 1992.
[2]	V. Jiricny, A. Roy, J. W. Evans, “Electrodeposition of Zink from Sodium Zincate/Hydroxide Electrolytes in a Spouted Bed Electrode”, Metallurgical and Materials Transactions, Vol. 31B, pp. 755-766, Aug, 2000
[3]	A. Verma, J. C. Salas-Morales, J.W. Evans, “Spouted Bed Electrowinning of Zinc: Part II. Investigations of the Dynamics of Particles in Large Thin Spouted Beds”, Metallurgical and Materials Transactions, Vol. 28B, pp. 69-79, Feb 1997
[4]	E. Piskova and L. Morl, “Fluidization regimes in different spouted bed apparatus constructions”, Chemical Engineering and Processing, Vol. 46, pp.695-702, 2007.
[5]	C. R. Duarte, V. V. Murata, A. S. Barrozo, “ Experimental and Numerical Study of Spouted Bed Fluid Dynamics”, Brazilian Journal of Chemical Engineering, Vol. 25, pp. 95-107,January-March 2008.
[6]	P. A. Shirvanian, J. M. Calo, G. Hradil, “ Numerical Simulation of Fluid-Particle Hydrodynamics in a Rectangular Spouted Vessel”; Interrnational Journal of Multiphase Flow, Vol. 32, pp. 739-753, 2006.
[7]	P.A. Shirvanian, J. M. Calo, “Hydrodynamic scaling of a rectangular spouted vessel with a draft duct”, Chemical Engineering Journal, Vol. 103, pp. 29-34, 2004
[8]	K. Kazdobin, N. Shvab, S. Tsapakh, “ Scaling-up of Fluidized Bed Electrochemical Reactors”, Chemical Engineering Journal, Vol. 79 , pp. 203-209, October 2000
[9]	K. B. Mathur., N. Epstein, “Spouted Beds”,Academic Press. Inc., 1974, pp. 15-25.
[10]	R. Saravanathamizhan, N. Mohan, N. Balasubramanian, V. Ramamurthi , C. Ahmed Basha, “ Evaluation of Electro-Oxidation of Textile Effluent Using Response Surface Method”, Clean, Vol.35, pp. 355-361, July 2007
[11]	D. Granato, G. F. Branco, V. M. de Araijo Calado, “ Experimental Design and Application of Response Surface Methodology for Process Modelling and Optimization: A Review”, Food Research International, 2001.
[12]	B. K. Korbahti, A. Tanyolac. “Electrochemical Treatment of Simulated Textile Wastewater with Industrial Components and Levafix Blue CA Reactive Dye: Optimization through Response Surface Methodology”. Journal of Hazardous Materials, Vol. 151, pp. 422-431, 2008.
[13]	B. K. Korbahti, N. Aktas, A. Tanyolac,” Optimization of Electrochemical Treatment of Industrial Paint Wasteater with Response Surface Methodology’, Journal of Hazardous Materials, Vol. 148, pp. 83-90, 2008?