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NUMERICAL STUDY ON THE OPTIMAL DESIGN OF SPRAY SYSTEM IN PACKED BED SCRUBBER  

Ko, S.W. (중앙대학교 대학원 기계공학과)
Ro, K.C. (중앙대학교 기계공학부)
Ryou, H.S. (중앙대학교 기계공학부)
Publication Information
Journal of computational fluids engineering / v.12, no.1, 2007 , pp. 28-34 More about this Journal
Abstract
This study evaluates the performance of the packed bed scrubber and proposes the optimization of spray system for improvements of collection efficiency. The packed bed scrubber is used primarily in the semiconductor manufacturing process. The mean diameter of entering solid particles in scrubber is the submicron. The impaction between water droplets and solid particles is an important factor in removing the solid particles. Thus, the coverage area of spray system influences on the collection efficiency. The collection efficiency of a single droplet is calculated through the mathematical model and numerical calculations are performed for coverage area for each nozzle type (Droplet diameters: 500, 319.5, $289.5{\mu}m$) and injected directions (0, 15, $30^{\circ}$). In case of nozzle type 3, the collection efficiency of a single droplet is highest but the collection efficiency of spray system has lowest value because the ratio of flow rate between the gas and water is below 0.1. The results show the coverage area ratio is about 85% in the case of nozzle type 3 and downward sirection $15^{\circ}$. It was shown that a coverage area increase by two times than an existing spray system. In simulation of demister, collection efficiency by demister is predicted about 80% and the pressure drop in demister is below 3.5 Pa.
Keywords
Collection Efficiency; Spray System; Coverage Area;
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1 A. Jaworek, W. Balachandran, M. Lackowski, J. Kulon, A. Krupa, 2006, "Multi-nozzle electro spray system for gas cleaning processes," Journal of ELECTROSTATTICS, Vol. 64, pp.194-202   DOI   ScienceOn
2 Seymour Calvert, Harold M. Englund, 1984, "HANDBOOK OF AIR POLLUTION TECHNOLOGY," A Wiley-Interscience Publication
3 Peter J. O'Rourke, 1981, "Collecive Drop Effects on Vaporizing Liqid Sprays," Ph.D. Thesis, Mechanical and Aerospace Engineering, Priston University, USA
4 Kyung-Hoon Yoo, Hee-Hwan Roh, Enu-Soo Choi, Jong-Kyoon Kim, 2003, "An Experimental on the Particle Collection characcteristics in a Packed Wet Scrubber," Journal of Air-Conditioning and Refrigeration, Vol.15, pp. 305-311
5 Reitz, R.D., and Diwakar, R. 1986. "Effect of drop breakup on fuel sprays," SAE Technical Paper Series 860469
6 Peter J. O'Rourke and Anthony A. Amsden, 1987, "The Tab Method for Numerical Calculation of Spray Dropelt Breakup," Society of Automotive Engineers, SAE872089
7 A. Haider and O. Levenspiel, 1989, "Drag Coefficient and Terminal Velocity of Spherical and Nonspherical Particles," Powder Technology, Vol.58, pp.63-70   DOI   ScienceOn
8 R. D. Reitz. 1987, "Mechanisms of Atomization Processes in High-Pressure Vaporizing Sprays", Atomization and Spray Technology, Vol.3, pp.309-337
9 Y. Bozorgi, P. Keshavarz, M. Taheri, J. Fathikaljahi, 2006, "Simulation of a spray scrubber performance with Eulerian/Lagrangian approach in the aerosol removing process," Journal of Hazardous Materials, Vol.137, pp. 509-517   DOI   ScienceOn
10 G. I. Taylor, 1963, "The Shape and Acceleration of a Drop in a High Speed Air Stream," Technical report, In the Scientific Papers of G. I. Taylor, ed., G. K. Batchelor
11 B.E. Launder and D.B. Spalding, 1972, "Lectures in Mathematical Models of Turbulence," Academic Press, London, England