Çok kademeli taşkın yatağın hidrodinamiği

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Thesis Type: Postgraduate

Institution Of The Thesis: Gazi University, Fen Bilimleri Enstitüsü, -, Turkey

Approval Date: 2005

Thesis Language: Turkish

Student: BESTE ALGÜL

Supervisor: ÖZKAN MURAT DOĞAN

Abstract:

V HYDRODYNAMICS OF MULTISTAGES SPOUTED BEDS (M.Sc. Thesis ) Beste ALGÜL GAZİ UNIVERSITY INSTITUTE OF SCIENCE AND TECHNOLOGY August, 2005 ABSTRACT Spouted beds are used for fludization of irregular shape and big size solid particles with a gas jet at the center of the bed. The result is axiaî soîid partide drculation providing good mixing İH the bed. Spouted beds have a broad area of applications; the reaction of gas - solid, drying, mixing of particles, partide coatiüg and granulation. Spouted bed was effectiveîy used for drying of gram product. in this study, hydrodynamics of multistage spouted beds and flow of solids beîween the stages were investigated. Experiments were carried out using a five - stage spouted bed column raade of piexigiass. Bird seeds (partide diameter of 2 mm and density of 1219 kg/m3) was used as solid material. The experiments were performed for different bed heights (40 - 80 mm), air flow rates and sîot widths (5 - 20 mm). Pressure drop data for each stage were obtained for increasing and decreasirag air flow rates, and for different slot widths and bed heights. Solid partieles' flow rates were measured for every stage at three different gas veîodties (0,944 m/s, 1,0384 m/s, 1,1328 m/s). Minimum spouting velocity, maximum pressure drop and spouting pressure drop were also determined. Effect of bed height and sîot width on ali hydrodynamic parameterswere specificaliy investigated. Experimental correlations were developed for minimum spouting velecity, maxinıum pressure drop, spoutingyi pressure drop and solid flow rate and compared with equations avaiable in the literatüre. Selence Code : 603 01 01 Key Words : Spouted Bed, Five - stage, Hyrodynaraics, Partide FIow Rate Page Number: 126 Adviser : Assoc. Prof. Dr. Ö. Murat DO?AN