f3-2 - CHE 309 F3 FLUIDIZED BED Prepared For : Mr....

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CHE 309 F3 FLUIDIZED BED Prepared For : Mr. Al-Harthi Done By : Yaser Fallatah ID # :985279 Partner # 1: Al-Omir ID # 986401 Performance Date : 22 -12-2002 Submission Date : 12-1-2003 Abstract :
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In this report , an experiment about measuring minimum fluidization velocity and the sand particles diameter in a bed was discussed.In order to calculate the diameter , the minimum fluidization velocity must be found.Air flowing from a compressor is passed through the fluidised sand bed .Pressure drop was measured at different flow rates . Graphically,the minimum fluidization velocity was .0566 m/swhile .28mm was found to be the average diameter of sand particles with an error percentage of 92%,reasons for high error percentage will be discussed in the report . Introduction: Fluidized bed are commonly used in chemical industries.The main purpose to use them is to increase both the surface area and the contact time between the solid and the fluid.In our experiment the fluidized bed is built from two opposite glass walls sealed and filled with sand .At the bottom , a compressor is connected and the air flow upwards ,the pressure drop is measured by a connected rotameter,also,the bed height must be noted down for each run. Theoretical Background: We assume laminar flow in case of very tiny particles so Ergun equation can be used: ƒ = 150/(Rep) Experimentally,it was found that a proportional relation exists between flow rate and pressure drop.practical values can be obtained from the next equation as long as Rep<10:
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This note was uploaded on 12/30/2010 for the course CHEMICAL E CHE 309 taught by Professor M.elgaily during the Fall '09 term at King Fahd University of Petroleum & Minerals.

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f3-2 - CHE 309 F3 FLUIDIZED BED Prepared For : Mr....

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