Journal of Chemical and Pharmaceutical Research (ISSN : 0975-7384)

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Original Articles: 2015 Vol: 7 Issue: 6

Analysis of moisture content of pulses pellets using fluidized bed dryer


Fluidized is formed when solid particulate substance (usually present in a holding vessel) is placed under appropriate conditions to cause the solid/fluid mixture to behave as a fluid. This is usually possible by the introduction of pressurized fluid through the particulate medium. Fluidized bed dryer are primarily used in almost all chemical, pharmaceutical, food, dyestuff and other process industries to dry materials by fluidization with hot and/ or dehumidification air, which create a turbulence in the wet product (not totally liquid) while flowing through it. It is gives best result for powders, granules, agglomerates, and pellets with an average particle size between 50 and 5,000 microns. Very fine, light powders or highly elongated particles may require vibration for successful fluid bed drying. It is operated when moist material is feed onto a shaking perforated steel/glass bed through which the drying air flows. ‘Fluidizes’, the bed of material allowing intimate contact with each and every particle. On the introduction of air, shaking will occurs to the total length of the dryer bed. Moisture is removed by the flow of hot air throughout the bed having different type of grams. Air flow is controlled along the length of the dryer to maximize fluidization. After the grams moisture removed it will send to the cooling zone where hot air will be replaced by the cool ambient air, which will reduce the (desired) product temperature. The drying rate increases as increasing the velocity of the drying air, while decreases with increases solids holdup. This article deals with the study of initial and final moisture content, temperature and weight of grams or moisture content at different intervals, pressures and comparison between all the three pulses moisture content using fluidized bed dryer of split pea gram, Split Bengal gram, and Split Red gram pellets.