Study of Laboratory batch rotary Dryer performance for reducing broken grains

Gharnasi Gharavi, Omar and Afkari-Sayyah, Amir Hossein and Shams-Abadi, HoseinAli and Askari Asli-Ardeh, Ezzatollah and Rasekh, Mansour (2015) Study of Laboratory batch rotary Dryer performance for reducing broken grains. Masters thesis, University of Mohaghegh Ardabili.

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Abstract

Including the problems of drying in paddy factory lack of uniformity drying in the paddy rice that creates stress temperature and moisture and thus will cause fractures in the later stages. The purpose of this research was to develop a performance history rice healthy white paddy drying in the shortest time. In this study, to reduce losses and increase the drying rate of a rotary dryer machine utilizing the innovative laboratory. Response surface methods and central composite design software for modeling and design expert was used to obtain the optimum condition. Independent variables include temperature (40 to 80 ° C), rotating cylinder rotation speed (2 to 10 rpm) and the full cylinder (25 to 66%) was rotary dryer. The results showed significant effects of the variables of interest on the amount of waste and the temperature has the greatest impact on the amount of waste and drying times. Also decreased with increasing rotation speed drying time. The results of the optimization process with a minimum percentage of breakage and drying time in the inlet air temperature 56.53 ° C, the speed of rotation of the cylinder 10 RPM and Miran full cylinder 54.20 % was found that in these conditions of the fracture prediction model 28.64 % and drying of time 67.06 minutes.

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