Prototype and commercialization of fluidized bed paddy dryer
1995
Somchat Sophonronnarit | Muttafa Yapha | Somkiat Pratyawarakon (King Mongkut's Inst. of Technology Thonburi, Bangkok, (Thailand). School of Energy and Materials Members of School Committee)
Objective of this research is to design and test a prototype, 0.82 ton capacity, fluidized bed high moisture paddy dryer. Exhausted air is partially recycled. Experimental results showed that the unit operated efficiently and yielded high product quality in terms of head yield and whiteness. In reducing the moisture content from 45 percent to 24 percent dry-basis using air temperature of 100-120 deg C, fraction of air recycled of 66 percent specific air flow rate of 0.05 kg/s-kg dry matter, superficial air velocity of 3.2 m/s, bed depth of 0.1 m, primary energy consumption was 2.32 MJ/kg water evaporated and total drying cost was 113.6 baht/ton of paddy. The cost could be divided into fixed cost, 35.2 baht/ton, and variable cost, 78.4 baht/ton. The total cost per kilogram of water evaporated was 0.77 baht.
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