Development of Cross-Flow Fluidized Bed Paddy Dryer |
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Authors: | Somchart Sopornonnarit Somkiat prachayawarakorn Ornanong Sripawaatakul |
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Affiliation: | 1. School of Energy and Material King Mongkut's Institute of Technology Thonburi Suksawat 48 Rd , Bangkok, 10140, Thailand;2. Faculty of Engineering King Mongkut's Institute of Technology Thonburi Suksawat 48 Rd , Bangkok, 10140, Thailand;3. Farmer graduate student King Mongkut's Institute of Technology Thonburi Suksawat 48 Rd , Bangkok, 10140, Thailand |
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Abstract: | ABSTRACT A cross-flow fluidized bed paddy dryer with a capacily of 200 kgh was designed, fabricated and tested. Experimental results showed that final moisture content of paddy should not be lower than 23 % dry-basis if quality is to be maintained. Drying air temperature was keot constant at 115°C according to the recommendation of previous work. Results obtained from the mathematical model developed in this study indicatedthat optimum operating parameters should be as follows : air speed of 2.3 m/s, bed thickness of 10 cm and fraction of air recycled of 80 %. At this condition, energy consumption was close to the minimum while drying capacity was near the maximum. A prototype fluidized bed dryer with a capacity of 1 t/h was designed, fabricated and installed with the collaboration of a private company. The unit has been used for almost the whole past harvesting season in 1994 at a paddy merchant sile with preference compared to conventional column continuous dryers. More than 300 tons of paddy were dried without any problems. |
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Keywords: | Drying fluidization grain modelling strategy |
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