Hydrodynamics study on drying of pepper in swirling fluidized bed dryer (SFBD)

International Research and Innovation Summit 2017

Haron, Nazrul Syaif^1 ; Zakaria, Jamal Hazri^1 ; Batcha, Mohd Faizal Mohideen^1

Centre for Energy and Industrial Environment Studies, Faculty of Mechanical Engineering and Manufacturing, Universiti Tun Hussein Onn Malaysia, Parit Raja, Johor, Batu Pahat

86400, Malaysia^1

关键词: Conventional drying;    Conventional methods;    Drying temperature;    Fluidized bed dryers;    Fluidized bed drying;    Hydrodynamic studies;    Mixing ability;    Rainy seasons;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/226/1/012053/pdf
DOI  :  10.1088/1757-899X/226/1/012053

来源: IOP

【 摘 要 】

Malaysia is one of the pepper producer with exports quantity reaching more than 90000 tonnes between 2010 until 2016. Drying of pepper is mandatory before their export and at present, pepper was dried by sun drying to reduce cost. This conventional drying method was time consuming and may take four days during rainy season, which retards the production of pepper. This paper proposes the swirling fluidized bed drying (SFBD) method, which was known to have high mixing ability and improved solid-gas contact to shorten the drying time of products. A lab scale SFBD system was constructed to carry out this study. Hydrodynamic study was conducted for three beds loadings of 1.0 kg, 1.4 kg at a drying temperature of 90°C. The SFBD has shown excellent potential to dry the pepper with a relatively short drying time compared to the conventional method. Batch drying for the bed loads studied only took 3 hours of drying time only. It was found that bed higher bed loading of wet pepper requires longer drying time due to higher amount of moisture content in the bed. Four distinct regimes of operation were found during drying in the SFBD and these regimes offer flexibility of operation. The total bed pressure drop was relatively low during drying.