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A Study on the Drying and Carbonization of Sewage Sludge in Fluidized Bed Reactor  

Choung, Young-Hean (Department of Environmental Engineering, Pusan National University)
Cho, Ki-Chul (Department of Environmental Engineering, Pusan National University)
Kang, Dong-Hyo (Environmental Installation Corporation in Busan metropolitan city)
Kim, Yi-Kwang (Nakdong River Basin Environmental Office)
Park, Chang-Woong (Lloyd's Register Quality Assurance Korea Ltd.)
Oh, Kwang-Joong (Department of Environmental Engineering, Pusan National University)
Publication Information
Journal of Korean Society of Environmental Engineers / v.28, no.7, 2006 , pp. 746-751 More about this Journal
Abstract
In this study, drying and carbonization experiment was conducted in a fluidized bed reactor according to the variations in gas velocity, particle size, and reactor temperature. As a result, the weight loss rates of sludge by drying in the fixed bed and fluidized bed type dryer showed that drying in the fluidized bed was about 6 times faster than drying in the fixed bed, and the weight loss rates of sludge by carbonization in the fixed bed and fluidized bed type reactor showed that carbonization in the fluidized bed was about 4 times faster than drying in the fixed bed. This implies that carbonization in the fluidized bed was completed within 10 minutes. Although the amount of char decreased with the increase of carboniration temperature, the amount of char became similar at upper 873K. Also, the amount of char decreased with increasing gas velocity. Consequently, it could be efficient that slow fluidization should be maintained within the range of fluidization in case of fluidized carbonization of sewage sludge at 873K.
Keywords
Sewage Sludge; Fluidized Bed; Char; Drying; Carbonization;
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