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http://dx.doi.org/10.7464/ksct.2017.23.3.331

Investigation on Combustion Characteristics of Sewage Sludge using Pilot-scale Bubbling Fluidized Bed Reactor  

Kim, Donghee (Korea Institute of Industrial Technology)
Huh, Kang Y. (Department of Mechanical Engineering, Pohang University of Science and Technology)
Ahn, Hyungjun (Korea Institute of Industrial Technology)
Lee, Youngjae (Korea Institute of Industrial Technology)
Publication Information
Clean Technology / v.23, no.3, 2017 , pp. 331-342 More about this Journal
Abstract
To estimate the combustion characteristics of sewage sludge and wood pellet, thermogravimetric analysis (TGA) was conducted. As TGA results, combustion characteristics of sewage sludge was worse than wood pellet. In ash fusion temperature (AFT) analysis, slagging tendency of sewage sludge is very high compared to wood pellet. And also, the bubbling fluidized bed reactor with a inner diameter 400 mm and a height of 4300 mm was used for experimental study of combustion characteristics fueled by sewage sludge and wood pellet. The facility consists of a fluidized bed reactor, preheater, screw feeder, cyclone, ash capture equipment and gas analyzer. The thermal input of sewage sludge cases were $54.5{\sim}96.5kW_{th}$, in case of wood pellet experiment, it was $96.1kW_{th}$. As experiment results, the $NO_x$ emission of sewage sludge was averagely about 10 times the $NO_x$ emission of wood pellet. And also CO emission of sewage sludge is about 3.5 times of wood pellet. Lastly as a result of analysis of captured ash in cyclone, the combustion efficiency of all cases were over 99%, but the potential for slagging/fouling was high at all cases by component analysis of ash.
Keywords
Sewage sludge; Wood pellet; Bubbling fluidized bed; $NO_x$ emissions; Slagging; Fouling;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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