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http://dx.doi.org/10.9713/kcer.2017.55.6.846

Combustion Characteristics of Waste Sewage Sludge using Oxy-fuel Circulating Fluidized Bed  

Jang, Ha-Na (Department of Environmental Engineering, Yonsei University)
Sung, Jin-Ho (Department of Environmental Engineering, Yonsei University)
Choi, Hang Seok (Department of Environmental Engineering, Yonsei University)
Seo, Yong-Chil (Department of Environmental Engineering, Yonsei University)
Publication Information
Korean Chemical Engineering Research / v.55, no.6, 2017 , pp. 846-853 More about this Journal
Abstract
Cold bed and $30kW_{th}$ pilot bed tests using circulating fluidized bed (CFB) were conducted to apply oxy-fuel technology for waste sludge combustion as a carbon capture and storage technology. In cold bed test, the minimum fluidization velocity ($u_{mf}$) and superficial velocity for fast fluidization was determined as 0.120 m/s and 2.5 m/s, respectively. In the pilot test, air and oxy-fuel combustion experiments for waste sludge were conducted using CFB unit. The flue-gas temperature in 21~25% oxy-fuel combustion was higher than that of air and up to 30% oxy-fuel combustion. In addition, the concentration of carbon dioxide was more than 80% with the oxygen injection range from 21% to 25% in oxy-fuel CFB waste sludge combustion.
Keywords
Waste sludge; Circulating fluidized bed; Oxy-fuel combustion; Carbon dioxide;
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