Oxy-fuel combustion and circulating fluidized bed (CFB) technologies were applied to waste sewage sludge using a cold-bed and a 30 kWth CFB pilot test bed. In the cold-bed tests, the minimum fluidization velocity (umf) and the superficial velocity were determined as 0.120 m/s and 2.5 m/s, respectively. In pilot tests, the combustion characteristics of waste sewage sludge in oxy-fuel condition were very distinctive compared with that in air condition in terms of operation parameters such as the distribution of pressure drop and temperature, flue-gas temperature, and the composition of ash and flue-gas. Based on cold-bed and pilot bed tests, the oxygen injection rate was optimized in the range from 21% to 25% in oxy-fuel condition for waste sludge combustion to apply oxy-fuel combustion and CFB technologies with considering technologies for stable and economic operation.
Bibliographical noteFunding Information:
This work was supported by the New & Renewable Energy Core Technology Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) Granted financial resource from the Ministry of Trade, Industry & Energy, Republic of Korea (No. 20113010130050 , No. 20143010091790 ). This work is financially supported by Korea Ministry of Environment (MOE) as Waste to Energy and Recycling/Knowledge-based Environmental Service Human Resource Development Project as well.
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All Science Journal Classification (ASJC) codes
- Chemical Engineering(all)
- Fuel Technology
- Energy Engineering and Power Technology
- Organic Chemistry