Evaluation of Combustion Characteristics of Sewage Sludge using a Demonstration Plant in Fluidized Bed Incinerator with Turbocharger
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概要
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A new type of sewage sludge incinerator, which combines a pressurized fluidized bed combustor and a turbocharger driven by flue gas, was proposed. We constructed a demonstration plant (4.32 t/d scale) at a sewage works in Oshamanbe Cho in Hokkaido. The objectives of this study were combustion characteristics of de-watered sludge in this plant. Additionally, the characteristics between our new plant and a conventional one were compared using the experimental results. As the results, CO NO<SUB>x</SUB>, and N<SUB>2</SUB>O emissions were SUBstantially reduced by the pressurization. N<SUB>2</SUB>O emission could be controlled by the freeboard temperature in spite of the high nitrogen content of the fuel and the pressurized conditions. In particular, N<SUB>2</SUB>O emission of the new plant was less half of that of the conventional plant. It is thought that N<SUB>2</SUB>O was decomposed at a local high temperature place in the freeboard. This phenomenon was verified qualitatively by investigating the chemical reaction rates. Therefore, our new fluidized bed incinerator with the turbocharger had a low environmental impact.
- 一般社団法人 スマートプロセス学会 （旧高温学会）の論文
一般社団法人 スマートプロセス学会 （旧高温学会） | 論文
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