Effect of Operating Pressure on Freeboard Temperature Distribution in a Pressurized Fluidized Bed Incinerator of Sewage Sludge

Takahiro MURAKAMI; Akio KITAJIMA; Yoshizo SUZUKI; Hidekazu NAGASAWA; Takafumi YAMAMOTO; Takami KOSEKI; Hitoshi HIROSE; Seiichiro OKAMOTO

doi:10.11395/jjsem.10.s58

Takahiro MURAKAMI, Akio KITAJIMA, Yoshizo SUZUKI, Hidekazu NAGASAWA, Takafumi YAMAMOTO, Takami KOSEKI, Hitoshi HIROSE, Seiichiro OKAMOTO

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Keywords: Sewage Sludge, Pressurized Fluidized Bed, Incinerator, Combustion, N₂O, Temperature Distribution, Computational Analysis

JOURNAL FREE ACCESS

2010 Volume 10 Issue Special_Issue Pages s58-s61

DOI https://doi.org/10.11395/jjsem.10.s58

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Abstract

The effect of operating pressure on freeboard temperature distribution, which has a strong effect on N₂O emission, in a pressurized fluidized bed incinerator of sewage sludge, was estimated by a computational analysis and compared with experiments. A local high-temperature zone was found to appear in the freeboard under the pressurized conditions in the combustor. This suggests the substantial reduction of N₂O concentration in the high-temperature zone due to N₂O destruction reaction.

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