Predietion for Pressure Drop across the Ceramic Tube Filter (CTF).
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概要
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he pressure drop across CTF (Ceramic Tube Filter) which is installed at Wakamatsu 71MW PFBC combined cycle power plant, is one of key parameters for both plant operation and performance. The pressure drop was attempted to predict, based on the data obtained with/without pre-cleaning cyclones installed at the upstream of CTF in Phasel and Phase2, respectively. The pressure drop consisted of two components of base line for filter itself and increasing ones with accumulated ash.<BR>The base line pressure drop soon after pulse cleaning (ΔP<SUB>base</SUB>) was estimated based on D'Arcy law using pre-measured L/K (thickness/permeability) values, while the rate of increasing pressure drop with accumulated ash between pulse cleaning interval (dΔP<SUB>c</SUB>/dt) was estimated by Kozeny-Carman equation using ash analysis. Thus, the maximum pressure drop across filters was predicted successfully in both with/without pre-cleaning system from the respective linear correlation. The reason why ΔP<SUB>base</SUB> was much higher without pre-cleaning system (Phase2) is discussed in terms of both characterization of permanent ash layer and behavior of fine ash in CTF during pulse cleaning.
- 一般社団法人 日本エネルギー学会の論文
一般社団法人 日本エネルギー学会 | 論文
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