Journal of the Korean Industrial and Engineering Chemistry, Vol.17, No.5, 509-516, October, 2006
기 - 액 - 고 3상계 교반조내의 고-액간 물질이동
Solid-Liquid Mass Transfer in Gas-Solid-Liquid 3-Phase System Agitated Vessel
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초록
Rushton turbine, paddle and propeller 임펠러 등 표준적인 임펠러가 부착된 기-액-고 3상교반조에서 고-액간 물질이동계수 kL를 측정하였다. 표준적인 임펠러들에 대한 부유화한계회전수 Njs는 임펠러 높이와 가스유속에 따라 변했다. 입자부유가 통기에 의존한 Rushton turbine 임펠러의 물질이동계수는 Pgv에만 상관하였다. Rushton turbine, paddle and propeller 임펠러에 대한 물질이동계수 kL은 임펠러의 종류에 의하지 않고 임펠러 위치에 영향을 받았다.
The solid-liquid mass transfer coefficients kL in a gas-liquid-solid three phases agitated vessel were measured with conventional impellers (e.g. Rushton turbine, paddle, and propeller). For the conventional impellers the rotational speed for the complete suspension Njs changes with the impeller height and gas flow rate. Mass transfer coefficient of the Rushton turbin impeller, for which the particle suspension was independent of the aeration, is correlated only with Pgv. Mass transfer coefficients kL for the Rushton turbine, paddle and propeller impellers were affected by the impeller position.
Keywords:mass transfer coefficients;rotational speed for complete suspension;aeration power consumption;agitation power consumption;conventional impellers
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