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액상 유동층의 입자분산
Fluidizing Particle Dispersion in a Liquid Fluidized Bed
HWAHAK KONGHAK, April 1990, 28(2), 177-183(7), NONE
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Abstract
액체 유동층(0.152m-내경×2.5m-높이)에서 정상상태에 도달하는 압력변화 과정과 유동입자의 분산 및 입자의 빈도수 등의 유동입자의 동특성을 relaxation 방법에 의하여 해석하였다. 유동입자의 크기(1.0-1.6mm), 액상유속(30-140mm/s)이 유동입자의 분산계수 및 입자의 빈도수에 미치는 영향을 결정하였다. 유동입자의 분산과 빈도수는 액체유속과 층 공극률의 증가에 따라 최대값을 나타내며 이 최대값을 나타내는 층 공극률은 유동입자 흐름형태가 변환되는 층 공극률과 거의 일치하였다.
The dispersion and frequency of fluidizing particles and the histogram of pressure fluctuations have been analyzed in a liquid fluidized bed. The effects of particle size(1.0-6.0mm)and liquid velocity(3-14cm/s)on the dispersion coefficient and frequency of fluidizing particles have been determined in a 0.152m-ID×2.5m high Plex-iglas column. The dispersion coefficient and frequency of fluidizing particles exhibit their maximum values with an in-crease in liquid velocity and consequent increase in bed porosity. The maximum particle dispersion coefficient ex-hibits at the bed porosity where the flow transition of particles occurs in the bed.
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