Analysis of Pressure Fluctuation Signals of an L-valve
Date Issued
2006-01-18
Date
2006-01-18
Author(s)
Leu, L.P.
DOI
932214E002024
Abstract
The experimental apparatus consist of the downcomer and L-valve made by the transparent Plexiglas column, 80mm i.d. The influence of the riser velocity, position of aeration tap, aeration direction and aeration depth was determined by the measurement of solid flow rate, pressure drop and pressure fluctuations at various pressure probe position. The results show that the solid flow rate of L-valve increased with lower position of aeration taps. The standard deviation of pressure signals increased sharply with the formation of large gas bubbles in the downcomer. The solid flow rate of downflow of inlet gas was slightly less than that of horizontal flow of inlet gas. But the standard deviation of pressure signals of downflow of inlet gas decreased significantly, causing more stable operation. From comparing the results of different aeration directions by aerating at the lowest position of aeration tap, when the pressure measured in lower part of the downcomer and the horizontal section of L-valve was no more increased, that could suppose that the pressure drop of the downcomer was its maximum value.
Subjects
L-valve
pressure fluctuations
solid flow rate
Publisher
臺北市：國立臺灣大學化學工程學系暨研究所
Type
report
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