Measurement of Interface Level, Holdup, Pulsation Frequency, and Amplitude in a Pulsed Column by Air Purge

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• 作者：Jing Chen ; Rong Fu ; Shiping Xu ; Qiulin Wu ; and Chongli Song
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2002
• 出版时间：April 3, 2002
• 年：2002
• 卷：41
• 期：7
• 页码：1868 - 1872
• 全文大小：50K
• 年卷期：v.41,no.7(April 3, 2002)
• ISSN：1520-5045

文摘

The air purge is an old method. However, it is very simple and suitable for the nuclear industrywhere the simple, robust instruments are required. In the present work, the long-distance andonline measurement of the pulsed column parameters was achieved by a simple insertion ofthree purge probes. The specially constructed purge probes were installed in the pulsed column,and two differential pressure response curves were obtained on a computer. The two curvesgive information on the two-phase interface level, holdup, and pulsation intensity. The measuringaccuracy for the two-phase interface level is within ±5 mm. The relative measuring deviationsare within ±2% for pulsation frequency and within ±5% for holdup. One response curve reflectsthe sinusoidal pulsation wave, and a parameter S was derived from the area of the sinusoidalwaveform. A good linear relationship between apparent pulsation amplitude and the parameterS was found. The dependency of the real pulsation amplitude on the apparent pulsationamplitude and frequency has been experimentally determined. Thus, the real pulsation amplitudecan also be measured by direct air purge.