Measurement and Comparison of Gas Holdup Distributions in a Stirred Rushton Tank with  γ-CT1

LIU Yuejin; HAN Luchang; LUO Hean; BAI Ge

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Measurement and Comparison of Gas Holdup Distributions in a Stirred Rushton Tank with γ-CT1

LIU Yuejin * #,HAN Luchang,LUO Hean,BAI Ge

College of Chemical Engineering,Xiangtan University,Xiangtan,411105, P.R.China

*Correspondence author

#Submitted by

Subject:

Funding: 国家自然科学基金,教育部高校博士点学科专项科研基金,湖南省自然科学基金（No.20776121,20050530001,05JJ30026）

Opened online: 8 January 2009

Accepted by: none

Citation: LIU Yuejin,HAN Luchang,LUO Hean.Measurement and Comparison of Gas Holdup Distributions in a Stirred Rushton Tank with γ-CT1[OL]. [ 8 January 2009] http://en.paper.edu.cn/en_releasepaper/content/27502

Three gas dispersion states in liquid — cup dispersion, critical dispersion and full dispersion in a standard gas-liquid stirred Rushton tank (20cm i.d.) were divided based on experimentally based on experimentally observed phenomena. Only those gas dispersion states that were over their corresponding critical gas dispersion states were of signification in industrial applications. Detailed cross-section CT scan images were obtained using a Cs-137 γ-CT scan setup in CREL for the tank at 3/4 dimensionless static liquid height at larger gas rates and higher impeller rotating speeds, when gas dispersion states were over the corresponding critical dispersion states, and their corresponding relationships of gas holdup distribution with dimension radius were established based on the CT images. The comparsions and analyses of the distributions of gas holdup at 3/4 dimensionless static liquid height were investigated based on the CT images and their corresponding digital distribution curves of gas hold up with dimension radius. The work done in this paper is of great significance in measurement and comparison of gas holdup distributions for gas-liquid stirred Rushton tanks.

Keywords:measurement;gas holdup;distribution;Rushton gas-liquid stirred tank;γ-computer tomography (CT)

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