Effect of Sparger Geometry on Gas-Volume-Fraction in Vertical Bubble-Column Flows Measured by Gamma-Densitometry Tomography (GDT).

[摘要] Gamma-densitometry tomography (GDT) is applied to study the effect of sparger geometry on the axial development of gas-volume-fraction profiles in a vertical bubble-column flow. Tests are conducted in a cylindrical vessel with an inner diameter of 0.48 m and a height of 3 m using air for the gas phase and lightweight mineral oil (Dradeol 10) for the liquid phase. A cross sparger with interchangeable arms is used to inject gas into the column at a height of 0.33 to 0.36 diameters above the bottom of the column. The superficial gas velocity ranges from 5 to 30 cm/s, and the absolute column pressure ranges from 103 to 517 kPa. Radial distributions of gas volume fraction at eight axial locations from five different sparger geometries are presented.

[发布机构] Technical Information Center Oak Ridge Tennessee

[学科分类] 工程和技术（综合）

[关键词] Spargers;Tomography;Fluid flow;Design;Slurry bubble-column reactors