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Tubular Bowl Centrifuges (TBC) are essential in chemical processing, notably in nuclear fuel reprocessing plants for recovering fissile and fertile materials from spent fuel. TBCs are used for clarification, separating fine solid particles from the dissolver solution obtained after chopping spent nuclear fuel, and preventing clogging of liquid transfer lines and solvent degradation. TBCs are preferred for their high settling velocity and high G-force, enabling efficient separation of fine particles (0.5–500 μm) with shorter residence times, simplifying the processing of unstable materials. The separation efficiency depends on the hydrodynamics within the high-speed rotating bowl, influenced by solvent properties and operating parameters. This study visualizes the liquid’s free surface profile in the centrifuge bowl from a stationary state to a paraboloid shape, estimating parameters like cut-off speed, residence time, pressure distribution, and velocity distribution using CFD tools. Experimental validation and further parametric studies are also conducted.

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Hydrodynamics of a Rotating Solid–Liquid Clarification System

  • 会议论文

  • 发表日期：

    2025年

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  • Srishti Priya,
  • Satish Kumar Velaga,
  • Remya Murali,
  • R. Rohini,
  • P. Varadharajan,
  • J. Kodandaraman,
  • K. Rajan

摘要

Tubular Bowl Centrifuges (TBC) are essential in chemical processing, notably in nuclear fuel reprocessing plants for recovering fissile and fertile materials from spent fuel. TBCs are used for clarification, separating fine solid particles from the dissolver solution obtained after chopping spent nuclear fuel, and preventing clogging of liquid transfer lines and solvent degradation. TBCs are preferred for their high settling velocity and high G-force, enabling efficient separation of fine particles (0.5–500 μm) with shorter residence times, simplifying the processing of unstable materials. The separation efficiency depends on the hydrodynamics within the high-speed rotating bowl, influenced by solvent properties and operating parameters. This study visualizes the liquid’s free surface profile in the centrifuge bowl from a stationary state to a paraboloid shape, estimating parameters like cut-off speed, residence time, pressure distribution, and velocity distribution using CFD tools. Experimental validation and further parametric studies are also conducted.