Abstract
As a first stage of studies on the development of a fluidized bed incinerator for radioactive spent ion-exchange resins, the axial mixing characteristics of anion exchange resin beads and glass beads in a fluidized bed were investigated. The extent of axial solid mixing could be well characterized with a diffusion model and a global mixing index under various experimental conditions such as excess air velocities, size differences of particles and concentrations of resins. It was found that a certain extent of mixing or segregation was reached after 90 s. Axial diffusion coefficients are varing from 1 to 5 cm2/s in this experimental ranges. The best conditions to incinerate anion resin beads with glass beads as bed materials in the gas-solid fluidized bed system, were 30 wt% of resins in overall composition and excess air velocity over 8 cm/s with glass beads having an averaged diameter of 320 μm.
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Seo, Y.C., Ko, M.H. & Kang, Y. Axial mixing of resin beads in a gas-solid fluidized bed. Korean J. Chem. Eng. 9, 212–218 (1992). https://doi.org/10.1007/BF02705295
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DOI: https://doi.org/10.1007/BF02705295