A Numerical Study on Cooling-Solidification Process of Urea Particles in Prilling Tower

DOI Web Site Web Site 参考文献6件
  • Mehrez Ali
    Department of Energy Resources Engineering, Egypt–Japan University of Science and Technology E-JUST
  • Ookawara Shinichi
    Department of Energy Resources Engineering, Egypt–Japan University of Science and Technology E-JUST Department of Chemical Engineering, Tokyo Institute of Technology
  • Ali Ahmed Hamza H.
    Department of Energy Resources Engineering, Egypt–Japan University of Science and Technology E-JUST
  • Suzuki Masaaki
    Department of Energy Resources Engineering, Egypt–Japan University of Science and Technology E-JUST Department of Chemical Engineering, Tokyo Institute of Technology

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Urea prills are produced in a prilling tower where a cooling-solidification process takes place. The ambient air is used as the cooling air stream for this process. In this study, the cooling-solidification process was numerically investigated in the particle size range of commercial product. The simulations predicted that the temperature of smaller particles fully solidified became nearly identical with that of cooling air over the entire body at the bottom of tower. It was found, on the other hand, that the temperature of larger particles remained high over a large portion of its core part. SEM observation of the particle cross-section favorably validated the numerical predictions.

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