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        Simulations of water vaporization in novel internal-intensified spouted beds: Multiphase-flow, heat and mass transfer

        Xinxin Che,Rong Guo,Feng Wu,Haibo Ren,Wenjing Zhou 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.116 No.-

        Novel internal-intensified spouted beds (SBs) with swirl-nozzle anticlockwise-axial-swirler (SNAAS) andswirl-nozzle clockwise-axial-swirler (SNCAS) were proposed to improve the shortcomings of conventionalSBs. The water vaporization in novel internal-intensified, conventional and swirl-nozzle SBs wassimulated and the multiphase flow behavior and interphase heat and mass transfer in process were analyzed. Simulation results show the co-swirling action of novel combined internal-intensified makes gasdrive particles move helically upward around the axial-swirler. Therefore, compared with conventionaland swirler-nozzle SBs, the radial slip velocity of gas–solid and gas–liquid in two novel SBs are larger,and the contact between gas–liquid-solid phases is more sufficient. The gas–liquid-solid three-phasetemperature, water vaporization rate, and gas moisture content of two novel internal-intensified allreached the highest, indicating that novel combined internal-intensified structures are beneficial to promotingthe interphase heat and mass transfer during the water vaporization process. The mass transferenhancement factors of SNAAS and SNCAS structures are 1.91 and 1.36 times that of conventional SB,respectively.

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