首页|The transition to turbulent fluidization in a gas-solid fluidized bed operating from ambient temperature to 1600 ℃
The transition to turbulent fluidization in a gas-solid fluidized bed operating from ambient temperature to 1600 ℃
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Turbulent fluidized bed proves effective in industrial processes due to superior heat and mass transfer and chemical reaction performance.However,understanding the transition to turbulent fluidization remains limited,especially at temperatures exceeding 1000 ℃,making it challenging to develop high-temperature fluidized bed applications.This paper presents an experimental investigation on the tur-bulent fluidization onset velocity(Uc),measured in a 30 mm diameter bed using corundum particles with average diameters from 0.68 mm to 1.58 mm in temperatures from ambient to 1600 ℃.Experi-mental results reveal that Uc increases with temperature up to 600 ℃,stabilizes within the 600-1200 ℃ range,and then decreases above 1200 ℃,demonstrating the varying relative significance of hydrody-namic and interparticle forces at different temperatures.To help design and operate high-temperature applications of turbulent fluidization,we developed Uc correlations based on experimental data from both literature sources and this study,covering temperatures of up to 1600 ℃ and particles of Groups A to D.
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