CIESC Journal ›› 2010, Vol. 61 ›› Issue (9): 2448-2453.
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LIU Shuxian, SUN Guogang, FU Xuan, SHI Mingxian
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刘书贤,孙国刚,付烜,时铭显
Abstract:
To investigate the performances of rough-cut cyclone in FCC disengager, two-fluid model provided by Fluent 6.2 was used for simulation of the dense phase flow.Agglomeration among particles was calculated by a set of improved gas-solid drag expressions.The results show that separation efficiency of rough-cut cyclone for catalyst reaches 98.48%.The solid concentration influences on the leakage of gases off dipleg are involved in three mechanisms: weakening on the gas swirling motion, dragging forces fundamentally caused by the particle gravitation and the wrapping effects onto the gas.The leakage ratio of the dipleg is 32.17% and it can be reduced to 20.97% by adding a hopper.It is proved that the concentration turning point for pressure drop is a function concerning particle density, viscosity and granular sizes.Pressure drops of rough-cut cyclone calculated by the wall film growth theory have good agreement with numerical simulation results.
Key words: 催化裂化, 粗旋, 性能, 模拟
催化裂化,
关键词: 催化裂化, 粗旋, 性能, 模拟
LIU Shuxian, SUN Guogang, FU Xuan, SHI Mingxian. Numerical simulation on performances of rough-cut cyclone in FCC disengager[J]. CIESC Journal, 2010, 61(9): 2448-2453.
刘书贤, 孙国刚, 付烜, 时铭显. FCC沉降器粗旋工作性能的数值模拟 [J]. 化工学报, 2010, 61(9): 2448-2453.
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