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以新型冶金多相流搅拌管式反应器为研究对象,建立了搅拌反应器内的液/固两相流动数学模型,采用数值模拟的方法研究了管式反应器内两相流场的速度分布、浓度分布及临界悬浮转速,并与实验结果进行对比.结果表明,增加搅拌装置的管式反应器与传统管式反应器相比,湍流性能大大增强,且不存在流动死区,在搅拌转速为150 r/min时,两相流获得的最大速度为1.58 m/s;搅拌转速为150和250 r/min时,径向混合相对均匀,较低转速(25 r/min)和较高转速(350 r/min)均不利于两相混合;在固体浓度为2%和7.5%时,临界悬浮转速分别为35和38 r/min.
Taking the new metallurgical multiphase flow stirred-tube reactor as the research object, the mathematical model of liquid / solid two-phase flow in the stirred reactor was established. The velocity distribution of the two-phase flow field in the tubular reactor was studied by numerical simulation , The concentration distribution and the critical suspension speed are compared with the experimental results.The results show that compared with the traditional tubular reactors, the turbulent performance of the tubular reactor with increased stirring device is greatly enhanced and there is no flow dead zone, and the stirring speed At 150 r / min, the maximum velocity of the two-phase flow is 1.58 m / s. When the stirring speed is 150 and 250 r / min, the radial mixing is relatively uniform. The lower speed (25 r / min) and the higher speed (350 r / min) are not conducive to the mixing of two phases; the critical suspension speed is 35 and 38 r / min respectively when the solid concentration is 2% and 7.5%.