对带三层组合搅拌桨的羰基合成反应器进行计算流体力学(CFD)模拟,对比分析了反应器放大前后及底层桨优化前后反应器内流场、气含率分布和搅拌功率等参数的变化规律,研究反应器的放大及桨型优化效果.模拟结果表明,当釜径从4 600 mm放大到5 200 mm时,反应器内流场分布和气含率分布与放大前相似,具有相近的混合效果,说明放大后的搅拌桨能达到预定的效果,所选用的放大准则是合理的.采用新弯叶径向流搅拌桨替换底层直叶径向流桨后,发现该搅拌桨不仅具有更好的搅拌混合效果,而且搅拌功率较直叶桨搅拌功率降低了约51%.%A computational fluid dynamics (CFD) simulation method was developed to study the scale-up characteristics of the oxo-synthesis reactor with three-lay impellers and the optimization of impellers. The variations of flow field, gas distribution and power consumption of the gas-liquid stirred tank before and after scale-up were investigated. The results showed that the flow distribution and gas distribution were similar when the tank diameter increased from 4 600 mm to 5 200 mm, which indicated that the difference in mixing was negligible after the impellers scale-up, and the selected scale-up criteria was reasonable.In addition, the new blade showed higher mixing efficiency than the straight blade and the power consumption was decreased by 51%.
展开▼
