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以喷气机械搅拌精炼过程为背景,研究了搅拌方式、喷气流量、搅拌转速等因素对气体吸收速率的影响,通过测定NaOH吸收CO2的速率研究气泡微细化过程,探讨了各种因素对容积传质系数和CO2利用率的影响规律.结果表明,中心搅拌情况下传质系数和气体利用率按单向、间歇和双向模式增加;容积传质系数无论在何种搅拌模式下均随着气体流量的增加而增加,但气体利用率则随着气体流量的增加而呈现先减小后增大的趋势;中心单向搅拌模式下容积传质系数和气体利用率均随着搅拌速率的增加而变小.在实验基础上,应用因次分析原理关联了容积传质系数与相关数群的准数方程,为高温实验的气泡微细化了提供科学和实验依据.
Based on the jet mixing process, the effects of stirring mode, jet flow rate, stirring speed and other factors on the gas absorption rate were studied. The gas bubble refining process was studied by measuring the rate of CO2 absorption by NaOH. The effects of various factors on volumetric mass transfer Coefficient and CO2 utilization.The results show that mass transfer coefficient and gas utilization increase with one-way, intermittent and two-way model under the condition of central mixing.The volumetric mass transfer coefficient increases with gas flow rate But the gas utilization rate first decreases and then increases with the increase of gas flow rate. Volumetric mass transfer coefficient and gas utilization rate decrease with the increase of stirring rate in central one-way mixing mode On the basis of experiments, the principle of factorial analysis is used to correlate the mass transfer coefficient and the quasi - number equation of the related number groups, which provides scientific and experimental evidences for the bubble refinement in high temperature experiments.