The axial and radial profiles of the gas holdup and bubble parameters in an external-loop airlift reactor of inner diameter 0.09 m and height 1.8 m were measured with the differential pressure method and dual-tip elec...The axial and radial profiles of the gas holdup and bubble parameters in an external-loop airlift reactor of inner diameter 0.09 m and height 1.8 m were measured with the differential pressure method and dual-tip electrical conductivity probe at different superficial gas velocities.Air and water were used as the gas and liquid phases,respectively.The experimental data of the average and local gas holdups,bubble size and its distribution,bubble rising velocity,bubble frequency and gas-liquid interfacial area were obtained,and were analyzed based on the gas-liquid flow field and bubble-bubble interaction.The local gas holdup was correlated in terms of superficial gas velocity,axial height and radial position based on the experimental data.展开更多
碳酸锂的粒度及形貌决定其性能和应用。通过考察反应结晶温度、进料速率、晶种用量和搅拌速率对碳酸锂产品平均粒径的影响以及添加剂的用量对产品形貌的影响,提供了一种经过优化的制备碳酸锂的反应结晶工艺。通过正交实验确定了反应结...碳酸锂的粒度及形貌决定其性能和应用。通过考察反应结晶温度、进料速率、晶种用量和搅拌速率对碳酸锂产品平均粒径的影响以及添加剂的用量对产品形貌的影响,提供了一种经过优化的制备碳酸锂的反应结晶工艺。通过正交实验确定了反应结晶制备碳酸锂的最佳实验条件:200 m L质量浓度为90 g/L的氯化锂溶液一次性加入反应结晶器内,质量浓度为260 g/L的碳酸钠溶液的加料速率为0.5 m L/min,晶种用量为2%(占碳酸锂理论产量的分数),搅拌速率为400 r/min,反应温度为80℃,添加剂六偏磷酸钠用量为2%(占碳酸锂理论产量的分数)。在此条件下制得的碳酸锂为平均粒径为132μm、变异系数为51.53%的密实球形产品。研究表明,反应温度对晶体粒度的影响最大,添加剂对晶体的粒度和形貌起到调控作用。展开更多
文摘The axial and radial profiles of the gas holdup and bubble parameters in an external-loop airlift reactor of inner diameter 0.09 m and height 1.8 m were measured with the differential pressure method and dual-tip electrical conductivity probe at different superficial gas velocities.Air and water were used as the gas and liquid phases,respectively.The experimental data of the average and local gas holdups,bubble size and its distribution,bubble rising velocity,bubble frequency and gas-liquid interfacial area were obtained,and were analyzed based on the gas-liquid flow field and bubble-bubble interaction.The local gas holdup was correlated in terms of superficial gas velocity,axial height and radial position based on the experimental data.
文摘碳酸锂的粒度及形貌决定其性能和应用。通过考察反应结晶温度、进料速率、晶种用量和搅拌速率对碳酸锂产品平均粒径的影响以及添加剂的用量对产品形貌的影响,提供了一种经过优化的制备碳酸锂的反应结晶工艺。通过正交实验确定了反应结晶制备碳酸锂的最佳实验条件:200 m L质量浓度为90 g/L的氯化锂溶液一次性加入反应结晶器内,质量浓度为260 g/L的碳酸钠溶液的加料速率为0.5 m L/min,晶种用量为2%(占碳酸锂理论产量的分数),搅拌速率为400 r/min,反应温度为80℃,添加剂六偏磷酸钠用量为2%(占碳酸锂理论产量的分数)。在此条件下制得的碳酸锂为平均粒径为132μm、变异系数为51.53%的密实球形产品。研究表明,反应温度对晶体粒度的影响最大,添加剂对晶体的粒度和形貌起到调控作用。
