φ10mm离心萃取器水力学性能研究

Study on Hydraulic Performance of φ10 mm Centrifugal Extractor

为将φ10mm离心萃取器用于Purex流程钚纯化循环反萃段的实验研究中,当水相和有机相流比为1∶4,离心萃取器的重相堰直径分别为6.4、6.6和6.8mm时,考察了两相出口料液的夹带情况以及环隙和转筒内液体体积随转速的变化等水力学性能。研究表明,当两相总流量小于9.0mL/min、转速大于4 000r/min时,离心萃取器处于稳定可操作区间。此时两相出口料液均不夹带,两相混合区内液体量约为0.7mL,转筒内液体量约为2.2mL。结合总流量可进一步计算得出两相接触时间。

For applying φ10 mm centrifugal extractor to study on the back-extraction section of plutonium purification cycle in Purex process,the characteristics such as the entrainment state of the two-phase exit liquid,the volume of the liquid in both the annular space and the rotor were studied when the rotor speed was changed,with the two-phase flow ratio（A∶O） 1∶4 and the heavy phase weir diameter 6.4 mm,6.6 mm and 6.8 mm,respectively.The results show that the centrifugal extractor has a stable operational state when the total flow is less than 9.0 mL/min and the rotor speed is greater than 4 000 r/min.There is no entrainment in the liquid two-phase exit.The liquid volumes in the annular space and the rotor are about 0.7 mL and 2.2 mL,respectively.The contact time of two-phase can be calculated by relating the total flow.