高通量核用SDMS-350-8型单台多级离心萃取器的水力学性能  

Hydraulics Performance of SDMS-350-8 Single-multistage CentrifugalExtractor with High Flux for Nuclear Applications

作　　者：邢运曈 杨昕未 陈勇 王博 XING Yuntong;YANG Xinwei;CHEN Yong;WANG Bo(China Nuclear Power Engineering Co.,Ltd.,Beijing 100840,China)

机构地区：[1]中国核电工程有限公司,北京100840

出　　处：《原子能科学技术》2024年第6期1297-1303,共7页Atomic Energy Science and Technology

摘　　要：离心萃取器作为萃取设备的一种,具有传质效率高、料液停留时间短等优点,然而现有的单台单级离心萃取器通常占地面积较大。为了在控制厂房面积的前提下满足后处理厂通量需求,本研究设计加工了一台转鼓直径为350 mm、总级数为8级的高通量核用SDMS-350-8型单台多级离心萃取器,该萃取器可实现单台设备内的多级离心萃取。基于实际应用工况,以HNO3和30%TBP-煤油为体系,开展了水力学性能实验,研究了转鼓转速、重相堰板尺寸、搅拌桨尺寸对SDMS-350-8型单台多级离心萃取器水力学性能的影响。结果表明:SDMS-350-8型离心萃取器的合适转速范围为1400~1600 r/min,低于1400 r/min时,其难以在需要的流比(200/800)下建立稳定的水力学运行状态,而随着转速的提高,两相夹带量会逐渐提高;不同重相堰板尺寸适用于不同流比,半径113 mm的重相堰板适用于1/5~1/3的流比,半径110 mm的重相堰板适用于1/1~2.5/1的流比,半径107.5 mm的重相堰板适用于5/1的流比;将搅拌桨半径由118 mm提高到122 mm,最大处理通量可达1600 L/h。以上结果表明,所研发的SDMS-350-8型单台多级离心萃取器具有处理通量大、操作范围广、水力学性能好的优点,具备应用于核工程的潜力。Reprocessing of nuclear fuel to achieve closed nuclear fuel cycle can effectively improve the utilization efficiency of nuclear fuel.At present,the nuclear fuel reprocessing process that has been realized engineering application is to separate different metal ions by using different partition coefficients of metal ions in extractants.Therefore,extraction equipment is the key core equipment in the field of nuclear fuel reprocessing.The centrifugal extractor has the advantages of high mass transfer efficiency and low hydraulic retention time,but the existing single-stage centrifugal extractor usually occupies a large area,which leads to expensive plant construction costs.In order to meet the throughput requirement of the reprocessing plant under the premise of minimizing the plant area,in this study,a high flux SDMS-350-8 multistage centrifugal extractor with a drum diameter of 350 mm and a total number of stages of 8 was designed and manufactured,which can realize multistage centrifugal extraction in a single device.Based on the engineering application conditions,the hydraulic performance experiments were carried out with HNO3 aqueous solution and 30%TBP-kerosene.The effects of the drum rotating speed,heavy phase weir plate semidiameter and mixing paddle size on the hydraulic performance of SDMS-350-8 multistage centrifugal extractor were studied.The results show that the suitable drum rotating speed range of SDMS-350-8 centrifugal extractor is 1400-1600 r/min,when it is lower than 1400 r/min,it is difficult to establish a stable hydraulic operation state under the required flow ratio(200/800).With the increase of drum rotating speed,the two-phase entrainment will gradually increase.The effects of heavy phase weir plate semidiameter and flow ratio on the maximum treatment flux of SDMS-350-8 centrifugal extractor were studied.In addition,it is found that different aqueous phase weir plate semidiameters are suitable for different flow ratios.The aqueous phase weir plate with 113 mm semidiameter is suitable for the f

关 键 词：离心萃取器 单台多级 水力学性能 

分 类 号：TL99[核科学技术—核技术及应用] TQ021.4[化学工程]