摘要
本工作模拟实际的生产过程，用计算机仿真实验研究了八组份体系稀土萃取分离的动态过程。整个李取槽从启动达到平衡约需十个排级比的时间（约１２０小时），但两相出口产品则在不到两个排级比的时间内就先后都达到了９９．９９％的纯度。萃取槽能处于不同的平衡态，研究了不同平衡态下两相出口产品的纯度和各组份在萃取槽的积累量以及存在的积累峰现象。对所谓“无效区”的现象进行了讨论，并提出了消除“无效区”的方法。研究了输入变量扰动下萃取槽的开环响应和料液组份变动时前馈控制下的开环响应，得到了优化的前馈控制方案，并为反馈控制方案的设计提供了依据。
he dynamic behavoir of an 8-component solvent extraction system has beenstudied by means of computer process simulation based on the constant mixed extraction factor hypothesis.AG ratio(the ratio of number of transfers to the number of stages)of about 10G is required to bring a systemfrom start up to a steady state operation,But long before steady state is approached, with AG ratlo of notmore than two, the purity of products coming out from both ends of the extraction battery may reach fournine. Solvent extraction systems may be brought to steady state in different paths,therefore giving differentsteady state distributions,differing in product quality,component accumulation and position of accumulationpeaks,The phenomenon of ineffective zone and its eliminating ways have been discussed.Based on a sttidy ofthe open loop response to a disturbance in input variablets,such as the fluctuation of feed composition,an op-timized feed forward control scheme has been obtained and tested.The mentioned preliminary work has alsoprovided the design basis with a feed backward control scheme.
出处
《稀土》
EI
CAS
CSCD
1995年第3期20-27,41,共9页
Chinese Rare Earths
