混合澄清槽动态特性的研究(Ⅰ) PRBS 信号干扰下混合澄清槽的动态特性

DYNAMIC CHARACTERISTICS OF THE MIXER——SETTLERS(Ⅰ)DYNAMIC CHARACTERISTICS OF THE MIXER——SETTLERS UNDER PRBS DISTURBING SIGNAL

本文的研究目的是为 Purex 流程1A 萃取槽(混合澄清槽)的控制系统设计提供控制对象的动态特性。文中提出的萃取级联动态机理模型,可以预报各级两相组分的动态响应数据。以此模型为基础,在水相流量和有机相流量的输入参数上加 PRBS 干扰函数,进行动态数学模拟,其结果与相同条件下的中间规模的实测值吻合较好。动态数据测试是在中间规模的空气脉冲式的混合澄清槽上进行的,工艺体系为 UO_2(NO_3)_2+/HNO_3+H_2O/TBP30%+OK。加在输入参数上的 PRBS 信号,由电子计算机的外给定来实现,输出参数由流线仪表连续检测。对测得的大量数据进行了解析,结果令人满意。

The main goal of this study is to offer dynamical characteristics for the design of the control system for 1A mixer-settler of Purex process.The dyna- mic theoretical model of the extractor-cascades given in this paper can pre- dict the dynamic response of the components in the two phases.On the basis of this model,and by adding a PRBS disturbing functiom to the input aque- ous and organic flows,dynamic mathematic simulation can be carried out. Provided that the disturbing signal condition is the same,the error margin between experimental and calculating results is smaller in the organic phase than on the aqueous phase,with an average of about 15% for the former and 20% for the later.The dynamic test has also been carried out in a pilot plant air pulse mixer-settler with a system consisting of UO_2(NO_3)_2+HNO_3+H_2O /TBP 30%+OK,and with PRBS signal produced by computer being added to input parameters,and output parameters being measured continuously via on- line instruments.