Method for controlling content ranges of components in rare earth extraction and separation process

Abstract

The invention provides a method for controlling content ranges of components in a rare earth extraction and separation process. The method comprises the steps of establishing an echo state network model of the rare earth extraction process based on the characteristics of the flow rate / component content process control of the rare earth extraction and separation process; and putting forward a method for controlling the content ranges of multiple components in rare earth extraction and separation by generalized prediction to realize content range control of multiple components in rare earth extraction and separation. The traditional method adopts a soft measurement model (a static model) in extraction process equilibrium state, which cannot realize the online prediction of the contents of the components in the extraction process easily and cannot establish a precise control model easily, so as to affect the tracking control effect of the rare earth component contents. According to the control method provided by the invention, adjustment is implemented according to the range control strategy, and the calculation is optimized to obtain the accurate control amount of the rare earth extraction process, so that the component content of the rare earth extraction process meets the range control requirements, and the quality of the products at both ends is ensured. The method provided by the invention is suitable for modeling and optimizing control of the rare earth extraction process.

Description

technical field [0001] The invention relates to component content interval control in a multi-component rare earth extraction and separation process, and belongs to the field of rare earth hydrometallurgical process control. Background technique [0002] Rare earth is a non-renewable resource and an indispensable and important element for the development of high technology. It plays an important role in economic and social development. The detection and control of the content distribution of various components in the rare earth extraction process and the purity of the export products at both ends have always been the core and difficult problem in the field of rare earth hydrometallurgical process research. Realizing the optimal control of the content distribution of components at all levels in the rare earth extraction process has important practical significance for stabilizing the production process, improving product quality, reducing energy consumption of raw materials, ...

AI Technical Summary

Problems solved by technology

However, the rare earth extraction process is a complex multi-variable, large-delay, nonlinear dynamic system, and it is difficult for the PID algorithm to obtain ideal results.

Based on fuzzy control, expert system and robust adaptive control and other intelligent control algorithms of rare earth extraction process, it has achieved better control effect than PID, but fuzzy control method and expert system control method are mainly to simulate the actual experience of experts, when the extraction industry runs When the environment changes or is subject to random disturbances, it is difficult to adjust online; the robust adaptive controller is designed from the perspective of global stability and ignores the system dynamic performance

In addition, the above-mentioned control method mainly takes the set value of the component content of the monitoring point in the extraction section or the washing section as the control target, but does not involve the interval control of the rare earth extraction and separation process.

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