Aluminum electrolysis cell equivalent circuit model based electrode distance measuring method and system

Abstract

The invention provides an aluminum electrolysis cell equivalent circuit model based electrode distance measuring method and system with the object to the accuracy in measuring the electrode distance value. The method is performed through the following steps: acquiring the frequency characteristic data of a single anode rod of the aluminum electrolysis cell and processing the data to obtain a transfer function for the single anode rod of the aluminum electrolysis cell; building an aluminum electrolysis cell equivalent circuit model wherein the frequency domain impedance of the aluminum electrolysis cell equivalent circuit model is identical to the mathematical expression of the single anode rod of the aluminum electrolysis cell; obtaining a transfer function for the frequency domain impedance of the equivalent circuit model, building an equation based on the transfer function for the frequency domain impedance of the equivalent circuit model and the transfer function for the single anode rod of the aluminum electrolysis cell to obtain an expression for the equivalent capacitance contained in the equivalent circuit model; and obtaining the electrode distance value based on the relationship between the equivalent capacitance contained in the equivalent circuit model and the electrode distance. The system and the method can be used in the technical field of aluminum electrolytic monitoring.

Description

technical field [0001] The invention relates to the technical field of aluminum electrolysis monitoring, in particular to a pole distance measurement method and system based on an equivalent circuit model of an aluminum electrolytic cell. Background technique [0002] The most important stage of aluminum production is completed in the aluminum electrolytic cell, so the production management and production operation of the aluminum electrolytic cell become one of the important tasks. The aluminum electrolytic cell is a multivariable coupling, time-varying and large-lag industrial process object. Its own complex physical and chemical processes and the interference of various external conditions and operations have formed complex and changeable working conditions, which poses a threat to production. Operation presents many difficulties. Therefore, the control of the electrolyzer is particularly important. [0003] Among all the factors that affect the stability of the aluminu...

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Problems solved by technology

This device can obtain the real-time pole distance of each area of ​​the electrolytic cell online, but its operation is relatively complicated, and the equipment used is difficult to promote on-site in aluminum electrolytic plants

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