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A system and method for improving the control safety of aluminum electrolytic cell control machine

A technology of aluminum electrolytic cell and cell control machine, applied in the direction of comprehensive factory control, etc., can solve problems such as lifting abnormalities, motor wiring errors, production accidents, etc., and achieve the effect of improving control safety, improving safety, and preventing accidents

Active Publication Date: 2022-05-17
GUIZHOU BRANCH CHINA ALUMINUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a system and method for improving the control safety of the aluminum electrolytic cell control machine. By detecting and comparing the anode lifting command and real-time monitoring of the anode bus action direction on the cell control machine, the lifting contactor adhesion, phase sequence error, and wiring error are eliminated. In order to improve the control safety of the slot control machine to solve or partially solve the existing problems such as the phase sequence error of the 380V power supply in the slot control machine or the motor wiring on the upper part of the slot Mistakes, artificial insanity and lifting operation errors, etc. are not judged and processed online, resulting in technical problems such as abnormal lifting and production accidents

Method used

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  • A system and method for improving the control safety of aluminum electrolytic cell control machine
  • A system and method for improving the control safety of aluminum electrolytic cell control machine

Examples

Experimental program
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Effect test

Embodiment 1

[0071] In this example, on a certain 400KA electrolyzer, the tank control machine collects button signal 4. When a rising key signal change is collected (from 0xff to 0x00), it is judged whether the current tank control machine is performing automatic anode action. If not, enter manual In the rising command state, at the same time, send a positive rising contactor closing command to the command output unit 5 (the hoist power-on setting is 0x00, and the hoist rising setting is 0x00). The sensor signal acquisition unit 3 collects the signal of the forward rotation and reverse rotation detection sensor unit 1 fixed on the upper part 9 of the electrolytic tank, which is the forward rotation signal (0x00), and the sensor signal acquisition unit 3 collects the bus on the upper part 9 of the electrolytic tank The signal of the fixed displacement detection sensor unit 2 changes from 220 to 221, which is an increase signal (0x00). It is judged that the current tank voltage is 4.12V, whi...

Embodiment 2

[0073] In this example, on a 400KA electrolyzer, the tank control machine collects button signal 4, and when it collects a drop button signal change (from 0xff to 0x00), it is judged whether the current tank control machine is performing automatic anode action, and if not, it will enter manual In the state of the descending command, at the same time, an anode descending contactor closing command is sent to the command output unit 5 (0x00 is set when the hoist is powered on, and 0x00 is set when the hoist is descended). The sensor signal acquisition unit 3 collects the signal of the forward and reverse detection sensor unit 1 whose motor shaft is fixed on the upper part 9 of the electrolytic cell, which is the reverse signal (0xff), but the sensor signal acquisition unit 3 collects the upper part 9 of the electrolytic cell The signal of the displacement detection sensor unit 2 fixed on the bus changes from 227 to 228, which is an increase signal (0x00). The lifting sequence dete...

Embodiment 3

[0075] In this example, on a 500KA electrolyzer, the tank control machine collects button signal 4, the rising button signal is not input (0xff), and the falling button signal is not input (0xff). It is judged that the current tank control machine is in the state of automatic rising, and the The command output unit 5 issues a closing command for the anode ascending contactor (0x00 is set when the hoist is powered on, and 0x00 is set when the hoist rises). The sensor signal acquisition unit 3 is collected on the upper part 9 of the electrolytic tank. The signal of the displacement detection sensor unit 2 fixed by the bus is changed from 224 to 225, which is an increase signal (0x00), but the sensor signal acquisition unit 3 is collected on the upper part 9 of the electrolytic tank. The signal of the forward and reverse detection sensor unit 1 with a fixed shaft is a reverse signal (0xff), and the lifting sequence determination module 6 determines that the lifting sequence is wro...

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Abstract

The invention discloses a system and method for improving the control safety of an aluminum electrolytic tank control machine. The anode lift command is combined with the forward and reverse signals and the movement direction of the anode bus bar through detection and comparison of the anode lift command and real-time monitoring of the anode bus action direction on the tank control machine. Comparing the signals, if they are consistent, it means that the anode is operating normally, and if they are inconsistent, it means that the anode is operating abnormally; and compare the anode down command with the forward and reverse signals and the moving signal. By monitoring and eliminating the occurrence of safety accidents such as slotting and pressing of slots due to adhesion of lifting contactors, phase sequence errors, wiring errors, or manual operation errors, the control safety of slot control machines is improved. This method can accurately judge the control abnormality of the tank control machine, detect possible hidden dangers in the electrolytic tank early, prevent accidents in real time, and fundamentally improve the control safety of the tank control machine from the closed-loop detection of the first and last link of the anode lifting control.

Description

technical field [0001] The present application relates to the field of aluminum electrolysis control, in particular to a system and method for improving the control safety of an aluminum electrolysis cell control machine. Background technique [0002] The tank control machine is the most important control equipment in the aluminum electrolysis production process. It controls the material balance and energy balance in the aluminum electrolysis production, and is related to the maintenance of electrolysis operation indicators. The collected signals include tank voltage, series current signal, button signal, and external feedback signals such as upper and lower limit. The control objects include shell valve, feeding valve and anode lifting motor. Among them, the most important thing for the production safety of the electrolysis series is the control of the anode lifting motor. Many safety accidents that have occurred since the production of prebaked electrolytic cells are rela...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25C3/20
CPCC25C3/20Y02P90/02
Inventor 张保伟魏青方斌郭瑜
Owner GUIZHOU BRANCH CHINA ALUMINUM IND