Multi-mode Distributed Control Electrolyzer Control System Based on PLC

Abstract

The invention relates to a PLC-based multi-mode collection and distribution control electrolytic cell control system for electrolytic aluminum engineering. The multi-mode distributed control electrolytic cell control system based on PLC is composed of the following structure: PLC is used to receive the signals collected by the remote I / O acquisition module and process them to the anode lifting control module and shell cutting control module ; The I / O acquisition module is used to collect the signal of the electrolytic cell and transmit it to the PLC; the anode lifting control module is used to receive the control signal of the PLC; the shelling and cutting control module is used to receive the control signal of the PLC. Advantages and effects of the present invention: one PLC can control multiple electrolyzers, a remote I / O acquisition module is set on each electrolyzer, and the remote I / O communicates with the PLC data through a communication cable, so that both the electrolyzer and the electrolyzer can be reduced. A large number of cable connections between slot control machines improve control reliability.

Description

technical field [0001] The present invention relates to a Control systems for electrolyzers, especially related to For electrolytic aluminum engineering Multi-mode Distributed Control Electrolyzer Control System Based on PLC , it can set several control modes according to the control requirements of the electrolyzer, and detect the working status of the electrolyzer on-line, intelligently control and adjust the working status of the electrolyzer to make it work in the best state, and has the function of automatically and manually handling abnormal accidents. Background technique [0002] The electrolytic aluminum production system is a typical large-capacity DC power load. The entire process production system is a very complex and huge system composed of a rectifier device composed of multiple units connected in parallel and hundreds of electrolytic cells connected in series. Each electrolytic cell It is a relatively independent production unit, and its control, operation,...

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Problems solved by technology

[0002] The electrolytic aluminum production system is a typical large-capacity DC power load. The entire process production system is a very complex and huge system composed of a rectifier device composed of multiple units connected in parallel and hundreds of electrolytic cells connected in series. Each electrolytic cell It is a relatively independent production unit, and its control, operation, and management are very complicated. In the production process, only when each electrolytic cell is in a stable working state can the entire electrolytic DC system work in good condition. However, modern large-scale prebaked electrolytic cells It is in a closed state during normal production, and it cannot be controlled, operated, and managed manually. Only automatic control devices can be used to realize the feeding, batching, aluminum level, pole distance, aluminum output, and anode effect of the electrolytic cell. Control management. At present, in the field of electrolytic cell control in China, the unitary cell control machine developed on the basis of single-board computer is used. That is, each electrolytic cell is equipped with a cell control machine, and each electrolytic production system is equipped with a large-scale There are many disadvantages in this system: 1) The on-site modification work program and interface performance of the unitary slot control machine developed on the basis of the single-board computer is poor, and the quality is difficult to guarantee; 2) The performance is poor when working independently; 3) Each tank controller can only control one electrolyzer; 4) It needs a powerful background computer system to support it, which seriously restricts its performance and application

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