Bath voltage safety interlocking control device for ionic membrane caustic soda electrolytic bath

Abstract

The invention discloses a bath voltage safety interlocking control device for an ionic membrane caustic soda electrolytic bath, and relates to the technical field of electrolytic bath voltage safety control. The bath voltage safety interlocking control device comprises the electrolytic bath, a control cabinet and a DSC control room, wherein the control cabinet and the DSC control room are electrically connected with the electrolytic bath in sequence; a control cabinet wiring area, a remote IO, a human-computer interface and a control PLC are arranged on the control cabinet; a control PLCCPU module, a first control PLC MODBUS communication module, a second control PLC MODBUS communication module and a control PLC DO output module are arranged on the control PLC; the electrolytic bath is composed of a plurality of unit cells; and a TB-1 electrolytic bath group voltage measurement wiring terminal is used for connecting a wire to a remote IO voltage acquisition module to realize acquisition of voltage signals of each group of voltage cells. According to the cell voltage safety interlocking control device, the driving process and normal operation safety of the electrolytic bath are protected through the three groups of alarm interlocking control schemes, and the monitoring of the safe operation condition of the electrolytic bath by a central control personnel is facilitated.

Description

technical field [0001] The invention belongs to the technical field of cell voltage safety control of an electrolyzer, in particular to a cell voltage safety interlock control device for an ion-exchange membrane caustic soda electrolyzer. Background technique [0002] The voltage detection of the existing ionic membrane caustic soda electrolyzer adopts artificial periodic detection. The disadvantages of this scheme include: 1. The electrolytic cell is a high-current device, and manual detection is a high-risk operation, and safety cannot be guaranteed; 2. The voltage data error of the manual detection cell is relatively large; 3. The manual detection cell voltage data record is incoherent. Voltage and voltage changes cannot be sensed in time; 4. Manual detection cannot be used as safety interlock control, which is passive detection; 5. Manual detection of electrolyzer voltage requires a large amount of on-site human resources and high labor costs; therefore, to solve the abo...

AI Technical Summary

Problems solved by technology

[0002] The voltage detection of the existing ionic membrane caustic soda electrolyzer adopts manual periodic detection

The disadvantages of this scheme include: 1. The electrolytic cell is a high-current device, and manual detection is a high-risk operation, and safety cannot be guaranteed; 2. The voltage data error of the manual detection cell is relatively large; 3. The manual detection cell voltage data record is incoherent. Voltage and voltage changes cannot be sensed in time; 4. Manual detection cannot be used as safety interlock control, which is passive detection; 5. Manual detection of electrolyzer voltage requires a large amount of on-site human resources and high labor costs; therefore, to solve the above problems, an ion The voltage safety interlock control device of membrane caustic soda electrolyzer is of great significance

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