A real-time monitoring system for copper-arsenic sulfidation separation in a copper electrolyte purification process, comprising a first stage sulfidation reaction tank, a second stage sulfidation reaction tank, and a third stage sulfidation reaction tank, wherein the system further comprises a PLC reaction control module, a first stage sulfidation real-time monitoring module, a second stage sulfidation real-time monitoring module, a third stage sulfidation real-time monitoring module, and a hydrogen sulfide inlet valve and sulfidation liquid outlet valve;
- wherein the PLC reaction control module comprises a first stage sulfidation copper-arsenic reaction closed-loop control module, a second stage sulfidation copper-arsenic reaction closed-loop control module, and a third stage sulfidation copper-arsenic reaction closed-loop control module;
- the first stage sulfidation copper-arsenic reaction closed-loop control module is in communication and electrical connection with the first stage sulfidation real-time monitoring module and the hydrogen sulfide inlet valve and sulfidation liquid outlet valve, and is configured to retrieve copper and arsenic ion concentrations of the first stage sulfidation real-time monitoring module in real time, and to interlock a first stage sulfidation reaction tank hydrogen sulfide inlet electromagnetic valve in the hydrogen sulfide inlet valve and sulfidation liquid outlet valve to close and a first stage sulfidation reaction tank sulfidation liquid outlet ball valve in the hydrogen sulfide inlet valve and sulfidation liquid outlet valve to open when analyzing and determining a critical point where the arsenic ion concentration slightly decreases in a first stage sulfidation process, thereby terminating the reaction;
- the second stage sulfidation copper-arsenic reaction closed-loop control module is in communication and electrical connection with the second stage sulfidation real-time monitoring module and the hydrogen sulfide inlet valve and sulfidation liquid outlet valve, and is configured to retrieve copper and arsenic ion concentrations of the second stage sulfidation real-time monitoring module in real time, and to interlock a second stage sulfidation reaction tank hydrogen sulfide inlet electromagnetic valve in the hydrogen sulfide inlet valve and sulfidation liquid outlet valve to close and a second stage sulfidation reaction tank sulfidation liquid outlet ball valve in the hydrogen sulfide inlet valve and sulfidation liquid outlet valve to open when analyzing and determining a critical point where the copper ion concentration decreases to near zero in a second stage sulfidation process, thereby terminating the reaction;
- the third stage sulfidation copper-arsenic reaction closed-loop control module is in communication and electrical connection with the third stage sulfidation real-time monitoring module and the hydrogen sulfide inlet valve and sulfidation liquid outlet valve, and is configured to retrieve copper and arsenic ion concentrations of the third stage sulfidation real-time monitoring module in real time, and to interlock a third stage sulfidation reaction tank hydrogen sulfide inlet electromagnetic valve in the hydrogen sulfide inlet valve and sulfidation liquid outlet valve to close and a third stage sulfidation reaction tank sulfidation liquid outlet ball valve in the hydrogen sulfide inlet valve and sulfidation liquid outlet valve to open when analyzing and determining a critical point where the arsenic ion concentration decreases to a limit value in a third stage sulfidation process, thereby terminating the reaction;
- the first stage sulfidation real-time monitoring module) is mounted at the first stage sulfidation reaction tank, and configured to monitor the changes in copper and arsenic ion concentrations over time in the first stage sulfidation process, with a focus on monitoring the critical point where the arsenic ion concentration starts to slightly decrease, wherein a corresponding reaction time of the critical point is a reaction endpoint draining time;
- to monitor a variation of the copper ion over sulfidation time from liquid inlet to liquid outlet and a variation of the arsenic ion over the sulfidation time from liquid inlet to liquid outlet in real time, and transmit data to the first stage sulfidation copper-arsenic reaction closed-loop control module in the PLC reaction control module in real time;
- the second stage sulfidation real-time monitoring module is mounted at the second stage sulfidation reaction tank, and configured to monitor the changes in copper and arsenic ion concentrations over time in the second stage sulfidation process, with a focus on monitoring the critical point where the copper ion concentration decreases to near zero, wherein a corresponding reaction time of the critical point is the reaction endpoint draining time;
- to monitor the variation of the copper ion over the sulfidation time from liquid inlet to liquid outlet and the variation of the arsenic ion over the sulfidation time from liquid inlet to liquid outlet in real time, and transmit data to the second stage sulfidation copper-arsenic reaction closed-loop control module in the PLC reaction control module in real time;
- the third stage sulfidation real-time monitoring module is mounted at the third stage sulfidation reaction tank, and configured to monitor the changes in copper and arsenic ion concentrations over time in the third stage sulfidation process, with a focus on monitoring the critical point where the arsenic ion concentration decreases to the limit value, wherein a corresponding reaction time of the critical point is the reaction endpoint draining time;
- to monitor the variation of the copper ion over the sulfidation time from liquid inlet to liquid outlet and the variation of the arsenic ion over the sulfidation time from liquid inlet to liquid outlet in real time, and transmit data to the third stage sulfidation copper-arsenic reaction closed-loop control module in the PLC reaction control module in real time;
- the hydrogen sulfide inlet valve and sulfidation liquid outlet valve comprises the first stage sulfidation reaction tank hydrogen sulfide inlet electromagnetic valve and the first stage sulfidation reaction tank sulfidation liquid outlet ball valve, the second stage sulfidation reaction tank hydrogen sulfide inlet electromagnetic valve and the second stage sulfidation reaction tank sulfidation liquid outlet ball valve, and the third stage sulfidation reaction tank hydrogen sulfide inlet electromagnetic valve and the third stage sulfidation reaction tank sulfidation liquid outlet ball valve;
- the first stage sulfidation reaction tank hydrogen sulfide inlet electromagnetic valve and the first stage sulfidation reaction tank sulfidation liquid outlet ball valve are mounted at the first stage sulfidation reaction tank, and are correspondingly opened and closed in response to an instruction from the first stage sulfidation copper-arsenic reaction closed-loop control module in the PLC reaction control module;
- the second stage sulfidation reaction tank hydrogen sulfide inlet electromagnetic valve and the second stage sulfidation reaction tank sulfidation liquid outlet ball valve are mounted at the second stage sulfidation reaction tank, and are correspondingly opened and closed in response to an instruction from the second stage sulfidation copper-arsenic reaction closed-loop control module in the PLC reaction control module;
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- the third stage sulfidation reaction tank hydrogen sulfide inlet electromagnetic valve and the third stage sulfidation reaction tank sulfidation liquid outlet ball valve are mounted at the third stage sulfidation reaction tank, and are correspondingly opened and closed in response to an instruction from the third stage sulfidation copper-arsenic reaction closed-loop control module in the PLC reaction control module.