In order to address the issues of large dosing deviations,low dosing efficiency,and low level of automation in water treatment plants,a PLC-controlled automated dosing system is designed.The control principle of the dosing system is based on expert experience,setting the dosage range for regulation,and combining it with the hardware of Siemens S7-1200 PLC and HMI for the de-sign of the dosing system.The experimental comparison results show that the coagulation effect of the PLC dosing system is good,a-chieving automatic control and real-time monitoring of the dosing amount by the dosing system.
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