The design and processing scale of the project is 20T/d, and the system selects advanced programmable controller to complete the collection and mutual transmission of data, which can ensure the unity of the system as a whole and the independence of the operation of a single device. At the same time, it can also save a large number of connecting cables from various equipment to the main control cabinet, greatly reduce the risk of wiring errors and disconnections, and significantly save maintenance and repair costs. The RO device and pump start and stop in the system can be operated automatically by PLC (programmable logic controller), or manually controlled. The PLC operation mode can be centrally controlled, reduce misoperation, reduce the influence of human factors, and improve the safety, reliability and stability of system operation.