The reactor batching machine is divided into manual control and automatic control through the newly installed transfer switch. The equipment is controlled on the original operating platform to prevent the shutdown of the reaction tank due to the failure of PLC hardware and software; When the equipment and PLC are working normally, the automatic control mode is used to control and monitor the equipment through the PLC. Automatic control is divided into centralized automatic and centralized manual, and a single device is selected on the man-machine screen of the upper computer. When selecting centralized automatic, it is controlled by the PLC user program, and when selecting centralized manual, it can centrally start and stop (or switch) a single device on the man-machine screen. When all the equipment works in the centralized automatic mode, the automatic control of the sequence can be realized. When the program runs normally, click the "loading" button on the man-machine screen, the vibrating screen starts to load the material into the hopper, and automatically stops after reaching the set value; Then click the "cut material" button, and the hopper will cut material to the tank; Then the program will automatically control the equipment in sequence: left (right) middle bin door open, left (right) middle bin door close, left (right) car running, skip over the small clock check point small clock open, small clock close, large clock open, large clock close, put the probe, lift the probe.

Among them, the module collects the instantaneous weighing value of the hopper, the vibrating screen has excess vibration, the instantaneous weighing value and the full point setting value of the man-machine screen, the pre-full setting value is the residual vibration amount, and the setting is compared according to the accumulated experience. When the above value is reached, the vibrating screen automatically stops, and the full point setting value is reached through the residual vibration, so as to achieve the accurate loading according to the proportioning ratio. The instantaneous position value of the probe is collected, and then compared with the set value, so as to judge the material condition of the reaction tank, whether the material is deficient or excessive. At the same time, the necessary electrical interlock is carried out on all the electrical equipment to ensure the normal operation of the equipment and production safety. The electrical interlock of the equipment ensures safety and prevents equipment damage and safety accidents caused by various improper operations.

For the temperature control of the reactor, through the temperature control experience of the previous optimal stability project and the actual situation of the site, the temperature of the polymerization reactor adopts control and PID control, that is, adopts FUZZY-PID dual-mode control scheme, when the temperature error is outside a certain calibration value, the control is used to obtain good transient performance; When the temperature error is within the range of the calibration value, PID control is used to obtain good steady-state performance. The FUZZY-PID composite control method has higher steady-state accuracy than the simple control, and ensures the temperature condition of the reaction to a greater extent, and obtains a better effect than PID control.

For on-site division of labor, You Win DCS uses its flexible human-computer interaction function and powerful extended communication function to communicate with dozens of touch screens on site through Modbus, realizing the specific operation of the field end, and the central control room is responsible for the global control and monitoring of the operation of the division section. Through the powerful function of You Win DCS, the field authority is clear and the division of labor is careful. Reduces human error and ensures smooth and efficient production.

For the ratio drip adjustment after weighing to flow rate, after many tests by the Youstable engineering team, it is necessary to deal with the real-time disturbance of on-site weighing and the lag problem of flow regulation after conversion, so the "segmentation" control strategy combining double layer filtering, quantitative, constant speed and timing is adopted to solve this kind of complex control problem of pure lag, ensuring the production needs of the owner at the same time. The cost of upfront investment is saved.