The automatic control system of the reactor is composed of automatic batching design, feed and discharge all controlled by computer, dynamic weighing module, precision amplifier, A/D converter, microcomputer, monitor, printer and execution system. The weight required for various materials is set through the touch screen, and automatically transported to the ingredients in order for automatic weighing and flow control, so as to achieve accurate measurement and batching.

The weighing system of reaction pot is a complete set of automatic equipment for dynamic weighing and batching control through electrical control management and visual man-machine software configuration. According to the process requirements, the weight and flow of the material loaded into the weighing hopper are controlled by the monitoring system and PLC program, so as to achieve accurate measurement and batching. With strong stability and high cost performance, it can provide accurate measurement data and control means for production control and management of various industrial sites.

The mixing and weighing system adopts Siemens PLC, circuit breakers, relays, inverters and terminals, which can complete the equipment automation and process automation control. At the same time, the configuration control means to collect the data and adopt the high-end configuration software as the upper computer, through which commands are issued to manage the automation equipment and process. Standard industrial computer software and hardware platform as an integrated carrier to replace the traditional system, with strong adaptability, openness and good characteristics.

The reaction pot weighing system converts the digital signal into digital signal through internal amplification A/D and transmits the digital signal to the CAN bus through the communication sub-module. The instantaneous flow rate of the material can be measured, and the analog signal from the weighing module and the motor frequency conversion speed regulation can be received in the system, and the instantaneous flow rate and cumulative flow rate can be displayed after integration. At the same time, the instantaneous flow is sent to the computer system with 4~20mA analog current signal as the input signal, and the computer compares the signal with the set value and outputs 4~20mA analog current signal through the inverter to control the speed of the feeding motor, realizing the closed-loop control of the material discharge flow.

The reaction tank weighing system is a process in which two or more kinds of materials are automatically and quantitatively added to the mixing tank according to a certain weight ratio, and the materials are automatically discharged after mixing to meet the predetermined requirements. The electrical signal representing the weight generated by the weighing module and weighing instrument is collected by PLC and computer after the signal amplification module. When the predetermined weight is reached, the PLC drives the motor to open the pneumatic valve of the measuring tank, the material enters the reactor, and the stirring motor is started at the same time. After the stirring reaches the specified time, the discharge port is opened and the material is discharged.

The weighing system of the reaction tank is divided into material storage, batching, metering system and electrical control system, which is mainly composed of PLC, weighing instrument, weighing module and signal distributor. PLC is used to configure the start and stop and the opening and closing of the warehouse door and other switch quantity control, detect the status of the warehouse door and operation configuration, and implement system interlock for the batching system. With the results of weight signal acceptance, fast and slow loading control and self-tuning of overimpulse, it can modify the input and parameters of the material side.

The weighing system provides man-machine interactive interface, and completes the functions of controlling information input, data management, data display, storage, statistics and reporting, etc. The industrial computer inputs the weight of ingredients through the host keyboard, generates the weight of various materials according to the proportion of raw materials, and transmits them to PLC through communication. In the process of batching, dynamic real-time monitoring is carried out, and other switching values in the detection and control system sent by each slave machine are collected regularly, and the weight signals of each material are collected in real time and compared with the given signals to determine the next control scheme, and at the same time, the weight signals are transmitted to the upper computer.

The weighing system starts the industrial computer to send a feeding signal to the PLC, the PLC controls the frequency converter for fast feeding, the weighing sensor sends the weight signal through the transmitter to the PLC, the PLC converts the analog signal into a digital signal, the signal is normalized and quickly added to a certain amount, the PLC controls the frequency converter for slow adding, when the advance amount is reached, the feeding is stopped.

The process of weighing system is mainly the batching metering and feeding process. In batching metering process, firstly, the time of discharging from the material feeder to the metering tank is controlled according to the weighing requirements, so as to control the amount of material entering the metering bin, and then the time of discharging from the feeder to the metering tank is controlled according to the material proportioning requirements, so as to control the weight entering the metering tank, thus completing the weighing process once until the specified weighing times for each batching are completed.