The Pressure weighing system of the reaction vessel converts the on-site temperature and weight into A 4-20mA current signal through the temperature transmitter and weighing instrument, and transmits it to the analog input port of the PLC. The A/D converter then converts the current signal into a digital quantity. After the CPU's operation processing and range conversion, the actual temperature and real-time weight inside the reaction vessel are obtained. Then, the obtained temperature and weight values are fed back to the PLC controller, and the measured values and the set values are subjected to PID operation to obtain the corresponding control quantity. After being converted into A 4-20mA current signal by the D/A converter, it is output to the actuator (intake regulating valve) to change the opening degree of the intake regulating valve, thereby achieving automatic regulation of the temperature and actual capacity inside the reaction vessel.

The distillation tank weighing system adopts a computer with stable performance to complete the data acquisition and communication processing, which is convenient to provide processing accuracy and cost reduction, and the data output and management are carried out through the COM communication interface of the computer itself; Mitsubishi F900 touch screen is chosen to replace the conventional weight indicator to do the human-machine interface, which makes the programming of the interface between PLC and weight indicator become simpler, and enables the display function to be enhanced. The weighing system is to add two or more kinds of materials to the mixing tank automatically according to a certain weight ratio, and then automatically discharges the materials after mixing to meet the predetermined requirements.

The weighing system of the reaction tank is transmitted to the central control room for centralized monitoring and management through high-speed network, and the host computer of the central control room also transmits control commands to the PLC measurement and control terminal through high-speed network to implement decentralized management of each unit. Integrating computer technology, automatic control, communication technology, weighing technology as a whole, its control function is perfect, display, operation is centralized, data processing is convenient, installation, maintenance is simple, the system is easy to expand.

According to the predetermined formula, the measuring reaction tank will add a variety of materials into the weighing hopper according to the fixed proportion weight value. When the weighing is displayed to the amount, the materials will be discharged into the inlet of the mixing machine once or several times in steps according to the unloading procedure. It is also possible to control the weight and flow of the material loaded into the weighing hopper through the monitoring system and PLC program, so as to achieve accurate metering and batching. The system has strong stability and high cost performance, and can provide accurate measurement data and control means for production control and management of various industrial sites.

Measurement Weighing reactor refers to the built-in at least one dedicated embedded microprocessor, and has digital calculation, digital communication weighing, temperature control, liquid level control and other control forms. It is composed of hardware and software, programming technology, fieldbus access and embedded operating system, and other aspects of the application of ingredients to further expand the function, so that ingredients not only have automatic measurement, data processing and simulation of artificial intelligence functions, but also have remote measurement, remote download software upgrade, configuration and hardware reconstruction functions.