The weighing reactor control system is a very important process in the production technology of fine chemical enterprises and is composed of a Weighing system. Under the control of the main control microcomputer system, the batching machine places the liquid raw materials in the reaction kettle for stirring to form the formula raw materials. The main tasks include weighing and proportioning the main ingredients and various supplementary materials, stirring and mixing the supplementary materials, and then grouping and classifying them for filling. The measurement of weighing and packaging has been achieved.

The Batching system adopts a DCS distributed control mode and selects Siemens S7300PLC to form a data acquisition and control system. It features a modular design, which is economical and practical. The human-machine interface monitoring software adopts the leading configuration software "Kingview" in the domestic industrial control field, which has the advantages of good openness, ease of user maintenance and secondary development. All process control data and equipment operation status of the system can be centrally managed, recorded in real time, printed and consulted at any time. It is composed of a computer, a cabinet and peripheral equipment (weighing reactor, pneumatic control valves, transfer pumps, etc.).

The batching control system is composed of a computer as the human-machine interface of the entire system. It is equipped with a master station to complete all system parameter Settings, process monitoring, and data recording. Another weighing touch control instrument serves as a slave station, relying on the master station to manage the data setting and process monitoring of the subsequent quantitative batching. The main station communicates directly with the Siemens S7300PLC system and the automatic touch control instrument. Sealed junction boxes are adopted on site, which are dust-proof and moisture-proof, ensuring reliable signal transmission. A dedicated industrial process touch control instrument is adopted, which communicates with the central control room through the RS-485 bus. It can not only be independently controlled but also be connected to the PLC for control of each valve position and the position signal detection of the unloader. Load cells are used, featuring contactless, anti-interference, anti-dust and moisture-resistant properties. The silo position adopts a heavy hammer type level gauge, which can achieve continuous position detection.

The automatic batching system is equipped with functions such as human-machine interaction, communication, display and storage, and printing. It also features various operational interfaces including data and graphic display, status monitoring, data input, and information storage. It can achieve real-time process data monitoring, simulated display of process flow, real-time data record review, system operator permission setting, process parameter setting, setting of operation process event alarm and manual and automatic control switching. The on-site control instruments display the flow rate, load, cumulative value, temperature, etc. in real time. The temperature indication is transmitted to the central control room through the on-site temperature display instrument, and the pressure indication is transmitted through the on-site pressure display instrument and the current of the motor to the on-site display instrument for centralized display. The frequency converter regulation is equipped with an automatic toggle switch to communicate with the main control computer.