The dosing system is suitable for petroleum, chemical and proportioning industries. The quantitative liquid dosing system is based on computer technology, control technology, communication technology and graphic display technology (4C technology). The automatic weighing Batching system connects the on-site control stations, control management stations, detection stations, operation management stations and engineer stations distributed in the industrial site (near) through the communication network to jointly complete the integrated control system of decentralized control and centralized operation and management. Through a unified monitoring interface, dynamic data of each monitoring environment is automatically collected, and various reports and schedules are formed based on the monitoring data to facilitate service statistics and query. The powerful query function can query user records and reports by ticket number, station number, user code, vehicle number, etc. On this basis, the system will also form a complete business information feedback and supervision and control mechanism, providing a strong support for enterprises to conduct scientific management and decision-making.

The variable frequency speed control loop of the feeding system is composed of the double closed loop spiral scale, computer integrator, frequency converter, AI-808 regulator, star Feeder, screw conveyor, etc. Inverter selection Delta VFD015A43B, it is mainly used to control the feed of the star feeder, the spiral scale detects the material flowing through the conveyor, and transmits the signal to the computer integrator, the computer integrator sends 4 ~ 20mA analog signal to the regulator, the regulator sends two 4 ~ 20mA analog signals, all the way to the DCS system, Multiply it by the coefficient K as the target value of the second closed loop; The other is transmitted to the frequency converter, and the V/F value of the frequency converter is adjusted by the regulator to adjust the speed of the star feeder, so as to ensure that the powder flowing through the screw conveyor is more uniform, and the purpose is to produce a more stable and accurate flow rate; The second closed-loop control is to adjust the amount of dispersant according to the amount of the first way of transmission, so that the amount of dispersant changes with the amount of powder, on the one hand to ensure the normal operation of the regulator, on the other hand to ensure that the powder and the dispersant are mixed in a certain proportion to ensure the accuracy of the ratio, so as to ensure the quality of the mixture and improve the reliability of the system.

According to the dosing list remotely issued by the database management center through the network, the system automatically calculates the quantity of each raw material through the formula parameters of the corresponding brand in the formula library and sends it to the central controller. The central controller collects and accumulates the pulse signal of weighing accordingly, so as to automatically control the discharge of raw material reaction tank to the modulating reaction tank. The deviation caused by the pipeline system can be automatically compensated by software. The prepared feed liquid can be transported to the storage reaction tank. By collecting the analog signal of the temperature transmitter and receiving the set temperature value sent by the computer, the dynamic digital display and heat preservation function of the temperature can be realized. To realize "brand tracking" for the brand, that is, the brand code of the modulating reaction tank is sent to the storage reaction tank of the current feed to show the grade of its feed liquid. After the discharge of the modulating reaction tank, the brand code of the modulating reaction tank is eliminated. The central controller implements automatic search of the reaction tank and first-in-first-out according to the material signal and production grade on site. Firstly, according to the production grade, the storage reactor of this grade is automatically found. If there are multiple storage reaction tanks of the same grade, the first in first out is realized according to the "sequential queue".