The Research On Control System Of Vacuum Belt Dryer Based On Adaptive Correction

Vacuum belt dryer is a contact type vacuum drying equipment of continuous feed and continuous discharge under the vacuum sealed environment, continuous material form. Because of its wide scope of application, short drying time, energy saving, continuous operation, high product quality characteristics, it is highly concerned in recent years. But the developmental time of the vacuum belt dryer in domestic is short, there are still some problems:One is the control level needs to be improved, automatic control technology can’t combine with the vacuum belt dryer reasonable; two is the coordinated control between each equipment unit of the vacuum belt dryer can’t be very good; three is the belt deviate, a lot of vacuum drying equipment domestic although adopts automatic rectification, but the rectification accuracy is low and often appear error correcting. Therefore, to construct the control system of vacuum belt dryer based on adaptive correction is very important for improving the quality of products and production efficiency.On the basis of understanding the current situation of the vacuum belt dryer control technology and vacuum belt dryer process both at home and abroad, and according to the control demand of Xiuzheng pharmaceutical Limited by Share Ltd production line and the characteristic of the material, this topic has designed the detection and monitoring scheme and construct the vacuum belt dryer monitoring system based on IPC+PLC. On the premise of the research on vacuum belt dryer object characteristics, this topic has designed the automatic control system with PLC as core, including the PLC hardware selection, electrical wiring design and the vacuum belt dryer PLC program design.To study on vacuum belt dryer adaptive rectification technology, and aiming at the vacuum belt dryer vacuum environment of high temperature and high humidity, this topic has determined the control idea and the control method of adaptive correction, constructed adaptive correcting control system with PLC as core and complete the program of adaptive correction system.Using WinCC to develop the vacuum belt dryer monitoring software, has realized the real-time monitoring of the entire production process of vacuum belt dryer and the field data acquisition and storage, and has user management, trend chart, alarm and other functions, trace easily the operation and process.To research on cloud platform technology design, this topic has determined the composition of the vacuum belt dryer cloud design platform and constructed the system structure of vacuum belt dryer cloud design platform. Then discussed the design of database and interface of the dryer cloud platform of the vacuum belt.The system has been running in the production workshop of Xiuzheng pharmaceutical Limited by Share Ltd, the system is running stable. Adaptive correction system and monitoring platform are used to good effect and ensuring the vacuum belt type drying machine operation is stable and reliable and meeting the users’requirements.