The Design and Research of Polyurethane Reactor Monitoring System Based on Kingview and PLC

摘要

In recent years, Polyurethane industry has experienced rapid development, and hundreds of companies have emerged in the industry.As to production control, many companies still use the methods such as instrumental controls and manual feedings, which leading to uncontrollable product qualities and poor production safety.Therefore, how to improve the levels of processing intelligence and automation has become one of the hot topics in polyurethane industry.This work uses the project,the third monitoring system of polyurethane reactor, which committed by Anhui ANLI Artificial Leather Co.,Ltd., as research object to design solutions based on its production process flows and requirements.
　　In consideration of actual production situation, this thesis analyzes and compares characters of paramount computer control systems based on processing requirements and control characteristic of polyurethane reactor, and proposes the DCS control system solution based on PLC and Kingview.The system acquires data through field instruments such as load cells, temperature sensors and transmitters, etc.; performs core control tasks through SIMENS S 7-300 series of PLCs; and controls reactors such as pumps, valves and motors through PLCs.The software Kingview of WellinTech, Inc.is used to design configuration screens in upper computers and is used to perform related screen display and partial control functions with the help of PLCs.The software in upper computers communicates with these PLCs through Industrial Ethernet.Firstly, related concepts of control system of polyurethane reactor are introduced; secondly, the overall system solution design are described in detail; Lastly, circuit designs of system hardware, software programming and reality of configuration screens are given.
　　The designed monitoring system of polyurethane reactor features stable and safe operation performance, safe and easy operability, real time communication and good expandability.it can significantly reduce labor intensy of operators; improve productivity and economic performance of companies.The system stands for state-of-the-art technologies, leading in the industry of the country and has certain reference value to other companies in the industry.

目录

声明

ACKNOWLEDGEMENTS

ABSTRACT

Table of Contents

Chapter 1 Introduce

1．1 Source and Significance of the Subject

1．1．1 Source of the Subject

1．1．2 Research significance

1．2 Introduce of Monitoring System for Polyurethane Reactor

1．2．1 Introduce and Utilities of Polyurethane

1．2．2 Introduce of PET Resin and its Utilities

1．2．3 Introduce of Reactor Monitoring System

1．3 Main Work and Research Achievements

1．3．1 Main contents of the Research Project

1．3．2 Researeh Achievements

1．4 Summary

Chapter 2 Overall solution design of the resin reaetor monitoring system

2．1 Processes of polyurethane production

2．2 Process and Control Requirements of Polyurethane Reactor Control System

2．2．1 Process Requirements of Reactor Monitoring System

2．2．2 Control Requirements of Polyurethane Reactor Control System

2．3 Overall Design of Monitoring System for Polyurethane Reactor

2．3．1 Introduce of Computer Control System

2．3．2 Solution Design and Overall Architecture of the Reactor Monitoring System

2．3．3 Realization of Communication for the Reactor Monitoring System

2．4 Summary

Chapter 3 Hardware circuit design of the monitoring system

3．1 Design of the General Distribution Circuit for the Monitoring System

3．2 Design of Control Circuits for Reactor Motors

3．2．1 Introduce and Selection of Soft Starters

3．2．2 Design of control circuit for soft starter

3．3 Design of Pump Valve Control Circuits for Reactor

3．3．1 Design of Pump Control Circuits

3．3．2 Design of Valve Control Circuits

3．4．PLC Hardware circuit design

3．4．1 Introduce of PLC

3．4．2 Structure Design of PLC Control System

3．5 Design of Reactor Weighing Circuit

3．6 Design of Reactor Alarm Circuit

3．7 Summary

Chapter 4 Software Design of the Monitoring System

4．1 Introduce of STEP 7

4．2 Design of the main program

4．3 Design of Pump Valve Control Program for Reactor

4．4 Design of running indication program for agitating motors

4．5 Design of analog acquisition program

4．6 Program design for alarm circuit

4．7 Summary

Chapter 5 Design of the HMI of the monitoring system

5．1 Overview of configuration software

5．2 Introduce of KingView V6．55

5．3．HMI Configuration

5．3．1 Design of technology screens

5．3．2 Design of curve screen

5．3．3 Design of the archiving screen

5．4 Summary

Chapter 6 Conclusion and future work

6．1 Conclusion

6．2 Future work

References

Appendix