Introduction of the application case of Advantech industrial computer in the coking monitoring system, and analysis of the main components and characteristics of the Advantech industrial control product system adopted in the case list.
1. Introduction to the scenery
The coking monitoring and gas delivery system of Xugang Coking Plant requires the pressure of the two coke ovens to be 90 plus or minus 30Pa, and a large amount of data must be kept for analysis. Because the pressure of the two coke oven gas collecting pipes is controlled by the adjustment of the opening degree of the two pneumatic valves and the pressure of the main pipe, the pressure of the main pipe is controlled by the Fuji inverter speed control, the two coke oven gas collecting pipes and the gas main pipe are F-shaped, if manual adjustment is adopted Mastering the pressure and flow is not only cumbersome, but also has a large deviation, and becomes excessive power, and the system ages rapidly. The rapid development of computer technology has opened up a vast development space for industrial automation. Users can easily and quickly build a high-quality and efficient monitoring system, and experience the use of remote monitoring and diagnosis, dual-computer hot backup and other technologies to make the system more secure. Reliable, this system adopts Advantech industrial computer, frequency converter and configuration software to form constant pressure coking monitoring and gas delivery system control plan, completes the active monitoring of the system, meets the needs of the system, and achieves excellent energy saving. result.
Two-hand plan
In the original system, the pressure of the main pipe was controlled by the large circulation system, and the gas was cooled overlappingly. The ability of the cooling system affected the output of the coke oven. Now the main pipe pressure is adjusted by the Fuji inverter to control the fan speed, which not only increases the output, but also saves the power. In terms of the continuity between the machine and the inverter, it is hoped that the 485 interface of the inverter can be used to go through the 485-COM conversion template, so that more parameters of the inverter can be monitored. However, during the debugging process, the status of the inverter in the configuration screen is always different. Usually, the frequency converter also often finds the communication suffix alarm, which is expected to be caused by the hardware driver or the incompatibility of the Kunlun on-state MCGS5.1. Board and IPC continued.
3. Hardware construction
The system uses 1 Advantech IPC, 1 AO template, 1 Fuji inverter, 2 AI templates, 2 pneumatic valves, 3 pressure transmitters, and temperature transmitter geometry. The monitoring software adopts Kunlun on-state MCGS5.1.
The French plan
1. Human-machine interface
The configuration software adopts MCGS5.5 of Kunlun Tongshi Company, and the system has 7 interfaces of "main interface", "alarm", "report", "pressure curve", "automatic control" and "parameter setting". Based on the actual technology, we have organized the graphical interface configuration of the user's operating system by taking the window as a unit, and used the powerful library of the software to create a sophisticated technology simulation window. "Main interface" is used to simulate and display on-site conditions, "Alarm" interface is used to display alarms in the system, "Report" interface is used to save and print reports, and "Pressure Curve" is used to display system timely and historical pressure changes? "Use the columnar guide to express the system's timely pressure changes, master the parameter output calculation value, and "parameter construction" is used to construct and select system parameters.
2. Introduction of MCGS features
MCGS all-Chinese home automation control configuration software (hereinafter referred to as MCGS industrial control configuration software or MCGS) provides a complete set of solutions for users to establish a new process measurement and control system. MCGS industrial control configuration software is a set of 32-bit industrial control configuration software, which can be consolidated and run on Windows95/98/NT control system, integrating animation performance, process control, data collection, device control and output, web page data transmission, dual-machine hot backup , engineering reports, data and curves and many other powerful functions in one, and support a large number of data collection and output equipment at home and abroad, widely used in kerosene, chemical industry, electric power, metallurgy, steel, mining, equipment, machinery, textiles, aerospace, transportation , materials, refrigeration, food, communication, environmental protection, production, water treatment, laboratory and other engineering platforms.
3. PID control and operation strategy plan
Kunlun Tongzhou provides the configuration of PID operation instructions and operation strategies. When using, use the operation strategy to complete and realize the liberation control of the system operation process, so that the system can control the real-time database, control the performance of the user window, close the operation status of the device components according to the set order and conditions, so as to do To get an accurate grasp of the tool's history. Because the on-site process environment is the most complex, we set the pressure to multiple grades by means of strategic operation and PID connection, and each grade uses a different P value, which certainly increases the difficulty of debugging, but through our repeated debugging, the result is It is gratifying that when the coke oven is charged with coal and injected with ammonia, the pressure fluctuation limit of the two gas collecting pipes is greatly reduced, and even if it exceeds the limit, it can return to the normal value in a very short time.
5. Closing remarks
This project focuses on the YONGS industrial computer, through Kunlun on-state and pneumatic valves, frequency converters to continuously complete the constant pressure control of the system, and simulate the status of the system and various related data on the industrial computer in time. According to the results, the monitoring system is simple and convenient, efficient, safe and reliable, and fully meets the various requirements of the test system.
