| PPCP(Pulse Corona Induced Plasma Chemical Process) is a great method to DeSO 2 from flue gas, it is generally acknowledged a new craft of DeSO 2 from flue gas with strong market potential and prospect of using in the world. With test scale enlargement and gradually ripe to being practical technology, the study on automatic control system in the process of PPCP, which is an indispensable part in the whole DeSO2 technology, is urgent. In my thesis, the monitoring system of PPCP based on PLC can ensure the control system work correctly, thus can meet the need to research the craft deeply. It is in an industrial experiment stage at present, this subject offered valuable design mode and experience example for large scale industrial application set.PPCP has a special craft process, it relates to chemical, high voltage technology, plasma project, computer science, EMC(Electromagnetic Compatibility) and other subjects, it is completed with a project team, my responsible is to control the PPCP system with PLC, the monitoring system in upper machine and resolve EMC problem in the final debugging process. This thesis includes the following several important respects:(1)Design the PPCP system with the upper and the lower machine, the upper machine adopts PLC to implement the system controls automatically and manually, and has offered some ladder-shaped pictures too. To communicate through freedom communication with the lower machine, thus can ensure the control system run without errors.(2)The temperature of this system has much effect on the PPCP process, adopt the fuzzy technological control route on it, and have designed the fuzzy controller. Practice has proved that this scheme is suitable for the control task of this course.(3)The monitoring procedure of the upper machine use the face target programming technology, it has been finished with Visual C++, utilize the multithreading skill and communication control MScomm, according to the special-purpose communication protocol of SIEMENS PLC, complete the monitoring of this system preferably.(4)Carry on the union debugging in the scene of the system, because of the particularity of this system, an electromagnetic compatible problem is very serious, this problem has been solved in scene successfully, and made effective precautionary measures in hardware and software respects.Scene debug operation result make it known that the automatic control system runs steadily, the monitoring system is convenient, flexible. It also have settled good foundation for further investigation to the craft course. |
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