Design And Realization Of Aluminium Triethyl Produce Qeuipment Control System Based On Can Bus

The aluminium triethyl is one kind of transparent liquid with vivacity chemical property, it's widely been accepted after Zeigler and Tane took it as the polymerization catalyst and the organic synthesis in 1948. The output of American alkyl aluminum has amounted to 25,000 tons each year in 1968. UK, Germany, Soviet, Japan and other country have the production also. Our country also have been reserched the alkyl aluminum and the produced it in recent years, but the output was not big, produced and used by itself generally, especially the aluminium triethyl produced with indirect method, produced by a chlorine two aluminium triethide dehydrogenation, cannot satisfy the need of petroleum chemical industry of our country. This system implements two step direct synthesis to produce aluminium triethyl, this method is easy, the purity is high and with low cost. It will have the broad market prospect in our country. But, as a result of technique of production's unceasing improvement, the automatic control system is nto so ideal. Therefore, designing a kind of effective control system is very vital to the large amount produciotn of aluminium triethyl.This article comprehensively compares the current petroleum, the chemical industry which widely using the DCS, and proposes the controlling plan of FCS based in aluminium triethyl control system.This system choses SHCAN2000 field bus control system which is based on CAN bus, aims to one of the chemical plant in Liaoning province, this article proposed a set of complete system realization plan:On the monitoring station is composed of five IPC, a printer and the CAN network card.Five IPC can work as the operation station or monitoring station,they work independently. FIX MDCAS is uesed as the MMI and the data operation manager which can realize the real time historical curve, report form printing and so on. The slave computer uses the multi-block SHCAN intelligence messure and control module to realize controlling, including the system of monitor, the alarm and interlock system, accessory device and alarm system, the design of intrustment earthing in center control room.This topic designing of aluminium triethyl product process field bus control system, already obtained the successful application in one chemical plant in Liaoning province in October,2010. The system function is formidable, the control effect is good, Simultaneously confirmed the design of the control system is rational, practical and feasible, It's a beneficial attempt for the further promotion of the SHCAN2000 field bus control system in the industrial control domain.