| Distribution control system has developed for ten years, and applied every trade and industry. But chemical industry is special, it is important to choose and apply distribution control system. This article analyzed and researched application of distribution control system in the JiLin chemical fiber acrylic fiber process. I hope that acrylic fiber company can produce in the safety mode and apply flexible this distribution control system, and realize enterprise development very much.At present because all enterprises develop no balance, they all try their best to arise their lever developing. All enterprises capacity of produce and market situation as follows: Xuhua of Japan is 60kt/y, Taiwan of China is 100kt/y, Taiguang of Korea is 75kt/h. Acrylic fiber of import price reduce from 1700dollars per ton to 1850dollar per ton in 1996 to 1320dollar per ton at present. We can look at there is a big diffrence in the cost and capacity of produce, the main reasons is technoleg,equipments; of course including lever of management and so on, make them have a big difference. Acrylic fiber price have no advantagment about price. How to arise capacity of produce and arise quality of produce, and improve benefit of enterprise, then enterprise need choose suitable control system and management system. But the system should have management function except there is control function. Of course control system should have well quality of hardware and well software, for example AMS and PRM. At the same time, market situation of layout is the reason of control system investment. But the price of system is the best important reason to choose. With the extended of application area, price should be high, but in some area of petroleum chemical control system price is reducing. In the past time, government trade have a good lever of rising, but for petroleum,chemical and so on, they only keep up stable. But market of electric area had become smaller than past, distribution control system has started coming dowm.In 1998, CENTUM CS had been applied in JiLin chemical fiber group com. Limt, field control system link between CENTUM CS and CENTUM XL. At that time, there are two systems which they can choose, Honeywell TPS system and Yokogawa CENTUM CS, after considering, at last they choose the CENTUM CS system. Because at that time they considered system should stable running and need not open net. CENTUM CS is a stable system very much, it has a special net, and it is difficult to be disturbed, and at same time operation station adopted to UNIX system, it is stable too. CPU is redundancy CPU that can guarantee that it can not affect on plant running when the power shut down. But this time, Jilin choosed TPS system after considering safety and stable running and net opening.With the development of distribution control system, at the same time with requirement of whole earth economic, all enterprises choose distribution control system not only considering control function but alse considering management. Now distribution control system use embed language, for example ORANCLE,SYBASE,SQL and so on to realize fountion. Process data and relative to data of some equipments were collected through OPC server, and change over data through server and distribution contol system. At present, distribution control system bus technic is HART and field bus. Data of field equipments were collected by card or termination trip to instrument management server and manage those instrument through server. But if we want to manage all instrument in the field, it is not enough only depending on OPC, should be have monitor software, Jilin chemical fiber used IFIX software in the past time. But now it is not necessary. For distribution control system, the vendor must know market of domestic and aboard country, in order to adjust automatic technic to adapted to enterprise required development. For instance, Honeywell and Yokogawa system mainly adopts to petroleum and chemical trade, ratio of market is higher than others manufacturer, because they know the trade, there is control system to suit for applying in the area.In a word, distribution control system can get effective use, that will improve acrylic fiber trade developing, of course, this is question and waiting for emergency to be solved by acrylic fiber trade and automatic trade.There are fourth chapter in the article.In the first chapter, with the development situation, as well at present application of distribution control system, I put forward to article signification of research.In the second chapter, I have introduced relative contents according to distribution control system. If enterprise wants to choose suitable distribution control system, at the first, they need have knowledge for distributing control system. They should know development history and market. Then I clarified framework of distribution control system. At last I clarified use rules and condition of distribution control system.In the third chapter, I analyzed and researched in detail application of Jilin chemical fiber process. Its process is continues process, there is a large scope, distribution control system had applied very well in the control processing. It is only controller in 1998, only use to control and monitor equipments on site. But this system did not consider too much information of network management. In this chapter, through investigating, I have known very well the control mode of JiLin chemical acrylic fiber process, and at same times through analyzing I have known all the control function fiber process of distribution control system. Of course I have known at that time this system can realize some simple function of management, for example print, and recorder and so on, to realize relative data transfer to management system in order to develop production.In the fourth chapter, according to contents of the third chapter, I put forward to some suggestions about how to choose distribution control system in the future, at the same time, I give some development direction of distribution control system depend on required for economic developing environment and enterprise of acrylic fiber developing. At last, I bring forward my opinion about how to choose satisfied distribution control system for new preparing to construct acrylic fiber plant. |
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