The application of DCS system in light hydrocarbon recovery unit

Abstract: the application of DCS system in the light hydrocarbon recovery device information produced by excellent flow meter, flow meter manufacturer to offer you the quotation. Abstract: aiming at lijin light hydrocarbon recovery unit system supporting behind cannot meet normal production need to question, use SmartPro distributed control system has carried on the system reform, system adopts modular structure and local network communication technology, from single variable control. More flow meter manufacturers choose model price quote you are welcome to inquire, here is the application of DCS system in the light hydrocarbon recovery device article details. Aiming at lijin light hydrocarbon recovery unit system supporting behind cannot meet normal production need to question, use SmartPro distributed control system has carried on the system reform, system adopts modular structure and local network communication technology, has transformed itself from a single variable control to multivariable optimization of advanced control, executable showed that all the requirements, monitor, print and alarm, realized the distributed control and centralized monitoring and operation, gas production capacity, stability qingting, liquefied petroleum gas products are doubled or so. Gathering maintenance center is mainly responsible for light hydrocarbon in oil production companies of shengli oilfield crude oil stability and light hydrocarbon recovery unit of annual maintenance and renovation project. In recent years, thanks to new technology, new technology, new equipment constantly promotion, application and original equipment stale, aging, low product yield, quality, and maintenance center and many of the business, libraries are engineered. Use of DCS system, maintenance center successively undertook the tuo 2 stand light hydrocarbon recovery unit, GuDong station, pure beam light hydrocarbon oil stability and light hydrocarbon recovery device, lijin crude oil stability and light hydrocarbon recovery unit reconstruction project. Now in lijin light hydrocarbon recovery unit reform to introduce the application of DCS system in the light hydrocarbon recovery device. 1 overview lijin light hydrocarbon recovery unit was established in October 1988, completed and put into production in June 1991, the original size of 10 & times; 1 o000m3 / d。 After ten years of production operation, gradually exposed many problems, mainly displays in the part of the equipment aging, severe corrosion, process and supporting system, especially the control system can't meet the needs of the device's normal production. On the other hand, as the natural gas production fell, feed gas composition, such as a big change, the safety in production can't guarantee anything, poor economic benefit, therefore, plant production, the scale of 5 & times; 10000m3／d。 Transformation is conducive to the production safety, environmental protection, and good economic benefit can be obtained. This modification into technology, equipment, automatic control, electrical parts, such as the DCS system adopts smartPro distributed control system of automatic control and complete the data collection and monitoring [ 1 - 3] 。 2 after transforming the system structure and function of a successful zui automation system mainly is the precondition of reasonable design scheme, at present, various automatic control system, main types of PLC, SCADA and DCS, they have their own characteristics. PLC（ Programmable logic controller) Has the characteristics of the logic function is strong, particularly suited to the need for logic control, sequence control and so on, mainly dealing with discrete quantity, when the control loop, use is not convenient. SCADA（ Data acquisition system) , it is mainly used for remote data acquisition, network for wide area network, the system real-time performance is not high, can not be used in quick response required. The DCS, Distributed control system) , main characteristic is loop processing ability, the main processing simulation, system network for local area control network, good real-time, friendly man-machine interface, has a wealth of fault diagnosis and alarm function, easy to master operating personnel & other 。 Therefore, the application of a SmartPro system Yu Lijin light hydrocarbon recovery unit redevelopment in automatic control system, it is very appropriate. 2. 1 system structure lijin crude oil stability and light hydrocarbon recovery unit reconstruction project including electric dehydration device, crude oil stabilizer, light hydrocarbon recovery unit, tank, pump parts, such as, among them, the electric dehydration devices use a set of Dcs system and crude oil stabilizer; Light hydrocarbon recovery unit, tank, pump parts, such as sharing a set of DCS system. Two sets of DCS control system installed in the crude oil stability control room and control indoor light ends. Installed in the two control indoor relatively independent of DCs control system, and can achieve mutual communication function. Of two sets of DCs system, the system USES the Beijing hollysys system engineering stake SmartPr0 distributed control system, computer technology, control technology, communication technology and graphical display ( CRT） The combination of the technology, is to complete the process control and process management of modern equipment, is equipped with 16 of control circuit, detection circuit, 31, see table 1. TI: the temperature of the input signal K: thermocouple Pt: heat resistance AI: AO: analog signal input analog signal output DI: switch input and DO: switch output the whole system includes 1 I / 0 control station, two operator stations ( Among them 1 as the engineer station) And a report printer. I/O control station by the main control unit, intelligent I/O unit, power unit and cabinet of four parts, to complete the signal collection, engineering unit conversion, through the network system to transfer data and diagnostic results to operator station, and other functions. Operator station is an important human-computer interaction interface, zui by high-grade industrial computer, special industrial keyboard and so on, the monitoring and management of production site.

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