DCS Design And Study In FCC Light Gasoline Etherification

FCC light gasoline etherification technology can improve gasoline quality effectively which process is environmental protection and has higher economy. Distributed Control System (DCS) is a control system monitoring operation and management to a production process by using computer technologies and a main automated system applied to a modern factory. A design optimization and scheme investigation are done to DCS selection, control and system integration in FCC light gasoline etherification unit in the thesis. Equipment selection, section divided and production capacity are introduced according to process characters of FCC light gasoline etherification unit and the process control characteristics of the device are analyzed. Emerson’s PROVOX system is used to configurate, build a control network and complete an upper system framework according to design requirements and codes provided by a design institute and users. In addition, configuration softwares are used set up in the system to the complex control loops successfully and split control, sequence control, interconnected control and etc. are completed using FST software programs. Take a FCC light gasoline etherification device as an example and analyzation and summary are performed to the relevant factors to improve system security and reliability in the process of DCS integration and suggestions are proposed improving system environment adaptability to a DCS construction are suitable for the other automated system application and construction. As integration is one of development tendencies of a plant automated system, a development thought is proposed that a future automated system should be integrated factory equipment, process control and management system and a personnel opinion about a system network structure and composition factors is put forward according to a survey of today’s China chemical plant automation systems. An advanced control theory application design is carried out to a relevant control loop using MATLAB software and control curves are obtained adopting adaptive theory and fuzzy control theory and the optimized relevant parameters can be refered in the futural system upgrades comparing with traditional PID control results. In addition, the technical anatyzation for upgrading of DeltaV is provided to reduce economic cost of device dlitation. The thesis has some reference value and engineering significance for DCS application in a chemical plant design.