The Design Of Salt Water Recycling Improvement Project Control System

The world science and technology goes ahead at very fast speed, the adjustment of industrial structure expidite. The appearance of numerous new technology aimed at high effect, energy saving and environmental protection promotes the development tendency charactered with structure changes in the industry. With the development of the industrial structure, the corresponding safe, reliable, easy to develop and easy to maintain control system imminent need. Emerson DeltaV DCS fully using the latest computer, digital communicatio, network, graphics control, and the integration of fieldbus, OPC, industrial Ethernet and other advanced technology, convenient operation view and a simple intuitive configuration available for user. And able to provides complex control for siteThis topic mainly aims at the control system of desigen and application. Taking the Salt water Recycling Improvement project as a starting point. Simply discussed the development status, trends and prospects of Salt water Recycling, DSC system structure, control network, function and so on. Also introduced process and situation the project. Then introduced the preliminary program and control system of the Salt water Recycling Improvement project. Through a few typical control loop of each process to explain the relization of control system.In the aspect of the project carrying out, Focus on the introduction of PID control, cascade control, split-range control, equipment start control, sequence control, and emergency control in the process. On the basis of DeltaV DCS distributed control system, combined with the configuration software, Fieldbus, OPC, Industrial Ethernet, PROFIBUS and other advanced industrial control technology, the final completion of the software development and configuration in the project were final completion. Then through the static and dynamic site test enabling the automatic adjustment in saline-treated and detection process. System and process parameters can be adjusted to achieve automatic control, critical process parameters interlock protection, all process parameters alarm, sequence control procedure have a status display. To achieve the above scheme, the final saline treatment and testing in a controlled state, the effective protection of the brine accurate detection, to smooth the entire system played a necessary role in achieving the DCS control process advancement, openness and reliability requirements.