Establishment And Application Of The Distributed Control System About 30000nm~3/h Oxygen Manufacture Machine In Shougang Oxygen Plant

The Distributed Control System which is based on the PC (Personal Computer) is an important development direction in the control field at present. Being constitute of the processing control level, the control management level and the production management level, taking the communication network as the link, centralizing displayed operation management, controlling disperser relatively,owning the nimble disposition, the configuration convenience multistage computer network system structure, The Distributed Control System can definitely adapt the long production process, the multiplied examination control loops, the complex production control plan, the high security reliability request. It is playing the vital role in modern industry production in aspects as improving automation control level and management level, realizing the most superior technology economic indicator, enhancing economic efficiency and social efficiency and so on. It is significant to utilize the stably, precise, reliable automation control system in studying the oxygen manufacture production process.Based on researching structure of the Distributed Control Systems and the background of oxygen manufacture unit control section transformation of Beijing Shougang Corporation oxygen plant 30000Nm3/h(thirty thousand),this article introduced briefly the function, the technological process and the automated system composition of thirty thousand oxygen manufacture, analyzed the question and the flaw which the present equipment exists, analyzed the original system control structure, elaborated the practical significance and the modification requirement which the equipment transforms, proposed the new system solution, selected and used the hardware of CENTUM and the forth generation system of the Distributed Control Systems of CS 3000 configuration software. Through understanding the request of producing oxygen manufacture and according to the design thought of the Distributed Control Systems, we proposed the design principle of the The Distributed Control System for producing oxygen engineering and designed the control system that suitable for the request of oxygen manufacture production craft and we also completed the installation of hardware and the connection of sensors and measuring appliances installed in scene. In order to avoiding or reducing the influence of the interference, we adopted a great deal of measure of anti-jamming in the hardware and made the system acquire good effect in anti-jamming. CS3000 configuration software can flexibly and conveniently configure to complete the functions of the supervision to the processing of production, failure detection and statistical report form, which brought a great convenient to the production and management. Using fundamental PID and cascade control and so on to the kinds of control variables in the process of production to achieve the steady and reliable control, we reached the request of the craft and guaranteed the quality of production.This system has operated normally for nearly twenty months since it is implemented the transformation in April,2006.The system operating has been stable, reliable, and it can be completely suitable for the control request of the oxygen manufacture production craft, it has confirmed the design proposal efficiency. It is possible to provide the reference to the same profession brothers and enterprises for what we have done.