| Gas boiler combustion is a kind of high efficiency and clean thermal energy equipment. It is widely used in various fields. Gas boiler has been widely used in many countries around the world, its advantages include easy to adjust the load, can be well adapted to a variety of fuels, and the use of high efficiency of the fuel itself is very high. Gas fired boiler is a control object with multi variable nonlinear time varying strong coupling and large time lag, so it is not easy to construct a precise mathematical model to describe the control process of gas boiler. The division of the obtained a plurality of independent control subsystem, facilitate the analysis of the working mechanism of the gas boiler, while the introduction of now has strong reliability, economy and stability of the distributed control system-- Nanjing sciyon DCS system, to achieve the desired control function. DCS control technology is the key to the control of gas boiler. It is the main control platform to ensure the stable operation of equipment and reduce the safety and production accident.The hardware and software of the Nanjing sciyon DCS system composition, control algorithm programming, man-machine interface and other aspects are introduced. The in the process of gas boiler is introduced based, focusing on of gas boiler control main circuit analysis, the Nanjing sciyon DCS control system used in gas drum water level of boiler and furnace pressure and superheated steam temperature control important control circuit are introduced in detail. Project in the distributed control system to solve the problem of domestic energy saving and emission reduction, improve the automation level of today’s gas boiler, and improve the energy efficiency of the study has a certain reference. |
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