Simulation Investigation on the Dynamic Characteristics of a 600MW Supercritical Lignite-fired Pulverized Boiler

AbstractThe real-time dynamic simulation model of a 600MW lignite-fired pulverized boiler, which is a supercritical once-through boiler with fan mill three drying media direct fired system, was established. The step reduction of hot flue gas flow rate was simulated. The dynamic responses of live and reheat steam temperatures were obtained and analyzed. Results show that the response of steam temperature is an oscillation process. The superheat and reheat steam overtemperature values are influenced by the boiler load, the hot flue gas extracting percent and the inertia time of pulverizing system