Taking a 300 MW unit oxy-coal fired boiler unit as the research object

the modular modeling method was employed to establish the simulation model for the quad-section rotary gas-gas preheater in this unit.Moreover

the operating characteristics of the quad-section rotary gas-gas preheater were analyzed by the static simulation calculation/test and the dynamic disturbance simulation tests to verify the static precision and dynamic response performance of the model.The results present that the model has stable operation and fine static precision with the static simulation calculation and test.The results of velocity test are consistent with the actual gas heat transfer and flow process mechanism analysis

which shows that model can reasonably present the heat transfer and flow process characteristics of the quad-section rotary gas-gas preheater.The dynamic disturbance simulation tests of coal feeder speed and burners swing level indicate that the model has fine dynamic response characteristics

which can meet the requirement of realtime simulation.However

the model can be used not only for simulation training

but also for the reference of the quad-section rotary gas-gas preheater design and operation optimization.