Numerical Simulation And Analysis To A 300MW Utility Boiler With Oxy-fuel Combustion

In this thesis, the ICEM is used for setting up the three-dimensional structure and generating mesh, and the numerical simulation utilizing CFX-TASCFLOW software is carried out to model the flow field, temperature field, components field and the process of heat transferring when the pulverized coal burns in O2/CO2 environment by selecting the proper flowing, combustion and heat transfer model based on the structure parameters and operation parameters of the 300MW boiler in Shandong Shiheng Power Plant. The characteristics of pulverized coal burned in O2/CO2 environment whilst the changes of wall heat-flux are studied, and the effecting rule of O2 concentration, the change of oxygen/coal ratio and the mode of air distribution to the ignition and combustion of the pulverized coal is analyzed.