Numerical Simulation and Experimental Study on A Novel Kiln Burner

A novel kiln burner was designed based on two phase stochastic separation model and flow structure theory.Numerical simulation was developed on flow fluid characteristics of combustion through gas phase using Eulerian method and coal particle phase adopting Lagrangian method,it puts high emphasis to investigate the influence of combustor structure,particles diameter,air matching ratio on temperature,velocity,oxycarbide and combustion efficiency.The results show that temperature rises with particle diameter increasing,however,the minor particle diameter can also contribute to high temperature due to smaller apparent area.Turbulent motion and mixing degree between the gas-particle phase is enhanced owing to secondary swirl air injection,and it can protect high temperature corrosion and alleviate the degree of inwall slagging by adopting direct-flow tertiary air.Moreover,to verify the effectiveness of the proposed novel kiln burner,hot-condition experimental study was performed,it shows a good agreement between simulation and experimental results.