Numerical simulation research and application of regulating over-fire air for tangential boiler

The horizontal flue of a 660MW ultra-supercritical once-through boiler in China has a ash accumulation deviation, which is analyzed as the residual rotation of the burn-out air cut garden. In this paper, combined with numerical calculation and simulation, the influence of the residual rotation of the horizontal flue is analyzed, and the problem of ash accumulation in the horizontal flue is solved by adjusting the over-fire air. The simulation calculation of the burn-out wind momentum can effectively guide the adjustment of the burn-out wind and eliminate various problems caused by residual rotation.