Numerical investigation of the heat transfer and fluid flow in a Carbon Monoxide boiler

► Purpose of this study is to improve operation safety and service life of a CO boiler. ► Heat and flow in oxidizer, DeNOx, flue gas cooler, and DeSOx sections are analyzed. ► Influences of refractory thickening and inserting an ellipsoidal cone are discussed. ► Skin friction coefficient, pressure drop and temperature are compared. ► Refractory thickening is better for reducing friction, pressure drop and temperature.