An intensive deposition of powder on the walls in the counter-current spray towers develops the risk of deposits burning in the vicinity of hot air inlets. Cooling of the hot air inlets area could reduce wall temperature to avoid deposit burning. CFD calculations were performed to estimate the effect and to optimize the position of cold air inlets on cooling efficiency of the hot air inflow areas in industrial spray tower. To keep the same evaporation capacity of the tower when cold air was introduced, the heat balance of the dryer was recalculated. Experimental analysis of the wall temperature distribution near air inlets enabled validation of the CFD model. Analysis of the results shows a difference in circumferential cool air distribution in all analyzed configurations due to the upward and downward flows of drying gas near the inlet ring. The wall can be cooled also by the downward flow of a drying agent temporarily induced by the instable flow pattern in the whole tower. The simulation methodology developed in this work allows to select the optimal cooling air inlets construction and location.