On the heat recovery of the spray dryers by using the tube-finned heat exchanger with elliptical holes

Abstract

In this paper, the applicability of the heat exchangers for the heat recovery and energy saving purposes in spray dryers by utilizing Computational Fluid Dynamics (CFD) is investigated. For this purpose, two different tube-finned heat exchangers with the elliptical holes are added to the equipment. The first one gives the heat of the exhaust air and the second one translates the recovered heat from the exhaust air to the atomizing air. Initially, the effect of different parameters on the heat exchangers are studied. Then, numerically the effect of adding heat exchanger on the factory performance is evaluated. It is observed that by adding the mentioned heat exchangers, the energy consumption and energy price of the factory and the spray dryer decreases. Hence, the suggested equipment can be used for energy saving in the spray dryers.