The cooling station is constituted by a buffer hopper disposed near the dosing station. This hopper may be fed by mechanical or pneumatic conveying.
The powder is cooled by heat exchange with conditioned and processed air. The closed air circuit consists of a circulation fan motor, an air / water exchanger (air cooler), the bottom of a fluidised base of the hopper and a bag filter at the top.
The control of the powder temperature to a set point is set by a control algorithm taking into account the input temperature of the powder, the flow and temperature of glycol water in the air cooler and the target temperature.