Cooler is mainly to cool 2-8mm diameter pellets, when outlet from pellet machines,the temperature is about 60-80 centigrade, after cooler, the temperature is not higher than room temperature +3 to 5 ℃
Cooler adopts counter flow theory, cold air goes to cooler from bottom to top, hot pellets goes to cooler from top to bottom, as time goes on, pellets will pile up at the cooler bottom,cold air will cool pellets at the bottom gradually, in this way will reduce pellet broken situation , if cold air also go to cooler from top, which same as pellets flowing direction, then hot pellets will meet with cold air suddenly , pellets will be easily broken, especially pellets surface. In this way can cool fully and equally, pellet broken rate is smaller than 0.2%.