This type of counter flow cooler is for biomass energy pellets and animal, livestock, poultry pellets.
It is mainly to cool 2-8mm dimension pellets, when outlet from pellet machines, the hot pellets temperature is about 60-80 centigrade, after cooling, the temperature is not higher than room temperature ±3-5.
The cooling theory is that cold air goes inside of cooler from bottom to top, hot pellets goes to cooler from top to bottom, as time goes on, pellets will pulse at the cooler bottom, cold air will cool them at the bottom gradually, in this way will reduce pellet broken. If cold air also go to cooler from top, which same as pellets, then hot pellets will meet with cold air suddenly, then pellets will be easily broken, especially pellets surface. In this way can cool fully and equally, pellet broken rate is smaller than 0.2%.
It generally works with cyclone and air fan, air lock. Which is used to clean dust, also it can install a screener at the cooler bottom, which can separate dust and good pellets after cooling.
|Cooling time(min)||Less than 10-15Mins|
|Temperature after Cooling(°C)||Not higher than ambient temperature +3~5ºC|
|Power of Airlock (kw)||0.55||0.75||1.1||1.5||1.5|