Central Air Dryer
On the right: Central hybrid air dryer
It is therefore not necessary to have each drum dryer provided with an air dryer!
At the start of the drying, outside air (I) is usually dry enough to absorb a lot of water. This outside air is therefore warmed up to the desired temperature and blown through the seed. Wet air from the seed is evacuated outside (J).
During the drying process, dry air can be added to the process air (H). The seeds can then be dried to a low moisture content. As long as the air from the seed contains more moisture than the outside air, this air is discharged. When this air becomes dryer, it will be recirculated and the final moisture will be absorbed by the dried air.