ABSTRACT
The grain moisture content can achieve 25%, corn moisture content 30-36% during harvest. It is obvious that moistures are not homogeneous among the grains. With an average moisture content of the grains 22%, there are approximately 10% of grains with the moisture content below 17% and more than 20% of the grains with the moisture content about >25%. During the wet season, the moisture content can reach 20-22%, extremely 29%. For storage of leguminous plants, limit of the moisture content is about 17%, and for cereals it is about 15%. The moisture content of long-term stored seeds (more than one year) should reach 11-12%, and the moisture content of long-term stored grains is 13-14%. During short storage, the grains need to reach the moisture content of 15,5-18%. If the moisture content of long-term stored grains is high, the drying has to be implemented in post-harvest processing. The drying device has to be chosen with respect to the required performance, regime of use, positional conditions and preferred drying medium. For the heating the oil fuel, natural gas, methane or propane/butane are being used. The dryers considering operational condition dependency can be divided as follows:
• Continual (working on one pass), • Batch.
