Process and apparatus for drying bulk material, preferably plastics granules (pellets)

摘要

The invention is to provide a process and a suitable apparatus with which the exhaust-air temperature is lowered and the overall energy efficiency is improved without increasing the duration of drying and without impairing the quality of the plastics granules (pellets). For this purpose, the drying air flowing out from the dryer (28) is heated by two heating devices (8, 9, 15), which are installed in the drying air stream. The first electric heating device (15) is installed such that the drying air flowing into the plastics granules (pellets) (16) is heated directly before exiting from the drying air duct (6). <IMAGE>