PROCEDURE AND INSTALLATION FOR THE CONTINUOUS DRYING OF WOOD CHIPS, WOOD FIBERS OR OTHER BULK PRODUCTS.

摘要

THE PROCEDURE PROVIDES TO USE THE HEAT OF SMOKE GASES PRODUCED IN A COMBUSTION CHAMBER, IN A DRYER FILLED WITH MATERIALS TO BE DRIED. FOR THIS, IT IS EXPECTED THAT THE FUMES, FREE OF SMOKE GASES, WHICH ARISE FROM THE DRYER, WILL BE CONNECTED THROUGH A CIRCUIT TO THE SAME. THESE FLOWS ARE HEATED TO THE NECESSARY TEMPERATURE FOR DRYING THE MATERIAL, INDIRECTLY IN FRONT OF THE DRYER, THROUGH THE SMOKE GASES THAT COME OUT OF THE COMBUSTION CHAMBER. IN THIS PROCESS, A PART OF THE FLOW OF THE FLOWS IS DEFLECTED FROM THIS CIRCUIT AND CONDUCTED TO THE COMBUSTION CHAMBER. THE INSTALLATION TO EXECUTE THIS PROCEDURE PROVIDES THAT FROM THE CYCLONE OR CYCLONES (12) THAT ARE USED IN THIS PROCEDURE TO SEPARATE THE MATERIAL TO BE DRIED, A TUBE (13) FOR THE FLOWS IS CONNECTED TO THE DRYER (8), AND A SWITCH IS DISPOSED HEAT (7) IN THE TUBE (13) FOR INDIRECT HEATING OF THE FUMES BY THE SMOKE GASES THAT COME OUT OF THE COMBUSTION CHAMBER (1). A DIVERTER DUCT (6) IS ALSO DISPOSED TO THE COMBUSTION CHAMBER (1) IN FRONT OF THE HEAT SWITCH (7) AND IN THE DIRECTION OF CIRCULATION. THIS INVENTION ALLOWS TO MAINTAIN, WITH A MINIMUM EFFORT, LIMIT VALUES OF EMISSION OF HARMFUL SUBSTANCES LESS THAN THOSE PRESCRIBED UNTIL NOW. AT THE SAME TIME EFFECTIVENESS INCREASES AND EXPLOSION HAZARD DECREASES.