Chamber dryer with uniform treatment parameters

• US 20090300935A1
• Filed: 04/25/2006
• Published: 12/10/2009
• Est. Priority Date: 04/29/2005
• Status: Abandoned Application

• Current Assignee: Globus Srl
• Original Assignee: Globus Srl
• Inventors: Paron, Fabio
• Application Number:
  US11/919,312
• Publication Number:
  US 20090300935A1
• Time in Patent Office: Days
• US Class Current: 34/236
• CPC Class Codes: F26B 17/28 with movement performed by rollers or discs with material passing over or between them, e.g. suction drum, sieve , the axis of rotation being in fixed position moving rotating rollers F26B15/122
• CPC Class Codes: F26B 3/08 so as to loosen them, e.g. to form a fluidised bed "fluidised-bed" technique in general B01J8/24; centrifugal fluidised beds F26B7/007

Abstract

A chamber dryer with uniform treatment parameters comprises a drying chamber (20), a feeding (21) of a mass of damp material to be treated (11), an inlet (25) for a mixture of hot gases, an outlet (26) for a portion of heavy dried material (12) and an outlet (27) for conveyor air, wherein the drying chamber (20) is a fixed chamber comprising at least one conveyor bed (23) of the damp material to be treated consisting of a series of adjacent rotating elements (24) having an adjustable interaxis, in which two adjacent rotating elements define a gaugable passage opening (40).

Claims

1. A chamber dryer with uniform treatment parameters comprising a drying chamber (20), a feeding (21) of a mass of damp material to be treated (11), an inlet (25) for a mixture of hot gases, an outlet (26) for a portion of heavy dried material (12) and an outlet (27) for conveyor air, characterized in that the drying chamber (20) is a fixed chamber comprising at least one conveyor bed (23) of said damp material to be treated consisting of a series of adjacent rotating elements (24) having an adjustable interaxis, in which two adjacent rotating elements define a gaugable passage opening (40).

2. The dryer according to claim 1, characterized in that said drying chamber (20) comprises a further impact and distribution bed (22) of said damp material to be treated (11), said bed (22) comprising adjacent rotating elements (24) and being situated above said conveyor bed (23) in correspondence with said feeding (21).

3. The dryer according to claim 1, characterized in that said conveyor bed (23) longitudinally crosses said drying chamber (20) from said feeding (21) to a decanting chamber (38) close to said outlet (26) of the heavy dried material (12).

4. The dryer according to claim 1, characterized in that said conveyor bed (23) can have a horizontal or tilting position.

5. The dryer according to claim 1, characterized in that said feeding (21) of said mass of damp material to be treated (11) comprises a stellar sealing valve (35) and a distribution Archimedean screw with and adjustable bottom (37).

6. The dryer according to claim 3, characterized in that it comprises a bed for the separation (39) of a gross portion (14) of material situated downstream of said conveyor bed (23) above a first section of said decanting chamber (38), a second section of said decanting chamber (38) collecting said gross portion (14) of treated material having dimensions greater than passage openings (40) between rotating elements (24) of said separation bed (39).

7. The dryer according to claim 6, characterized in that said first section of said decanting chamber (38) is equipped on the bottom with an extraction Archimedean screw (49) of heavy dried material (12).

8. The dryer according to claim 6, characterized in that said second section of said decanting chamber (38) comprises an extraction Archimedean screw (52) of the discarded gross portion (14).

9. The dryer according to claim 6, characterized in that it comprises an adjustable motorized shutter (51) for calibrating the air rate in the decanting chamber (38).

10. The dryer according to claim 1, characterized in that said drying chamber (20) comprises a reversible extraction Archimedean screw (54) in a position underlying said conveyor bed (23) for collecting fine particles through said passage openings (40) between said rotating elements (24).

11. The dryer according to claim 1, characterized in that said rotating elements (24) have a cam profile, said passage opening (40) between two adjacent rotating elements (24) having a converging-diverging form with a geometry which is cyclically variable on a plane with a transversal section.

12. The dryer according to claim 2, characterized in that said inlet (25) for a mixture of hot gases comprises a first channeling (25a) for the entry of gas between said distribution bed (22) and said conveyor bed (23).

13. The dryer according to claim 1, characterized in that said inlet (25) for a mixture of hot gases comprises a branched channeling (25b) for the entry of gas below said conveyor bed (23).

14. The dryer according to claim 13, characterized in that said branched channeling (25b) comprises a first central inlet duct (41) at the end of said drying chamber (20) and side ducts (42) situated on opposite sides of said drying chamber (20) equipped with a series of mouths (43) having a progressively decreasing section on the sides of the drying chamber (20), suitable for maintaining a constant drying air rate and pressure along the whole drying chamber (20) below said conveyor bed (23).

15. The dryer according to claim 1, characterized in that, upstream of said drying chamber (20), it comprises a combustion chamber (28) for the production of hot gases and a mixing chamber (29) for their mixing with the recovered gases separated in a set of cyclones (31) positioned downstream of said drying chamber (20), said recovered gases being moved by a fan (34) in a recovery pipe (30).

16. The dryer according to claim 15, characterized in that said recovery pipe (30) is equipped with regulation shutters (32) and an emergency stack (33).

17. The dryer according to claim 1, characterized in that said set of cyclones (31) comprises an extraction Archimedean screw (44) of a part of the powders and stellar valves for their discharge