Method and system for recycling ripped asphalt into new asphalt production

• US 8,882,335 B2
• Filed: 01/21/2008
• Issued: 11/11/2014
• Est. Priority Date: 09/27/2007
• Status: Expired due to Fees

• Current Assignee: E-Mak Makine Insaat Ticaret VE Sanayi Limited Sirketi
• Original Assignee: E-Mak Makine Insaat Ticaret VE Sanayi Limited Sirketi
• Inventors: Gencer, Mehmet Nezir
• Primary Examiner(s): COOLEY, CHARLES E
• Application Number:
  US12/680,020
• Publication Number:
  US 20100203462A1
• Time in Patent Office: 2,486 Days
• Field of Search: 366/7, 366/18, 366 22- 25, 366/141, 366/148, 432/140, 432/121, 432/130, 432/186
• US Class Current: 366/18
• CPC Class Codes: E01C 19/1004 Reconditioning or reprocessing bituminous mixtures, e.g. salvaged paving, fresh patching mixtures grown unserviceable; Recycling salvaged bituminous mixtures; Apparatus for the in-plant recycling thereof E01C19/1036 takes precedence

Abstract

The invention relates to a hot asphalt recycling system for adding any used and then ripped asphalt from its original place into new asphalt production, having a heat-insulated frame with a closed volume; at least one RAP material transmission channel within frame, transmission channel being embodied so as to produce a geometrical shape with at least three edges; a transmission line displacing within the RAP material transmission channel and comprising a plurality of transmission plates positioned thereon at certain intervals; optionally a feeding mechanism feeding RAP material to transmission line at a certain speed; an accumulation reservoir formed within frame to store the RAP material heated to a certain temperature without causing any temperature fall; optionally a discharge mechanism providing the transfer of accumulated hot RAP material; and optionally a discharge unit to discharge the RAP material within the transmission line to the exterior when it becomes necessary.

Claims

1. A hot asphalt recycling system for adding any used and then ripped asphalt from its original place into new asphalt production, having a heat-insulated frame with a closed volume;

at least one RAP material transmission channel within said frame, said channel being embodied so as to produce a geometrical shape with at least three edges;

a transmission line displacing within said RAP material transmission channel and comprising a plurality of transmission plates positioned thereon at certain intervals and whereon RAP material is conveyed;

optionally a feeding mechanism feeding RAP material to the transmission line;

heating means used to heat the RAP material in the transmission line up to a certain temperature;

optionally a RAP material discharge mechanism providing the transfer of accumulated hot RAP material to a desired means;

wherein said heating means comprise a hot air circulation channel surrounding the transmission channel from the interior and/or exterior, and a hot air generation mechanism used for providing hot air to be circulated at a desired flow rate and speed within said hot air circulation channel, the transmission channel and accordingly the hot air circulation channel have a right-angled triangle-like form and said system comprising an actuation mechanism to displace the transmission line at a certain speed;

an accumulation reservoir formed within the frame to store the RAP material heated to a certain temperature without causing any temperature fall; and

optionally a discharge unit to discharge the RAP material within the transmission channel to the exterior when it becomes necessary.

2. An asphalt recycling system according to claim 1, wherein said hot air generation mechanism further comprises a pre-combustion chamber, fan, and a boiler.

3. An asphalt recycling system according to claim 1, wherein said hot air generation mechanism comprises cold air supplying means in order to control the temperature of generated hot air.

4. An asphalt recycling system according to claim 3, wherein said cold air supplying means is a flap, which is placed at the inlet of the hot air channel, is opened and closed so as to increase/decrease the cross-section of said cold air inlet channel, and is composed of a plurality small flaps.

5. An asphalt recycling system according to claim 4, wherein said small flaps are in the form of wings disposed in sequence along the inner wall of said cold air inlet channel so as to narrow and enlarge the channel by rotating around multiple connection axes.

6. An asphalt recycling system according to claim 4, wherein the opening/closing of said small flaps is controlled by means of an automation system.

7. An asphalt recycling system according to claim 1, further comprising a hot air reservoir formed at the zone of the hypotenuse border of the transmission channel comprises, so that the hot air having completed the circulation within the hot air channel is supplied into said reservoir.

8. An asphalt recycling system according to claim 7, wherein said hot air reservoir comprises a plurality of small guiding wings that lengthen the way to be traveled by hot air within the hot air reservoir so that heat transfer is provided to the transmission channel and the RAP material accumulation reservoir and that divert the hot air becoming polluted with the emerging steam and gases to the air outlet pipe.

9. An asphalt recycling system according to claim 8, wherein an aspiration system and filter are provided at the end of the channel in order to safely release to the atmosphere the hot air which becomes polluted due to steam and gases emerging as a result of heat within said hot air reservoir, and then is canalized to the air outlet pipe by means of guiding wings.

10. An asphalt recycling system according to claim 1, wherein a whorl cylinder is employed in the role of said feeding mechanism.

11. An asphalt recycling system according to claim 1, wherein said actuation mechanism comprises at least one electric motor and reducer and a plurality of chain gears coupled to said motor and reducer and a plurality of chains which are rotated by means of these chain gears and positioned so as to rotate in turn within the transmission line.

12. An asphalt recycling system according to claim 1, wherein a whorl cylinder is employed in the role of said discharge mechanism and optionally, a discharge shutter is used which is embodied at the base of said accumulation reservoir.

13. An asphalt recycling system according to claim 1 wherein said RAP material discharge mechanism comprises weighing means equipped with weight sensors in order to ensure the addition of processed RAP material within the system into the new mix at a desired proportion.

14. An asphalt recycling system according to claim 13, wherein said weighing means comprises at least one discharge outlet wherein hot RAP material output from the material accumulation reservoir is discharged, weight sensors measuring the weight of the material filled into said discharge outlet, closing means closing the discharge shutter once the material is discharged and weighed to a desired weight, and a whorl cylinder to transfer the material released from the discharge shutter to the mixer.

15. An asphalt recycling system according to claim 14, wherein said material accumulation reservoir is embodied so as to make an outward projection from one side of said frame so that the reservoir'"'"'s discharge outlet becomes aligned with said discharge reservoir.

16. An asphalt recycling system according to claim 15, wherein a hot air channel is provided which is embodied in an insulated manner so as to adequately envelop the outward projecting part of the reservoir from the exterior in order to avoid any temperature drop in the accumulation reservoir.

17. An asphalt recycling system according to claim 1, wherein said frame has a right-angled triangle-like form in line with the forms of the transmission channel and the hot air circulation channel.

18. An asphalt recycling system according to claim 1, wherein said frame comprises support legs to transfer hot RAP material output from the RAP material discharge mechanism to an asphalt mixer.

19. An asphalt recycling system according to claim 1, wherein the RAP material to be recycled for addition into a new mix is conveyed to said feeding mechanism by means of a vertical bucket elevator.

20. An asphalt recycling system according to claim 1, wherein said RAP material discharge mechanism comprises at least one shutter positioned at the lowermost point of the transmission channel and an optional whorl cylinder, in order to discharge for any reason any processed asphalt before arriving the accumulation reservoir.