ASPHALT RECYCLING SYSTEM AND METHOD FOR PRODUCING A NEW ASPHALT LAYER FROM THE ASPHALT TO BE RECYCLED

• US 20140269143A1
• Filed: 05/30/2014
• Published: 09/18/2014
• Est. Priority Date: 12/03/2011
• Status: Abandoned Application

• Current Assignee: E-Mak Makine Insaat Ticaret Ve Sanayi A.S.
• Original Assignee: E-Mak Makine Insaat Ticaret Ve Sanayi A.S.
• Inventors: GENCER, Mehmet Nezir
• Application Number:
  US14/291,083
• Publication Number:
  US 20140269143A1
• Time in Patent Office: Days
• US Class Current: 366/7
• CPC Class Codes: E01C 19/05 Crushing, pulverising or disintegrating apparatus preparing and placing involving breaking E01C19/466 ; in general B02C; Aggregate screening, cleaning, drying or heating apparatus; Dust-collecting arrangements specially adapted therefor
• 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

A hot asphalt recycling system, in order to obtain RAC, which is to be used in the production of one of the asphalt layers, from RAP material, characterized by comprising an inner air channel (25) which is positioned in the inner volume of the body (20), connects an air inlet pipe (241) which provides the primary hot air input to the body (20) to the said outer air channel (24) and at least a section of which extends at the vicinity of the transmission line (23) and a mixer (50) wherein the RAP, which is at the desired amount and which comes from the discharge mechanism (27), new bitumen at a predetermined amount and optionally at least one chemical additive are mixed for a predetermined period.

Claims

1. A hot asphalt recycling system comprising a heat-insulated body with a closed volume;

at least one RAP material transmission channel within said body, 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;

an outer air channel which encircles said transmission channel substantially and wherein hot air is circulated;

an accumulation reservoir which is formed inside the body and where the RAP at certain temperature is stored so as to preserve the temperature thereof; and

a discharge unit which is used to discharge the hot RAP material within the accumulation reservoir to the desired media;

in order to obtain RAC, which is to be used in the production of both of the asphalt layers (binder or bitumen base), from RAP material, characterized by comprising

an inner air channel which is positioned in the inner volume of the body, connects an air inlet pipe which provides the primary hot air input to the body to the said outer air channel and at least a section of which extends at the vicinity of the transmission line, in order to lengthen the path the hot air takes inside the body and thus in order to transfer the heat, which circulates inside the body, to the RAP in an efficient manner.

a mixer wherein the RAP coming from the discharge mechanism, new bitumen at a predetermined amount and optionally at least one chemical additive are mixed for a predetermined period;

in order to produce RAC from the hot RAP, accumulated in the accumulation reservoir, as independently of an asphalt plant.

2. The hot asphalt recycling system according to claim 1, characterized in that at least some part of said inner air channel comprises parts extending together with the transmission channel so as to partly extend substantially parallel to the transmission channel.

3. The hot asphalt recycling system according to claim 1, characterized in that a horizontal part passes through said air channel'"'"'s accumulation reservoir.

4. The hot asphalt recycling system according to claim 1, characterized in that said inner air channel comprises a lower part extending at the bottom part of the body;

an vertical part extending so as to contact the transmission channel inwardly along a part of the vertical edge of the body at the continuation of the lower part;

a horizontal part extending substantially horizontally at the continuation of said vertical part; and

an output part which extends at the continuation of the horizontal part so as to connect the inner air channel to the outer air channel.

5. The hot asphalt recycling system according to claim 1, characterized in that in order to provide the hot air exiting from the outer air channel to be transferred to the body inner volume again, an intermediate connection part is provided which connects the output of said outer air channel to a heating reservoir formed at the inner volume of the body.

6. The hot asphalt recycling system according to claim 5, characterized in that said heating reservoir comprises at least one first and one second directing wings extending on said heating reservoir body inner volume.

7. The hot asphalt recycling system according to claim 6, characterized in that the first directing wing at least comprises a flat part extending at least along a part of the diagonal edge of the body so as to have a certain distance in between.

8. The hot asphalt recycling system according to claim 6, characterized in that said second directing wing which extends beginning from a point substantially at a lower alignment of the first directing wing and which extends up to the vicinity of the lower part of the accumulation reservoir base.

9. The hot asphalt recycling system according to claim 1, characterized in that a bitumen feeding unit is provided which is controlled by the automatic control system and thanks to this, which provides new additional bitumen to be transferred to the mixer in desired times and in desired amounts.

10. The hot asphalt recycling system according to claim 1, characterized in that at least one chemical feeding unit is provided which is controlled by the automatic control system and thanks to this, which provides the transferring of chemical additive to the mixer in desired times and in desired amounts.

11. The hot asphalt recycling system according to claim 1, characterized in that a directing unit is provided which directs the material exiting from said mixer to the RAC silo or to an asphalt plant.

12. The hot asphalt recycling system according to claim 11, characterized in that said directing unit comprises at least one silo output, at least one asphalt plant output and at least one flap which closes the silo output or asphalt plant output as responsive to the commands of the automatic control system.

13. The hot asphalt recycling system according to claim 1, characterized in that in order to prevent the RAP from sticking to the inner walls of the transmission channel where the RAP is heated and becomes adhesive, said transmission plates have dimensions so as to contact substantially to the inner wall of the transmission channel.

14. The hot asphalt recycling system according to claim 1, characterized in that the subject matter system is operated independently from the asphalt plant and the RAC is produced which is to be used in the production of bitumen base.

15. The hot asphalt recycling system according to claim 1, characterized in that in case of cooperation with asphalt plant;

the RAC is produced which is to be used in the production of abrasion layer or binder.

16. A hot asphalt recycling method applied in order to obtain RAC, to be used in the production of one of the asphalt layers, from the RAP, characterized by comprising the steps of:

a) providing a body with a closed volume which is thermally and substantially insulated from the outer environment,

b) advancing the RAP inside a transmission channel extending in a direction so as to define at least three corners inside said body,

c) during said advancing process, circulating the hot air obtained from a hot air supply inside the inner volume of the body so as to provide heat transfer to a certain part of the RAP inside the transmission channel,

d) circulating the hot air along the outer circumference of the body so as to provide heat transfer to a certain part of the RAP inside the transmission channel,

e) circulating the hot air by directing the hot air inside the body so as to provide heat transfer to the RAP directly and indirectly,

f) circulating the heated RAP inside the body so as to be directed to the accumulation reservoir,

g) transferring the hot RAP inside the accumulation reservoir to a mixer at a predetermined arrangement,

h) transferring new additional bitumen and optionally at least one chemical additive to said mixer at a predetermined arrangement,

i) mixing the hot RAP material, new additional bitumen and optionally at least one chemical additive for a predetermined duration inside the mixer and discharging this mixture to the desired outer environment.

17. The hot asphalt recycling method according to claim 16, characterized in that in said step (c), the hot air is partly circulated at the vicinity of the transmission channel so as to be substantially parallel to the transmission channel.

18. The hot asphalt recycling method according to claim 16, characterized in that in said step (c), hot air is passed through the accumulation reservoir.

19. The hot asphalt recycling method according to claim 16, characterized in that in said step (e), hot air is circulated so as to advance along a certain part of the diagonal edge of the body.

20. The hot asphalt recycling method according to claim 16, characterized in that with respect to the operations options with or without asphalt plant, in said step (j), the material exiting from the mixer is directed to a silo or an asphalt plant.

21. The hot asphalt recycling method according to claim 16, characterized in that in case of operation independent of the asphalt plant, the RAC material which will form the bitumen base is produced.

22. The hot asphalt recycling method according to claim 16, characterized in that in case of cooperation with the asphalt plant, the RAC material which will form the abrasion or binder layer is produced.