EP3287726A1 - A device for preparing asphalt - Google Patents

A device for preparing asphalt Download PDF

Info

Publication number
EP3287726A1
EP3287726A1 EP16446502.3A EP16446502A EP3287726A1 EP 3287726 A1 EP3287726 A1 EP 3287726A1 EP 16446502 A EP16446502 A EP 16446502A EP 3287726 A1 EP3287726 A1 EP 3287726A1
Authority
EP
European Patent Office
Prior art keywords
base material
heating chamber
heating
duct
fan
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP16446502.3A
Other languages
German (de)
French (fr)
Inventor
Carl-Arne BENGTSSON
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Asfaltteknik Asfatek AB
Original Assignee
Asfaltteknik Asfatek AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Asfaltteknik Asfatek AB filed Critical Asfaltteknik Asfatek AB
Priority to EP16446502.3A priority Critical patent/EP3287726A1/en
Publication of EP3287726A1 publication Critical patent/EP3287726A1/en
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01CCONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/02Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
    • E01C19/05Crushing, pulverising or disintegrating apparatus; Aggregate screening, cleaning, drying or heating apparatus; Dust-collecting arrangements specially adapted therefor
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01CCONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/02Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
    • E01C19/10Apparatus or plants for premixing or precoating aggregate or fillers with non-hydraulic binders, e.g. with bitumen, with resins, i.e. producing mixtures or coating aggregates otherwise than by penetrating or surface dressing; Apparatus for premixing non-hydraulic mixtures prior to placing or for reconditioning salvaged non-hydraulic compositions
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01CCONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/02Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
    • E01C19/10Apparatus or plants for premixing or precoating aggregate or fillers with non-hydraulic binders, e.g. with bitumen, with resins, i.e. producing mixtures or coating aggregates otherwise than by penetrating or surface dressing; Apparatus for premixing non-hydraulic mixtures prior to placing or for reconditioning salvaged non-hydraulic compositions
    • E01C19/1004Reconditioning or reprocessing bituminous mixtures, e.g. salvaged paving, fresh patching mixtures grown unserviceable; Recycling salvaged bituminous mixtures; Apparatus for the in-plant recycling thereof
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01CCONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/02Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
    • E01C19/10Apparatus or plants for premixing or precoating aggregate or fillers with non-hydraulic binders, e.g. with bitumen, with resins, i.e. producing mixtures or coating aggregates otherwise than by penetrating or surface dressing; Apparatus for premixing non-hydraulic mixtures prior to placing or for reconditioning salvaged non-hydraulic compositions
    • E01C19/1009Plant wherein type or construction of the mixer are irrelevant
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26DRYING
    • F26BDRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00Drying solid materials or objects by processes involving the application of heat
    • F26B3/02Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air

Definitions

  • the present invention relates to a device for preparing asphalt, comprising a rotatable heating chamber having an intake end and a discharge end, a first rotation driver for rotating the heating chamber, a base material feeder arranged at the intake end, and a burner arranged at the intake end for heating the interior of the heating chamber.
  • a device for preparing asphalt such as disclosed in WO 98/49398 , is dependent on having an ability to dry and heat the base material to a sufficient extent also then the base material is cold and wet. In addition, it is important to remove hot gases from the heating chamber, in particular when they contain significant amounts of water vapour. In order to improve the heating function solutions have been made to use the heat content of the hot gases to pre-dry and/or preheat the base material.
  • One example thereof is shown in WO 98/49398 , where the gases are entered into the base material bin to act directly on the base material
  • US 2010020630 where heat exchangers are used to extract the heat of the hot gases.
  • the pre-heating of the base material is irregular.
  • a device for preparing asphalt comprising a rotatable heating chamber having an intake end and a discharge end, a base material feeder arranged at the intake end, and a burner arranged at the intake end for heating the interior of the heating chamber
  • the base material feeder comprises a pre-heating chamber having a first end and a second end, which second end is connected with the heating chamber, a base material bin, a base material transfer device, arranged to transfer the base material from the base material bin to the pre-heating chamber at its first end, wherein the pre-heating chamber is arranged to feed the base material into the heating chamber, and a gas suction device connected with the pre-heating chamber at its first end, wherein the gas suction device is arranged to suck gases from the heating chamber through the pre-heating chamber.
  • the pre-heating chamber is rotatable. By rotating the pre-heating chamber, the effect of the preheating is further increased.
  • the gas suction device comprises a fan, and a first duct arranged between the fan and the pre-heating chamber. This is a simple and reliable embodiment.
  • the base material transfer device is connected with the first duct. Thereby the base material is introduced in a controllable way to the pre-heating chamber.
  • the first duct comprises a sloping wall portion, sloping downwards from an end of the base material transfer device to the first end of the pre-heating chamber, wherein the sloping wall portion is arranged to receive base material from the base material transfer device. Thereby the base material is reliably fed into the preheating chamber.
  • the gas suction device comprises a second duct, which is arranged between the fan and the base material bin, and which is arranged to conduct gas from the fan into the base material bin. Therby, an additional use is made of the hot gases, and the pre-heating is further improved.
  • the device further comprising a mixer arranged at the discharge end of the heating chamber, and a binder feeder, connected with the mixer, wherein the mixer is arranged to receive heated base material from the heating chamber and mix it with the binder, and to output asphalt. It is advantageous to add the binder by means of a mixer at the discharge end.
  • An embodiment of the device 1 for preparing asphalt as shown in Fig. 1 , comprises a rotatable heating chamber 2 having an intake end 3 and a discharge end 4, a first rotation driver 5 for rotating the heating chamber 2, a base material feeder 6 arranged at the intake end 3, and a burner 7 arranged at the intake end 3 for heating the interior of the heating chamber 2.
  • the base material can be either merely aggregates, a blend of aggregates and recycled asphalt, or even merely recycled asphalt. That is, the amount of recycled asphalt can be from 0% to 100%. However, in order to obtain a homogeneous quality of the produced asphalt at least a fraction of aggregates is preferable.
  • the base material feeder 6 comprises a pre-heating chamber 8 having a first end 9 and a second end 10, which second end 10 is connected with the heating chamber 2, for delivering base material to the heating chamber 2, a base material bin 11, and a base material transfer device 12, arranged to transfer the base material from the base material bin 11 to the pre-heating chamber 8, which receives the base material at its first end 9.
  • the base material feeder 6 further comprises a gas suction device 13 connected with the pre-heating chamber 8 at its first end 9.
  • the pre-heating chamber 8 is arranged to feed the base material 14 into the heating chamber 8.
  • the gas suction device 13 is arranged to suck gases from the heating chamber 2 through the pre-heating chamber 8.
  • the pre-heating chamber 8 is rotatable, and the device further comprises a second rotation driver 15 for rotating the pre-heating chamber 8.
  • the heating chamber 2 is most schematically shown, to merely illustrate a general structure and function thereof.
  • the heating chamber 2 is cylindrical and can be any known heating chamber 2 that is suitable, as will be understood by the person skilled in the art, such as the heating chamber disclosed in above-mentioned WO 98/49398 .
  • the heating chamber of WO 98/49398 is, however, advantageous in that the base material does not fall down through the flame of the burner 7 but is kept tumbling around in open grooves extending along the length of the heating chamber 2 at the interior thereof. The heated air is enabled to enter the grooves and heat the base material.
  • the rotation drivers 5, 15 can be realized by any suitable devices, such as electrically driven friction rollers.
  • a friction roller 5, 15 rotates the chamber 2, 8 by means of a high friction surface which is engaged with the outer surface of the chamber 2, 8.
  • the gas suction device 13 comprises a fan 16, and a first duct 17 extending between the fan 16 and the pre-heating chamber 8.
  • the duct 17 has a first mouth 18 at the fan 16, and second mouth 19 at the first end 9 of the pre-heater 8.
  • At least a portion 20 of the first duct 17 is inclined, such that it extends obliquely upwards from the pre-heating chamber 8.
  • the inclined portion 20 comprises, or is constituted by, a sloping wall portion 21, sloping downwards from an end of the base material transfer device 12 to the first end 9 of the pre-heating chamber 8, wherein the sloping wall portion 21 is arranged to receive base material 14 from the base material transfer device 12.
  • the base material transfer device 12 comprises any kind of suitable material conveyor, e.g. a belt conveyor.
  • the first duct 17 comprises an inlet 26 for receiving the base material from the base material transfer device 12. Furthermore, the first duct 17 comprises a pivoting door 27, which is arranged to pivot about a horizontal axis, and which is pivotally attached to a wall portion 28 defining an upper edge of the inlet 26.
  • the door 27 is arranged to close the inlet when no base material is fed through it, and to be pushed away by the base material when fed. Thus, the door 27 rests on top of the fed through base material 14 and minimizes the leakage of hot gases rearwards out of the inlet.
  • a biasing spring can be provided.
  • the closing force must not be too large because then the door 27 would prevent the base material from passing the inlet 26.
  • the gas suction device 13 comprises a second duct 22, which is arranged between the fan 16 and the base material bin 11, and which is arranged to conduct gas from the fan 16 into the base material bin 11.
  • the device for preparing asphalt 1 further comprises a mixer 23 arranged at the discharge end 4 of the heating chamber 2, and a binder feeder 24, connected with the mixer 23.
  • the mixer 23 is arranged to receive heated base material 14 from the heating chamber 2 and mix it with the binder, and to output asphalt 25.
  • the device for preparing asphalt 1 is operated as follows.
  • the base material 14 is fed, by means of the base material transfer device 12 from the bottom of the base material bin 11 to the inlet 28, where the base material 14 falls down onto the sloping wall portion 21 and slides through the inlet 28, passed the door 27 and further down into the pre-heating chamber 8.
  • the base material then moves forward through the pre-heating chamber while being tumbled by the rotating pre-heating chamber 8, which is slightly sloping down towards the heating chamber 2.
  • the base material 14 is also tumbled while being heated by the burner 7.
  • the heating chamber 2 is slightly sloping down towards the mixer 23, and feeds the heated base material into the mixer at its second end 4.
  • the base material 14 is mixed with the binder the final asphalt 25 is produced and delivered from the mixer 23.
  • the mixing function e.g. by means of a mixing device arranged within the mixer 23, or by rotating the whole mixer 23.
  • the hot gases, often containing water vapour, generated by the burner 7 are sucked by means of the fan 16 out of the heating chamber 2 rearwards through the pre-heating chamber 8, i.e. opposite to the feeding direction of the base material 14, through the first duct 17, through the fan 16, and through the second duct 22 into the base material 14.
  • the tumbling base material 14 is subjected to the hot gases and becomes pre-heated.
  • the pre-heating primarily involves drying the base material, but also heating it to a certain extent.
  • the second duct 22 can be arranged to end a distance down into the inner of the bin 11, or at an upper rim of the bin 11.
  • the flow through the pre-heater 8 is kept on approximately the same level independent of the kind of base material in the bin 11. If the second duct ends deep down in the base material and base material contains fine fractions it may become an obstacle to the hot gases, and thereby decrease the flow through the preheating chamber 8.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Road Paving Machines (AREA)

Abstract

A device for preparing asphalt (1), comprising a rotatable heating chamber (2) having an intake end (3) and a discharge end (4), a base material feeder (6) arranged at the intake end, and a burner (7) arranged at the intake end for heating the interior of the heating chamber. The base material feeder comprises a pre-heating chamber (8) having a first end (9) and a second end (10), which second end is connected with the heating chamber, a base material bin (11), a base material transfer device (12), arranged to transfer the base material from the base material bin to the pre-heating chamber at its first end, and a gas suction device (13) connected with the pre-heating chamber at its first end. The pre-heating chamber is arranged to feed the base material into the heating chamber, and the gas suction device is arranged to suck gases from the heating chamber through the pre-heating chamber.

Description

    FIELD OF THE INVENTION
  • The present invention relates to a device for preparing asphalt, comprising a rotatable heating chamber having an intake end and a discharge end, a first rotation driver for rotating the heating chamber, a base material feeder arranged at the intake end, and a burner arranged at the intake end for heating the interior of the heating chamber.
  • BACKGROUND OF THE INVENTION
  • A device for preparing asphalt, such as disclosed in WO 98/49398 , is dependent on having an ability to dry and heat the base material to a sufficient extent also then the base material is cold and wet. In addition, it is important to remove hot gases from the heating chamber, in particular when they contain significant amounts of water vapour. In order to improve the heating function solutions have been made to use the heat content of the hot gases to pre-dry and/or preheat the base material. One example thereof is shown in WO 98/49398 , where the gases are entered into the base material bin to act directly on the base material, and another example is shown in US 2010020630 , where heat exchangers are used to extract the heat of the hot gases. However, in the mentioned prior art devices, the pre-heating of the base material is irregular.
  • SUMMARY OF THE INVENTION
  • It would be advantageous to provide a device for preparing asphalt where the base material is pre-heated in a more regular way by means of the hot gases from the heating chamber.
  • To better address this concern, in a first aspect of the invention there is presented a device for preparing asphalt, comprising a rotatable heating chamber having an intake end and a discharge end, a base material feeder arranged at the intake end, and a burner arranged at the intake end for heating the interior of the heating chamber, wherein the base material feeder comprises a pre-heating chamber having a first end and a second end, which second end is connected with the heating chamber, a base material bin, a base material transfer device, arranged to transfer the base material from the base material bin to the pre-heating chamber at its first end, wherein the pre-heating chamber is arranged to feed the base material into the heating chamber, and a gas suction device connected with the pre-heating chamber at its first end, wherein the gas suction device is arranged to suck gases from the heating chamber through the pre-heating chamber. By sucking the hot gases through the pre-heating chamber the base material is more regularly pre-heated than in the prior art devices, and the whole process is more efficient.
  • In accordance with an embodiment of the device the pre-heating chamber is rotatable. By rotating the pre-heating chamber, the effect of the preheating is further increased.
  • In accordance with an embodiment of the device the gas suction device comprises a fan, and a first duct arranged between the fan and the pre-heating chamber. This is a simple and reliable embodiment.
  • In accordance with an embodiment of the device the base material transfer device is connected with the first duct. Thereby the base material is introduced in a controllable way to the pre-heating chamber.
  • In accordance with an embodiment of the device the first duct comprises a sloping wall portion, sloping downwards from an end of the base material transfer device to the first end of the pre-heating chamber, wherein the sloping wall portion is arranged to receive base material from the base material transfer device. Thereby the base material is reliably fed into the preheating chamber.
  • In accordance with an embodiment of the device the gas suction device comprises a second duct, which is arranged between the fan and the base material bin, and which is arranged to conduct gas from the fan into the base material bin. Therby, an additional use is made of the hot gases, and the pre-heating is further improved.
  • In accordance with an embodiment of the device further comprising a mixer arranged at the discharge end of the heating chamber, and a binder feeder, connected with the mixer, wherein the mixer is arranged to receive heated base material from the heating chamber and mix it with the binder, and to output asphalt. It is advantageous to add the binder by means of a mixer at the discharge end.
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • The invention will now be described in more detail and with reference to the appended drawings in which:
    • Fig. 1.is a schematic view of an embodiment of the device for preparing asphalt according to the present invention; and
    • Fig. 2 is an enlarged view of a part of the device shown in Fig. 1.
    DESCRIPTION OF EMBODIMENTS
  • An embodiment of the device 1 for preparing asphalt, as shown in Fig. 1, comprises a rotatable heating chamber 2 having an intake end 3 and a discharge end 4, a first rotation driver 5 for rotating the heating chamber 2, a base material feeder 6 arranged at the intake end 3, and a burner 7 arranged at the intake end 3 for heating the interior of the heating chamber 2.
  • It should be noted that the base material can be either merely aggregates, a blend of aggregates and recycled asphalt, or even merely recycled asphalt. That is, the amount of recycled asphalt can be from 0% to 100%. However, in order to obtain a homogeneous quality of the produced asphalt at least a fraction of aggregates is preferable.
  • The base material feeder 6 comprises a pre-heating chamber 8 having a first end 9 and a second end 10, which second end 10 is connected with the heating chamber 2, for delivering base material to the heating chamber 2, a base material bin 11, and a base material transfer device 12, arranged to transfer the base material from the base material bin 11 to the pre-heating chamber 8, which receives the base material at its first end 9. The base material feeder 6 further comprises a gas suction device 13 connected with the pre-heating chamber 8 at its first end 9.
  • The pre-heating chamber 8 is arranged to feed the base material 14 into the heating chamber 8. The gas suction device 13 is arranged to suck gases from the heating chamber 2 through the pre-heating chamber 8. Preferably, the pre-heating chamber 8 is rotatable, and the device further comprises a second rotation driver 15 for rotating the pre-heating chamber 8.
  • The heating chamber 2 is most schematically shown, to merely illustrate a general structure and function thereof. The heating chamber 2 is cylindrical and can be any known heating chamber 2 that is suitable, as will be understood by the person skilled in the art, such as the heating chamber disclosed in above-mentioned WO 98/49398 . The heating chamber of WO 98/49398 is, however, advantageous in that the base material does not fall down through the flame of the burner 7 but is kept tumbling around in open grooves extending along the length of the heating chamber 2 at the interior thereof. The heated air is enabled to enter the grooves and heat the base material.
  • The rotation drivers 5, 15 can be realized by any suitable devices, such as electrically driven friction rollers. A friction roller 5, 15 rotates the chamber 2, 8 by means of a high friction surface which is engaged with the outer surface of the chamber 2, 8.
  • The gas suction device 13 comprises a fan 16, and a first duct 17 extending between the fan 16 and the pre-heating chamber 8. The duct 17 has a first mouth 18 at the fan 16, and second mouth 19 at the first end 9 of the pre-heater 8. At least a portion 20 of the first duct 17 is inclined, such that it extends obliquely upwards from the pre-heating chamber 8. The inclined portion 20 comprises, or is constituted by, a sloping wall portion 21, sloping downwards from an end of the base material transfer device 12 to the first end 9 of the pre-heating chamber 8, wherein the sloping wall portion 21 is arranged to receive base material 14 from the base material transfer device 12. The base material transfer device 12 comprises any kind of suitable material conveyor, e.g. a belt conveyor.
  • Consequently, the first duct 17 comprises an inlet 26 for receiving the base material from the base material transfer device 12. Furthermore, the first duct 17 comprises a pivoting door 27, which is arranged to pivot about a horizontal axis, and which is pivotally attached to a wall portion 28 defining an upper edge of the inlet 26. The door 27 is arranged to close the inlet when no base material is fed through it, and to be pushed away by the base material when fed. Thus, the door 27 rests on top of the fed through base material 14 and minimizes the leakage of hot gases rearwards out of the inlet. Depending on how the door is made its own weight can be sufficient to generate a closing force on the door 27, or a biasing spring can be provided. On the other hand, the closing force must not be too large because then the door 27 would prevent the base material from passing the inlet 26.
  • The gas suction device 13 comprises a second duct 22, which is arranged between the fan 16 and the base material bin 11, and which is arranged to conduct gas from the fan 16 into the base material bin 11.
  • The device for preparing asphalt 1 further comprises a mixer 23 arranged at the discharge end 4 of the heating chamber 2, and a binder feeder 24, connected with the mixer 23. The mixer 23 is arranged to receive heated base material 14 from the heating chamber 2 and mix it with the binder, and to output asphalt 25.
  • The device for preparing asphalt 1 is operated as follows. The base material 14 is fed, by means of the base material transfer device 12 from the bottom of the base material bin 11 to the inlet 28, where the base material 14 falls down onto the sloping wall portion 21 and slides through the inlet 28, passed the door 27 and further down into the pre-heating chamber 8. The base material then moves forward through the pre-heating chamber while being tumbled by the rotating pre-heating chamber 8, which is slightly sloping down towards the heating chamber 2. In the heating chamber the base material 14 is also tumbled while being heated by the burner 7. The heating chamber 2 is slightly sloping down towards the mixer 23, and feeds the heated base material into the mixer at its second end 4. In the mixer 23 the base material 14 is mixed with the binder the final asphalt 25 is produced and delivered from the mixer 23. There are several different ways of providing the mixing function, e.g. by means of a mixing device arranged within the mixer 23, or by rotating the whole mixer 23.
  • The hot gases, often containing water vapour, generated by the burner 7 are sucked by means of the fan 16 out of the heating chamber 2 rearwards through the pre-heating chamber 8, i.e. opposite to the feeding direction of the base material 14, through the first duct 17, through the fan 16, and through the second duct 22 into the base material 14. In the pre-heater 8 the tumbling base material 14 is subjected to the hot gases and becomes pre-heated. When the base material 14 is wet, the pre-heating primarily involves drying the base material, but also heating it to a certain extent. As regards the pre-heating of the base material 14 in the base material bin 11, the second duct 22 can be arranged to end a distance down into the inner of the bin 11, or at an upper rim of the bin 11. In the latter case, only the base material at and close to the surface is pre-heated, but on the other hand the flow through the pre-heater 8 is kept on approximately the same level independent of the kind of base material in the bin 11. If the second duct ends deep down in the base material and base material contains fine fractions it may become an obstacle to the hot gases, and thereby decrease the flow through the preheating chamber 8.
  • While the invention has been illustrated and described in detail in the drawings and foregoing description, such illustration and description are to be considered illustrative or exemplary and not restrictive; the invention is not limited to the disclosed embodiments.
  • Other variations to the disclosed embodiments can be understood and effected by those skilled in the art in practicing the claimed invention, from a study of the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other elements or steps, and the indefinite article "a" or "an" does not exclude a plurality. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measured cannot be used to advantage. Any reference signs in the claims should not be construed as limiting the scope.

Claims (8)

  1. A device for preparing asphalt (1), comprising a rotatable heating chamber (2) having an intake end (3) and a discharge end (4), a base material feeder (6) arranged at the intake end, and a burner (7) arranged at the intake end for heating the interior of the heating chamber, wherein the base material feeder comprises a pre-heating chamber (8) having a first end (9) and a second end (10), which second end is connected with the heating chamber, a base material bin (11), a base material transfer device (12), arranged to transfer the base material from the base material bin to the preheating chamber at its first end, wherein the pre-heating chamber is arranged to feed the base material into the heating chamber, and a gas suction device (13) connected with the pre-heating chamber at its first end, wherein the gas suction device is arranged to suck gases from the heating chamber through the pre-heating chamber.
  2. The device as claimed in claim 1, wherein the pre-heating (8) chamber is rotatable.
  3. The device as claimed in claim 1 or 2, wherein the gas suction device (13) comprises a fan (16), and a first duct (17) arranged between the fan and the pre-heating chamber (8).
  4. The device according to claim 3, wherein the base material transfer device (6) is connected with the first duct (17).
  5. The device according to claim 4, wherein the first duct (17) comprises a sloping wall portion (21), sloping downwards from an end of the base material transfer device (6) to the first end (9) of the pre-heating chamber (8), wherein the sloping wall portion is arranged to receive base material (14) from the base material transfer device.
  6. The device according to any one of the claims 3 to 5, wherein the gas suction device (13) comprises a second duct (22), which is arranged between the fan (16) and the base material bin (11), and which is arranged to conduct gas from the fan into the base material bin.
  7. The device according to any one of the preceding claims, wherein the base material transfer device (6) comprises a belt conveyor (12).
  8. The device according to any one of the preceding claims, further comprising a mixer (23) arranged at the discharge end (4) of the heating chamber (2), and a binder feeder (24), connected with the mixer, wherein the mixer is arranged to receive heated base material from the heating chamber and mix it with the binder, and to output asphalt.
EP16446502.3A 2016-08-25 2016-08-25 A device for preparing asphalt Withdrawn EP3287726A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP16446502.3A EP3287726A1 (en) 2016-08-25 2016-08-25 A device for preparing asphalt

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP16446502.3A EP3287726A1 (en) 2016-08-25 2016-08-25 A device for preparing asphalt

Publications (1)

Publication Number Publication Date
EP3287726A1 true EP3287726A1 (en) 2018-02-28

Family

ID=56802434

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16446502.3A Withdrawn EP3287726A1 (en) 2016-08-25 2016-08-25 A device for preparing asphalt

Country Status (1)

Country Link
EP (1) EP3287726A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109518563A (en) * 2018-10-15 2019-03-26 惠安铁邦五金制品有限公司 A kind of magnetic centrifugal bubble removing road building materials are evenly heated mixing arrangement
SE545218C2 (en) * 2021-12-10 2023-05-30 Asfaltteknik Asfatek Ab A device for preparing asphalt comprising a rotatable heating chamber, a gas conduit, and a pre-heating duct

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4182631A (en) * 1975-08-11 1980-01-08 Mendenhall Robert Lamar Asphalt-aggregate production
US5735223A (en) * 1995-01-11 1998-04-07 Amon; Thomas R. Method for disposing of paper in an asphalt plant
WO1998049398A1 (en) 1997-04-25 1998-11-05 Asfaltteknik I Gällö Ab Method and device for preparing asphalt
US20100020630A1 (en) 2008-07-22 2010-01-28 Terex Usa, Llc Pre-aggregate drying method and energy efficient asphalt plant
JP2011149142A (en) * 2010-01-19 2011-08-04 Nikko Co Ltd Asphalt plant

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4182631A (en) * 1975-08-11 1980-01-08 Mendenhall Robert Lamar Asphalt-aggregate production
US5735223A (en) * 1995-01-11 1998-04-07 Amon; Thomas R. Method for disposing of paper in an asphalt plant
WO1998049398A1 (en) 1997-04-25 1998-11-05 Asfaltteknik I Gällö Ab Method and device for preparing asphalt
US20100020630A1 (en) 2008-07-22 2010-01-28 Terex Usa, Llc Pre-aggregate drying method and energy efficient asphalt plant
JP2011149142A (en) * 2010-01-19 2011-08-04 Nikko Co Ltd Asphalt plant

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
OFFICE OF AIRPORT SAFETY & STANDARDS: "Parallel-Flow Drum-Mix Plants", 27 September 2013 (2013-09-27), XP055342653, Retrieved from the Internet <URL:https://www.faa.gov/documentLibrary/media/advisory_circular/150-5370-14A/150_5370_14a_app1_part_II_c.pdf> [retrieved on 20170206] *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109518563A (en) * 2018-10-15 2019-03-26 惠安铁邦五金制品有限公司 A kind of magnetic centrifugal bubble removing road building materials are evenly heated mixing arrangement
SE545218C2 (en) * 2021-12-10 2023-05-30 Asfaltteknik Asfatek Ab A device for preparing asphalt comprising a rotatable heating chamber, a gas conduit, and a pre-heating duct
SE2151511A1 (en) * 2021-12-10 2023-05-30 Asfaltteknik Asfatek Ab A device for preparing asphalt comprising a rotatable heating chamber, a gas conduit, and a pre-heating duct

Similar Documents

Publication Publication Date Title
EP3287726A1 (en) A device for preparing asphalt
US4108334A (en) Apparatus for feeding scrap and base plastics material to an extruder
US5557858A (en) Infrared wood product dryer
US9234701B2 (en) Crushing drying device
US20080031080A1 (en) Counter-flow drum mixer asphalt plant method for two stage mixing
TW201033560A (en) Continuous drying apparatus
EP2202473A1 (en) Desiccator for inert material
JPH0216203A (en) Device and method of preparing bitumen product
US5551166A (en) Dryer drum coater having vented outer shell for VOC/NOx reduction
CN209726748U (en) A kind of pellet dryer
JP5680938B2 (en) Water-containing organic matter drying equipment
CN206714031U (en) One cultivates peanut drying device
CN107019038A (en) Peanut drying device
CN108004880A (en) A kind of hot recycling drying unit of asphalt
CN205448564U (en) Ventilation formula granule stirring drying cabinet
CN105918452A (en) Cereal dryer
CN107746588A (en) Powder surface modification method
KR20150047135A (en) Cement manufacturing device
CN208472514U (en) A kind of pitch regenerative system
CN211204829U (en) Flash evaporation dryer
US5251385A (en) Method of heating a grain dryer and apparatus therefor
CN209219104U (en) A kind of automatic steaming apparatus of tealeaves
NO313422B1 (en) Method and apparatus for making asphalt
CN206989671U (en) A kind of automatic smoke generating means for rubber smoked sheet production
CN206362139U (en) A kind of drying conveyor

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20180829