EP2004912A1 - Recycling bitumen containing used material - Google Patents

Recycling bitumen containing used material

Info

Publication number
EP2004912A1
EP2004912A1 EP07747274A EP07747274A EP2004912A1 EP 2004912 A1 EP2004912 A1 EP 2004912A1 EP 07747274 A EP07747274 A EP 07747274A EP 07747274 A EP07747274 A EP 07747274A EP 2004912 A1 EP2004912 A1 EP 2004912A1
Authority
EP
European Patent Office
Prior art keywords
installation
degrees celsius
drum
wall
heated
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Withdrawn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
EP07747274A
Other languages
German (de)
French (fr)
Inventor
Caspar Jannis Van De Ven
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.)
Volker Stevin Materieel BV
Original Assignee
Volker Stevin Materieel BV
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 Volker Stevin Materieel BV filed Critical Volker Stevin Materieel BV
Publication of EP2004912A1 publication Critical patent/EP2004912A1/en
Withdrawn legal-status Critical Current

Links

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
    • E01C19/10Apparatus 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
    • E01C19/1013Plant characterised by the mode of operation or the construction of the mixing apparatus; Mixing apparatus
    • E01C19/1027Mixing in a rotary receptacle
    • E01C19/1036Mixing in a rotary receptacle for in-plant recycling or for reprocessing, e.g. adapted to receive and reprocess an addition of salvaged material, adapted to reheat and remix cooled-down batches
    • 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
    • E01C2019/1081Details not otherwise provided for
    • E01C2019/109Mixing containers having a counter flow drum, i.e. the flow of material is opposite to the gas flow
    • 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
    • E01C2019/1081Details not otherwise provided for
    • E01C2019/1095Mixing containers having a parallel flow drum, i.e. the flow of material is parallel to the gas flow

Definitions

  • This invention relates to a method and device to recycle bitumen containing used material, such as asphalt.
  • used material such as asphalt.
  • PR asphalt granules
  • the asphalt application temperature (approx.175 degrees Celsius) due to emission problems, while because of that the fresh mineral granules have to be heated to clearly beyond (approx. 220 degrees Celsius) the asphalt application temperature, to be able to obtain the desired asphalt application temperature for the end product (mixture of PR and fresh material) .
  • the drum wall will be heated externally and will heat the along the internal side of the spinning drum wall tumbling, rolling and advancing PR.
  • the PR within the drum is contained within parallel, longitudinally extending pipes, wherein the wall of said pipes is heated externally and heats the PR moving along the internal side of said wall.
  • the PR contacts a spinning wall part and is heated by it.
  • the PR is like bulk material.
  • bulk material means solidmaterial like debris, grains, particles, flakes, humps, etc., such that is can be poured or cast.
  • Preferably recycling is on a continuous or semi-continuous basis. This particularly means, that PR is supplied through the one opening and discharged through the other opening. These openings can be present at the same or opposite sides of the installation. Preferably a more or less continuous stream of PR through the installation is maintained, while without interruption a quantity PR is processed, which is substantially bigger than the fill capacity of the installation.
  • the PR is processed without altering the inclination of the element (s) passed by the PR.
  • said elements can be designed with a fixed spinning axis, yielding a simplification and cost reduction.
  • the installation is further preferably stationary, such that it can be dimensioned for large scale recycling.
  • Preferably adding/removing of PR takes place such that within the installation a pressure can be maintained that is different from the environment.
  • the supply and/or discharge of PR goes through a sluice or such sealing device.
  • the supply and/or discharge of gases and/or liquids is carried out such that within the installation a pressure can be maintained that differs from the environment, for which a convenient seal can be applied.
  • the installation has a pre heating part in which PR is indirectly heated by rest heat from the installation, e.g. from released steam.
  • the pre heating part can be double walled. It can contain a the PR contacting and heating, spinning wall .
  • the side of the wall contacting the PR can be provided with its contact surface increasing and/or movement of the PR influencing elements, such as ribs.
  • the PR is heated in a damp environment.
  • the desired end temperature of the PR between approx. 130 en 165 0 C
  • the humidity and pneumatic pressure within the installation are adapted correspondingly. Therefore humid PR is preferably supplied to the installation, preferably with a humidity of at least approx. 0.5 or 1.0 or 1.5 wt%.
  • the drawing shows in fig. 1-2 schematically non-limiting examples of embodiments.
  • the double walled drum is used with a horizontal or from the PR entrance (left in the drawing) downward inclined extending body axis .
  • the internal drum wall is driven by a motor (not shown) to spin around.
  • the external drum wall is mounted rotation fixed.
  • the internal drum wall is provided with inward projecting fixed blades, planks or such projections to, while the drum spins around, convey the into it poured PR in longitudinal drum direction towards the PR exit (to the right in the drawing) .
  • Said PR transport is possibly gravity supported due to the inclined attitude of the drum.
  • the annular gap shaped space between both drum walls has at the PR entrance a gas entrance to be fed by a heating gas, stemming from a hot gas generator (e.g. the hot combustion gasses of a burner) .
  • a hot gas generator e.g. the hot combustion gasses of a burner
  • PR is poured into the drum as a continuous stream of bulk material through the entrance and advances through it, wile tumbling/rolling/sliding, towards the PR exit while in the means time it is heated by contact with the drum wall.
  • gasses e.g. steam and bitumen gas
  • the hot gas generator At the PR exit from the drum released gasses (e.g. steam and bitumen gas) are preferably fed to the hot gas generator.
  • the heating gas and PR flow in the same direction along the drum wall. In an alternative embodiment these two substances can flow mutually opposite (counter flow) . In that case the locations of the gas entrance and gas exit are changed.
  • the entrances and exits for PR and hot gasses could be changed, such that the PR flows through the annular gap between the internal and external drum wall, while the heating gas flows within the internal drum wall.
  • a single walled main drum is used, to which a drum like, double walled pre heating part is connected upstream.
  • the main drum has double walled pipes, extending lengthwise of the main drum.
  • the pipes are fixedly located within the drum and the drum is turned around its longitudinal axis.
  • the pipes provide a capacity increase at equal space consumption by the installation.
  • the heated surface area increases and the payload ration decreases.
  • a compact and simple structure of the sealing structures between the moving and stationary parts of the drum is possible.
  • the pipes are preferably arranged with their body axis at substantially equal distance to the body axis of the main drum, such as the drawing also shows. If the drum spins, the pipes follow a circle while turning around.
  • PR is continuously fed to the pre heating part via a sluice.
  • the PR is indirectly heated by from the PR within the main drum stemming steam/moisture and possibly different hot gasses. The steam then condenses and is discharged as condensate.
  • the PR arrives into the main drum. There it is distributed over the pipes via a distribution element that is provided in the main drum.
  • Hot gas from a generator is also supplied to the main drum.
  • a supply channel for the hot gas extends centrally through the pre heating part and debouches at the upstream end in the main drum, centrally between the pipes.
  • Via a manifold the hot gas is distributed over the annular spaces of the double walled pipes.
  • the hot gas flows through the double wall of the pipes towards the downstream end of the main drum (to the right in the drawing) and arrives there via a manifold into a central discharge channel . Subsequently the gas is partly recirculated towards the generator and the rest comes, after passing of a heat exchanger, into the atmosphere.
  • the heat exchanger is located within the supply channel for the combustion air.
  • the hot gas thus remains outside the space within the main drum external of the double walled pipes.
  • the PR leaves the main drum also to the right in the drawing and arrives e.g. within a mixer in which the PR, minerals and/or different substances can be added.
  • the PR within the installation is present within a space that is sealed from the environment.
  • the hot gas passes through the installation in a closed circuit.
  • the steam and other gasses coming from the PR are collected and in a closed circuit passed on to a heat exchanger and preferably substantially as condensate discharged to the environment.
  • the PR within the installation is preferably exposed to pneumatic over pressure. To obtain that, in the moisture circuit (coming from the PR) a sealing member is preferably provided.
  • the drawing illustrates several preferred design parameters, such as temperatures (in °C) and flow rate (in e.g. Nm 3 /h) .
  • temperatures in °C
  • flow rate in e.g. Nm 3 /h
  • the PR enters the installation at a temperature of approximately 10 0 C, exits the pre heating part and the main drum at a temperature of approximately 70 respectively 130-165 0 C.
  • From the PR stemming moisture/steam of approx. 110 0 C is collected and supplied to the pre heating part and exits it as condensate with a temperature of approx. 90°C, such that most of the heat energy is transferred.
  • Hot gas is supplied at a temperature of approx. 800 0 C and cools to approx. 425 0 C due to heating of the PR.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Paving Machines (AREA)

Abstract

The invention relates to a method to recycle within an installation a continuous flow of asphalt granules, wherein a wall, contacting the granules, is heated at the side facing away from the granules, and heats the granules. The process is carried out at a pneumatic pressure head at moist conditions. The granules released from the installation are directly or via a mixer supplied to an asphalt spreading machine to be applied into a road surface.

Description

RECYCLING BITUMEN CONTAINING USED MATERIAL
This invention relates to a method and device to recycle bitumen containing used material, such as asphalt. In the following, this material is termed PR (asphalt granules) , unless stated differently.
Until now it was common to pour road material, roof covering material or other PR as bulk material into a spinning drum with approximately horizontal spinning axis and to expose the PR within the drum to the direct heat radiation and hot combustion gases of a within the drum burning, open flame. Subsequently the thus treated PR is fed to an asphalt installation and therein mixed with pre heated, fresh mineral granules, bitumen and additives. Due to (process) technical aspects the amount of PR in the new asphalt is limited to 50%. The most important aspect is that, prior to mixing in the mixer the PR in the drum of the prior art can not be heated further than clearly below (approx. 130 degrees Celsius) the asphalt application temperature (approx.175 degrees Celsius) due to emission problems, while because of that the fresh mineral granules have to be heated to clearly beyond (approx. 220 degrees Celsius) the asphalt application temperature, to be able to obtain the desired asphalt application temperature for the end product (mixture of PR and fresh material) .
In the mean time from the British patent publication GB2312949 a batch wise operating, mobile asphalt heating installation (on the market known as Polybatcher) is disclosed, of which the spinning drum is heated externally by the open flame of gas burners. Through the same opening the drum is both filled and emptied with asphalt material, for which reason the drum has to be stopped. It is thus impossible, to continuously process a quantity asphalt material substantially more than the fill capacity of the drum. Besides, the fill capacity of the drum of the prior art is low (not more than 100 litres) , such that the Polybatcher is merely suited for in situ heating of a small quantity new asphalt material for e.g. small repairs or to install a ramp at a residence. The Polybatcher is not designed to process PR, and the skilled man will also not think of doing that.
It is now proposed, to heat a the PR within the drum contacting wall at the side opposite the PR, and to arrange that this heated wall heats the contacting PR. According to a practical embodiment the drum wall will be heated externally and will heat the along the internal side of the spinning drum wall tumbling, rolling and advancing PR. According to another practical embodiment, the PR within the drum is contained within parallel, longitudinally extending pipes, wherein the wall of said pipes is heated externally and heats the PR moving along the internal side of said wall.
Thus the PR contacts a spinning wall part and is heated by it.
Preferably the PR is like bulk material. It will be appreciated that "bulk material" means solidmaterial like debris, grains, particles, flakes, humps, etc., such that is can be poured or cast. Thus it is for the first time possible to apply PR, from the drum, directly at the desired application temperature without the requirement of additional mixing with fresh minerals, bitumen or additives, into the road surface.
Preferably recycling is on a continuous or semi-continuous basis. This particularly means, that PR is supplied through the one opening and discharged through the other opening. These openings can be present at the same or opposite sides of the installation. Preferably a more or less continuous stream of PR through the installation is maintained, while without interruption a quantity PR is processed, which is substantially bigger than the fill capacity of the installation.
Preferably the PR is processed without altering the inclination of the element (s) passed by the PR. Structurally this means, that said elements can be designed with a fixed spinning axis, yielding a simplification and cost reduction. The installation is further preferably stationary, such that it can be dimensioned for large scale recycling.
One can indeed speak of a tempered, indirect heat exchange towards the PR with this invention, however in this way it can be guaranteed that the least possible amount of bituminous gas is released and preferably merely steam. It can also be guaranteed, that the atmosphere within the drum, to which the PR within the drum is exposed, is inert relative to the PR. Thus the PR can be heated at a higher temperature within the drum, to even the typical asphalt application temperature (±175°C) . It is thus possible, to use a substantial higher part PR, more then 50% and preferably more than 80%, even 100%, to make fresh asphalt. The bitumen quality is also maintained, such that adding of fresh bitumen can be limited/avoided.
Preferably adding/removing of PR takes place such that within the installation a pressure can be maintained that is different from the environment. For that the supply and/or discharge of PR goes through a sluice or such sealing device. In combination or as alternative the supply and/or discharge of gases and/or liquids is carried out such that within the installation a pressure can be maintained that differs from the environment, for which a convenient seal can be applied.
Preferably the installation has a pre heating part in which PR is indirectly heated by rest heat from the installation, e.g. from released steam. The pre heating part can be double walled. It can contain a the PR contacting and heating, spinning wall . For improved heat exchange the side of the wall contacting the PR can be provided with its contact surface increasing and/or movement of the PR influencing elements, such as ribs.
Preferably the PR is heated in a damp environment. Ideally, at the desired end temperature of the PR (between approx. 130 en 165 0C) , there still takes place that water goes into the atmosphere within the the PR containing space (e.g. the drum) . The humidity and pneumatic pressure within the installation are adapted correspondingly. Therefore humid PR is preferably supplied to the installation, preferably with a humidity of at least approx. 0.5 or 1.0 or 1.5 wt%.
Further advantages of the invention are a limitation of the exhaust of odour in relation with the recycling-volume; lower energy consumption per unit product (both by a higher process efficiency and by a higher part recycle material within the end product) ; cleaner waste or discharged gasses (such as exhaust gasses) , possibly such that the exhaust can be completely or partly ejected into the atmosphere without filtering. Besides, this method and the corresponding apparatuses can be applied to heat/dry recycling asphalt without the requirement to simultaneously have a parallel switched minerals drum operating.
The drawing shows in fig. 1-2 schematically non-limiting examples of embodiments.
According to the example of fig. 1 the double walled drum is used with a horizontal or from the PR entrance (left in the drawing) downward inclined extending body axis . The internal drum wall is driven by a motor (not shown) to spin around. The external drum wall is mounted rotation fixed. At the external side the internal drum wall is provided with inward projecting fixed blades, planks or such projections to, while the drum spins around, convey the into it poured PR in longitudinal drum direction towards the PR exit (to the right in the drawing) . Said PR transport is possibly gravity supported due to the inclined attitude of the drum.
The annular gap shaped space between both drum walls has at the PR entrance a gas entrance to be fed by a heating gas, stemming from a hot gas generator (e.g. the hot combustion gasses of a burner) . At the PR exit there is a gas exit for the heating gas which, through a heat exchanger, is led to a chimney, possibly after passing a (cloth) filter.
PR is poured into the drum as a continuous stream of bulk material through the entrance and advances through it, wile tumbling/rolling/sliding, towards the PR exit while in the means time it is heated by contact with the drum wall. At the PR exit from the drum released gasses (e.g. steam and bitumen gas) are preferably fed to the hot gas generator. At the PR exit released PR can directly or via a mixer be supplied to an asphalt spread machine to be applied into the road surface. With the embodiment as shown, the heating gas and PR flow in the same direction along the drum wall. In an alternative embodiment these two substances can flow mutually opposite (counter flow) . In that case the locations of the gas entrance and gas exit are changed. In another alternative the entrances and exits for PR and hot gasses could be changed, such that the PR flows through the annular gap between the internal and external drum wall, while the heating gas flows within the internal drum wall.
In the example of fig. 2 a single walled main drum is used, to which a drum like, double walled pre heating part is connected upstream. The main drum has double walled pipes, extending lengthwise of the main drum. In the illustrated embodiment there are six such pipes. However that can be less or more, e.g. three, four, five or seven. The pipes are fixedly located within the drum and the drum is turned around its longitudinal axis. The pipes provide a capacity increase at equal space consumption by the installation. The heated surface area increases and the payload ration decreases. A compact and simple structure of the sealing structures between the moving and stationary parts of the drum is possible. The pipes are preferably arranged with their body axis at substantially equal distance to the body axis of the main drum, such as the drawing also shows. If the drum spins, the pipes follow a circle while turning around.
From the left hand side of the drawing, PR is continuously fed to the pre heating part via a sluice. Within the pre heating part the PR is indirectly heated by from the PR within the main drum stemming steam/moisture and possibly different hot gasses. The steam then condenses and is discharged as condensate.
From the pre heating part the PR arrives into the main drum. There it is distributed over the pipes via a distribution element that is provided in the main drum. Hot gas from a generator is also supplied to the main drum. In the illustrated example a supply channel for the hot gas extends centrally through the pre heating part and debouches at the upstream end in the main drum, centrally between the pipes. Via a manifold the hot gas is distributed over the annular spaces of the double walled pipes. The hot gas flows through the double wall of the pipes towards the downstream end of the main drum (to the right in the drawing) and arrives there via a manifold into a central discharge channel . Subsequently the gas is partly recirculated towards the generator and the rest comes, after passing of a heat exchanger, into the atmosphere. The heat exchanger is located within the supply channel for the combustion air.
The hot gas thus remains outside the space within the main drum external of the double walled pipes.
The PR leaves the main drum also to the right in the drawing and arrives e.g. within a mixer in which the PR, minerals and/or different substances can be added. The PR within the installation is present within a space that is sealed from the environment. The hot gas passes through the installation in a closed circuit. The steam and other gasses coming from the PR are collected and in a closed circuit passed on to a heat exchanger and preferably substantially as condensate discharged to the environment. The PR within the installation is preferably exposed to pneumatic over pressure. To obtain that, in the moisture circuit (coming from the PR) a sealing member is preferably provided.
The drawing illustrates several preferred design parameters, such as temperatures (in °C) and flow rate (in e.g. Nm3/h) . A variation of 10% or 20% to these values is possible. E.g. the PR enters the installation at a temperature of approximately 10 0C, exits the pre heating part and the main drum at a temperature of approximately 70 respectively 130-1650C. From the PR stemming moisture/steam of approx. 110 0C is collected and supplied to the pre heating part and exits it as condensate with a temperature of approx. 90°C, such that most of the heat energy is transferred. Hot gas is supplied at a temperature of approx. 8000C and cools to approx. 4250C due to heating of the PR. Alternatives are also feasible, all belonging to the invention, e.g. wherein the inner drum wall is stationary and containing e.g. a spinning conveyor screw or different conveying element, to in that manner convey the PR through the drum. Therefore, all described or in the drawing illustrated features in isolation or arbitrary combination determine the subject matter of this invention.
Reference signs in the drawing 1 drum (length 12, diameter 3 meter) 2 double wall (stationary)
3 end product 80 ton/h
4 unprocessed granules 80 ton/h 3.5% moisture hot gas generator 6 additional cooling air burner 720 m3gas/h (9m3/ton) combustion air 7200 Nm3/h steam + bitumen gas 3600 Nm3/h heat exchanger 11 alternative track cloth filter 13 environmental air hot gas 11.500 Nm3/h 15 recirculation valve cross section drum with six tubes condensate 18 steam chimney 20 pre heating

Claims

1. Method to recycle within an installation bitumen containing used material, e.g. bulk material, wherein a wall contacting the material is heated at the side facing away from said material, and said wall heats the contacting material, wherein said wall preferably spins and wherein preferably the material through the one opening is supplied and through the other opening is discharged such that a more or less continuous flow is maintained.
2. Method according to claim 1, wherein within the installation the material is heated at above 130, 140, 150, 160 or 170 degrees Celsius, such as at the typical asphalt application temperature (approx. 175 degrees Celsius) , and/or the installation/wall has the contact surface area increasing and/or movement of the material influencing elements.
3. Method according to claim 1 or 2, wherein it is operated such that the material within the installation is exposed to a relative to the environment different pneumatic pressure, preferablypressure head, e.g. in that the supply and/or discharge of the material and/or gasses/liquids goes through a sealing feature .
4. Method according to any of claims 1-3, wherein the installation has a preferably double walled pre heating part in which the material is indirectly heated by rest warmth from the installation, e.g. from released moisture/steam.
5. Method according to any of claims 1-4, wherein the material is heated at moist conditions, preferably such that at the desired end temperature of the material (e.g. between approx. 130 en 165 0C) , there is still water going into the atmosphere within the space containing the material.
6. Method according to any of claims 1-5, wherein the material is supplied to the installation while moist, preferably with a moisture content of at least approx. 0,5 or 1,0 or 1,5 wt%.
7. Method according to any of claims 1-6, wherein material that is released from the installation is directly or via a mixer supplied to a road production machine, such as an asphalt laying machine to be applied into a road surface, and/or the material moves tumbling/rolling/sliding through the installation.
8. Method according to any of claims 1-7, wherein the material is present within preferably three, four, five, six or seven tubes extending longitudinally co-extensive and the wall of said tubes
5 is heated externally, and/or wherein the inclination of the element (s) through which the material passes, is not changed.
9. Method according to any of claims 1-8, wherein the material enters the installation at a temperature between approximately 0 en 20 degrees Celsius, exits the pre heating part and the main
10 drum at a temperature of approximately 70 respectively 130-165 degrees Celsius, steam stemming from the material at approximately 110 degrees Celsius is collected and supplied to the pre heating part and exits it as condensate at a temperature of approximately 90 degrees Celsius, such that most of its warmth energy is
15 transferred within the pre heating part, hot gas at a temperature between approximately 400 and 900 degrees Celsius, such as about 800 degrees Celsius, is supplied and by virtue of heating of the material cools to between approximately 300 and 500, such as 425, degrees Celsius.
20 10. Method according to any of claims 1-9, wherein the material within the installation is present within a space sealed from the environment, the hot heating gas flows in closed circuit through the installation, the steam and other gasses coming from the material are collected and brought in closed circuit to a
25 heat exchanger and are preferably substantially as condensate discharged to the environment.
11. Device with means to carry out the method according to any of claims 1-10.
EP07747274A 2006-04-10 2007-04-03 Recycling bitumen containing used material Withdrawn EP2004912A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1031554 2006-04-10
PCT/NL2007/000092 WO2007117135A1 (en) 2006-04-10 2007-04-03 Recycling bitumen containing used material

Publications (1)

Publication Number Publication Date
EP2004912A1 true EP2004912A1 (en) 2008-12-24

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ID=38268943

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07747274A Withdrawn EP2004912A1 (en) 2006-04-10 2007-04-03 Recycling bitumen containing used material

Country Status (2)

Country Link
EP (1) EP2004912A1 (en)
WO (1) WO2007117135A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH703226B1 (en) * 2007-12-11 2011-12-15 Fapico Ag Procedure for the requalification and energy enhancement of bituminous aggregates.

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5083870A (en) * 1991-01-18 1992-01-28 Sindelar Robert A Asphalt plant with segmented drum and zonal heating

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7708800A (en) * 1977-08-10 1979-02-13 Moel Wegenbouwmaatschappij B V Used asphalted concrete reworking system - heats in vessel and mixes with new asphalt
US4245915A (en) * 1979-02-22 1981-01-20 Bracegirdle P E Apparatus for making asphalt concrete
US6267493B1 (en) * 1999-06-02 2001-07-31 Cmi Corporation Drum mixer having a plurality of isolated aggregate transport channels

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5083870A (en) * 1991-01-18 1992-01-28 Sindelar Robert A Asphalt plant with segmented drum and zonal heating

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2007117135A1 *

Also Published As

Publication number Publication date
WO2007117135A1 (en) 2007-10-18

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