EP3412829B1 - Anlage und verfahren zur asphaltherstellung - Google Patents

Anlage und verfahren zur asphaltherstellung Download PDF

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Publication number
EP3412829B1
EP3412829B1 EP18176605.6A EP18176605A EP3412829B1 EP 3412829 B1 EP3412829 B1 EP 3412829B1 EP 18176605 A EP18176605 A EP 18176605A EP 3412829 B1 EP3412829 B1 EP 3412829B1
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EP
European Patent Office
Prior art keywords
drum
aggregates
coated material
recycling
drying
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Application number
EP18176605.6A
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English (en)
French (fr)
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EP3412829A1 (de
Inventor
Thierry De Sars
Hervé Riche
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Ermont
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Ermont
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/02—Machines, 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
    • E01C19/10—Apparatus 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
    • E01C19/1013—Plant characterised by the mode of operation or the construction of the mixing apparatus; Mixing apparatus
    • E01C19/1027—Mixing in a rotary receptacle
    • E01C19/1036—Mixing 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
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/02—Machines, 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
    • E01C19/10—Apparatus 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
    • E01C19/1059—Controlling the operations; Devices solely for supplying or proportioning the ingredients
    • E01C19/1068—Supplying or proportioning the ingredients
    • E01C19/1072—Supplying or proportioning the ingredients the solid ingredients
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/02—Machines, 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
    • E01C19/10—Apparatus 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
    • E01C2019/1081—Details not otherwise provided for
    • E01C2019/109—Mixing containers having a counter flow drum, i.e. the flow of material is opposite to the gas flow
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/02—Machines, 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
    • E01C19/10—Apparatus 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
    • E01C2019/1081—Details not otherwise provided for
    • E01C2019/1095—Mixing containers having a parallel flow drum, i.e. the flow of material is parallel to the gas flow

Definitions

  • the present invention relates to the field of asphalt production facilities, in particular asphalt for road surfaces, with recycling of asphalt aggregates.
  • the aggregates For the drying and heating of the aggregates, it is possible to introduce the aggregates into a drying drum mounted to rotate around its central axis, the axis of the drum being inclined relative to the horizontal plane, and to circulate a flow of gas. hot in the drying drum to dry and heat the aggregates.
  • the fresh aggregates are introduced into the drying drum at the raised end thereof, and the hot aggregates are collected at the lowered end of the drying drum.
  • the aggregates Due to the rotation of the drying drum, the aggregates are raised and fall back forming a curtain of aggregates inside the drying drum, the flow of hot gas passing through the curtain of aggregates.
  • the gas flow circulates in the drying drum in the direction of advancement of the aggregates, i.e. from the raised end to the lowered end.
  • the gas flow circulates in the drying drum in the opposite direction to the direction of advancement of the aggregates, i.e. from the lowered end towards the raised end.
  • the mixing of dry and hot aggregates with the binder is carried out in a mixing section of the drying drum, in which case the drying drum is said to be “dryer-mixer” or in a separate external mixer separate from the drying drum.
  • a co-current drying-mixing drum comprising successively, from its raised end towards its lowered end, a drying section for drying the aggregates, a recycling ring for introducing asphalt mixes in the dryer-mixer, a drying section for mixing and drying the aggregates and asphalt aggregates, and a mixing section to knead the mixture with a filler binder, the filler binder being introduced into the kneading section.
  • the hot gases circulating in the drying-mixing drum are generated using a burner arranged inside the drying drum, near the raised end of the drying drum.
  • a counter-current mixer-dryer drum comprising successively from its raised end to its lowered end, a drying section for drying the aggregates, a recycling ring for introducing asphalt aggregates into the dryer drum -mixer, a mixing section for mixing the aggregates and the asphalt aggregates, and a mixing section for mixing the mixture with a filler binder, the filler binder being introduced into the kneading section.
  • the hot gases circulating in the drying drum are generated using a burner arranged inside the drying drum, generating a flame upstream from the point of introduction of the asphalt aggregates, the hot gases circulating towards the upstream.
  • a drying drum for drying the aggregates
  • a mixing drum separate from the drying drum, the aggregates and aggregates and the filler binder being introduced into the mixing drum.
  • the aggregates are for example superheated in the drying drum in order to provide the quantity of heat necessary for the heating of the aggregates of mixes in the mixing drum.
  • a counter-current dryer drum for drying the aggregates and a counter-current or co-current dryer drum for drying the asphalt aggregates, the aggregates and the asphalt aggregates and the filler binder then being introduced into an external mixer separate from the drying drums.
  • the flow of hot gases circulating in the drying drum for drying the asphalt aggregates is generated by a burner disposed in this drying drum or by a hot gas generator comprising a separate enclosure from the drying drum and a burner for generating the hot gases , the enclosure being fluidly connected to the drying drum to convey the hot gases into the drying drum.
  • FR2987631A1 discloses a counter-current or parallel current dryer drum provided with a recycling ring and associated with a separate mixer.
  • EP0342125A1 and EP1916337A1 each discloses a counter-current dryer drum provided with a recycling ring and associated with a separate mixer.
  • EP0437990A1 discloses a parallel-flow drying drum for drying asphalt aggregates, and a counter-flow drying drum and mixer provided with a recycling ring for the introduction of dried asphalt aggregates into the current drying drum parallel.
  • the “recycling rate” is the ratio of the quantity of mix aggregates to the sum of the quantity of mix aggregate and the quantity of fresh aggregates used in the composition of the mix.
  • One of the aims of the invention is to propose an installation for the production of asphalt mixes which can allow a high rate of recycling of mixtures of asphalt mixes while limiting polluting emissions.
  • the invention provides an asphalt production plant according to claim 1.
  • Optional characteristics are defined in claims 2 to 7
  • the invention also relates to a process for the production of mixes according to claim 8.
  • Optional characteristics are defined in claims 9 and 10.
  • the asphalt production facility 2 of the Figure 1 is configured for the production of asphalt mixes with recycling of asphalt mixtures, from fresh aggregates and fresh asphalt mixtures recycled.
  • freshness means that the aggregates or the asphalt aggregates are wet and cold and have not yet been dried - completely or partially - in plant 2.
  • the installation 2 comprises a drum 4 for drying aggregates by circulation of a gas flow in the drum 4.
  • the drum 4 extends along a central axis A and is rotatably mounted around its central axis A.
  • the central axis A is inclined at a non-zero angle relative to the horizontal plane.
  • the angle of inclination of the central axis A with respect to the horizontal plane is for example between 2 ° and 6 °.
  • the drum 4 therefore has a raised end 4A and a lowered end 4B.
  • the raised end 4A is located at a level higher than that of the lowered end 4B.
  • the raised end 4A defines an inlet for the fresh aggregates and the lowered end 4B defines an outlet for a mixture formed of the aggregates G and of the recycled asphalt aggregates AE introduced into the drum 4.
  • the installation 2 comprises a supply device 6 configured to supply the raised end 4A of the first drum 4 with fresh aggregates G.
  • downstream and upstream are understood with respect to the direction of circulation of the aggregates G in the drum 4, from the raised end 4A towards the lowered end 4B.
  • the installation 2 includes a hot gas generation device 8 configured to generate hot gases and to circulate the hot gases in the drum 4 from the raised end 4A to the lowered end 4B, ie in the same direction as the aggregates G.
  • the drum 4 is a drying drum called "parallel currents" or "co-currents”.
  • the device for generating hot gases 8 comprises a burner 10 arranged to generate a flame F inside the drum 4.
  • the burner 10 is configured to generate the flame F from a fuel and d 'an oxidizer.
  • the oxidizer is for example air.
  • the installation 2 comprises one or more recycling ring (s) 12, 14 arranged along the drum 4 for the introduction of asphalt aggregates AE inside the drum 4.
  • Each recycling ring 12 , 14 is arranged along the drum 4 at a distance from the raised end 4A and at a distance from the lowered end 4B.
  • the drum 4 comprises several consecutive drying sections TA, TI, TB along the drum 4.
  • the drum 4 is provided, on its internal surface, with lifting vanes 16 configured to raise the aggregates G and / or the asphalt aggregates AE, so to form, in operation, a curtain of aggregates and / or asphalt aggregates AE crossed by the hot gases circulating in the drum 4.
  • the lifting vanes 16 make it possible to create, respectively in each drying section TA, TI, TB, a more or less dense curtain.
  • the drum 4 comprises an upstream drying section TA located upstream of the recycling ring (s) 12, 14, and a downstream drying section TB located downstream of the recycling ring (s) 12, 14.
  • the drum 4 comprises several recycling rings 12, 14, the drum 4 comprises an intermediate drying section TI between each pair of adjacent recycling rings.
  • the upstream drying section TA is located upstream of the recycling ring 14 located most upstream.
  • the downstream drying section TB is located between the recycling ring 14 located furthest downstream, and the lowered end 4 of the drum 4.
  • the hot gases gradually cool down along the drum 4 due to the heat exchanges with the aggregates G and the aggregates of mixes AE present in the drum 4.
  • the hot gases are therefore progressively less and less hot when passing from one drying section to the next, moving from upstream to downstream of the drum 4.
  • the temperature of the hot gases gradually decreases along the drum 4 due to the heat exchanges, in particular with the aggregates G.
  • a fraction of asphalt aggregates introduced further upstream will be subjected to hot gases at a higher temperature than that of the hot gases to which a fraction of asphalt aggregates introduced further downstream is subjected. This makes it possible, for example, to subject fractions of asphalt aggregates having different contents of bond to hot gases at different temperatures.
  • the drum 4 comprises exactly two recycling rings 12, 14 delimiting between them an intermediate drying section TI.
  • the drum 4 comprises, from upstream to downstream, the upstream drying section TA, the intermediate drying section TI and the downstream drying section TB.
  • the installation 2 is configured for the introduction into the drum 4, selectively, of all of the asphalt aggregates AE via the recycling ring 12 located upstream, of all of the asphalt aggregates AE via the ring recycling 14 located downstream or from a first fraction of asphalt aggregates AE1 and a second fraction of asphalt aggregates AE2 via respectively the recycling ring 12 located upstream and the recycling ring 14 located downstream.
  • the first fraction of AE1 mix aggregates and the second fraction of AE2 mix aggregates have, for example, different binder contents.
  • the first fraction of AE1 asphalt aggregates introduced further upstream has a lower binder content than that of the second fraction of AE2 asphalt aggregates introduced further downstream.
  • the drum 4 does not have a mixing section configured for the mixing of the aggregates G and of the asphalt aggregates AE.
  • the aggregate coating installation 2 comprises an external mixer 20 configured to knead the mixture of aggregates G and of aggregates of mixtures AE emerging from the drum 4, at the lowered end 4B thereof.
  • the mixer 20 is distinct and separate from the drum 4. It receives the mixture of aggregates G and of asphalt aggregates AE after the latter has left the drum 4.
  • the AE mix aggregates mixed with the G aggregates already contain binder, called “recycling binder”, coming from the AE mix aggregates. It may also be necessary to supply additional binder, known as a “binder”.
  • the filler binder is for example bitumen.
  • the installation 2 comprises a device for supplying filler binder 22 for introducing filler binder into the mixer 20.
  • the installation 2 comprises a recycling circuit 24, configured to collect binder vapors present in the mixer 20 and to reinject them into the installation 2 so that the binder vapors are incinerated in the flame F of the burner 10.
  • the recycling circuit 24 is here configured to reinject the binder vapors into the drum 4, upstream of the flame F generated by the burner 10, so that the binder vapors are incinerated in the flame F.
  • the recycling circuit 24 is here configured to reinject the binder vapors into the drum 4, at the raised end 4A of the drum 4.
  • the installation 2 comprises a gas manifold 26 arranged at the lowered end 4B of the drum 4 for collecting the hot gases leaving the drum 4, and a filtering device 28 fluidly connected to the gas manifold 26 for filtering the gases collected by the gas collector 26.
  • the filtering device 28 is for example a bag filter.
  • an external mixer 20 distinct and separate from the drum 4 avoids exposing the supply binder to hot gases and makes it possible to collect the binder vapors generated in the mixer 20 and the hot gases leaving the drum 4 separately .
  • the gas collector 26 and the recycling circuit 24 are distinct and separate.
  • the installation 2 comprises a heat exchanger 30 disposed downstream of the filtering device 28 is configured for a heat exchange between the hot gases filtered by the filtering device 28 and an oxidant supplying the burner 10.
  • the oxidant is here from the air.
  • the heat exchanger 30 is a separate flow.
  • the hot gases and the oxidizer are not in contact during the heat exchange. They exchange heat through one or more walls.
  • the heat exchanger 30 is here a gas / gas heat exchange, configured for a heat exchange between the filtered hot gases and the oxidant which is in the gaseous state.
  • the installation 2 comprises a chimney 32 for the evacuation of the hot gases filtered into the atmosphere.
  • the chimney 32 is here arranged downstream of the heat exchanger 30.
  • the chimney 32 is for example disposed directly downstream of the filtering device 28.
  • the drum 4 is rotated about its central axis A and the hot gases generated by the burner 10 circulate in the drum 4 from the raised end 4A to the lowered end 4B.
  • the aggregates G are introduced at the raised end 4A of the drum 4. They are first dried alone in the upstream drying section TA. They are then mixed with aggregates of mixtures AE introduced into the drum 4 via one or more recycling rings 12, 14, which are mixed and dried with the aggregates in the or each possible intermediate drying section TI and in the downstream drying section TB.
  • the aggregates G and the aggregates of mixes AE mixed and dried emerge from the drum 4 through the lowered end 4B.
  • the aggregates G and the asphalt aggregates AE are kneaded in the mixer 20, with filler binder.
  • the hot gases are collected at the lowered end 4 of the drum 4 by the gas collector 26, then filtered by the filtering device 28.
  • a heat exchange is carried out between the filtered hot gases and the oxidant supplying the burner 10, in the heat exchanger 30.
  • the binder vapors recovered in the mixer 20 are reintroduced into the installation 2 so as to be incinerated by the flame F of the burner 10.
  • the temperature of hot gases decreases from upstream to downstream due to the heat exchanges with the aggregates G and the aggregates of mixes AE.
  • the temperature of the hot gases in the successive drying sections gradually decreases.
  • the selective use of one or more recycling rings among the plurality of recycling rings 12, 14 makes it possible to expose the aggregates of coated materials AE to hot gases at a more or less high temperature, and / or different fractions of asphalt aggregates to hot gases at different temperatures. This makes it possible to expose aggregates of AE mixtures having a higher content of binder to hot gases at very moderate temperature, further limiting the emissions of binder vapors by the mixtures of AE mixtures.
  • the mixer 20 separate from the drum 4 makes it possible to supply filler binder outside the drum 4, this filler binder not being exposed to hot gases.
  • the binder vapors generated in the mixer 20 are not carried to the filtering device 28 and are not ultimately released into the atmosphere.
  • the separate mixer 20 limits the binder vapors in the hot gases collected at the outlet of the drum 4.
  • the reduction in the binder vapors in the hot gases collected at the outlet of the drum 4 limits the risk of fouling of the heat exchanger 30 and preserves its efficiency.
  • the heat exchanger 30 makes it possible to recover part of the energy of the hot gases exiting in the drum 4 and to reinject it into the drum 4. It makes it possible to increase the efficiency of the burner 10, and therefore the efficiency of the installation 2.
  • the aggregate coating plant 2 makes it possible to obtain a significant recycling rate while limiting polluting emissions.
  • Installation 2 of the Figure 2 differs from that of the Figure 1 in that it comprises a single recycling ring 12.
  • the drum 4 has exactly two mixing sections, namely the upstream drying section TA, located upstream of the recycling ring 12, and the downstream drying section TB located between the recycling ring 12 and the lowered end 4B of the drum 4.
  • the asphalt aggregates AE are introduced into the drum 4 via the recycling ring 12.
  • the invention also relates to an asphalt production plant, comprising at least one drying drum mounted to rotate about a central axis inclined at a non-zero angle relative to a horizontal plane, the drum having a raised end and a lowered end, a burner configured to generate a flow of hot gas flowing through the drum, and a plurality of recycle rings disposed along the drum spaced apart, for the introduction of asphalt aggregates inside the drum via one or more of the plurality of recycling rings, the drum comprising a drying section intermediate between each pair of adjacent recycling rings.
  • a heat exchanger 30 arranged for a heat exchange between hot gases coming from the drum 4 and an oxidizer, for example air, supplying the burner 10, is advantageous independently of the particular configuration of installation 2 described above.
  • the invention also relates to an installation for the production of mixes, comprising at least one drying drum mounted to rotate about a central axis inclined at a non-zero angle relative to a horizontal plane, the drum a raised end and a lowered end, a burner configured to generate a flow of hot gas flowing through the drum, and a heat exchanger arranged for heat exchange between hot gases having circulated in the drum and an oxidant, for example air, supplying the burner.
  • the heat exchanger may be arranged downstream of a device for filtering the hot gases having circulated in the drum, in particular between the filtering device and a chimney for discharging the hot gases.
  • the drum can be co-current, the gas flow circulating in the same direction as the aggregates, ie from the raised end towards the lowered end, or against the current, the gas flow circulating in the opposite direction of the aggregates , ie from the lowered end to the raised end.
  • the drum can be a drying drum associated with a separate mixer, or a drying-mixing drum comprising a mixing section provided for mixing the aggregates and any asphalt aggregates introduced into the drum with a filler binder.
  • the aggregate coating installation can optionally include at least one recycling ring arranged along the drum for the introduction of asphalt aggregates inside the drum.
  • the aggregate coating installation can for example comprise several recycling rings, for example two recycling rings.

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

Claims (10)

  1. Einrichtung zur Produktion von Bitumen ausgehend von Granulaten (G) und von recycelten Bitumen-Zusätzen (AE), aufweisend:
    - eine Trockner-Trommel (4), die um eine zentrale Achse (A) der Trommel (4) drehbar ist, wobei die Trommel (4) ein angehobenes Ende (4A) für die Einführung der Granulate und ein abgesenktes Ende (4B) hat,
    - einen Brenner (10), der konfiguriert ist zum Erzeugen eines Heißgasstroms, der in der Trommel (4) von dem angehobenen Ende (4A) aus zu dem abgesenkten Ende (4B) hin strömt,
    - einen oder mehrere Rückschleusungsring/e (12, 14), der/die entlang der Trommel (4) angeordnet sind zur Einführung recycelter Bitumen-Zusätze (AE),
    - eine Filtervorrichtung (28), die konfiguriert ist zum Ausfiltern der Heißgase, die sich im abgesenkten Ende (4B) der Trommel (4) sammeln, und
    - ein Rührwerk (20), das von der Trommel (4) separiert ist und konfiguriert ist zum Mischen der Granulate (G) und der recycelten Bitumen-Zusätze (AE), die aus der Trommel (4) austreten, mit einem Zufuhr-Bindemittel,
    wobei die Trommel (4) mehrere Trockner-Abschnitte entlang der Trommel (4) aufweist, wobei die Trommel (4) in jedem Trockner-Abschnitt (TA, TB) an ihrer Innenfläche ausgerüstet ist mit Hebeschaufeln (16), die konfiguriert sind zum Heben der Granulate (G) und/oder der Bitumen-Zusätze (AE), um im Betrieb einen Schleier aus Granulaten (G) und/oder aus Bitumen-Zusätzen (AE) zu bilden, der von den Heißgasen durchströmt wird, die in der Trommel (4) strömen,
    wobei die Trommel (4) einen Stromaufwärts-Trocknerabschnitt (TA) aufweist, der stromaufwärts des oder der Rückschleusungsrings/e (12, 14) angeordnet ist, wobei die Einrichtung zur Produktion von Bitumen dadurch gekennzeichnet ist, dass die Trommel (4) einen Stromabwärts-Trocknerabschnitt (TB) aufweist, der stromabwärts des oder der Rückschleusungsrings/e (12, 14) angeordnet ist.
  2. Einrichtung zur Produktion von Bitumen gemäß Anspruch 1, aufweisend eine Mehrzahl von Rückschleusungsringen (12, 14), die entlang der Trommel (4) in einem Abstand voneinander angeordnet sind, wobei die Trommel (4) einen Zwischen-Trocknerabschnitt (TI) zwischen jedem Paar benachbarter Rückschleusungsringe (12, 14) aufweist.
  3. Einrichtung zur Produktion von Bitumen gemäß Anspruch 2, aufweisend genau zwei Rückschleusungsringe (12, 14), wobei die Trommel (4) einen Zwischen-Trocknerabschnitt (TI) aufweist, der zwischen den beiden Rückschleusungsringen (12, 14) angeordnet ist.
  4. Einrichtung zur Produktion von Bitumen gemäß irgendeinem der vorhergehenden Ansprüche, aufweisend einen Rückführungskreis (24), der konfiguriert ist zum Sammeln von Bindemittel-Dämpfen, die in dem Rührwerk (20) vorliegen, und zum Wiederinjizieren dieser in die Einrichtung zur Bitumenerstellung aus Granulaten, so dass sie in einer von dem Brenner (10) erzeugten Flamme verbrannt werden.
  5. Einrichtung zur Produktion von Bitumen gemäß irgendeinem der vorhergehenden Ansprüche, wobei der Brenner (10) am Eingang der Trommel (4) angeordnet ist, um eine Flamme im Inneren der Trommel (4) zu erzeugen.
  6. Einrichtung zur Produktion von Bitumen gemäß irgendeinem der vorhergehenden Ansprüche, aufweisend einen Wärmetauscher (30), der konfiguriert ist zum Transferieren von Wärme der Gase, die von der Filtervorrichtung (28) ausgefiltert werden, zu einem Sauerstoffträger hin, den Brenner (10) versorgend.
  7. Einrichtung zur Produktion von Bitumen gemäß Anspruch 6, wobei der Wärmetauscher (30) angeordnet ist zwischen der Filtervorrichtung (28) und einem Abzug (32) zum Abziehen der ausgefilterten Gase zur Atmosphäre hin.
  8. Verfahren zur Produktion von Bitumen ausgehend von Granulaten (G) und von recycelten Bitumen-Zusätzen (AE), aufweisend
    - Einführen von Granulaten in eine drehbare Trockner-Trommel (4), wobei die Trommel (4) ein angehobenes Ende (4A) für die Einführung der Granulate und ein abgesenktes Ende (4B) hat,
    - Erzeugen eines Heißgasstroms, der in der Trommel (4) von dem angehobenen Ende (4A) aus zu dem abgesenkten Ende (4B) hin strömt,
    - Einführen von Bitumen-Zusätzen (AE) in die Trommel (4) über einen oder mehrere Rückschleusungsring/e, der/die entlang der Trommel (4) ist/sind,
    - Rückgewinnen und Ausfiltern der Heißgase, die aus der Trommel (4) austreten, in einer Filtervorrichtung (28) und
    - Mischen von Granulaten (G) und von Bitumen-Zusätzen (AE) mit einem Zufuhr-Bindemittel in einem Rührwerk (20), das von der Trommel (4) separat ist,
    wobei die Trommel (4) entlang der Trommel (4) mehrere Trockner-Abschnitte aufweist, wobei die Trommel (4) in jedem Trockner-Abschnitt (TA, TB) auf ihrer Innenfläche mit Hebeschaufeln (16) ausgestattet ist, die konfiguriert sind zum Heben der Granulate (G) und/oder der Bitumen-Zusätze (AE), um im Betrieb einen Schleier aus Granulaten (G) und/oder Bitumen-Zusätzen (AE) zu bilden, die von dem Heißgasen durchströmt werden, welche in der Trommel (4) strömen,
    wobei die Trommel (4) einen Stromaufwärts-Trocknerabschnitt (TA) aufweist, der stromaufwärts des oder der Rückschleusungsrings/e (12, 14) angeordnet ist, wobei das Verfahren zur Produktion von Bitumen dadurch gekennzeichnet, ist, dass die Trommel (4) einen Stromabwärts-Trocknerabschnitt (TB) aufweist, der stromabwärts des oder der Rückschleusungsrings/e (12, 14) angeordnet ist.
  9. Verfahren zur Produktion von Bitumen gemäß Anspruch 8, aufweisend das Einführen von Bitumen-Zusätzen (AE) über mehrere Rückschleusungsringe (12, 14), wobei die Trommel (4) zwischen jedem Paar benachbarter Rückschleusungsringe (12, 14) einen Zwischen-Trocknerabschnitt (TI) aufweist.
  10. Verfahren zur Produktion von Bitumen gemäß Anspruch 9, wobei ein erster Teil von Bitumen-Zusätzen (AE1), der über einen Stromaufwärts-Rückschleusungsring (12) eingeführt wird, einen Bindemittel-Gehalt aufweist, der kleiner ist als jener eines zweiten Teils von Bitumen-Zusätzen (AE2), die über einen Stromabwärts-Rückschleusungsring (14) eingeführt werden.
EP18176605.6A 2017-06-09 2018-06-07 Anlage und verfahren zur asphaltherstellung Active EP3412829B1 (de)

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FR1755170A FR3067371B1 (fr) 2017-06-09 2017-06-09 Installation et procede de production d'enrobes

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CN110280075B (zh) * 2019-01-31 2023-09-15 河南亚龙智能装备有限公司 一种沥青回收料加热设备及热能利用方法
FR3126432B1 (fr) * 2021-08-26 2023-08-04 Argumat Installation de production d’enrobes et procede de fabrication d’enrobes dans une telle installation de production d’enrobes
DE102021210662B4 (de) * 2021-09-24 2025-07-10 Benninghoven Zweigniederlassung Der Wirtgen Mineral Technologies Gmbh Vorrichtung und Verfahren zum Trocknen von Material sowie Asphaltmischanlage mit einer derartigen Vorrichtung

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FR2631354A1 (fr) * 1988-05-13 1989-11-17 Ermont Cm Dispositif et procede de preparation de produits bitumineux
FR2657097B1 (fr) * 1990-01-18 1992-05-15 Ermont Cm Dispositif de preparation de produits enrobes bitumineux comportant un tambour a courants paralleles et un tambour a contre-courant et procede correspondant.
FR2907810B1 (fr) * 2006-10-27 2008-12-26 Ap Technic Asphalt Plant Techn Dispositif de preparation d'un beton bitumineux
FR2987631B1 (fr) * 2012-03-05 2014-10-31 Famaro Centrale d'enrobage et procede de production d'enrobes, en particulier pour revetements routiers

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FR3067371A1 (fr) 2018-12-14
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EP3412829A1 (de) 2018-12-12

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