EP0437990B1 - Vorrichtung zur Aufbereitung von bituminösem Mischgut mit einer Gleichstrom- und einer Gegenstromtrommel und entsprechendes Verfahren - Google Patents

Vorrichtung zur Aufbereitung von bituminösem Mischgut mit einer Gleichstrom- und einer Gegenstromtrommel und entsprechendes Verfahren Download PDF

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Publication number
EP0437990B1
EP0437990B1 EP90403447A EP90403447A EP0437990B1 EP 0437990 B1 EP0437990 B1 EP 0437990B1 EP 90403447 A EP90403447 A EP 90403447A EP 90403447 A EP90403447 A EP 90403447A EP 0437990 B1 EP0437990 B1 EP 0437990B1
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EP
European Patent Office
Prior art keywords
drum
flow
gases
zone
outlet
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.)
Expired - Lifetime
Application number
EP90403447A
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English (en)
French (fr)
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EP0437990A1 (de
Inventor
Guy Marconnet
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Ermont CM
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Ermont CM
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    • 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
    • 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 invention relates to a device for preparing bituminous coated products, in particular products intended for road surfaces, from recycled bituminous materials, virgin aggregates and liquid bitumen comprising a drum with parallel currents and a drum with counter current.
  • the invention also relates to a process for preparing bituminous products using a first drum with parallel currents and a second drum with counter-current.
  • the drum which has a cylindrical envelope disposed with its longitudinal axis slightly inclined relative to the horizontal and rotatably mounted around this axis can be traversed by a flow of hot gases circulating between the inlet end of the materials and the end out of the drum, in the same direction as the solid materials.
  • a drum generally called a parallel current drum, comprises, to allow the introduction of recycled materials, a recycling ring arranged around the casing of the drum which is provided with devices for introducing materials through its side wall, at the recycling ring; the recycling ring is located in an area of the drum remote from its inlet end through which cold blank aggregates are introduced and through which a burner ensuring the circulation of hot gases in the drum, in the direction of circulation of solid materials.
  • bituminous recycled materials and the incorporation of liquid bitumen into solid materials which is carried out downstream of the recycling ring are carried out in an area relatively far from the burner flame, the bitumen-containing materials are exposed , inside the drum with hot gases capable of causing a certain thermal degradation of these bituminous materials and the formation of blue fumes by vaporization of the bitumen.
  • Drums also known as counter-current drums which comprise a burner having an elongated body penetrating through the outlet end of the drum, so that the end of the burner body from which the flame is formed opens into an area of the drum remote from its outlet end and its inlet end.
  • cold blank aggregates can be introduced through the inlet end of the drum, these cold aggregates then circulating in a first zone of the drum constituting a drying and heating zone, against the current compared to the circulation of hot gases from the area inside the drum in which the burner flame develops.
  • the liquid bitumen incorporated into the solid materials is introduced, through the outlet end of the drum, into a mixing zone situated around the body of the burner, downstream from the flame zone. The hot gases which circulate in the drum between the flame zone and the inlet end of the drum are therefore not circulated in the mixing zone.
  • Recycled bituminous materials can be introduced into the drum by a recycling ring situated at the level of the flame zone or slightly downstream from this zone (as described by EP-A-0 347 281).
  • Virgin aggregates and dried and heated recycled materials recovered from the drum at counter-current and the drum with parallel currents respectively are then introduced into a fixed kneading device in which the incorporation of the liquid bitumen and possibly other additives is carried out (as described by EP-A-0 216 316).
  • the drying gases of recycled materials which are likely to contain a certain proportion of bitumen vapor can be taken from the outlet of the parallel current drum to be introduced into the drum against the current, at the level of the burner flame.
  • Such devices are relatively complex and require the use of a fixed mixer such as a mixer with parallel shafts and a set of means for storing and dosing solid materials before their introduction into the mixer.
  • the object of the invention is therefore to propose a device for preparing bituminous coated products, from recycled bituminous materials, virgin aggregates and liquid bitumen comprising a dryer drum with parallel currents having an inlet end supplied with materials recycled and an outlet end of the dried and heated recycled materials, a counter-current drum dryer and mixer having an inlet end supplied with cold virgin aggregates and comprising an elongated burner entering the drum through its outlet end and opening in a flame zone remote from the ends of the drum, a material introduction ring into the drum through its side wall and a mixing zone into which a bitumen injection device opens, located around the body of the burner, in the end portion of the drum adjacent to the outlet end opposite the inlet end e by which virgin aggregates are introduced, this device allowing to incorporate large quantities of material recycled to aggregates, while being of a simple structure avoiding the use of a fixed mixer and complex storage and metering means.
  • the outlet end of the parallel current drum through which the dried and heated recycled materials exit is connected to the introduction ring by a material transfer means, the introduction ring of recycled materials emerging in a zone for mixing recycled materials and overheated virgin aggregates, located in the counter-current drum, around the burner body, between the flame zone and the mixing zone.
  • the invention also relates to a process for preparing bituminous coated products from recycled materials, virgin aggregates and liquid bitumen using a first drum with parallel currents and a second drum against the current.
  • Figure 1 is a schematic view of an installation for the preparation of bituminous materials comprising a device according to the invention.
  • Figure 2 is an elevational view of the two drums of the device according to the invention, in the case of a first embodiment.
  • Figure 3 is a section on 3-3 of Figure 2.
  • Figure 4 is a section similar to Figure 3 showing a second alternative embodiment of the device according to the invention.
  • Figure 5 is a schematic view substantially similar to Figure 1 of an installation according to the invention comprising means for recycling the gas from the drum with parallel currents in the burner of the drum against the current.
  • FIG 1 there is shown an installation for the preparation of bituminous coated materials comprising a first drum 1 of the type with parallel currents and a second drum 2 of the type with counter-current circulation.
  • the drum 1 comprises an envelope of generally cylindrical shape whose longitudinal axis is arranged with a slight inclination relative to the horizontal plane.
  • the drum 1 has an inlet end 1a situated at a level higher than its outlet end 1b, through which a burner 3 enters, so that the flame 4 of the burner develops in the inlet part of the drum 1 and that the hot gases coming from the burner flame circulate in the direction going from the inlet end 1a towards the outlet end 1b of the drum.
  • the drum 1 comprises in its initial part screen vanes ensuring the transport of the materials introduced into the drum, in contact with the internal wall of the drum, so as to avoid thermal degradation of the recycled materials by direct contact with the flame or under the effect of its radiation.
  • the recycled materials 8 in the form of particles are then put into circulation and lifted to inside the drum 1, thanks to lifting vanes integral with the inner wall of the drum, when this drum is rotated about its longitudinal axis.
  • a drum operating according to this principle is described in FR-A-2,441,682.
  • the recycled materials 8 circulate along the entire length of the drum 1, between its inlet end 1a and its outlet end 1b, in the same direction as the hot gases coming from the inlet area in which the flame 4 develops and are brought into contact with these gases, so that the particles 8 are dried and heated before being discharged into a device 9 ensuring the recovery of solid materials and gases at the outlet of the drum 1.
  • the drum 2 comprises an envelope of generally cylindrical shape having a longitudinal axis slightly inclined relative to the horizontal plane around which the envelope is rotatably mounted.
  • the drum 2 has a first end 2a or inlet end and a second end 2b or outlet end, the solid materials circulating inside the drum in the direction from its inlet end to its outlet end located at a level below the entry end.
  • the drum 2 comprises a burner 10 having an elongated body mounted inside a cylindrical casing 11 arranged along the axis of the drum 2.
  • the casing 11 is integral with the casing of the drum 2 with which it is rotated, the burner 10 being mounted on the fixed support structure of the drum and introduced with play through its elongated body inside of the envelope 11, so that its end opens into the drum at the end of the envelope 11 and develops a flame 12 in the interior volume of the drum.
  • the end of the casing 11 and of the burner body from which the flame 12 develops is located in an area of the drum remote from the inlet end 2a and the outlet end 2b.
  • Hot gases from the zone where the flame 12 develops circulate in the direction of the inlet end 2a of the drum and are captured at this end by a manifold 13 connected to means for treating and discharging the gases.
  • a manifold 13 connected to means for treating and discharging the gases.
  • These means include a dust collector 14 connected to the manifold 13 via a pipe 15 and a fan 16 located at the outlet of the dust collector and ensuring the suction of the gases through the dust collector and the recovery of the purified gases which are evacuated to the outlet of the fan 16 by a chimney 17 open to the atmosphere.
  • the drum 2 is supplied, at its inlet end 2a, with cold and wet aggregates, by means of a weighing conveyor 18 onto which are poured, in regulated quantities, aggregates of different particle sizes coming from dosing hoppers 19.
  • the internal surface of the casing of the drum 2 is provided with vanes for transporting and / or lifting solid materials, the shape of which varies according to the length of the drum.
  • the inner surface of the drum is lined with vanes wound in a helix allowing rapid introduction without lifting of materials into the drum.
  • the drum comprises a drying zone 21 in which the interior surface of the drum is lined with lifting vanes ensuring the lifting and the fall of the aggregates throughout the section of the drum, so as to ensure good contact between the aggregates and the hot gases circulating in the drum between the flame zone 22 in which the flame of the burner 12 develops and the end d 'entry 2a.
  • the interior surface of the drum is provided with screen vanes 25 making it possible to keep the aggregates in circulation in the drum against the interior wall of the drum casing, so as to distance them from the flame 12 and protect them from the radiation of the flame.
  • the drum 2 Following the flame zone 22, the drum 2 comprises a recycling and mixing zone 23 at the level of which the drum casing is surrounded by a recycling ring 26 allowing the introduction of recycled materials inside of the drum.
  • the casing of the drum comprises, at the level of the recycling ring 26, through openings and chutes 27 allowing the guidance and the introduction of the recycled materials introduced into the fixed ring 26, in the interior volume of the drum.
  • zone 23 the interior surface of the drum is provided with vanes allowing efficient mixing and mixing of the solid materials circulating in the drum.
  • the assembly constituted by the casing of the drum, the casing 11 of the burner and the fins 28 is rotated, the fins 28 then acting like the fins of a turbine making it possible to suck up the gases. trained in the area recycling and mixing 23, to return them to the flame zone 22.
  • the drum 2 comprises, between the zone 23 and the outlet end 2b, a kneading zone 24, at the entrance of which opens a bitumen injection lance 30 connected to a liquid bitumen tank 31, by the through a pipe 32.
  • the envelope of the drum 2 has a diameter greater than the diameter of the current part of the drum.
  • the inner surface of this diametrically enlarged part of the casing is provided with vanes ensuring lifting and falling of the solid materials throughout the drum section, so as to mix the liquid bitumen and the solid materials and to ensure a good coating of these materials.
  • the zones 23 and 24 occupy the part of the interior volume of the drum 2 located at the periphery of the casing 11 in which the body of the burner 10 is placed.
  • the transfer means 33 can be constituted, as will be explained in more detail with reference to FIGS. 3 and 4, by a simple discharge chute or by a conveyor such as a raclette conveyor.
  • a screw conveyor 35 is shown, supplied with pulverulent material, from a storage hopper 36, by means of a means Handling 37.
  • the device 35 makes it possible to introduce a pulverulent material in metered amount into the mixes during kneading. It is indeed necessary, to obtain a good quality of the mixes, to regulate the content of pulverulent material (filler) of these mixes.
  • the mixes produced in the drum 2 are poured out of the zone 24, onto a conveyor 38, such as a scraper conveyor, to be poured into a storage hopper 39.
  • the collector 9 connected to the outlet of the drying drum 1 and ensuring the recovery of the recycled materials and of the gases circulating in the drum 1 is connected to the recycling ring 26 by a pipe 40 on which is disposed a suction fan 41.
  • the gases having circulated in the drying drum 1 can thus be reintroduced into the drum 2, at the level of the zone 23, via the recycling ring and the openings and chutes passing through the casing of the drum.
  • the cold and wet recycled materials coming from the metering hoppers 7 are introduced into the drum 1 by its end 1a and held against the internal wall of the drum, in its initial part where the flame 4 develops, by screen vanes, as it has was indicated above. Recycled materials cannot therefore come into direct contact with the flame and are also protected against its radiation. This avoids thermal degradation of the bitumen covering the particles of recycled materials.
  • the recycled materials Downstream of the inlet part of the drying drum 1 in which the flame 4 develops, the recycled materials are lifted by lifting vanes and fall down throughout the drum section, so as to come into contact with the hot gases produced by the flame 4 of the burner and circulating in the same direction as the particles of recycled material 8.
  • the particles 8 of recycled materials are dried and heated, so that the particles which flow into the collector 9 no longer contain water in a significant amount and are at a temperature of the order of 100 ° C. .
  • the virgin aggregates introduced by the handling device 18 into the inlet part of the drum 2 are dried and heated in the zone 21, so that these virgin aggregates, at the exit from the zone 21, no longer contain water in significant quantity and are found at a temperature well above 100 ° C.
  • the virgin aggregates are superheated by contact with very high temperature gases coming from the flame 12 and by heat conduction through the screen vanes 25.
  • the superheated aggregates are incorporated and then mixed with the recycled materials, inside zone 23.
  • the particles 8 of recycled materials come into contact with gases coming from the flame 4 of the burner which can be at a high temperature. These gases can cause some vaporization of the bitumen covering the particles.
  • gases arriving in the manifold 9 at the outlet of the drying drum 1 are therefore likely to contain a certain proportion of hydrocarbon vapors of formula CH x formed by evaporation and thermal decomposition of the bitumen contained in the recycled materials.
  • the gases present in the zone 23 are sucked in by the turbine constituted by the fins 28 and then discharged into the flame zone 22 where the flame 12 ensures their combustion.
  • the pre-coated mixture then reaches the zone 24 at the entrance of which an addition of bitumen in regulated quantity and in divided form is ensured by the lance 30.
  • the pre-coated particles are introduced into zone 24 at an elevated temperature which makes it possible to promote coating during the mixing of these particles with the liquid bitumen in zone 24.
  • This high temperature of the pre-coated particles can be obtained without the need to overheat the virgin aggregates too much, in the measure that the recycled materials introduced into zone 23 are dry and at a temperature close to 100 ° C.
  • Pulverulent material can be added to the materials being coated in the zone 24, by the screw handling device 35.
  • the particles coated with bitumen and containing a determined proportion of pulverulent are poured onto the conveyor 38 to be transported to the storage hopper 39.
  • the device according to the invention uses only two drums, to the exclusion of any fixed mixer and of storage and metering means for supplying this fixed mixer. This therefore results in greater simplicity and lower cost of the installations.
  • FIGs 2 and 3 there is shown a device according to the invention and according to a first embodiment.
  • the corresponding elements in Figures 1 on the one hand and 2 and 3 on the other hand have the same references.
  • FIGS. 2 and 3 differs from the embodiment which has just been described with reference to FIG. 1, by the fact that the drying drum 1 and the counter-current drum 2 are arranged with their parallel axes, the drum 1 being placed vertically and above the drum 2.
  • the collector 9 placed at the outlet of the drying drum 1 is disposed directly above the recycling ring 26 of the drum 2.
  • the device 33 ensuring the transport of the dried and preheated recycled materials 8 between the collector 9 and the ring of recycling 26 consists of a simple chute 33 in which the particles 8 of recycled material flow by gravity.
  • the recycled materials 8 flow outside the drum 1 through openings provided in its wall, inside the collector 9.
  • the wall of the drum also carries pallets 44 of shape flat inside the collector 9, so as to favor the entrainment of the particles 8 of recycled materials towards the inlet of the trough 33.
  • the materials 8 flowing by gravity in the trough 33 enter the recycling ring 26 and are guided by the troughs 27 secured to the wall of the drum towards openings passing through this wall, under the effect of the rotation of the drum 2 in the direction of arrow 45.
  • the materials 8 are thus introduced into the zone 23 of the drum 2.
  • the gases arriving at the outlet of the drum 1 escape into the manifold 9 through the openings in the wall of the drum (arrows 42 in FIGS. 2 and 3) and can be introduced into the recycling ring 26 via the chute 33, these gases then entering the drum 2, at the level of the zone 23 through the openings for the passage of the particles 8 situated in the extension of the chutes 27.
  • the gases are sucked into the zone 23 and discharged into the flame zone 22 by the fins 28 fixed on the casing 11 secured to the drum and arranged around the burner 10.
  • the gases arriving in the manifold 9 can also be sucked in by a fan 41 and discharged by this fan into the recycling ring 26 which is connected to the manifold 9 by a sheath 40 on which the fan 41 is arranged.
  • FIG. 4 a second alternative embodiment of the device according to the invention is shown, the corresponding elements in FIG. 4 on the one hand and in FIGS. 1 to 3 on the other hand bearing the same references, however provided with the 'exponent ' (prime) to designate the elements shown in Figure 4.
  • the device according to the second variant shown in FIG. 4 comprises two drums 1 ′ and 2 ′ with parallel currents and against the current respectively, placed with their parallel axes and substantially at the same level.
  • the outlet collector 9 ′ of the drum 1 ′ is connected to the inlet hopper of the recycling ring 26 ′ of the drum 2 ′, by a conveyor device 33 ′ consisting of an inclined scraper conveyor comprising a box connected to its lower end to the collector 9 ′, by a chute 47 and, at its upper end, to the hopper of the recycling ring 26 ′ by a chute 48.
  • the dried and preheated recycled materials 8 flow into the collector 9 ′ through 1 ′ drum shell openings. These materials are then poured into the chute 47 and into the lower part of the housing of the raclette conveyor.
  • the scraper conveyor ensures the transfer of the recycled materials 8, to the upper part of the box where these materials flow into the chute 48 and into the recycling ring 26 ′.
  • Pallets 44 ′ fixed on the casing of the drum 1 ′ ensure satisfactory discharge of the materials 8 into the chute 47.
  • the gases arriving at the outlet of the drum 1 ′ are liable to escape into the manifold 9 ′ through the openings in the envelope. These gases are sucked into the recycling and mixing zone of the drum 2 ′, via the chute 47, the casing of the raclette conveyor 33 ′, the chute 48 and the recycling ring 26 ′.
  • These gases can also be introduced into the ring 26 ′ by a sheath 40 ′ joining the collector 9 ′ and the recycling ring 26 ′ on which a fan 41 ′ is placed.
  • the fins 28 ′ integral with the casing placed around the body of the burner ensure the suction of the gases into the recycling and mixing zone and the discharge of these gases into the flame zone, under the effect of the rotation of the drum 2 ′.
  • FIGS. 1 and 5 bear the same references, however assigned the second index ( ⁇ ) as regards the elements represented in FIG. 5.
  • the elements of the device of FIG. 5 similar to elements of the device of FIG. 1 will not be the subject of a particular description, since it will suffice to refer to the preceding passage of the description relating to FIG. 1.
  • the gases recovered at the outlet of the drum 1 ⁇ in the manifold 9 ⁇ are not introduced into the drum 2 ⁇ , at the level of the recycling ring 26 ⁇ but in the burner 10 ⁇ , so as to penetrate inside the drum up to the flame zone 22 ⁇ , through the annular space comprised between the body of the burner 10a ⁇ secured to the fixed part of the drum 2 ⁇ and the envelope 11 ⁇ secured to the rotating part of the drum.
  • the recovered gases are injected into the burner 10 ⁇ via the line 40 ⁇ on which a fan 41 ⁇ is placed.
  • the device according to the invention makes it possible to produce bituminous coated materials from solid materials containing a large proportion of recycled materials, whatever the moisture content of the recycled starting materials.
  • the device according to the invention applies generally, in all cases where bituminous coated products are made from recycled bituminous materials, virgin aggregates and liquid bitumen.

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Claims (12)

  1. Vorrichtung zum Aufbereiten von bituminösem Mischgut aus recycelten bituminösen Materialien, Roh-Zuschlagstoffen und flüssigem Bitumen, mit: einem Parallelströmungstrommeltrockner (1, 1′, 1˝) mit einem Einlaßende (1a), dem recycelte Materialien zugeführt werden, und einem Auslaßende (Ib) für getrocknete und erhitzte recycelte Materialien, einem Gegenströmungstrommeltrockner und -rührer (2, 2′, 2˝) mit einem Einlaßende (2a), dem kalte Roh-Zuschlagstoffe zugeführt werden, und mit einem länglichen Brenner (10, 10˝), der sich über das Auslaßende (2b) in die Trommel (2, 2′, 2˝) erstreckt und in einer von den Enden der Trommel (2, 2′, 2˝) entfernten Flammenzone endet, einem Ring (26, 26′, 26˝) zum Einbringen von Materialien in die Trommel (2, 2′, 2˝) über deren Seitenwand und einer Rührzone (24), in der eine Bitumeneinspritzvorrichtung (30, 30′) endet, die um den Körper des Brenners (10, 10˝) in einem dem Auslaßende (2b) benachbarten Teil des Endes der Trommel (2, 2′, 2˝), das dem Ende (2a) gegenüberliegt, über welches die Roh-Zuschlagstoffe eingebracht werden, angeordnet ist, dadurch gekennzeichnet, daß das Auslaßende (Ib) der Parallelströmungstrommel (1, 1′, 1˝), durch welches die getrockneten und erwärmten recycelten Materialien austreten, mit dem Einbringring (26, 26′, 26˝) durch eine Materialverbringungseinrichtung (33, 33′, 33˝) verbunden ist, wobei der Ring (26, 26′, 26˝) zum Einbringen recycelter Materialien in einer Recycling- und Mischzone (23) für die recycelten Materialien und die überhitzten Roh-Zuschlagstoffe mündet, die in der Gegenströmungstrommel (2, 2′, 2˝) um den Körper des Brenners (10, 10˝) zwischen der Flammenzone (22, 22˝) und dem Rührbereich (24) angeordnet ist.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß sie Einrichtungen (40, 40′, 41, 41′) zur Rückgewinnung heißer Gase am Ausgang des Parallelströmungstrommeltrockners (1, 1′) und zum Leiten dieser heißen Gase über den Einbringring (26, 26′) in die Recycling- und Mischzone (23) der Gegenströmungstrommel (2, 2′) aufweist.
  3. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß die Einrichtungen zur Rückgewinnung heißer Gase und zum Leiten der heißen Gase aus einer Leitung (40, 40′) bestehen, die einen Kollektor (9) zur Rückgewinnung von Gasen am Ausgang der Parallelströmungstrommel (1, 1′) und den Recyclingring (26, 26′) der Gegenströmungstrommel (2, 2′) verbindet, wobei in der Leitung ein Gebläse (41, 41′) angeordnet ist, das ein Ansaugen der Gase in dem Kollektor (9, 9′) am Ausgang (1b) der Parallelströmungstrommel (1, 1′) und ihre Rückführung in den Recyclingring (26, 26′) der Gegenströmungstrommel (2, 2′) ermöglicht.
  4. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß sie Einrichtungen (40˝, 41˝) zur Rückgewinnung heißer Gase am Ausgang des Parallelströmungstrommeltrockners (1˝) und zum Leiten dieser heißen Gase über den Brenner (10˝) der Trommel (2˝) in die Flammenzone (22˝) der Trommel (2˝) aufweist.
  5. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß die Einrichtungen zur Rückgewinnung heißer Gase und zum Leiten von heißen Gasen aus einer Leitung (40˝) bestehen, die einen Gasrückgewinnungskollektor (9˝) am Ausgang der Parallelströmungstrommel (1˝) und den Brenner (10˝) verbindet, wobei in der Leitung ein Gebläse (41˝) angeordnet ist, das ein Ansaugen der Gase in dem Kollektor (9˝) am Ausgang (Ib) der Trommel (1˝) und ihre Rückführung in einen zwischen dem Körper (10′a) des Brenners und einem zu dem Körper (10′a) des Brenners koaxialen Mantel (11˝) vorgesehenen Ringraum ermöglicht, der in die Flammenzone (22˝) mündet.
  6. Vorrichtung nach einem der Ansprüche 1-5, dadurch gekennzeichnet, daß die Trommel (1, 1˝) und die Trommel (2, 2˝, die im wesentlichen zylindrisch sind, derart zueinander vertikal angeordnet sind, daß ihre Längsachsen in bezug zur Horizontalebene geringfügige Winkel bilden, wobei das Auslaßende (Ib) der oberhalb der Gegenströmungstrommel (2, 2˝) angeordneten Parallelströmungstrommel (1, 1˝) in einen Kollektor (9, 9˝) mündet, der senkrecht zum Recyclingring (26, 26˝) der Gegenströmungstrommel (2, 2˝) angeordnet und mit dem Recyclingring (26, 26˝) durch eine Rinne (33, 33˝) verbunden ist, die die Einrichtung zum Überführen der aus der Parallelströmungstrommel (1, 1˝) austretenden recycelten Zuschlagstoffe in den Recyclingring (26, 26˝) bildet.
  7. Vorrichtung nach einem der Ansprüche 1-5, dadurch gekennzeichnet, daß die Einrichtung (33, 33′) zum Überführen der recycelten Materialien zwischen dem Auslaß der Parallelströmungstrommel (1, 1′) und dem Recyclingring (26, 26′) der Gegenströmungstrommel (2′) aus einem Förderer, zum Beispiel einem Kratzbandförderer mit einem in bezug zur Horizontalebene geneigten Kasten, besteht, dessen unteres Ende mit einem Kollektor (9, 9′) verbunden ist, in den das Auslaßende (1b) der Parallelströmungstrommel (1, 1′) mündet, und dessen oberes Ende über einen Trichter mit dem Recyclingring (26, 26′) der Gegenströmungstrommel (2, 2′) verbunden ist.
  8. Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, daß die am Ausgang der Parallelströmungstrommel (1, 1˝) rückgewonnen Gase wenigstens teilweise mittels der Rinne (33, 33˝) an den Recyclingring (26, 26˝) der Gegenströmungstrommel (2, 2˝) gelangen.
  9. Vorrichtung nach Anspruch 7, dadurch gekennzeichnet, daß die am Ausgang der Parallelströmungstrommel (1, 1′) rückgewonnen Gase wenigstens teilweise mittels des Kastens des Förderers (33′) an den Recyclingring (26, 26′) gelangen.
  10. Vorrichtung nach einem der Ansprüche 1-9, dadurch gekennzeichnet, daß der längliche Körper des Brenners (10, 10˝) über seine gesamte Länge im Inneren eines rohrförmigen Mantels (11, 11˝) angeordnet ist, wobei der Mantel (11, 11˝) einstückig mit dem Mantel der Gegenströmungstrommel (2, 2˝) ist und an einem in die Flammenzone (22, 22˝) der Trommel mündenden Ende in in bezug zur Trommel radialen Richtungen angeordnete Flügel (28) aufweist, die zwischen dem Mantel (11, 11˝) des Brenners und dem Mantel der Trommel (2, 2˝) vorgesehen und in bezug zur Achse der Trommel geneigt sind, derart, daß eine Turbine zum Ansaugen der Gase in die Recycling- und Mischzone (23) und zum Weiterleiten dieser Gase in die Flammenzone (22, 22˝) gebildet ist.
  11. Verfahren zum Aufbereiten von bituminösem Mischgut aus recycelten bituminösen Materialien, Roh-Zuschlagstoffen und flüssigem Bitumen, mit den Schritten des kontinuierlichen Trocknens und Erwärmens der recycelten Materialien in einem Parallelströmungstrommeltrockner (1, 1′, 1˝), in dem die recycelten Materialien (8) in der selben Richtung zirkulieren wie ein heißer Gasstrom, des kontinuierlichen Trocknens und Erwärmens der Roh-Zuschlagstoffe in einer zweiten Trommel (2, 2′, 2˝), in der die Roh-Zuschlagstoffe zu dem heißen Gas gegenläufig zirkulieren, des Verrührens der Roh-Zuschlagstoffe und der getrockneten und erwärmten recycelten Materialien und des Mischens derselben mit flüssigem Bitumen, dadurch gekennzeichnet, daß die getrockneten und erwärmten recycelten Materialien in der ersten Trommel (1, 1′, 1˝) kontinuierlich in eine Recycling- und Mischzone (23) der zweiten Trommel (2, 2′, 2˝) zugeführt werden, in die die getrockneten und erwärmten Roh-Zuschlagstoffe gelangen, und daß das flüssige Bitumen in die Mischung aus recycelten Materialien und Roh-Zuschlagstoffen einbezogen wird, und daß das Verrühren in einer Zone (24) der zweiten Trommel (2, 2′, 2˝) erfolgt, die der Rezyklirungs- und Mischzone (23) in Richtung der Zirkulation der Zuschlagstoffe nachfolgt, wobei die Recycling- und Mischzone (23) und die Rührzone (24) von in der zweiten Trommel (2, 2′, 2˝) zirkulierenden heißen Gasen isoliert sind.
  12. Verfahren nach Anspruch 11, dadurch gekennzeichnet, daß die am Auslaß der ersten Trommel rückgewonnenen und in Kontakt mit den recycelten Zuschlagstoffen (8) zirkuliert habenden heißen Gase in die zweite Trommel (2, 2′, 2˝) eingeleitet werden, derart, daß diese Gase in Kontakt mit der Flamme der zweiten Trommel (2, 2′, 2˝) gebracht und entzündet werden.
EP90403447A 1990-01-18 1990-12-04 Vorrichtung zur Aufbereitung von bituminösem Mischgut mit einer Gleichstrom- und einer Gegenstromtrommel und entsprechendes Verfahren Expired - Lifetime EP0437990B1 (de)

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FR9000569A FR2657097B1 (fr) 1990-01-18 1990-01-18 Dispositif de preparation de produits enrobes bitumineux comportant un tambour a courants paralleles et un tambour a contre-courant et procede correspondant.
FR9000569 1990-01-18

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Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5735223A (en) * 1995-01-11 1998-04-07 Amon; Thomas R. Method for disposing of paper in an asphalt plant
US5967065A (en) * 1995-01-11 1999-10-19 Amon; Thomas R. Method for disposing of paper in an asphalt plant
US5520124A (en) * 1995-01-11 1996-05-28 Amon; Thomas R. Method for disposing of paper in an asphalt plant
DK1022391T3 (da) * 1999-01-11 2004-06-28 Heijmans Infrastructuur Bv Fremgangsmåde til genanvendelse af tjære-og/eller bitumenholdigt materiale, som omfatter asfaltaggregat, ved termisk omsætning i kombination med fremstillingen af asfalt
US7566162B1 (en) * 2006-03-07 2009-07-28 Astec, Inc. Apparatus and method for a hot mix asphalt plant using a high percentage of recycled asphalt products
FR2989393B1 (fr) * 2012-04-13 2014-06-06 Argumat Dispositif de fabrication de produits enrobes a chaud a sortie derivee et malaxeur externe et procede de fabrication d'enrobes a chaud correspondants
CN103541303B (zh) * 2013-11-05 2016-03-23 无锡锡通工程机械有限公司 连续式沥青再生料热风循环升温设备
FR3051203B1 (fr) * 2016-05-10 2019-09-06 Ermont Installation et procede d'enrobage de granulats
FR3067371B1 (fr) * 2017-06-09 2021-11-26 Ermont Installation et procede de production d'enrobes

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3809373A (en) * 1972-03-10 1974-05-07 Cmi Corp Asphalt preparation plant
US4142803A (en) * 1976-10-05 1979-03-06 Mendenhall Robert Lamar Recycled asphalt-aggregate process and apparatus
FR2441682A1 (fr) * 1978-11-17 1980-06-13 Creusot Loire Dispositif pour la preparation de produits enrobes bitumineux pour revetements routiers
US4481039A (en) * 1981-08-17 1984-11-06 Mendenhall Robert Lamar Method for recycling asphaltic concrete
US4555182A (en) * 1981-08-17 1985-11-26 Mendenhall Robert Lamar Apparatus and method for recycling asphaltic concrete
CA1231707A (en) * 1982-12-02 1988-01-19 Wilhelm P.H. Voors Method and plant for recycling asphalt using hot aggregate confluence
US4715720A (en) * 1984-11-05 1987-12-29 Astec Industries, Inc. Drum mix asphalt plant with knock-out box and separate pugmill coater
DE3441382A1 (de) * 1984-11-13 1986-05-22 Deutsche Asphalt Gmbh, 6000 Frankfurt Verfahren und vorrichtung zum aufbereiten von asphalt
US4626198A (en) * 1985-09-20 1986-12-02 Fuller Company Method and apparatus for producing dead burnt materials
DE3540978A1 (de) * 1985-09-21 1987-03-26 Wibau Ag Verfahren zur emissionsarmen aufbereitung eines bituminoesen mischgutes mit hohem asphaltgranulatanteil als recycling-mischgut
FR2632670A1 (fr) * 1988-06-13 1989-12-15 Ermont Cm Dispositif de preparation de produits enrobes bitumineux a malaxeur fixe
US4910540A (en) * 1989-05-12 1990-03-20 Cmi Corporation Countercurrent asphalt drum dryer/mixer

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DE69001126T2 (de) 1993-07-08
FR2657097B1 (fr) 1992-05-15
US5178456A (en) 1993-01-12
DE69001126D1 (de) 1993-04-22
FR2657097A1 (fr) 1991-07-19
EP0437990A1 (de) 1991-07-24

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