EP3296462B1 - Installation et procédé de fabrication d'asphalte - Google Patents

Installation et procédé de fabrication d'asphalte Download PDF

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Publication number
EP3296462B1
EP3296462B1 EP17181252.2A EP17181252A EP3296462B1 EP 3296462 B1 EP3296462 B1 EP 3296462B1 EP 17181252 A EP17181252 A EP 17181252A EP 3296462 B1 EP3296462 B1 EP 3296462B1
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EP
European Patent Office
Prior art keywords
drying drum
white mineral
exhaust gas
exhaust
installation according
Prior art date
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Active
Application number
EP17181252.2A
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German (de)
English (en)
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EP3296462A1 (fr
Inventor
Frank Wagner
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.)
Benninghoven Zweigniederlassung Der Wirtgen Mineral Technologies GmbH
Original Assignee
Benninghoven GmbH and Co KG
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Application filed by Benninghoven GmbH and Co KG filed Critical Benninghoven GmbH and Co KG
Priority to PL17181252T priority Critical patent/PL3296462T3/pl
Publication of EP3296462A1 publication Critical patent/EP3296462A1/fr
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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
    • E01C19/1031—Mixing in a rotary receptacle the mixture being discharged continuously
    • 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
    • E01C2019/1095—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 plant and a method for producing asphalt.
  • dry drums are used for the heating of used asphalt granulate, which are operated in direct current.
  • Such a drying drum is known from DE 36 24 735 A1
  • Other plants for asphalt production are known from US 5,174,650 .
  • Direct current means that the material to be heated and the heat are supplied in the same direction along the axis of rotation of the drying drum.
  • the Altasphaltmaterial has a temperature of about 130 ° C.
  • Exhaust gas generated by a burner as a heat source and supplied to the drying drum has a temperature of about 150 ° C.
  • a target temperature of the Altasphaltmaterials of about 160 ° C is desired.
  • An increase in the temperature level deteriorates the economy of performing the heating of the scrap asphalt granules.
  • heat losses increase as a result of radiation in the fourth power of the temperature.
  • the efficiency of the process at elevated temperature is significantly reduced.
  • An increase in the temperatures also leads to an additional increase in pollutant levels in the exhaust gas, in particular the proportion of unburned hydrocarbons (C ges ), in particular carbon monoxide (CO) and carbon dioxide (CO 2 ).
  • C ges unburned hydrocarbons
  • CO carbon monoxide
  • CO 2 carbon dioxide
  • increased exhaust gas temperatures could cause auto-ignition of the fine particles in a dedusting unit.
  • the invention has for its object to improve the production of asphalt, so that in particular reduces pollutant levels in the exhaust and the production is uncomplicated possible.
  • the essence of the invention is that exhaust gas is fed to a white mineral drying drum for heating white mineral and is burned there.
  • the exhaust gas is introduced guided in the white mineral drying drum.
  • the combustion of pollutants in the exhaust gas in the white mineral drying drum is effective.
  • the pollutant components in the exhaust gas are reduced.
  • the proportion of hydrocarbons C ges is reduced because they are burned in the white mineral drying drum.
  • the system has a flow-guiding unit with a lamella recuperator and improves the targeted burning of pollutant components in the exhaust gas and / or secondary exhaust gas.
  • the lamella recuperator has lamellar baffles which form an outer shell for the helical flow movement of the exhaust gases and / or the secondary exhaust gases.
  • the lamella recuperator prevents pollutant components in the exhaust gas and / or in the secondary exhaust gas from being thrown out uncontrollably due to the centrifugal force of the swirling flow.
  • a plant according to claim 2 enables used asphalt material to be heated in a dc drying drum, exhaust gas being exhausted from the dc drying drum by means of a suction device, the white mineral drying drum for heating the white mineral is fed and burned there. The combustion of pollutants in the exhaust gas from the DC drying drum in the white mineral drying drum is effective.
  • An exhaust hood according to claim 3 enables improved exhaust of the exhaust gases from the DC drying drum.
  • An exhaust fan of the exhaust improves the exhaust of the exhaust gases from the DC drying drum and in particular from the exhaust hood in the white mineral drying drum.
  • the exhaust fan is arranged in particular along an exhaust pipe, in particular between the exhaust hood and the white mineral drying drum.
  • a secondary exhaust gas line according to claim 4 allows the supply of secondary exhaust gases, which may be incurred in the system, for example, from a suction of a mixer or from a Verladesilo, in particular a Mischgutverladesilo. The total amount of pollutants in the exhaust gas is additionally reduced.
  • a burner according to claim 5 allows an uncomplicated and immediate heating of the white mineral.
  • the combustion of the exhaust gases in the white mineral drying drum is improved.
  • a swirl chamber according to claim 6 allows a swirl-shaped feeding of the exhaust gases and / or the secondary exhaust gases in the white mineral drying drum.
  • Swirling means that the exhaust gases and / or subsidiary exhaust gases are fed eccentrically to the longitudinal axis of the white mineral drying drum.
  • the exhaust gases and / or secondary exhaust gases are not supplied directly to the burner flame.
  • the swirl-shaped feeding the exhaust gases and / or the secondary exhaust gases are introduced substantially along a helical line about the longitudinal axis of the white mineral drying drum.
  • the exhaust gases and / or the subsidiary exhaust gases flow around the burner flame along a helical flow.
  • the design of the lamellar recuperator according to claim 7 ensures that the pollutant components in the exhaust gas and / or in the secondary exhaust gas are combusted in a controlled manner.
  • the helical flow of the exhaust gas and the subsidiary exhaust gas may expand around the burner flame.
  • An immediate burning of pollutant levels after feeding into the white mineral drying drum is prevented.
  • cooling of the flame core is prevented.
  • the pollutant components in the exhaust gas and / or in the secondary exhaust gas are heated within the expansion section, in particular as a result of the radiant heat of the lamella recuperator and, in particular, ignitable.
  • the ignitable pollutants are fed to the burner flame tip and burnt there.
  • a cylinder portion disposed along a longitudinal axis of the white mineral drying drum between the expanding portion and the taper portion enables a Targeted heating of the pollutant components in the exhaust gas and / or in the secondary exhaust gas.
  • the pollutant components can be converted into the vapor form, whereby their combustion is improved.
  • An embodiment of the lamella recuperator according to claim 8 ensures a reliable discharge of rock material, in particular of Altasphaltgranulat from the burner chamber out.
  • a plurality of tapering sections are provided, which are arranged in particular concentrically with one another and behind one another along the longitudinal axis.
  • the lamellar recuperator is designed in particular funnel-shaped.
  • the successively arranged tapering sections are arranged spaced apart along the longitudinal axis in such a way that a substantially annular end face gap is formed, which faces the burner flame. Through this annular face gap, the rock material can escape from the combustion chamber.
  • a flame tube according to claim 9 is arranged in particular in the front region of the burner flame and protects the flame from undesired cooling. The burning process is thereby ensured. Another positive effect results from the fact that the flame tube is heated by the radiant heat of the burner flame and has a very high surface temperature. This heat can be delivered to the recuperator. As a result, the recuperator air is heated in such a way that pollutant components contained therein evaporate and / or become flammable.
  • a heat / protection element protects the lintel zone located in the white mineral drying drum along the longitudinal axis behind the flow guide unit from flame penetration.
  • the heat / protection element is in particular a cylindrical plate, in particular in the form of a baffle, executed.
  • the baffle is oriented in particular perpendicular to the longitudinal axis. Via the baffle wall, the heat can be transferred evenly and in particular over a large area into the white mineral drying drum.
  • a dynamic pressure which leads at least partially to a forced flow of the recuperator through the burner flame.
  • pollutants are burned in the recuperator to a greater extent with. This reduces the pollutant emissions and increases the heat yield.
  • a dedusting according to claim 11 allows the reduction of the residual components of pollutants in the exhaust gas.
  • the plant 1 comprises a DC drying drum 2 for heating the Altasphaltmaterials.
  • the DC drying drum 2 is rotatable about a first rotation axis 3.
  • Right side 4 of the DC drying drum 2 shown on the right is provided with a material inlet 5 for the supply of used asphalt material.
  • the Altasphaltmaterial passes through the DC drying drum 2 along a material conveying direction 6, which is directed from the end face 4 in the interior of the DC drying drum 2 and is oriented in particular parallel to the first axis of rotation 3.
  • a first heat source in the form of a burner 7 is arranged on the front side 4.
  • heat is supplied directly to the DC drying drum 2.
  • the heat is conducted along a heat-conveying direction 8 through the DC drying drum 2.
  • the heat-conveying direction 8 is oriented parallel to and in the same direction as the material conveying direction 6.
  • the DC drying drum 2 is operated in the DC method.
  • a suction hood 9 On one of the front side 4 opposite end face to the DC drying drum 2, a suction hood 9 is connected.
  • a suction hood 9 On one of the front side 4 opposite end face to the DC drying drum 2, a suction hood 9 is connected.
  • Such a suction hood 9, their details and operation are from the German patent application DE 10 2015 217 845.5 known, to which reference is hereby made.
  • the suction hood 9 has an integrated particle separation unit in order to be able to deposit dust particles which have a particle size of at most 100 ⁇ m, in particular not more than 63 ⁇ m and in particular not more than 20 ⁇ m.
  • a collection container 10 for collecting fine particles is arranged in particular below the suction hood 9.
  • the suction hood 9 has a substantially cylindrical housing 29, wherein a housing longitudinal axis 30 is oriented substantially perpendicular to the axis of rotation 3 of the DC drying drum 2.
  • the housing longitudinal axis 30 is oriented substantially vertically.
  • a collecting container 10 is arranged for fine particles.
  • the collecting container 10 is conical in order to improve a collecting action and in particular a discharge of the fine particles from the collecting container 10.
  • a conveying device On a side facing away from the housing 29 underside of the collecting container 10, a conveying device may be arranged with a screw conveyor.
  • the conveying device serves to convey material collected in the collecting container 18.
  • the conveyor device may further comprise a conveyor belt, which with the material from the collecting container 10 via the screw conveyor is acted upon.
  • the conveyor may alternatively or in addition to the conveyor belt have a trough screw.
  • the housing 29 of the suction hood 9 has an inflow opening. Particulate gas from the DC drying drum 2 can flow into the housing 29 via the inflow opening.
  • the inflow opening is arranged in the outer cylinder jacket wall of the housing 29.
  • the inflow opening is oriented substantially perpendicular to the axis of rotation 3.
  • the inflow opening is oriented substantially vertically.
  • the housing 29 has an outlet opening, to which a suction line 11 is connected.
  • the discharge opening is arranged above the inflow opening.
  • the inflow opening connects the outflow opening via a flow channel, which is formed by the housing 29 of the suction hood 9.
  • the housing 29 has an inner diameter D A , which defines a flow cross-sectional area of the flow channel.
  • the flow channel is part of a flow-influencing unit, which is made passive.
  • the flow-influencing unit is a particle-separating unit.
  • the flow influencing unit comprises a flow guide, which is not shown in detail.
  • the flow-guiding element is arranged in particular in the region of the inflow opening and designed as a pivotable about a pivot axis 30 flap.
  • the flow influencing unit may have a stop element on which the flow guide can rest when no or too low an exhaust gas flow from the DC drying drum 2 is present in the suction hood 9.
  • the stop element is arranged in particular vertically below the axis of rotation, so that the flow-guiding element is oriented vertically downwards in a non-actuated state.
  • the flap is arranged such that a projection of the flap is arranged perpendicular to the inflow opening within the inflow opening. Illustratively, the flap protrudes into the inflow cross-section formed by the inflow opening.
  • a suction line 11 is connected, which connects the suction hood 9 with a white mineral drying drum 12.
  • an exhaust fan 13 is arranged to suck exhaust gas from the suction hood 9.
  • a secondary exhaust gas line 14 via which a Fineabgaser Weger 15, in particular in Mischgutverladesilo and / or a mixer to the suction line 11 are connected.
  • the suction hood 9, the suction line 11 and the exhaust fan 13 form a suction device, which may optionally include the secondary exhaust gas line 14.
  • the white mineral drying drum 12 is rotatable about a second axis of rotation 16. Concentric with the second axis of rotation 16, a second heat source in the form of a second burner 17 on the end face 18 of the white mineral drying drum 12 is arranged. On one of the end faces 18 opposite end face is a white mineral inlet 19 for the supply of white mineral provided in the white mineral drying drum 12.
  • the white mineral drying drum 12 is operated countercurrently, wherein a white mineral conveying direction is directed parallel but opposite to the heat conveying direction along the second axis of rotation 16.
  • a material outlet 31 is provided for the heated white mineral.
  • a flow-guiding unit 20 which comprises a swirl chamber 21 and a lamella recuperator 22, is arranged on the white-mineral drying drum 12.
  • the swirl chamber 21 By means of the swirl chamber 21, the flow of the exhaust gases from the suction hood 9 and the secondary exhaust gases from the Mauabgaser Wegern 15 eccentrically with respect to the second axis of rotation 16 of the white mineral drying drum 12 and fed into the white mineral drying drum 12.
  • the exhaust gases and secondary exhaust gases follow a helical flow around the second axis of rotation 16 and thus around the flame of the second burner 17.
  • the lamella recuperator 22 serves to guide the exhaust gas flow within the white mineral drying drum 12.
  • the lamella recuperator 22 has along the second axis of rotation 16 to a length which substantially corresponds to a length of the burner flame 26 of the second burner 17.
  • the lamella recuperator 22 has an expansion section 23, a cylinder section 24 and a taper section 25 along the second rotation axis 16.
  • the expansion section 23 is connected directly to the swirl chamber 21.
  • the taper portion 25 is disposed away from the swirl chamber 21.
  • the cylinder portion 24 is the Rotary axis 16 between the expansion portion 23 and the taper portion 25 is arranged.
  • the expansion portion 23, the cylinder portion 24 and the taper portion 25 are concentrically arranged with respect to the second rotation axis 16.
  • the widening section 23, the cylinder section 24 and the taper section 25 each have a plurality, in particular eight, individual fins 32, which are arranged overlapping at least in regions in the circumferential direction of the second fulcrum 16.
  • a radial overlap region 33 results between two adjacent lamellae 32.
  • Each overlap region 33 comprises an overlap opening 34, which has a surface normal, which is oriented tangentially to a circular line about the rotation axis 3.
  • the respective overlap region 33 extends along the respective length of the expansion section 23, the cylinder section 24 and the taper section 25.
  • the overlap region 33 extends over approximately 5 % to 10% of a circumferential length 33 of a single fin.
  • the overlap opening 34 is oriented such that during operation of the white mineral drying drum 12 material that has inadvertently entered the interior of the lamella recuperator 22, automatically, in particular due to gravity, is discharged from the lamella recuperator 22 through the overlap opening 34 again.
  • Each blade 32 is fixedly connected via two brackets 36 with the rotary kiln 2.
  • the brackets 36 are made substantially identical.
  • the brackets 36 are spaced along the second axis of rotation 16 to each other.
  • the brackets 36 ensure that each one Slat 32 rotationally fixed with respect to the second axis of rotation 16 is connected to the white mineral drying drum 12.
  • the fins 32 are not directly connected to each other.
  • the mounting of the slats 32 takes place exclusively via the holders 36 on the white mineral drying drum 12.
  • the holders 36 are designed such that an arrangement of the slats 32 relative to the white mineral drying drum 12 is variably possible. In particular, the holders 36 serve to change the opening angle of the funnel.
  • the brackets 36 are height adjustable.
  • the individual fins 32 may have a curvature, which from the representations Fig. 1 and 2 does not emerge.
  • the lamella 32 extends linearly, so that the funnel of the lamella recuperator 22 has a conical, in particular a frusto-conical shape.
  • the lamellae are conically widening with respect to the axis of rotation 16, ie in the form of a truncated cone section.
  • the cross-sectional area in the widening section 23 is designed to widen conically.
  • a widening angle, with which the lamellae are arranged conically widening within the widening section 23 relative to the second axis of rotation 16, is approximately 15 ° in accordance with the exemplary embodiment shown.
  • the expansion angle can be in particular between 5 ° and 45 °.
  • the slats are arranged substantially parallel to the second axis of rotation 16.
  • the cross-sectional area of the Lamella recuperator 22 is substantially constant along the cylinder portion 24.
  • the fins of the Lamellenrekuperators 22 are conically tapered.
  • the cross-sectional area of the lamella recuperator 22 tapers.
  • a taper angle, with which the lamellae are arranged inclined relative to the second axis of rotation, is approximately -15 ° according to the embodiment shown.
  • the taper angle may be, for example, between -5 ° and -45 °.
  • the expansion angle and the taper angle are substantially identical in magnitude.
  • the design, in particular the dimensioning of the expansion section 23, the cylinder section 24 and the taper section 25 depend essentially on the geometry of the open burner flame 26 of the second burner 17. It is essential that the exhaust gases supplied via the swirl chamber 21 can move around the burner flame 26 in their helical flow, so that the exhaust gases when leaving the lamella recuperator 22 are supplied to the burner flame 26, in particular the burner flame tip.
  • the white mineral drying drum 12 is a dedusting unit 27 downstream with chimney 28. About the chimney 28 purified exhaust gases are released to the environment.
  • Appendix 1 The function of Appendix 1 is explained below.
  • the DC drying drum 2 5 supplied Altasphaltmaterial is heated and dried via the material feed.
  • particles, in particular dust, are deposited and collected in the collecting container 10.
  • Particles containing gas from the DC drying drum 2 passes through the inflow opening in the suction hood 9.
  • the flow cross-sectional area of the suction hood 9 is chosen so large that results in a flow velocity of the inflowing gas, which is smaller than 2 m / s according to the embodiment shown. Due to the reduced flow rate and in particular the fact that the gas flowing up flows from the inflow opening to at least the outflow opening, particles in the gas are automatically separated from the gas flow by gravity and collected in the collection container 10. The discharged from the suction hood 9 air is prepurified.
  • the flow guide causes an additional improved particle deposition.
  • An exhaust gas flow from the DC drying drum 2 can not flow unhindered through the inflow opening into the suction hood 9 due to the flow guide.
  • the essentially horizontally flowing exhaust gas has to flow around the flow guide element and is thereby accelerated downwards to the collecting container 10, at least in regions. By accelerating downwards, the exhaust gas flow in this area can be up to about 6 m / s. Subsequently, the exhaust gas flow changes its direction towards the discharge opening. Due to the comparatively strong acceleration in the region of the flow guide element and the deflection of the flow, in particular heavy particles are separated from the material flow. Subsequently, the exhaust gas flow increases with the reduced flow rate of about 2 m / s to the discharge opening.
  • Exhaust gas from the suction hood 9 is sucked via the suction line 11 together with secondary exhaust gas from a Mauabgaser Weger 15 by means of the exhaust fan 13 and the swirl chamber 21 of the flow guide unit 20 is supplied.
  • the swirl chamber 21 By means of the swirl chamber 21, the exhaust gases and secondary exhaust gases are displaced in a helical flow around the burner flame 26 around. Due to the centrifugal force of the swirling flow of the exhaust gases pollutant components of the rotation axis 16 and the burner flame 26 are thrown radially outward. It is prevented that the exhaust gases and in particular the pollutant components contained therein are supplied directly to the burner flame 26, which would cause a cooling of the flame core and incomplete combustion.
  • the lamellae of the lamella recuperator 22 prevent the exhaust gases and in particular the pollutant components contained therein from being unintentionally spun far outward, that is to say radially relative to the second axis of rotation 16.
  • the lamellae of the lamella recuperator 22 in particular prevent the exhaust gases to be heated from coming into contact with the pollutant constituents with the white mineral which is heated in the white mineral drying drum 12.
  • exhaust gases and secondary exhaust gases in the cylinder section 24 are conducted around the burner flame 26.
  • the exhaust gases and in particular the pollutant components contained therein, in particular hydrocarbons C ges are heated by the radiant heat of the lamella recuperator.
  • the exhaust gases and secondary exhaust gases are conically tapered to the second axis of rotation 16 and the burner flame 26 is fed closer.
  • the exhaust gases and pollutant components are additionally heated.
  • the pollutant components in the exhaust gas are characterized in particular vaporous and ignitable.
  • the pollutants can be fed to the burner flame tip and burned there substantially pollutant-free.
  • the cleaned exhaust gases from the white mineral drying drum 12 are fed to the dedusting 27, filtered and discharged through the chimney 28 to the environment.
  • the condition is created that all pollutant components can be burned in the exhaust gas.
  • the pollutant emissions are reduced.
  • a particular advantage of the system 1 is also that a hot gas generator can be placed directly in front of the white mineral drying drum 12.
  • FIG. 3 A second embodiment of the invention described. Structurally identical parts are given the same reference numerals as in the first embodiment, to the description of which reference is hereby made. Structurally different but functionally similar parts receive the same reference numerals with a following a.
  • the lamella recuperator 22a has several along the second axis of rotation 16 one behind the other arranged taper portions 25 has.
  • the tapering portions 25 are made substantially identical, with the smaller outlet opening of the in Fig. 3 Rejuvenation portion 25 shown on the left along the second axis of rotation 16 in the larger receiving opening of the in Fig. 3 right illustrated rear taper portion 25 opens, in particular protrudes.
  • the flame tube 41 is designed as a cylinder tube and is arranged in a front flame region of the second burner 17.
  • the flame tube 41 is made of a highly heat-resistant material, in particular of a heat-resistant metal material, in particular of a heat-resistant stainless steel alloy, which is available for example under the trade name Sicromal. These are high-alloy chromium steels, for example with the material numbers 1.4713, 1.4724, 1.4742, 1.4749, 1.4762, 1.4878, 1.4828, 1.4821, 1.4841 or 1.4864.
  • the flame tube 41 protects the burner flame 26 from undesired cooling.
  • the surface of the flame tube 41 is through the burner flame 26 heated so that recuperation, which is supplied via the swirl chamber 21 frontally of the white mineral drying drum 12 a, is heated. Pollutant components of the recuperation air evaporate and become flammable.
  • the flame tube 41 is fastened to a holding tube 43 via a holding device with a plurality of holding elements 42.
  • the holding tube 43 and the flame tube 41 are arranged in particular concentrically to the axis of rotation 16.
  • the holding tube 43 has a larger diameter than the flame tube 41.
  • the holding elements 42 are arranged in particular spaced apart from one another along the axis of rotation 16.
  • the holding elements 42 are arranged in particular parallel to one another.
  • the holding elements 42 are designed for example as annular discs.
  • the holding elements 42 may, for example, also be embodied as radial webs and / or circular segment disks which are spaced apart from one another along the circumferential direction about the axis of rotation 16 but are arranged in a plane perpendicular to a rotational axis 16.
  • the recuperation air flows via the swirl chamber 21 into an annular channel 44, which is bounded in the radial direction with respect to the axis of rotation 16 on an inner side by the outer surface of the flame tube 41 and on an outer side by the inner surface of the holding tube 43.
  • a heat / protection element 45 is arranged in the form of a baffle on a second burner 17 opposite end of the Lamellenrekuperators 22a.
  • the baffle is attached by means not shown fasteners to an inside of the white mineral drying drum 12a.
  • the baffle 45 is designed as a disk element or plate element and arranged perpendicular to the second axis of rotation 16 within the white mineral drying drum 12a. Recuperation air, the lamella recuperator 22a at the discharge opening 46 leaves, flows against the baffle 45. This prevents flames of the burner flame 26 penetrate into the arranged behind the baffle 45 throwing plate 47. In the region of the discharge opening 46, the flow direction of the recuperation air is deflected and / or braked.
  • the original flow direction which is oriented substantially parallel to the second rotation axis 16 is deflected by up to 90 ° in a direction perpendicular to the second rotation axis 16. This results in a back pressure on the recuperation air, so that the pollutants still contained in the recuperation can be better burned with.
  • the baffle 45 also provides improved heat distribution in the white mineral drying drum 12a.
  • the heat of the burner flame 26 is distributed to the recuperation air more homogeneously and over a large area.
  • the heating of the white mineral drying drum 12a is more efficient and uniform. The material heating is thereby improved.

Claims (13)

  1. Installation de fabrication d'asphalte comprenant :
    a. un tambour séchoir pour minéraux blancs (12 ; 12a) destiné à chauffer les minéraux blancs ;
    b. une unité de conduite d'écoulement (20) du tambour séchoir pour minéraux blancs (12 ; 12a) destinée à l'introduction guidée des gaz d'échappement dans le tambour séchoir pour minéraux blancs (12 ; 12a),
    caractérisée en ce que l'unité de conduite d'écoulement (20) comporte un récupérateur de paillettes (22 ; 22a), pourvu de déflecteurs lamellaires, lequel forme une enveloppe extérieure pour le mouvement d'écoulement hélicoïdal des gaz d'échappement et/ou des gaz d'échappement secondaires, pour la combustion ciblée de la fraction des polluants contenus dans les gaz d'échappement et/ou dans les gaz d'échappement secondaires.
  2. Installation selon la revendication 1, caractérisée par un tambour séchoir à écoulement parallèle (2), destiné à chauffer la matière d'asphalte et par un dispositif d'aspiration raccordé au tambour séchoir à écoulement parallèle (2), destiné à l'aspiration des gaz d'échappement, le tambour séchoir pour minéraux blancs (12 ; 12a) étant raccordé audit dispositif d'aspiration.
  3. Installation selon la revendication 2, caractérisée en ce que le dispositif d'aspiration comporte une hotte d'échappement (9), raccordée directement au tambour séchoir à écoulement parallèle (2) et/ou en ce que le dispositif d'aspiration comporte un ventilateur d'échappement (13).
  4. Installation selon l'une quelconque des revendications 2 ou 3, caractérisée en ce que le dispositif d'aspiration comporte une conduite d'échappement secondaire (14), laquelle est raccordée au tambour séchoir pour minéraux blancs (12 ; 12a), destinée à l'amenée de gaz d'échappement secondaires.
  5. Installation selon l'une quelconque des revendications précédentes, caractérisée en ce que le tambour séchoir pour minéraux blancs (12 ; 12a) comporte un brûleur (17).
  6. Installation selon l'une quelconque des revendications précédentes, caractérisée en ce que l'unité de conduite d'écoulement (20) comporte une chambre tourbillonnaire (21), destinée à l'amenée de gaz d'échappement et/ou de gaz d'échappement secondaires au tambour séchoir pour minéraux blancs (12 ; 12a).
  7. Installation selon l'une quelconque des revendications précédentes, caractérisée en ce que le récupérateur de paillettes (22 ; 22a) comporte une section amincie (25), une section de cylindre (24) étant agencée, en particulier le long d'un axe longitudinal (17) du tambour séchoir pour minéraux blancs (12), entre une section élargie (23) et la section amincie (25).
  8. Installation selon la revendication 7, caractérisée en ce que le récupérateur de paillettes (22a) comporte une pluralité de sections amincie (25), disposées les unes derrière les autres le long de l'axe longitudinal (17).
  9. Installation selon l'une quelconque des revendications précédentes, caractérisée en ce que l'unité de conduite d'écoulement (20) comporte un tube à flammes destiné à envelopper la flamme du brûleur (26).
  10. Installation selon l'une quelconque des revendications précédentes, caractérisée par un élément de réchauffement/ de protection, lequel est disposé le long de l'axe longitudinal (17) du tambour séchoir pour minéraux blancs (12 ; 12a), derrière l'unité de conduite d'écoulement (20).
  11. Installation selon l'une quelconque des revendications précédentes, caractérisée par un dispositif de dépoussiérage (27), lequel est disposé, en particulier en aval du tambour séchoir pour minéraux blancs (12 ; 12a).
  12. Procédé de fabrication d'asphalte comprenant les étapes consistant :
    à chauffer la matière d'asphalte dans le procédé d'écoulement parallèle au moyen d'un tambour séchoir à écoulement parallèle (2) ;
    à aspirer les gaz d'échappement du tambour séchoir à écoulement parallèle (2) au moyen d'un dispositif d'aspiration ;
    à chauffer les minéraux blancs au moyen d'un tambour séchoir pour minéraux blancs (12 ; 12a) ;
    à introduire de manière guidée des gaz d'échappement au tambour séchoir pour minéraux blancs (12 ; 12a) au moyen d'une unité de conduite d'écoulement (20) ;
    à brûler la fraction des polluants contenus dans les gaz d'échappement et/ou dans les gaz d'échappement secondaires au moyen d'un récupérateur de paillettes (22 ; 22a) pourvu de déflecteurs lamellaires, lequel forme une enveloppe extérieure pour le mouvement d'écoulement hélicoïdal des gaz d'échappement et/ou des gaz d'échappement secondaires, dans le tambour séchoir pour minéraux blancs (12 ; 12a).
  13. Procédé selon la revendication 12, caractérisée par une amenée de gaz d'échappement au tambour séchoir pour minéraux blancs (12 ; 12a) au moyen d'une conduite d'échappement secondaire (14).
EP17181252.2A 2016-09-16 2017-07-13 Installation et procédé de fabrication d'asphalte Active EP3296462B1 (fr)

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PL17181252T PL3296462T3 (pl) 2016-09-16 2017-07-13 Urządzenie oraz sposób wytwarzania asfaltu

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PL (1) PL3296462T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4246071A1 (fr) * 2022-03-16 2023-09-20 Benninghoven Zweigniederlassung der Wirtgen Mineral Technologies GmbH Dispositif ignifuge et tambour de séchage doté d'un tel dispositif ignifuge

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US5201839A (en) 1989-05-15 1993-04-13 Cmi Corporation Countercurrent drum mixer with second heat source
DE4140964A1 (de) 1991-12-12 1993-06-17 Wibau Gmbh Verfahren zur herstellung von asphaltmischgut
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DE19725613A1 (de) 1997-06-17 1998-12-24 Kohlenstaubtechnik Dr Schoppe Heißgaserzeuger
DE10232373A1 (de) 2002-07-17 2004-01-29 Schoppe, Fritz, Dr.-Ing. Verfahren zur Erhöhung der Flammstabilität bei Kohlenstaubfeuerungen und Vorrichtung zur Ausführung des Verfahrens
US20040033459A1 (en) 2001-08-17 2004-02-19 Apostolos Katefidis Thermal post-combustion device
WO2012034573A1 (fr) 2010-09-16 2012-03-22 Loesche Gmbh Générateur de gaz chaud chauffé par des matières solides, ayant une plage de régulation élargie
EP2796788A1 (fr) 2013-04-24 2014-10-29 Alstom Technology Ltd Générateur de tourbillon
DE102014205203B3 (de) 2014-03-20 2015-05-21 Kba-Metalprint Gmbh Vorrichtung zur thermischen Nachverbrennung von Abluft
WO2015082341A1 (fr) 2013-12-04 2015-06-11 Benninghoven GmbH & Co. KG Mülheim Dispositif et procédé pour le réchauffage d'un granulat d'asphalte récupéré pour la production d'asphalte

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US1235855A (en) 1915-07-19 1917-08-07 Babcock & Wilcox Co Oil-burning apparatus.
US2796923A (en) 1953-03-11 1957-06-25 Nat Fuel Conservation Co Inc Oil-burner and combustion head construction and installation
DE2301156A1 (de) 1972-01-12 1973-07-19 Exxon Research Engineering Co Hochleistungsbrenner
US3845903A (en) 1973-08-15 1974-11-05 Dunham Bush Inc One piece radial vane diffuser and method of manufacturing the same
US4189238A (en) 1975-08-11 1980-02-19 Mendenhall Robert Lamar Recycled asphalt-aggregate process and apparatus
US4142803A (en) 1976-10-05 1979-03-06 Mendenhall Robert Lamar Recycled asphalt-aggregate process and apparatus
WO1986002962A1 (fr) 1984-11-13 1986-05-22 Deutsche Asphalt Gmbh Procede et installation de production de materiaux enrobes d'asphalte en reutilisant de l'asphalte broye ayant deja servi
US4638747A (en) 1985-04-01 1987-01-27 Astec Industries, Inc. Coal-fired asphalt plant
DE3530248A1 (de) 1985-08-23 1987-03-26 Bayerische Asphalt Mischwerke Verfahren und vorrichtung zur aufbereitung von bituminoesem mischgut
DE3538825A1 (de) 1985-10-31 1987-05-07 Deutsche Asphalt Gmbh Vorrichtung zur einleitung gasfoermiger medien in brennerbeheizte trockentrommeln bzw. trommelmischer von asphaltaufbereitungsanlagen
US5009174A (en) 1985-12-02 1991-04-23 Exxon Research And Engineering Company Acid gas burner
DE3624735A1 (de) 1986-07-22 1988-02-04 Wibau Ag Verfahren zur einleitung eines brennerabgases aus einer ersten trockentrommel als tertiaerluft in den brenner einer zweiten trommel, sowie eine vorrichtung zur ausuebung des verfahrens
DE3738790A1 (de) 1986-11-14 1988-06-09 Wilhelm Hafner Vorrichtung zur nachbrennung von ablauf
US5201839A (en) 1989-05-15 1993-04-13 Cmi Corporation Countercurrent drum mixer with second heat source
US5174650A (en) 1990-07-23 1992-12-29 Cedarapids, Inc. Dual drum recycle asphalt drying and mixing method and apparatus
WO1992003211A1 (fr) 1990-08-17 1992-03-05 Fritz Schoppe Procede et dispositif de desulfuration complete a sec de gaz de combustion contenant du so2 et des poussieres
DE4140964A1 (de) 1991-12-12 1993-06-17 Wibau Gmbh Verfahren zur herstellung von asphaltmischgut
DE4208951A1 (de) 1992-03-19 1993-09-23 Loesche Gmbh Heissgaserzeuger
EP0632242A1 (fr) 1993-07-02 1995-01-04 U. Ammann Maschinenfabrik AG Séchage et/ou chauffage de matériau en vrac
US5664881A (en) 1993-11-16 1997-09-09 Maxam Equipment, Inc. Counter-flow asphalt plant with multi-stage combustion zone overlapping the mixing zone
US5538340A (en) 1993-12-14 1996-07-23 Gencor Industries, Inc. Counterflow drum mixer for making asphaltic concrete and methods of operation
DE19725613A1 (de) 1997-06-17 1998-12-24 Kohlenstaubtechnik Dr Schoppe Heißgaserzeuger
DE19738054A1 (de) 1997-09-01 1998-04-02 Koehne Heinrich Dr Ing Verfahren und Vorrichtung zur Veränderung der Drallzahl der Verbrennungsluft eines Brenners während des Betriebes
US20040033459A1 (en) 2001-08-17 2004-02-19 Apostolos Katefidis Thermal post-combustion device
DE10232373A1 (de) 2002-07-17 2004-01-29 Schoppe, Fritz, Dr.-Ing. Verfahren zur Erhöhung der Flammstabilität bei Kohlenstaubfeuerungen und Vorrichtung zur Ausführung des Verfahrens
WO2012034573A1 (fr) 2010-09-16 2012-03-22 Loesche Gmbh Générateur de gaz chaud chauffé par des matières solides, ayant une plage de régulation élargie
EP2796788A1 (fr) 2013-04-24 2014-10-29 Alstom Technology Ltd Générateur de tourbillon
WO2015082341A1 (fr) 2013-12-04 2015-06-11 Benninghoven GmbH & Co. KG Mülheim Dispositif et procédé pour le réchauffage d'un granulat d'asphalte récupéré pour la production d'asphalte
DE102014205203B3 (de) 2014-03-20 2015-05-21 Kba-Metalprint Gmbh Vorrichtung zur thermischen Nachverbrennung von Abluft

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4246071A1 (fr) * 2022-03-16 2023-09-20 Benninghoven Zweigniederlassung der Wirtgen Mineral Technologies GmbH Dispositif ignifuge et tambour de séchage doté d'un tel dispositif ignifuge

Also Published As

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DE102017212046A1 (de) 2018-03-22
ES2693606T3 (es) 2018-12-12
EP3296462A1 (fr) 2018-03-21
PL3296462T3 (pl) 2019-06-28
DK3296462T3 (en) 2019-01-07

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