EP0355701A2 - Dispositif pour régler la température de gaz de sortie dans un tambour pour la préparation d'une mixture dans la fabrication de produits enrobés bitumineux - Google Patents

Dispositif pour régler la température de gaz de sortie dans un tambour pour la préparation d'une mixture dans la fabrication de produits enrobés bitumineux Download PDF

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Publication number
EP0355701A2
EP0355701A2 EP89115123A EP89115123A EP0355701A2 EP 0355701 A2 EP0355701 A2 EP 0355701A2 EP 89115123 A EP89115123 A EP 89115123A EP 89115123 A EP89115123 A EP 89115123A EP 0355701 A2 EP0355701 A2 EP 0355701A2
Authority
EP
European Patent Office
Prior art keywords
drum
exhaust gas
burner
gas extraction
extraction line
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.)
Granted
Application number
EP89115123A
Other languages
German (de)
English (en)
Other versions
EP0355701B1 (fr
EP0355701A3 (en
Inventor
Benno Dr. Ing. Stork
Ekkehard Dipl.-Ing. Papke
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.)
Ats Asphalttechnik und Strassenbaugerate & Co KG GmbH
Hamburger Baustoffgesellschaft Mbh & Co KG
Original Assignee
Ats Asphalttechnik und Strassenbaugerate & Co KG GmbH
Hamburger Baustoffgesellschaft Mbh & Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ats Asphalttechnik und Strassenbaugerate & Co KG GmbH, Hamburger Baustoffgesellschaft Mbh & Co KG filed Critical Ats Asphalttechnik und Strassenbaugerate & Co KG GmbH
Priority to AT89115123T priority Critical patent/ATE86323T1/de
Publication of EP0355701A2 publication Critical patent/EP0355701A2/fr
Publication of EP0355701A3 publication Critical patent/EP0355701A3/de
Application granted granted Critical
Publication of EP0355701B1 publication Critical patent/EP0355701B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • E01C19/1063—Controlling the operations
    • 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

Definitions

  • the invention relates to a device for regulating the exhaust gas temperature in drum devices provided for the preparation of mixed material in the production of asphalt, which have internals arranged in their interior on the inner walls, of which Chen the mixed material to be processed is either fully or limited conveyed over the free cross section of the interior of the drum devices.
  • drum devices In such known drum devices, a basic distinction must be made between two differently operating methods, namely, on the one hand, between a countercurrent and, on the other hand, a co-operating drum device.
  • a drum In a counter-current drum device, hereinafter referred to as a drum, the material to be heated migrates in counter-current to the heating gases through the drum.
  • the material is first introduced into the interior at the end opposite the burner of the drum and conveyed finely distributed towards the burner by internals arranged on the inner wall of the drum and designed as trickle blades for exchanging the heat with the heating gases.
  • internals In the area of the strongest flame radiation, it is promoted by internals which on the one hand prevent the flame from burning out as little as possible and on the other hand keep the material out of the immediate area of the flame and convey it along the drum walls.
  • Such previously known drums are equipped with a suction housing provided on the end opposite the burner.
  • the exhaust gas temperature in this suction housing is influenced on the one hand by the amount of material in the drum and on the other hand by the Intensity of the material veil, caused by the internals.
  • the temperature can fluctuate from 50 ° C to well over 400 ° C.
  • the drum exhaust gases from such a device are cleaned in downstream filter dedusting, a pre-separator being provided regularly between the drum on the one hand and the downstream filter for separating the sand portions from the filler portion, the separation limit ideally being 0.09 mm grain size.
  • the filters provided in the filter dedusting are extremely sensitive to falling below dew point and overheating.
  • the exhaust gas can also fall below the dew point at temperatures up to 100 ° C.
  • the filter cloths used today are inexpensive, temperature-resistant up to 140 ° C and commercially available. Filter cloths resistant to higher temperatures are more expensive, almost twice as expensive. Such higher temperature resistant cloths are very sensitive to falling below the dew point.
  • Specialists have long been trying to keep the drum exhaust temperature constant at around 90 ° C. Because of the aforementioned fluctuations in throughput and in material quality or quality, this usually does not succeed.
  • feed belts already protruding into the interior of the drum were therefore pre-selected that throw the material to be processed into the drum at different distances. Due to the reduced length of the heat exchange zone, regulation of the exhaust gas temperature should be achieved. The success of a change in the material flow has so far been unsatisfactory.
  • the drum described at the outset is also used in asphalt preparation plants which work with two drum devices operating in parallel, in which the second drum device is a drum operating in direct current.
  • this drum either broken up asphalt material, also called asphalt granulate, is gently processed and mixed in a downstream third mixing device, for example designed as a compulsory mixer, with the new material heated in the first drum device and processed into the final asphalt mix or the heated material transferred from the drum New material prepared with fresh bitumen for asphalt mixing.
  • Such a device is known from US Pat. No. 4,477,250.
  • the heat capacity of the second drum device can be increased and decreased by regulating the exhaust gas temperature from the first drum device.
  • the exhaust gas temperature control is therefore a control of the heating power for the downstream second drum. This is important, for example, whenever the second drum is used to heat
  • temperature-sensitive material such as asphalt granulate is used, as is done when recycling asphalt granulate.
  • the new material in the first drum is strongly heated.
  • the exhaust gas temperatures which are already very high due to the lack of fine particles, are used to heat granulate in the second drum.
  • this method is difficult to control since there is no control device for the exhaust gas temperature.
  • the object of the present invention is therefore to provide a device for regulating the exhaust gas temperature in a countercurrent drum, which does not influence the material flow but the exhaust gas extraction and thereby further allows the temperature of a processing system equipped with two drums working in parallel Asphalt granulate can be specifically controlled or controlled in the downstream drum, in which case the arrangement of a pre-separator mentioned above for separating the sand content from the filler content can be omitted.
  • the finished asphalt mix is already produced by introducing liquid (new) bitumen.
  • the regulation of the exhaust gas conditions for the temperature determination of the processed material is necessary, not to regulate or control the setting of the exhaust gas temperature because of the downstream filter device and / or a further drum device, as in the task set for this application.
  • the drum device is a countercurrent drum which has a first exhaust gas extraction line at its end opposite the burner and a tubular second exhaust gas extraction line arranged in its interior, which is arranged with its inlet opening at a distance from the burner.
  • the second exhaust gas suction line is arranged concentrically in the drum and its entry into the interior of the drum lies on the end wall arranged opposite the burner.
  • This configuration of the second exhaust gas suction line or its installation in the drum results in a uniform interior design of the drum, starting from the inlet opening of the second exhaust gas suction line to the end wall of the drum opposite the burner.
  • the internals for conveying the material to be processed can also be formed on the inside of the drum in this area, so that, for example, the material to be conveyed and thrown does not remain on the outer wall of the second exhaust gas suction line or bake there.
  • the length of the second exhaust gas extraction line or its distance from the burner can be changed with its inlet opening. This arrangement enables the burner flame on the one hand and the absorption effect of the inlet opening on the other to be coordinated.
  • First and second exhaust gas suction lines according to their are advantageous Exit from the burner opposite end wall of the drum merged and equipped with throttle valves in the area of their merging. This configuration ensures that the exhaust gas fractions from the respective exhaust gas extraction lines can be regulated and metered against each other.
  • first and second exhaust-gas extraction lines can open together in a second drum device, thereby making it possible to regulate the filter inlet temperature.
  • This design further ensures that, on the one hand, the temperature-adjustable exhaust gases from the first drum device can be used in an energy-saving manner in a downstream further drum device and, on the other hand, that the further drum device, which advantageously works in direct current, also works as a pre-separator for the sand content in the filler material and this amount deposited at the end of this drum and separately fed back to the mixing process.
  • This drum replaces the pre-separator that is usually installed in front of the filter.
  • the device for regulating the exhaust gas temperature is arranged in a drum device which is provided for the preparation of mixed material in asphalt production and which is designed as a drum 2 operating in countercurrent.
  • the material required for asphalt production for example new material without Portions of bitumen etc. are introduced into the interior 4 of the drum 2 via the inlet openings 3 provided in the drum 2 and, as a result of the rotation of the drum 2, by means of blade-like internals 6 provided on the inner wall 5 of the drum 2 in the direction of the end of the drum in the vicinity of the burner 7 arranged there provided outlet openings 8, the scoop-shaped internals 6, depending on their design, distribute the material to be treated either over the entire cross section of the interior 4 of the drum 2 or over a portion thereof.
  • an exhaust gas outlet 11 is provided, to which a first exhaust gas extraction line 12 is connected and which is connected via throttle valves 13 to an exhaust gas exhaust 14 which, for example, uses a suction fan 15 to filter systems (not shown) forwards.
  • a second exhaust gas extraction line 16 is fixed concentrically in the interior 4 of the drum 2 by means of corresponding holding devices 17, the inlet opening 18 of which is arranged at a distance A from the outlet of the burner flame 19 from the burner 7.
  • This second exhaust gas extraction line 16 is also guided concentrically through the exhaust gas outlet 11 arranged in the end wall 10 and ends in the vicinity of the throttle valves 13 of the first exhaust gas extraction line 12 via a further throttle valve 20 into the exhaust gas train 14.
  • the throttle valves 13 and 20 can be adjustable depending on one another, furthermore it can be provided that the distance A between the burner flame 19 emerging from the burner 7 on the one hand and the inlet opening 18 of the second exhaust gas extraction line 16 is variable, with either the burner 7 in is designed to be displaceable in the axial longitudinal direction in the end wall 9 of the drum 2 or the length of the second exhaust gas extraction line 16 projecting into the interior 4 of the drum 2 can be varied, for example in the manner of a telescope.
  • An advantageous positioning of the inlet opening 18 of the second exhaust gas extraction line 16 lies at the end of the burnout zone of the burner flame 19, starting from an advantageous setting of the burner 7 or the burner flame 19. At this point, the flame gases are still particularly hot, ie with a temperature of approx. 600 - 1,000 ° C.
  • the extraction of these hot gases through the second exhaust gas extraction line 16 enables a temperature to be reached both in the area of the interior 4 of the drum 2, where the second exhaust gas extraction line 16 is arranged, and in the exhaust gas exhaust 14, which is referred to as the mixing temperature which can be regulated as required can be.
  • the throttle valves 13 of the first exhaust gas suction line 12 remain fully open.
  • the second (inner) exhaust gas extraction line 16 is connected via its Throttle valve 20 only partially open.
  • the desired drum exhaust gas temperature can be set specifically for a specific operating situation by the blade-shaped internals 6. In the case of a material that is more fine-grained, the exhaust gas temperature would then be reduced, based on the same throughput rates. Since this would now disrupt the operating sequence, the suction power can be increased by the second exhaust gas suction line 16 for compensation. Alternatively, the temperature in the exhaust gas can rise if the rock is very coarse. At the same throughput, the amount of air drawn off through the second exhaust gas extraction line 16 would then be reduced to reduce the drum exhaust gas temperature. This would achieve the maximum possible heat exchange performance with the flap completely closed. This reserve in the heat exchange capacity of the device in connection with the controllable amount of air allows the exhaust gas temperature to be kept constant, which is particularly important for the downstream filters.
  • the temperature of the material to be processed in a parallel drum e.g. B. asphalt granules are checked.
  • a major advantage of the device described above is that no openings are to be arranged in the wall in the drum 2 in the central region. Such exhaust gas outlet openings influence the material flow of the material to be processed, at these points the material can accumulate, cake etc. These disadvantages are avoided by the above-described arrangement of a concentrically arranged second exhaust gas extraction line 16 in the interior 4 of the drum.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Paving Machines (AREA)
EP89115123A 1988-08-22 1989-08-16 Dispositif pour régler la température de gaz de sortie dans un tambour pour la préparation d'une mixture dans la fabrication de produits enrobés bitumineux Expired - Lifetime EP0355701B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89115123T ATE86323T1 (de) 1988-08-22 1989-08-16 Vorrichtung zur regelung der abgastemperatur in fuer die aufbereitung von mischgut bei der asphaltherstellung vorgesehenen trommelvorrichtungen.

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE3828425A DE3828425A1 (de) 1988-08-22 1988-08-22 Vorrichtung zur regelung der abgastemperatur in fuer die aufbereitung von mischgut bei der asphaltherstellung vorgesehenen trommelvorrichtung
DE3828425 1988-08-22
DE8810609U DE8810609U1 (de) 1988-08-22 1988-08-22 Vorrichtung zur Regelung der Abgastemperatur in für die Aufbereitung von Mischgut bei der Asphaltherstellung vorgesehenen Trommelvorrichtungen

Publications (3)

Publication Number Publication Date
EP0355701A2 true EP0355701A2 (fr) 1990-02-28
EP0355701A3 EP0355701A3 (en) 1990-10-10
EP0355701B1 EP0355701B1 (fr) 1993-03-03

Family

ID=39357659

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89115123A Expired - Lifetime EP0355701B1 (fr) 1988-08-22 1989-08-16 Dispositif pour régler la température de gaz de sortie dans un tambour pour la préparation d'une mixture dans la fabrication de produits enrobés bitumineux

Country Status (2)

Country Link
EP (1) EP0355701B1 (fr)
DE (2) DE8810609U1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2956125A1 (fr) * 2010-02-11 2011-08-12 Famaro Installation de production de produits enrobes bitumineux.
US9611578B2 (en) 2004-10-22 2017-04-04 Whirlpool Corporation Modular laundry system

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7617702B2 (en) 2000-07-25 2009-11-17 Whirlpool Corporation Modular laundry system with cabinet module
US7624600B2 (en) 2000-07-25 2009-12-01 Whirlpool Corporation Modular laundry system with horizontally arranged cabinet module
US7628043B2 (en) 2000-07-25 2009-12-08 Whirlpool Corporation Modular laundry system with horizontal modules
US11851221B2 (en) 2022-04-21 2023-12-26 Curium Us Llc Systems and methods for producing a radioactive drug product using a dispensing unit

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE528655C (de) * 1931-07-02 Albrecht Reiser Fa Trockentrommel fuer Strassenbaustoffe
GB1443424A (en) * 1972-10-13 1976-07-21 Redland Roadstone Ltd Method and apparatus for production of coated roadstone
DE2914286C2 (de) * 1979-04-09 1982-03-25 Wibau Industrie und Verwaltung GmbH, 6466 Gründau Verfahren zur Aufbereitung von bituminösem Mischgut in einem im Gleichstrom befeuerten Trommelmischer mit einer im Endbereich des Trommelmischers angeschlossenen Ansaugeanlage
US4477250A (en) * 1983-03-07 1984-10-16 Mechtron International Corporation Asphalt recycle plant and method
DE3414365A1 (de) * 1984-04-16 1985-10-24 Erich Dipl.-Ing. 8000 München Schambeck Einrichtung zur aufbereitung von bituminoesem mischgut, insbesondere strassenbauasphalt
DE3441382A1 (de) * 1984-11-13 1986-05-22 Deutsche Asphalt Gmbh, 6000 Frankfurt Verfahren und vorrichtung zum aufbereiten von asphalt

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9611578B2 (en) 2004-10-22 2017-04-04 Whirlpool Corporation Modular laundry system
US10041201B2 (en) 2004-10-22 2018-08-07 Whirlpool Corporation Modular laundry system
US10443176B2 (en) 2004-10-22 2019-10-15 Whirlpool Corporation Laundry system
FR2956125A1 (fr) * 2010-02-11 2011-08-12 Famaro Installation de production de produits enrobes bitumineux.
WO2011098692A1 (fr) * 2010-02-11 2011-08-18 Famaro Installation de production de produits enrobes bitumineux

Also Published As

Publication number Publication date
EP0355701B1 (fr) 1993-03-03
DE3828425A1 (de) 1990-03-01
DE8810609U1 (de) 1988-10-27
EP0355701A3 (en) 1990-10-10

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