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WO1997016600A1 - Procede et appareil de chauffage de matiere rocheuse - Google Patents

Procede et appareil de chauffage de matiere rocheuse Download PDF

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Publication number
WO1997016600A1
WO1997016600A1 PCT/FI1996/000587 FI9600587W WO9716600A1 WO 1997016600 A1 WO1997016600 A1 WO 1997016600A1 FI 9600587 W FI9600587 W FI 9600587W WO 9716600 A1 WO9716600 A1 WO 9716600A1
Authority
WO
WIPO (PCT)
Prior art keywords
conveyor
heat
heated
heating
transmitting
Prior art date
Application number
PCT/FI1996/000587
Other languages
English (en)
Inventor
Hannu Heikkinen
Matti Karilainen
Original Assignee
Amomatic Oy
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 Amomatic Oy filed Critical Amomatic Oy
Priority to EP96934873A priority Critical patent/EP0858531B1/fr
Priority to AU73005/96A priority patent/AU7300596A/en
Priority to AT96934873T priority patent/ATE235608T1/de
Priority to DE69627001T priority patent/DE69627001T2/de
Publication of WO1997016600A1 publication Critical patent/WO1997016600A1/fr

Links

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
    • E01C19/05—Crushing, pulverising or disintegrating apparatus; Aggregate screening, cleaning, drying or heating apparatus; Dust-collecting arrangements specially adapted therefor
    • 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
    • E01C19/1004—Reconditioning or reprocessing bituminous mixtures, e.g. salvaged paving, fresh patching mixtures grown unserviceable; Recycling salvaged bituminous mixtures; Apparatus for the in-plant recycling thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/18—Drying solid materials or objects by processes involving the application of heat by conduction, i.e. the heat is conveyed from the heat source, e.g. gas flame, to the materials or objects to be dried by direct contact
    • F26B3/20—Drying solid materials or objects by processes involving the application of heat by conduction, i.e. the heat is conveyed from the heat source, e.g. gas flame, to the materials or objects to be dried by direct contact the heat source being a heated surface, e.g. a moving belt or conveyor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/28—Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun
    • F26B3/30—Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun from infrared-emitting elements

Definitions

  • the invention relates to a method for heating rock material, in which method rock material is conveyed by a conveyor, located between a feeding device and the production equipment, whereupon the rock material is heated by a heater arranged above it .
  • the present invention relates to an apparatus for heating rock material, which apparatus comprises a conveyor, located between the feeding device and the production equipment, and at least one heating unit arranged above the conveyor for heating the material that is conveyed by the conveyor.
  • Rock material is used e.g. when concrete, asphalt mix and stone chips are produced. In the produc ⁇ tion process the rock material is heated to the tempera ⁇ ture required for production. Occasionally there is also a need for heating the rock material to dry it.
  • a known solution is e.g. such that heat from an oil burner is used for heating and drying the rock material in a rotating drum.
  • the heated rock material is conveyed to the production equipment for the actual product, where the rock material and the additive are mixed.
  • asphalt mix is produced the additive is bitumen.
  • the solution in question produces emissions harmful both to people and the environment.
  • the oil used in the apparatus has to be stored at the operation site, which is a risk factor.
  • dusting constitutes another problem, which necessi ⁇ tates the use of expensive filtering equipment. More ⁇ over, the known equipment is sizeable, complicated and expensive .
  • Patent 4 011 023 again disclo ⁇ ses an apparatus for lifting up weathered pavement material from the road, heating it and spreading it as new pavement material on the roadbed site, after an additive has been mixed into it.
  • the apparatus comprises two conveyors, provided with heaters.
  • the apparatus dis ⁇ closed in European Patent Application 0 033 911 com ⁇ prises two capacitive high-frequency heating units arranged above the conveyor. Further, European Patent
  • Application 0 146 939 discloses an apparatus comprised of a conveyor screw for conveying crumbled asphalt and infrared heating devices provided above it.
  • the drawback with the solutions mentioned above is that to be heated sufficiently the conveyor necessarily has to be made quite long or several conveyors must be employed, since enough heat cannot by using the methods in question, be transmitted to the material without impairing the quality of the material, when it is conve- yed only a short distance. If the surface temperature of the material is raised too high the material starts to fume or even burn.
  • the apparatus is large, complicated and expensive.
  • Another object of the present invention is to provide a new type of apparatus for heating rock material, thereby avoiding the drawbacks of known solu ⁇ tions and making possible an effective processing of rock material .
  • the conveyor is heated, whereby the material will be heated both by a heating unit from above the conveyor and by heat transmitted by the heated conveyor.
  • the conveyor located between the feeding device and the production equipment, is a heat-transmitting conveyor and that the heat-trans ⁇ mitting conveyor is arranged to be heated so that the material in the apparatus is heated both by the heating unit located above it and by heat from the heated heat- transmitting conveyor.
  • the conveyor is heated so that the rock material fed to the conveyor to be transported, is heated by the com ⁇ bined heating effect from heaters placed above the con- veyor and by heat from the heated conveyor.
  • the essential idea in an embodiment of the invention is that the conveyor is run empty, without a load of rock material, with the heaters on, whereupon the conveyor is heated. After that rock material is fed to the con- veyor and heated while it is being transported.
  • the essential idea in yet another embodiment of the inven ⁇ tion is that the conveyor is heated by a separate heater, meant to be used exclusively for heating the conveyor.
  • the surface of the conveyor intended for transporting the rock material is furnished with projections penetrating into the material, whereby heat transmission from the conveyor to the material is enhanced.
  • the advantage of the solution of the invention is that the heating effect of the apparatus considerably improves when heat is transmitted to the material both from the heater above the conveyor and from the conveyor itself, that is, essentially through the whole interface formed by the material.
  • the apparatus can be made smaller which renders it easier to handle under field conditions.
  • the heating method of the inven ⁇ tion is more gentle for the material to be heated, as the required heat does not have to be transmitted through one surface layer only.
  • Figure 1 is a schematic representation of an asphalt concrete mixing plant, where an apparatus ac- cording to the embodiment of the invention is utilized for heating rock material, and
  • Figures 2 - 4 show a schematic, cut-away side view of some conveyor apparatus of the invention for heating rock material.
  • Figure 1 is a schematic representation of an asphalt mixing plant, where the solution of the inven ⁇ tion is utilized for heating rock material.
  • the embodi ⁇ ment in question comprises a device 1 for feeding rock material and a heating device 2 for conveying and simul- taneously heating rock material.
  • the mixing plant comprises production equipment 3, which is charac ⁇ teristically a mixing device.
  • the asphalt apparatus further comprises transport conveyor means 4 for convey ⁇ ing prepared asphalt material, produced by the produc- tion equipment 3 , to a storage section 5 and further to the site of application. In the apparatus illustrated in the figure, production will take place so that rock material or e.g.
  • the weathered asphalt material lifted up from the roadbed site, is fed into the heating device 2 by the feeding device 1, which heating device 2 com ⁇ prises a conveyor and means for heating the material fed to be transported by the conveyor while it is conveyed to the production equipment 3.
  • the heating device 2 heats the material to the temperature required for pro- duction.
  • the rock material can also be dried by heating it by means of the heating device 2.
  • the heating device 2 is arranged between the feeding device 1 and the production equipment .
  • the material heated by the the heating device 2 and conveyed to the production equipment 3 is mixed there with the other ingredients of the product, e.g. bitumen.
  • the production process can be cyclic; i.e.
  • the production equipment 3 is charged with material fed by the heating device 2 and with other materials, fed by other transport means, after which charging is interrupted and the production process started.
  • the production equiment 3 is a mixing device that mixes the charged materials.
  • the production batch is ready, it is conveyed by the conveyor 4 to the storage section 5 to remain there until it is transfer- red to the site of application. After this the phases of the cycle described above are repeated.
  • the whole apparatus illustrated above can be constructed to be highly mobile so that it can be moved to the vicinity of the site of application. It is further possible that the plant comprises several heating devices 2 and it is also possible to arrange weighing or handling appliances or intermediate storage between the feeding device 1 and the production equipment 3.
  • FIGS 2 - 4 show a cut-away side view of some heating devices 2 of the invention, presented in a sche- matical, simplified way.
  • the heating device 2 shown in figure 2 comprises a heat-transmitting conveyor 6, pre ⁇ ferably a slat conveyor, but it can also be any other type of conveyor providing an equivalent function and forming a closed loop.
  • Heating units 7, e.g. infrared units or similar radiant heaters, are arranged near the heat-transmitting conveyor 6, preferably above the heat- transmitting conveyor 6.
  • Preferably liquid gas is used to provide heating energy, but other energy sources may also come into question.
  • the number of heating units 7 and their power is designed to meet the heat require ⁇ ments and suit the dimensions of the heating device 2.
  • the heating device 2 is preferably fitted inside a cover, illustrated in figure 4.
  • the heating device 2 illustrated in figure 2 is continuously working and it is cyclically charged from the feeding device 1 with material to be heated and transported.
  • the heating device 2 is run empty, without transported material, while the heating units 7 are working and heating the heat-transmitting conveyor 6.
  • the heat-transmitting conveyor 6 stores heat in its structure.
  • the pro ⁇ duction equipment 3 has turned out the previous lot, it is emptied and recharging begun.
  • Now feeding device 1 is charging material to the heat-transmitting conveyor 6, by which it is conveyed toward the production equip ⁇ ment 3, while the material is simultaneously heated by the heating units 7, arranged above the heat-transmit- ting conveyor 6. What is essential is that in accordance with the idea of the invention, the material is heated also by heat transmitted to it from the structure of the heated heat-transmitting conveyor 6.
  • FIG 3 again shows an embodiment of the heat- ing device according to Figure 2, wherein the heat-trans- mitting conveyor 6 is arranged to be heated, in addition to the heating units 7 arranged above the conveyor, by separate, additional heaters 9, which can be con ⁇ structed like the heating units 7.
  • the additional heat- ing units 9 can be arranged, as illustrated in the fig ⁇ ure, to heat the empty part of the heat-transmitting conveyor 6 below the conveyor part that returns empty.
  • this solution can be applied, not only in cyclical operation, but also in situations where continuous recharging is required.
  • FIG 4 shows an embodiment of the heating device of Figure 2, where the additional heaters 9 are arranged inside the closed loop formed by the heat-transmitting conveyor 6, in the space between that part of the conveyor that is conveying the material and the part that is returning empty.
  • the addi ⁇ tional heaters 9 heat the empty part of the heat-trans- mitting conveyor 6 from the inner side of the conveyor part that returns empty, i.e. the side that is not meant to lie against the material to be conveyed, as illus ⁇ trated in the figure.
  • the additional heaters 9 are pre ⁇ ferably positioned so that the heating effect is directed downwards, which prevents material possibly dropping from the heat-transmitting conveyor 6 from entering the additional heater 9 and catching fire there.
  • protrusions 10 are provided on the surface of the heat-transmitting conveyor 6 that lies against the material, to improve heat transmission from the heat-transmitting conveyor 6 to the material.
  • the protrusions 10 can be either fixed or replaceable elements protruding from the sur ⁇ face of the heat-transmitting conveyor 6.
  • the protrusion 10 is of a laminar construction so that its heat-emitting surface is large.
  • the protrusion 10 can also comprise e.g. a lattice and form a kind of grate. Further, if the conveyor is arranged to slope enough vertically, a mixing of the material can be achieved with these protrusions 10.
  • the apparatus in Figure 4 can be used both for cycli ⁇ cal and continuous charging.
  • a cover 8 is shown in the figure, which can be insulated to minimize energy consumption and be provided with devices for removing gases, formed during the heating process, from inside the cover 8. The gases are sucked out by a fan 11 and led to the feeding device 1 through a duct 12. The air heated in the heating device 2 is thus being utilized for preheating the material and simultaneously air impurities like dust and harmful gases are bound to the charged material.
  • a filtering apparatus can be arranged in the duct 12 for removing impurities.
  • the invention is also suitable for heating a ready mixture like rock material and bitumen, for example. In the same way, it can also be used for heating and handling materials other than rock materials.
  • the invention to which the application relates can be implemented in conveying and simulta ⁇ neously heating plastic, glass and similar materials. Further, the invention can be implemented in processing and drying waste liquor from the paper industry. It is also possible that the apparatus comprises the addi ⁇ tional heaters arranged both as shown in Figure 3 and in Figure 4, which will make the heating of the heat- transmitting conveyor very effective.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Road Paving Machines (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Medicines Containing Plant Substances (AREA)
  • Executing Machine-Instructions (AREA)
  • Retry When Errors Occur (AREA)
  • Forging (AREA)

Abstract

Procédé permettant de chauffer de la matière rocheuse lorsqu'on produit du béton, un mélange d'asphalte ou des produits similaires. Selon le procédé, on chauffe la matière rocheuse sous l'action combinée d'une unité de chauffage (7) située au-dessus du convoyeur et d'un convoyeur (6) transmetteur de chaleur chauffé. La chaleur est transférée par convection à partir du convoyeur (6) transmetteur de chaleur chauffé au matériau transporté. Est également décrit un appareil de chauffage de matière rocheuse. L'appareil comporte un convoyeur (6) transmetteur de chaleur qui est chauffé, soit simplement par une unité de chauffage (7) située au-dessus, lorsque le convoyeur n'est pas utilisé pour charger, soit par un dispositif de chauffage séparé supplémentaire (9), soit par la combinaison de ces deux dispositifs.
PCT/FI1996/000587 1995-11-02 1996-11-01 Procede et appareil de chauffage de matiere rocheuse WO1997016600A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP96934873A EP0858531B1 (fr) 1995-11-02 1996-11-01 Procede et appareil de chauffage de matiere rocheuse
AU73005/96A AU7300596A (en) 1995-11-02 1996-11-01 Method and apparatus for heating rock material
AT96934873T ATE235608T1 (de) 1995-11-02 1996-11-01 Verfahren und vorrichtung zum erwärmen von gesteinsmaterial
DE69627001T DE69627001T2 (de) 1995-11-02 1996-11-01 Verfahren und vorrichtung zum erwärmen von gesteinsmaterial

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FIU950466 1995-11-02
FI950466U FI2227U1 (fi) 1995-11-02 1995-11-02 Anordning foer uppvaermning av stenmaterial

Publications (1)

Publication Number Publication Date
WO1997016600A1 true WO1997016600A1 (fr) 1997-05-09

Family

ID=8542708

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI1996/000587 WO1997016600A1 (fr) 1995-11-02 1996-11-01 Procede et appareil de chauffage de matiere rocheuse

Country Status (6)

Country Link
EP (1) EP0858531B1 (fr)
AT (1) ATE235608T1 (fr)
AU (1) AU7300596A (fr)
DE (1) DE69627001T2 (fr)
FI (1) FI2227U1 (fr)
WO (1) WO1997016600A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1014021A3 (fr) * 1998-12-24 2001-09-26 GoGas Goch GmbH & Co Sécheur de matériau en vrac
FR2866037A1 (fr) * 2004-02-09 2005-08-12 Emile Lopez Procede et dispositif de mise en temperature de granulats et/ou d'enrobes routiers, notamment d'enrobes usages a recycler
CN111058355A (zh) * 2019-12-26 2020-04-24 无锡锡通工程机械有限公司 低温催化燃气中长波干燥滚筒
CN112608759A (zh) * 2020-12-06 2021-04-06 河南九一环保科技股份有限公司 一种利用太阳能加热石料的方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110986552A (zh) * 2019-11-29 2020-04-10 苏州氟特电池材料股份有限公司 高效的锂电池材料烘干箱

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191123694A (en) * 1911-10-26 1912-10-03 Henry Frank Berry Improvements in Apparatus for Heating, Drying and otherwise Treating Stone and other Materials for use on Roads and like Surfaces.
US4011023A (en) * 1975-12-15 1977-03-08 Cutler Repaving, Inc. Asphalt pavement recycling apparatus
EP0033911A1 (fr) * 1980-02-12 1981-08-19 Siemens Aktiengesellschaft Dispositif pour l'échauffement capacitif par haute fréquence d'un matériau en morceaux contenant du goudron ou du bitume
EP0146939A2 (fr) * 1983-12-29 1985-07-03 Deutag-Mischwerke GmbH Dispositif et procédé de chauffage d'asphalte concassé

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191123694A (en) * 1911-10-26 1912-10-03 Henry Frank Berry Improvements in Apparatus for Heating, Drying and otherwise Treating Stone and other Materials for use on Roads and like Surfaces.
US4011023A (en) * 1975-12-15 1977-03-08 Cutler Repaving, Inc. Asphalt pavement recycling apparatus
EP0033911A1 (fr) * 1980-02-12 1981-08-19 Siemens Aktiengesellschaft Dispositif pour l'échauffement capacitif par haute fréquence d'un matériau en morceaux contenant du goudron ou du bitume
EP0146939A2 (fr) * 1983-12-29 1985-07-03 Deutag-Mischwerke GmbH Dispositif et procédé de chauffage d'asphalte concassé

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1014021A3 (fr) * 1998-12-24 2001-09-26 GoGas Goch GmbH & Co Sécheur de matériau en vrac
FR2866037A1 (fr) * 2004-02-09 2005-08-12 Emile Lopez Procede et dispositif de mise en temperature de granulats et/ou d'enrobes routiers, notamment d'enrobes usages a recycler
WO2005075742A1 (fr) * 2004-02-09 2005-08-18 Emile Lopez Procede et dispositif de mise en temperature de granulats et/ou d'enrobes routiers, notamment d'enrobes usages a recycler
US9045867B2 (en) 2004-02-09 2015-06-02 Fenixfalt Method and device for heating worn road coating materials
CN111058355A (zh) * 2019-12-26 2020-04-24 无锡锡通工程机械有限公司 低温催化燃气中长波干燥滚筒
CN112608759A (zh) * 2020-12-06 2021-04-06 河南九一环保科技股份有限公司 一种利用太阳能加热石料的方法

Also Published As

Publication number Publication date
FI2227U1 (fi) 1995-12-18
FIU950466U0 (fi) 1995-11-02
DE69627001D1 (de) 2003-04-30
EP0858531B1 (fr) 2003-03-26
DE69627001T2 (de) 2004-01-29
AU7300596A (en) 1997-05-22
ATE235608T1 (de) 2003-04-15
EP0858531A1 (fr) 1998-08-19

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