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WO2000031483A1 - Refroidisseur de materiau particulaire - Google Patents

Refroidisseur de materiau particulaire Download PDF

Info

Publication number
WO2000031483A1
WO2000031483A1 PCT/EP1999/009066 EP9909066W WO0031483A1 WO 2000031483 A1 WO2000031483 A1 WO 2000031483A1 EP 9909066 W EP9909066 W EP 9909066W WO 0031483 A1 WO0031483 A1 WO 0031483A1
Authority
WO
WIPO (PCT)
Prior art keywords
cooler
inlet
supporting surface
kiln
cooler according
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.)
Ceased
Application number
PCT/EP1999/009066
Other languages
English (en)
Inventor
Peter Sorensen
Mogens Juhl Fons
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.)
FLSmidth and Co AS
Original Assignee
FLSmidth and Co AS
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 FLSmidth and Co AS filed Critical FLSmidth and Co AS
Priority to AU16539/00A priority Critical patent/AU1653900A/en
Publication of WO2000031483A1 publication Critical patent/WO2000031483A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28C—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA COME INTO DIRECT CONTACT WITHOUT CHEMICAL INTERACTION
    • F28C3/00—Other direct-contact heat-exchange apparatus
    • F28C3/10—Other direct-contact heat-exchange apparatus one heat-exchange medium at least being a fluent solid, e.g. a particulate material
    • F28C3/12—Other direct-contact heat-exchange apparatus one heat-exchange medium at least being a fluent solid, e.g. a particulate material the heat-exchange medium being a particulate material and a gas, vapour, or liquid
    • F28C3/16—Other direct-contact heat-exchange apparatus one heat-exchange medium at least being a fluent solid, e.g. a particulate material the heat-exchange medium being a particulate material and a gas, vapour, or liquid the particulate material forming a bed, e.g. fluidised, on vibratory sieves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D15/00—Handling or treating discharged material; Supports or receiving chambers therefor
    • F27D15/02—Cooling
    • F27D15/0206—Cooling with means to convey the charge
    • F27D15/0213—Cooling with means to convey the charge comprising a cooling grate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D15/00—Handling or treating discharged material; Supports or receiving chambers therefor
    • F27D15/02—Cooling
    • F27D15/0206—Cooling with means to convey the charge
    • F27D15/0213—Cooling with means to convey the charge comprising a cooling grate
    • F27D15/022—Cooling with means to convey the charge comprising a cooling grate grate plates
    • F27D2015/0233—Cooling with means to convey the charge comprising a cooling grate grate plates with gas, e.g. air, supply to the grate

Definitions

  • the present invention relates to a cooler for cooling particulate material which has been heat-treated in an industrial kiln, such as a rotary kiln for manufacturing cement clinker.
  • Such coolers may comprise an inlet end, an outlet end, end walls, side walls, a bottom and a ceiling, at least one supporting surface for supporting the material which is to be cooled, means for injecting cooling gas into the material, and means for conveying the material forward across the supporting surface from the inlet end to the outlet end.
  • An inlet section is fitted in the inlet end for receiving the material from the kiln and for distributing this material on the supporting surface.
  • coolers of this kind are known from the literature. These traditional coolers typically incorporate an inlet section with a fixed so-called “idealized two- dimensional inlet surface", by which is meant that the horizontal generatrices of the inlet surface which extend crosswise of the longitudinal direction of the cooler are parallel and extend over the full width of the cooler inlet.
  • the material, which falls into the cooler from the kiln, is spread on the inlet surface in such a traditional cooler in an approximately parabolic shape, having an apex at the point of impact.
  • the wall lining in the inlet section of such a cooler is therefore typically configured for compatibility with this physical shape.
  • the inlet section is typically formed with an angle of inclination which is less than the natural angle of slide of the clinker, so that during operation a protective layer of stationary clinker is formed on the inlet surface. If, for a given production target, the width of the cooler is extended in order to lower the speed required to operate the means of conveyance and hence to reduce the wear exposure of the moving parts, the consequence thereof is that the length of the inlet section must be increased proportionately in order to ensure a satisfactory transverse distribution of the material in the inlet section.
  • the length of the inlet section is made too long, the result will be too great a thickness of the protective layer of stationary clinker, and, in actual practice, this will have a negative effect on the heat exchange between the clinker and the cooling gas in this zone.
  • This means that the temperature of the cooling gas which is subsequently utilized as combustion air in the kiln is too low, while the clinker being conveyed on the subsequent supporting surface is not cooled sufficiently, thus potentially increasing the thermal loading to which the supporting surface is subjected.
  • a cooler of the kind mentioned in the introduction is characterized in that it comprises, in the inlet section, means for distributing the material which is received from the kiln across the cooler in direction towards the side walls of the cooler
  • the wear rate of the moving parts can be reduced because the velocity of the conveying means can be reduced and, furthermore, the thickness of the protective layer of the stationary clinker on the inlet surface can be better adapted for achieving optimum heat exchange between the clinker and the cooling gas in this zone
  • the means of distribution may be formed in any one of a number of possible ways in order to meet the necessary prerequisite of the material being distributed also in the width direction of the cooler
  • such means comprise an idealized three-dimensional inlet surface, i e a surface which comprises horizontal generatrices or horizontal tangents which are present in at least two different directions, mutually intersecting one another
  • a vertical section of a pyramid or a truncated pyramid the imaginary or undivided base of which consisting of a polygon with an arbitrary number of sides
  • the inlet surface be displaceable reciprocably in the crosswise direction of the cooler
  • the areas immediately ahead of the inlet surface may be provided with adjustable means to achieve a local reduction of the conveying efficiency so that the material will tend to flow towards those areas of the supporting surface of the cooler where the highest degree of conveying efficiency occurs
  • the conveying efficiency reduction means may consist of transverse plates or girders being displaceable in upward and downward directions, substantially through the supporting surface
  • the latter may be of a stepped design and so configured that at least one step can be moved independently of the other steps in a direction which is not parallel to any of the sides of the inlet surface which are of paramount importance in terms of functionality.
  • the cooler may be of the kind which is described in PCT/EP98/02012 the contents of which being hereby considered as being part of the present application
  • the conveying means consist of a reciprocating scraper system which comprises a number of rows of scraper elements extending across the direction of movement of the material, said elements reciprocating in the direction of movement of the material in order to carry the material forward across the supporting surface
  • Fig 1 shows a side view of a first cooler according to the invention
  • Fig 2 shows a sectional view A-A ofthe cooler shown in Fig 1 viewed from above
  • Fig 3 shows a sectional view B-B of the cooler shown in Fig 1 viewed from the outlet end of the cooler
  • Fig 4 shows a sectional view corresponding to that in Fig 2 of a second
  • a cooler 1 which is installed in extension of a rotary kiln 3 for manufacturing cement clinker
  • the cooler comprises an inlet 4, an outlet 5, end walls 6, 7, side walls 8, a bottom 9 and a ceiling 10
  • the cooler also comprises a stationary grate bottom 1 1 which is made up of a number of grate plates 11 a for supporting the cement clinker, a fan 12 for injecting cooling gas up through the clinker via a chamber 13 and the grate bottom 1 1 , and a row of scraper elements 14 which by means of a driving mechanism not shown can be made to reciprocate in the longitudinal direction of the cooler as indicated by the double arrow 15, so that the clinker is carried from the inlet end of the cooler to its outlet end
  • the cooler may be configured with several juxtapositioned rows of scraper elements 14
  • the cooler shown also comprises continuously and automatically operating flow regulators 1 1 b which are installed in the gas supply duct 1 1 c of each grate plate 11 a for regulating the cooling gas flow up through the single grat
  • the cooler also comprises, in the inlet section, means 20 for distributing the material which is received from the kiln 3, crosswise of the cooler in the direction towards the side walls 8 of the cooler
  • the distribution means 20 substantially consists of an idealized three-dimensional inlet surface 20 and, as is best seen from Figs 2 and 3, the latter may consist of a stepped pyramid 20
  • the pyramid 20 is shown with four steps, but in practice it may comprise fewer or more steps
  • the entire pyramid can be displaced backwards and forwards i e reciprocably in the transverse direction of the cooler as indicated by the double arrow 21 , and at least one of the steps may be movable independently of the others as indicated by the double arrow 22
  • the inlet surface 20 may be constructed basically configured as a part-conical surface or truncated cone
  • the cooler shown comprises barrier means in the form of transverse plates 18 each of which extends over a part of the cooler width, and is displaceable up and through the supporting surface
  • the plates 18 are used to achieve a local reduction of the conveying efficiency whereby the material will tend to flow towards the areas of the supporting surface of the cooler where the conveying efficiency is greatest
  • Fig 4 in plan view, an example of an alternative embodiment of the pyramid-like shaped inlet surface 20

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Furnace Details (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)

Abstract

L'invention porte sur un refroidisseur de matériau particulaire (1) ayant subi un traitement thermique dans un four industriel tel qu'un four rotatif (3) pour la fabrication de clinker. Ledit refroidisseur présente une extrémité d'entrée (4), une extrémité de sortie (5), des parois d'extrémité (6,7), des parois latérales (8), un fond (9) et un plafond (10). L'une au moins des surface (11) recevant le matériau à refroidir est munie à la fois de moyens (11a, 12) d'injection de gaz de refroidissement dans le matériau, et de moyens (14) de transfert du matériau vers l'avant en traversant la surface porteuse de l'extrémité d'entrée (4) à l'extrémité de sortie (5). Une section d'entrée (20) disposée dans l'extrémité d'entrée reçoit le matériau provenant du four et le répartit sur la surface porteuse. Un moyen de la section d'entrée (20) distribue le matériau provenant du four dans le refroidisseur en direction de ses parois latérales. On peut ainsi augmenter la largeur du refroidisseur sans devoir agrandir d'autant la section d'entrée, puisque le matériau peut être réparti mieux et plus uniformément y compris dans le sens de la largeur du refroidisseur. Le taux d'usure des parties mobiles est réduit du fait de la moindre vitesse des moyens de transfert, tandis que les échanges thermiques entre le clinker et le gaz de refroidissement dans la zone d'entrée s'améliorent du fait d'une meilleure adaptation de l'épaisseur de la couche de protection du clinker résidant sur la surface d'entrée.
PCT/EP1999/009066 1998-11-25 1999-11-24 Refroidisseur de materiau particulaire Ceased WO2000031483A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU16539/00A AU1653900A (en) 1998-11-25 1999-11-24 Cooler for cooling of particulate material

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DKPA199801550 1998-11-25
DK199801550A DK199801550A (da) 1998-11-25 1998-11-25 Køler til afkøling af partikelformet materiale

Publications (1)

Publication Number Publication Date
WO2000031483A1 true WO2000031483A1 (fr) 2000-06-02

Family

ID=8105975

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1999/009066 Ceased WO2000031483A1 (fr) 1998-11-25 1999-11-24 Refroidisseur de materiau particulaire

Country Status (4)

Country Link
AU (1) AU1653900A (fr)
DK (1) DK199801550A (fr)
TW (1) TW418312B (fr)
WO (1) WO2000031483A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10113516A1 (de) * 2001-03-20 2002-09-26 Bmh Claudius Peters Gmbh Verfahren und Vorrichtung zum Behandeln von Schüttgut
WO2006040610A1 (fr) * 2004-10-13 2006-04-20 F.L. Smidth A/S Refroidisseur pour refroidir un materiau particulaire chaud
CN101957145A (zh) * 2009-07-17 2011-01-26 扬州鹤林环保机械有限公司 一种稳流冷却机
CN103776268A (zh) * 2013-12-30 2014-05-07 内蒙古蒙西鄂尔多斯铝业有限公司 一种粉煤灰氧化铝熟料高温冷却设备

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114556039B (zh) * 2019-10-14 2024-09-17 蒂森克虏伯伯利休斯有限公司 用于冷却散状物料的冷却器和方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1022958B (de) * 1955-04-25 1958-01-16 Polysius Gmbh Vorrichtung zum Kuehlen von Zementklinker oder aehnlichen Stoffen
DE1108606B (de) * 1959-05-06 1961-06-08 Polysius Gmbh Leitvorrichtung zum UEberleiten von gebranntem Gut, insbesondere Zementklinker, aus einem Ofen, z. B. Drehrohrofen, auf einen beweglichen Rostkuehler
US3232416A (en) * 1963-11-29 1966-02-01 Allis Chalmers Mfg Co Distributor for conveyor
DE2452753B1 (de) * 1972-10-26 1976-04-29 Walther & Cie Ag Kühleinrichtung
US4259181A (en) * 1979-04-16 1981-03-31 Cabot Corporation Stream splitter for spreading particulate material
DE3927579A1 (de) * 1989-08-21 1991-02-28 Krupp Polysius Ag Vorrichtung zur kuehlung von heissem feststoffgut
EP0826940A1 (fr) * 1996-08-29 1998-03-04 BMH Claudius Peters AG Procédé pour répartir la charge sur la largeur d'une grille mobile et grille mobile pour son application

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1022958B (de) * 1955-04-25 1958-01-16 Polysius Gmbh Vorrichtung zum Kuehlen von Zementklinker oder aehnlichen Stoffen
DE1108606B (de) * 1959-05-06 1961-06-08 Polysius Gmbh Leitvorrichtung zum UEberleiten von gebranntem Gut, insbesondere Zementklinker, aus einem Ofen, z. B. Drehrohrofen, auf einen beweglichen Rostkuehler
US3232416A (en) * 1963-11-29 1966-02-01 Allis Chalmers Mfg Co Distributor for conveyor
DE2452753B1 (de) * 1972-10-26 1976-04-29 Walther & Cie Ag Kühleinrichtung
US4259181A (en) * 1979-04-16 1981-03-31 Cabot Corporation Stream splitter for spreading particulate material
DE3927579A1 (de) * 1989-08-21 1991-02-28 Krupp Polysius Ag Vorrichtung zur kuehlung von heissem feststoffgut
EP0826940A1 (fr) * 1996-08-29 1998-03-04 BMH Claudius Peters AG Procédé pour répartir la charge sur la largeur d'une grille mobile et grille mobile pour son application

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10113516A1 (de) * 2001-03-20 2002-09-26 Bmh Claudius Peters Gmbh Verfahren und Vorrichtung zum Behandeln von Schüttgut
WO2006040610A1 (fr) * 2004-10-13 2006-04-20 F.L. Smidth A/S Refroidisseur pour refroidir un materiau particulaire chaud
CN101957145A (zh) * 2009-07-17 2011-01-26 扬州鹤林环保机械有限公司 一种稳流冷却机
CN101957145B (zh) * 2009-07-17 2014-02-05 扬州鹤林环保机械有限公司 一种稳流冷却机
CN103776268A (zh) * 2013-12-30 2014-05-07 内蒙古蒙西鄂尔多斯铝业有限公司 一种粉煤灰氧化铝熟料高温冷却设备
CN103776268B (zh) * 2013-12-30 2015-09-30 内蒙古蒙西鄂尔多斯铝业有限公司 一种粉煤灰氧化铝熟料高温冷却设备

Also Published As

Publication number Publication date
TW418312B (en) 2001-01-11
DK199801550A (da) 2000-05-26
AU1653900A (en) 2000-06-13

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