EP0685697A1 - Refroidisseur à grille - Google Patents

Refroidisseur à grille Download PDF

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Publication number
EP0685697A1
EP0685697A1 EP95105142A EP95105142A EP0685697A1 EP 0685697 A1 EP0685697 A1 EP 0685697A1 EP 95105142 A EP95105142 A EP 95105142A EP 95105142 A EP95105142 A EP 95105142A EP 0685697 A1 EP0685697 A1 EP 0685697A1
Authority
EP
European Patent Office
Prior art keywords
chamber
grate
conveyor
conveying
chambers
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.)
Withdrawn
Application number
EP95105142A
Other languages
German (de)
English (en)
Inventor
Jörg Dipl.-Ing. Speckmann
Jörg Wüstner
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.)
ThyssenKrupp Industrial Solutions AG
Original Assignee
Krupp Polysius AG
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 Krupp Polysius AG filed Critical Krupp Polysius AG
Publication of EP0685697A1 publication Critical patent/EP0685697A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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

Definitions

  • the invention relates to a grate cooler for cooling hot goods, according to the preamble of claim 1.
  • Grate coolers of the required type are known in practice in various designs, for example in the form of a sliding grate cooler for cooling hot cement clinker or the like coming from an oven.
  • the material to be cooled falls onto a grate surface and is transported there by movable grate plates in the longitudinal direction of the grate, whereby the bottom of the grate cooling gas, in particular cooling air, is passed through the material layer, whereby heat energy for the burning process of the material is recovered at the same time.
  • the grate surface is essentially formed by correspondingly arranged grate plates provided with gas passage openings.
  • the space below the grate surface is So the cooler base with so-called sealing air in the form of compressed air.
  • the space below the grate surface is divided into a number of chambers arranged one behind the other in the grate longitudinal direction.
  • the invention is therefore based on the object of providing a grate cooler of the type required in the preamble of claim 1, by which, if necessary, additional cooling of the grate droppings and a relatively low thermal load and reliable sealing of removal devices Adaptable delivery of accumulated rust diarrhea from the chambers is made possible in accordance with the respective requirements.
  • each other chamber is assigned a separate removal device for grate throughput.
  • n - 1 discharge devices are provided which, since they essentially only contain the grate throughput of one chamber (exit chamber in relation to the discharge device) convey away or convey further, only have to be dimensioned relatively small.
  • Each discharge device is arranged with its good receiving end in the lower part of the associated chamber and is led out of this chamber in a sealed manner by a good accumulation device; in doing so, it passes through at least part of the last chamber mentioned above with its delivery end when the execution is open, this delivery end leading at least to a delivery device of this last chamber.
  • Convey grate diarrhea that has been taken up into this last chamber and convey it through this last chamber to the material discharge device and, on the other hand, also convey at least a partial amount of the grate diarrhea material that accumulates in this last chamber into the material discharge device.
  • the solution according to the invention thus also offers the advantage of a function-related, demand-oriented removal of rust diarrhea, so that each chamber, with the exception of the last chamber mentioned, can be emptied individually depending on the local amount of grate diarrhea and thereby safely sealed to the neighboring chambers regardless of the total number of chambers.
  • the lower parts of the chamber there is also a correspondingly long dwell time for the grate dropping material, which leads to an additional cooling of this material and an additional recovery of thermal energy.
  • the longitudinal sections located in these lower chamber parts in particular the material receiving ends of the discharge devices in the accumulated grate diarrhea, can be protected against freshly falling hot grate diarrhea, as a result of which they are subjected to a relatively low thermal load.
  • Another advantage is that overheating of components below the grate surface or in the cooler substructure can be largely ruled out by hot cooling air flowing back.
  • the discharge devices are each formed by a drag chain conveyor with a lower conveyor run and an upper return run running at a distance above it, with at least the return run of each conveyor in the longitudinal section between the respective associated chamber (exit chamber) and the last chamber has a gas- and dust-tight sheathing and wherein sheathed longitudinal sections of at least one conveyor are partially passed through the lower part of at least one other chamber.
  • a grate cooler illustrated in the drawing, it is assumed that it is intended for cooling hot cement clinker 1, which - as indicated by arrow 2 - is thrown out of a kiln (not shown in more detail) (e.g. rotary kiln).
  • a kiln not shown in more detail
  • other hot material e.g. burnt lime, ore material or the like
  • This grate cooler contains a grate surface 4, which takes up the hot cement clinker 1 approximately in one layer and conveys it in the direction of arrow 3, which is formed in a manner known per se by grate plates provided with cooling air passage openings, as is the case in 5 in the left section of the grate surface 4 in 1 are indicated schematically; With the help of these grate plates 5, for example, a sliding grate can be formed. Of course, other grate designs are also possible.
  • a number of chambers 6, 7, 8, 9 arranged one behind the other in the longitudinal direction of the grate are formed directly below this grate surface 4 such that they are separately - as indicated by dashed arrows 10 - with sealing air in the form can be acted upon by compressed air.
  • This supply of sealing air is necessary so that the from the grate surface Exiting and the hot clinker 1 quickly heated cooling air does not flow through existing gaps in the cooler base below the grate surface 4 and can cause damage there.
  • the grate substructure is divided into the above-mentioned chambers 6, 7, 8, 9, that is to say in this example into four chambers.
  • cement clinker 1 When the goods to be cooled (cement clinker 1) are being transported over the grate surface 4, it cannot be avoided that dust and fine particles of the goods fall down through the grate.
  • This rusting material is received or collected in the lower parts 6a, 7a, 8a and 9a of the chambers 6 to 9 and conveyed to a material discharge device 11, which is provided on the bottom of a last chamber in the longitudinal direction of the grate, which in the present example is also the last chamber 9 acts in the direction of material conveyance (arrow 3).
  • a material discharge device 11 which is provided on the bottom of a last chamber in the longitudinal direction of the grate, which in the present example is also the last chamber 9 acts in the direction of material conveyance (arrow 3).
  • each other Chamber 6, 7, 8 is assigned a separate removal device for grate throughput.
  • each of these mechanical removal devices is formed by a drag chain conveyor 12, 13 or 14.
  • These drag chain conveyors 12, 13, 14 are each arranged with their goods receiving end 12b, 13b, 14b in the lower part 6a, 7a, 8a of the associated chamber 6, 7, 8 and each lead out of their associated chamber in a sealed manner by a product accumulation device 15 (to this product accumulation device 15 will be discussed in more detail later with reference to Figure 4).
  • these drag chain conveyors 12, 13, 14 penetrate at least part of the last chamber 9 mentioned in an open construction, as is indicated in FIGS. 1 and 2.
  • Each delivery end 12c, 13c, 14c is at least as far as the delivery device 11 of this last chamber 9.
  • the drag chain conveyors 12, 13, 14, which are essentially designed in a manner known per se, accordingly have endlessly rotating drag chains (conveyor chains) with a lower conveyor run 19 and one with drive or deflection wheels 16, 17 in the direction of the arrows 18 (FIG. 1) Distance above the upper return run 20.
  • At least the return run 20 of each drag chain conveyor 12, 13, 14 has a relatively narrow gas and dust-tight casing 22 between the respective associated chamber or exit chamber 6, 7 or 8 and the last chamber 9 , while with the conveyor runs 19, which usually run in channels, a relatively simple cover 21 will generally suffice, especially since the filling there ensures an adequate seal; this is in Figures 1 and 3 for the Drag chain conveyor 12 indicated.
  • the upper return run 20 can, like in the last chamber 9, run open, ie not encased.
  • the covered longitudinal sections of at least the return run 20 of a conveyor are partially passed through the lower part of at least one other chamber (see FIG. 3). If, for example, the drag chain conveyor 12 belonging to the chamber 6 in FIGS. 1, 2 and 3 is considered in this context, then at least its return run 20 extends within the associated casing 22 through the intermediate chambers 7 and 8, so that this drag chain conveyor 12 no gas or dust connection between the chamber 6 on the one hand and the chambers 7, 8 on the other hand can be established.
  • the drag chain conveyor 12, 13 and 14 of each chamber 6, 7, 8 is gas between the corresponding chamber outlet wall 6b, 7b, 8b and its open longitudinal section or delivery end 12c, 13c, 14c within the last chamber 9 in the manner mentioned. and guided dustproof.
  • each chamber 6, 7, 8 provided with a conveying device 12, 13, 14 narrows downward to a funnel-shaped gutter channel 6c, 7c, 8c formed on the bottom.
  • Each crop collecting trough 6c, 7c, 8c runs in the longitudinal direction of the grate (cf. FIG. 2), whereby - as can be seen in FIGS or 14 runs along.
  • all drag chain conveyors 12, 13, 14 run parallel and at a distance - viewed in cross section of the grate cooler, that is to say corresponding to FIG. 3 (and possibly FIG.
  • This discharge device 11 can also be designed in any suitable manner; in Figure 1 it is illustrated for the sake of simplicity in the form of a good discharge funnel with a gas-tight closure member.
  • All drag chain conveyors 12, 13, 14 can - as indicated in FIG. 1 only with the conveyor 12 - be driven intermittently and / or with a variable conveying speed by means of a separate drive device 23, so that depending on the amount of rusting material occurring in the individual chambers this diarrhea can be removed in a targeted and demand-oriented manner.
  • this grate cooler has a good accumulation device 15, which is illustrated in detail in FIG.
  • This material accumulation device 15 of each chamber 6, 7, 8 is provided with a wiping element 24 formed on the associated chamber outlet wall, for example 6b in FIGS. 1 and 4, which thus the conveyor run 19 of the associated drag chain conveyor 12 is narrowed approximately to the cross section of this drag chain conveyor 12.
  • This scraper element can be designed, for example, in the form of a scraper strip or - as illustrated in the example in FIG.
  • scraper plate 24 in the form of a scraper plate 24, which ends with a bevel 24a pointing in the conveying direction (arrow 18).
  • This scraper plate 24 is expediently shaped in such a way that in the area in front of its bend 24a, which is designed in the manner of a scraper strip, an accumulation channel 25 which tapers approximately in the conveying direction (arrow 18) to the conveying cross section or remains constant in the conveying direction is formed.
  • each chamber lower part 6a, 7a, 8a is assigned a monitoring device 26 which controls a minimum fill level of residual diarrhea and which is connected to the associated drag chain conveyor 12, 13, 14 and the respective associated drive device 23 is in control connection.
  • This fill level monitoring device 26 and control connection are intended to ensure that there is always a sufficient minimum fill level of rust material in the chamber bottom parts 6a, 7a, 8a mentioned above, so that in the area of the stowage device 15 there is always a sufficient amount of accumulated material for a reliable seal at the outlet of the conveyor run 19 from the associated chamber is present.
  • any other number of chambers can also be provided in this cooler substructure, but in each case, in turn, all chambers except for the one chamber arranged at one longitudinal end and provided with a material discharge device in the one explained Way is provided with a separate discharge device for rust material and all discharge devices openly pass through or end in the last chamber.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Furnace Details (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
EP95105142A 1994-05-05 1995-04-05 Refroidisseur à grille Withdrawn EP0685697A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19944415957 DE4415957A1 (de) 1994-05-05 1994-05-05 Rostkühler
DE4415957 1994-05-05

Publications (1)

Publication Number Publication Date
EP0685697A1 true EP0685697A1 (fr) 1995-12-06

Family

ID=6517423

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95105142A Withdrawn EP0685697A1 (fr) 1994-05-05 1995-04-05 Refroidisseur à grille

Country Status (2)

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EP (1) EP0685697A1 (fr)
DE (1) DE4415957A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115031541A (zh) * 2022-08-10 2022-09-09 泽州县金秋铸造有限责任公司 升降式竖冷窑冷却机构

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1062562A (fr) * 1951-01-30 1954-04-26 Smidth & Co As F L Procédé et appareil de traitement d'une couche mouvante de matières telles que des clinkers, au moyen d'un gaz
DE1170307B (de) * 1963-01-24 1964-05-14 Peters Ag Claudius Rostkuehler fuer Zementklinker od. dgl. und Verfahren zu seinem Betrieb
DE1941345A1 (de) * 1969-08-14 1971-02-25 Peters Ag Claudius Klinkerkuehler
FR2217651A1 (fr) * 1973-02-14 1974-09-06 Peters Ag Claudius
US4624636A (en) * 1984-04-05 1986-11-25 Fuller Company Two stage material cooler
DE4310849A1 (de) * 1993-04-02 1994-10-06 Kloeckner Humboldt Deutz Ag Verfahren zum geregelten Austrag des bei einem Rostkühler durch den Rost nach unten fallenden staubförmigen Gutmaterials

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT182668B (de) * 1953-09-15 1955-07-25 Walter Dipl Ing Poech Vorrichtung zum Vorwärmen, Trocknen und Entsäuern des einem Drehofen zuzuführenden Gutes
SU687893A1 (ru) * 1977-10-21 1989-04-23 Предприятие П/Я А-7896 Колосниковый холодильник дл охлаждени сыпучего материала
SU1455196A1 (ru) * 1986-10-02 1989-01-30 Всесоюзный научно-исследовательский и проектный институт алюминиевой, магниевой и электродной промышленности Колосниковый холодильник

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1062562A (fr) * 1951-01-30 1954-04-26 Smidth & Co As F L Procédé et appareil de traitement d'une couche mouvante de matières telles que des clinkers, au moyen d'un gaz
DE1170307B (de) * 1963-01-24 1964-05-14 Peters Ag Claudius Rostkuehler fuer Zementklinker od. dgl. und Verfahren zu seinem Betrieb
DE1941345A1 (de) * 1969-08-14 1971-02-25 Peters Ag Claudius Klinkerkuehler
FR2217651A1 (fr) * 1973-02-14 1974-09-06 Peters Ag Claudius
US4624636A (en) * 1984-04-05 1986-11-25 Fuller Company Two stage material cooler
DE4310849A1 (de) * 1993-04-02 1994-10-06 Kloeckner Humboldt Deutz Ag Verfahren zum geregelten Austrag des bei einem Rostkühler durch den Rost nach unten fallenden staubförmigen Gutmaterials

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Publication number Publication date
DE4415957A1 (de) 1995-11-09

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