EP0780651B2 - Procédé et dispositif pour empêcher la formation de concrétions dans les refroidisseurs de clinker et pour enlever des composants de revêtement du refroidisseur - Google Patents

Procédé et dispositif pour empêcher la formation de concrétions dans les refroidisseurs de clinker et pour enlever des composants de revêtement du refroidisseur Download PDF

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Publication number
EP0780651B2
EP0780651B2 EP96118789A EP96118789A EP0780651B2 EP 0780651 B2 EP0780651 B2 EP 0780651B2 EP 96118789 A EP96118789 A EP 96118789A EP 96118789 A EP96118789 A EP 96118789A EP 0780651 B2 EP0780651 B2 EP 0780651B2
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EP
European Patent Office
Prior art keywords
grate
cleaning air
air
cooler
clinker
Prior art date
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EP96118789A
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German (de)
English (en)
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EP0780651A1 (fr
EP0780651B1 (fr
Inventor
Mark S. Terry
Oleg Geskin
Herbert Pingel
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ThyssenKrupp Industrial Solutions AG
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Krupp Polysius AG
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Application filed by Krupp Polysius AG filed Critical Krupp Polysius AG
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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
    • F27D25/00—Devices or methods for removing incrustations, e.g. slag, metal deposits, dust; Devices or methods for preventing the adherence of slag
    • F27D25/008—Devices or methods for removing incrustations, e.g. slag, metal deposits, dust; Devices or methods for preventing the adherence of slag using fluids or gases, e.g. blowers, suction units
    • 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
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2400/00—Treatment of slags originating from iron or steel processes
    • C21B2400/02—Physical or chemical treatment of slags
    • C21B2400/022—Methods of cooling or quenching molten slag
    • 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
    • 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
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/16—Introducing a fluid jet or current into the charge

Definitions

  • the invention relates to a method (according to the preamble of claim 1) and a cooler (according to the preamble of claim 5) for cooling of fine material containing hot material.
  • raw materials are usually fired in rotary kilns to produce cement clinker.
  • rotary kilns For example, describes the US-A-5,437,721 a process for producing cement clinker from fine-grained cement raw materials.
  • temperatures of at least 1400 ° C are common.
  • the temperature of the clinker when leaving the kiln is normally about 1350 ° C.
  • the hot clinker from the kiln reaches a grate designed in such a way that it facilitates the supply of cooling air to the clinker. While the clinker is on the radiator inlet grate, it is exposed to cooling air. He then usually gets to a conveyor that transports him to a mill or a grinding plant.
  • cooling grids have already been developed for cooling cement clinker.
  • FIG. 1 shows the US-A-2,434,845 a clinker cooling chamber with a stepped grate device on which the hot clinker passes after leaving the kiln.
  • cooling air is injected through openings through the stepped surface into the clinker buildup.
  • a similar cooling device is in the US-A-4,732,561 discloses that hot material from the furnace, such as clinker, moves by gravity through a step-like series of air-permeable support members. Cooling air is supplied to the material through the support members and can be directed in pulsating bursts to individual support members or to groups of support members.
  • layer regions which have a higher temperature than the surrounding layer zones are additionally cooled and rearranged by pulses of cooling air supplied in pulses.
  • the temperature of the layer surface can be scanned and, accordingly, the supply of cooling air pulses can be controlled as a function of the temperature measured values obtained by the sampling.
  • These impulsively supplied cooling air surges are thus superimposed with the usual cooling air flow, which constantly penetrates the layer transversely to its direction of movement. It should therefore be done by the impulsively supplied cooling air surges for an additional cooling of particularly hot areas ofdegut für and thus a very desirable equalization of the temperature profile transverse to the direction of movement of the layer.
  • the coming from the kiln clinker is usually spherical and has a diameter of about 2.5 to 7.5 cm.
  • fine-grained material also passes from the kiln into the clinker cooler.
  • This fine-grained material can lead to a number of undesirable effects in the clinker cooler. For example, in the cooler, it may adhere to the surfaces of adjacent clinker pieces and cause the clinker to stick together - a process called agglomeration.
  • large pieces of cladding are thrown out of the kiln, broken away from its insides. These large pieces interfere with the efficient transfer of heat within the radiator and interrupt the clinker flow through the radiator.
  • a bigger problem than the clinking of the clinker is the formation of so-called snowmen in the clinker cooler.
  • Snowmen form when fine grain material from the kiln falls down onto the surface of large pieces of kiln cladding on the top layer of the clinker bed in the cooler.
  • snowmen also form on the surface of the clinker, especially when the clinker is caking.
  • one layer of fine-grained material after another settles on a piece of kiln cladding, the snowman "grows" stalagmite-like upward.
  • the pieces of kiln cladding serve as a kind of starting point for the formation of snowmen. If these snowmen are not noticed, they can grow so much that they finally reach the discharge opening of the kiln and thereby prevent the delivery of the clinker from the kiln.
  • Blowing pulsating air blasts through the front wall of the radiator housing or through other refractory walls of the radiator has been found to be effective only partially when it comes to cutting off the tops of the snowmen in the immediate vicinity of the injection ports.
  • the lower areas of the snowmen remain on the clinker bed and are thus starting points for the formation of new snowmen.
  • Pulsating air injected through an opening provided in the front wall of the radiator housing, such as the radiator known from KHD Symposium 1995 ( Figure 8) also has no effect on snowmen or other accumulations closer to the center of the radiator.
  • the invention is therefore an object of the invention to improve a method according to the preamble of claim 1 and a radiator according to the preamble of claim 5 in such a way that the formation of snowmen is prevented by pieces of the kiln lining are removed from the radiator inlet, wherein Snowmen can be removed as soon as they have formed, and can be dispensed with moving parts and the differences in the height of the clinker bed have no influence.
  • hot clinker is preferably supplied to the radiator inlet grate and low pressure cooling air is injected into the clinker, wherein then high pressure air blasts are blown into the clinker bed from the radiator inlet grate over a period of time, approximately horizontally in the direction of clinker flow, to shake and shake the clinker, thereby disintegrating any incipient clumps or agglomerations and all large pieces of kiln cladding from the radiator inlet be transported away.
  • a monitoring of the clinker material within the radiator and a targeted insertion of the cleaning air in selected areas or zones of the radiator inlet grate is provided with certain impact intensities.
  • the cooler according to the invention is characterized in that in the cooler, a high-pressure cleaning air supply system for targeted intermittent supply of cleaning air through cleaning air openings in approximately horizontal direction in at least one grate zone is present and that means for monitoring and detecting the location of any accumulations of fine-grained material and Schneemann gas are provided in such a way that upon detection of such accumulations of material and Schneemann fielden the high-pressure cleaning air to eliminate these accumulations of material and Schneemann fielden is targeted and gradually injected into at least one corresponding grate zone.
  • the radiator according to the invention includes a radiator inlet grate with a stepped surface on which the clinker comes to rest, a low pressure cooling air supply system for supplying cooling air to the clinker, and additionally a separate high pressure purge air supply system for blowing short bursts of high pressure -Cleaning air with certain intensity in the clinker accumulation.
  • a particular advantage of the present invention is thus seen in the fact that an increase of snowmen prevented and large pieces of the kiln lining are removed from the radiator inlet or grille during cooling of cement clinker, with moving parts in the clinker and in the vicinity no longer or only in needed to a very limited extent.
  • the method and apparatus according to the invention enable simple and economical manufacture, assembly and repair.
  • FIG. 1 shows a clinker cooler 20 according to a preferred embodiment of the invention.
  • the clinker cooler 20 is disposed below the kiln outlet 10.
  • hot clinker 12 and fine-grained material 14 coming from a furnace (not shown) are fed to it.
  • the filled in the clinker cooler 20 clinker 12 and the fine-grained material 14 come to rest on a cooler inlet grate 22.
  • the radiator inlet grate 22 is inclined in the direction of the arrow 19 from its upper end 17 to its lower end 18 downward.
  • the inclination of the radiator inlet grate 22 to the horizontal is preferably between 10 and 20 °; in the most preferred embodiment, the radiator inlet grate 22 is inclined at 14 ° to the horizontal.
  • the clinker 12 collects on the radiator inlet grate 22 to a clinker bed, not shown.
  • the clinker layer located directly above the radiator inlet grate 22 usually remains in place and thus forms a protective layer for the radiator grate against the friction and heat caused by the clinker 12 coming from the kiln outlet 10. This layer is commonly referred to as a static clinker bed.
  • the radiator inlet grate 22 comprises a plurality of rows of removable grate plates 24.
  • the grate plates 24 of each row are either directly adjacent to or joined together. Grate plates adjacent rows can, as shown in more detail in Figure 5, also be connected to each other.
  • This grate plate assembly is preferably a modification similar to the embodiment according to FIG US-A-5,322,434 , However, it will be apparent to one of ordinary skill in the art that the present invention can also be used in many other known radiator grate designs.
  • the grate plates 24 carry the clinker as it accumulates, with the clinker usually accumulating at an angle of about 30 to 35 °.
  • the clinker accumulated over the static clinker bed normally moves downwardly in the direction of the arrow 19 along the radiator inlet grate 22.
  • the grate plates 24 are held by grate plate carriers 26, which are arranged stepwise next to each other.
  • the grate plate supports 26 are in turn supported as required by a support frame 50 and the structure 52 adjacent thereto.
  • a grate plate 24 has a vertical grate plate portion 40 and a grate plate base portion 41, thereby forming an approximately L-shaped member.
  • the grate plate 24 is preferably a casting and should have sufficient general strength and wear resistance to support the clinker without the movement of the clinker over the radiator inlet grate leading to excessive bending and wear.
  • the fact that the grate plates 24 are removable facilitates replacement and repair of the radiator inlet grate 22.
  • the vertical grate plate portion 40 is bounded by an upper edge 42 which may abut a lower edge 44 of the adjacent grate plate base 41 so that both overlap that they mesh.
  • the grate plate base portion 41 has at least one grate plate cooling air opening 34 through which cooling air can flow.
  • the grate plate 24 is configured so that it has a ventilation cover 36 above the grate plate cooling air opening 34. This creates an annular cooling air gap 38 between the upper surface of the grate plate base portion 41 and the lower surface of the ventilation cover 36.
  • Cooling air 28 flows at low pressure from a source, not shown, into cooling air duct 30.
  • the term "low pressure" in the present invention refers to a pressure of less than about 13.79 kPa.
  • the cooling air duct 30 has at least one cooling air duct opening 32, through which air can flow.
  • the cooling air duct opening 32 is aligned so that it is aligned with the grate plate cooling air opening 34 when the grate plate rests on the grate plate carrier 26. In this way, for cooling the clinker cooling air 28 from the cooling air duct 30 through the cooling air duct opening 32 and the adjacent grate plate cooling air opening 34 and further passed through the annular cooling air gap 38 and the vent cover 36.
  • the cooling air is preferably at a pressure between about 7.6 and 12.4 kPa, a speed between about 18.3 and 39.6 m / s and a flow rate between about 0.028 and 0.06 m 3 / s per plate opening, these values normally depending on the volume and type of clinker to be cooled and on the temperature at which the clinker leaves the kiln.
  • a grate plate carrier 26 are preferably hollow carrier with square or rectangular cross section use (see Figure 4).
  • the grate plate supports 26 can simultaneously serve as a cooling air duct 30. Instead, however, separate components can be used, wherein the cooling air line 30 then consists of tubes that lie within a support frame, which serves as a grate plate carrier 26.
  • the grate plate carrier 26 are arranged in steps and supported by the support frame 50.
  • Each step-like grate plate carrier further comprises a bearing surface 56 at its upper end and a riser 58, which forms the vertical outer side of the stepped grate plate carrier 26.
  • the clinker cooler according to the invention further has a high-pressure cleaning air system, which will be described in more detail below.
  • a pressure of over 345 kPa is referred to as "high pressure”.
  • at least one compressed air gun 60 supplies cleaning air to the clinker cooler cleaning air system.
  • the compressed air guns 60 deliver short bursts (with a duration of preferably about 0.5 to 1.2 sec., In the particularly preferred embodiment of about 0.7 sec.) Of high-speed compressed air to the cleaning air system.
  • the cleaning air blasts supplied by the compressed air cannons 60 according to the invention are switched on and off at short notice, which makes it possible to trigger vibrations and jarring of the clinker, while in conventional coolers "pulsating" cooling air is supplied, wherein the pressure of the clinker directed cooling air can be varied. But shaking or shaking the clinker is not possible.
  • An example of a suitable compressed air gun is the Martin BB4-24-48.
  • Cleaning air from the compressed air guns 60 is supplied through cleaning air supply lines 62.
  • Cleaning air supply valves 64 may be provided in the cleaning air supply pipes 62.
  • Compressed air guns 60 are preferably operated remotely via pneumatic or electrical control devices, for example via the compressed air cannon remote condition control element 66th
  • cleaning air from the compressed air guns 60 flows through a cleaning air supply line 68 into the cleaning air chamber 70.
  • the cleaning air chamber 70 is preferably formed by fixing an angle iron 72 of a certain length on the inner surface of the riser 58 of the grate plate carrier 26 (see FIG. ,
  • the angle iron cleaning air chamber is preferably fixed by a continuous weld - and thus airtight - on the grate plate support member.
  • At intervals 58 leading cleaning air chamber openings 74 are provided by the riser, through which the cleaning air can flow.
  • cleaning air openings 76 are provided, which are for example slit-shaped and aligned with the makes Kunststoffschmündungen 74 so that the cleaning air from the cleaning air chamber 70 in the direction of arrow 78 can flow into the clinker accumulation.
  • the cleaning air holes 76 By arranging the cleaning air holes 76 so that the cleaning air flows substantially in the horizontal direction, the cleaning air blast is almost entirely applied to the clinker buildup, whereby any snow man's accumulation can be effectively removed.
  • a horizontal orientation of the cleaning air ports 76 helps the static clinker bed move along the radiator inlet grate.
  • the cleaning air openings 76 are preferably about 7.5 cm wide and 1.25 cm high, and there are two cleaning air openings on each of the grate plates 24, where cleaning air is supplied.
  • the cleaning air delivery system described above should allow, in short bursts, high pressure cleaning air of between at least about 345 and 690 kPa, a velocity of between at least 100 and 200 m / sec, and a flow rate of between at least about 1.13 and 1.7 to supply m 3 / sec.
  • high pressure cleaning air of between at least about 345 and 690 kPa
  • a velocity of between at least 100 and 200 m / sec a velocity of between at least 100 and 200 m / sec
  • a flow rate of between at least about 1.13 and 1.7 to supply m 3 / sec.
  • a variety of different compressed air cannons are commercially available, which make it possible to supply cleaning air in accordance with these parameters in a suitable manner.
  • the compressed air cannon control element 66 allows actuation of the compressed air guns 60 by remote control for the targeted supply of cleaning air.
  • the radiator inlet grate can be further subdivided, whereby cleaning air can be directed into certain zones of the radiator inlet grate 22.
  • cleaning air can optionally be blown into one of the eight zones corresponding to the individual compressed air guns 60, four of which are on the left and four on the right of the center line 69.
  • the cleaning air chamber 70 may extend from one side of the radiator inlet grate 22 to the other side without interruption, or it may be provided with removable air shutters or valves that allow partitioning of the purge air chamber into any number of zones.
  • each grate plate 24 cleaning air openings 76; However, this is not absolutely necessary.
  • cleaning air openings 76 may be provided only at certain grate plates 24 to permit purge air blows as required to remove any accumulations of fine-grained material within the radiator.
  • the arrangement of these grate plates is necessarily different and depends on various factors such as the structure and size of the radiator inlet grate 22.
  • the strength of the cleaning air blasts can be adjusted in a targeted manner. For example, if all the grate plates 24 are provided with cleaning air openings 76, the cleaning air is distributed by the compressed air guns approximately uniformly over the width of the radiator inlet grate 22. With this arrangement, the intensity of the cleaning air blast supplied through each of the cleaning air ports 76 is minimized. If only half of the grate plates 24 are provided with cleaning air ports 76, the intensity of the compressed air blast supplied by each cleaning air port is approximately twice the aforementioned minimum intensity. On the other hand, the intensity of the cleaning air blast through a cleaning air opening is highest when only one grate plate 24 is provided with a cleaning air opening 76.
  • valves it is also possible to vary the intensity of the cleaning air blast supplied to the clinker by the targeted use of valves as desired.
  • at least one compressed air gun could be used to apply cleaning air to provide a common distribution system, from which more than one cleaning air line is supplied.
  • purge air might flow to a purge air supply line or to a plurality of purge air supply lines, with a smaller number of conduits causing a higher intensity of purge air surge provided.
  • monitoring devices such as an infrared camera 90
  • a conventional loop video camera or even a window or viewing port may be provided as a monitoring device.
  • the operator can monitor the clinker cooler from another location. When formation of snowmen is observed, the operator can systematically inject, with the aid of the remotely controlled purge air control element 66, purge air surges into the zone of the radiator inlet grate in which the accumulation has been observed.
  • mechanical or electronic control means or a timer may also be provided for sequentially or randomly blowing cleaning air blasts into the various zones of the radiator inlet grate 22.
  • the material coming from the kiln comprising clinker 12 and fine-grained material 14, is poured onto the radiator inlet grate 22 and then transported along the grate approximately in the direction of the arrow 19.
  • the clinker moves along the radiator inlet grate, it is cooled by the low pressure cooling air 28 supplied to it in the manner described above.
  • the operator can generally monitor the transport of the clinker to determine if snowmen are forming. If such formations are observed, the operating personnel can use the remote-controlled compressed air gun control element 66 to blow targeted high-pressure cleaning air pulses into the appropriate zone of the radiator inlet grate 22. These cleaning air surges are discharged through openings in the riser sections of the stepped cooler inlet grate 22.
  • the cleaning air usually flows horizontally from the radiator inlet grate to the grate level in the direction of the clinker flow.
  • the puffs of air are sufficiently intense to shake the clinker so that the clinker bed is no longer stable and overturn any snowmen that may have arisen and slide down the slope of the clinker bed, causing the snowmen to break.
  • the direction of the cleaning air as well as their respective Einblasstelle positively influence the flow of the static clinker bed.
  • the purging air blows at the level of the grate, the air expands as it warms as it flows through the hot clinker bed, increasing the intensity of the puff of air.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Furnace Details (AREA)

Claims (13)

  1. Procédé pour refroidir un matériau chaud, contenant un matériau à grains fins (14), dans un refroidisseur (20), dans lequel le matériau chaud est amené sur une grille d'entrée du refroidisseur (22) dans le refroidisseur (20), et de l'air de refroidissement (28) provenant d'un système d'amenée d'air de refroidissement basse pression est introduit, par le biais d'ouvertures pour le passage de l'air de refroidissement, pour refroidir le matériau dans le refroidisseur (20), et dans lequel de l'air comprimé peut être injecté en outre de façon impulsionnelle dans le matériau, dans au moins une zone pouvant être sélectionnée de la grille,
    caractérisé en ce que
    a) on vérifie si le matériau à l'intérieur du refroidisseur (20) comporte ou non d'éventuelles accumulations du matériau fin et des formations de concrétions, et
    b) en ce que la grille d'entrée du refroidisseur (22) possède une surface étagée qui contient au moins une surface d'application (56) et au moins une partie étagée de positionnement (58), les ouvertures pour le passage de l'air de refroidissement (34) étant prévues dans la surface d'application (56) et les ouvertures pour le passage de l'air de nettoyage (76) étant prévues dans la partie étagée de positionnement (58), et l'air de nettoyage étant injecté d'une manière ciblée et impulsionnelle à partir d'un système d'amenée d'air de nettoyage à haute pression, possédant une pression supérieure à 345 kPa, par le biais des ouvertures pour le passage d'air de nettoyage (76), dans une direction approximativement horizontale, dans au moins une zone de la grille qui contient d'éventuelles accumulations et d'éventuelles formations de concrétions, pour l'élimination de telles accumulations et de telles formations de concrétions.
  2. Procédé selon la revendication 1, caractérisé en ce que l'air de nettoyage est envoyé, de façon impulsionnelle selon des impulsions d'une durée de moins de 1 seconde avec une pression comprise entre environ 345 et 690 kPa, et une vitesse comprise entre environ 100 et 200 m/s et un débit d'écoulement compris entre environ 1,13 et 1,7 m3/s.
  3. Procédé selon la revendication 1, caractérisé en ce que l'on modifie de façon ciblée l'intensité avec laquelle l'air de nettoyage est injecté dans les zones de la grille.
  4. Procédé selon la revendication 1, caractérisé en ce que l'envoi d'air de nettoyage dans au moins une zone de la grille (22) est contrôlé à l'aide de moyens de commande temporelle.
  5. Refroidisseur pour refroidir un matériau chaud contenant un matériau à grains fins (14), comportant
    a) une grille d'entrée du refroidisseur (22), qui est agencée de manière à supporter le matériau (12, 14) et qui est pourvue d'ouvertures pour le passage de l'air de refroidissement (34),
    b) un système d'amenée de l'air de refroidissement à basse pression pour amener de l'air de refroidissement (28) aux ouvertures pour le passage de l'air de refroidissement (34),
    c) un système d'amenée d'air comprimé pour l'amenée impulsionnelle supplémentaire d'air comprimé dans au moins une zone pouvant être choisie de la grille,
    caractérisé en ce que
    d) la grille d'entrée du refroidisseur (22) possède une surface étagée qui contient au moins une surface d'application (56) et au moins une partie étagée de positionnement (58),
    e) les ouvertures pour le passage de l'air de refroidissement (34) sont prévues dans la surface d'application (56) et les ouvertures pour le passage de l'air de nettoyage (76) sont prévues dans la partie étagée de positionnement (58),
    f) dans le refroidisseur (20), il est prévu un système d'amenée d'air de nettoyage à haute pression servant à réaliser l'amenée impulsionnelle ciblée de l'air de nettoyage avec une pression supérieure à 345 kPa par des ouvertures pour le passage de l'air de nettoyage (76), dans une direction approximativement horizontale, dans au moins une zone de la grille, et
    g) des moyens (90) pour contrôler et détecter la position d'éventuelles accumulations d'un matériau à grains fins et de formations de concrétions sont prévus de telle sorte que, dans le cas de la détermination de l'existence de telles accumulations de matériau et de telles formations de concrétions, l'air de nettoyage à haute pression pour éliminer ces accumulations de matériau et ces formations de concrétions peut être injecté de façon ciblée et impulsionnelle dans au moins une zone correspondante de la grille.
  6. Refroidisseur selon la revendication 5, caractérisé en ce que la grille d'entrée du refroidisseur (22) comprend une multiplicité de plaques de grille amovibles (24).
  7. Refroidisseur selon la revendication 5, caractérisé en ce que le système d'amenée d'air de nettoyage à haute pression contient au moins un canon à air comprimé (60).
  8. Refroidisseur selon la revendication 7, caractérisé par un agencement tel de ce canon à air comprimé (60), que l'air de nettoyage peut être envoyé aux ouvertures pour le passage de l'air de nettoyage (76) sous la forme d'impulsions ayant une durée inférieure à 1 seconde, à une pression comprise entre au moins 345 et 690 kPa, une vitesse comprise entre environ 100 et 200 m/s et un débit d'écoulement compris entre environ 1,13 et 1,7 m3/s.
  9. Refroidisseur selon la revendication 7, caractérisé en ce que la grille d'entrée du refroidisseur (22) est divisée en au moins deux zones et en ce que le système d'amenée d'air de nettoyage à haute pression comporte un nombre de canalisations d'amenée d'air de nettoyage (62, 68), dont chacune est reliée selon une liaison de guidage à l'une de ces zones.
  10. Refroidisseur selon la revendication 9, caractérisé en ce que le canon à air comprimé (60) peut être télécommandé pour l'amenée d'air de nettoyage dans au moins l'une de ces zones.
  11. Refroidisseur selon la revendication 9, caractérisé en ce qu'un moyen de commande temporelle est prévu pour actionner le canon à air comprimé (60) pour l'envoi d'air de nettoyage dans au moins l'une des zones.
  12. Refroidisseur selon la revendication 9, caractérisé en ce que les intensités des impulsions d'envoi d'air de nettoyage peuvent être modifiées de façon ciblée par modification du nombre des ouvertures pour le passage de l'air de nettoyage (76).
  13. Refroidisseur selon la revendication 5, caractérisé par des moyens pour séparer le système d'amenée d'air de nettoyage à haute pression en au moins deux zones, de telle sorte que les impulsions d'air de nettoyage peuvent être introduites uniquement dans les zones dans lesquelles les accumulations du matériau à grains fins (14) ont été détectées.
EP96118789A 1995-12-15 1996-11-22 Procédé et dispositif pour empêcher la formation de concrétions dans les refroidisseurs de clinker et pour enlever des composants de revêtement du refroidisseur Expired - Lifetime EP0780651B2 (fr)

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US57322295A 1995-12-15 1995-12-15
US573222 1995-12-15

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EP0780651A1 EP0780651A1 (fr) 1997-06-25
EP0780651B1 EP0780651B1 (fr) 2002-08-21
EP0780651B2 true EP0780651B2 (fr) 2008-01-02

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US (1) US5871348A (fr)
EP (1) EP0780651B2 (fr)
BR (1) BR9605767A (fr)
DE (1) DE59609573D1 (fr)
ES (1) ES2180686T5 (fr)
ZA (1) ZA969708B (fr)

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JP2009536258A (ja) * 2006-05-05 2009-10-08 プラスコエナジー アイピー ホールデイングス，エス．エル．，ビルバオ，シャフハウゼン ブランチ プラズマトーチ熱を使用したガス改質システム
BRPI0711329A2 (pt) * 2006-05-05 2011-08-30 Plascoenergy Ip Holdings S L Bilbao Schaffhausen Branch Gaseificador orientado horizontalmente com sistema de transferência lateral
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EP0780651A1 (fr) 1997-06-25
BR9605767A (pt) 1998-08-25
MX9606448A (es) 1997-10-31
US5871348A (en) 1999-02-16
DE59609573D1 (de) 2002-09-26
ES2180686T3 (es) 2003-02-16
ES2180686T5 (es) 2008-08-01
EP0780651B1 (fr) 2002-08-21
ZA969708B (en) 1997-06-20

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