EP0235808A1 - Cooler grid plate - Google Patents

Cooler grid plate Download PDF

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Publication number
EP0235808A1
EP0235808A1 EP87103073A EP87103073A EP0235808A1 EP 0235808 A1 EP0235808 A1 EP 0235808A1 EP 87103073 A EP87103073 A EP 87103073A EP 87103073 A EP87103073 A EP 87103073A EP 0235808 A1 EP0235808 A1 EP 0235808A1
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EP
European Patent Office
Prior art keywords
plate
ribs
grate
air passage
underside
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Withdrawn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
EP87103073A
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German (de)
French (fr)
Inventor
Günther Koeberer
Hans-Jürgen Ubert
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.)
Claudius Peters AG
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Claudius Peters 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 Claudius Peters AG filed Critical Claudius Peters AG
Publication of EP0235808A1 publication Critical patent/EP0235808A1/en
Withdrawn legal-status Critical Current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

Definitions

  • the invention relates to a radiator grille plate with air passage openings and ribs on the underside.
  • Grate coolers are used to cool hot goods, such as fired cement clinker. They consist of a large number of grate plates arranged in rows, the refrigerated goods being pushed on the grate through the cooler by moving every second row of grate plates back and forth.
  • the grate plates are subjected to high mechanical and thermal stresses, particularly in the first cooling zone, in which the refrigerated goods are thrown out of an oven.
  • the refrigerated goods are cooled by cooling air which is fed in under the grate of the cooler and enters the refrigerated goods evenly distributed through the air passage openings of the grate plates. This cooling air also has the Task to cool the grate plates.
  • the known plate has the disadvantage that a particularly high, grooved surface wear occurs in the direction of thrust behind the air passage slots. Furthermore, it is known to provide ribs on the top of the plate, through which part of the refrigerated goods is held to form a protective layer.
  • the invention has for its object to provide a grille plate of the type mentioned, which is thermally and mechanically stronger.
  • the solution according to the invention consists in that at least a plurality of air passage openings are arranged in the ribs. These ribs can be the reinforcing ribs. According to a further feature of the invention, rows of air passage openings lying one behind the other in the thrust direction of the plates can be located in rib-shaped wear thickenings.
  • the invention enables an approximately uniform distribution of the air passage openings over the entire plate surface and nevertheless an intensive heat exchange between the plate and the cooling air flow.
  • the large outer surface of the fin which was previously considered particularly important, is losing importance for heat exchange because it is only touched to a lesser extent by the cooling air flow; but since the inner surface of the air passage openings is increased by their arrangement in the ribs and because the high flow velocity in the air passage openings means that the heat transfer coefficient there is significantly higher than on the outer surface of the ribs in a conventional design, the measure according to the invention can be an overall much better and more uniform Achieve cooling of the plate.
  • the thermal stresses are also reduced because the entire plate is cooled more evenly. Since the cooling of the entire plate is improved without mechanical disadvantages or disadvantages in the cooling air distribution, the thermal load on the plates can be increased without the plate temperature rising above the permissible values.
  • the grate plate can have at least one longitudinal rib extending through to the underside of the plate to the side of the fastening members.
  • a longitudinal rib is expediently provided near the two longitudinal sides of the plate.
  • a transverse rib extending to the underside of the plate can be provided near the rear end face of the plate and near the fastening members.
  • the additional ribs give the plate greater inherent rigidity and an enlarged surface for cooling the plate, regardless of whether these ribs are designed with or without air passage openings. They can also be used to seal the gap between the grate and the stationary walls underneath it, which are used to separate ventilation chambers that can be acted on separately.
  • the front, exposed section of the plate 1 contains a plurality of air passage openings 2, 3 in approximately uniform distribution.
  • the rear panel area which appears on the left in the figure, contains no air passage openings because it is essentially covered by the next row of panels.
  • the remaining air passage openings are arranged in longitudinal rows, which are arranged in rib-like, longitudinally extending thickenings 6, which form a wear reserve for the expected rib-shaped wear in the region of the opening rows.
  • a transverse rib 7 is arranged on the rear end near the fastening elements 4, which extends over the entire width of the plate and whose boundary edge lies in the plane delimiting the plate on the underside.
  • continuous ribs 8 are provided on the long sides of the panel over the entire length of the panel, the lower edges of which likewise lie almost in the plane mentioned.
  • chambers are arranged under the grate, which can be supplied with cooling air separately. While it has so far been difficult to seal the grate longitudinally and transversely against the walls of this chamber, since this area is exposed to high temperatures and is difficult to access, the additional ribs 7 and 8, which extend sufficiently deep to the underside of the plate, provide a gap seal possible between the respective plate rib and the chamber wall with simple means. The better sealing of the chambers to the grate saves cooling air and achieves better cooling and recuperation efficiency.

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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)

Abstract

Cooler grid plate (1) with air penetration openings (2, 3) and underside ribs (5). To improve plate cooling, at least some of the air penetration openings (3) are arranged in the ribs (5) which can be designed as reinforcement ribs and/or wear thickenings running in the longitudinal direction.

Description

Die Erfindung bezieht sich auf eine Kühlerrostplatte mit Luftdurchtrittsöffnungen und unterseitigen Rippen.The invention relates to a radiator grille plate with air passage openings and ribs on the underside.

Rostkühler werden zum Kühlen heißen Guts, beispielsweise ge­brannten Zementklinkers, eingesetzt. Sie bestehen aus einer Vielzahl von reihenweise angeordneten Rostplatten, wobei durch Hin- und Herbewegung jeder zweiten Rostplattenreihe das Kühl­gut auf dem Rost durch den Kühler geschoben wird. Die Rost­platten werden mechanisch und thermisch hoch beansprucht, insbesondere in der ersten Kühlzone, auf der das Kühlgut aus einem Ofen abgeworfen wird. Gekühlt wird das Kühlgut durch Kühlluft, die unter dem Rost des Kühlers aufgegeben wird und durch die Luftdurchtrittsöffnungen der Rostplatten gleichmäßig verteilt in das Kühlgut eintritt. Diese Kühlluft hat auch die Aufgabe, die Rostplatten zu kühlen.Grate coolers are used to cool hot goods, such as fired cement clinker. They consist of a large number of grate plates arranged in rows, the refrigerated goods being pushed on the grate through the cooler by moving every second row of grate plates back and forth. The grate plates are subjected to high mechanical and thermal stresses, particularly in the first cooling zone, in which the refrigerated goods are thrown out of an oven. The refrigerated goods are cooled by cooling air which is fed in under the grate of the cooler and enters the refrigerated goods evenly distributed through the air passage openings of the grate plates. This cooling air also has the Task to cool the grate plates.

Um einen hohen Wärmerückgewinnungsgrad in der ersten Kühlzone zu erreichen, soll die Kühlluft das Kühlgutbett nicht zu schnell passieren. Eine solche Betriebsweise mit geringer spezifischer Luftbeaufschlagung hat aber den Nachteil, daß die Rostplatten weniger gekühlt werden. Zur Verbesserung der Plattenkühlung ist es bekannt (DE-GM 75 04 290, US-PS 44 60 333,) anstelle von nahezu gleichmäßig über die Platte verteilten Löchern in dem thermisch besonders belasteten vorderen Bereich der Platte eine Vielzahl von Längsrippen mit dazwischen angeordneten Luftdurchtrittsschlitzen vorzusehen. Dadurch verbessert sich zwar die Kühlung der Platte im vor­deren Bereich; gleichzeitig verschlechtert sich damit aber die Luftverteilung unter dem Kühlgut. Außerdem hat die bekannte Platte den Nachteil, daß in Schubrichtung hinter den Luft­durchtrittsschlitzen ein besonders hoher, rillenförmiger Oberflächenverschleiß auftritt. Ferner ist es bekannt, auf der Plattenoberseite Rippen vorzusehen, durch die ein Teil des Kühlguts zur Bildung einer schützenden Schicht festgehalten wird.In order to achieve a high degree of heat recovery in the first cooling zone, the cooling air should not pass the refrigerated goods bed too quickly. Such an operation with low specific air exposure has the disadvantage that the grate plates are cooled less. To improve plate cooling, it is known (DE-GM 75 04 290, US Pat. No. 4,460,333) to provide a plurality of longitudinal ribs with air passage slots arranged in between in the front region of the plate, which is particularly thermally stressed, instead of holes distributed almost uniformly over the plate . This improves the cooling of the plate in the front area; At the same time, however, the air distribution under the refrigerated goods deteriorates. In addition, the known plate has the disadvantage that a particularly high, grooved surface wear occurs in the direction of thrust behind the air passage slots. Furthermore, it is known to provide ribs on the top of the plate, through which part of the refrigerated goods is held to form a protective layer.

Der Erfindung liegt die Aufgabe zugrunde, eine Kühlerrost­platte der eingangs genannten Art zu schaffen, die thermisch und mechanisch höher belastbar ist.The invention has for its object to provide a grille plate of the type mentioned, which is thermally and mechanically stronger.

Die erfindungsgemäße Lösung besteht darin, daß wenigstens eine Mehrzahl von Luftdurchtrittsöffnungen in den Rippen angeordnet ist. Bei diesen Rippen kann es sich um die Verstärkungsrippen handeln. Nach einem weiteren Merkmal der Erfindung können Reihen von in Schubrichtung der Platten hintereinander liegen­den Luftdurchtrittsöffnungen in rippenförmigen Verschleißver­dickungen gelegen sein.The solution according to the invention consists in that at least a plurality of air passage openings are arranged in the ribs. These ribs can be the reinforcing ribs. According to a further feature of the invention, rows of air passage openings lying one behind the other in the thrust direction of the plates can be located in rib-shaped wear thickenings.

Die Erfindung ermöglicht eine etwa gleichmäßige Verteilung der Luftdurchtrittsöffnungen über die gesamte Plattenfläche und dennoch einen intensiven Wärmeaustausch zwischen der Platte und dem Kühlluftstrom. Zwar verliert dabei die bislang für be­sonders wichtig gehaltene, große Rippenaußenfläche an Bedeu­tung für den Wärmeaustausch, weil sie vom Kühlluftstrom nur noch im geringerem Maße berührt wird; da aber die Innenfläche der Luftdurchtrittsöffnungen durch ihre Anordnung in den Rippen vergrößert wird und da ferner infolge der hohen Strö­mungsgeschwindigkeit in den Luftdurchtrittsöffnungen die Wärmeübergangszahl dort wesentlich höher ist als an den Rip­penaußenflächen bei herkömmlicher Ausführung, läßt sich durch die erfindungsgemäße Maßnahme eine insgesamt wesentlich bessere und gleichmäßigere Kühlung der Platte erzielen.The invention enables an approximately uniform distribution of the air passage openings over the entire plate surface and nevertheless an intensive heat exchange between the plate and the cooling air flow. The large outer surface of the fin, which was previously considered particularly important, is losing importance for heat exchange because it is only touched to a lesser extent by the cooling air flow; but since the inner surface of the air passage openings is increased by their arrangement in the ribs and because the high flow velocity in the air passage openings means that the heat transfer coefficient there is significantly higher than on the outer surface of the ribs in a conventional design, the measure according to the invention can be an overall much better and more uniform Achieve cooling of the plate.

Dies ergibt die Möglichkeit, die spezifische Luftmenge pro Platte zu reduzieren und die Verweilzeit der Kühlluft in Kühlgut zu vergrößern. Dies erlaubt einen höheren Wärme­rückgewinn.This makes it possible to reduce the specific air volume per plate and to increase the dwell time of the cooling air in the refrigerated goods. This allows a higher heat recovery.

Vorteile ergeben sich auch bezüglich der Verschleißeigen­schaften der Platte. Zwar ergibt sich auch bei dieser ein erhöhter, rillenförmiger Verschleiß im Bereich der in Schub­richtung verlaufenden Öffnungsreihen; da diese aber im Rippen­bereich, zumindest im Bereich von Verschleißverdickungen, liegen, kann für diesen Verschleiß ein wesentlich größeres Ausmaß zugelassen werden als bei bekannten Rostplatten.There are also advantages with regard to the wear properties of the plate. This also results in increased, grooved wear in the region of the rows of openings running in the direction of thrust; however, since these are in the area of the ribs, at least in the area of wear thickening, a much greater extent can be permitted for this wear than in the case of known grate plates.

Auch werden die Wärmespannungen verringert, weil die ganze Platte gleichmäßiger gekühlt wird. Da die Kühlung der gesamten Platte verbessert wird, ohne daß mechanische Nachteile oder Nachteile in der Kühlluftverteilung entstehen, kann die ther­mische Belastung der Platten gesteigert werden, ohne daß die Plattentemperatur über die zulässigen Werte ansteigt.The thermal stresses are also reduced because the entire plate is cooled more evenly. Since the cooling of the entire plate is improved without mechanical disadvantages or disadvantages in the cooling air distribution, the thermal load on the plates can be increased without the plate temperature rising above the permissible values.

Nach einem weiteren Merkmal der Erfindung kann die Rostplatte seitlich der Befestigungsorgane wenigstens eine bis zur Plattenunterseite durchgehende Längsrippe aufweisen. Zweck­mäßigerweise ist je eine solche Längsrippe nahe den beiden Plattenlängsseiten vorgesehen. Ferner kann nach der Erfindung nahe der hinteren Stirnseite der Platte und nahe den Befesti­gungsorganen eine bis zur Plattenunterseite durchgehenden Querrippe vorgesehen sein. Durch die zusätzlichen Rippen er­hält die Platte eine größere Eigensteifigkeit und eine ver­größerte Oberfläche zur Plattenkühlung, und zwar unabhängig davon, ob diese Rippen mit oder ohne Luftdurchtrittsöffnungen ausgeführt sind. Ferner können Sie zur Spaltabdichtung zwischen dem Rost und darunter angeordneten, stationären Wänden verwendet werden, die zur Abtrennung von gesondert beaufschlagbaren Belüftungskammern dienen.According to a further feature of the invention, the grate plate can have at least one longitudinal rib extending through to the underside of the plate to the side of the fastening members. Such a longitudinal rib is expediently provided near the two longitudinal sides of the plate. Furthermore, according to the invention, a transverse rib extending to the underside of the plate can be provided near the rear end face of the plate and near the fastening members. The additional ribs give the plate greater inherent rigidity and an enlarged surface for cooling the plate, regardless of whether these ribs are designed with or without air passage openings. They can also be used to seal the gap between the grate and the stationary walls underneath it, which are used to separate ventilation chambers that can be acted on separately.

Die Erfindung wird im folgenden näher unter Bezugnahme auf die Zeichnung erläutert. Darin zeigen:

  • Fig. l eine erste und
  • Fig. 2 eine zweite Ausführungsform einer Kühlerrostplatte in perspektivischer Ansicht schräg seitlich von unten.
The invention is explained in more detail below with reference to the drawing. In it show:
  • Fig. L a first and
  • Fig. 2 shows a second embodiment of a grille plate in a perspective view obliquely laterally from below.

Der vordere, freiliegende Abschnitt der Platte l enthält eine Vielzahl von Luftdurchtrittsöffnungen 2, 3 in etwa gleich­mäßiger Verteilung. Der hintere Plattenbereich, der in der Figur links erscheint, enthält keine Luftdurchtrittsöffnungen, weil er von der nächsten Plattenreihe im wesentlichen ab­gedeckt ist.The front, exposed section of the plate 1 contains a plurality of air passage openings 2, 3 in approximately uniform distribution. The rear panel area, which appears on the left in the figure, contains no air passage openings because it is essentially covered by the next row of panels.

Auf der Plattenunterseite findet man im hinteren Bereich die zur Befestigung der Platte an der Rostunterkonstruktion be­stimmten Organe 4. Im vorderen Bereich erkennt man zwei Ver­stärkungsrippen 5, die in Längsrichtung verlaufen und die Luftdurchtrittsöffnungen 3 enthalten. Sie sind, um diese Öffnungen aufnehmen zu können, in deren Bereich verdickt ausgeführt.On the underside of the plate you will find the organs 4 intended for fastening the plate to the grate substructure. In the front area one can see two reinforcing ribs 5 which run in the longitudinal direction and contain the air passage openings 3. In order to be able to accommodate these openings, they are made thickened in their area.

Ferner erkennt man, daß die übrigen Luftdurchtrittsöffnungen in Längsreihen angeordnet sind, die in rippenartigen, in Längsrichtung verlaufenden Verdickungen 6 angeordnet sind, die eine Verschleißreserve für den zu erwartenden rippenförmigen Verschleiß im Bereich der Öffnungsreihen bilden.It can also be seen that the remaining air passage openings are arranged in longitudinal rows, which are arranged in rib-like, longitudinally extending thickenings 6, which form a wear reserve for the expected rib-shaped wear in the region of the opening rows.

Neben den mechanischen Aufgaben der Rippen - nämlich Ver­steifung der Konstruktion bei den Rippen 5 und Verschleiß­reserve bei den Rippen 6 - erfüllen sie die Aufgabe, die Wärmeaustauschfläche im unmittelbaren Bereich der Luftdurch­trittsöffnungen 2, 3 zu vergrößern und den Wärmetransport von der Plattenoberseite zu diesen Wärmeaustauschflächen zu ermöglichen.In addition to the mechanical tasks of the fins - namely stiffening of the construction for the fins 5 and wear reserve for the fins 6 - they fulfill the task of increasing the heat exchange area in the immediate area of the air passage openings 2, 3 and of enabling the heat transfer from the top of the plate to these heat exchange surfaces .

In beiden Plattenausführungen ist an der hinteren Stirnseite nahe den Befestigungsorganen 4 eine Querrippe 7 angeordnet, die sich über die gesamte Plattenbreite erstreckt und deren Begrenzungskante in der die Platte unterseitig begrenzenden Ebene liegt. Desgleichen sind an den Plattenlängsseiten über die gesamte Plattenlänge durchgehende Rippen 8 vorgesehen, deren Unterkanten gleichfalls nahezu in der genannten Ebene liegen. Durch diese zusätzlichen Rippen erhält die Platte eine größere Eigensteifigkeit und eine vergrößerte Oberfläche zur Kühlung. Da diese Platten oftmals in thermisch hoch bean­spruchten Bereichen eines Kühlers, beispielsweise eines Zementklinkerkühlers eingesetzt werden, kann es wünschenswert sein, den Kühlrost dem Bedarf entsprechend bereichsweise mit unterschiedlichen Kühlluftmengen und unterschiedlichen Kühl­luftdruck zu beaufschlagen. Hierzu werden unter dem Rost Kammern angeordnet, die gesondert mit Kühlluft beaufschlagt werden können. Während es bislang schwierig war, den Rost gegenüber den Wänden dieser Kammer in Längs- und Querrichtung abzudichten, da dieser Bereich hohen Temperaturen ausgesetzt und schlecht zugänglich ist, wird durch die zusätzlichen Rippen 7 und 8, die hinreichend tief bis zur Plattenunterseite durchgehen, eine Spaltabdichtung zwischen der jeweiligen Plattenrippe und der Kammerwand mit einfachen Mitteln möglich. Durch die bessere Abdichtung der Kammern zum Rost wird Kühl­luft gespart und ein besserer Kühler- und Rekuperations­wirkungsgrad erreicht.In both plate designs, a transverse rib 7 is arranged on the rear end near the fastening elements 4, which extends over the entire width of the plate and whose boundary edge lies in the plane delimiting the plate on the underside. Likewise, continuous ribs 8 are provided on the long sides of the panel over the entire length of the panel, the lower edges of which likewise lie almost in the plane mentioned. These additional ribs give the panel greater inherent rigidity and an enlarged surface for cooling. Since these plates are often used in thermally highly stressed areas of a cooler, for example a cement clinker cooler, it may be desirable to include the cooling grate in certain areas as required to apply different amounts of cooling air and different cooling air pressure. For this purpose, chambers are arranged under the grate, which can be supplied with cooling air separately. While it has so far been difficult to seal the grate longitudinally and transversely against the walls of this chamber, since this area is exposed to high temperatures and is difficult to access, the additional ribs 7 and 8, which extend sufficiently deep to the underside of the plate, provide a gap seal possible between the respective plate rib and the chamber wall with simple means. The better sealing of the chambers to the grate saves cooling air and achieves better cooling and recuperation efficiency.

Claims (6)

1. Kühlerrostplatte mit Luftdurchtrittsöffnungen und unter­seitigen Rippen, dadurch gekennzeichnet, daß wenigstens eine Mehrzahl von Luftdurchtrittsöffnungen (2, 3) in den Rippen (5, 6) angeordnet ist.1. Radiator grate plate with air passage openings and ribs on the underside, characterized in that at least a plurality of air passage openings (2, 3) is arranged in the ribs (5, 6). 2. Rostplatte nach Anspruch l, dadurch gekennzeichnet, daß die Rippen als Verstärkungsrippen (5) ausgebildet sind.2. Grate plate according to claim l, characterized in that the ribs are designed as reinforcing ribs (5). 3. Rostplatte nach Anspruch l, dadurch gekennzeichnet, daß die Rippen von in Längsrichtung verlaufenden Verschleißver­dickungen (6) gebildet sind.3. Grate plate according to claim l, characterized in that the ribs are formed by longitudinally extending wear thickenings (6). 4. Rostplatte nach einem der Ansprüche l bis 3, dadurch gekennzeichnet, daß sie seitlich der Befestigungsorgane (4) wenigstens eine bis zur Plattenunterseite durchgehende Längsrippe (8) aufweist.4. grate plate according to one of claims l to 3, characterized characterized in that it has at least one longitudinal rib (8) running through to the underside of the plate to the side of the fastening members (4). 5. Rostplatte nach Anspruch 4, dadurch gekennzeichnet, daß je eine Längsrippe (8) nahe den beiden Plattenlängsseiten vor­gesehen ist.5. grate plate according to claim 4, characterized in that a longitudinal rib (8) is provided near the two longitudinal sides of the plate. 6. Rostplatte nach einem der Ansprüche l bis 5, dadurch ge­kennzeichnet, daß sie nahe der hinteren Stirnseite und nahe den Befestigungsorganen (4) eine bis zur Plattenunterseite durchgehende Querrippe (7) aufweist.6. Grate plate according to one of claims l to 5, characterized in that it has a continuous rib (7) up to the underside of the plate near the rear end face and near the fastening members (4).
EP87103073A 1986-03-05 1987-03-04 Cooler grid plate Withdrawn EP0235808A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3607224 1986-03-05
DE19863607224 DE3607224A1 (en) 1986-03-05 1986-03-05 RADIATOR GRID PLATE

Publications (1)

Publication Number Publication Date
EP0235808A1 true EP0235808A1 (en) 1987-09-09

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ID=6295563

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Application Number Title Priority Date Filing Date
EP87103073A Withdrawn EP0235808A1 (en) 1986-03-05 1987-03-04 Cooler grid plate

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DE (1) DE3607224A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110878846A (en) * 2018-09-05 2020-03-13 和正丰科技股份有限公司 Diaphragm valve structure and heat source isolation method thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2084361A5 (en) * 1970-03-11 1971-12-17 Wedag Westfalia Dinnendahl
DE2454202A1 (en) * 1974-11-15 1976-05-26 Kloeckner Humboldt Deutz Ag Cooler grate plate, esp. for cooling cement clinker - made of metal box-frame contg. refractory layer and air holes
FR2527759A1 (en) * 1982-05-26 1983-12-02 Ugine Aciers Grid esp. for cement clinker cooling - has solids flow obstacles to form protective solids layer
US4460333A (en) * 1982-03-05 1984-07-17 Carlo Longaretti Furnace grate

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE138905C (en) *
DE6905565U (en) * 1969-02-13 1969-07-17 Mechanische Weberei G M B H PROJECTION WALL CREATED FROM PROJECTION SURFACES
DE2806974C2 (en) * 1978-02-18 1980-01-31 Josef Martin Feuerungsbau Gmbh, 8000 Muenchen Grate bars for grate coverings, in particular for furnaces
DE8305830U1 (en) * 1982-03-05 1983-09-22 F.G.S. - Fonderie Ghise e Acciai Speciali S.p.A., 24047 Treviglio OVEN GRILLE

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2084361A5 (en) * 1970-03-11 1971-12-17 Wedag Westfalia Dinnendahl
DE2454202A1 (en) * 1974-11-15 1976-05-26 Kloeckner Humboldt Deutz Ag Cooler grate plate, esp. for cooling cement clinker - made of metal box-frame contg. refractory layer and air holes
US4460333A (en) * 1982-03-05 1984-07-17 Carlo Longaretti Furnace grate
FR2527759A1 (en) * 1982-05-26 1983-12-02 Ugine Aciers Grid esp. for cement clinker cooling - has solids flow obstacles to form protective solids layer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110878846A (en) * 2018-09-05 2020-03-13 和正丰科技股份有限公司 Diaphragm valve structure and heat source isolation method thereof
CN110878846B (en) * 2018-09-05 2022-05-24 和正丰科技股份有限公司 Diaphragm valve structure and heat source isolation method thereof

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Publication number Publication date
DE3607224C2 (en) 1992-11-05
DE3607224A1 (en) 1987-09-10

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