EP0879994A2 - Device for removing and cooling bed ashes from fluidized bed combustion apparatus - Google Patents

Device for removing and cooling bed ashes from fluidized bed combustion apparatus Download PDF

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Publication number
EP0879994A2
EP0879994A2 EP98108736A EP98108736A EP0879994A2 EP 0879994 A2 EP0879994 A2 EP 0879994A2 EP 98108736 A EP98108736 A EP 98108736A EP 98108736 A EP98108736 A EP 98108736A EP 0879994 A2 EP0879994 A2 EP 0879994A2
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EP
European Patent Office
Prior art keywords
cooled
housing
over
tables
floors
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
EP98108736A
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German (de)
French (fr)
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EP0879994A3 (en
Inventor
Bernhard Michelbrink
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.)
BBP Energy GmbH
Original Assignee
BBP Energy GmbH
Babcock Kraftwerkstechnik GmbH
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Application filed by BBP Energy GmbH, Babcock Kraftwerkstechnik GmbH filed Critical BBP Energy GmbH
Publication of EP0879994A2 publication Critical patent/EP0879994A2/en
Publication of EP0879994A3 publication Critical patent/EP0879994A3/en
Ceased legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D11/00—Heat-exchange apparatus employing moving conduits
    • F28D11/06—Heat-exchange apparatus employing moving conduits the movement being reciprocating or oscillating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J1/00—Removing ash, clinker, or slag from combustion chambers
    • F23J1/02—Apparatus for removing ash, clinker, or slag from ash-pits, e.g. by employing trucks or conveyors, by employing suction devices

Definitions

  • the invention relates to a device for removal and Cooling bed ash from a fluidized bed furnace with the Features of the preamble of claim 1.
  • Such a device has the task that is 870 ° C. Pull off bed ash from the fluidized bed combustion and dry cool to below 300 ° C.
  • Screw conveyor with a water-cooled, in one Cooled housing arranged conveyor screw known. At Leakage in the cooling system of these screw conveyors can do this Cooling water penetrate into the interior and the bed ash moisten. The moistened ash is on the housing wall and Bake in the screw conveyor so that the conveyor can become blocked and come to a standstill.
  • Fluidized bed boilers known from Rieselkühler Have coils through which cooling water flows.
  • These pipe coils are subject to contact with the bed ash increased wear due to erosion.
  • the invention has for its object a device for dry removal and for cooling bed ash To create fluidized bed furnaces that are simple in construction and is insensitive to wear.
  • the scraper chain conveyor of the device according to the invention is a robust, wear-resistant conveyor, and the cooled floor over which the scraper chain runs is in easy to provide with wear-resistant plates.
  • the arrangement of several chilled floors are within the Housing of the conveyor sufficient heat exchanger surfaces created so that even large amounts of bed ash are sufficient can be cooled. Due to the staggered arrangement of the Tables forming chilled floors remain even at high Throughput the layer height on each table proportionately low, so that good cooling of the bed ash can be achieved is.
  • Vortex combustion chamber 1 shown in the by blowing Combustion and fluidization air from a fluidized bed Fuel and bed ash is maintained. Part of this Bed ash must be removed from the system. To this end is the bottom 2 of the vortex combustion chamber 1 with several Ash extraction pipes 3 provided in a closed housing 4 open into a conveyor for conveying and cooling the circulates dry removed bed ash.
  • the conveyor is designed as a scraper chain conveyor 5.
  • This Scraper chain conveyor 5 contains two chains rotating in parallel 6, which are connected at intervals by scrapers 7 are. 1, 3 and 4, the chains 6 are by a line indicated, the arrows 8 indicate the direction of conveyance.
  • Each Chain 6 is around pulleys 9 and one with a drive provided drive wheel 10 out.
  • the housing 4 is provided with a discharge 11.
  • the chains 6 connected by the scraper 7 Scraper chain conveyor 5 are guided over a floor 12.
  • a floor 12 is provided with a double jacket, which has an inflow 13 and a drain 14 for a coolant, e.g. B. water having.
  • the top plate of the bottom 12 is wear-resistant executed.
  • the floors 12 are in the conveying direction into individual tables 16 divided, which are spaced from each other.
  • a slot 17 is formed in each case between two tables 16. Through this slot 17 falls through the scraper chain conveyor 5 over the table 16 promoted bed ash on a table 16 of the deeper lying cooled floor 12 or on the floor 15 of the Housing 4.
  • the tables 16 of the cooled floors 12 are in the individual Layers offset from each other. This is where in the conveying direction of the rear end of a table 16 and thus also the slot 17 through which the bed ash falls, above the in Direction of conveyance at the front end of the table below 16.
  • the direction of movement that the bed ash during the Funding through the floors 12 through the housing 4 takes, lets follow each other using the vertical arrows 18.
  • FIGS. 3 and 4 show the same division and arrangement of the tables 16 as shown in FIG. 1, only the chain guide is different. So are according to Fig. 3 in a common housing 4 two scraper chain conveyor 5, 5 'each with its own drive. The one Scraper chain conveyor 5 is over two cooled floors 12 and other scraper chain conveyor 5 'is via a cooled floor 12 and the bottom 15 of the housing 4 out. Because the arrangement and the division of the cooled floors 12 into tables 16 is not the direction of movement of the bed ash remains the same same as in Fig. 1.
  • this contains directly under the Vortex combustion chamber 1 arranged housing 4 two cooled floors 12. A scraper chain conveyor 5 is guided over these floors 12. Under this first housing 4 is a further housing 4 ' arranged, in which a scraper chain conveyor 5 'is also guided is. This further housing 4 'has a drop 11 Mistake.
  • the two housings 4, 4 ' are by chutes 19th interconnected, over which the bed pocket from the top Housing 4 gets into the further housing 4. Any of these Chutes 19 connects to a slot 17 between the Tables 16 of the lower cooled floor 12 in the upper housing 4 on.
  • the chutes 19 each open above the front end a table 16 arranged in the upper level in the further housing 4 '.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Gasification And Melting Of Waste (AREA)
  • Pusher Or Impeller Conveyors (AREA)
  • Fluidized-Bed Combustion And Resonant Combustion (AREA)

Abstract

The assembly to remove and cool the bed ash, from a fluidised bed combustion assembly, has a drag chain conveyor (5) within a housing (4) over a cooled base (12). A number of cooled bases (12) are over each other, on a number of planes. The cooled bases (12), in each plane, are divided into a number of tables (16) along the direction of travel, forming lateral slits (17) at intervals. The tables (16) in each plane are offset against each other so that, in the direction of movement, the trailing end of each table (16) is over the leading end of a table (16) at the lower cooled base (12).

Description

Die Erfindung betrifft eine Vorrichtung zur Entnahme und Kühlung von Bettasche aus einer Wirbelschichtfeuerung mit den Merkmalen des Oberbegriffes des Anspruches 1.The invention relates to a device for removal and Cooling bed ash from a fluidized bed furnace with the Features of the preamble of claim 1.

Eine derartige Vorrichtung hat die Aufgabe, die 870 °C heiße Bettasche aus der Wirbelschichtfeuerung trocken abzuziehen und auf unter 300 °C abzukühlen. Zu diesem Zweck sind Schneckenförderer mit einer durch Wasser gekühlten, in einem gekühlten Gehäuse angeordneten Förderschnecke bekannt. Bei einer Leckage des Kühlsystems dieser Scheckenförderer kann das Kühlwasser in den Innenraum eindringen und die Bettasche anfeuchten. Die angefeuchtete Asche wird an der Gehäusewand und in dem Fördergang der Schnecke anbacken, so daß der Förderer sich verstopft und zum Stillstand kommen kann.Such a device has the task that is 870 ° C. Pull off bed ash from the fluidized bed combustion and dry cool to below 300 ° C. For this purpose Screw conveyor with a water-cooled, in one Cooled housing arranged conveyor screw known. At Leakage in the cooling system of these screw conveyors can do this Cooling water penetrate into the interior and the bed ash moisten. The moistened ash is on the housing wall and Bake in the screw conveyor so that the conveyor can become blocked and come to a standstill.

Weiterhin sind für die Entnahme und Kühlung von Bettasche aus Wirbelschichtfeuerungen Rieselkühler bekannt, die von Kühlwasser durchflossene Rohrschlangen aufweisen. Durch den Kontakt mit der Bettasche unterliegen diese Rohrschlangen einem erhöhten Verschleiß durch Erosion.Furthermore, for the removal and cooling of bed ash Fluidized bed boilers known from Rieselkühler Have coils through which cooling water flows. By the These pipe coils are subject to contact with the bed ash increased wear due to erosion.

Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung zur trockenen Entnahme und zur Kühlung von Bettasche aus Wirbelschichtfeuerungen zu schaffen, die einfach im Aufbau und unempfindlich gegen Verschleiß ist.The invention has for its object a device for dry removal and for cooling bed ash To create fluidized bed furnaces that are simple in construction and is insensitive to wear.

Diese Aufgabe wird bei einer gattungsgemäßen Vorrichtung erfindungsgemäß durch die kennzeichnenden Merkmale des Anspruches 1 gelöst. Vorteilhafte Ausgestaltungen der Erfindung sind Gegenstand der Unteransprüche. This object is achieved in a generic device according to the invention by the characterizing features of Claim 1 solved. Advantageous embodiments of the invention are the subject of the subclaims.

Der Kratzkettenförderer der erfindungsgemäßen Vorrichtung ist ein robuster, gegen Verschleiß unempfindlicher Förderer, und der gekühlte Boden, über den die Kratzkette läuft, ist in einfacher Weise mit verschleißfesten Platten zu versehen. Durch die Anordnung mehrerer gekühlter Böden werden innerhalb des Gehäuses des Förderers genügend Wärmetauscherflächen geschaffen, so daß auch große Mengen an Bettasche ausreichend gekühlt werden können. Durch die versetzte Anordnung der die gekühlten Böden bildenden Tische bleibt auch bei hohen Durchsätzen die Schichthöhe auf jedem Tisch verhältnismäßig niedrig, so daß eine gute Kühlung der Bettasche zu erzielen ist.The scraper chain conveyor of the device according to the invention is a robust, wear-resistant conveyor, and the cooled floor over which the scraper chain runs is in easy to provide with wear-resistant plates. By the arrangement of several chilled floors are within the Housing of the conveyor sufficient heat exchanger surfaces created so that even large amounts of bed ash are sufficient can be cooled. Due to the staggered arrangement of the Tables forming chilled floors remain even at high Throughput the layer height on each table proportionately low, so that good cooling of the bed ash can be achieved is.

Mehrere Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt und werden im folgenden näher erläutert.
Es zeigen:

Fig. 1
schematisch den Längsschnitt durch einen Förderer
Fig. 2
den Schnitt II - II nach Fig. 1 und
Fig. 3 und 4
jeweils einen Längsschnitt durch einen Förderer gemäß einer anderen Ausführungsform.
Several embodiments of the invention are shown in the drawing and are explained in more detail below.
Show it:
Fig. 1
schematically the longitudinal section through a conveyor
Fig. 2
the section II - II of Fig. 1 and
3 and 4
each a longitudinal section through a conveyor according to another embodiment.

Von einer Wirbelschichtfeuerung ist der untere Teil einer Wirbelbrennkammer 1 gezeigt, in der durch Einblasen von Verbrennungs- und Fluidisationsluft eine Wirbelschicht aus Brennstoff und Bettasche aufrechterhalten wird. Ein Teil dieser Bettasche muß aus dem System abgezogen werden. Zu diesem Zweck ist der Boden 2 der Wirbelbrennkammer 1 mit mehreren Ascheabzugsrohren 3 versehen, die in ein geschlossenes Gehäuse 4 einmünden, in dem ein Förderers zum Fördern und Kühlen der trocken entnommenen Bettasche umläuft.The lower part of a fluidized bed combustion is one Vortex combustion chamber 1 shown in the by blowing Combustion and fluidization air from a fluidized bed Fuel and bed ash is maintained. Part of this Bed ash must be removed from the system. To this end is the bottom 2 of the vortex combustion chamber 1 with several Ash extraction pipes 3 provided in a closed housing 4 open into a conveyor for conveying and cooling the circulates dry removed bed ash.

Der Förderer ist als Kratzkettenförderer 5 ausgebildet. Dieser Kratzkettenförderer 5 enthält zwei parallel umlaufenden Ketten 6, die in Abständen durch Kratzeisen 7 miteinander verbunden sind. In den Fig. 1, 3 und 4 sind die Ketten 6 durch eine Linie angedeutet, wobei die Pfeile 8 die Förderrichtung angeben. Jede Kette 6 ist um Umlenkrollen 9 und um ein mit einem Antrieb versehenes Antriebsrad 10 geführt. Zum Austragen der Bettasche ist das Gehäuse 4 mit einem Abwurf 11 versehen.The conveyor is designed as a scraper chain conveyor 5. This Scraper chain conveyor 5 contains two chains rotating in parallel 6, which are connected at intervals by scrapers 7 are. 1, 3 and 4, the chains 6 are by a line indicated, the arrows 8 indicate the direction of conveyance. Each Chain 6 is around pulleys 9 and one with a drive provided drive wheel 10 out. For removing the bed ash the housing 4 is provided with a discharge 11.

Die durch die Kratzeisen 7 verbundenen Ketten 6 des Kratzkettenförderers 5 werden über einen Boden 12 geführt. Der Boden 12 ist mit einem Doppelmantel versehen, der einen Zufluß 13 und einen Abfluß 14 für ein Kühlmittel, z. B. Wasser aufweist. Die obere Platte des Bodens 12 ist verschleißfest ausgeführt.The chains 6 connected by the scraper 7 Scraper chain conveyor 5 are guided over a floor 12. Of the Bottom 12 is provided with a double jacket, which has an inflow 13 and a drain 14 for a coolant, e.g. B. water having. The top plate of the bottom 12 is wear-resistant executed.

Innerhalb des Gehäuses 4 sind mehrere gekühlte Böden 12 in mehreren Ebenen übereinander angeordnet. Diese Böden 12 werden, beginnend mit dem untersten Boden 12, nacheinander von dem Kühlmittel durchflossen. Nach Fig. 1 ist ein einziger Kratzkettenförderer 5 vorgesehen, dessen Ketten 6 nacheinander über diese Böden 12 und zuletzt über den Boden 15 des Gehäuses 4 gezogen werden. Dabei werden die Ketten 6 mehrfach umgelenkt. Dadurch ist die Förderrichtung in den einzelnen Ebenen einander entgegengesetzt.Within the housing 4 are several cooled floors 12 in several levels arranged one above the other. These floors 12 will starting with the bottom floor 12, one after the other Coolant flows through. 1 is a single Scraper chain conveyor 5 provided, the chains 6 one after the other over these floors 12 and finally over the floor 15 of the housing 4 are drawn. The chains 6 are deflected several times. As a result, the direction of conveyance is different in the individual levels opposite.

Die Böden 12 sind in Förderrichtung in einzelne Tische 16 aufgeteilt, die mit Abstand voneinander angeordnet sind. Dabei wird jeweils zwischen zwei Tischen 16 ein Schlitz 17 gebildet. Durch diesen Schlitz 17 fällt die durch den Kratzkettenförderer 5 über den Tisch 16 geförderte Bettasche auf einen Tisch 16 des tiefer liegenden gekühlten Bodens 12 oder auf den Boden 15 des Gehäuses 4.The floors 12 are in the conveying direction into individual tables 16 divided, which are spaced from each other. Here a slot 17 is formed in each case between two tables 16. Through this slot 17 falls through the scraper chain conveyor 5 over the table 16 promoted bed ash on a table 16 of the deeper lying cooled floor 12 or on the floor 15 of the Housing 4.

Die Tische 16 der gekühlten Böden 12 sind in den einzelnen Ebenen versetzt zueinander angeordnet. Dabei befindet sich das in Förderrichtung hintere Ende eines Tisches 16 und damit auch der Schlitz 17, durch den die Bettasche fällt, oberhalb des in Förderrichtung vorderen Endes des darunter angeordneten Tisches 16. Die Bewegungsrichtung, die die Bettasche während der Förderung über die Böden 12 durch das Gehäuse 4 nimmt, läßt sich an Hand der vertikalen Pfeile 18 verfolgen.The tables 16 of the cooled floors 12 are in the individual Layers offset from each other. This is where in the conveying direction of the rear end of a table 16 and thus also the slot 17 through which the bed ash falls, above the in Direction of conveyance at the front end of the table below 16. The direction of movement that the bed ash during the Funding through the floors 12 through the housing 4 takes, lets follow each other using the vertical arrows 18.

Durch die versetzte Anordnung der Tische 16 der gekühlten Böden 12 wird über jeden Tisch 16 eine gleichbleibende Menge an Bettasche gefördert. Lediglich der Boden 15 des Gehäuses 4 nimmt nacheinander die Bettasche auf, die über alle Tische 16 einer Ebene gefördert wird. Die Schichthöhe auf den Tischen ist damit trotz der großen insgesamt durchgesetzten Menge an Bettasche verhältnismäßig gering. Durch den Kontakt mit der gekühlten Oberfläche der Tische 16 wird der Bettasche während der Bewegung über die Tische 16 Wärme entzogen. Dabei ermöglicht die verhältnismäßig geringe Schichthöhe eine günstige Abführung der Wärme aus der Bettasche in das durch die gekühlten Böden 12 strömende Kühlmittel. Bei dem Abwurf von einem Tisch 16 auf den darunter liegenden Tisch 16 wird die Bettasche umgewälzt, so daß andere Ascheteile mit der gekühlten Oberfläche in Berührung kommen und intensiver gekühlt werden.Due to the staggered arrangement of the tables 16 of the cooled floors 12 will have a constant amount on each table 16 Encouraged bed ash. Only the bottom 15 of the housing 4 one after the other picks up the bed pocket, which over all tables 16 one level is promoted. The layer height on the tables is thus in spite of the large total amount implemented Bed ash relatively low. Through contact with the cooled surface of the tables 16 is the bed ash during 16 heat removed from the movement over the tables. Here allows the relatively low layer height Favorable heat dissipation from the bed ash into the through the cooled floors 12 flowing coolant. When dropping a table 16 on the underlying table 16 is the Bed ash circulated so that other ash parts with the cooled Come into contact with the surface and be cooled more intensively.

Die in den Fig. 3 und 4 dargestellten Ausführungen zeigen dieselbe Aufteilung und Anordnung der Tische 16 wie gemäß Fig. 1, lediglich die Kettenführung ist eine andere. So sind gemäß Fig. 3 in einem gemeinsamen Gehäuse 4 zwei Kratzkettenförderer 5, 5' mit jeweils einem eigenen Antrieb untergebracht. Der eine Kratzkettenförderer 5 ist über zwei gekühlte Böden 12 und der andere Kratzkettenförderer 5' ist über einen gekühlten Boden 12 und den Boden 15 des Gehäuses 4 geführt. Da die Anordnung und die Aufteilung der gekühlten Böden 12 in Tische 16 nicht geändert wurde, bleibt die Bewegungsrichtung der Bettasche die gleiche wie in Fig. 1.The designs shown in FIGS. 3 and 4 show the same division and arrangement of the tables 16 as shown in FIG. 1, only the chain guide is different. So are according to Fig. 3 in a common housing 4 two scraper chain conveyor 5, 5 'each with its own drive. The one Scraper chain conveyor 5 is over two cooled floors 12 and other scraper chain conveyor 5 'is via a cooled floor 12 and the bottom 15 of the housing 4 out. Because the arrangement and the division of the cooled floors 12 into tables 16 is not the direction of movement of the bed ash remains the same same as in Fig. 1.

Bei der Ausführung in Fig. 4 enthält das direkt unter der Wirbelbrennkammer 1 angeordnete Gehäuse 4 zwei gekühlte Böden 12. Über diese Böden 12 ist ein Kratzkettenförderer 5 geführt. Unter diesem ersten Gehäuse 4 ist ein weiteres Gehäuse 4' angeordnet, in der ebenfalls ein Kratzkettenförderer 5' geführt ist. Dieses weitere Gehäuse 4' ist mit einem Abwurf 11 versehen. Die beiden Gehäuse 4, 4' sind durch Schurren 19 miteinander verbunden, über die die Bettasche von dem oberen Gehäuse 4 in das weitere Gehäuse 4 gelangt. Jede dieser Schurren 19 schließt sich an einen Schlitz 17 zwischen den Tischen 16 des unteren gekühlten Bodens 12 im oberen Gehäuse 4 an. Die Schurren 19 münden jeweils oberhalb des vorderen Endes eines in der oberen Ebene angeordneten Tisches 16 in das weitere Gehäuse 4' ein.In the embodiment in Fig. 4, this contains directly under the Vortex combustion chamber 1 arranged housing 4 two cooled floors 12. A scraper chain conveyor 5 is guided over these floors 12. Under this first housing 4 is a further housing 4 ' arranged, in which a scraper chain conveyor 5 'is also guided is. This further housing 4 'has a drop 11 Mistake. The two housings 4, 4 'are by chutes 19th interconnected, over which the bed pocket from the top Housing 4 gets into the further housing 4. Any of these Chutes 19 connects to a slot 17 between the Tables 16 of the lower cooled floor 12 in the upper housing 4 on. The chutes 19 each open above the front end a table 16 arranged in the upper level in the further housing 4 '.

Claims (6)

Vorrichtung zur Entnahme und Kühlung von Bettasche aus einer Wirbelschichtfeuerung, an deren Boden (2) ein oder mehrere Ascheabzugsrohre (3) angeschlossen sind, die mit einer gekühlten Fördereinrichtung verbunden sind, dadurch gekennzeichnet, daß die Fördereinrichtung aus einem Kratzkettenförderer (5) besteht, der innerhalb eines Gehäuses (4) über einen gekühlten Boden (12) geführt ist, daß mehrere solcher gekühlter Böden (12) in mehreren Ebenen übereinander angeordnet sind, daß die gekühlten Böden (12) in jeder Ebene in Förderrichtung in mehrere Tische (16) aufgeteilt sind, die jeweils unter Bildung eines quer zur Förderrichtung verlaufenden Schlitzes (17) mit Abstand voneinander angeordnet sind und daß die Tische (16) in den einzelnen Ebenen derart versetzt zueinander angeordnet sind, daß das in Förderrichtung hintere Ende eines Tisches (16) sich über dem in Förderrichtung vorderen Ende eines Tisches (16) des darunter angeordneten gekühlten Bodens (12) befindet.Device for removing and cooling bed ash from a Fluidized bed firing, at the bottom (2) one or more Ash extraction pipes (3) are connected with a cooled conveyor are connected, thereby characterized in that the conveyor from a Scraper chain conveyor (5), which is within a Housing (4) is guided over a cooled base (12), that several such cooled floors (12) in several levels are arranged one above the other that the cooled floors (12) in each level in the conveying direction in several tables (16) are divided, each forming a cross to Direction of conveying slot (17) at a distance are arranged from each other and that the tables (16) in the individual levels are arranged so offset from each other, that the rear end in the conveying direction of a table (16) itself over the front end of a table in the conveying direction (16) of the cooled base (12) arranged underneath located. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß über die Tische (16) der gekühlten Böden (12) aller Ebenen und über den Gehäuseboden (15) ein einziger Kratzkettenförderer (5) unter mehrfacher Umlenkung der Kratzkette (6) geführt ist.Device according to claim 1, characterized in that over the tables (16) of the cooled floors (12) of all levels and a single one over the housing base (15) Scraper chain conveyor (5) with multiple deflection of the Scraper chain (6) is guided. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß in dem Gehäuse (4) mehrere separate Kratzkettenförderer (5, 5') angeordnet sind, von denen jeweils einer über mehrere gekühlte Böden (12) oder über einen oder mehrere gekühlte Böden (12) und den Gehäuseboden (15) geführt ist.Device according to claim 1, characterized in that in the housing (4) has several separate scraper chain conveyors (5, 5 ') are arranged, each of which over several cooled floors (12) or one or more cooled floors Bottoms (12) and the housing base (15) is guided. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß unterhalb des Gehäuses (4) mindestens ein weiteres mit mindestens einem gekühlten Boden (12) versehenes Gehäuse (4') angeordnet ist, daß die untereinander angeordneten Gehäuse (4, 4') über eine oder mehrere Schurren (19) miteinander verbunden sind und daß in jedem Gehäuse (4, 4') ein eigener Kratzkettenförderer (5, 5') angeordnet ist.Device according to claim 1, characterized in that below the housing (4) with at least one other housing provided with at least one cooled bottom (12) (4 ') is arranged that the one below the other Housing (4, 4 ') over one or more chutes (19) are interconnected and that in each housing (4, 4 ') a separate scraper chain conveyor (5, 5 ') is arranged. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß die Schurren (19) sich jeweils an einen Schlitz (17) zwischen den Tischen (16) des unteren gekühlten Bodens (12) des Gehäuses (4) anschließen und in das weitere Gehäuse (4') oberhalb des in Förderrichtung vorderen Ende eines Tisches (16) des oberen gekühlten Bodens (12) einmünden.Apparatus according to claim 4, characterized in that the Chutes (19) each have a slot (17) between the tables (16) of the lower cooled floor (12) of the Connect the housing (4) and into the further housing (4 ') above the front end of a table in the conveying direction (16) of the upper cooled floor (12) open. Vorrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß jedes Ascheabzugsrohr (3) über dem in Förderrichtung vorderen Ende eines in der oberen Ebene angeordneten Tisches (16) in das Gehäuse (4) einmündet.Device according to one of claims 1 to 5, characterized characterized in that each ash extraction pipe (3) over the in Direction of conveyance front end in the upper level arranged table (16) opens into the housing (4).
EP98108736A 1997-05-21 1998-05-14 Device for removing and cooling bed ashes from fluidized bed combustion apparatus Ceased EP0879994A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19721206A DE19721206A1 (en) 1997-05-21 1997-05-21 Device for removing and cooling bed ash from a fluidized bed furnace
DE19721206 1997-05-21

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EP0879994A2 true EP0879994A2 (en) 1998-11-25
EP0879994A3 EP0879994A3 (en) 1999-10-06

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US (1) US6082442A (en)
EP (1) EP0879994A3 (en)
JP (1) JPH11101428A (en)
CN (1) CN1201880A (en)
DE (1) DE19721206A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0952397A1 (en) * 1998-04-22 1999-10-27 Karl Becker Conveyor for removing bulk material from a boiler
WO2010049367A3 (en) * 2008-10-31 2011-06-16 Clyde Bergemann Drycon Gmbh Method and device for feeding material from a combustion boiler
DE102009060305A1 (en) 2009-12-23 2011-06-30 Clyde Bergemann DRYCON GmbH, 46485 Method for cooling conveyor for conveying hot material from incineration tank in e.g. system for combustion of fossil fuel, involves carrying out partial spraying of lower side of upper drum of conveyor with cooling medium
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CN104419471A (en) * 2013-08-27 2015-03-18 山西省霍州市化学工业有限责任公司 Anti-outflow device of coal gasifier

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CN1201880A (en) 1998-12-16
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US6082442A (en) 2000-07-04
EP0879994A3 (en) 1999-10-06

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