EP0721491B1 - Device for conveying refuse into a pyrolysis reactor - Google Patents

Device for conveying refuse into a pyrolysis reactor Download PDF

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Publication number
EP0721491B1
EP0721491B1 EP94926780A EP94926780A EP0721491B1 EP 0721491 B1 EP0721491 B1 EP 0721491B1 EP 94926780 A EP94926780 A EP 94926780A EP 94926780 A EP94926780 A EP 94926780A EP 0721491 B1 EP0721491 B1 EP 0721491B1
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EP
European Patent Office
Prior art keywords
pyrolysis reactor
waste
transport channel
inlet tube
transport device
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.)
Expired - Lifetime
Application number
EP94926780A
Other languages
German (de)
French (fr)
Other versions
EP0721491A1 (en
Inventor
Karl May
Hartmut Herm
Karlheinz Unverzagt
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.)
Takuma Co Ltd
Mitsui Engineering and Shipbuilding Co Ltd
Original Assignee
Siemens AG
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Filing date
Publication date
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Publication of EP0721491A1 publication Critical patent/EP0721491A1/en
Application granted granted Critical
Publication of EP0721491B1 publication Critical patent/EP0721491B1/en
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B51/00—Destructive distillation of solid carbonaceous materials by combined direct and indirect heating
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B1/00—Retorts
    • C10B1/10—Rotary retorts
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2203/00—Furnace arrangements
    • F23G2203/20—Rotary drum furnace
    • F23G2203/212—Sealing arrangements between rotary and stationary parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2205/00—Waste feed arrangements
    • F23G2205/12—Waste feed arrangements using conveyors
    • F23G2205/121—Screw conveyor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2205/00—Waste feed arrangements
    • F23G2205/14—Waste feed arrangements using hopper or bin
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2900/00—Special features of, or arrangements for incinerators
    • F23G2900/52001—Rotary drums with co-current flows of waste and gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERALĀ ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L2900/00—Special arrangements for supplying or treating air or oxidant for combustion; Injecting inert gas, water or steam into the combustion chamber
    • F23L2900/07002—Injecting inert gas, other than steam or evaporated water, into the combustion chambers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERALĀ ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L2900/00—Special arrangements for supplying or treating air or oxidant for combustion; Injecting inert gas, water or steam into the combustion chamber
    • F23L2900/07008—Injection of water into the combustion chamber

Definitions

  • the invention relates to a transport device for Waste, in which a waste feed shaft is connected to a transport channel is connected, in the longitudinal direction one of one Motor drivable stuffing screw is arranged, and at the the transport channel into a pyrolysis reactor, in particular in a smoldering drum rotatable about its longitudinal axis.
  • the transport device becomes thermal waste disposal used, especially after the smoldering-burning process.
  • the procedure and a plant for thermal waste disposal operating afterwards are for example in EP-A-0 302 310 and in DE-A-38 30 153 and also described in EP-A-0 360 052.
  • the plant for thermal waste disposal after the smoldering process contains as essential components a pyrolysis reactor and a high-temperature combustion chamber.
  • the pyrolysis reactor puts the over a waste transport device of the type mentioned discarded waste in a substoichiometric process Smoldering process in carbonization gas and pyrolysis residues.
  • the Smoldering gas and the pyrolysis residue are then made more suitable Refurbishing the burner of the high temperature combustion chamber fed.
  • Flue gas line fed to a chimney as an outlet.
  • Flue gas pipes are in particular a heat recovery steam generator as a cooling device, a dust filter system and a flue gas cleaning system built-in.
  • a gas compressor which is located directly at the exit of the Flue gas cleaning system arranged and as a suction fan can be trained.
  • the built-in gas compressor is used for Maintenance of a vacuum, even if only slight in the pyrolysis drum. Because of this negative pressure prevents carbonization gas through the ring seals of the pyrolysis drum leaks out into the environment.
  • the transport device makes waste different kind, for example shredded household waste, more like household waste Industrial waste and crushed bulky waste, but also dewatered Mud fed to the smoldering drum.
  • Waste transport equipment blocked or disrupted may be too large waste particles from the waste feed chute fall into the helix of the transport or stuffing screw. Avoiding a blockage of the stuffing screw is for continuous operation is required, as it is usually continuous new garbage or waste delivered. For one smooth transportation of waste it is also necessary that it does not adhere to the screw conveyor and engages with the helix turns. To achieve that, it is at Transport screws usual that strips in the housing on the wall are arranged in the space between the screw conveyor and protrude housing. If the screw conveyor rotates, the goods to be transported are passed through the bars of the screw conveyor prevented from turning. However, such strips are subject to high wear.
  • DE-A-38 30 151, DE-A-38 30 152 and the DE-A-38 30 153 are pyrolysis reactors with a heating device for Known waste where supply lines for direct End heating of the waste in the smoldering drum Air outlet nozzles are provided. These supply lines are by a heating gas housing on the smoldering drum guided.
  • the known constructions require special and therefore complex sealing measures.
  • the object of the invention is to provide a transport device for Form waste of the type mentioned in such a way that at least a supply line leading from the outside into the pyrolysis reactor should lead, with comparatively little effort can be relocated.
  • the object is achieved by the technical features of claim 1.
  • In particular is in the room between the housing of the transport channel and the pyrolysis reactor at least one leading from the outside into the pyrolysis reactor Supply line arranged.
  • Blockage of the stuffing screw should be avoided if possible become.
  • the housing has a circular cross section, for example.
  • the housing has a polygonal shape Cross-section.
  • This polygonal cross section can be a trough-shaped cross section with a lower polygonal Part and an upper rectangular part. He can also be a polygon with sides of equal length.
  • the supply line or lines can be all possible Serve purposes, for example the air supply in the Pyrolysis reactor.
  • FIG. 1 is a transport device 2 for waste A. provided at a drop chute or waste feed chute 4 via releasable fastening means 6 to a fixed one Transport channel 8 is connected.
  • the transport channel 8 is here designed as a stuffing screw trough.
  • Has housing 8a a preferably polygonal cross-section, as can be seen from Figure 2.
  • the longitudinal axis of the housing 8a is designated by 9.
  • the transport channel 8 opens into a pyrolysis reactor 10, in in the present case in a rotating around its longitudinal axis 11 Smoldering drum with a larger number of heating pipes 12 is equipped parallel to the longitudinal axis 11.
  • the heating pipes 12, of which only two in FIG. 1 and forty-eight in FIG are shown, are charged with heating gas h to Example with hot air. You are in a 12s front ring moored, to which an input pipe 13 connects concentrically.
  • the end of the transport channel 8 is concentric in this input tube 13. As will be explained below, a good seal is
  • the Longitudinal axis 15 extends in the longitudinal direction.
  • the Shaft 16 of the plug screw 14 is via a gear 18 from driven by a motor 20.
  • the waste feed chute 4 is laterally from or vertically above the transport channel 8 on the latter Arranged at the end.
  • the filling opening for the waste is included 22 and the discharge opening designated 24.
  • the transported Waste A closes the housing 8a there gas-tight. It can then neither air from the fill opening 22 to the discharge opening 24, still flow carbonization gas in the reverse direction.
  • the screw conveyor 14 In Direction of transport behind the compression zone, which is in the Area of the section 14a of the screw conveyor 14, the screw conveyor 14 has a larger slope again. Which over the entire cross section of the transport channel 8 itself this extends the package of waste A again.
  • a mechanical seal 40 is arranged at the end of the inlet pipe 13 .
  • she consists of a rotating sliding ring 42 and a stationary Counter ring 44, both of which can be made of steel. Of the Counter ring 44 is fixed on a ring 46, which with the help a weld seam 48 is welded to the housing 8a.
  • the Transport device 2 are operated fully filled.
  • the screw conveyor 14 can not block, can within the housing 8a different due to the geometric shape located and configured alternative spaces 34 for such relative large parts can be provided.
  • the Transport channel 8 can not only the polygonal shown Cross section, but also have other cross sections.
  • the relatively large, parts to be transported are pressed into this alternative space 34 and with the longitudinally moving waste A in the Evacuation spaces 34 transported, so that they are the screw conveyor 14 can not block.
  • the escape rooms 34 are located usually above or to the side of the screw conveyor 14.
  • the waste A in the rotating smoldering drum 10 by means of the heating pipes 12 indirectly from the heating gas h heated.
  • This heating gas h is via a stationary heating gas inlet housing (not shown) passed into the smoldering drum 10.
  • a stationary heating gas inlet housing (not shown) passed into the smoldering drum 10.
  • Heating tubes 12 attached with one end.
  • the other end is in the tube sheet wall 12s moored that part of the wall a "cold" heating gas outlet housing 50 forms.
  • This Housing 50 passes the heating gas h into an outlet.
  • ring seals 52 or 54 are provided for sealing of the hot gas outlet housing 50 against the rotating Tube 10 and the input tube 13 ring seals 52 or 54 provided. Accordingly, to seal the Heating gas inlet housing (not shown) ring seals intended.
  • the latter can be done according to the smoldering-burning method by means of a suitable device (not shown) in different combustible and inert fractions divided and sorted out be before the combustible portion of a combustion in a high temperature combustion chamber (not shown) becomes.
  • At least one supply line 32 in the space 30 between the housing 8a of the transport channel 8 and the pyrolysis reactor 10 (or its inlet tube 13) also one Disposal line can be arranged.
  • This disposal line can be used, for example, as a suction pipe for discharge of water vapor from the interior of the pyrolysis reactor 10 serve.
  • the arrangement of a supply and / or disposal line 32 instead of at the entrance can also be provided at the outlet of the pyrolysis reactor 10, using an output pipe that joins the input pipe 13 corresponds.

Abstract

A device for conveying waste includes a waste feed chute. A stationary conveyor pipe is connected to the waste feed chute and has a sealed-off end and a housing with a nonround cross section defining a longitudinal direction. A screw conveyor is disposed in the longitudinal direction of the conveyor pipe. A motor drives the screw conveyor. A pyrolysis reactor into which the conveyor pipe discharges, defines a first space between the housing of the conveyor pipe and the pyrolysis reactor. The pyrolysis reactor has an inlet end and a longitudinal axis about which the pyrolysis reactor is rotatable. An inlet tube in which the sealed-off end of the conveyor pipe is disposed, defines a second space between the inlet tube and the conveyor pipe. The inlet tube communicates with the inlet end of the pyrolysis reactor and has a smaller cross section than the pyrolysis reactor. At least one supply line leads from outside into the pyrolysis reactor. The at least one supply line is disposed in the first space and is extended through the second space.

Description

Die Erfindung bezieht sich auf eine Transporteinrichtung fĆ¼r Abfall, bei der ein Abfall-ZufĆ¼hrschacht an einen Transportkanal angeschlossen ist, in dessen LƤngsrichtung eine von einem Motor antreibbare Stopfschnecke angeordnet ist, und bei der der Transportkanal in einen Pyrolysereaktor, insbesondere in eine um ihre LƤngsachse drehbare Schweltrommel, mĆ¼ndet. Die Transporteinrichtung wird zur thermischen Abfallentsorgung eingesetzt, insbesondere nach dem Schwel-Brenn-Verfahren.The invention relates to a transport device for Waste, in which a waste feed shaft is connected to a transport channel is connected, in the longitudinal direction one of one Motor drivable stuffing screw is arranged, and at the the transport channel into a pyrolysis reactor, in particular in a smoldering drum rotatable about its longitudinal axis. The transport device becomes thermal waste disposal used, especially after the smoldering-burning process.

Auf dem Gebiet der Abfallbeseitigung ist das sogenannte Schwel-Brenn-Verfahren bekannt geworden. Das Verfahren und eine danach arbeitende Anlage zur thermischen Abfallentsorgung sind beispielsweise in der EP-A-0 302 310 sowie in der DE-A-38 30 153 und auch in der EP-A-0 360 052 beschrieben. Die Anlage zur thermischen Abfallentsorgung nach dem Schwel-Brenn-Verfahren enthƤlt als wesentliche Komponenten einen Pyrolysereaktor und eine Hochtemperatur-Brennkammer. Der Pyrolysereaktor setzt den Ć¼ber eine Abfall-Transporteinrichtung der eingangs genannten Art aufgegebenen Abfall in einem unterstƶchiometrisch ablaufenden Schwelvorgang in Schwelgas und Pyrolysereststoff um. Das Schwelgas und der Pyrolysereststoff werden sodann nach geeigneter Aufarbeitung dem Brenner der Hochtemperatur-Brennkammer zugefĆ¼hrt. Hier entsteht schmelzflĆ¼ssige Schlacke, die Ć¼ber einen Abzug entnehmbar ist und die nach AbkĆ¼hlung in verglaster Form vorliegt. Das entstehende Rauchgas wird Ć¼ber eine Rauchgasleitung einem Kamin als AuslaƟ zugefĆ¼hrt. In diese Rauchgasleitung sind insbesondere ein Abhitzedampferzeuger als KĆ¼hleinrichtung, eine Staubfilteranlage und eine Rauchgasreinigungsanlage eingebaut. Weiterhin befindet sich in der Rauchgasleitung ein Gasverdichter, der direkt am Ausgang der Rauchgasreinigungsanlage angeordnet und als SaugzuggeblƤse ausgebildet sein kann. Der eingebaute Gasverdichter dient zur Aufrechterhaltung eines - wenn auch nur geringen - Unterdrucks in der Pyrolysetrommel. Durch diesen Unterdruck wird verhindert, daƟ Schwelgas durch die Ringdichtungen der Pyrolysetrommel nach auƟen in die Umgebung austritt.In the field of waste disposal is the so-called Smoldering process became known. The procedure and a plant for thermal waste disposal operating afterwards are for example in EP-A-0 302 310 and in DE-A-38 30 153 and also described in EP-A-0 360 052. The plant for thermal waste disposal after the smoldering process contains as essential components a pyrolysis reactor and a high-temperature combustion chamber. The pyrolysis reactor puts the over a waste transport device of the type mentioned discarded waste in a substoichiometric process Smoldering process in carbonization gas and pyrolysis residues. The Smoldering gas and the pyrolysis residue are then made more suitable Refurbishing the burner of the high temperature combustion chamber fed. This creates molten slag that over a deduction is removable and the glazed after cooling Form is present. The resulting flue gas is fed through a Flue gas line fed to a chimney as an outlet. In these Flue gas pipes are in particular a heat recovery steam generator as a cooling device, a dust filter system and a flue gas cleaning system built-in. Furthermore is in the Flue gas pipe a gas compressor, which is located directly at the exit of the Flue gas cleaning system arranged and as a suction fan can be trained. The built-in gas compressor is used for Maintenance of a vacuum, even if only slight in the pyrolysis drum. Because of this negative pressure prevents carbonization gas through the ring seals of the pyrolysis drum leaks out into the environment.

Durch die Transporteinrichtung wird Abfall unterschiedlicher Art, zum Beispiel zerkleinerter HausmĆ¼ll, hausmĆ¼llƤhnlicher Industrieabfall und zerkleinerter SperrmĆ¼ll, aber auch entwƤsserter Schlamm, der Schweltrommel zugeleitet.The transport device makes waste different Kind, for example shredded household waste, more like household waste Industrial waste and crushed bulky waste, but also dewatered Mud fed to the smoldering drum.

Es hat sich gezeigt, daƟ bei einer Schwel-Brenn-Anlage die Transporteinrichtung fĆ¼r Abfall blockiert oder gestƶrt werden kann, wenn vom Abfall-ZufĆ¼hrschacht zu groƟe Abfallpartikel in die Wendel der Transport- oder Stopfschnecke hineinfallen. Die Vermeidung einer Blockade der Stopfschnecke ist aber fĆ¼r einen Dauerbetrieb erforderlich, wird doch in der Regel kontinuierlich neuer MĆ¼ll oder Abfall angeliefert. FĆ¼r einen reibungslosen Transport des Abfalls ist es auch erforderlich, daƟ dieser nicht an der Transportschnecke haftet und sich mit der Schneckenwendel mitdreht. Um das zu erreichen, ist es bei Transportschnecken Ć¼blich, daƟ im GehƤuse an dessen Wand Leisten angeordnet sind, die in den Zwischenraum zwischen Transportschnecke und GehƤuse hineinragen. Wenn sich die Transportschnecke dreht, wird das zu transportierende Gut durch die Leisten der Transportschnecke am Mitdrehen gehindert. Solche Leisten unterliegen aber einem hohen VerschleiƟ.It has been shown that in a smoldering plant Waste transport equipment blocked or disrupted may be too large waste particles from the waste feed chute fall into the helix of the transport or stuffing screw. Avoiding a blockage of the stuffing screw is for continuous operation is required, as it is usually continuous new garbage or waste delivered. For one smooth transportation of waste it is also necessary that it does not adhere to the screw conveyor and engages with the helix turns. To achieve that, it is at Transport screws usual that strips in the housing on the wall are arranged in the space between the screw conveyor and protrude housing. If the screw conveyor rotates, the goods to be transported are passed through the bars of the screw conveyor prevented from turning. However, such strips are subject to high wear.

Aus der DE-A-38 30 151, der DE-A-38 30 152 und der DE-A- 38 30 153 sind Pyrolysereaktorn mit Heizeinrichtung fĆ¼r Abfall bekannt, bei denen Versorgungsleitungen fĆ¼r die direkte Beheizung des Abfalls in der Schweltrommel endseitig mit AustrittsdĆ¼sen fĆ¼r Luft versehen sind. Diese Versorgungsleitungen sind durch ein Heizgas-GehƤuse an der Schweltrommel gefĆ¼hrt. Die bekannten Konstruktionen erfordern besondere und daher aufwendige AbdichtmaƟnahmen. From DE-A-38 30 151, DE-A-38 30 152 and the DE-A-38 30 153 are pyrolysis reactors with a heating device for Known waste where supply lines for direct End heating of the waste in the smoldering drum Air outlet nozzles are provided. These supply lines are by a heating gas housing on the smoldering drum guided. The known constructions require special and therefore complex sealing measures.

Aufgabe der Erfindung ist es, eine Transporteinrichtung fĆ¼r Abfall der eingangs genannten Art derart auszubilden, daƟ zumindest eine Versorgungsleitung, die von auƟen in den Pyrolysereaktor fĆ¼hren soll, mit vergleichsweise geringem Aufwand verlegt werden kann.The object of the invention is to provide a transport device for Form waste of the type mentioned in such a way that at least a supply line leading from the outside into the pyrolysis reactor should lead, with comparatively little effort can be relocated.

Die Aufgabe wird durch die technischen Merkmale des Anspruchs 1 gelƶst. Insbesondere ist im Raum zwischen dem GehƤuse des Transportkanals und dem Pyrolysereaktor mindestens eine von auƟen in den Pyrolysereaktor fĆ¼hrende Versorgungsleitung angeordnet.The object is achieved by the technical features of claim 1. In particular is in the room between the housing of the transport channel and the pyrolysis reactor at least one leading from the outside into the pyrolysis reactor Supply line arranged.

Andere AusfĆ¼hrungsformen sind in den UnteransprĆ¼chen beschrieben.Other embodiments are described in the subclaims.

Eine Blockade der Stopfschnecke sollte nach Mƶglichkeit vermieden werden. Um ein Mitdrehen des Abfalls mit der Transportschnecke zu verhindern, kann vorgesehen sein, daƟ zwischen der Transportschnecke und dem GehƤuse ein Ausweichraum vorhanden ist. Dieser ist dadurch gebildet, daƟ von der LƤngsachse der Transportschnecke senkrecht zur LƤngsachse nach auƟen gemessen zwischen dem grĆ¶ĆŸten Radius der Transportschnecke und der GehƤusewand in AbhƤngigkeit von der radialen Richtung, in der gemessen wird, ein unterschiedlich groƟer Abstand frei bleibt. Damit ist sichergestellt, daƟ sich der transportierte Abfall von Zeit zu Zeit von der Transportschnecke lƶsen kann, so daƟ er nicht mit der Transportschnecke rotiert.Blockage of the stuffing screw should be avoided if possible become. To turn the waste with the screw conveyor to prevent it can be provided that between the transport screw and the housing an escape room is available. This is formed by the fact that Longitudinal axis of the screw conveyor perpendicular to the longitudinal axis measured outwards between the largest radius of the screw conveyor and the housing wall depending on the radial Direction in which measurements are taken is different large distance remains free. This ensures that the transported waste from time to time Screw can loosen so that it is not with the screw rotates.

Vorteilhafterweise brauchen an der Innenwand des GehƤuses keine Leisten angebracht zu werden, was bisher Ć¼blich war, um das Gut daran zu hindern, sich mit der Transportschnecke zu drehen. WƤhrend solche Leisten einem hohen VerschleiƟ unterliegen, kann die vorliegende Transporteinrichtung weitgehend verschleiƟarm arbeiten.Advantageously need on the inner wall of the housing no ledges to be attached, which has been common to date to prevent the good from closing with the screw rotate. While such strips are subject to high wear, can the present transport device largely work with low wear.

Das GehƤuse hat beispielsweise einen kreisfƶrmigen Querschnitt.The housing has a circular cross section, for example.

Nach einem bevorzugten Beispiel hat das GehƤuse einen polygonfƶrmigen Querschnitt. Dieser polygonfƶrmige Querschnitt kann ein trogfƶrmiger Querschnitt mit einem unteren polygonfƶrmigen Teil und einem oberen rechteckigen Teil sein. Er kann auch ein Vieleck mit gleichlangen Seiten sein.According to a preferred example, the housing has a polygonal shape Cross-section. This polygonal cross section can be a trough-shaped cross section with a lower polygonal Part and an upper rectangular part. He can also be a polygon with sides of equal length.

Auch diese AusfĆ¼hrungsformen bewirken, daƟ der zu transportierende Abfall nicht mit der Transportschnecke rotiert.These embodiments also cause the one to be transported Waste does not rotate with the screw conveyor.

Die Versorgungsleitung oder -leitungen kann/kƶnnen allen mƶglichen Zwecken dienen, beispielsweise der Luftzufuhr in den Pyrolysereaktor.The supply line or lines can be all possible Serve purposes, for example the air supply in the Pyrolysis reactor.

Es lƤƟt sich die Transporteinrichtung am Eingang und/oder am Ausgang des Pyrolysereaktors einsetzen. Generell gesprochen handelt es sich somit um eine Transporteinrichtung fĆ¼r den Eintrag oder Austrag von Abfall in bzw. aus einem um seine LƤngsachse drehbaren Pyrolysereaktor, die bevorzugt gekennzeichnet ist durch

  • a) ein am Pyrolysereaktor befestigtes Rohr, das mit dem Pyrolysereaktor um seine LƤngsachse mitdrehbar ist,
  • b) einen endseitig am Rohr befestigten Dichtungsring,
  • c) einen in das Rohr hineinragenden, feststehenden Transportkanal,
  • d) einen am AuƟenumfang des Transportkanals befestigten Gegenring fĆ¼r den Dichtungsring und
  • e) mindestens eine Versorgungsleitung, die von auƟen Ć¼ber den Raum zwischen dem GehƤuse des Transportkanals und dem Rohr in das Innere des Pyrolysereaktors fĆ¼hrt.
    • The transport device can be used at the entrance and / or exit of the pyrolysis reactor. Generally speaking, it is therefore a transport device for the introduction or discharge of waste into or from a pyrolysis reactor which can be rotated about its longitudinal axis and is preferably characterized by
  • a) a tube fastened to the pyrolysis reactor, which can be rotated about its longitudinal axis with the pyrolysis reactor,
  • b) a sealing ring attached to the end of the tube,
  • c) a fixed transport channel protruding into the tube,
  • d) a mating ring attached to the outer circumference of the transport channel for the sealing ring and
  • e) at least one supply line leading from the outside through the space between the housing of the transport channel and the tube into the interior of the pyrolysis reactor.

    • Weitere vorteilhafte Ausgestaltungen sind in den UnteransprĆ¼chen gekennzeichnet. Further advantageous embodiments are in the subclaims featured.

    AusfĆ¼hrungsbeispiele der Erfindung werden im folgenden anhand von zwei Figuren nƤher erlƤutert. Es zeigen:

  • Figur 1 eine Transporteinrichtung fĆ¼r Abfall als Teil einer Schwel-Brenn-Anlage in einem LƤngsschnitt; und
  • Figur 2 einen seitlichen Schnitt in Richtung II-II von Figur 1.
    • Exemplary embodiments of the invention are explained in more detail below with reference to two figures. Show it:
  • Figure 1 shows a transport device for waste as part of a smoldering plant in a longitudinal section; and
  • 2 shows a lateral section in the direction II-II of Figure 1.

    • Nach Figur 1 ist eine Transporteinrichtung 2 fĆ¼r Abfall A vorgesehen, bei der ein Fallschacht oder Abfall-ZufĆ¼hrschacht 4 Ć¼ber lƶsbare Befestigungsmittel 6 an einen feststehenden Transportkanal 8 angeschlossen ist. Der Transportkanal 8 ist hier als Stopfschnecken-Trog ausgebildet. Sein GehƤuse 8a hat einen bevorzugt polygonalen Querschnitt, wie aus Figur 2 hervorgeht. Die LƤngsachse des GehƤuses 8a ist mit 9 bezeichnet. Der Transportkanal 8 mĆ¼ndet in einen Pyrolysereaktor 10, im vorliegenden Fall in eine sich um ihre LƤngsachse 11 drehende Schweltrommel, die mit einer grĆ¶ĆŸeren Anzahl von Heizrohren 12 parallel zur LƤngsachse 11 ausgerĆ¼stet ist. Die Heizrohre 12, von denen in Figur 1 nur zwei und in Figur 2 achtundvierzig dargestellt sind, werden mit Heizgas h beschickt, zum Beispiel mit heiƟer Luft. Sie sind in einem Stirnring 12s festgemacht, an den sich konzentrisch ein Eingangsrohr 13 anschlieƟt. Das Ende des Transportkanals 8 liegt konzentrisch in diesem Eingangsrohr 13. Wie weiter unten dargelegt wird, ist dabei fĆ¼r eine gute Abdichtung gesorgt.According to Figure 1 is a transport device 2 for waste A. provided at a drop chute or waste feed chute 4 via releasable fastening means 6 to a fixed one Transport channel 8 is connected. The transport channel 8 is here designed as a stuffing screw trough. Has housing 8a a preferably polygonal cross-section, as can be seen from Figure 2. The longitudinal axis of the housing 8a is designated by 9. The transport channel 8 opens into a pyrolysis reactor 10, in in the present case in a rotating around its longitudinal axis 11 Smoldering drum with a larger number of heating pipes 12 is equipped parallel to the longitudinal axis 11. The heating pipes 12, of which only two in FIG. 1 and forty-eight in FIG are shown, are charged with heating gas h to Example with hot air. You are in a 12s front ring moored, to which an input pipe 13 connects concentrically. The end of the transport channel 8 is concentric in this input tube 13. As will be explained below, a good seal is ensured.

    Im Inneren des im Normalbetrieb feststehenden Transportkanals 8 ist eine Transport- oder Stopfschnecke 14 angeordnet, deren LƤngsachse 15 sich in dessen LƤngsrichtung erstreckt. Die Welle 16 der Stopfenschnecke 14 ist Ć¼ber ein Getriebe 18 von einem Motor 20 angetrieben. Der Abfall-ZufĆ¼hrschacht 4 ist seitlich vom oder senkrecht Ć¼ber dem Transportkanal 8 an dessen Ende angeordnet. Die EinfĆ¼llƶffung fĆ¼r den Abfall ist mit 22 und die Abgabeƶffnung mit 24 bezeichnet. Inside the transport channel, which is fixed during normal operation 8 a transport or stuffing screw 14 is arranged, the Longitudinal axis 15 extends in the longitudinal direction. The Shaft 16 of the plug screw 14 is via a gear 18 from driven by a motor 20. The waste feed chute 4 is laterally from or vertically above the transport channel 8 on the latter Arranged at the end. The filling opening for the waste is included 22 and the discharge opening designated 24.

    Beim Transport von Abfall A vom Fallschacht 4 zur Schweltrommel 10 ist es erforderlich, daƟ weder Luftsauerstoff von der EinfĆ¼llƶffnung 22 Ć¼ber die Abgabeƶffnung 24 zur Schweltrommel 10 gelangt, noch daƟ Schwelgas aus der Schweltrommel 10 im Gegenstrom zum transportierten Abfall A durch die EinfĆ¼llƶffnung 22 in die Umgebung gelangt. Um das zu verhindern, hat ein mittleres TeilstĆ¼ck 14a der Transportschnecke 14 eine geringere Steigung als die Ć¼brige Transportschnecke 14 oder das AnfangsstĆ¼ck 14b. Damit wird erreicht, daƟ der transportierte Abfall A im Bereich dieses mittleren TeilstĆ¼cks 14a stƤrker verdichtet wird als in den anderen Bereichen, was dazu fĆ¼hrt, daƟ im Bereich des TeilstĆ¼cks 14a der Transportschnecke 14 praktisch der gesamte Teilraum im GehƤuse 8a des Transportkanals 8 durch den Abfall A ausgefĆ¼llt ist. Der transportierte Abfall A selbst verschlieƟt dort das GehƤuse 8a gasdicht. Es kann dann weder Luft von der EinfĆ¼llƶffnung 22 zur Abgabeƶffnung 24, noch Schwelgas in umgekehrter Richtung strƶmen. In Transportrichtung hinter der Verdichtungszone, die sich im Bereich des TeilstĆ¼cks 14a der Transportschnecke 14 befindet, hat die Transportschnecke 14 wieder eine grĆ¶ĆŸere Steigung. Die Ć¼ber den gesamten Querschnitt des Transportkanals 8 sich erstreckende Packung des Abfalls A wird dadurch wieder aufgelƶst.When transporting waste A from the chute 4 to the smoldering drum 10 it is necessary that neither atmospheric oxygen from the Filling opening 22 via the discharge opening 24 to the smoldering drum 10 arrives, nor that carbonization gas from the carbonization drum 10 in Counterflow to the transported waste A through the filling opening 22 got into the environment. To prevent that from happening a middle section 14a of the screw conveyor 14 a smaller one Slope than the rest of the screw 14 or that Starting piece 14b. This ensures that the transported Waste A stronger in the area of this middle section 14a is condensed than in the other areas, which leads to that in the region of section 14a of the screw conveyor 14 practically the entire sub-space in the housing 8a of the transport channel 8 is filled in by waste A. The transported Waste A closes the housing 8a there gas-tight. It can then neither air from the fill opening 22 to the discharge opening 24, still flow carbonization gas in the reverse direction. In Direction of transport behind the compression zone, which is in the Area of the section 14a of the screw conveyor 14, the screw conveyor 14 has a larger slope again. Which over the entire cross section of the transport channel 8 itself this extends the package of waste A again.

    Von Bedeutung ist nun, daƟ infolge der getroffenen geometrischen Anordnung im Raum 30 zwischen dem GehƤuse 8a des Transportkanals 8 und dem Pyrolysereaktor 10 mindestens eine von auƟen in den Pyrolysereaktor 10 fĆ¼hrende Versorgungsleitung 32 angeordnet ist. Vorliegend sind gemƤƟ Figur 2 drei Versorgungsleitungen 32 vorhanden. Der betrachtete Raum 30 liegt hier zwischen dem GehƤuse 8a und dem Eingangsrohr 13. Die Versorgungsleitungen 32 liegen hier in den "freien Ecken" auƟerhalb des GehƤuses 8a. Die Versorgungsleitungen 32 sind zum Beispiel zum Einbringen von Luft 1, Inertgas, Wasser oder Wasserdampf, der Ć¼berhitzt sein kann, vorgesehen. Die eingebrachte Luft 1 kann zur Teilverbrennung von Schwelgas im Pyrolysereaktor 10 dienen. Zwei Luftaustritts- oder BrenndĆ¼sen an der Versorgungsleitung 32 sind in Figur 1 mit 35 bezeichnet. Durch das Einbringen von Ć¼berhitztem Dampf wird der Abfall im Pyrolysereaktor direkt erwƤrmt und getrocknet.It is now important that as a result of the geometric Arrangement in space 30 between the housing 8a of the transport channel 8 and the pyrolysis reactor 10 at least one of supply line leading outside into the pyrolysis reactor 10 32 is arranged. According to FIG. 2, there are three supply lines 32 available. The room 30 under consideration lies here between the housing 8a and the input tube 13. Die Supply lines 32 are here in the "free corners" outside the housing 8a. The supply lines 32 are for example for introducing air 1, inert gas, water or Water vapor, which may be overheated, is provided. The brought in Air 1 can be used for the partial combustion of carbonization gas in the pyrolysis reactor 10 serve. Two air outlet or burning nozzles on the supply line 32 are designated by 35 in FIG. By introducing superheated steam, the waste directly heated and dried in the pyrolysis reactor.

    Von Bedeutung ist auch eine gute Abdichtung des Pyrolysereaktors 10 nach auƟen. Zu diesem Zweck ist am Ende des Eingangsrohrs 13 eine Gleitringdichtung 40 angeordnet. Sie besteht aus einem sich mitdrehenden Gleitring 42 und einem ortsfesten Gegenring 44, die beide aus Stahl gefertigt sein kƶnnen. Der Gegenring 44 ist auf einem Ring 46 festgemacht, der mit Hilfe einer SchweiƟnaht 48 am GehƤuse 8a verschweiƟt ist.Good sealing of the pyrolysis reactor is also important 10 outwards. For this purpose is at the end of the inlet pipe 13 a mechanical seal 40 is arranged. she consists of a rotating sliding ring 42 and a stationary Counter ring 44, both of which can be made of steel. Of the Counter ring 44 is fixed on a ring 46, which with the help a weld seam 48 is welded to the housing 8a.

    Um das GehƤuse 8a des Transportkanals 8 durch den transportierten Abfall A gasdicht verschlieƟen zu kƶnnen, sollte die Transporteinrichtung 2 voll gefĆ¼llt betrieben werden. Damit relativ groƟe, harte Teile des Abfalls A die Transportschnecke 14 nicht blockieren kƶnnen, kƶnnen innerhalb des GehƤuses 8a infolge der geometrischen Formgebung verschieden gelegene und konfigurierte Ausweichraume 34 fĆ¼r solche relativ groƟen Teile vorgesehen sein. Mit anderen Worten: Der Transportkanal 8 kann nicht nur den gezeigten polygonfƶrmigen Querschnitt, sondern auch andere Querschnitte aufweisen. Bei sich drehender Transportschnecke 14 werden die relativ groƟen, zu transportierenden Teile in diese Ausweichraume 34 gedrĆ¼ckt und mit dem in LƤngsrichtung bewegten Abfall A in den AusweichrƤumen 34 mittransportiert, so daƟ sie die Transportschnecke 14 nicht blockieren kƶnnen. Die Ausweichraume 34 befinden sich in der Regel oberhalb oder seitlich der Transportschnecke 14.Around the housing 8a of the transport channel 8 through the transported To be able to seal waste A gas-tight, the Transport device 2 are operated fully filled. In order to relatively large, hard parts of waste A the screw conveyor 14 can not block, can within the housing 8a different due to the geometric shape located and configured alternative spaces 34 for such relative large parts can be provided. In other words: the Transport channel 8 can not only the polygonal shown Cross section, but also have other cross sections. At rotating screw 14, the relatively large, parts to be transported are pressed into this alternative space 34 and with the longitudinally moving waste A in the Evacuation spaces 34 transported, so that they are the screw conveyor 14 can not block. The escape rooms 34 are located usually above or to the side of the screw conveyor 14.

    Nach Figur 1 wird der Abfall A in der sich drehenden Schweltrommel 10 mittels der Heizrohre 12 indirekt vom Heizgas h beheizt. Dieses Heizgas h wird Ć¼ber ein ortsfestes Heizgas-EintrittsgehƤuse (nicht gezeigt) in die Schweltrommel 10 geleitet. An deren Rohrbodenwand sind die parallel verlaufenden Heizrohre 12 mit einem Ende befestigt. Das andere Ende ist in der Rohrbodenwand 12s festgemacht, die einen Teil der Wand eines "kalten" Heizgas-AustrittsgehƤuses 50 bildet. Von diesem GehƤuse 50 gelangt das Heizgas h in einen AuslaƟ. Zur Abdichtung des Heizgas-AustrittsgehƤuses 50 gegen das sich drehende Rohr 10 und das Eingangsrohr 13 sind Ringdichtungen 52 bzw. 54 vorgesehen. Entsprechend sind zur Abdichtung des Heizgas-EintrittsgehƤuses (nicht gezeigte) Ringdichtungen vorgesehen. Vom Innenraum der Schweltrommel 10, genauer: vom "heiƟen" Rohrboden, ist ein (nicht gezeigtes) Austragsrohr in den Innenraum einer feststehenden Austragsvorrichtung geleitet. Das Ć¼ber das Austragsrohr in diese Austragsvorrichtung gelangende Schwelgut wird dort in Schwelgas und Reststoff aufgeteilt. Letzterer kann gemƤƟ dem Schwel-Brenn-Verfahren mittels einer geeigneten Vorrichtung (nicht gezeigt) in verschiedene brennbare und inerte Fraktionen aufgeteilt und aussortiert werden, bevor der brennbare Anteil einer Verbrennung in einer (nicht gezeigten) Hochtemperatur-Brennkammer zugefĆ¼hrt wird.According to Figure 1, the waste A in the rotating smoldering drum 10 by means of the heating pipes 12 indirectly from the heating gas h heated. This heating gas h is via a stationary heating gas inlet housing (not shown) passed into the smoldering drum 10. On the tube plate wall are the parallel ones Heating tubes 12 attached with one end. The other end is in the tube sheet wall 12s moored that part of the wall a "cold" heating gas outlet housing 50 forms. Of this Housing 50 passes the heating gas h into an outlet. For sealing of the hot gas outlet housing 50 against the rotating Tube 10 and the input tube 13 are ring seals 52 or 54 provided. Accordingly, to seal the Heating gas inlet housing (not shown) ring seals intended. From the interior of the smoldering drum 10, more precisely: from "hot" tube sheet is a discharge tube (not shown) in directed the interior of a fixed discharge device. That through the discharge pipe into this discharge device The carbonized material that gets there becomes carbonization gas and residual material divided up. The latter can be done according to the smoldering-burning method by means of a suitable device (not shown) in different combustible and inert fractions divided and sorted out be before the combustible portion of a combustion in a high temperature combustion chamber (not shown) becomes.

    Es soll noch darauf hingewiesen werden, daƟ anstelle oder zusƤtzlich zu mindestens einer Versorgungsleitung 32 natĆ¼rlich im Raum 30 zwischen dem GehƤuse 8a des Transportkanals 8 und dem Pyrolysereaktor 10 (oder dessen Eingangsrohr 13) auch eine Entsorgungsleitung angeordnet sein kann. Diese Entsorgungsleitung kann zum Beispiel als Absaugrohr fĆ¼r die Ableitung von Wasserdampf aus dem Innenraum des Pyrolysereaktors 10 dienen. Auch ist anzumerken, daƟ die Anordnung einer Versorgungs- und/oder Entsorgungsleitung 32 anstelle am Eingang auch am Ausgang des Pyrolysereaktors 10 vorgesehen sein kann, und zwar unter Verwendung eines Ausgangsrohrs, das dem Eingangsrohr 13 entspricht.It should be noted that instead of or in addition to at least one supply line 32, of course in the space 30 between the housing 8a of the transport channel 8 and the pyrolysis reactor 10 (or its inlet tube 13) also one Disposal line can be arranged. This disposal line can be used, for example, as a suction pipe for discharge of water vapor from the interior of the pyrolysis reactor 10 serve. It should also be noted that the arrangement of a supply and / or disposal line 32 instead of at the entrance can also be provided at the outlet of the pyrolysis reactor 10, using an output pipe that joins the input pipe 13 corresponds.

    Claims (8)

    1. Transport device (2) for waste (A), with a waste feed chute (4) being connected to a transport channel (8), in the longitudinal direction of which transport channel a screw conveyor (14), which can be driven by a motor (20), is arranged, with the transport channel (8) opening into a pyrolysis reactor (10), in particular into a low-temperature carbonization drum which is rotatable about its longitudinal axis (11), and with at least one supply line (32), which leads from the outside into the pyrolysis reactor (10), being arranged in the area between the housing (8a) of the transport channel (8) and the pyrolysis reactor (10),
      characterized in that the pyrolysis reactor (10) is firmly connected on the input side to an inlet tube (13), which has a smaller cross section than the pyrolysis reactor (10), in that the transport channel (8) is sealed on the end and is fixedly arranged within the inlet tube (13), and in that the supply line (32) is guided through the area (30) between the inlet tube (13) and the transport channel (8).
    2. Transport device according to claim 1,
      characterized in that the housing (8a) of the transport channel (8) has a non-round, in particular a polygonal, cross section.
    3. Transport device according to claim 1 or 2,
      characterized in that the inlet tube (13) is provided with a sliding seal (40) at the end.
    4. Transport device according to claim 1, 2 or 3,
      characterized in that a chamber (50) for the passage of heating gas (h) is fastened in a sliding manner on the inlet tube (13).
    5. Transport device according to one of claims 1 to 4, characterized in that the supply line (32) is provided for the transportation of inert gas, water, water vapour, in particular air (1).
    6. Transport device according to one of claims 1 to 5, characterized in that the supply line (32) in the pyrolysis reactor (10) is provided with an outlet nozzle (35).
    7. Transport device according to one of claims 1 to 6, characterized in that the screw conveyor (14) has sections (14a, 14b) of variable rise.
    8. Transport device (2) according to one of claims 1 to 7, characterized by a sealing ring (42) fastened at the end to the inlet tube (13) and by a counter ring (44) for the sealing ring (42), with the counter ring being fastened to the outer circumference of the transport channel (8).
    EP94926780A 1993-09-27 1994-09-14 Device for conveying refuse into a pyrolysis reactor Expired - Lifetime EP0721491B1 (en)

    Applications Claiming Priority (3)

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    DE4332865 1993-09-27
    DE4332865A DE4332865A1 (en) 1993-09-27 1993-09-27 Device for transporting waste in a pyrolysis reactor
    PCT/DE1994/001058 WO1995009217A1 (en) 1993-09-27 1994-09-14 Device for conveying refuse into a pyrolysis reactor

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    EP0721491A1 EP0721491A1 (en) 1996-07-17
    EP0721491B1 true EP0721491B1 (en) 1999-12-01

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    KR100304307B1 (en) 2001-11-22
    ES2140554T3 (en) 2000-03-01
    HU9600748D0 (en) 1996-05-28
    CN1056872C (en) 2000-09-27
    PT721491E (en) 2000-05-31
    HUT74783A (en) 1997-02-28
    HU216412B (en) 1999-06-28
    CN1131963A (en) 1996-09-25
    KR960704999A (en) 1996-10-09
    DE59408969D1 (en) 2000-01-05
    SK36796A3 (en) 1997-06-04
    PL313586A1 (en) 1996-07-08
    US5709779A (en) 1998-01-20
    JPH09501982A (en) 1997-02-25
    WO1995009217A1 (en) 1995-04-06
    CA2172634A1 (en) 1995-04-06
    EP0721491A1 (en) 1996-07-17
    JP3121018B2 (en) 2000-12-25
    DE4332865A1 (en) 1995-03-30
    CZ74896A3 (en) 1996-07-17
    RU2100402C1 (en) 1997-12-27
    DK0721491T3 (en) 2000-05-29
    ATE187195T1 (en) 1999-12-15
    SK281845B6 (en) 2001-08-06

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