EP0086260B1 - Device for introducing coal in an heating chamber under high pressure - Google Patents

Device for introducing coal in an heating chamber under high pressure Download PDF

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Publication number
EP0086260B1
EP0086260B1 EP82110460A EP82110460A EP0086260B1 EP 0086260 B1 EP0086260 B1 EP 0086260B1 EP 82110460 A EP82110460 A EP 82110460A EP 82110460 A EP82110460 A EP 82110460A EP 0086260 B1 EP0086260 B1 EP 0086260B1
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EP
European Patent Office
Prior art keywords
mill
coal
shut
pressure
combustion chamber
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EP82110460A
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German (de)
French (fr)
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EP0086260A3 (en
EP0086260A2 (en
Inventor
Klaus Dieter Beckmann
Dieter Wagner
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Deutsche Babcock AG
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Deutsche Babcock AG
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Priority to AT82110460T priority Critical patent/ATE25551T1/en
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Publication of EP0086260A3 publication Critical patent/EP0086260A3/en
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    • 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
    • F27D99/00—Subject matter not provided for in other groups of this subclass
    • F27D99/0001—Heating elements or systems
    • F27D99/0003—Heating elements or systems with particulate fuel, e.g. aspects relating to the feeding
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K1/00—Preparation of lump or pulverulent fuel in readiness for delivery to combustion apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B15/00—Fluidised-bed furnaces; Other furnaces using or treating finely-divided materials in dispersion
    • F27B15/003—Cyclones or chain of cyclones
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/10—Charging directly from hoppers or shoots

Definitions

  • the invention relates to a device for introducing coal into a combustion chamber under increased pressure, in which a mill is provided with a feed line for raw coal and for carrier gas and in feed line for the raw coal immediately before entering the mill, two intermediate bunkers are arranged one behind the other , in the entrances of which a pressure-tight closing member is arranged.
  • the indirect blowing in of the coal via an intermediate storage increases the apparatus structure and the construction volume of the mill drying plant.
  • the direct blowing of coal without intermediate storage has so far only been used in systems with low combustion chamber pressure. Under these pressure conditions, it is sufficient to install a barrier section formed by a coal column or to maintain a minimum height in the raw coal bunker in order to achieve a seal against the atmosphere. Higher pressures cannot be mastered in this way.
  • the invention has for its object to design the generic device so that it is possible to bring ground coal directly into a combustion chamber under increased pressure.
  • This object is achieved according to the invention in a generic device in that the mill is connected directly to the combustion chamber via one or more dust lines, that the first intermediate bunker in the direction of flow of the raw coal is provided with a lockable vent line and that the closure members are designed as pressure-tight closing slides , in front of which an intermediate conveyor is arranged as seen in the flow direction of the coal.
  • the intermediate bunkers provided with the pressure-tight shutters ensure a pressure seal. Since these intermediate bunkers are relocated to the raw coal path, the ground coal can be blown directly into the combustion chamber under increased pressure after the mill.
  • the intermediate conveyors arranged in the flow direction of the raw coal in front of the slide, which closes in a pressure-tight manner, ensure that the raw coal rests on the intermediate conveyor and not on the slide at the bunker discharge. When closing the slide, it does not need to cut through a bed and after closing it is not burdened by the coal column.
  • the raw coal is made available in a storage bunker 1.
  • the raw coal is withdrawn from the storage bunker 1 in a predetermined amount via a cross conveyor 2.
  • Lime or limestone from a lime bunker 3 is added to the raw coal on the cross conveyor 2 via a further cross conveyor 24.
  • Repair slides 4 are provided below the storage bunker 1 and the lime bunker 3.
  • the raw coal and the lime are fed to a mill 5 via a lock system to be described later. If, as shown, the lock system and the storage bunker 1 are arranged at the same height, then a steep conveyor or inclined conveyor 6 must be provided.
  • the mill 5 is provided with an inlet nozzle 7 for the raw coal and with an inlet nozzle for a carrier gas.
  • Air is preferred as the carrier gas. This air is conveyed by a fan 8 and heated in a heat exchanger 9 before entering the mill 5.
  • Hot flue gases can also be used as carrier gas on their own or together with the air.
  • the coal is ground in the mill 5 and dried by contact with the heated air or the hot flue gases.
  • One or more dust lines 10, which are connected to a combustion chamber 11, are connected to the mill 5.
  • the dust-gas mixture generated in the mill 5 is fed to the combustion chamber 11 via the dust line 10.
  • the combustion chamber 11 can be represented by the combustion chamber of a dust burner or a fluidized bed burner or the reaction chamber of a coal gasifier or a blast furnace.
  • the combustion chamber 11 is under an increased pressure of, for example, 40 mbar or under an overpressure of, for example, 20 bar.
  • the lock system consists of two closed intermediate bunkers 12, 13 arranged one behind the other.
  • the volume of the first intermediate bunker 12 in the flow direction of the raw coal is greater than that of the second intermediate bunker 13 connected downstream.
  • the intermediate bunkers 12, 13 are provided with inlet chutes 14 and outlet chutes 15.
  • Arranged in the entry chutes 14 leading to each of the two intermediate bunkers 12, 13 is a pressure-tight closing element which consists of a flap or a slide 16 or 17.
  • the first intermediate bunker 12 is provided with a lockable vent line 18 and is connected to the downstream second intermediate bunker 13 via an equalization line 19 which can also be shut off.
  • the second intermediate bunker 13 is emptied via a discharge element 20, which continuously feeds raw coal to the mill 5 in a predetermined amount.
  • a repair slide 4 is provided in the discharge chute 15 of the first and second intermediate bunkers 12, 13 above the discharge member 20.
  • An intermediate conveyor 21 is arranged between the outlet pipe 15 of the first intermediate bunker 12 and the inlet pipe 14 of the second intermediate bunker 13 above the gas-tight slide 17.
  • the bed of raw coal present in the first intermediate bunker 12 rests on this intermediate conveyor 21.
  • the intermediate conveyor 21 is actuated only as long as the slide 17 of the second intermediate bunker 13 is open. If this slide 17 is to be closed, the intermediate conveyor 21 is stopped beforehand. In this way, the slide 17 does not have to be pushed through the coal column, nor is it loaded by the coal column.
  • the same task as the intermediate conveyor 21 is performed with respect to the slide 16 of the first intermediate hopper 12 by the inclined conveyor 6 or, in the absence thereof, the cross conveyor 2.
  • the intermediate bunkers 12, 13 can be charged with inert gas.
  • an inert gas line 22 is provided, which is connected to the intermediate bunkers 12, 13 via lockable branch lines 23.
  • the inert gas is at a higher pressure than prevails in the combustion chamber 11.
  • Treated flue gas from the combustion chamber 11 can be used as the inert gas.
  • the lock system described works in the following way. Due to the arrangement of the slides 16, 17, the equalization line 19 and the vent line 18, the second intermediate bunker 13 is constantly under the increased pressure, while the first intermediate bunker 12 can optionally be placed under the increased pressure and under atmospheric pressure.
  • the first intermediate bunker 12 can be filled from the storage bunker 1 and the lime bunker 3 via the inclined conveyor 6 when the slide 16 of the first intermediate container 12 and the shut-off device in the ventilation line 18 are open and the slide 17 of the second intermediate bunker 13 and the shut-off device in Compensation line 19 are closed and the intermediate conveyor 21 is out of operation.
  • the discharge member 20 also continuously feeds from the second intermediate bunker 13 into the mill 5.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Dispersion Chemistry (AREA)
  • Solid Fuels And Fuel-Associated Substances (AREA)
  • Fluidized-Bed Combustion And Resonant Combustion (AREA)
  • Gasification And Melting Of Waste (AREA)
  • Combustion Of Fluid Fuel (AREA)

Abstract

1. Device for feeding coal into a combustion chamber (11) under elevated pressure in which a mill (5) is provided with one feed line for raw coal and one for carrier gas each and in the feed line for raw coal two intermediate bunkers (12, 13) are arranged in series directly before the inlet of mill (5) in whose inlets (14) one pressure-tight closing shut-off device each is arranged, characterized in that mill (5) is directly connected with the combustion chamber (11) via one or several pulverized fuel lines, that the first intermediate bunker (12) seen in the direction of raw coal flow is provided with a vent line (18) capable of being shut off and that the shut-off devices are designed as pressure-tight closing gate valves (16, 17) before which - seen in the direction of coal flow - one intermediate conveyor each (21, 6) is arranged.

Description

Die Erfindung betrifft eine Vorrichtung zum Einbringen von Kohle in einen unter erhöhtem Druck stehenden Verbrennungsraum, bei der eine Mühle mit je einer Zuführungsleitung für Rohkohle und für Trägergas versehen ist und in Zuführungsleitung für die Rohkohle unmittelbar vor dem tritt in die Mühle zwei Zwischenbunker hintereinander geordnet sind, in deren Eingänge jeweils ein druckdicht schließendes Verschlußorgan angeordnet ist.The invention relates to a device for introducing coal into a combustion chamber under increased pressure, in which a mill is provided with a feed line for raw coal and for carrier gas and in feed line for the raw coal immediately before entering the mill, two intermediate bunkers are arranged one behind the other , in the entrances of which a pressure-tight closing member is arranged.

In einer bekannten Anlage (US-A- 3 306 238) ist die Aufbereitung der Kohle von der Einbringung in den Reaktionsraum getrennt. Die zu mahlende Kohle wird in die Mühle über zwei mit absperrbaren Leitungen versehene unter Druck zu setzende Bunker eingespeist. Die gemahlene Kohle wird einem Abscheider zugeführt, in dem das Staub-Gas-Gemisch getrennt wird. Der abgeschiedene Kohlenstaub wird mit Hilfe von Luft in den Reaktionsraum geblasen.In a known plant (US-A-3 306 238) the processing of the coal is separated from the introduction into the reaction space. The coal to be ground is fed into the mill via two pressurized bunkers with lockable lines. The ground coal is fed to a separator where the dust-gas mixture is separated. The separated coal dust is blown into the reaction space with the help of air.

Bei einer anderen bekannten Anlage (US-A- 3 204 942; Journal of Metals, April 1968, Seiten 85-87) zum indirekten Einblasen von Kohlenstaub in einen Reaktionsraum sind die Bunker für die Einspeisung der Kohle in die Mühle mit Zwischenförderern und Absperrorganen ausgerüstet.In another known system (US-A-3 204 942; Journal of Metals, April 1968, pages 85-87) for the indirect blowing of coal dust into a reaction space, the bunkers for feeding the coal into the mill are equipped with intermediate conveyors and shut-off devices .

Das indirekte Einblasen der Kohle über eine Zwischenlagerung erhöht den apparativen Aufbau und das Bauvolumen der Mahltrocknungsanlage. Das direkte Einblasen der Kohle ohne Zwischenlagerung ist bisher nur bei Anlagen mit geringem Verbrennungsraumdruck eingesetzt worden. Unter diesen Druckverhältnissen reicht der Einbau einer durch eine Kohlensäule gebildeten Sperrstrecke oder das Einhalten eines Mindesthöhenstandes im Rohkohlebunker aus, um eine Abdichtung gegenüber der Atmosphäre zu erreichen. Höhere Drücke sind auf diese Weise nicht zu beherrschen.The indirect blowing in of the coal via an intermediate storage increases the apparatus structure and the construction volume of the mill drying plant. The direct blowing of coal without intermediate storage has so far only been used in systems with low combustion chamber pressure. Under these pressure conditions, it is sufficient to install a barrier section formed by a coal column or to maintain a minimum height in the raw coal bunker in order to achieve a seal against the atmosphere. Higher pressures cannot be mastered in this way.

Der Erfindung liegt die Aufgabe zugrunde, die gattungsgemäße Vorrichtung so zu gestalten, daß es ihr möglich ist, gemahlene Kohle direkt in einen unter erhöhtem Druck stehenden Verbrennungsraum einzubringen.The invention has for its object to design the generic device so that it is possible to bring ground coal directly into a combustion chamber under increased pressure.

Diese Aufgabe wird bei einer gattungsgemäßen Vorrichtung erfindungsgemäß dadurch gelöst, daß die Mühle über eine oder mehrere Staubleitungen direkt mit dem Verbrennungsraum verbunden ist, daß der in Fließrichtung der Rohkohle erste Zwischenbunker mit einer absperrbaren Entlüftungsleitung versehen ist und daß die Verschlußorgane als druckdicht schließende Schieber ausgebildet sind, vor denen in Fließrichtung der Kohle gesehen jeweils ein Zwischenförderer angeordnet ist.This object is achieved according to the invention in a generic device in that the mill is connected directly to the combustion chamber via one or more dust lines, that the first intermediate bunker in the direction of flow of the raw coal is provided with a lockable vent line and that the closure members are designed as pressure-tight closing slides , in front of which an intermediate conveyor is arranged as seen in the flow direction of the coal.

Bei dieser Vorrichtung sorgen die mit den druckdicht schließenden Schiebern versehenen Zwischenbunker für eine Druckabdichtung. Da diese Zwischenbunker in den Rohkohleweg verlegt sind, kann die gemahlene Kohle im Anschluß an die Mühle direkt in den unter erhöhtem Druck stehenden Verbrennungsraum eingeblasen werden. Die in Fließrichtung der Rohkohle vor dem druckdicht schließenden Schieber angeordneten Zwischenförderer sorgen dafür, daß die Rohkohle am Bunkeraustrag auf dem Zwischenförderer und nicht auf den Schieber aufruht. Beim Schließen des Schiebers braucht dieser keine Schüttung zu durchschneiden und nach dem Schließen ist er nicht durch die Kohlensäule belastet.In this device, the intermediate bunkers provided with the pressure-tight shutters ensure a pressure seal. Since these intermediate bunkers are relocated to the raw coal path, the ground coal can be blown directly into the combustion chamber under increased pressure after the mill. The intermediate conveyors arranged in the flow direction of the raw coal in front of the slide, which closes in a pressure-tight manner, ensure that the raw coal rests on the intermediate conveyor and not on the slide at the bunker discharge. When closing the slide, it does not need to cut through a bed and after closing it is not burdened by the coal column.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird im folgenden näher erläutert.An embodiment of the invention is shown in the drawing and is explained in more detail below.

In der Zeichnung ist schematisch eine Vorrichtung gemäß der Erfindung wiedergegeben.In the drawing, a device according to the invention is shown schematically.

Die Rohkohle wird in einem Vorratsbunker 1 bereit gestellt. Aus dem Vorratsbunker 1 wird die Rohkohle über einen Querförderer 2 in einer vorbestimmten Menge abgezogen. Auf dem Querförderer 2 wird der Rohkohle über einen weiteren Querförderer 24 Kalk oder Kalkstein aus einem Kalkbunker 3 zugemischt. Unterhalb des Vorratsbunkers 1 und des Kalkbunkers 3 sind Reparaturschieber 4 vorgesehen.The raw coal is made available in a storage bunker 1. The raw coal is withdrawn from the storage bunker 1 in a predetermined amount via a cross conveyor 2. Lime or limestone from a lime bunker 3 is added to the raw coal on the cross conveyor 2 via a further cross conveyor 24. Repair slides 4 are provided below the storage bunker 1 and the lime bunker 3.

Die Rohkohle und der Kalk werden über ein später noch zu beschreibendes Schleusensystem einer Mühle 5 zugeführt. Sind das Schleusensystem und der Vorratsbunker 1, wie dargestellt, auf gleicher Höhe angeordnet, so ist ein Steilförderer oder Schrägförderer 6 vorzusehen.The raw coal and the lime are fed to a mill 5 via a lock system to be described later. If, as shown, the lock system and the storage bunker 1 are arranged at the same height, then a steep conveyor or inclined conveyor 6 must be provided.

Die Mühle 5 ist mit einem Eintrittsstutzen 7 für die Rohkohle sowie mit einem Eintrittsstutzen für ein Trägergas versehen. Als Trägergas kommt bevorzugt Luft in Frage. Diese Luft wird durch einen Ventilator 8 gefördert und vor dem Eintritt in die Mühle 5 in einem Wärmetauscher 9 erwärmt. Es können auch heiße Rauchgase als Trägergas für sich oder zusammen mit der Luft verwendet werden.The mill 5 is provided with an inlet nozzle 7 for the raw coal and with an inlet nozzle for a carrier gas. Air is preferred as the carrier gas. This air is conveyed by a fan 8 and heated in a heat exchanger 9 before entering the mill 5. Hot flue gases can also be used as carrier gas on their own or together with the air.

In der Mühle 5 wird die Kohle gemahlen und durch den Kontakt mit der erwärmten Luft bzw. den heißen Rauchgasen getrocknet. An die Mühle 5 sind eine oder mehrere Staubleitungen 10 angeschlossen, die mit einem Verbrennungsraum 11 verbunden ist. Über die Staubieitung 10 wird das in der Mühle 5 erzeugte Staub-Gas-Gemisch dem Verbrennungsraum 11 zugeführt.The coal is ground in the mill 5 and dried by contact with the heated air or the hot flue gases. One or more dust lines 10, which are connected to a combustion chamber 11, are connected to the mill 5. The dust-gas mixture generated in the mill 5 is fed to the combustion chamber 11 via the dust line 10.

Der Verbrennungsraum 11 kann durch die Brennkammer einer Staubfeuerung oder einer Wirbelschichtfeuerung oder den Reaktionsraum eines Kohlevergasers oder eines Hochofens dargestellt sein. Der Verbrennungsraum 11 steht unter einem erhöhten Druck von beispielsweise 40 mbar oder unter einem Überdruck von beispielsweise 20 bar.The combustion chamber 11 can be represented by the combustion chamber of a dust burner or a fluidized bed burner or the reaction chamber of a coal gasifier or a blast furnace. The combustion chamber 11 is under an increased pressure of, for example, 40 mbar or under an overpressure of, for example, 20 bar.

Da bei dem beschriebenen System des Einbringens der Kohle in den Verbrennungsraum 11 die Mühle 5 unter dem gleichen Druck steht wie der Verbrennungsraum 11, muß für eine Abdichtung zur Atmosphäre hin gesorgt werden. Diesem Zweck dient das bereits erwähnte Schleusensystem, das in dem Rohkohleweg zwischen dem Vorratsbunker 1 und der Mühle 5 vorgesehen ist.Since in the described system of introducing the coal into the combustion chamber 11, the mill 5 is under the same pressure as the combustion chamber 11, a seal against the atmosphere must be provided. The above-mentioned serves this purpose Lock system, which is provided in the raw coal path between the storage bunker 1 and the mill 5.

Das Schleusensystem besteht aus zwei hintereinander angeordneten, geschlossenen Zwischenbunkern 12, 13. Das Volumen des in Fließrichtung der Rohkohle ersten Zwischenbunkers 12 ist größer als das des nachgeschalteten zweiten Zwischenbunkers 13. Die Zwischenbunker 12,13 sind mit Eintrittsschurren 14 und Austrittsschurren 15 versehen. In den zu jeden der beiden Zwischenbunker 12,13 führenden Eintrittsschurren 14 ist ein druckdicht schließendes Verschlußorgan angeordnet, das aus einer Klappe oder einem Schieber 16 bzw. 17 besteht. Der erste Zwischenbunker 12 ist mit einer absperrbaren Entlüftungsleitung 18 versehen und über eine ebenfalls absperrbare Ausgleichsleitung 19 mit dem nachgeschalteten zweiten Zwischenbunker 13 verbunden.The lock system consists of two closed intermediate bunkers 12, 13 arranged one behind the other. The volume of the first intermediate bunker 12 in the flow direction of the raw coal is greater than that of the second intermediate bunker 13 connected downstream. The intermediate bunkers 12, 13 are provided with inlet chutes 14 and outlet chutes 15. Arranged in the entry chutes 14 leading to each of the two intermediate bunkers 12, 13 is a pressure-tight closing element which consists of a flap or a slide 16 or 17. The first intermediate bunker 12 is provided with a lockable vent line 18 and is connected to the downstream second intermediate bunker 13 via an equalization line 19 which can also be shut off.

Der zweite Zwischenbunker 13 wird über ein Austragsorgan 20 entleert, das der Mühle 5 Rohkohle in einer vorbestimmteh Menge kontinuierlich zuführt. In der Austrittsschurre 15 des ersten und zweiten Zwischenbunkers 12,13 ist oberhalb des Austragsorganes 20 ein Reparaturschieber 4 vorgesehen.The second intermediate bunker 13 is emptied via a discharge element 20, which continuously feeds raw coal to the mill 5 in a predetermined amount. A repair slide 4 is provided in the discharge chute 15 of the first and second intermediate bunkers 12, 13 above the discharge member 20.

Zwischen dem Austrittsrohr 15 des ersten Zwischenbunkers 12 und dem Eintrittsrohr 14 des zweiten Zwischenbunkers 13 ist oberhalb des gasdicht schließenden Schiebers 17 ein Zwischenförderer 21 angeordnet. Auf diesem Zwischenförderer 21 ruht die in dem ersten Zwischenbunker 12 vorhandene Schüttung der Rohkohle auf. Der Zwischenförderer 21 wird nur so lange betätigt, wie der Schieber 17 des zweiten Zwischenbunkers 13 geöffnet ist. Soll dieser Schieber 17 geschlossen werden, so wird zuvor der Zwischenförderer 21 stillgesetzt. Auf diese Weise braucht der Schieber 17 nicht durch die Kohlesäule geschoben werden, noch ist er durch die Kohlensäule belastet. Die gleiche Aufgabe wie der Zwischenförderer 21 erfüllt in Bezug auf den Schieber 16 des ersten Zwischenbunkers 12 der Schrägförderer 6 oder bei dessen Abwesenheit der Querförderer 2.An intermediate conveyor 21 is arranged between the outlet pipe 15 of the first intermediate bunker 12 and the inlet pipe 14 of the second intermediate bunker 13 above the gas-tight slide 17. The bed of raw coal present in the first intermediate bunker 12 rests on this intermediate conveyor 21. The intermediate conveyor 21 is actuated only as long as the slide 17 of the second intermediate bunker 13 is open. If this slide 17 is to be closed, the intermediate conveyor 21 is stopped beforehand. In this way, the slide 17 does not have to be pushed through the coal column, nor is it loaded by the coal column. The same task as the intermediate conveyor 21 is performed with respect to the slide 16 of the first intermediate hopper 12 by the inclined conveyor 6 or, in the absence thereof, the cross conveyor 2.

Um einer möglichen Gefahr einer Selbstentzündung einer Rohkohle mit niedrigem Wassergehalt und relativ hoben Feinanteilen in den Zwischenbunkern 12, 13 entgegen zu wirken, können die Zwischenbunker 12, 13 mit Intertgas beaufschlagt werden. Zu diesem Zweck ist eine Inertgasleitung 22 vorgesehen, die über absperrbare Zweigleitungen 23 mit den Zwischenbunkern 12,13 verbunden ist. Das Inertgas steht unter einem höheren Druck als im Verbrennungsraum 11 herrscht. Als Inertgas kommt aufbereitetes Rauchgas aus dem Verbrennungsraum 11 in Frage.In order to counteract a possible risk of self-ignition of a raw coal with a low water content and relatively high fines in the intermediate bunkers 12, 13, the intermediate bunkers 12, 13 can be charged with inert gas. For this purpose, an inert gas line 22 is provided, which is connected to the intermediate bunkers 12, 13 via lockable branch lines 23. The inert gas is at a higher pressure than prevails in the combustion chamber 11. Treated flue gas from the combustion chamber 11 can be used as the inert gas.

Das beschriebene Schleusensystem arbeitet auf folgende Weise. Durch die Anordnung der Schieber 16,17, der Ausgleichsleitung 19 und der Entlüftungsleitung 18 steht der zweite Zwischenbunker 13 ständig unter den erhöhten Druck, während der erste Zwischenbunker 12 wahlweise unter den erhöhten Druck und unter Atmosphärendruck zu setzen ist. Der erste Zwischenbunker 12 kann aus dem Vorratsbunker 1 und dem Kalkbunker 3 über den Schrägförderer 6 gefüllt werden, wenn der Schieber 16 des ersten Zwischenbehälters 12 sowie das Absperrorgan in der Entlüftungsleitung 18 geöffnet sind und der Schieber 17 des zweiten Zwischenbunkers 13 und das Absperrorgan in der Ausgleichsleitung 19 geschlossen sind und der Zwischenförderer 21 außer Betrieb ist. In diesem Zustand wird auch durch das Austragsorgan 20 kontinuierlich aus dem zweiten Zwischenbunker 13 in die Mühle 5 eingespeist. Um den zweiten Zwischenbunker 13 ohne Unterbrechung der Rohkohlezufuhr zur Mühle 5 nachzufüllen, wird der Schrägförderer 6 und die Querförderer 2 und 24 außer Betrieb gesetzt, der Schieber 16 des ersten Zwischenbunkers 12 und das Absperrorgan in der Entlüftungsleitung 18 geschlossen, der Schieber 17 des zweiten Zwischenbunkers 13 und das Absperrorgan in der Ausgleichsleitung 19 geöffnet sowie der Zwischenförderer 21 in Betrieb gesetzt.The lock system described works in the following way. Due to the arrangement of the slides 16, 17, the equalization line 19 and the vent line 18, the second intermediate bunker 13 is constantly under the increased pressure, while the first intermediate bunker 12 can optionally be placed under the increased pressure and under atmospheric pressure. The first intermediate bunker 12 can be filled from the storage bunker 1 and the lime bunker 3 via the inclined conveyor 6 when the slide 16 of the first intermediate container 12 and the shut-off device in the ventilation line 18 are open and the slide 17 of the second intermediate bunker 13 and the shut-off device in Compensation line 19 are closed and the intermediate conveyor 21 is out of operation. In this state, the discharge member 20 also continuously feeds from the second intermediate bunker 13 into the mill 5. In order to refill the second intermediate bunker 13 without interrupting the raw coal supply to the mill 5, the inclined conveyor 6 and the cross conveyors 2 and 24 are put out of operation, the slide 16 of the first intermediate bunker 12 and the shut-off device in the vent line 18 are closed, the slide 17 of the second intermediate bunker 13 and the shut-off device in the compensating line 19 opened and the intermediate conveyor 21 started up.

Claims (4)

1. Device for feeding coal into a combustion chamber (11) under elevated pressure in which a mill (5) is provided with one feed line for raw coal and one for carrier gas each and in the feed line for raw coal two intermediate bunkers (12, 13) are arranged in series directly before the inlet of mill (5) in whose inlets (14) one pressure-tight closing shut-off device each is arranged, characterized in that mill (5) is directly connected with the combustion chamber (11) via one or several pulverized fuel lines, that the first intermediate bunker (12) seen in the direction of raw coal flow is provided with a vent line (18) capable of being shut off and that the shut-off devices are designed as pressure-tight closing gate valves (16, 17) before which - seen in the direction of coal flow - one intermediate conveyor each (21, 6) is arranged.
2. Device according to Claim 1, characterized in that a compensating line (19) capable of being shut off is arranged between the two intermediate bunkers (12, 13).
3. Device according to Claim 1 or 2, characterized in that the intermediate bunkers (12, 13) are connected by an inert gas line (22) through which an inert gas can be passed at a pressure above that prevailing in the combustion chamber (11 ).
4. Device according to one or several of Claims 1 to 3, characterized in that the volumetric capacity of the first intermediate bunker (12) is larger than that of the following second intermediate bunker (13).
EP82110460A 1982-02-15 1982-11-12 Device for introducing coal in an heating chamber under high pressure Expired EP0086260B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82110460T ATE25551T1 (en) 1982-02-15 1982-11-12 DEVICE FOR INTRODUCING COAL INTO A COMBUSTION ROOM UNDER INCREASED PRESSURE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19823205321 DE3205321A1 (en) 1982-02-15 1982-02-15 DEVICE FOR INPUTING COAL IN A COMBUSTION ROOM UNDER PRESSURIZED PRESSURE
DE3205321 1982-02-15

Publications (3)

Publication Number Publication Date
EP0086260A2 EP0086260A2 (en) 1983-08-24
EP0086260A3 EP0086260A3 (en) 1984-05-30
EP0086260B1 true EP0086260B1 (en) 1987-02-25

Family

ID=6155746

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82110460A Expired EP0086260B1 (en) 1982-02-15 1982-11-12 Device for introducing coal in an heating chamber under high pressure

Country Status (7)

Country Link
EP (1) EP0086260B1 (en)
JP (1) JPS58145816A (en)
AT (1) ATE25551T1 (en)
AU (1) AU554229B2 (en)
CA (1) CA1223774A (en)
DE (2) DE3205321A1 (en)
ZA (1) ZA828682B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103162306A (en) * 2011-12-14 2013-06-19 佛山市国保节能环保技术有限公司 Coal powder long-range conveying and combustion system

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3347703A1 (en) * 1983-12-31 1985-07-11 Loesche GmbH, 4000 Düsseldorf DEVICE AND METHOD USING AN AIRFLOW MILL FOR PRODUCING A HOMOGENEOUS MIXTURE FROM CARBON DUST AND LIME DUST OR DOLOMITE DUST
JPH0351632Y2 (en) * 1985-04-05 1991-11-06
DE4302637A1 (en) * 1993-01-30 1994-08-04 Babcock Energie Umwelt Crude coal feeder to pressurised pulveriser
DE19843255A1 (en) 1998-09-10 2000-03-16 Ver Energiewerke Ag Lignite power station pipe chain conveyer has collar seals fitted at intervals maintaining high pressure difference between furnace and ambient air
CN109985717A (en) * 2017-12-31 2019-07-09 北京蓝亚能源科技有限公司 A kind of safety system of high-efficiency pulverized coal preparation process
RU197671U1 (en) * 2020-02-26 2020-05-21 Виктор Алексеевич Степаненко Pulverized fuel plant

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Publication number Priority date Publication date Assignee Title
US3204942A (en) * 1963-02-18 1965-09-07 Babcock & Wilcox Co Distributor for pneumatically transported particle-form material
NL295333A (en) * 1962-08-11
DE1188098B (en) * 1962-10-24 1965-03-04 Siderurgie Fse Inst Rech Process for regulating the quantities when blowing powdery substances into the tuyeres of blast furnaces
US3306238A (en) * 1965-05-20 1967-02-28 Armco Steel Corp Fuel injection system for blast furnaces

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103162306A (en) * 2011-12-14 2013-06-19 佛山市国保节能环保技术有限公司 Coal powder long-range conveying and combustion system
CN103162306B (en) * 2011-12-14 2015-05-27 佛山市国保节能环保技术有限公司 Coal powder long-range conveying and combustion system

Also Published As

Publication number Publication date
ZA828682B (en) 1983-09-28
JPS58145816A (en) 1983-08-31
DE3205321A1 (en) 1983-08-18
DE3275481D1 (en) 1987-04-02
AU9140982A (en) 1983-08-25
ATE25551T1 (en) 1987-03-15
CA1223774A (en) 1987-07-07
EP0086260A3 (en) 1984-05-30
JPH0225089B2 (en) 1990-05-31
EP0086260A2 (en) 1983-08-24
AU554229B2 (en) 1986-08-14

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