EP1931914B1 - Burning device for pulverized fuel - Google Patents

Burning device for pulverized fuel Download PDF

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Publication number
EP1931914B1
EP1931914B1 EP06805945A EP06805945A EP1931914B1 EP 1931914 B1 EP1931914 B1 EP 1931914B1 EP 06805945 A EP06805945 A EP 06805945A EP 06805945 A EP06805945 A EP 06805945A EP 1931914 B1 EP1931914 B1 EP 1931914B1
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EP
European Patent Office
Prior art keywords
dust
housing
firing device
guide plates
connection piece
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.)
Not-in-force
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EP06805945A
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German (de)
French (fr)
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EP1931914A1 (en
Inventor
Günther Balgar
Michael Moritz
Peter Walter
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Siempelkamp Maschinen und Anlagenbau GmbH and Co KG
Ucon AG Containersysteme KG
Original Assignee
Siempelkamp Maschinen und Anlagenbau GmbH and Co KG
Ucon AG Containersysteme KG
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Application filed by Siempelkamp Maschinen und Anlagenbau GmbH and Co KG, Ucon AG Containersysteme KG filed Critical Siempelkamp Maschinen und Anlagenbau GmbH and Co KG
Publication of EP1931914A1 publication Critical patent/EP1931914A1/en
Application granted granted Critical
Publication of EP1931914B1 publication Critical patent/EP1931914B1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D1/00—Burners for combustion of pulverulent fuel

Definitions

  • the invention relates to a dust-firing device according to the preamble of claim 1.
  • Dust-firing devices of the type mentioned are already out of the DE 1 526 194 A .
  • DE 31 31 962 A or DE 29 33 060 B known.
  • Staubakiungsvoriquesen it is such that the supplied dust flow is deflected between the dust connection pipe and the housing in the longitudinal direction of the housing. Due to the deflection of the dust flow and the closed housing shape, the dust flow gets a twist.
  • the swirl of the dust flow not only causes the housing is particularly heavily stressed at certain points, in particular, the swirl also causes segregation of the dust flow, which is undesirable.
  • Object of the present invention is therefore to avoid the aforementioned disadvantages.
  • a dust-firing device with the features of claim 1 is provided.
  • at least one guide plate aligned in the longitudinal direction of the housing is provided in the dust collection space following the mouth opening of the dust connection neck. It will be understood that the dust-straightening function is improved when not only a baffle but a plurality of baffles are provided.
  • the outer baffles should be spaced at least substantially so far that the maximum distance corresponds at least substantially to the diameter of the mouth opening on the dust connection piece.
  • the outer baffles at least substantially detect the incoming dust stream and then pass it on in the axial direction of the housing.
  • the length of the baffles should preferably be larger than the diameter of the mouth of the dust port to further promote the rectification effect.
  • the baffles should be completely over the area of the mouth opening extend so that the above-described detection function can be ensured in the region of the mouth opening.
  • the baffles extend over only a portion of the length of the dust collecting space.
  • the baffles can release, for example, at both end edges areas that allow flow of the dust volume flow in the annular channel of the dust collection chamber. At the same time any impoundment of the incoming dust flow is avoided.
  • the dust collecting space at least in the region of the mouth opening of the connecting piece on a replaceable, seated on the central channel wear protection.
  • the wear protection can be annular or even ring segment or plate-shaped.
  • the baffles are mounted on the wear protection.
  • the baffles are adjustable by axes parallel to the housing longitudinal axis.
  • dust fuels of the wood industry grinding, screen and process dusts
  • lignite dusts can be used as usable fuels with respect to the dusts
  • a gas and / or oil burner as the burner device, via the natural gas, LPG or biogas or . Heating oils are used.
  • the burner device has a control range for gas of greater than 1:30, preferably of about 1:40.
  • the control range is greater than 1: 4, preferably about 1: 7.
  • the control range of the dust-firing device for dust is greater than 1: 3, preferably, the control range is approximately at 1: 5.
  • the burner device comprises a burner head arranged in the front region of the central channel with an ignition device, wherein a fuel supply line for gas or oil connected to the burner head is provided in the central channel. Due to the arrangement of the burner head in the front region and the ignition of the ignitable mixture in the region of the burner head, the flame is already formed at the front housing opening and widens immediately after its exit.
  • the central channel is led out end side of the housing or protrudes and that a burner air connection piece is provided on the lead-out channel section. While doing this, the fuel supply can take place via an end face plate, it offers for constructive reasons to make the combustion air supply via the burner air connection piece radially. In this way, the fuel supply on the one hand and on the other hand, the burner air supply can be provided on the other end easily.
  • the air ring channel forms the outer annular channel of the housing, while the dust ring channel forms the innermost ring channel of the housing.
  • the innermost annular channel thus adjoins directly to the central channel, so that at least in the end region of the annular channel, a preheating of the supplied dust results over the resulting flame in the region of the burner head.
  • the air ring channel and the dust ring channel are the only ring channels of the housing.
  • the dust firing device according to the invention thus has only the central channel, the Heilringkanal and the dust ring channel.
  • the excellent combustion result results in a structurally very simple construction, which reduces the cost of a dust-burning device according to the invention accordingly.
  • At least one guide plate aligned in the longitudinal direction of the housing is provided in the dust collection space following the mouth opening of the dust connection neck. It will be understood that the dust-straightening function is improved when not only a baffle but a plurality of baffles are provided.
  • At least one inspection opening is provided in the region of the connection piece, by means of which the condition of the wear protection can be monitored manually.
  • an oblique Reduzierstelle is provided between the dust collection chamber and the Staubringammkanal at least substantially free of stall on the Dust ring channel deflects while contributing to an acceleration or increasing the flow velocity of the dust flow.
  • the main air supply to a main air connection piece which opens into an annular expansion space with respect to the air ring channel enlarged annular cross-section.
  • an oblique reducing point is provided between the expansion space and the air ring channel, which leads to an acceleration of the air volume flow.
  • blades are provided at the end in the air ring channel, via which preferably different helix angles can be set.
  • the output side an exclusively funnel-shaped muffle is provided, the hopper angle should be between 10 ° and 80 °.
  • the muffle has no cylindrical portion. This design supports the compact short flame shape.
  • the present invention also relates to a furnace with a dust-firing device of the aforementioned type.
  • a dust-firing device 1 is shown with a dust feed 2 with a Hauptlunzu arrangement 3.
  • the dust feed 2 has inter alia a dust ring channel 4. Further components of the dust feed 2 will be discussed in more detail below.
  • the main air supply 3 has, inter alia, an air-ring channel 5, wherein here also further components of the main air supply 2 will be discussed later.
  • Both the dust-collecting channel 4 and the air-ring channel 5 are parts of the housing 6 of the dust-burning device 1.
  • a central channel 7 is provided, in which a burner device 8 is arranged with an ignition device 9.
  • a burner air supply 10 for combustion air which is supplied to the burner device 8, is connected to the central channel 7.
  • a gas burner In the present case serves as a burner device 8, a gas burner. It is understood, however, that the use of an oil burner is readily possible.
  • the burner device 8 has in the front region 11, that is to say in the region of the outlet opening 12 of the central channel 7, a burner head 13 which is fixed or fastened within the central channel 7.
  • the ignition device 9 is also provided, so that the ignition of the gas-air mixture in the region of the burner head 13 and thus takes place within the housing 6 and the central channel 7.
  • the central channel 7 itself is led out of the end of the housing 6 or stands over.
  • an end-side pipe connection 14 is provided with a burner air connection pipe 15. At the connecting piece 15, a combustion air supply can be connected.
  • the front side of the protruding pipe section 14 is closed, wherein the fuel supply line 17 is passed through an attached outer end plate 16 to the burner head 13.
  • the central channel 7 is surrounded by the dust ring channel 4 as an inner ring channel, while the dust ring channel 4 is surrounded by the Heilringkanal 5.
  • the air ring channel 5 and the dust ring channel 4 are no further at the outlet opening exiting ring channels provided in or on the housing 6. This also results in particular Fig. 4 ,
  • FIG. 2 illustrates that the dust supply 2 has a centrally opening into the housing 6 dust connection piece 18.
  • the Fig. 1 shows that the dust connection piece 18 opens into a present annular dust collecting space 19.
  • the dust collecting chamber 19 has an enlarged annular cross-section with respect to the dust-collecting channel 4.
  • FIG. 1 and 3 show that in the dust collecting space 19 in the flow direction following the mouth opening 20 of the dust connection piece 18 a plurality, in the present case three baffles 21 are provided, which are aligned in the direction of the longitudinal axis L of the housing 6.
  • the central baffle 21 serves to divide the incoming dust-air flow, while the two outer baffles 21 are provided for limiting in the circumferential direction, so that when entering the dust flow into the housing 6 and the dust collection chamber 19 is not directly a flow around the Housing 6 central channel 7 results. So that the dust flow from the outer baffles 21 up or is ultimately captured, the distance between the two outer baffles 21 at their upper ends at least substantially equal to the diameter of the mouth opening 20th
  • Fig. 1 shows that the length of the guide plates 21 is greater than the diameter of the mouth opening 20, wherein the guide plates 21 in the direction of the longitudinal axis L extend completely over the area which is covered by the mouth opening 20. Moreover, a free space is provided on both outer marginal edges 22, 23 of the baffles 21, so that there is no undesirable stagnation when the incoming dust stream enters the dust collecting space 19. Ultimately, the baffles 21 extend so that only over a portion of the length of the dust collection space 19th
  • the baffles 21 may be adjustable either about parallel to the housing longitudinal axis L extending axes or attached to a wear protection 24.
  • the wear protection 24 is presently designed as pushed onto the outside of the central channel 7 pipe section, which is flanged frontally. With appropriate Wear the connection is released and the wear protection 24 withdrawn from the central channel and replaced by a new wear protection 24. Not shown in this context, that one or more control openings for monitoring the state of the wear protection 24 are provided in the region of the dust connection piece 18.
  • an oblique Reduzierstelle 25 is provided between the dust collection chamber 19 and the dust ring channel 4.
  • the main air supply 3 has a central main air connection piece 26, which opens into an annular expansion space 27 with respect to the air ring channel 5 enlarged annular cross-section. Between the relaxation space 27 and the Heilringkanal 5 an oblique Reduzierstelle 28 is provided. Incidentally, guide vanes 29 are provided at the ends in the air ring channel, wherein the blade angle can be fixed or else adjustable.
  • the length of the central channel 7 including the tail pipe section 14 is greater than the length of the housing part, which forms the dust supply 2 with dust collecting space 19 and dust ring channel 4.
  • the shortest is the main air supply 3 forming housing part with the expansion space 27 and the air ring channel. 5
  • the dust-firing device 1 in the present case has a muffle 30, which ultimately belongs to a combustion chamber.
  • the combustion chamber is not shown in detail.
  • the muffle 30 is funnel-shaped in the region of the muffle opening 31 and has no cylindrical portion.
  • the funnel angle is in the illustrated embodiment at about 45 °.
  • To connect the housing 6 with the muffle 30 this is used with its front housing portion 11 in a corresponding cylindrical opening, in such a way that immediately adjoins the end of this housing portion 11 of the funnel-shaped portion of the muffle 30.
  • the attachment of the housing 6 on the outside of the muffle 30 and the combustion chamber via a protruding flange 32 which is screwed, which is not shown in detail.
  • the burner head 13 is already in the region of the wall of the muffle 30th
  • the dust burner device 1 To operate the dust burner device 1 is to be noted that a cold start without support fire from the grid and a driving without grate firing is possible. Due to the structural design of the dust-firing device 1, no dust plugging occurs due to segregation of the dust and thus no burn-back in the annular nozzle or the dust-collecting channel 4 as the dust emerges from the dust-collecting channel 4. The dust is essentially homogeneously mixed from the dust-firing device 1 is also mixed due to the action of the vanes 29 with the main air and ignites immediately following the outlet opening 12. In conjunction with the funnel-shaped muffle opening 31 results in an extremely good combustion with high efficiency in a short flame shape. An incomplete combustion and / or caking in the furnace or in the housing of the dust-burning device 1 and a one-sided overheating of the combustion chamber does not occur.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Measuring Volume Flow (AREA)
  • Medicines Containing Material From Animals Or Micro-Organisms (AREA)
  • Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)

Abstract

The invention relates to a dust burning device (1) comprising a dust inlet (2) and a primary air inlet (3). The dust inlet (2) is provided with an annular dust duct (4) while the primary air inlet (3) is equipped with an annular air duct (5). In order to create a dust burning device (1) which is designed in a simple and inexpensive manner while being very efficient, a central duct (7) is disposed in the housing (6) of the dust burning device (1), a burner apparatus (8) encompassing an ignition mechanism (9) is placed in the central duct, and a combustion air inlet (10) is connected to the central duct (7).

Description

Die Erfindung betrifft eine Staubfeuerungsvorrichtung nach dem Oberbegriff des Anspruchs 1.The invention relates to a dust-firing device according to the preamble of claim 1.

Staubfeuerungsvorrichtungen der eingangs genannten Art sind bereits aus den DE 1 526 194 A , EP 0 315 802 A , DE 35 35 873 A , DE 31 31 962 A oder DE 29 33 060 B bekannt. Bei den bekannten Staubfeuerungsvorrichtungen ist es so, daß der zugeführt Staubstrom zwischen dem Staubanschlußstutzen und dem Gehäuse in Längsrichtung des Gehäuses umgelenkt wird. Aufgrund der Umlenkung des Staubstromes und der geschlossenen Gehäuseform erhält der Staubstrom einen Drall. Der Drall des Staubstromes führt nicht nur dazu, daß das Gehäuse an bestimmten Stellen besonders stark beansprucht wird, insbesondere verursacht der Drall auch eine Entmischung des Staubstromes, was unerwünscht ist.Dust-firing devices of the type mentioned are already out of the DE 1 526 194 A . EP 0 315 802 A . DE 35 35 873 A . DE 31 31 962 A or DE 29 33 060 B known. In the known Staubfeuerungsvorrichtungen it is such that the supplied dust flow is deflected between the dust connection pipe and the housing in the longitudinal direction of the housing. Due to the deflection of the dust flow and the closed housing shape, the dust flow gets a twist. The swirl of the dust flow not only causes the housing is particularly heavily stressed at certain points, in particular, the swirl also causes segregation of the dust flow, which is undesirable.

Aufgabe der vorliegenden Erfindung ist es daher, die vorgenannten Nachteile zu vermeiden.Object of the present invention is therefore to avoid the aforementioned disadvantages.

Erfindungsgemäß ist nur eine Staubfeuerungsvorrichtung mit den Merkmalen des Anspruchs 1 vorgesehen. Zur Verringerung der Dralltendenz des in das Gehäuse eintretenden Staubstromes ist im Staubsammelraum im Anschluß an die Mündungsöffnung des Staubanschlußstutzens wenigstens ein in Längsrichtung des Gehäuses ausgerichtetes Leitblech vorgesehen. Es versteht sich, daß die Staubgleichrichtungsfunktion verbessert wird, wenn nicht nur ein Leitblech, sondern eine Mehrzahl von Leitblechen vorgesehen sind.According to the invention, only a dust-firing device with the features of claim 1 is provided. In order to reduce the swirl tendency of the dust stream entering the housing, at least one guide plate aligned in the longitudinal direction of the housing is provided in the dust collection space following the mouth opening of the dust connection neck. It will be understood that the dust-straightening function is improved when not only a baffle but a plurality of baffles are provided.

Bevorzugt sollten die äußeren Leitbleche zumindest im wesentlichen so weit beabstandet sein, daß der maximale Abstand zumindest im wesentlichen dem Durchmesser der Mündungsöffnung am Staubanschlußstutzen entspricht. Hierdurch erfassen die äußeren Leitblechen den ankommenden Staubstrom zumindest im wesentlichen und leiten diesen dann in Achsrichtung des Gehäuses weiter.Preferably, the outer baffles should be spaced at least substantially so far that the maximum distance corresponds at least substantially to the diameter of the mouth opening on the dust connection piece. As a result, the outer baffles at least substantially detect the incoming dust stream and then pass it on in the axial direction of the housing.

Im übrigen ist festgestellt worden, daß die Länge der Leitbleche vorzugsweise größer als der Durchmesser der Mündungsöffnung des Staubanschlußstutzens sein sollte, um die Gleichrichtungswirkung noch weiter zu unterstützen. Dabei sollten die Leitbleche sich vollständig über den Bereich der Mündungsöffnung erstrecken, so daß sich die zuvor beschriebene Erfassungsfünktion im Bereich der Mündungsöffnung gewährleisten läßt.Incidentally, it has been found that the length of the baffles should preferably be larger than the diameter of the mouth of the dust port to further promote the rectification effect. The baffles should be completely over the area of the mouth opening extend so that the above-described detection function can be ensured in the region of the mouth opening.

Um die Homogenisierungsfunktion des Staubsammelraums durch die Leitbleche nicht erheblich zu beeinträchtigen, bietet es sich weiter an, daß sich die Leitbleche nur über einen Teilbereich der Länge des Staubsammelraums erstrecken. So können die Leitbleche beispielsweise an beiden Endkanten Bereiche freigeben, die ein Strömen des Staubvolumenstroms im Ringkanal des Staubsammelraums ermöglichen. Gleichzeitig wird eine etwaige Aufstauung des ankommenden Staubstromes vermieden.In order not to significantly affect the homogenization function of the dust collecting space by the baffles, it is further appropriate that the baffles extend over only a portion of the length of the dust collecting space. Thus, the baffles can release, for example, at both end edges areas that allow flow of the dust volume flow in the annular channel of the dust collection chamber. At the same time any impoundment of the incoming dust flow is avoided.

Da der zugeführte Staub im Staubsammelraum letztlich umgelenkt wird, ist die Auftrefffläche im Bereich des Gehäuses einem relativ hohen Verschleiß ausgesetzt. Um dem Rechnung zu tragen, weist der Staubsammelraum zumindest im Bereich der Mündungsöffnung des Anschlußstutzens einen austauschbaren, auf dem zentralen Kanal aufsitzenden Verschleißschutz auf. Der Verschleißschutz kann dabei ringförmig oder auch nur ringsegment- oder plattenförmig ausgebildet sein.Since the supplied dust is ultimately deflected in the dust collecting space, the impact surface in the region of the housing is exposed to relatively high wear. To take this into account, the dust collecting space, at least in the region of the mouth opening of the connecting piece on a replaceable, seated on the central channel wear protection. The wear protection can be annular or even ring segment or plate-shaped.

Grundsätzlich ist es in diesem Zusammenhang möglich, daß die Leitbleche auf dem Verschleißschutz befestigt sind. Allerdings kann es zur Erzielung bestimmter Strömungsverläufe des Staubes auch günstig sein, daß die Leitbleche um parallel zur Gehäuselängsachse verlaufende Achsen verstellbar sind.Basically, it is possible in this context that the baffles are mounted on the wear protection. However, it may also be beneficial to achieve certain flow patterns of the dust, that the baffles are adjustable by axes parallel to the housing longitudinal axis.

Während als einsetzbare Brennstoffe bezüglich der Stäube insbesondere staubförmige Brennstoffe der Holzindustrie (Schleif-, Sieb- und Prozeßstäube) sowie Braunkohlenstäube einsetzbar sind, bietet es sich an, als Brennereinrichtung einen Gas- und/oder Ölbrenner einzusetzen, über den Erdgas, LPG oder Biogas bzw. Heizöle einsetzbar sind.While dust fuels of the wood industry (grinding, screen and process dusts) and lignite dusts can be used as usable fuels with respect to the dusts, it is appropriate to use a gas and / or oil burner as the burner device, via the natural gas, LPG or biogas or . Heating oils are used.

Aufgrund der erfindungsgemäßen Ausgestaltung der Staubfeuerungsvorrichtung ist es im übrigen möglich, daß die Brennereinrichtung einen Regelbereich bei Gas von größer 1:30, vorzugsweise von etwa 1:40 hat. Bei Öl ist der Regelbereich größer 1:4, vorzugsweise etwa 1:7. Darüber hinaus ist der Regelbereich der Staubfeuerungsvorrichtung beim Staub größer 1:3, vorzugsweise liegt der Regelbereich etwa bei 1:5.Due to the inventive design of the dust-firing device, it is otherwise possible that the burner device has a control range for gas of greater than 1:30, preferably of about 1:40. For oil, the control range is greater than 1: 4, preferably about 1: 7. In addition, the control range of the dust-firing device for dust is greater than 1: 3, preferably, the control range is approximately at 1: 5.

Um eine kompakte und kurze Flammenform zu erzielen, ist im übrigen erfindungsgemäß vorgesehen, daß die Brennereinrichtung einen im vorderen Bereich des zentralen Kanals angeordneten Brennerkopf mit einer Zündeinrichtung aufweist, wobei eine mit dem Brennerkopf verbundene Brennstoffzuführleitung für Gas oder Öl im zentralen Kanal vorgesehen ist. Durch die Anordnung des Brennerkopfes im vorderen Bereich und die Zündung des zündfähigen Gemisches im Bereich des Brennerkopfes entsteht die Flamme bereits an der vorderen Gehäuseöffnung und erweitert sich unmittelbar nach ihrem Austritt.In order to achieve a compact and short flame shape, it is provided according to the invention that the burner device comprises a burner head arranged in the front region of the central channel with an ignition device, wherein a fuel supply line for gas or oil connected to the burner head is provided in the central channel. Due to the arrangement of the burner head in the front region and the ignition of the ignitable mixture in the region of the burner head, the flame is already formed at the front housing opening and widens immediately after its exit.

In konstruktiver Hinsicht ist es im Zusammenhang mit der Brennereinrichtung günstig, daß der zentrale Kanal endseitig aus dem Gehäuse herausgeführt ist bzw. übersteht und daß am herausgeführten Kanalabschnitt ein Brennerluftanschlußstutzen vorgesehen ist. Während dabei die Brennstoffzuführung über eine endseitige Stirnplatte erfolgen kann, bietet es sich aus konstruktiven Gründen an, die Verbrennungsluftzuführung über den Brennerluftanschlußstutzen radial vorzunehmen. Auf diese Weise kann endseitig ohne weiteres einerseits die Brennstoffzuführung und andererseits die Brennerluftzuführung vorgesehen werden.In terms of design, it is favorable in connection with the burner device, that the central channel is led out end side of the housing or protrudes and that a burner air connection piece is provided on the lead-out channel section. While doing this, the fuel supply can take place via an end face plate, it offers for constructive reasons to make the combustion air supply via the burner air connection piece radially. In this way, the fuel supply on the one hand and on the other hand, the burner air supply can be provided on the other end easily.

Zur Erzielung einer vorteilhaften Verbrennung bietet es sich an, daß der Luftringkanal den äußeren Ringkanal des Gehäuses bildet, während der Staubringkanal den innersten Ringkanal des Gehäuses bildet. Der innerste Ringkanal grenzt damit unmittelbar an den zentralen Kanal an, so daß sich zumindest im Endbereich des Ringkanals eine Vorwärmung des zugeführten Staubes über die im Bereich des Brennerkopfes entstehende Flamme ergibt.To achieve an advantageous combustion, it makes sense that the air ring channel forms the outer annular channel of the housing, while the dust ring channel forms the innermost ring channel of the housing. The innermost annular channel thus adjoins directly to the central channel, so that at least in the end region of the annular channel, a preheating of the supplied dust results over the resulting flame in the region of the burner head.

Im Zusammenhang mit der vorliegenden Erfindung ist festgestellt worden, daß es im Gegensatz zum Stand der Technik möglich ist, ein hervorragendes Verbrennungsergebnis bei hohem Wirkungsgrad bereits dadurch zu erreichen, daß der Luftringkanal und der Staubringkanal die einzigen Ringkanäle des Gehäuses sind. Die erfindungsgemäße Staubfeuerungsvorrichtung weist damit lediglich den zentralen Kanal, den Luftringkanal und den Staubringkanal auf. Neben dem hervorragenden Verbrennungsergebnis ergibt sich ein konstruktiv sehr einfacher Aufbau, was die Kosten für eine erfindungsgemäße Staubfeuerungsvorrichtung entsprechend verringert.In the context of the present invention, it has been found that, in contrast to the prior art, it is possible to achieve an excellent combustion result with high efficiency already in that the air ring channel and the dust ring channel are the only ring channels of the housing. The dust firing device according to the invention thus has only the central channel, the Luftringkanal and the dust ring channel. In addition to the excellent combustion result results in a structurally very simple construction, which reduces the cost of a dust-burning device according to the invention accordingly.

Von besonderem Vorteil im Zusammenhang mit der Staubzuführung ist es, daß diese einen mittig in das Gehäuse mündenden Staubanschlußstutzen aufweist.Of particular advantage in connection with the dust supply is that it has a centrally opening into the housing dust connection piece.

Die mittige Anordnung des Staubanschlußstutzens am Gehäuse führt für sich bereits dazu, daß, im Gegensatz zum Stand der Technik, dem dem Gehäuse der Staubfeuerungsvorrichtung zugeführten Staubstrom kein Drall aufgegeben wird, der zu einer Entmischung des Staubstromes führt, wie dies beim Stand der Technik der Fall ist. Hieraus resultiert ein erheblich verbessertes Verbrennungsergebnis durch eine gleichmäßige Verbrennung und die Vermeidung von Ablagerungen und Anbackungen.The central arrangement of the dust connection piece on the housing already leads to the fact that, in contrast to the prior art, the dust supplied to the housing of the dust combustion device no swirl is given, which leads to a segregation of the dust flow, as is the case in the prior art is. This results in a significantly improved combustion result by a uniform combustion and the prevention of deposits and caking.

Des weiteren ist im Zusammenhang mit der vorliegenden Erfindung festgestellt worden, daß es sich als zweckmäßig erwiesen hat, zwischen den Staubringkanal und den Anschlußstutzen der Staubzuführung einen vorzugsweise ringförmig ausgebildeten Staubsammelraum mit gegenüber dem Staubringkanal vergrößertem Ringquerschnitt vorzusehen. In diesem Staubsammelraum findet eine Homogenisierung des in das Gehäuse eintretenden Staubes statt. Der Staubsammelraum wirkt damit einer Entmischung des Staubstromes beim Eintritt in das Gehäuse entgegen.Furthermore, it has been found in connection with the present invention that it has proved to be useful to provide a preferably annular dust collecting space with respect to the dust ring channel enlarged annular cross section between the dust ring channel and the connecting piece of the dust supply. In this dust collection chamber, a homogenization of the dust entering the housing takes place. The dust collection chamber thus counteracts segregation of the dust flow when entering the housing.

Um die Dralltendenz des in das Gehäuse eintretenden Staubstromes weiter zu verringern, ist im Staubsammelraum im Anschluß an die Mündungsöffnung des Staubanschlußstutzens wenigstens ein in Längsrichtung des Gehäuse ausgerichtetes Leitblech vorgesehen. Es versteht sich, daß die Staubgleichrichtungsfunktion verbessert wird, wenn nicht nur ein Leitblech, sondern eine Mehrzahl von Leitblechen vorgesehen sind.In order to further reduce the swirling tendency of the dust stream entering the housing, at least one guide plate aligned in the longitudinal direction of the housing is provided in the dust collection space following the mouth opening of the dust connection neck. It will be understood that the dust-straightening function is improved when not only a baffle but a plurality of baffles are provided.

Um den Verschleißzustand des Verschleißschutzes in einfacher Weise überwachen zu können, ist im Bereich des Anschlußstutzens wenigstens eine Kontrollöffnung vorgesehen, über die manuell der Zustand des Verschleißschutzes überwacht werden kann.In order to be able to monitor the state of wear of the wear protection in a simple manner, at least one inspection opening is provided in the region of the connection piece, by means of which the condition of the wear protection can be monitored manually.

Um innerhalb der Staubzuführung keine Strömungsabrisse und damit keine unerwünschten Ablagerungen von Staubpartikeln zu erhalten, was letztlich zu einer Verstopfung der Staubzuführung führen könnte, ist zwischen dem Staubsammelraum und dem Staubringkanal eine schräge Reduzierstelle vorgesehen, die den vom Staubsammelraum ankommenden Staubstrom zumindest im wesentlichen strömungsabrißfrei auf den Staubringkanal umlenkt und dabei gleichzeitig zu einer Beschleunigung bzw. der Erhöhung der Strömungsgeschwindigkeit des Staubstromes beiträgt.In order to obtain within the dust supply no stalls and thus no unwanted deposits of dust particles, which could ultimately lead to clogging of the dust supply, an oblique Reduzierstelle is provided between the dust collection chamber and the Staubringammkanal at least substantially free of stall on the Dust ring channel deflects while contributing to an acceleration or increasing the flow velocity of the dust flow.

Bei einer konstruktiv einfachen Ausgestaltung der Erfindung weist die Hauptluftzuführung einen Hauptluftanschlußstutzen auf, der in einen ringförmigen Entspannungsraum mit gegenüber dem Luftringkanal vergrößertem Ringquerschnitt mündet. Dabei ist, wie auch im Zusammenhang mit dem Staubringkanal, zwischen dem Entspannungsraum und dem Luftringkanal eine schräge Reduzierstelle vorgesehen, die zu einer Beschleunigung des Luftvolumenstromes führt.In a structurally simple embodiment of the invention, the main air supply to a main air connection piece, which opens into an annular expansion space with respect to the air ring channel enlarged annular cross-section. In this case, as in connection with the dust ring channel, an oblique reducing point is provided between the expansion space and the air ring channel, which leads to an acceleration of the air volume flow.

Um eine gute Vermischung des aus dem Staubringkanal austretenden Staubes mit der aus dem Luftringkanal austretenden Luft zu erzielen, sind endseitig im Luftringkanal Schaufeln vorgesehen, über die vorzugsweise unterschiedliche Drallwinkel einstellbar sind.In order to achieve a good mixing of the dust emerging from the dust ring channel with the air emerging from the air ring channel, blades are provided at the end in the air ring channel, via which preferably different helix angles can be set.

Im übrigen ist es im Zusammenhang mit der erfindungsgemäßen Staubfeuerungsvorrichtung von Vorteil, daß ausgangsseitig eine ausschließlich trichterförmige Muffel vorgesehen ist, wobei der Trichterwinkel zwischen 10° und 80° liegen sollte. Unter ausschließlich "trichterförmig" wird vorliegend verstanden, daß die Muffel keinen zylindrischen Abschnitt aufweist. Durch diese Ausbildung wird die kompakte kurze Flammenform unterstützt.Moreover, it is in connection with the dust-firing device according to the invention is advantageous in that the output side, an exclusively funnel-shaped muffle is provided, the hopper angle should be between 10 ° and 80 °. Under exclusively "funnel-shaped" is understood in the present case that the muffle has no cylindrical portion. This design supports the compact short flame shape.

Im übrigen betrifft die vorliegende Erfindung auch einen Ofen mit einer Staubfeuerungsvorrichtung der vorgenannten Art.Moreover, the present invention also relates to a furnace with a dust-firing device of the aforementioned type.

Nachfolgend werden Ausführungsbeispiele der Erfindung anhand der Zeichnung erläutert, wobei darauf hingewiesen wird, daß die dargestellte Ausführungsform lediglich ein bevorzugtes Ausführungsbeispiel zeigt, ohne hierauf beschränkt zu sein.Hereinafter, embodiments of the invention will be explained with reference to the drawing, it being understood that the illustrated embodiment shows only a preferred embodiment, without being limited thereto.

Es zeigt

Fig. 1
eine schematische Seitenansicht einer erfindungsgemäßen Staubfeuerungsvorrichtung,
Fig. 2
eine Draufsicht auf die Staubfeuerungsvorrichtung gemäß Fig. 1,
Fig. 3
eine Schnittansicht der Staubfeuerungsvorrichtung entlang der Schnittlinie III-III aus Fig. 1 ohne Brennereinrichtung und
Fig. 4
eine Vorderansicht der Staubfeuerungsvorrichtung aus Fig. 1.
It shows
Fig. 1
a schematic side view of a dust-burning device according to the invention,
Fig. 2
a plan view of the Staubfeuerungsvorrichtung according to Fig. 1 .
Fig. 3
a sectional view of the dust-firing device along the section line III-III Fig. 1 without burner device and
Fig. 4
a front view of the Staubfeuerungsvorrichtung Fig. 1 ,

In den Figuren ist eine Staubfeuerungsvorrichtung 1 mit einer Staubzuführung 2 mit einer Hauptlunzuführung 3 dargestellt. Die Staubzuführung 2 weist unter anderem einen Staubringkanal 4 auf. Auf weitere Bauteile der Staubzuführung 2 wird nachfolgend noch näher eingegangen. Die Hauptluftzuführung 3 weist unter anderem einen Luftringkanal 5 auf, wobei auch hier auf weitere Bauteile der Hauptluftzuführung 2 später eingegangen wird. Sowohl der Staubringkanal 4 als auch der Luftringkanal 5 sind Teile des Gehäuses 6 der Staubfeuerungsvorrichtung 1.In the figures, a dust-firing device 1 is shown with a dust feed 2 with a Hauptlunzuführung 3. The dust feed 2 has inter alia a dust ring channel 4. Further components of the dust feed 2 will be discussed in more detail below. The main air supply 3 has, inter alia, an air-ring channel 5, wherein here also further components of the main air supply 2 will be discussed later. Both the dust-collecting channel 4 and the air-ring channel 5 are parts of the housing 6 of the dust-burning device 1.

Wesentlich ist nun, daß im Gehäuse 6 ein zentraler Kanal 7 vorgesehen ist, in dem eine Brennereinrichtung 8 mit einer Zündeinrichtung 9 angeordnet ist. Im übrigen ist an den zentralen Kanal 7 eine Brennerluftzuführung 10 für Verbrennungsluft, die der Brennereinrichtung 8 zugeführt wird, angeschlossen.It is essential that in the housing 6, a central channel 7 is provided, in which a burner device 8 is arranged with an ignition device 9. Incidentally, a burner air supply 10 for combustion air, which is supplied to the burner device 8, is connected to the central channel 7.

Im vorliegenden Fall dient als Brennereinrichtung 8 ein Gasbrenner. Es versteht sich jedoch, daß auch der Einsatz eines Ölbrenners ohne weiteres möglich ist.In the present case serves as a burner device 8, a gas burner. It is understood, however, that the use of an oil burner is readily possible.

Die Brennereinrichtung 8 weist im vorderen Bereich 11, das heißt im Bereich der Austrittsöffnung 12 des zentralen Kanals 7 einen Brennerkopf 13 auf, der innerhalb des zentralen Kanal 7 fixiert bzw. befestigt ist. Am Brennerkopf 13 ist ebenfalls die Zündeinrichtung 9 vorgesehen, so daß die Zündung des Gas-LuftGemisches im Bereich des Brennerkopfes 13 und damit innerhalb des Gehäuses 6 bzw. des zentralen Kanals 7 erfolgt. Der zentrale Kanal 7 selbst ist endseitig aus dem Gehäuse 6 herausgeführt bzw. steht über. Im dargestellten Ausführungsbeispiel ist ein endseitiger Rohranschluß 14 mit einem Brennerluftanschlußstutzen 15 vorgesehen. An den Anschlußstutzen 15 kann eine Verbrennungsluftzuführleitung angeschlossen werden. Stirnseitig ist der überstehender Rohrabschnitt 14 verschlossen, wobei durch eine angesetzte äußere Stirnplatte 16 die Brennstoffzuführleitung 17 zum Brennerkopf 13 hindurchgeführt ist.The burner device 8 has in the front region 11, that is to say in the region of the outlet opening 12 of the central channel 7, a burner head 13 which is fixed or fastened within the central channel 7. On the burner head 13, the ignition device 9 is also provided, so that the ignition of the gas-air mixture in the region of the burner head 13 and thus takes place within the housing 6 and the central channel 7. The central channel 7 itself is led out of the end of the housing 6 or stands over. In the illustrated embodiment, an end-side pipe connection 14 is provided with a burner air connection pipe 15. At the connecting piece 15, a combustion air supply can be connected. The front side of the protruding pipe section 14 is closed, wherein the fuel supply line 17 is passed through an attached outer end plate 16 to the burner head 13.

Der zentrale Kanal 7 wird umgeben von dem Staubringkanal 4 als inneren Ringkanal, während der Staubringkanal 4 vom Luftringkanal 5 umgeben ist. Neben dem Luftringkanal 5 und dem Staubringkanal 4 sind keine weiteren an der Austrittsöffnung austretenden Ringkanäle im oder am Gehäuse 6 vorgesehen. Dies ergibt sich insbesondere auch aus Fig. 4.The central channel 7 is surrounded by the dust ring channel 4 as an inner ring channel, while the dust ring channel 4 is surrounded by the Luftringkanal 5. In addition to the air ring channel 5 and the dust ring channel 4 are no further at the outlet opening exiting ring channels provided in or on the housing 6. This also results in particular Fig. 4 ,

Insbesondere die Fig. 2 verdeutlicht, daß die Staubzuführung 2 einen mittig in das Gehäuse 6 mündenden Staubanschlußstutzen 18 aufweist. Die Fig. 1 zeigt dabei, daß der Staubanschlußstutzen 18 in einen vorliegend ringförmigen Staubsammelraum 19 mündet. Der Staubsammelraum 19 hat gegenüber dem Staubringkanal 4 einen vergrößerten Ringquerschnitt.especially the Fig. 2 illustrates that the dust supply 2 has a centrally opening into the housing 6 dust connection piece 18. The Fig. 1 shows that the dust connection piece 18 opens into a present annular dust collecting space 19. The dust collecting chamber 19 has an enlarged annular cross-section with respect to the dust-collecting channel 4.

Insbesondere die Fig. 1 und 3 zeigen, daß im Staubsammelraum 19 in Strömungsrichtung im Anschluß an die Mündungsöffnung 20 des Staubanschlußstutzens 18 mehrere, vorliegend drei Leitbleche 21 vorgesehen sind, die in Richtung der Längsachse L des Gehäuses 6 ausgerichtet sind. Das mittige Leitblech 21 dient dazu, den ankommenden Staub-Luft-Strom aufzuteilen, während die beiden äußeren Leitbleche 21 zur Begrenzung in Umfangsrichtung vorgesehen sind, so daß sich beim Eintritt des Staubstromes in das Gehäuse 6 bzw. den Staubsammelraum 19 nicht unmittelbar ein Umströmen des Gehäuses 6 zentralen Kanals 7 ergibt. Damit der Staubstrom von den äußeren Leitblechen 21 auf- oder letztlich eingefangen wird, entspricht der Abstand der beiden äußeren Leitbleche 21 an ihren oberen Enden zumindest im wesentlichen dem Durchmesser der Mündungsöffnung 20.especially the Fig. 1 and 3 show that in the dust collecting space 19 in the flow direction following the mouth opening 20 of the dust connection piece 18 a plurality, in the present case three baffles 21 are provided, which are aligned in the direction of the longitudinal axis L of the housing 6. The central baffle 21 serves to divide the incoming dust-air flow, while the two outer baffles 21 are provided for limiting in the circumferential direction, so that when entering the dust flow into the housing 6 and the dust collection chamber 19 is not directly a flow around the Housing 6 central channel 7 results. So that the dust flow from the outer baffles 21 up or is ultimately captured, the distance between the two outer baffles 21 at their upper ends at least substantially equal to the diameter of the mouth opening 20th

Fig. 1 zeigt, daß die Länge der Leitbleche 21 um einiges größer ist als der Durchmesser der Mündungsöffnung 20, wobei sich die Leitbleche 21 in Richtung der Längsachse L vollständig über den Bereich erstrecken, der von der Mündungsöffnung 20 abgedeckt wird. Im übrigen ist an beiden äußeren Randkanten 22, 23 der Leitbleche 21 jeweils ein Freiraum vorgesehen, so daß es nicht zu einer unerwünschten Stauung kommt, wenn der ankommende Staubstrom in den Staubsammelraum 19 eintritt. Letztlich erstrecken sich die Leitbleche 21 damit nur über einen Teilbereich der Länge des Staubsammelraums 19. Fig. 1 shows that the length of the guide plates 21 is greater than the diameter of the mouth opening 20, wherein the guide plates 21 in the direction of the longitudinal axis L extend completely over the area which is covered by the mouth opening 20. Moreover, a free space is provided on both outer marginal edges 22, 23 of the baffles 21, so that there is no undesirable stagnation when the incoming dust stream enters the dust collecting space 19. Ultimately, the baffles 21 extend so that only over a portion of the length of the dust collection space 19th

Ein Vergleich der Fig. 1 und 3 ergibt im übrigen, daß die Achsen der Leitbleche 21 parallel zur Gehäuselängsachse L verlaufen. Die Leitbleche 21 können dabei entweder über parallel zur Gehäuselängsachse L verlaufende Achsen verstellbar sein oder aber auf einem Verschleißschutz 24 befestigt sein. Der Verschleißschutz 24 ist vorliegend als auf die Außenseite des zentralen Kanals 7 aufgeschobener Rohrabschnitt ausgebildet, der stirnseitig angeflanscht ist. Bei entsprechendem Verschleiß wird die Verbindung gelöst und der Verschleißschutz 24 vom zentralen Kanal abgezogen und durch einen neuen Verschleißschutz 24 ersetzt. Nicht dargestellt ist in diesem Zusammenhang, daß im Bereich des Staubanschlußstutzens 18 eine oder mehrere Kontrollöffnungen zur Überwachung des Zustands des Verschleißschutzes 24 vorgesehen sind.A comparison of Fig. 1 and 3 moreover, that the axes of the baffles 21 are parallel to the housing longitudinal axis L. The baffles 21 may be adjustable either about parallel to the housing longitudinal axis L extending axes or attached to a wear protection 24. The wear protection 24 is presently designed as pushed onto the outside of the central channel 7 pipe section, which is flanged frontally. With appropriate Wear the connection is released and the wear protection 24 withdrawn from the central channel and replaced by a new wear protection 24. Not shown in this context, that one or more control openings for monitoring the state of the wear protection 24 are provided in the region of the dust connection piece 18.

Wie sich im übrigen aus den Fig. 1 und 2 ergibt, ist zwischen dem Staubsammelraum 19 und dem Staubringkanal 4 eine schräge Reduzierstelle 25 vorgesehen.As in the rest of the Fig. 1 and 2 shows, an oblique Reduzierstelle 25 is provided between the dust collection chamber 19 and the dust ring channel 4.

Die Hauptluftzuführung 3 weist einen mittigen Hauptluftanschlußstutzen 26 auf, der in einen ringförmigen Entspannungsraum 27 mit gegenüber dem Luftringkanal 5 vergrößertem Ringquerschnitt mündet. Zwischen dem Entspannungsraum 27 und dem Luftringkanal 5 ist dabei eine schräge Reduzierstelle 28 vorgesehen. Im übrigen sind endseitig im Luftringkanal Leitschaufeln 29 vorgesehen, wobei der Schaufelwinkel fest oder aber auch einstellbar sein kann.The main air supply 3 has a central main air connection piece 26, which opens into an annular expansion space 27 with respect to the air ring channel 5 enlarged annular cross-section. Between the relaxation space 27 and the Luftringkanal 5 an oblique Reduzierstelle 28 is provided. Incidentally, guide vanes 29 are provided at the ends in the air ring channel, wherein the blade angle can be fixed or else adjustable.

Die Fig. 1 und 2 verdeutlichen im übrigen, daß die Länge des zentralen Kanals 7 einschließlich des Endrohrstücks 14 größer ist als die Länge des Gehäuseteils, der die Staubzuführung 2 mit Staubsammelraum 19 und Staubringkanal 4 bildet. Am kürzesten ist der die Hauptluftzuführung 3 bildende Gehäuseteil mit dem Entspannungsraum 27 und dem Luftringkanal 5.The Fig. 1 and 2 make it clear, moreover, that the length of the central channel 7 including the tail pipe section 14 is greater than the length of the housing part, which forms the dust supply 2 with dust collecting space 19 and dust ring channel 4. The shortest is the main air supply 3 forming housing part with the expansion space 27 and the air ring channel. 5

Weiter zeigt die Fig. 1, daß die Staubfeuerungsvorrichtung 1 vorliegend eine Muffel 30, die letztlich zu einer Brennkammer gehört, aufweist. Die Brennkammer ist im einzelnen nicht dargestellt. Die Muffel 30 ist im Bereich der Muffelöffnung 31 trichterförmig ausgebildet und weist keinen zylinderförmigen Abschnitt auf. Der Trichterwinkel liegt im dargestellten Ausführungsbeispiel bei etwa 45°. Zur Verbindung des Gehäuses 6 mit der Muffel 30 ist dieses mit seinem vorderen Gehäusebereich 11 in eine entsprechende zylinderförmige Öffnung eingesetzt, und zwar derart, daß sich an das Ende dieses Gehäusebereichs 11 unmittelbar der trichterförmige Bereich der Muffel 30 anschließt. Die Befestigung des Gehäuses 6 an der Außenseite der Muffel 30 bzw. der Brennkammer erfolgt über einen abstehenden Flansch 32, der verschraubt ist, was im einzelnen nicht dargestellt ist. Wie sich aus Fig. 1 weiter ergibt, befindet sich der Brennerkopf 13 bereits im Bereich der Wandung der Muffel 30.Next shows the Fig. 1 in that the dust-firing device 1 in the present case has a muffle 30, which ultimately belongs to a combustion chamber. The combustion chamber is not shown in detail. The muffle 30 is funnel-shaped in the region of the muffle opening 31 and has no cylindrical portion. The funnel angle is in the illustrated embodiment at about 45 °. To connect the housing 6 with the muffle 30 this is used with its front housing portion 11 in a corresponding cylindrical opening, in such a way that immediately adjoins the end of this housing portion 11 of the funnel-shaped portion of the muffle 30. The attachment of the housing 6 on the outside of the muffle 30 and the combustion chamber via a protruding flange 32 which is screwed, which is not shown in detail. As it turned out Fig. 1 results further, the burner head 13 is already in the region of the wall of the muffle 30th

Im übrigen versteht es sich, daß bei der erfindungsgemäßen Staubfeuerungsvorrichtung eine übliche Flammenüberwachung mit entsprechenden Sicherheitsarmaturen vorgesehen ist.Moreover, it is understood that in the dust burner according to the invention a conventional flame monitoring is provided with appropriate safety fittings.

Zum Betrieb der Staubfeuerungsvorrichtung 1 ist zu beachten, daß ein Kaltstart ohne Stützfeuer vom Rost und auch eine Fahrweise ohne Rostfeuerung möglich ist. Durch den konstruktiven Aufbau der Staubfeuerungsvorrichtung 1 ergibt sich beim Austritt des Staubes aus dem Staubringkanal 4 keine Verstopfung der Staubdüse durch Entmischung des Staubes und damit auch keine Rückbrände in der Ringdüse bzw. dem Staubringkanal 4. Der Staub tritt im wesentlichen homogen vermischt aus der Staubfeuerungsvorrichtung 1 aus, wird auch aufgrund der Wirkung der Leitschaufeln 29 mit der Hauptluft vermischt und zündet unmittelbar im Anschluß an die Austrittsöffnung 12. In Verbindung mit der trichterförmigen Muffelöffnung 31 ergibt sich eine außerordentlich gute Verbrennung mit hohem Wirkungsgrad bei einer kurzen Flammenform. Eine unvollständige Verbrennung und/oder Anbackungen im Feuerraum oder im Gehäuse der Staubfeuerungsvorrichtung 1 sowie eine einseitige Überhitzung der Brennkammer tritt nicht auf.To operate the dust burner device 1 is to be noted that a cold start without support fire from the grid and a driving without grate firing is possible. Due to the structural design of the dust-firing device 1, no dust plugging occurs due to segregation of the dust and thus no burn-back in the annular nozzle or the dust-collecting channel 4 as the dust emerges from the dust-collecting channel 4. The dust is essentially homogeneously mixed from the dust-firing device 1 is also mixed due to the action of the vanes 29 with the main air and ignites immediately following the outlet opening 12. In conjunction with the funnel-shaped muffle opening 31 results in an extremely good combustion with high efficiency in a short flame shape. An incomplete combustion and / or caking in the furnace or in the housing of the dust-burning device 1 and a one-sided overheating of the combustion chamber does not occur.

Abschließend wird darauf hingewiesen, daß sämtliche vorgenannte oder in den Ansprüchen angegebene Wertebereiche nicht nur die angegebenen Intervallgrenzen, sondern sämtliche Werte innerhalb der Intervallgrenzen umfassen, auch wenn diese im einzelnen nicht angegeben sind.Finally, it is pointed out that all of the abovementioned ranges of values or those specified in the claims encompass not only the specified interval limits, but also all values within the interval limits, even if these are not specified in detail.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
StaubfeuerungsvorrichtungStaubfeuerungsvorrichtung
22
Staubzuführungdust feed
33
HauptluftzuführungMain air supply
44
StaubringkanalDust ring channel
55
LuftringkanalAir ring channel
66
Gehäusecasing
77
zentraler Kanalcentral channel
88th
Brennereinrichtungburner means
99
Zündeinrichtungignition device
1010
BrennerluftzuführungBurner air supply
1111
vorderer Bereichfront area
1212
ÄustrittsöfthungÄustrittsöfthung
1313
Brennerkopfburner head
1414
Rohranschlußpipe connection
1515
Anschlußstutzenconnecting branch
1616
Stirnplattefaceplate
1717
Brennstoffzuführleitungfuel supply
1818
StaubanschlußstutzenDust connecting branch
1919
StaubsammelraumDust collection chamber
2020
Mündungsöffnungmouth
2121
Leitblechbaffle
2222
Randkanteedge
2323
Randkanteedge
2424
Verschleißschutzwear protection
2525
ReduzierstelleReduzierstelle
2626
HauptluftanschlußstutzenMain air connection piece
2727
Entspannungsraumrelaxation room
2828
ReduzierstelleReduzierstelle
2929
Leitschaufelvane
3030
Muffelmuffle
3131
Muffelöffnungmuffle opening
LL
Längsachselongitudinal axis

Claims (9)

  1. Dust firing device (1), with a dust feed (2) and with a main air feed (3), the dust feed (2) having a dust ring duct (4) and the main feed (3) having an air ring duct (5), a central duct (7) being provided in the housing (6) of the dust firing device (1), a burner device (8) with an ignition device (9) being provided in the central duct, a burner air feed (10) being connected to the central duct (7), and the dust feed (2) having a dust connection piece (18) which issues centrally into the housing (6) and which issues into a dust collection space (19) of the housing (6), the said dust collection space having a ring cross section enlarged with respect to the dust ring duct (4), characterized in that a plurality of guide plates (21) oriented in the longitudinal direction (L) of the housing (6) are provided in the dust collection space after an issuing orifice (20) of the dust connection piece (18).
  2. Dust firing device according to Claim 1, characterized in that a central guide plate (21) for apportioning an incoming dust/air stream is provided.
  3. Dust firing device according to Claim 1 or 2, characterized in that the spacing of the outer guide plates (21) with respect to one another corresponds at least essentially to the diameter of the issuing orifice (20) of the dust connection piece (18).
  4. Dust firing device according to one of the preceding claims, characterized in that the length of the guide plates (21) is larger than the diameter of the issuing orifice (20) of the dust connection piece (18),
  5. Dust firing device according to one of the preceding claims, characterized in that the guide plates (21) extend in the direction of the longitudinal axis (L), completely over the region which is covered by the issuing orifice (20).
  6. Dust firing device according to one of the preceding claims, characterized in that the dust collection space (19) has, at least in the region of the issuing orifice (20) of the dust connection piece (18), an exchangeable wear protection (24) seated on the central duct.
  7. Dust firing device according to one of the preceding claims, characterized in that the guide plates (21) are adjustable about axes running parallel to the housing longitudinal axis (L), or in that the guide plates (21) are fastened on the wear protection (24).
  8. Dust firing device according to one of the preceding claims, characterized in that in each case a free space is provided at the outer marginal edges (22, 23) of the guide plates (21).
  9. Furnace having a dust firing device according to one of the preceding claims.
EP06805945A 2005-09-29 2006-09-29 Burning device for pulverized fuel Not-in-force EP1931914B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005046831A DE102005046831A1 (en) 2005-09-29 2005-09-29 Staubfeuerungsvorrichtung
PCT/EP2006/009462 WO2007036368A1 (en) 2005-09-29 2006-09-29 Dust burning device

Publications (2)

Publication Number Publication Date
EP1931914A1 EP1931914A1 (en) 2008-06-18
EP1931914B1 true EP1931914B1 (en) 2010-01-20

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ID=37660247

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06805945A Not-in-force EP1931914B1 (en) 2005-09-29 2006-09-29 Burning device for pulverized fuel

Country Status (4)

Country Link
EP (1) EP1931914B1 (en)
AT (1) ATE456005T1 (en)
DE (2) DE102005046831A1 (en)
WO (1) WO2007036368A1 (en)

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Publication number Priority date Publication date Assignee Title
CN104748120A (en) * 2015-04-16 2015-07-01 龙保常 Multifunctional combustor

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US3894834A (en) * 1973-10-17 1975-07-15 Airco Inc Ignition and flame stabilization system for coal-air furnace
DE2933060B1 (en) 1979-08-16 1980-10-30 Steinmueller Gmbh L & C Burner for burning dusty fuels
DE3131962C2 (en) 1981-08-13 1985-07-25 Steag Ag, 4300 Essen Power burners for pulverulent fuels
FR2522115B1 (en) * 1982-02-22 1986-02-28 Lafarge Conseils BURNER OPERATING ON COAL OR IN COMBINATION
DE3535873A1 (en) 1985-10-08 1987-04-09 Theo Dipl Ing Burkard Process for low-NOx combustion by means of a free-radical-forming medium
DE3738064A1 (en) 1987-11-09 1989-05-24 Stubinen Utvecklings Ab DEVICE FOR BURNING SOLID FUELS, IN PARTICULAR COAL, Peat, OR THE LIKE, IN POWDERED FORM
DE4325643A1 (en) * 1993-07-30 1995-02-02 Lentjes Kraftwerkstechnik Burners for burning dusty fuel
DE4435640C2 (en) * 1994-10-06 2001-01-04 Steinmueller Gmbh L & C Burners for the combustion of dusty fuel
DE19607676A1 (en) * 1996-02-29 1997-09-11 Steinmueller Gmbh L & C Burner for coal dust and air mixture
US6474250B1 (en) * 2001-05-24 2002-11-05 Babcock Borsig Power, Inc. Nozzle assembly for a pulverized coal burner
DE102004059679B4 (en) * 2003-12-16 2005-12-22 Alstom Power Boiler Gmbh Round burner for combustion of dusty fuel

Also Published As

Publication number Publication date
ATE456005T1 (en) 2010-02-15
EP1931914A1 (en) 2008-06-18
DE502006005997D1 (en) 2010-03-11
DE102005046831A1 (en) 2007-04-12
WO2007036368A1 (en) 2007-04-05

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