EP0227928A2 - Waste heat boiler for dust-laden gases - Google Patents

Waste heat boiler for dust-laden gases Download PDF

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Publication number
EP0227928A2
EP0227928A2 EP86115669A EP86115669A EP0227928A2 EP 0227928 A2 EP0227928 A2 EP 0227928A2 EP 86115669 A EP86115669 A EP 86115669A EP 86115669 A EP86115669 A EP 86115669A EP 0227928 A2 EP0227928 A2 EP 0227928A2
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EP
European Patent Office
Prior art keywords
waste heat
gas
boiler
train
dust
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EP86115669A
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German (de)
French (fr)
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EP0227928A3 (en
Inventor
Horst Mohrenstecher
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Hitachi Zosen Inova Steinmueller GmbH
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L&C Steinmueller GmbH
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Publication of EP0227928A2 publication Critical patent/EP0227928A2/en
Publication of EP0227928A3 publication Critical patent/EP0227928A3/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B1/00—Methods of steam generation characterised by form of heating method
    • F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
    • F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
    • F22B1/1869—Hot gas water tube boilers not provided for in F22B1/1807 - F22B1/1861
    • F22B1/1876—Hot gas water tube boilers not provided for in F22B1/1807 - F22B1/1861 the hot gas being loaded with particles, e.g. dust

Definitions

  • the invention relates to a waste heat boiler for the recovery of waste heat from a dust-laden hot gas, in particular recycle gas from a coke dryer cooler, with at least one boiler flue from which flow flows from the side via at least one horizontally extending connection channel and through which the deflected gas flows downwards, and from which Gas flow through heating surfaces.
  • an acceleration lug for the hot gas flowing into the boiler train is arranged in the transition region between the connecting duct and the boiler train is provided on the rear wall of the tank train facing away from the connecting channel, an open top dust cover channel which extends essentially over the entire rear wall, and that the cross section of the tank train not occupied by the dust removal channel is covered by a flow equalization device.
  • the acceleration lug increases the gas velocity and thus accelerates the dust particles contained in the gas stream. A substantial part of the accelerated dust particles is introduced into the dust separation channel which is open at its upper end and is thus removed from the gas flowing around the heating surfaces.
  • the flow equalization device is provided.
  • the dust separation channel is connected at its lower end at least on the gas side to the gas flow emerging from the boiler train.
  • the expression "at least on the gas side” means that the gas introduced into the dust separation channel can also be supplied to a dust separation located outside the boiler train and only the dust-free gas can be discharged through the Heating surfaces guided gas flow is supplied.
  • a particularly simple and effective construction of the flow equalization device is achieved if it is designed like a grid.
  • the boiler train has a wall bore, a cooled grid can be easily achieved if it is constructed from pipe sections of the wall bore which are guided horizontally and in at least two layers one above the other.
  • the partial gas flow through the dust separation channel can be adjusted. This can be achieved in a simple manner in that at least one adjustable slide or a corresponding flap is assigned to the lower end of the dust separation channel.
  • the descending boiler train is followed by an ascending boiler train.
  • the partial gas flow is fed into the area of the connection of the two boiler trains, each provided with an ash funnel.
  • a particularly advantageous embodiment of the waste heat boiler is achieved if not only the rear wall of the boiler train assigned to the dust separation channel is constructed as a tube wall, but also the wall separating the dust separation channel from the main gas flow cross section of the boiler train. In this case, the gas flowing through the dust separation channel and the dust contained in it are cooled to a substantial extent.
  • hot gas G loaded with coke dust is fed via a horizontally extending connecting duct 1 to a waste heat boiler 2, which is constructed from a descending train 3 and an ascending train 4.
  • the two cables 3 and 4 are each provided with ash funnels 3a and 4a at their lower ends and connected by means of a connecting section 5.
  • the connection channel 1 and the upper section 3a of the descending train are provided with a lining 6.
  • the first one Train equipped with several pressure flaps 7.
  • an acceleration nose 1a is provided on the wall below, which narrows the inlet cross section of the gas G and thus accelerates the gas flow G.
  • a section 3b following section 3a has a wall bore 8 which, in the case of a rectangular boiler cross section, consists of two opposite outer wall sections 8a and 8b and two opposite small wall sections 8c and 8d.
  • a further tube wall 9 is arranged at a distance from the wall section 8a, so that a dust separation channel 10 open at the top is delimited between the wall sections 8a and 9 and parts of the small wall sections 8c and 8d.
  • a plurality of heating surfaces 11, 12 and 13 are arranged in the free space spanned between the wall sections 8b, 8c and 8d and the tube wall 9.
  • the wall bore 8 and the heating surfaces 11, 12 and 13 are connected to distributors or collectors 14 in a manner known per se.
  • a part of the tubes of the tube wall 9 is bent horizontally at its upper end and brought together with the tubes of the tube wall 8b, so that a first horizontal position 15 of tube sections results.
  • the layers 15 and 16 lying one above the other build up a lattice-like flow equalization device which ensures an equalization of the gas flow flowing into the touch heating surfaces 11.
  • the dust separating channel 10 is connected via a connecting channel 17 to an adjusting slide device 18, in which an adjusting slide 19 is arranged so that the partial flow flowing through the dust separating channel 10 can be varied.
  • an adaptation to different load conditions and an adaptation to the different flow resistances in the main cross-section of the boiler train and in the dust separation channel 10 is possible.
  • the partial flow is introduced into the connecting section 5.
  • the gas leaving the adjusting device 18 and not dedusted gas is introduced via one or more channels extending into the area of the funnel 3a, so that the dust directly into the funnel 3a submit and is not entered via the connecting channel 5 in the second train.
  • the second train 4 is also provided in the usual way with heating surfaces 21.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Coke Industry (AREA)

Abstract

In a waste heat boiler (2) for the recovery of waste heat from a dust-laden hot gas, in particular circuit gas from a coke drying cooler, with at least one boiler flue (3) which is flowed towards from the side via at least one horizontally extending connection channel (1) and flowed through downwards by the diverted gas and has wall piping (8) and heating surfaces (11, 13, 14) flowed through by the gas, it is envisaged according to the invention that there is arranged in the transition region from connection channel (1) to boiler flue (3) an accelerating nose (1a) for the hot gas (G) flowing into the boiler flue, that there is provided on the rear wall (8a) of the boiler flue (3), which faces away from the connection channel (1), a dust separation channel (10) which is open at the top and extends essentially over the entire rear wall, and that the cross-section of the boiler flue (3), which is not included by the dust separation channel, is covered by a flow averaging device (15, 16). <IMAGE>

Description

Die Erfindung betrifft einen Abhitzekessel für die Rückgewinnung von Abwärme aus einem staubbeladenen heißen Gas, insbesondere Kreislaufgas aus einem Kokstrockenkühler, mit mindestens einem von der Seite über mindestens einen sich horizontal erstreckenden Anschlußkanal angeströmten und von dem umgelenkten Gas nach unten durchströmten Kesselzug mit Wandberohrung und von dem Gas durchströmten Heizflächen.The invention relates to a waste heat boiler for the recovery of waste heat from a dust-laden hot gas, in particular recycle gas from a coke dryer cooler, with at least one boiler flue from which flow flows from the side via at least one horizontally extending connection channel and through which the deflected gas flows downwards, and from which Gas flow through heating surfaces.

Aus "Technische Mitteilungen" (75), Heft 9, September 1982, Seite 434 ist ein solcher Abhitzekessel bekannt. Der aus dem Kokstrockenkühler mit dem Kreislaufgas ausgetragene Koksstaub ist sehr hart und führt somit insbesondere an den von dem Gas durchströmten Heizflächen zu hohem Verschleiß.Such a waste heat boiler is known from "Technische Mitteilungen" (75), number 9, September 1982, page 434. The coke dust discharged from the coke dry cooler with the cycle gas is very hard and thus leads to high wear, particularly on the heating surfaces through which the gas flows.

Es ist die Aufgabe der vorliegenden Erfindung, einen insbesondere einem Kokstrockenkühler nachschaltbaren Abhitzekessel zu schaffen, bei dem für eine Verschleißminderung Sorge getragen ist,It is the object of the present invention to provide a waste heat boiler which can be connected in particular to a coke dry cooler and in which care is taken to reduce wear,

Diese Aufgabe wird dadurch gelöst, daß im Übergangsbereich von Anschlußkanal und Kesselzug eine Beschleunigungsnase für das in den Kesselzug einströmende heiße Gas angeordnet ist, an der von dem Anschlußkanal abgewandten Rückwand des Kesselzuges ein oben offener und sich im wesentlichen über die gesamte Rückwand erstreckender Staubabscheidekanal vorgesehen ist, und daß der nicht vom Staubabscheidekanal eingenommene Querschnitt des Kesselzuges von einer Strömungsvergleichmäßigungseinrichtung überdeckt ist.This object is achieved in that an acceleration lug for the hot gas flowing into the boiler train is arranged in the transition region between the connecting duct and the boiler train is provided on the rear wall of the tank train facing away from the connecting channel, an open top dust cover channel which extends essentially over the entire rear wall, and that the cross section of the tank train not occupied by the dust removal channel is covered by a flow equalization device.

Bei dem erfindungsgemäßen Abhitzekessel erfolgt mittels der Beschleunigungsnase eine Erhöhung der Gasgeschwindigkeit und somit eine Beschleunigung der in dem Gasstrom enthaltenen Staubteilchen. Von den beschleunigten Staubteilchen wird ein wesentlicher Teil in den an seinem oberen Ende offenen Staubabscheidekanal eingetragen und somit aus dem die Heizflächen umströmenden Gas entfernt.In the waste heat boiler according to the invention, the acceleration lug increases the gas velocity and thus accelerates the dust particles contained in the gas stream. A substantial part of the accelerated dust particles is introduced into the dust separation channel which is open at its upper end and is thus removed from the gas flowing around the heating surfaces.

Durch die Wirkung der Beschleunigungsnase wird allerdings dem zwischen die Heizflächen eintretenden Gasstrom eine ungleichmäßige Reststaubverteilung aufgeprägt. Um dies auszugleichen, ist die Strömungsvergleichmäßigungseinrichtung vorgesehen.Due to the effect of the acceleration lug, an uneven distribution of residual dust is impressed on the gas flow entering between the heating surfaces. In order to compensate for this, the flow equalization device is provided.

Andere Einsatzgebiete außer der Trockenkühlung sind denkbar. Besonders wirkungsvoll ist jedoch der Einsatz bei Kokstrockenkühlung mit hochabrasivem Koksstaub.Areas of application other than dry cooling are conceivable. However, the use of dry coke cooling with highly abrasive coke dust is particularly effective.

Da es zweckmäßig ist, den in den Staubabscheidekanal eingetragenen Gasstrom mit dem Hauptstrom wieder zu vereinigen, wird in Weiterbildung der Erfindung vorgeschlagen, daß der Staubabscheidekanal an seinem unteren Ende zumindest gasseitig mit dem aus dem Kesselzug austretenden Gasstrom verbunden ist. Der Ausdruck "zumindest gasseitig" besagt, daß das in den Staubabscheidekanal eingeführte Gas auch einer außerhalb des Kesselzuges liegenden Staubabscheidung zugeführt werden kann und nur das entstaubte Gas dem durch die Heizflächen geführten Gasstrom zugeführt wird.Since it is expedient to reunite the gas flow entered in the dust separation channel with the main flow, it is proposed in a further development of the invention that the dust separation channel is connected at its lower end at least on the gas side to the gas flow emerging from the boiler train. The expression "at least on the gas side" means that the gas introduced into the dust separation channel can also be supplied to a dust separation located outside the boiler train and only the dust-free gas can be discharged through the Heating surfaces guided gas flow is supplied.

In Sonderfällen ist es auch denkbar, den Gasteilstrom nicht mehr oder nicht vollständig zurückzuführen. Bei der Kokstrockenkühlung nimmt z.B. die Kreislaufgasmenge zu.In special cases, it is also conceivable that the partial gas flow can no longer or not be returned completely. For coke dry cooling, e.g. the amount of circulating gas.

Ein besonders einfacher und wirksamer Aufbau der Strömungsvergleichmäßigungseinrichtung wird erreicht, wenn diese gitterartig ausgebildet ist.A particularly simple and effective construction of the flow equalization device is achieved if it is designed like a grid.

Da der Kesselzug eine Wandberohrung aufweist, läßt sich auf einfache Weise ein gekühltes Gitter erreichen, wenn dieses von horizontal und in zwei mindestens Lagen übereinander geführten Rohrabschnitten der Wandberohrung aufgebaut sind.Since the boiler train has a wall bore, a cooled grid can be easily achieved if it is constructed from pipe sections of the wall bore which are guided horizontally and in at least two layers one above the other.

Wegen des Reststaubgehaltes ist es zweckmäßig, wenn das Gitter gegen Verschleiß gepanzert ist.Because of the residual dust content, it is useful if the grille is armored against wear.

Um die Staubabscheidung auch an unterschiedliche Lastzustände des Heißgaserzeugers, insbesondere des Kokstrockenkühlers, anpassen zu können, ist es sinnvoll, wenn der durch den Staubabscheidekanal geführte Gasteilstrom einstellbar ist. Dies kann auf einfache Weise dadurch erreicht werden, daß dem unteren Ende des Staubabscheidekanals mindestens ein verstellbarer Schieber oder eine entsprechende Klappe zugeordnet ist.In order to be able to adapt the dust separation to different load conditions of the hot gas generator, in particular the coke dry cooler, it is useful if the partial gas flow through the dust separation channel can be adjusted. This can be achieved in a simple manner in that at least one adjustable slide or a corresponding flap is assigned to the lower end of the dust separation channel.

Wie auch beim Ausgangspunkt der Technik ist es in einigen Anwendungsfällen von Vorteil, daß dem absteigenden Kesselzug ein aufsteigender Kesselzug nachgeschaltet ist. In einem solchen Falle wird der Gasteilstrom in den Bereich der Verbindung der beiden jeweils mit einem Aschetrichter versehenen Kesselzüge zugeführt.As with the starting point of technology, in some applications it is advantageous that the descending boiler train is followed by an ascending boiler train. In such a case, the partial gas flow is fed into the area of the connection of the two boiler trains, each provided with an ash funnel.

Wird nicht ein vom Staub befreiter Gasteilstrom zurückgeführt, sondern der staubbeladene Gasteilstrom, ist es vorteilhaft, wenn dieser über mindestens ein Rohr direkt in den Bereich des Trichters des absteigenden Kesselzuges zurückführbar ist.If not a dust-free gas partial flow is returned, but the dust-laden gas partial flow, it is advantageous if it can be returned directly into the area of the funnel of the descending boiler train via at least one pipe.

Eine besonders vorteilhafte Ausbildung des Abhitzekessels wird erreicht, wenn nicht nur die dem Staubabscheidekanal zugeordnete Rückwand des Kesselzuges als Rohrwand ausgebildet ist, sondern auch die den Staubabscheidekanal von dem Hauptgasstromquerschnitt des Kesselzuges abtrennende Wand. In diesem Falle wird das den Staubabscheidekanal durchströmende Gas und der in ihm enthaltene Staub in wesentlichem Ausmaße abgekühlt.A particularly advantageous embodiment of the waste heat boiler is achieved if not only the rear wall of the boiler train assigned to the dust separation channel is constructed as a tube wall, but also the wall separating the dust separation channel from the main gas flow cross section of the boiler train. In this case, the gas flowing through the dust separation channel and the dust contained in it are cooled to a substantial extent.

Die Erfindung soll nun anhand der beigefügten Figuren näher erläutert werden. Es zeigen:

  • Fig. 1 einen Vertikalschnitt durch eine Ausführungsform des Abhitzekessels,
  • Fig. 2 einen anderen Vertikalschnitt längs der Linie II-II in Fig. 1 und
  • Fig. 3 einen Horizontalschnitt längs der Linie III-III in Fig. 1 in Blickrichtung der Pfeile.
The invention will now be explained in more detail with reference to the accompanying figures. Show it:
  • 1 is a vertical section through an embodiment of the waste heat boiler,
  • Fig. 2 shows another vertical section along the line II-II in Fig. 1 and
  • Fig. 3 is a horizontal section along the line III-III in Fig. 1 in the direction of the arrows.

Von einem nicht gezeigten Kokstrockenkühler wird über einen sich horizontal erstreckenden Anschlußkanal 1 mit Koksstaub beladenes heißes Gas G einem Abhitzekessel 2 zugeführt, der aus einem absteigenden Zug 3 und einem aufsteigenden Zug 4 aufgebaut ist. Die beiden Züge 3 und 4 sind an ihrem unteren Ende jeweils mit Aschetrichtern 3a bzw. 4a versehen und mittels eines Verbindungsabschnittes 5 verbunden. Der Anschlußkanal 1 und der obere Abschnitt 3a des absteigenden Zuges sind mit einer Ausmauerung 6 versehen. Weiterhin ist der erste Zug mit mehreren Überdruckklappen 7 ausgerüstet. Im Übergangsbereich zwischen Anschlußkanal 1 und Abschnitt 3a auf der unten liegenden Wandung eine den Eintrittsquerschnitt des Gases G verengende und somit beschleunigend auf den Gasstrom G einwirkende Beschleungigungsnase 1a vorgesehen.From a coke dry cooler, not shown, hot gas G loaded with coke dust is fed via a horizontally extending connecting duct 1 to a waste heat boiler 2, which is constructed from a descending train 3 and an ascending train 4. The two cables 3 and 4 are each provided with ash funnels 3a and 4a at their lower ends and connected by means of a connecting section 5. The connection channel 1 and the upper section 3a of the descending train are provided with a lining 6. Furthermore, the first one Train equipped with several pressure flaps 7. In the transition area between the connecting duct 1 and section 3a, an acceleration nose 1a is provided on the wall below, which narrows the inlet cross section of the gas G and thus accelerates the gas flow G.

Ein auf den Abschnitt 3a folgende Abschnitt 3b weist eine Wandberohrung 8 auf, die bei rechteckigem Kesselquerschnitt aus zwei gegenüber liegenden Außenwandabschnitten 8a und 8b und zwei gegenüber liegenden kleinen Wandabschnitten 8c und 8d besteht.A section 3b following section 3a has a wall bore 8 which, in the case of a rectangular boiler cross section, consists of two opposite outer wall sections 8a and 8b and two opposite small wall sections 8c and 8d.

Mit Abstand von dem Wandabschnitt 8a ist eine weitere Rohrwand 9 angeordnet, so daß zwischen den Wandabschnitten 8a und 9 und Teilen der kleinen Wandabschnitte 8c und 8d ein oben offener Staubabscheidekanal 10 begrenzt ist.A further tube wall 9 is arranged at a distance from the wall section 8a, so that a dust separation channel 10 open at the top is delimited between the wall sections 8a and 9 and parts of the small wall sections 8c and 8d.

In dem zwischen den Wandabschnitten 8b, 8c und 8d und der Rohrwand 9 aufgespannten Freiraum sind mehrere Heizflächen 11, 12 und 13 angeordnet. Die Wandberohrung 8 und die Heizflächen 11, 12 und 13 sind in an sich bekannter Weise mit Verteilern bzw. Sammlern 14 verbunden.A plurality of heating surfaces 11, 12 and 13 are arranged in the free space spanned between the wall sections 8b, 8c and 8d and the tube wall 9. The wall bore 8 and the heating surfaces 11, 12 and 13 are connected to distributors or collectors 14 in a manner known per se.

Wie insbesondere aus der Fig. 3 ersichtlich ist, ist ein Teil der Rohre der Rohrwandung 9 an ihrem oberen Ende horizontal umgebogen und mit den Rohren der Rohrwandung 8b zusammengeführt, so daß sich eine erste horizontale Lage 15 von Rohrabschnitten ergibt.As can be seen in particular from FIG. 3, a part of the tubes of the tube wall 9 is bent horizontally at its upper end and brought together with the tubes of the tube wall 8b, so that a first horizontal position 15 of tube sections results.

Desweiteren ist eine Teil der Rohre des Abschnittes 8c (bei der Ausführungsform gem. Fig. 3 jedes zweite) horizontal geführt und mit den Rohren des gegenüber liegenden Wandabschnittes 8d unter Ausbildung einer unter der Lage 15 liegenden Lage 16 verbunden.Furthermore, some of the tubes of section 8c (in the embodiment according to FIG. 3 every second) are guided horizontally and connected to the tubes of the opposite wall section 8d to form a layer 16 lying under layer 15.

Die übereinander liegenden Lagen 15 und 16 bauen eine gitterartige Strömungsvergleichmäßigungseinrichtung auf, die für eine Vergleichmäßigung des in die Berührungsheizflächen 11 einströmenden Gasstromes sorgt.The layers 15 and 16 lying one above the other build up a lattice-like flow equalization device which ensures an equalization of the gas flow flowing into the touch heating surfaces 11.

An seinem unteren Ende ist der Staubabscheidekanal 10 über einen Verbindungskanal 17 mit einer Stellschiebereinrichtung 18 verbunden, in der ein Stellschieber 19 verstellbar angeordnet ist, so daß der durch den Staubabscheidekanal 10 strömende Teilstrom variiert werden kann. Durch Verstellung des Stellschiebers 19 ist eine Anpassung an verschiedene Lastzustände und eine Anpassung an die unterschiedlichen Strömungswiderstände im Hauptquerschnitt des Kesselzuges und im Staubabscheidekanal 10 möglich. Der Teilstrom wird in den Verbindungsabschnitt 5 eingeführt. Wie in der Fig. 1 gestrichelt dargestellt, kann es zweckmäßig sein, daß das die Einstelleinrichtung 18 verlassende und nicht entstaubte Gas über ein oder mehrere bis in den Bereich des Trichters 3a sich erstreckende Kanäle eingeführt wird, so daß der Staub direkt in den Trichter 3a abgeben und nicht über den Verbindungskanal 5 mit in den zweiten Zug eingetragen wird.At its lower end, the dust separating channel 10 is connected via a connecting channel 17 to an adjusting slide device 18, in which an adjusting slide 19 is arranged so that the partial flow flowing through the dust separating channel 10 can be varied. By adjusting the slide valve 19, an adaptation to different load conditions and an adaptation to the different flow resistances in the main cross-section of the boiler train and in the dust separation channel 10 is possible. The partial flow is introduced into the connecting section 5. As shown in dashed lines in Fig. 1, it may be appropriate that the gas leaving the adjusting device 18 and not dedusted gas is introduced via one or more channels extending into the area of the funnel 3a, so that the dust directly into the funnel 3a submit and is not entered via the connecting channel 5 in the second train.

Der zweite Zug 4 ist in üblicher Weise ebenfalls mit Heizflächen 21 versehen.The second train 4 is also provided in the usual way with heating surfaces 21.

Claims (10)

1. Abhitzekessel für die Rückgewinnung von Abwärme aus einem staubbeladenen heißen Gas, insbesondere Kreislaufgas aus einem Kokstrockenkühler, mit mindestens einem von der Seite über mindestens einen sich horizontal erstreckenden Anschlußkanal angeströmten und von dem umgelenkten Gas nach unten durchströmten Kesselzug mit Wandberohrung und von dem Gas durchströmten Heizflächen, dadurch gekennzeichnet, daß im Übergangsbereich von Anschlußkanal (1) und Kesselzug (3) eine Beschleunigungsnase (1a) für das in den Kesselzug einströmende heiße Gas (G) angeordnet ist, daß an der von dem Anschlußkanal (1) abgewandten Rückwand (8a) des Kesselzuges (3) ein oben offener und sich im wesentlichen über die gesamte Rückwand erstreckender Staubabscheidekanal (10) vorgesehen ist, und daß der nicht vom Staubabscheidekanal eingenommene Querschnitt des Kesselzuges (3) von einer Strömungsvergleichmäßigungseinrichtung (15, 16) überdeckt ist.1. waste heat boiler for the recovery of waste heat from a dust-laden hot gas, in particular recycle gas from a coke dryer cooler, with at least one boiler flue from which flow flows from the side via at least one horizontally extending connection channel and through which the deflected gas flows downwards and through which the gas flows Heating surfaces, characterized in that an acceleration lug (1a) for the hot gas (G) flowing into the boiler train is arranged in the transition region from the connection channel (1) and the boiler train (3), that on the rear wall (8a ) of the tank train (3) an open and above the entire rear wall extending dust separation channel (10) is provided, and that the cross section of the tank train (3) not occupied by the dust separation channel is covered by a flow equalization device (15, 16). 2. Abhitzekessel nach Anspruch 1, dadurch gekennzeichnet, daß der Staubabscheidekanal (10) an seinem unteren Ende zumindest gasseitig mit dem aus dem Kesselzug austretenden Gasstrom verbunden ist.2. Waste heat boiler according to claim 1, characterized in that the dust separation channel (10) is connected at its lower end at least on the gas side to the gas stream emerging from the boiler train. 3. Abhitzekessel nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Strömungsvergleichmäßigungseinrichtung (15, 16) gitterartig ausgebildet ist.3. waste heat boiler according to claim 1 or 2, characterized characterized in that the flow equalization device (15, 16) is formed like a grid. 4. Abhitzekessel nach Anspruch 3, dadurch gekennzeichnet, daß das Gitter von horizontal und in mindestens zwei Lagen (15, 16) übereinander geführten Rohrabschnitten der Wandberohrung (8) aufgebaut ist.4. waste heat boiler according to claim 3, characterized in that the grid of horizontal and in at least two layers (15, 16) one above the other pipe sections of the wall bore (8) is constructed. 5. Abhitzekessel nach Anspruch 3 oder 4, dadurch gekennzeichnet, daß das Gitter gegen Verschleiß gepanzert ist.5. waste heat boiler according to claim 3 or 4, characterized in that the grid is armored against wear. 6. Abhitzekessel nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß der durch den Staubabscheidekanal (10) geführte Gasteilstrom einstellbar ist.6. Waste heat boiler according to one of claims 1 to 5, characterized in that the partial gas flow guided through the dust separation channel (10) is adjustable. 7. Abhitzekessel nach Anspruch 6, dadurch gekennzeichnet, daß dem unteren Ende des Staubabscheidekanals (10) mindestens ein verstellbarer Schieber (19) zugeordnet ist.7. waste heat boiler according to claim 6, characterized in that the lower end of the dust separation channel (10) is assigned at least one adjustable slide (19). 8. Abhitzekessel nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß dem absteigenden Kesselzug (3) ein aufsteigender Kesselzug (4) nachgeschaltet ist, und der Gasteilstrom aus dem Staubabscheidekanal in dem Bereich der Verbindung (5) der beiden jeweils mit einem Aschetrichter (3a; 4a) versehenen Kesselzüge zuführbar ist.8. waste heat boiler according to one of claims 1 to 7, characterized in that the descending boiler train (3) is followed by an ascending boiler train (4), and the partial gas flow from the dust separation channel in the region of the connection (5) of the two, each with an ash funnel (3a; 4a) provided boiler trains can be fed. 9. Abhitzekessel nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß bei Rückführung eines staubbeladenen Gasteilstromes dieser über mindestens ein Rohr (20) direkt in den Bereich des Trichters (3a) des absteigenden Kesselzuges (3) zurückführbar ist.9. waste heat boiler according to one of claims 1 to 8, characterized in that when returning a dust-laden gas partial flow this via at least one tube (20) directly into the Area of the funnel (3a) of the descending boiler train (3) is traceable. 10. Abhitzekessel nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß außer der dem Staubabscheidekanal (10) zugeordneten Rückwand (8a) des Kesselzuges (3) auch die den Staubabscheidekanal (10) von dem Hauptgasstromquerschnitt des Kesselzuges abtrennende Wand (9) als Rohrwand ausgebildet ist.10. Waste heat boiler according to one of claims 1 to 9, characterized in that in addition to the dust separating channel (10) associated rear wall (8a) of the boiler train (3) and the dust separating channel (10) from the main gas flow cross section of the boiler train separating wall (9) as Pipe wall is formed.
EP86115669A 1985-12-04 1986-11-12 Waste heat boiler for dust-laden gases Withdrawn EP0227928A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3542803 1985-12-04
DE3542803A DE3542803C1 (en) 1985-12-04 1985-12-04

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EP0227928A2 true EP0227928A2 (en) 1987-07-08
EP0227928A3 EP0227928A3 (en) 1988-03-02

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EP86115669A Withdrawn EP0227928A3 (en) 1985-12-04 1986-11-12 Waste heat boiler for dust-laden gases

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EP (1) EP0227928A3 (en)
DE (1) DE3542803C1 (en)
ZA (1) ZA869136B (en)

Cited By (4)

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Publication number Priority date Publication date Assignee Title
CN102966944A (en) * 2012-12-11 2013-03-13 中国东方电气集团有限公司 CFB (Circulating Fluidized Bed)-rotary radiation boiler for reducing contamination of high-alkalinity coal
EP2857746A1 (en) * 2013-10-03 2015-04-08 Babcock & Wilcox Power Generation Group, Inc. Advanced ultra supercritical steam generator
CN105423276A (en) * 2015-12-22 2016-03-23 绵阳市鑫科源环保科技有限公司 Afterheat recovering device for high-temperature dust-containing smoke
IT201900022395A1 (en) * 2019-11-28 2021-05-28 Ac Boilers S P A RECOVERY BOILER AND SYSTEM INCLUDING THIS RECOVERY BOILER

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101334156B (en) * 2008-07-22 2011-09-28 马龙根 Red coke waste heat boiler
ITUB20160984A1 (en) * 2016-02-25 2017-08-25 Turboden Srl DIRECT HEAT EXCHANGER FOR ORGANIC RANKINE CYCLE SYSTEMS

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DE1085890B (en) * 1954-08-09 1960-07-28 Mont Kessel Herpen & Co Komm G Contact heating surface consisting of pipe panels for waste heat water pipe boiler
US3237677A (en) * 1964-03-23 1966-03-01 Alcorn Comb Co Heater and process suitable for lean gaseous fuels
US3396781A (en) * 1965-12-08 1968-08-13 Humphreys & Glasgow Ltd Process and apparatus for the recovery of waste heat

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US2908632A (en) * 1953-10-07 1959-10-13 Babcock & Wilcox Co Supercritical pressure steam heating process
DE1085890B (en) * 1954-08-09 1960-07-28 Mont Kessel Herpen & Co Komm G Contact heating surface consisting of pipe panels for waste heat water pipe boiler
US3237677A (en) * 1964-03-23 1966-03-01 Alcorn Comb Co Heater and process suitable for lean gaseous fuels
US3396781A (en) * 1965-12-08 1968-08-13 Humphreys & Glasgow Ltd Process and apparatus for the recovery of waste heat

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102966944A (en) * 2012-12-11 2013-03-13 中国东方电气集团有限公司 CFB (Circulating Fluidized Bed)-rotary radiation boiler for reducing contamination of high-alkalinity coal
CN102966944B (en) * 2012-12-11 2015-05-13 中国东方电气集团有限公司 CFB (Circulating Fluidized Bed)-rotary radiation boiler for reducing contamination of high-alkalinity coal
EP2857746A1 (en) * 2013-10-03 2015-04-08 Babcock & Wilcox Power Generation Group, Inc. Advanced ultra supercritical steam generator
CN105423276A (en) * 2015-12-22 2016-03-23 绵阳市鑫科源环保科技有限公司 Afterheat recovering device for high-temperature dust-containing smoke
IT201900022395A1 (en) * 2019-11-28 2021-05-28 Ac Boilers S P A RECOVERY BOILER AND SYSTEM INCLUDING THIS RECOVERY BOILER
EP3828464A1 (en) * 2019-11-28 2021-06-02 AC Boilers S.p.A. Heat recovery boiler and plant comprising said heat recovery boiler

Also Published As

Publication number Publication date
EP0227928A3 (en) 1988-03-02
DE3542803C1 (en) 1987-01-29
ZA869136B (en) 1987-08-26

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