EP1108185B1 - Method for thermally regenerating the heat exchanger material of a regenerative post-combustion device - Google Patents

Method for thermally regenerating the heat exchanger material of a regenerative post-combustion device Download PDF

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Publication number
EP1108185B1
EP1108185B1 EP00942004A EP00942004A EP1108185B1 EP 1108185 B1 EP1108185 B1 EP 1108185B1 EP 00942004 A EP00942004 A EP 00942004A EP 00942004 A EP00942004 A EP 00942004A EP 1108185 B1 EP1108185 B1 EP 1108185B1
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Prior art keywords
heat exchanger
exchanger material
segment
air
combustion chamber
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EP00942004A
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German (de)
French (fr)
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EP1108185A1 (en
Inventor
Walter PÖTZL
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Eisenmann Maschinenbau Kg(komplementaer Eisenmann
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Eisenmann Anlagenbau GmbH and Co KG
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
    • F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
    • F23G7/061—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating
    • F23G7/065—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating using gaseous or liquid fuel
    • F23G7/066—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating using gaseous or liquid fuel preheating the waste gas by the heat of the combustion, e.g. recuperation type incinerator
    • F23G7/068—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating using gaseous or liquid fuel preheating the waste gas by the heat of the combustion, e.g. recuperation type incinerator using regenerative heat recovery means

Definitions

  • Regenerative afterburners are used Purification of polluted exhaust gases from industrial processes. To save energy in thermal Afterburning the exhaust gases to be cleaned are Passed heat exchanger material. Because the ones to be cleaned Exhaust gases often contain organic contaminants Form of condensable substances, e.g. tar products, or contain organic dusts, the surfaces settle of these heat exchanger materials in the course of Operation with these contaminants. For regeneration the heat exchanger material must periodically on a Temperature are heated at which the at the Dissolve surface adsorbed contaminants and remove can be. This happens with the known thermal afterburners in that Fresh air brought into the combustion chamber, there heated to high temperature and then from above passed down through the heat exchanger material, fed to the outlet via the rotary distributor and then is disposed of via the chimney into the outside atmosphere.
  • the Rotary distributor is in this process. Waiting for until the segment of the heat exchanger material that is flushed through from top to bottom on the required Has heated temperature so that all areas of the heat exchanger material in this segment of contaminants be freed. Then the rotary distributor is turned on Segment rotates and the process starts again.
  • a disadvantage of this known regeneration method the heat exchanger material is proportionate long time necessary to clean all segments is. It also contains what is fed into the fireplace Gas the contaminants that come from the heat exchanger material have solved, and is therefore not clean.
  • the object of the present invention is a method of the type mentioned in such a way that the thermal regeneration takes place quickly and moreover, no impurities in the ambient atmosphere be delivered.
  • this object is achieved by that the air used for thermal regeneration in the combustion chamber is removed from the combustion chamber and returned to the inlet for exhaust gas to be cleaned, while the outlet for cleaned gas is closed, and that this air is circulated until the rotary distributor is rotating until the entire heat exchanger material is sufficiently heated and all impurities have been removed from it.
  • the regenerative afterburning device is in the drawing with the reference number 1.
  • Their basic structure and their basic functionality are - unless otherwise stated below is said - in EP 0 548 630 A1 or EP 0 719 984 A2, to which express reference is made.
  • an inlet space 3 for the exhaust air to be cleaned, via an inlet line 4 is supplied.
  • Rotary distributor 5 is a depending on its rotational position Connection between the inlet space 3 and a segment from a multitude of pie-shaped segments in one Distribution space 6 located above inlet space 3 forth.
  • a heat exchange space 7, which in a corresponding Number of segments is divided, each with a corresponding segment of the one below Communicate distribution spaces.
  • the segments of the heat exchange room 7 are filled with heat exchanger material.
  • a combustion chamber 8 in which opens a burner 9.
  • the rotary distributor 5 is designed in a known manner that he has another segment of the distribution space 6, which generally diametrically opposed to the former segment, and thus also another segment of the heat exchanger room 7 with an outlet line 10 for cleaned Gas connects. Finally, the rotary distributor 5 a connection between that segment of the distribution space 6 and thus the heat exchange chamber 7 with a Purge air line 11 ago, in the direction of rotation of the rotary distributor 5 seen ahead of the segment which communicates with the outlet line 10.
  • the outlet line 10 for purified gas introduces a motor-controlled valve 12 and a blower 13, a another motor-controlled valve 14 and a silencer 15 to a chimney 16.
  • a return line 17 from which another motor-controlled Valve 18 with the inlet line 4 for to be cleaned Exhaust gas is connected.
  • the purge air line 11 already mentioned, in the one another motor-controlled valve 19 is located.
  • the purge air line 11 also opens between the valve 19 and the inlet to the regenerative afterburner 1 a fresh air line connected to the outside atmosphere 20, which is controlled by a further motor-controlled valve 21 is lockable.
  • the air circulation described is ongoing Rotary distributor 5 performed until the heat exchanger material even in the lowest areas Temperature at which the deposits are removed from the heat exchanger material. These contaminants are then removed from the circulating Air is brought into the combustion chamber 8 and burned there. If this process is finished, so the various motorized valves are back returned to the starting position and the feed of exhaust air to be cleaned via the inlet line 4 is resumed.

Abstract

In order to regenerate the heat exchanger material located in the various segments of a housing section (2) of a regenerative post-combustion device (1), air is heated in the combustion chamber (8) of this post-combustion device (1) by a burner (9), is directly removed from the combustion chamber (8), is adjusted to the desired regeneration air temperature using fresh air, and is returned to the inlet (4) of the thermal post-combustion device (1). The outlet (10) of the thermal post-combustion device (1) remains closed during this operation. The rotary distributor (5) of the thermal post-combustion device (1) rotates during this process which is continued until all segments of the heat exchanger material are heated to a temperature at which the contaminants absorbed by the heat exchanger materials are released and combusted in the combustion chamber (8).

Description

Die Erfindung betrifft ein Verfahren zur thermischen Regeneration des Wärmetauschermaterials einer regenerativen Nachverbrennungsvorrichtung, welche in einem Gehäuse von oben nach unten umfaßt:

  • a) einen Verbrennungsraum;
  • b) einen Abschnitt, der in mehrere mit Wärmetauschermaterial gefüllte Segmente unterteilt ist;
  • c) einen Drehverteiler, der entsprechend seiner Drehstellung herstellt:
  • ca) eine Verbindung zwischen einem Einlaß für zu reinigendes Abgas mit einem ersten Segment des Wärmetauschermaterials;
  • cb) eine Verbindung zwischen einem zweiten Segment des Wärmetauschermaterials und einem Auslaß für gereinigtes Gas;
  • cc) eine Verbindung zwischen einem dritten, dem zweiten Segment in Drehrichtung des Drehverteilers vorauseilenden Segment des Wärmetauschermaterials und einem Ein- oder Auslaß für Spülgas,
    • bei welchem Verfahren Luft in der Verbrennungskammer erhitzt, dieser entnommen, mit Frischluft auf die gewünschte Regenerierlufttemperatur eingestellt und nacheinander durch alle Segmente des Wärmetauschermaterials geleitet wird, wodurch das Wärmetauschermaterial auf eine Temperatur gebracht wird, bei welcher sich die am Wärmetauschermaterial adsorbierten Verunreinigungen lösen.The invention relates to a method for thermal regeneration of the heat exchanger material of a regenerative afterburning device, which comprises in a housing from top to bottom:
  • a) a combustion chamber;
  • b) a section which is divided into several segments filled with heat exchanger material;
  • c) a rotary distributor that produces according to its rotary position:
  • ca) a connection between an inlet for exhaust gas to be cleaned with a first segment of the heat exchanger material;
  • cb) a connection between a second segment of the heat exchange material and an outlet for purified gas;
  • cc) a connection between a third segment of the heat exchanger material leading the second segment in the direction of rotation of the rotary distributor and an inlet or outlet for purge gas,
    • Which method heats air in the combustion chamber, removes it, adjusts it to the desired regeneration air temperature with fresh air and leads it successively through all segments of the heat exchanger material, bringing the heat exchanger material to a temperature at which the impurities adsorbed on the heat exchanger material dissolve.

    Regenerative Nachverbrennungsvorrichtungen dienen der Reinigung verunreinigter Abgase aus industriellen Prozessen. Zur Einsparung von Energie bei der thermischen Nachverbrennung werden die zu reinigenden Abgase durch Wärmetauschermaterial hindurch geführt. Da die zu reinigenden Abgase häufig organische Verunreinigungen in Form kondensierbarer Substanzen, z.B. Teerprodukte, oder organische Stäube enthalten, setzen sich die Oberflächen dieser Wärmetauschermaterialien im Laufe des Betriebes mit diesen Verunreinigungen zu. Zur Regeneration muß das Wärmetauschermaterial periodisch auf eine Temperatur erhitzt werden, bei welcher sich die an der Oberfläche adsorbierten Verunreinigungen lösen und ausgetragen werden können. Dies geschieht bei den bekannten thermischen Nachverbrennungsvorrichtungen dadurch, daß Frischluft in die Verbrennungskammer eingebracht, dort auf hohe Temperatur erhitzt und sodann von oben her durch das Wärmetauschermaterial nach unten geleitet, über den Drehverteiler dem Auslaß zugeführt und sodann über den Kamin in die Außenatmosphäre entsorgt wird. Der Drehverteiler steht bei diesem Vorgang. Es wird zugewartet, bis sich das jeweils durchspülte Segment des Wärmetauschermaterials von oben bis nach unten auf die erforderliche Temperatur erhitzt hat, so daß alle Bereiche des Wärmetauschermaterials in diesem Segment von Verunreinigungen befreit werden. Danach wird der Drehverteiler um ein Segment verdreht und der Vorgang beginnt von neuem. Nachteilig bei diesem bekannten verfahren zur Regeneration des Wärmetauschermaterials ist zum einen die verhältnismäßig lange Zeit, die zur Reinigung aller Segmente notwendig ist. Darüber hinaus enthält das dem Kamin zugeleitete Gas die Verunreinigungen, die sich vom Wärmetauschermaterial gelöst haben, und ist somit nicht sauber.Regenerative afterburners are used Purification of polluted exhaust gases from industrial processes. To save energy in thermal Afterburning the exhaust gases to be cleaned are Passed heat exchanger material. Because the ones to be cleaned Exhaust gases often contain organic contaminants Form of condensable substances, e.g. tar products, or contain organic dusts, the surfaces settle of these heat exchanger materials in the course of Operation with these contaminants. For regeneration the heat exchanger material must periodically on a Temperature are heated at which the at the Dissolve surface adsorbed contaminants and remove can be. This happens with the known thermal afterburners in that Fresh air brought into the combustion chamber, there heated to high temperature and then from above passed down through the heat exchanger material, fed to the outlet via the rotary distributor and then is disposed of via the chimney into the outside atmosphere. The Rotary distributor is in this process. Waiting for until the segment of the heat exchanger material that is flushed through from top to bottom on the required Has heated temperature so that all areas of the heat exchanger material in this segment of contaminants be freed. Then the rotary distributor is turned on Segment rotates and the process starts again. A disadvantage of this known regeneration method the heat exchanger material is proportionate long time necessary to clean all segments is. It also contains what is fed into the fireplace Gas the contaminants that come from the heat exchanger material have solved, and is therefore not clean.

    Aufgabe der vorliegenden Erfindung ist es, ein Verfahren der eingangs genannten Art so auszugestalten, daß die thermische Regeneration schnell vonstatten geht und darüber hinaus keine Verunreinigungen in die Umgebungsatmosphäre abgegeben werden.The object of the present invention is a method of the type mentioned in such a way that the thermal regeneration takes place quickly and moreover, no impurities in the ambient atmosphere be delivered.

    Diese Aufgabe wird erfindungsgemäß dadurch gelöst,
    daß die zur thermischen Regeneration verwendete in der Verbrennungskammer erhitzte Luft dem-Verbrennungsraum entnommen und zum Einlaß für zu reinigendes Abgas zurückgeführt wird, während der Auslaß für gereinigtes Gas geschlossen ist, und daß diese Luft so lange bei sich drehendem Drehverteiler im Kreislauf geführt wird, bis das gesamte Wärmetauschermaterial ausreichend erhitzt ist und sich alle Verunreinigungen von diesem gelöst haben.    According to the invention, this object is achieved by
    that the air used for thermal regeneration in the combustion chamber is removed from the combustion chamber and returned to the inlet for exhaust gas to be cleaned, while the outlet for cleaned gas is closed, and that this air is circulated until the rotary distributor is rotating until the entire heat exchanger material is sufficiently heated and all impurities have been removed from it.

    Durch die erfindungsgemäß vorgesehene Rezirkulation der erhitzten Luft zum Einlaß wird zweierlei erreicht:

  • Zum einen wird das jeweils beaufschlagte Segment des Wärmetauschermaterials von unten her erhitzt, also von einer Seite, die normalerweise verhältnismäßig kühl ist, da sie von der Verbrennungskammer weit entfernt ist. Auf diese Weise läßt sich eine einheitliche Erwärmung des Wärmetauschermaterials im Segment schneller erzielen, als wenn dieses Segment von der Verbrennungskammer her mit Heißluft beaufschlagt würde. Zum anderen wird bei der erfindungsgemäßen Vorgehensweise die Luft, welche vom Wärmetauschermaterial gelöste Verunreinigungen mit sich führt, in den Verbrennungsraum eingebracht, wo diese Verunreinigungen verbrannt und damit unschädlich gemacht werden. Über den Kamin wird somit nur von Verunreinigungen vollständig befreite Luft in die Umgebung abgegeben.
    • The recirculation of the heated air to the inlet provided according to the invention achieves two things:
  • On the one hand, the segment of the heat exchanger material which is acted upon is heated from below, that is to say from a side which is normally relatively cool since it is far away from the combustion chamber. In this way, uniform heating of the heat exchanger material in the segment can be achieved faster than if this segment were subjected to hot air from the combustion chamber. On the other hand, in the procedure according to the invention, the air, which carries impurities dissolved by the heat exchanger material with it, is introduced into the combustion chamber, where these impurities are burned and thus rendered harmless. Only air that has been completely freed of impurities is released into the environment via the chimney.

    • Ein Ausführungsbeispiel der Erfindung wird nachfolgend anhand der Zeichnung näher erläutert; die einzige Figur zeigt schematisch eine regenerative Nachverbrennungsvorrichtung mit den wichtigsten zu deren Betrieb erforderlichen peripheren Einrichtungen.An embodiment of the invention is as follows explained in more detail with reference to the drawing; the only figure shows schematically a regenerative afterburning device with the most important ones necessary for their operation peripheral facilities.

    Die regenerative Nachverbrennungsvorrichtung ist in der Zeichnung-mit dem Bezugszeichen 1 gekennzeichnet. Ihr grundsätzlicher Aufbau und ihre grundsätzliche Funktionsweise sind - soweit nachfolgend nichts anderes gesagt ist - in der EP 0 548 630 A1 oder der EP 0 719 984 A2 beschrieben, worauf ausdrücklich verwiesen wird.The regenerative afterburning device is in the drawing with the reference number 1. Their basic structure and their basic functionality are - unless otherwise stated below is said - in EP 0 548 630 A1 or EP 0 719 984 A2, to which express reference is made.

    Im unteren Bereich des Gehäuses 2 der regenerativen Nachverbrennungsvorrichtung 1 befindet sich ein Einlaßraum 3 für die zu reinigende Abluft, die über eine Einlaßleitung 4 zugeführt wird. Ein im Einlaßraum 3 angeordneter Drehverteiler 5 stellt je nach seiner Drehstellung eine Verbindung zwischen dem Einlaßraum 3 und einem Segment aus einer Vielzahl tortenstückförmiger Segmente in einem Oberhalb des Einlaßraumes 3 befindlichen Verteilraum 6 her. Erneut oberhalb des Verteilraumes 6 befindet sich im Gehäuse 2 ein Wärmetauschraum 7, der in eine entsprechende Anzahl von Segmenten unterteilt ist, die jeweils mit einem entsprechenden Segment des darunter liegenden Verteilraume kommunizieren. Die Segmente des Wärmetauschraumes 7 sind mit Wärmetauschermaterial angefüllt.In the lower area of the housing 2 of the regenerative Afterburning device 1 is an inlet space 3 for the exhaust air to be cleaned, via an inlet line 4 is supplied. A arranged in the inlet space 3 Rotary distributor 5 is a depending on its rotational position Connection between the inlet space 3 and a segment from a multitude of pie-shaped segments in one Distribution space 6 located above inlet space 3 forth. Is again above the distribution room 6 in the housing 2, a heat exchange space 7, which in a corresponding Number of segments is divided, each with a corresponding segment of the one below Communicate distribution spaces. The segments of the heat exchange room 7 are filled with heat exchanger material.

    Über den Wärmetauschraum 7 befindet sich im obersten Bereich des Gehäuses 2 eine Verbrennungskammer 8, in welche ein Brenner 9 mündet.About the heat exchange room 7 is in the top Area of the housing 2, a combustion chamber 8, in which opens a burner 9.

    Der Drehverteiler 5 ist in bekannter Weise so ausgebildet, daß er ein weiteres Segment des Verteilerraumes 6, welches im allgemeinen dem erstgenannten Segment diametral gegenüberliegt, und damit auch ein weiteres Segment des Wärmetauscherraumes 7 mit einer Auslaßleitung 10 für gereinigtes Gas verbindet. Schließlich stellt der Drehverteiler 5 eine Verbindung zwischen demjenigen Segment des Verteilraumes 6 und damit des Wärmetauschraumes 7 mit einer Spülluftleitung 11 her, das in Drehrichtung des Drehverteilers 5 gesehen demjenigen Segment vorauseilt, welches mit der Auslaßleitung 10 kommuniziert.The rotary distributor 5 is designed in a known manner that he has another segment of the distribution space 6, which generally diametrically opposed to the former segment, and thus also another segment of the heat exchanger room 7 with an outlet line 10 for cleaned Gas connects. Finally, the rotary distributor 5 a connection between that segment of the distribution space 6 and thus the heat exchange chamber 7 with a Purge air line 11 ago, in the direction of rotation of the rotary distributor 5 seen ahead of the segment which communicates with the outlet line 10.

    Die Auslaßleitung 10 für gereinigtes Gas führt über ein motorgesteuertes Ventil 12 sowie ein Gebläse 13, ein weiteres motorgesteuertes Ventil 14 und einen Schalldämpfer 15 zu einem Kamin 16. Zwischen dem Gebläse 13 und dem motorgesteuerten Ventil 14 zweigt eine Rückführleitung 17 ab, die über ein weiteres motorgesteuertes Ventil 18 mit der Einlaßleitung 4 für zu reinigendes Abgas verbunden ist. Von der Rückführleitung 17 zweigt die bereits erwähnte Spülluftleitung 11 ab, in der ein weiteres motorgesteuertes Ventil 19 liegt. In die Spülluftleitung 11 mündet außerdem zwischen dem Ventil 19 und dem Einlaß in die regenerative Nachverbrennungsvorrichtung 1 eine mit der Außenatmosphäre verbundene Frischluftleitung 20, die durch ein weiteres motorgesteuertes Ventil 21 verschließbar ist.The outlet line 10 for purified gas introduces a motor-controlled valve 12 and a blower 13, a another motor-controlled valve 14 and a silencer 15 to a chimney 16. Between the fan 13 and the motor-controlled valve 14 branches a return line 17 from which another motor-controlled Valve 18 with the inlet line 4 for to be cleaned Exhaust gas is connected. Branches from the return line 17 the purge air line 11 already mentioned, in the one another motor-controlled valve 19 is located. In the purge air line 11 also opens between the valve 19 and the inlet to the regenerative afterburner 1 a fresh air line connected to the outside atmosphere 20, which is controlled by a further motor-controlled valve 21 is lockable.

    Schließlich ist die Verbrennungskammer 8 mit der Auslaßleitung 10 für gereinigte Gase an einer Stelle zwischen dem motorgesteuerten Ventil 12 und dem Gebläse 13 verbunden; diese Verbindung läßt sich mit einem motorgesteuerten Ventil 23 öffnen oder schließen. Zwischen dem motorgesteuerten Ventil 23 und der Mündungsstelle in die Auslaßleitung 10 mündet in die Leitung 22 eine Frischluftzuführleitung 24, die ebenfalls durch ein motorgesteuertes Ventil 25 versperrbar ist.Finally, the combustion chamber 8 with the exhaust line 10 for cleaned gases at a point between connected to the motorized valve 12 and the blower 13; this connection can be done with a motorized Open or close valve 23. Between the motor-controlled valve 23 and the mouth in the outlet line 10 opens into the line 22 one Fresh air supply line 24, also through a motor-controlled valve 25 can be blocked.

    Der Normalbetrieb der regenerativen Nachverbrennungsvorrichtung 1, in welchem verunreinigte Abgase behandelt werden, entspricht dem Bekannten:

  • Das zu reinigende Abgas 4 wird über die Einlaßleitung 4 in die Einlaßkammer 3 der regenerativen Nachverbrennungsvorrichtung 1 eingebracht und entsprechend der jeweiligen Drehstellung des Drehverteilers 5 in ein bestimmtes Segment des Verteilraumes 6 weitergeleitet. Die Abluft steigt von diesem Segment des Verteilraumes 6 auf in das darüberliegende Segment des Wärmetauschraumes 7 und nimmt von dem dortigen Wärmetauschermaterial zuvor gespeicherte Wärme auf. Das Abgas erhitzt sich beim Durchgang durch das Wärmetauschermaterial, bis es beim Austritt aus der Oberseite aus dem Wärmetauschraum 7 die Entzündungstemperatur für die in ihm enthaltenen Verunreinigungen entweder erreicht hat oder dieser Entzündungstemperatur nahekommt. Im letzteren Falle wird mit Hilfe des Brenners 9 die Verbrennung der Verunreinigungen durchgeführt; im ersten Falle findet die Verbrennung ohne Zufuhr äußerer Energie statt.
    • The normal operation of the regenerative afterburning device 1, in which contaminated exhaust gases are treated, corresponds to the known:
  • The exhaust gas 4 to be cleaned is introduced via the inlet line 4 into the inlet chamber 3 of the regenerative afterburning device 1 and is passed on to a specific segment of the distribution chamber 6 in accordance with the respective rotational position of the rotary distributor 5. The exhaust air rises from this segment of the distribution space 6 into the overlying segment of the heat exchange space 7 and absorbs heat previously stored by the heat exchange material there. The exhaust gas heats up as it passes through the heat exchanger material until it has either reached the ignition temperature for the impurities contained in it or has come close to this ignition temperature when it emerges from the top of the heat exchange space 7. In the latter case, the combustion of the contaminants is carried out with the help of the burner 9; in the first case the combustion takes place without the supply of external energy.

    • Die erhitzte, nunmehr die (ungefährlichen) Verbrennungsprodukte enthaltende Luft tritt von oben her in ein Segment des Wärmetauschraumes 7 ein und durchströmt dieses nach unten. Es gibt dabei einen Großteil seiner Wärme an das dortige Wärmetauschermaterial ab und tritt an der Unterseite des Wärmetauschraumes 7, entsprechend abgekühlt, in das entsprechende Segment des Verteilraumes 6 ein und wird vom Drehverteiler 5 der Auslaßleitung 10 zugeführt. In dieser Betriebsweise sind die motorgesteuerten Ventile 12 und 14 geöffnet sowie die motorgesteuerten Ventile 18, 23, und 25 geschlossen. Die Reinluft wird mit Hilfe des Gebläses 13 über den Kamin 16 in die Außenatmosphäre ausgetragen.The heated, now the (harmless) combustion products Containing air enters a segment from above of the heat exchange chamber 7 and flows through it below. There's a lot of its warmth in it there from the heat exchanger material and occurs at the bottom the heat exchange space 7, cooled accordingly, in the corresponding segment of the distribution space 6 and is supplied from the rotary distributor 5 to the outlet line 10. The motorized valves are in this mode 12 and 14 opened as well as the motorized valves 18, 23, and 25 closed. The clean air is with With the help of the fan 13 through the chimney 16 into the outside atmosphere discharged.

    Wie bereits oben erwähnt, wird dasjenige Segment des Wärmetauschraumes 7, welches dem von Reinluft durchströmten Segment in Drehrichtung des Drehverteilers 5 vorauseilt, mit Spülluft gespült. Diese Spülung erfolgt beim dargestellten Ausführungsbeispiel etwas anders als bei den oben erwähnten Druckschriften: Hier wird nämlich über die Rückführleitung 17 und die Spülluftleitung 11 bei geöffnetem motorgesteuerten Ventil 19 und geschlossenem motorgesteuerten Ventil 21 Reinluft über den Drehverteiler 5 dem entsprechenden Segment des Wärmetauschraumes 7 zugeführt. Dieser Unterschied in der Art der Spülung ist jedoch für die grundsätzliche Betriebsweise der thermischen Nachverbrennungsvorrichtung 1 jedenfalls im vorliegenden Zusammenhang ohne Bedeutung.As already mentioned above, that segment of the Heat exchange room 7, which is flowed through by clean air Segment leads in the direction of rotation of the rotary distributor 5, flushed with purge air. This flushing takes place at illustrated embodiment slightly different than in the publications mentioned above: namely here via the return line 17 and the purge air line 11 with open motor-controlled valve 19 and closed motor-controlled valve 21 clean air over the distributor 5 the corresponding segment of the heat exchange space 7 fed. This difference in the However, the type of flushing is for the basic mode of operation the thermal afterburner 1 meaningless in the present context.

    Nach längerer Betriebszeit bedarf das im Wärmetauschraum 7 befindliche Wärmetauschermaterial einer Regeneration, da sich seine Oberflächen mit Substanzen, beispielsweise Teerprodukten oder organischen Stäuben, die vom zu reinigenden Abgas mitgeführt werden, zugesetzt haben. Diese thermische Regeneration geschieht bei der beschriebenen regenerativen Nachverbrennungsvorrichtung 1 wie folgt:

  • Die Zufuhr von zu reinigender Abluft über die Einlaßleitung 4 wird abgestellt. Die motorgesteuerten Ventile 12 und 19 werden geschlossen, dagegen werden die motorgesteuerten Ventile 14, 18, 21, 23 und 25 geöffnet.
    • After a long period of operation, the heat exchange material located in the heat exchange space 7 requires regeneration, since its surfaces have become clogged with substances, for example tar products or organic dusts, which are carried along by the exhaust gas to be cleaned. This thermal regeneration takes place in the regenerative afterburning device 1 described as follows:
  • The supply of exhaust air to be cleaned via the inlet line 4 is switched off. The motor-controlled valves 12 and 19 are closed, whereas the motor-controlled valves 14, 18, 21, 23 and 25 are opened.

    • In diesem Schaltungszustand der verschiedenen motorgesteuerten Ventile wird heiße Luft aus der Verbrennungskammer 8 entnommen. Über die Frischluftzufuhrleitung 24 wird Frischluft beigemischt und dadurch die Regenerationslufttemperatur eingestellt. Die Mischluft wird mit dem Gebläse 13 über die Leitung 22 und das geöffnete Ventil 23 angesaugt und über die Rückführleitung 17 und das geöffnete motorgesteuerte Ventil 18 in die Einlaßleitung 4 und von dort über den Einlaßraum 3, den Drehverteiler 5, das entsprechende Segment des Verteilraumes 6 einem Segment des Wärmetauschraumes 7 zugeführt. Diese Luft tritt oben wieder in die Verbrennungskammer 8 ein und wird durch den Brenner 9 erhitzt. Die heiße Luft wird auf dem geschilderten Wege zirkuliert, während der Drehverteiler 5 sich weiter dreht. Überschüssige Luft im Kreislauf wird durch entsprechende Öffnung des motorgesteuerten Ventiles 14 zum Kamin 16 hin abgeführt.In this circuit state the various motor-controlled Valves will get hot air from the combustion chamber 8 taken. Via the fresh air supply line 24 Fresh air is added and thus the regeneration air temperature set. The mixed air is with the Blower 13 via line 22 and the open valve 23 sucked in and via the return line 17 and that open motor-controlled valve 18 in the inlet line 4 and from there via the inlet space 3, the rotary distributor 5, the corresponding segment of the distribution space 6 one Segment of the heat exchange chamber 7 supplied. That air enters the combustion chamber 8 again at the top and is heated by the burner 9. The hot air is on the paths described circulates while the rotary distributor 5 keeps spinning. Excess air in the circuit is opened by opening the motor Valves 14 discharged to the chimney 16.

    Die geschilderte Luftzirkulation wird bei laufendem Drehverteiler 5 so lange durchgeführt, bis das Wärmetauschermaterial auch in den untersten Bereichen diejenige Temperatur erreicht hat, bei welcher die Ablagerungen von dem Wärmetauschermaterial abgetragen werden. Diese Verunreinigungen werden sodann von der zirkulierenden Luft in die Verbrennungskammer 8 gebracht und dort verbrannt. Ist dieser Prozeß abgeschlossen, so werden die verschiedenen motorgesteuerten Ventile wieder in die Ausgangsposition zurückgestellt und die Zufuhr von zu reinigender Abluft über die Einlaßleitung 4 wird wieder aufgenommen.The air circulation described is ongoing Rotary distributor 5 performed until the heat exchanger material even in the lowest areas Temperature at which the deposits are removed from the heat exchanger material. These contaminants are then removed from the circulating Air is brought into the combustion chamber 8 and burned there. If this process is finished, so the various motorized valves are back returned to the starting position and the feed of exhaust air to be cleaned via the inlet line 4 is resumed.

    Claims (1)

    1. Method for thermally regenerating the heat exchanger material of a regenerative post-combustion device, which in a housing comprises from top to bottom:
      a) a combustion chamber;
      b) a section, which is divided into several segments filled with heat exchanger material;
      c) a rotary distributor, which according to its rotary position produces:
      ca) a connection between an inlet for waste gas to be purified and a first segment of the heat exchanger material;
      cb) a connection between a second segment of the heat exchanger material and an outlet for purified gas;
      cc) a connection between a third segment of the heat exchanger material, which segment is ahead of the second segment in the direction of rotation of the rotary distributor, and an inlet or outlet for flushing gas,
      in which method air is heated in the combustion chamber, is removed from this, adjusted to the desired regeneration air temperature using fresh air, and is conducted successively through all segments of the heat exchanger material, due to which the heat exchanger material is brought to a temperature at which the contaminants absorbed by the heat exchanger material are released,
      wherein
      the air used for thermal regeneration and heated in the combustion chamber (8) is removed from the combustion chamber (8) and returned to the inlet (4) for the waste gas to be purified, while the outlet (10) for purified gas is closed, and the air is circulated with the rotary distributor (5) rotating until all the heat exchanger material has been sufficiently heated and all contaminants have been released from this.
    EP00942004A 1999-06-10 2000-05-31 Method for thermally regenerating the heat exchanger material of a regenerative post-combustion device Expired - Lifetime EP1108185B1 (en)

    Applications Claiming Priority (3)

    Application Number Priority Date Filing Date Title
    DE19926405 1999-06-10
    DE19926405A DE19926405C2 (en) 1999-06-10 1999-06-10 Process for the thermal regeneration of the heat exchanger material of a regenerative afterburning device
    PCT/EP2000/004954 WO2000077453A1 (en) 1999-06-10 2000-05-31 Method for thermally regenerating the heat exchanger material of a regenerative post-combustion device

    Publications (2)

    Publication Number Publication Date
    EP1108185A1 EP1108185A1 (en) 2001-06-20
    EP1108185B1 true EP1108185B1 (en) 2004-08-11

    Family

    ID=7910748

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP00942004A Expired - Lifetime EP1108185B1 (en) 1999-06-10 2000-05-31 Method for thermally regenerating the heat exchanger material of a regenerative post-combustion device

    Country Status (7)

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    US (1) US6622780B1 (en)
    EP (1) EP1108185B1 (en)
    AT (1) ATE273483T1 (en)
    CZ (1) CZ2001458A3 (en)
    DE (2) DE19926405C2 (en)
    PL (1) PL192690B1 (en)
    WO (1) WO2000077453A1 (en)

    Families Citing this family (3)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US7018447B2 (en) * 2004-04-05 2006-03-28 Dürr Systems, Inc. Method of cleaning a rotary concentrator
    US20060068094A1 (en) * 2004-09-29 2006-03-30 Cole David J Production paint shop design
    US11391458B2 (en) * 2016-06-27 2022-07-19 Combustion Systems Company, Inc. Thermal oxidization systems and methods

    Family Cites Families (13)

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    Publication number Priority date Publication date Assignee Title
    DE2362622C2 (en) * 1973-12-17 1986-07-10 Portlandzementwerk Dotternhausen Rudolf Rohrbach Kg, 7460 Balingen Device for dedusting hot exhaust gases
    US5101741A (en) * 1991-05-10 1992-04-07 Jwp Air Technologies Flow line bake-out process for incinerator
    DE4142136C2 (en) * 1991-12-20 1994-07-21 Eisenmann Kg Maschbau Device for cleaning polluted exhaust air from industrial plants by regenerative post-combustion
    US5259757A (en) * 1992-02-27 1993-11-09 Smith Engineering Company Method and apparatus for smokeless burnout of regenerative thermal oxidizer systems
    US6183707B1 (en) * 1992-06-08 2001-02-06 Biothermica International Inc. Incineration of waste gases containing contaminant aerosols
    US5346393A (en) * 1993-02-02 1994-09-13 Smith Engineering Company Multiple-bed thermal oxidizer control damper system
    US5643539A (en) * 1994-03-04 1997-07-01 Salem Engelhard Regenerative incineration system
    EP0702195A3 (en) * 1994-08-17 1997-05-14 Grace W R & Co Annular air distributor for regenerative thermal oxidizers
    US5538420A (en) * 1994-11-21 1996-07-23 Durr Industries, Inc. Heat exchanger bake out process
    US5562442A (en) * 1994-12-27 1996-10-08 Eisenmann Corporation Regenerative thermal oxidizer
    AT402697B (en) * 1995-08-17 1997-07-25 Schedler Johannes METHOD FOR THERMALLY CLEANING REGENERATIVE POST-COMBUSTION PLANT WITHOUT EMISSIONS AND WITHOUT INTERRUPTING THE MAIN GAS FLOW
    US5810581A (en) * 1996-08-20 1998-09-22 Smith Engineering Company Pre-heating of process stream for thermal oxidizers
    US6203316B1 (en) * 1999-11-12 2001-03-20 Regenerative Environmental Equipment Co., Inc. (Reeco, Inc.) Continuous on-line smokeless bake-out process for a rotary oxidizer

    Also Published As

    Publication number Publication date
    ATE273483T1 (en) 2004-08-15
    DE50007369D1 (en) 2004-09-16
    WO2000077453A1 (en) 2000-12-21
    PL192690B1 (en) 2006-11-30
    CZ2001458A3 (en) 2002-05-15
    US6622780B1 (en) 2003-09-23
    EP1108185A1 (en) 2001-06-20
    DE19926405C2 (en) 2001-04-26
    PL345861A1 (en) 2002-01-14
    DE19926405A1 (en) 2000-12-21

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