DE662968C - Steam boiler heated with furnace exhaust gases - Google Patents

Steam boiler heated with furnace exhaust gases

Info

Publication number
DE662968C
DE662968C DED71718D DED0071718D DE662968C DE 662968 C DE662968 C DE 662968C DE D71718 D DED71718 D DE D71718D DE D0071718 D DED0071718 D DE D0071718D DE 662968 C DE662968 C DE 662968C
Authority
DE
Germany
Prior art keywords
exhaust gases
steam boiler
furnace exhaust
gases
boiler heated
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
DED71718D
Other languages
German (de)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Deutsche Babcock and Wilcox Dampfkesselwerke AG
Original Assignee
Deutsche Babcock and Wilcox Dampfkesselwerke AG
Publication date
Priority to DED71718D priority Critical patent/DE662968C/en
Application granted granted Critical
Publication of DE662968C publication Critical patent/DE662968C/en
Expired legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22STEAM GENERATION
    • F22BMETHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B1/00Methods of steam generation characterised by form of heating method
    • F22B1/02Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
    • F22B1/18Methods 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
    • F22B1/1869Hot gas water tube boilers not provided for in F22B1/1807 - F22B1/1861
    • F22B1/1876Hot gas water tube boilers not provided for in F22B1/1807 - F22B1/1861 the hot gas being loaded with particles, e.g. dust
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22STEAM GENERATION
    • F22BMETHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B1/00Methods of steam generation characterised by form of heating method
    • F22B1/02Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
    • F22B1/18Methods 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
    • F22B1/183Methods 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 in combination with metallurgical converter installations

Landscapes

  • 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)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Description

Mit Ofenabgasen'b#'h-";#A., 1.me Dielt r Darnpfkessel Die Abgase von öfen führen häufig Schlakkenstaub mit sich, der einen niedrigen Erweichungspunkt hat. Werden, solche Gase zur Beheizung von Dampfkesseln benutzt, so besteht die Gefahr, daß die H#eizflächen sich mit einem überzug dieser schlecht wärmeleitenden Schlacken oder Salze-Überzlehen. Es ist daher 'versucht worden, solchen Kesseln eine mit Kühlrohren ausgekleidete Strahlungskammer oder einen Körnelungsrost vorzuschalten. Bei solchen Kammern ist eine verhältnismäßig große Fläche des Mauerwerkes dem Angriff der Schlacken ausgesetzt. Besonders dort, wo der Gasstrom auf eine Zuglenkwand aufprallt, wird die Schlacke sich in das M.auerwerk einfressen und Nester bilden, welche die Rohre überbrücken. Eine feste Körnelung dieser Schlacken ist nur dann zu erzielen, wenn der Gasstrom auf eine vollständig gekühlte Fläche aufprallt. Dann werden die Schlackenteilchen fest und rieseln als Körner an dieser Wand entlang, wobei sie weiter abgekühlt werden. Wenn sie schließlich noch zwischen den Rohren eines Kölnelungsrostes hindurchfallen, können sie in dem darunterliegenden Raume angesammelt -und entfernt werden. Zugleich werden durch die Einwirkung dieser Kühlflächen an dem Strahlungsraum die Gase so stark abgekühlt, daß sie nach Durchströmen des Körnel-ungsrostes die angesammelten Schlacken nicht wieder erweichen können. Die feinen Schlackenteilchen, welche aus dem Gasstrom nicht ausgeschleudert werden, werden durch die Einwirkung des Strahlungsraumes und des Körnelungsrostes gleich den Gasen so weit abgekühlt, daß sie in dem folgenden überhitzer keine festhaftenden Ansätze mehr zu bilden vermögen.With furnace exhaust gases'b # 'h - "; # A., 1.me Dielt r Darnpfkessel The exhaust gases from Ovens often carry slag dust with them, which has a low softening point Has. If such gases are used to heat steam boilers, the There is a risk that the heating surfaces will be covered with a coating of these poorly heat-conducting surfaces Slags or salts overlaid. Attempts have therefore been made to make such kettles upstream a radiation chamber lined with cooling pipes or a grain grate. In such chambers, a relatively large area of the masonry is exposed to attack exposed to the slag. Especially where the gas flow hits a drawbar wall, the slag will eat into the masonry and form nests, which the Bridge pipes. A firm granulation of these slags can only be achieved when the gas stream impinges on a completely cooled surface. Then the Slag particles solidly and trickle down this wall as grains, whereby they be cooled further. When they finally still between the pipes of a Kölnelungsrostes fall through, they can be collected and removed in the space below will. At the same time, the action of these cooling surfaces on the radiation space the gases cooled so much that after flowing through the granulation grate they accumulated slag cannot soften again. The fine slag particles which are not ejected from the gas flow are caused by the action the radiation space and the granulation grate are cooled to the same extent as the gases that they are no longer able to form firmly adhering approaches in the following superheater.

Erfindungsgemäß wird deshalb vorgeschla-0, ungskammer "en, die Zuglenkwand der Strahl in an sich bekannter Weise mit dicht anschließenden Flossenrohren zu -versehen und diese in ihrem unteren Teil zu einern Körnelungsrost abzubiegen, der von den Ofenabgasen durchströmt wird. Damit der Querschnitt dafür frei wird, dürfen an dieser Stelle die Rohre höchstens mit Flossen in der Gasrichtung versehen oder sie müssen unberippt sein.According to the invention, therefore, the draft-guiding wall is proposed the beam closes in a manner known per se with tightly adjoining fin tubes -inadverted and to bend this in its lower part to a grain grate, the is traversed by the furnace exhaust gases. So that the cross-section is free for it, are allowed at this point the pipes are provided with fins in the gas direction or at most they must be unripped.

Die Abb. i und 2 stellen einen Längs- und Querschnitt durch eine erfindungsgemäß gebaute Dampfkesselanlage dar. Die Gase treten aus dem Kanal i in den Strahlungsraum, 2, der mit. in den Wasserkreislauf des Kessels einbezogenen Kühlwänden ausgekleidet ist. Die Seitenkühlwände sind in üblicher Weise mit Flossenrohren ausgerüstet, deren Rippen nur geringen Spalt freilassen oder einander zum Teil überdecken. Die Rückwand -3 besteht ebenfalls aus einer solchen Anordnung von Flossenrohren. Die Flossen hören am unteren Ende des lotrechten Teiles auf, die Rohre sind nach vorn abgebogen und bilden einen Körnelungsrüst, zwischen dem die Gase hindurchströmen müssen. Zur Vergrößerung der l,'-ühlflächen können sie in diesem Teil in an sich bekannter Weise mit Flossen versehen sein, welche in der Strörnungsrichtung der Gase liegen. Zur weiteren Vergrößerung der Kühlfläche ist noch eine Rohrreihe 4 parallel dazu durchgeführt, welche in die Kesseltrommel 5 mündet. In deni Raum hinter der Flossenrohrwand 3 ist der überhitzer 6angeordi-iiet. Nachdem die Gase den Strahlungsraum 2, den Körnelungsrost und den Überhitzer durchzogen haben, treten sie in das Rohrbündel des Kessels ein. Dieses besteht aus den Steilrohren 7, welche oben in die Trommel 5 und unten in schräg gestellte Teilkanunern 8 eingewalzt sind. Die Teilkammern sind schräg gestellt, damit darauf sich ablagernde Niederschläge durch öffnungen 9 und io in den Wänden hindurch abgestoßen werden können. #b Der Raum i i, in dem die unbeheizten Fallrohre liegen, ist durch Wände 12 und 13 gegen Gasdurchtritt abgeschlossen.Figs. I and 2 show a longitudinal and cross-section through a steam boiler system built according to the invention. The gases pass from the channel i into the radiation space, 2, which with. cooling walls included in the water circuit of the boiler are lined. The side cooling walls are usually equipped with fin tubes, the ribs of which leave only a small gap or partially cover one another. The rear wall -3 also consists of such an arrangement of fin tubes. The fins stop at the lower end of the vertical part, the tubes are bent forward and form a grain structure between which the gases must flow. To enlarge the cooling surfaces, they can be provided in this part in a manner known per se with fins which lie in the direction of flow of the gases. To further enlarge the cooling surface, a row of tubes 4 is carried out parallel to it, which opens into the boiler drum 5. In deni space behind the finned tube wall 3 of the superheater 6angeordi-iiet is. After the gases have passed through the radiation chamber 2, the granulation grate and the superheater, they enter the tube bundle of the boiler. This consists of the vertical tubes 7, which are rolled into the drum 5 at the top and into inclined partial ducts 8 at the bottom. The sub-chambers are inclined so that precipitates deposited thereon can be repelled through openings 9 and 10 in the walls. #b Room ii, in which the unheated downpipes are located, is closed off against gas penetration by walls 12 and 13.

Der Speisewasservorwärmer 14 hat eine ähnliche Rohra-nordnung wie der Kessel.The feedwater preheater 14 has a similar pipe arrangement as the boiler.

Claims (1)

PATENTANSPRUCII: Mit Ofenabgasen beheizter Dampfkessel mit einer Strahlungskarnmer und einem Körnelungsrost, dadurch gekennzeichnet, daß die Zuglenkwand der Strahlungskammer aus enganschließenden Flossenrohren besteht, die in ihrem unter-en Teil unberippt oder mit Flossen in der Richtung des Gasstromes versehen sind und so einen Körnelungsrost bilden, der von den Gasen durchströmt wird.PATENT CLAIM: Steam boiler heated with furnace exhaust gases with a radiation chamber and a granulation grate, characterized in that the pull-guiding wall of the radiation chamber consists of close-fitting fin tubes, the lower part of which is unaffected or are provided with fins in the direction of the gas flow and thus a grain grate form through which the gases flow.
DED71718D Steam boiler heated with furnace exhaust gases Expired DE662968C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DED71718D DE662968C (en) Steam boiler heated with furnace exhaust gases

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DED71718D DE662968C (en) Steam boiler heated with furnace exhaust gases

Publications (1)

Publication Number Publication Date
DE662968C true DE662968C (en) 1938-07-26

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ID=7060910

Family Applications (1)

Application Number Title Priority Date Filing Date
DED71718D Expired DE662968C (en) Steam boiler heated with furnace exhaust gases

Country Status (1)

Country Link
DE (1) DE662968C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1142888B (en) * 1956-03-24 1963-01-31 Voest Ag Converter waste heat boiler with cooled slag grate
DE753314C (en) * 1937-11-14 1964-02-06 Herpen Co Kg La Mont Kessel Steam generator with a contact heating surface formed from pipes

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE753314C (en) * 1937-11-14 1964-02-06 Herpen Co Kg La Mont Kessel Steam generator with a contact heating surface formed from pipes
DE1142888B (en) * 1956-03-24 1963-01-31 Voest Ag Converter waste heat boiler with cooled slag grate

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