EP0048327B1 - Soot blower arrangement - Google Patents

Soot blower arrangement Download PDF

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Publication number
EP0048327B1
EP0048327B1 EP81105940A EP81105940A EP0048327B1 EP 0048327 B1 EP0048327 B1 EP 0048327B1 EP 81105940 A EP81105940 A EP 81105940A EP 81105940 A EP81105940 A EP 81105940A EP 0048327 B1 EP0048327 B1 EP 0048327B1
Authority
EP
European Patent Office
Prior art keywords
tubes
double
soot
tube
nozzles
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Expired
Application number
EP81105940A
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German (de)
French (fr)
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EP0048327B2 (en
EP0048327A3 (en
EP0048327A2 (en
Inventor
Henryk Melcer
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.)
Sulzer AG
Original Assignee
Gebrueder Sulzer AG
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Publication date
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Application filed by Gebrueder Sulzer AG filed Critical Gebrueder Sulzer AG
Publication of EP0048327A2 publication Critical patent/EP0048327A2/en
Publication of EP0048327A3 publication Critical patent/EP0048327A3/en
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Publication of EP0048327B2 publication Critical patent/EP0048327B2/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J3/00—Removing solid residues from passages or chambers beyond the fire, e.g. from flues by soot blowers
    • F23J3/02—Cleaning furnace tubes; Cleaning flues or chimneys
    • F23J3/023—Cleaning furnace tubes; Cleaning flues or chimneys cleaning the fireside of watertubes in boilers

Definitions

  • the invention relates to a sootblower arrangement according to the preamble of claim 1.
  • a sootblower arrangement according to the preamble of claim 1.
  • Such an arrangement is known from US-A-2 840 051, according to which the nozzles of the double pipes are each directed towards a loose bundle of vertical pipes. Since these pipes partially shade each other, the cleaning effect on the pipes is very different and the soot bubble effect is therefore relatively low.
  • this object is achieved by the features of the characterizing part of claim 1.
  • a surface flow against the tube walls is achieved, the jet energy of the soot blowing medium resulting in a high cleaning effect.
  • the prismatic arrangement of the tube walls achieves the additional advantage that, in the case of very large heat exchangers, individual walls or parts thereof can be welded in the workshop by means of stationary devices and can only be joined together to form a prismatic throttle cable after they have been transported to the assembly site.
  • the consumption of high-tension soot blowing medium can be kept within a tolerable range during operation of the arrangement according to the invention, while at the same time it is avoided that secondary flows of dirty flue gas form in the inner tubes.
  • FIG. 1 shows a double tube 3 formed from an inner tube 1 and an outer tube 2 concentric with it.
  • the inner tube 1 is drilled radially at several locations (only one location is shown), and nozzles 5 are welded radially into the bores.
  • These nozzles consist of short tube sections which are tapered on both sides, with a larger cone tip angle on the inlet side facing the tube 1 and a smaller cone tip angle on the outlet side of the nozzle.
  • pipes 1 and 2 are inserted into each other and the inner pipe is wedged in the outer pipe so that it lies along a surface line. Then both tubes are drilled radially at the same time, the inner tube is removed and the nozzles 5 are welded onto it exactly radially. The inner tube 1 is then installed in the outer tube 2 such that the nozzles are aligned with the bores in the outer tube 2. Now the inner tube 1 is raised to the desired position with tools inserted behind the tubes radially to the tubes, and the welds between the nozzles 5 and the outer tube 2 are carried out thereon.
  • such double pipes 3 are installed, for example, in the wall of cooled flue gas ducts. These walls consist of parallel tubes 10 which are welded to one another via fins 11 arranged centrally between two tubes. In the plane of such welded pipes, double pipes 3 are arranged in the region of an edge between two pipe walls. The tubes 3 are rotated so that the axes of the nozzles are aligned almost parallel to the neighboring wall, which is somewhat inclined.
  • FIG. 4 shows, the nozzles of two sootblower tubes 3 lying opposite one another, which are assigned to the same wall plane, are arranged offset with respect to one another, so that the blow compartments adjoin one another.
  • the wall pipes 10 and the outer pipes 2 are, as shown in FIG. 2, connected to a distributor 20. Shortly above the distributor 20, the inner tube 1 penetrates the outer tube 2 in an arc.
  • the outer tube 2 is drawn in in the region of its lower end and is welded to the distributor 20 via an opening.
  • the wall tubes 10 adjacent to the outer tube 2 are bent out like a knee and are also welded to the distributor 20 via an opening at approximately 45 °.
  • the next wall pipes 10 alternately open straight or via a knee in the distributor 20.
  • the tubes 1 are connected via a valve 25 to a blown medium reservoir, not shown, which is charged by a compressor.
  • flue gas from the flue gas duct can be used as the blowing medium. This is expediently freed of suspended matter as far as possible before it is used as a blowing medium.
  • the walls are generally cleaned cyclically by alternately opening the valves 25 of the individual inner tubes 1 for a short time.
  • valves 25 It can be expedient to provide a small leak on the valves 25, so that - even when they are closed - the nozzles 5 are always supplied with a small amount of blowing medium. This avoids that when the valves 25 are closed, a secondary flow builds up in the sections between the nozzles of the pipes 1, through which ash and flake particles could be carried into the inner pipes 1.
  • FIG. 5 instead of a one-piece nozzle 5, a sleeve 6 with an internal thread is welded between the inner tube 1 and the outer tube 2. A replaceable nozzle 7 is screwed into the sleeve 6.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Incineration Of Waste (AREA)
  • Cleaning In General (AREA)

Description

Die Erfindung betrifft eine Russbläseranordnung nach dem Oberbegriff des Patentanspruchs 1. Eine solche Anordnung ist aus der US-A-2 840 051 bekannt, gemäss der die Düsen der Doppelrohre jeweils auf ein lockeres Bündel vertikaler Rohre gerichtet sind. Da diese Rohre sich teilweise beschatten, ist die Reinigungswirkung an den Rohren sehr unterschiedlich und daher der Russblaseeffektverhältnismässig gering.The invention relates to a sootblower arrangement according to the preamble of claim 1. Such an arrangement is known from US-A-2 840 051, according to which the nozzles of the double pipes are each directed towards a loose bundle of vertical pipes. Since these pipes partially shade each other, the cleaning effect on the pipes is very different and the soot bubble effect is therefore relatively low.

Es ist Aufgabe der Erfindung, die Russbläseranordnung mit den Merkmalen des Oberbegriffs so zu verbessern, dass sie in einem aus zusammengeschweissten Rohren gebildeten Gaszug dessen innere Oberfläche von Russ säubert.It is an object of the invention to improve the sootblower arrangement with the features of the preamble in such a way that it cleans the inner surface of soot in a gas train formed from welded pipes.

Diese Aufgabe wird erfindungsgemäss durch die Merkmale des Kennzeichens des Anspruchs 1 gelöst. Hierdurch wird eine Flächenanströmung der Rohrwände erreicht, wobei die Strahlenergie des Russblasemediums eine hohe Reinigungswirkung ergibt. Durch die prismatische Anordnung der Rohrwände wird der zusätzliche Vorteil erreicht, dass bei sehr grossen Wärmeübertragern einzelne Wände oder Teile davon in der Werkstatt mittels stationärer Einrichtungen fertiggeschweisst werden können und erst nach ihrem Transport zum Montageplatz zum prismatischen Gaszug zusammengefügt werden.According to the invention, this object is achieved by the features of the characterizing part of claim 1. In this way, a surface flow against the tube walls is achieved, the jet energy of the soot blowing medium resulting in a high cleaning effect. The prismatic arrangement of the tube walls achieves the additional advantage that, in the case of very large heat exchangers, individual walls or parts thereof can be welded in the workshop by means of stationary devices and can only be joined together to form a prismatic throttle cable after they have been transported to the assembly site.

Durch das Verfahren nach Anspruch 2 kann im Betrieb der erfindungsgemässen Anordnung der Verbrauch an hochgespanntem Russblasemedium in einem erträglichen Rahmen gehalten werden, während gleichzeitig vermieden wird, dass sich in den Innenrohren Sekundärströmungen von schmutzigem Rauchgas ausbilden.With the method according to claim 2, the consumption of high-tension soot blowing medium can be kept within a tolerable range during operation of the arrangement according to the invention, while at the same time it is avoided that secondary flows of dirty flue gas form in the inner tubes.

Aus der US-A-2 775 958 sind Doppelrohre mit Blasdüsen bekannt, die aber unter einem grossen Winkel gegen die zu reinigenden Rohrflächen gerichtet sind, was zu einem sehr schlechten Reinigungseffekt führt. Bei den Blasdüsen nach der US-A-1 930 782 wird nur ein Rohr längs einer Mantellinie vom Strahl bestrichen.From US-A-2 775 958 double pipes with blowing nozzles are known, but are directed at a large angle against the pipe surfaces to be cleaned, which leads to a very poor cleaning effect. In the blow nozzles according to US-A-1 930 782, only one tube along a surface line is swept by the jet.

Die Erfindung wird nun an Hand der Zeichnung näher erläutert.The invention will now be explained in more detail with reference to the drawing.

Es zeigen:

  • Figur 1: einen Längsschnitt durch ein erfindungsgemässes Doppelrohr im Bereich einer Düse.
  • Figur 2: einen Längsschnitt durch ein Doppelrohr im Bereich einer Anschlussstelle.
  • Figur 3: einen Grundriss durch einen quadratischen Rauchgaskanal mit vertikaler Achse.
  • Figur 4: einen Vertikalschnitt nach IV-IV in Figur 3.
  • Figur 5: einen Querschnitt durch ein Russbläserrohr im Bereich einer auswechselbaren Düse, in vergrössertem Massstab.
Show it:
  • 1 shows a longitudinal section through a double pipe according to the invention in the region of a nozzle.
  • Figure 2: a longitudinal section through a double pipe in the region of a connection point.
  • Figure 3: a floor plan through a square flue gas duct with a vertical axis.
  • Figure 4: a vertical section according to IV-IV in Figure 3.
  • Figure 5: a cross section through a sootblower tube in the area of a replaceable nozzle, on an enlarged scale.

In Figur 1 ist ein aus einem Innenrohr 1 und einem dazu konzentrischen Aussenrohr 2 gebildetes Doppelrohr 3 dargestellt.1 shows a double tube 3 formed from an inner tube 1 and an outer tube 2 concentric with it.

Das Innenrohr 1 ist an mehreren Stellen (gezeichnet ist nur eine Stelle) radial angebohrt, und in die Bohrungen sind Düsen 5 radial eingeschweisst. Diese Düsen bestehen aus kurzen Rohrabschnitten, die beidseitig konisch ausgedreht sind, mit einem grösseren Konusspitzenwinkel auf der dem Rohr 1 zugewendeten Eintrittsseite und einem kleineren Konusspitzenwinkel auf der Austrittsseite der Düse.The inner tube 1 is drilled radially at several locations (only one location is shown), and nozzles 5 are welded radially into the bores. These nozzles consist of short tube sections which are tapered on both sides, with a larger cone tip angle on the inlet side facing the tube 1 and a smaller cone tip angle on the outlet side of the nozzle.

Diese Düsen sind sodann in Bohrungen des Aussenrohres 2 dicht eingeschweisst.These nozzles are then tightly welded into bores in the outer tube 2.

Zur Fertigung des Doppelrohres werden die Rohre 1 und 2 ineinander gesteckt und das Innenrohr so im Aussenrohr verkeilt, dass es längs einer Mantellinie anliegt. Dann werden beide Rohre gleichzeitig radial gebohrt, das Innenrohr ausgebaut und die Düsen 5 daran exakt radial angeschweisst. Hernach wird das Innenrohr 1 ins Aussenrohr 2 so eingebaut, dass die Düsen mit den Bohrungen im Aussenrohr 2 fluchten. Nun wird das Innenrohr 1 mit radial zu den Rohren in die Düsen eingeführten, diese hintergreifenden Werkzeugen auf die gewünschte Position angehoben und darauf die Schweissungen zwischen den Düsen 5 und dem Aussenrohr 2 ausgeführt.To manufacture the double pipe, pipes 1 and 2 are inserted into each other and the inner pipe is wedged in the outer pipe so that it lies along a surface line. Then both tubes are drilled radially at the same time, the inner tube is removed and the nozzles 5 are welded onto it exactly radially. The inner tube 1 is then installed in the outer tube 2 such that the nozzles are aligned with the bores in the outer tube 2. Now the inner tube 1 is raised to the desired position with tools inserted behind the tubes radially to the tubes, and the welds between the nozzles 5 and the outer tube 2 are carried out thereon.

Solche Doppelrohre 3 werden erfindungsgemäss beispielsweise in die Wand von gekühlten Rauchgaskanälen eingebaut. Diese Wände bestehen aus parallelen Rohren 10, die über jeweils zentral zwischen zwei Rohren angeordneten Rippen 11 miteinander verschweisst sind. In der Ebene solcher verschweisster Rohre sind jeweils im Bereich einer Kante zwischen zwei Rohrwänden Doppelrohre 3 angeordnet. Die Rohre 3 sind dabei so gedreht, dass die Achsen der Düsen fast parallel zur Nachbarwand, dieser eher etwas zugeneigt, ausgerichtet sind.According to the invention, such double pipes 3 are installed, for example, in the wall of cooled flue gas ducts. These walls consist of parallel tubes 10 which are welded to one another via fins 11 arranged centrally between two tubes. In the plane of such welded pipes, double pipes 3 are arranged in the region of an edge between two pipe walls. The tubes 3 are rotated so that the axes of the nozzles are aligned almost parallel to the neighboring wall, which is somewhat inclined.

Wie Figur 4 zeigt, sind die Düsen zweier einander gegenüberliegender Russbläserrohre 3, die derselben Wandebene zugeordnet sind, gegeneinander versetzt angeordnet, so dass die Blas-Fächer aneinander anschliessen.As FIG. 4 shows, the nozzles of two sootblower tubes 3 lying opposite one another, which are assigned to the same wall plane, are arranged offset with respect to one another, so that the blow compartments adjoin one another.

Die Wandrohre 10 und die Aussenrohre 2 sind, wie Figur 2 zeigt, an einem Verteiler 20 angeschlossen. Kurz oberhalb des Verteilers 20 durchdringt das Innenrohr 1 das Aussenrohr 2 in einem Bogen. Das Aussenrohr 2 ist im Bereich seines unteren Endes eingezogen und über eine Öffnung des Verteilers 20 an diesem angeschweisst. Die dem Aussenrohr 2 benachbarten Wandrohre 10 sind knieartig ausgebogen und unter etwa 45° ebenfalls am Verteiler 20 über eine Öffnung angeschweisst. Die nächsten Wandrohre 10 münden abwechslungsweise gerade oder über ein Kniestück in den Verteiler 20.The wall pipes 10 and the outer pipes 2 are, as shown in FIG. 2, connected to a distributor 20. Shortly above the distributor 20, the inner tube 1 penetrates the outer tube 2 in an arc. The outer tube 2 is drawn in in the region of its lower end and is welded to the distributor 20 via an opening. The wall tubes 10 adjacent to the outer tube 2 are bent out like a knee and are also welded to the distributor 20 via an opening at approximately 45 °. The next wall pipes 10 alternately open straight or via a knee in the distributor 20.

Die Rohre 1 sind über ein Ventil 25 mit einem nicht gezeichneten Blasmediumspeicher verbunden, der von einem Kompressor aufgeladen wird.The tubes 1 are connected via a valve 25 to a blown medium reservoir, not shown, which is charged by a compressor.

Als Blasmedium kann beispielsweise Rauchgas aus dem Rauchgaskanal verwendet werden. Dieses wird zweckmässig vor seiner Verwendung als Blasmedium von Schwebestoffen möglichst weitgehend befreit.For example, flue gas from the flue gas duct can be used as the blowing medium. This is expediently freed of suspended matter as far as possible before it is used as a blowing medium.

Das Reinigen der Wände geschieht im allgemeinen zyklisch, indem abwechslungsweise die Ventile 25 der einzelnen Innenrohre 1 kurzzeitig geöffnet werden.The walls are generally cleaned cyclically by alternately opening the valves 25 of the individual inner tubes 1 for a short time.

Es kann zweckmässig sein, an den Ventilen 25 eine kleine Undichtheit vorzusehen, so dass - auch wenn sie geschlossen sind - den Düsen 5 stets eine geringe Menge Blasmedium zugeführt wird. Dadurch wird vermieden, dass sich bei geschlossenen Ventilen 25 in den Abschnitten zwischen den Düsen der Rohre 1 eine Sekundärströmung aufbaut, durch welche Asche und Schlakketeilchen in die Innenrohre 1 getragen werden könnten.It can be expedient to provide a small leak on the valves 25, so that - even when they are closed - the nozzles 5 are always supplied with a small amount of blowing medium. This avoids that when the valves 25 are closed, a secondary flow builds up in the sections between the nozzles of the pipes 1, through which ash and flake particles could be carried into the inner pipes 1.

In Figur 5 ist statt einer einstückigen Düse 5 eine Hülse 6 mit Innengewinde zwischen Innenrohr 1 und Aussenrohr 2 eingeschweisst. In die Hülse 6 ist eine auswechselbare Düse 7 eingeschraubt.In FIG. 5, instead of a one-piece nozzle 5, a sleeve 6 with an internal thread is welded between the inner tube 1 and the outer tube 2. A replaceable nozzle 7 is screwed into the sleeve 6.

Claims (2)

1. A soot blower arrangement for cleaning the surface of a number of vertical tubes which form a heat exchanger, some of the tubes being double tubes, the annular gap between the outer tube and inner tube of every double tube being connected in parallel with the interior of the other tubes, the interior of the inner tubes being connected to a supply line for a soot-blowing medium, a number of nozzles being connected laterally to the inner tubes and extending through, and being sealingly welded to, the wall of the outer tubes, characterised in that the single tubes and the double tubes are welded together by way of webs to form walls in the shape of a preferably regular prism, the double tubes are disposed near the prism edges and the nozzles of each double tube extend in a direction such that the streams of soot-blowing medium issuing from them contact that prism wall which in the region of the particular double tube concerned abuts the prism wall in which the double tube is disposed.
2. A method for operating an arrangement according to claim 1, characterised in that the inner tubes are operated alternately for brief intervals as soot-blowing tubes and in the between-blowing intervals are supplied with a greatly reduced quantity of soot-blowing medium.
EP81105940A 1980-09-19 1981-07-28 Soot blower arrangement Expired EP0048327B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH7053/80 1980-09-19
CH7053/80A CH648397A5 (en) 1980-09-19 1980-09-19 SUSSBLAESER.

Publications (4)

Publication Number Publication Date
EP0048327A2 EP0048327A2 (en) 1982-03-31
EP0048327A3 EP0048327A3 (en) 1982-09-22
EP0048327B1 true EP0048327B1 (en) 1984-01-25
EP0048327B2 EP0048327B2 (en) 1988-12-28

Family

ID=4319207

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81105940A Expired EP0048327B2 (en) 1980-09-19 1981-07-28 Soot blower arrangement

Country Status (6)

Country Link
US (1) US4456057A (en)
EP (1) EP0048327B2 (en)
JP (1) JPS5784919A (en)
CH (1) CH648397A5 (en)
DE (1) DE3162035D1 (en)
ZA (1) ZA815732B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3406893A1 (en) * 1984-02-25 1985-09-05 Deutsche Babcock Werke AG, 4200 Oberhausen CONVECTION COOLER

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3312599A1 (en) * 1983-04-08 1984-10-11 Krupp-Koppers Gmbh, 4300 Essen SUSSBLASER FOR ELIMINATING DEPOSITS IN GAS-FLOWED ROOMS, LIKE HEAT EXCHANGERS, REACTION ROOMS AND THE LIKE
CH667521A5 (en) * 1985-09-03 1988-10-14 Sulzer Ag SUSSBLAESER.
US5769035A (en) * 1996-10-24 1998-06-23 Mcdermott Technology, Inc. Boiler furnace puff sootblower
WO2010023306A2 (en) * 2008-09-01 2010-03-04 Shell Internationale Research Maatschappij B.V. Self cleaning arrangement
AU2011298482B2 (en) * 2010-08-30 2014-09-18 Air Products And Chemicals, Inc. Gasification reactor
WO2014117357A1 (en) * 2013-01-31 2014-08-07 Tenneco Automotive Operating Company Inc. Multi-lobed soot blower

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Publication number Priority date Publication date Assignee Title
US1610287A (en) * 1926-12-14 To diamond power
US1155499A (en) * 1914-06-12 1915-10-05 Diamond Power Speciality Blower unit for boilers.
US1992336A (en) * 1930-02-15 1935-02-26 Diamond Power Speciality Boiler tube cleaning apparatus
US1930782A (en) * 1931-04-16 1933-10-17 Charles S Turner Soot blower construction for superheater tubes
US2840051A (en) * 1952-12-11 1958-06-24 Babcock & Wilcox Co Convection fluid heat exchange unit with integral soot blowers
US2775958A (en) * 1953-02-24 1957-01-01 Babcock & Wilcox Co Tubular fluid heater with built-in soot blower, and method effected thereby
US3850241A (en) * 1972-07-24 1974-11-26 Chevron Res High pressure jet well cleaning
JPH043084A (en) * 1990-04-20 1992-01-08 Mita Ind Co Ltd Electrophotographic developing method
JPH075669A (en) * 1993-06-14 1995-01-10 Fuji Photo Film Co Ltd Jig for lifting container for processing liquid

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3406893A1 (en) * 1984-02-25 1985-09-05 Deutsche Babcock Werke AG, 4200 Oberhausen CONVECTION COOLER

Also Published As

Publication number Publication date
US4456057A (en) 1984-06-26
DE3162035D1 (en) 1984-03-01
JPS5784919A (en) 1982-05-27
EP0048327B2 (en) 1988-12-28
ZA815732B (en) 1982-08-25
CH648397A5 (en) 1985-03-15
EP0048327A3 (en) 1982-09-22
EP0048327A2 (en) 1982-03-31

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