EP2111518B1 - Protection contre la corrosion à ventilation arrière - Google Patents

Protection contre la corrosion à ventilation arrière Download PDF

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Publication number
EP2111518B1
EP2111518B1 EP07846744.6A EP07846744A EP2111518B1 EP 2111518 B1 EP2111518 B1 EP 2111518B1 EP 07846744 A EP07846744 A EP 07846744A EP 2111518 B1 EP2111518 B1 EP 2111518B1
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EP
European Patent Office
Prior art keywords
combustion chamber
gas
corrosion protection
protection according
air
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.)
Active
Application number
EP07846744.6A
Other languages
German (de)
English (en)
Other versions
EP2111518A2 (fr
Inventor
Uwe Van Waasen
Albrecht-Ehler Nowak
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.)
SET LININGS GmbH
Original Assignee
SET LININGS GmbH
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Publication of EP2111518A2 publication Critical patent/EP2111518A2/fr
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Publication of EP2111518B1 publication Critical patent/EP2111518B1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
    • F23M5/00—Casings; Linings; Walls
    • F23M5/08—Cooling thereof; Tube walls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B37/00—Component parts or details of steam boilers
    • F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
    • F22B37/025—Devices and methods for diminishing corrosion, e.g. by preventing cooling beneath the dew point
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B37/00—Component parts or details of steam boilers
    • F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
    • F22B37/10—Water tubes; Accessories therefor
    • F22B37/107—Protection of water tubes
    • F22B37/108—Protection of water tube walls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
    • F23M5/00—Casings; Linings; Walls
    • F23M5/08—Cooling thereof; Tube walls
    • F23M5/085—Cooling thereof; Tube walls using air or other gas as the cooling medium
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/12—Casings; Linings; Walls; Roofs incorporating cooling arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
    • F23M2900/00—Special features of, or arrangements for combustion chambers
    • F23M2900/05001—Preventing corrosion by using special lining materials or other techniques

Definitions

  • the invention relates to the corrosion protection of a pipe wall by means of the pipe wall on the firing side mounted at a distance ceramic plates, wherein the gap between the pipe wall and ceramic plates can be traversed by a barrier gas stream.
  • German Utility Model 90 16 206 has proposed constantly pressurizing the interspace with external air under pressure, this pressure always being higher should lie as the one in the combustion chamber. Such additional pressure requires considerable additional technical measures, in particular a blower.
  • the US Pat. No. 1,786,593 A1 discloses a kiln whose combustion chamber is formed by a surrounding wall.
  • the kiln is operated with coal dust, which is first filled in a funnel and then injected through a feed line via a nebulizer fan into the combustion chamber.
  • the feed line has at its combustion chamber facing the end of a burner and the output of a primary or compressed air line. Furthermore, the feed line in this area is surrounded by a chamber arranged around it, through which further air can be introduced into the combustion chamber.
  • the wall facing the combustion chamber is surrounded by the outer side of the kiln by an outer shell, which is spaced from the wall to form an air space.
  • the otherwise circulating airspace is formed by individual separate air outlets.
  • Within the air space or the air outlets are arranged vertically pipes, which are each connected end to ground pipes.
  • the base tube is connected to an inlet, which is composed of a further tube with a corresponding valve. For example, water, steam or another fluid can be passed through this inlet through the base and vertical pipes.
  • the individual tubes arranged inside the air space or the air outlets have the task of cooling the kiln.
  • the air space or the air passages are flowed through with air.
  • a further blower is provided, which is connected via a pipe with an opening, wherein the opening with the air space or the air passages corresponds.
  • a positive ventilation of the air space or the air passages is now actively operated via the fan, wherein the introduced air can be introduced via a pipe connected to the air space or the air passages into the chamber in the region of the burner to be supplied to the combustion chamber.
  • a superheated hot surface will cause overheating of steam in a corrosive flue gas atmosphere.
  • a wall superheater serves within a steam generator for the combustion of domestic commercial waste to further heat the steam generated within the plant beyond its evaporation temperature to to increase the plant efficiency in the operation of a steam turbine.
  • the wall superheater is arranged outside the combustion chamber in the region of the horizontal train upstream of the boiler outlet.
  • the device as such comprises a supporting Siederohrwand of individual Siederohren 1, which are welded together by means of webs gas-tight.
  • comb plates To a flue gas-facing side of the supporting Siederohrwand towards horizontally extending to the vertical Siederohren comb plates are arranged, which are spaced apart in the vertical direction. Between the comb plates also horizontally oriented holding tubes are arranged, which are fixed by hammerhead screws on the supporting boiled-ear wall. Furthermore, rectilinearly oriented omega tubes are arranged on the holding ears, which form the flue gas facing flat surface of the wall superheater.
  • an adapted to the contour of the supporting Siederohrwand air distribution box is arranged in the region of the Wandoberhitzers between the comb plates, which has a central air inlet nozzle for purging air.
  • the supporting Siederohrwand and the air distribution box retaining tabs are further arranged, on which the hammerhead screws are screwed.
  • Both the omega tubes and the holding tubes have individual through holes through which the wall superheater can be flushed with supplied air on its side facing the flue gas.
  • the purge air itself is introduced via the rear air inlet nozzle of the air distribution box, the purge air through the supporting Siederohrwand via arranged in the webs slots and the existing for receiving the hammer head screws slots within the holding tubes is passed into the interior of the horizontal draw into it.
  • DD 438 A further discloses a kiln whose gas chamber walls have individual cooling channels.
  • To define the combustion chamber extends a lowered ceiling between the gas chamber walls, the gas chamber walls having an inlet connected to cooling channels.
  • a first group of outlet openings extends above the lowered ceiling and thus provides the space between the ceiling and the outer ceiling of the kiln with cooling air.
  • a second group of exit openings extends below the lowered ceiling and supplies the portion of the gas chamber walls which extend into the combustion chamber.
  • an adjustable opening is provided, which can provide the room above the suspended ceiling with additional fresh air. The amount of fresh air entering via this flap can be defined via this adjustable opening and regulates the temperature above the combustion chamber.
  • the object of the invention is to improve a lining of the type mentioned so that a sufficient protection of the pipe wall is achieved without having to produce an increased air pressure in the space.
  • the tubes connecting webs are provided and the inlet openings are arranged in particular as inlet nozzle in the webs, the inlet openings are provided in particular the inlet nozzle with (a) non-return valve (s) and / or a pendulum flap as a non-return valve, which / which closes / close at an overpressure arising in the combustion chamber.
  • the inlet openings are arranged in particular as inlet connection in the webs connecting the tubes.
  • the inlet openings, in particular the inlet nozzles are connected to a flow-through, in particular, regulated gas collecting system.
  • the inlet openings and / or the collection system are provided with a non-return valve (s) and / or a pendulum flap as a non-return valve / are, which close at a resulting pressure in the combustion chamber.
  • a particularly secure flow through the ceramic plate cladding from the intermediate space to the firebox, is achieved when additional outlet openings are provided in the ceramic tile cladding. It is also advantageous if the gas-permeable ceramic plate wall can be adjusted by the use of different plates and / or joint materials in their gas permeability.
  • the outlet openings are arranged above the inlet openings, so that a flow through the intermediate space is ensured from bottom to top. It is also proposed that the gas emitting into the combustion chamber has a blocking function, in particular for the noxious gas which has emanated from the combustion chamber.
  • the combustion chamber 1, for example, of a combustion furnace is delimited by tube walls 2 having a plurality of mutually parallel metallic tubes 3 which are arranged at equal intervals from each other.
  • the tubes 3 are flowed through by liquid to dissipate heat.
  • the spaces between the tubes 3 are filled by metal webs 4, which extend parallel to the tubes and are welded to the outside, so that the tubes 3 form a closed tube wall 2 with the webs 4.
  • the tubes 3 are arranged vertically.
  • the pipe wall 2 On the side facing the combustion chamber 1, the pipe wall 2 is covered by ceramic plates 5, which are fastened to the pipes and / or webs. In this case, it is ensured that the layer of ceramic plates 5 forms such a large distance with the tube wall 2 that there is a gap 6 between the ceramic plate layer and the tube wall.
  • inlet openings 7 In the webs 4 are inlet openings 7, is sucked through the outside air into the gap 6, since the pressure P1 in the furnace is always lower than the pressure P2 outside the pipe wall or the incinerator.
  • a sleeve 8 is attached to the outside of the inlet openings 7 as an inlet connection, so that the outside air sucked into the intermediate space 6 flows through the sleeve 8.
  • a check valve 9 is arranged, which can be designed as a ball valve and ensures that through the sleeve and the inlet opening 7 air can flow only in the direction of the firebox. This prevents aggressive gases from being able to penetrate into the interspace 6 when the overpressure that arises in the combustion chamber is exceeded.
  • the inlet openings 7 and in particular the sleeves 8 are connected as inlet connection to a gas collection system, whose flow is preferably controlled. Also, the gap / air gap in its width is infinitely adjustable.
  • metal armature 11 are shown, which are welded to the webs 4 and carry with their front free, in the vertical section T-shaped end of the ceramic plates 5.
  • FIG. 2 illustrated second embodiment differs from the first in that the outlet openings 10 are arranged in the region of the anchor in the plates 5 and / or between two plates 5. Alternatively, however, it is also possible for a filler to be introduced between two plates 5.
  • the inlet openings 7 are covered by an air inlet chamber 12, which is connected to an air supply 13, wherein in the chamber 12, a valve flap, in particular pendulum flap 14 controls the air supply or keeps away at an overpressure in the combustion chamber harmful gas from the air gap and boiler house.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Incineration Of Waste (AREA)
  • Furnace Details (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)

Claims (9)

  1. Protection contre la corrosion d'une paroi de tube (2) d'un foyer (1), comprenant des plaques céramiques (5) fixées à une certaine distance sur la paroi de tube (2) côté foyer, dans laquelle sont agencées dans la paroi de tube (2) des ouvertures d'admission (7), par lesquelles un gaz, en particulier de l'air extérieur, peut être aspiré dans un espace intermédiaire (6) entre la paroi de tube (2) et les plaques céramiques (5) et l'espace intermédiaire peut être parcouru par le gaz, caractérisée en ce qu'il est prévu des étais (4) raccordant les tubes (3) et les ouvertures d'admission (7) sont ménagées en particulier sous la forme de buses d'admission (8) dans les étais (4), dans laquelle les ouvertures d'admission (7), en particulier les buses d'admission (8), sont pourvues d'une ou plusieurs soupapes de non-retour (9) et/ou d'un clapet oscillant comme sécurité de non-retour, qui peut ou peuvent être fermés lors d'une surpression se produisant dans le foyer (1).
  2. Protection contre la corrosion selon la revendication 1, caractérisée en ce que les ouvertures d'admission (7), en particulier les buses d'admission (8), sont raccordées à un système collecteur de gaz parcouru, en particulier régulé.
  3. Protection contre la corrosion selon la revendication 2, caractérisée en ce que le système collecteur de gaz est pourvu d'une ou plusieurs soupapes de non-retour (9) et/ou d'un clapet oscillant comme sécurité de non-retour, qui se ferme(nt) lors d'une surpression se produisant dans le foyer (1).
  4. Protection contre la corrosion selon l'une quelconque des revendications précédentes, caractérisée en ce que le gaz parcourant l'espace intermédiaire (6) est diffusé à travers la paroi (5) des plaques céramiques jusqu'au foyer (1).
  5. Protection contre la corrosion selon l'une quelconque des revendications précédentes, caractérisée en ce que le gaz parcourant l'espace intermédiaire (6) est émis dans le foyer (1) à travers des ouvertures de décharge (10) ménagées dans la paroi (5) des plaques céramiques.
  6. Protection contre la corrosion selon l'une quelconque des revendications précédentes, caractérisée en ce que la perméabilité aux gaz de la paroi (5) des plaques céramiques perméables aux gaz peut être ajustée par l'utilisation de diverses plaques (5) et/ou de matériaux de jonction.
  7. Protection contre la corrosion selon l'une quelconque des revendications précédentes, caractérisée en ce que les ouvertures de décharge (10) sont aménagées au-dessus des ouvertures d'admission (7).
  8. Protection contre la corrosion selon l'une quelconque des revendications précédentes, caractérisée en ce que le gaz émis dans le foyer (1) présente une fonction de blocage, en particulier pour le gaz délétère se déchargeant du foyer.
  9. Protection contre la corrosion selon l'une quelconque des revendications précédentes, caractérisée en ce que la largeur de l'espace intermédiaire (6) peut être réglée, en particulier progressivement.
EP07846744.6A 2006-12-22 2007-11-22 Protection contre la corrosion à ventilation arrière Active EP2111518B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006062325A DE102006062325A1 (de) 2006-12-22 2006-12-22 Hinterlüfteter Korrosionsschutz
PCT/EP2007/010140 WO2008080457A2 (fr) 2006-12-22 2007-11-22 Protection contre la corrosion à ventilation arrière

Publications (2)

Publication Number Publication Date
EP2111518A2 EP2111518A2 (fr) 2009-10-28
EP2111518B1 true EP2111518B1 (fr) 2013-08-14

Family

ID=39465775

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07846744.6A Active EP2111518B1 (fr) 2006-12-22 2007-11-22 Protection contre la corrosion à ventilation arrière

Country Status (3)

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EP (1) EP2111518B1 (fr)
DE (1) DE102006062325A1 (fr)
WO (1) WO2008080457A2 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202009018820U1 (de) * 2009-08-31 2013-10-10 Saint-Gobain Industriekeramik Rödental GmbH Schutzsystem für eine Ofeninnenwand
DE102013103083B3 (de) * 2013-03-26 2014-05-15 Jünger+Gräter GmbH Aufnahme für Anker einer feuerfesten Innenschicht für Industrieöfen
JP6221186B2 (ja) * 2015-12-09 2017-11-01 三菱重工環境・化学エンジニアリング株式会社 水管保護用耐火物

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD438A (fr) *

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE483C (de) 1877-09-08 F. WICKE in Barmen Apparat und Verfahren zur Darstellung von krystallklarem Eis
US1786593A (en) 1927-12-13 1930-12-30 Carborundum Co Furnace
CH134558A (de) * 1928-11-22 1929-08-15 Sulzer Ag Dampfkessel.
CH559878A5 (fr) * 1972-11-30 1975-03-14 Kuenstler Hans
DE3806044A1 (de) * 1988-02-26 1989-08-31 Steinmueller Gmbh L & C Feuerraumwand
DE9016206U1 (de) 1990-11-29 1991-02-14 Jünger & Gräter GmbH & Co KG, 6830 Schwetzingen Anordnung einer feuerfesten Auskleidung mittels Stahlrohraggregate abdeckenden Platten, wobei die Platten mittels an die Rohre verbindenden Rohrflossen angeschweißten Halterungen fixiert sind
DE10257305A1 (de) 2002-12-07 2004-06-17 Kümmel, Joachim, Dipl.-Ing. Verfahren und Vorrichtung zum Überhitzen von Dampf in korrosiver Rauchgasatmosphäre

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD438A (fr) *

Also Published As

Publication number Publication date
WO2008080457A3 (fr) 2011-05-26
WO2008080457A2 (fr) 2008-07-10
DE102006062325A1 (de) 2008-07-03
EP2111518A2 (fr) 2009-10-28

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