EP0204791B1 - Feuerraumwand mit luftzuführungsdüsen, die aus zwei sich ergänzenden teilen geformt sind - Google Patents

Feuerraumwand mit luftzuführungsdüsen, die aus zwei sich ergänzenden teilen geformt sind Download PDF

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Publication number
EP0204791B1
EP0204791B1 EP86900164A EP86900164A EP0204791B1 EP 0204791 B1 EP0204791 B1 EP 0204791B1 EP 86900164 A EP86900164 A EP 86900164A EP 86900164 A EP86900164 A EP 86900164A EP 0204791 B1 EP0204791 B1 EP 0204791B1
Authority
EP
European Patent Office
Prior art keywords
wall
recesses
elements
nozzle
parts
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
EP86900164A
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English (en)
French (fr)
Other versions
EP0204791A1 (de
Inventor
André Moreau
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.)
Dalkia Wastenergy SA
Original Assignee
TIRU SA Traitement Industriel des Residus Urbains
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by TIRU SA Traitement Industriel des Residus Urbains filed Critical TIRU SA Traitement Industriel des Residus Urbains
Publication of EP0204791A1 publication Critical patent/EP0204791A1/de
Application granted granted Critical
Publication of EP0204791B1 publication Critical patent/EP0204791B1/de
Expired legal-status Critical Current

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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
    • F23M5/02—Casings; Linings; Walls characterised by the shape of the bricks or blocks used
    • 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
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L9/00—Passages or apertures for delivering secondary air for completing combustion of fuel 
    • 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

Definitions

  • the present invention relates to a hearth wall, in particular for incineration, comprising secondary air supply nozzles.
  • These walls generally contain a sheet of pipes intended to allow the heating of circulating water inside them, in order to then recover the caloric energy thus produced.
  • the nozzles, which pass through the wall, are therefore necessarily inserted between neighboring pipes to bring secondary air from a supply means into the hearth.
  • the walls are generally made of refractory materials, in particular in the form of bricks, not subject to corrosion.
  • refractory materials in particular in the form of bricks, not subject to corrosion.
  • the secondary air supply nozzles usually protrude from the internal wall of the fireplace. This has the disadvantage of subjecting the projecting part thereof to the corrosive action of the air loaded with sulphides located inside the hearth.
  • the object of the present invention is to avoid the above-mentioned drawbacks by proposing a wall for a boiler hearth, in particular for the incineration of urban waste, comprising a plurality of refractory elements in the form of bricks generally parallelepipedic with faces respectively.
  • FIGS. 1 to 5 A secondary air supply nozzle of a boiler hearth, in particular intended for the incineration of waste, and produced according to a preferred embodiment of the invention is shown in FIGS. 1 to 5.
  • a nozzle according to the invention consists of two superposed parts, one upper 11, the other lower 12. These parts are joined by a surface 17 called a joint extending longitudinally, in a substantially horizontal direction, this is that is to say normal to the lateral faces of the element 10 produced by the superposition of the upper and lower parts 11 and 12.
  • the two parts 11 and 12 are hollowed out longitudinally in a shape which allows, by joining the two parts, to form a hollow nozzle inside the element 10.
  • the recesses made in the upper and lower parts 11 and 12 are made so that the joint surface 17 is substantially median to the nozzle thus formed.
  • a front part and a rear part of the element 10 will be defined, the front part being located on the side of the mouth of the nozzle 13, the rear part being the other end, where secondary air supply means are connected. .
  • These secondary air supply means do not form an integral part of the invention and are not shown in the drawings.
  • the nozzle has on the rear side of the element 10 a first part 14 of generally cylindrical section, provided with two annular grooves 21 which surround it concentrically.
  • This part 14 is intended to receive a projection of the secondary air supply means, a projection which penetrates into the part 14 of the nozzle.
  • the projection of the supply means, the part 14 of the nozzle and the annular grooves 21 form connection means between the nozzle and the secondary air supply means.
  • the nozzle has a cylindrical intermediate part 15 with a diameter less than that of the part 14.
  • An anterior part of the nozzle 16 connects the end of the part 15 to the mouth of the nozzle 13.
  • the upper contour 20 of the part 16 shown in the longitudinal section of the figure comprises a first segment which extends linearly the upper contour of the cylindrical part 15, then substantially at the level of the middle of the part 16 curves, defining an arc of circle then extended by a last rectilinear segment extending to the mouth of the nozzle 13.
  • the inclination of the contour 20 is made downwards, which means that the longitudinal thickness of the upper part 11 of the element 10 is greater at the mouth 13 than at the junction between parts 15 and 16.
  • the lower contour 19 of the front part 16 of the nozzle rises in convergence from the junction with the part 15 towards the contour 20 to the median longitudinal level of the front part 16 where the contour 20 curves.
  • the contour 19 in this median zone of the front part 16 is also curved defining an arc of a circle which is then extended by a straight line extending towards the mouth 13 and downwards.
  • the inclination of the rectilinear segment closest to the mouth 13 of the contour 19 is less than that of the corresponding segment of the contour 20.
  • the contours 19 and 20 tend to converge, which corresponds to a narrowing of the vertical longitudinal section of the nozzle in this part.
  • the contour 19 in the front part 16 of the nozzle is substantially symmetrical with respect to a line perpendicular to the lower surface of the part 12 of the element 10 and median to the front part 16 of the nozzle.
  • the joint surface 17 extends substantially horizontally and longitudinally in a middle position at the nozzle; it curves in the front part 16 thereof, remaining substantially halfway between the two contours 19 and 20.
  • the arcuate parts of the joint surface 17 prevent longitudinal movement of one part of the element relative to the other.
  • the section of the nozzle along the joint surface 17 extends in an isosceles trapezoidal shape in the front part 16. This corresponds to a widening of the nozzle from the junction between the intermediate part 15 and the front part 16 up to the mouth 13 of this nozzle.
  • the mouth 13 of the nozzle is an opening formed coplanarly in the front face of the element 10. As shown in FIG. 4, this mouth 13 generally has the shape of a stage, that is to say: a substantially rectangular shape, the two smallest sides of which would be rounded in semicircles, as shown in FIG. 4.
  • the joint surface 17 which crosses the mouth 13 in a median manner is present on either side of said mouth two symmetrical recesses 18 of generally trapezoidal cross sections.
  • the parts 11 and 12 forming the nozzle have two lateral recesses 22 generally in the form of a portion of cylinder and extending symmetrically on either side of the longitudinal axis of the element 10 normally with respect to at the joint surface 17.
  • the front part of the element 10 located in front of the lateral recesses is of a width greater than that of the rear part located behind the recesses lateral 22.
  • the lateral recesses 22 widen one in the upper part 11, the other in the lower part 12 in a substantially half-funnel shape respectively towards the top and bottom of item 10.
  • the longitudinal recesses 18 are interrupted by the lateral recesses 22. It should be noted that in the embodiment described according to the invention tion, the longitudinal recesses 18 separated into two parts, one anterior and the other posterior by the lateral recesses, are arranged relative to the lateral edges of the element 10, so that each anterior part of a recess 18 is not in alignment with its posterior part.
  • the distance which separates each recess 18 from the nearest lateral edge remains generally constant over the entire length of the element 10.
  • a vertical hearth wall 17 for example of a waste incineration oven, consists of elements 10 and 26 made of refractory material, all of which are identical in their external dimensions .
  • a sheet of pipes 24 cylindrical and parallel to each other circulates between the elements in the recesses 22 formed therein, such pipes can advantageously allow water circulation intended to be heated by contact with the bricks.
  • a heat exchange simultaneously makes it possible to cool the wall, thus preventing it from overheating, and to heat the circulating water which thus recovers energy.
  • the sheet of pipes 24 thus formed is substantially parallel to the front face of the wall 27 of the hearth formed by all of the front faces of the elements 10 and elements 26 of identical shape and size. In practice, one, it sheet of pipes forms a metal frame for the wall of the hearth.
  • the pipes 24 are, in practice, boiler water tubes.
  • the elements 10 and the elements 26 are stacked like bricks, in adjacent successive stacks connected together by seals 25.
  • the seals 25 connect the anterior lateral surfaces of the adjacent elements 10 and 26, surfaces lying in front of the pipes 24
  • the rear width of the elements 26 or 10 being situated behind the ply of the pipes 24 being less than the previous width, the stacks of elements 10 and 26 are not laterally contiguous over their entire depth. This is not of decisive importance, the front parts serving only to hold the elements 26 and 10 in place by preventing any longitudinal displacement of each element relative to the ply of the pipes 24 which thus block it.
  • the desired number of nozzles can be introduced into the suitable locations, without creating any discontinuity in the surface of the wall of the hearth. . It is therefore possible to introduce some elements 10 in place of elements 26, in practice of bricks, and to arrange them in suitable places, this without disadvantage for the construction of the wall 27.
  • the positioning of elements 10 or 26 is done in an identical manner thanks to the flared shapes in half-funnels which the lateral recesses 22 of these elements have, which allows them to be placed first at an angle between two adjacent pipes 24, and then to put them in place by simple tilting.
  • a nozzle according to the invention is produced by simple pressing superimposed on the joint surface 17 of the lower and upper parts 12 and 11 of an element 10 according to the invention.
  • the longitudinal recesses 18 of the joint surface 17 allow precise juxtaposition in the space of the upper and lower parts 11 and 12 of the element 10. It is possible, according to a preferred embodiment of the invention, to provide recesses 18 at the joint surface 17 slightly deeper in the part comprising the re-entrant recess, the upper part in the example shown, than the protruding recesses, here from the lower part.
  • a fixing joint of cement for example.
  • Such a fixing joint enables the parts 11 and 12 of the element 10 to be fixed in a non-removable manner.
  • the element 10 thus produced becomes one piece, can be handled as such and is an integral part of the wall of the hearth, in the same way.
  • Silicon carbide is chosen as the refractory material in the preferred embodiment of the invention, but it is also possible for those skilled in the art to choose any other suitable refractory material.
  • the shape of the nozzle can be adapted to the particular needs of the embodiment chosen by a person skilled in the art, just as the means for connecting the nozzle with the means for supplying secondary air can be different.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)

Claims (6)

1. Kesselfeuerraumwand (27), insbesondere zur Müllverbrennung, mit einer Mehrzahl feuerfester Elemente (10, 26) in Form von etwa parallelepipedartigen Steinen mit Vorder-, Rück-, Unter-, Ober- und Seitenflächen, die derart aufeinandergeschichtet und seitlich zusammengefügt sind, daß ihre zum Feuerraum weisenden Vorderflächen etwa in einer gemeinsamen Ebene liegen, wobei gewisse der Elemente (10) Aussparungen aufweisen, derart, daß sie längs einer Verbindungsfläche (17) paarweise zusammengefügt eine Düse (13, 14, 15, 16) bilden, die von der Rückfläche aus zu einer Mündung (13) in der Vorderfläche verläuft, dadurch gekennzeichnet, daß die die Aussparungen aufweisenden Elemente (10) in zwei Teilstücke (11, 12) unterteilt sind, die mit der zu den Seitenflächen senkrechten Verbindungsfläche (17) aufeinanderliegen, daß weiter die Düse (13, 14, 15, 16) an ihrem hinteren Bereich für einen Anschluß an eine Sekundärverbrennungsluftzuführung angepaßt ist, und daß die Wand (27) mittels einer zur Hauptebene der Vorderseiten parallele Anordnung von vertikalen Rohren (24) bewehrt ist, die zur Aufnahme der Wärmeenergie an der Wand (27) von Wasser durchströmt sind und in etwa zylindrischen Aussparungen verlaufen, die durch in den aneinanderstoßenden Seitenflächen der Elemente (10, 26) gebildete Aussparungshälften hergestellt sind.
2. Wand nach Anspruch 1, dadurch gekennzeichnet, daß die die Wand bildenden Elemente (10, 26) aus Siliziumcarbid bestehen.
3. Wand nach einem der Ansprüche 1 und 2, dadurch gekennzeichnet, daß jede der in den Seitenflächen eines Elements (10, 26) gebildeten Hälften (22) einer zylindrischen Aussparung sich mit Bezug auf die Längsachse des Elements zur jeweils anderen symmetrisch im wesentlichen halbtrichterförmig erweitert, derart, daß ein Einsetzen zwischen zwei benachbarten Rohren (24) durch axiales Kippen möglich ist.
4. Wand nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Verbindungsfläche (17) mindestens eine Krümmung in einer zu den Seitenflächen parallelen Ebene aufweist.
5. Wand nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Verbindungsfläche (17) zwischen den beiden Teilen (11, 12) des die Aussparungen aufweisenden Elements (10) auf beiden Seiten der Aussparungen längsverlaufende Profilelemente aufweist, um die beiden Teile (11, 12) in Querrichtung formschlüssig festzulegen.
6. Wand nach Anspruch 5, dadurch gekennzeichnet, daß die längsverlaufenden Profilelemente (18) einen trapezförmigen Querschnitt haben.
EP86900164A 1984-12-17 1985-12-17 Feuerraumwand mit luftzuführungsdüsen, die aus zwei sich ergänzenden teilen geformt sind Expired EP0204791B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8419251A FR2574903B1 (fr) 1984-12-17 1984-12-17 Buse d'alimentation moulee en deux parties complementaires
FR8419251 1984-12-17

Publications (2)

Publication Number Publication Date
EP0204791A1 EP0204791A1 (de) 1986-12-17
EP0204791B1 true EP0204791B1 (de) 1989-03-15

Family

ID=9310661

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86900164A Expired EP0204791B1 (de) 1984-12-17 1985-12-17 Feuerraumwand mit luftzuführungsdüsen, die aus zwei sich ergänzenden teilen geformt sind

Country Status (7)

Country Link
US (1) US4716857A (de)
EP (1) EP0204791B1 (de)
JP (1) JPH0754176B2 (de)
CA (1) CA1252672A (de)
DE (1) DE3568857D1 (de)
FR (1) FR2574903B1 (de)
WO (1) WO1986003824A1 (de)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5180396A (en) * 1987-12-18 1993-01-19 L'oreal Process for dyeing keratinous fibres with oxidation dyes combined with indole derivatives and dyeing composition employed
US6244197B1 (en) * 1999-01-04 2001-06-12 Gary L. Coble Thermal induced cooling of industrial furnace components
US6321691B1 (en) * 1999-01-14 2001-11-27 The Babcock & Wilcox Company Oxidation resistant low alloy attachments for boiler components
US6126438A (en) * 1999-06-23 2000-10-03 American Air Liquide Preheated fuel and oxidant combustion burner
US7677007B2 (en) * 2005-05-11 2010-03-16 Parker William H Interlocking insulating firebrick
EP2011972B1 (de) * 2007-07-03 2013-07-31 clm technologie ag Anlage, Verfahren und Vorrichtung zur Erzeugung eines überhitzten Mediums
US9523505B2 (en) * 2009-01-31 2016-12-20 Landy Vent Uk Limited Combustion apparatus
EP2993397A1 (de) * 2014-09-02 2016-03-09 Linde Aktiengesellschaft Brenner mit niedrigem NOx-Austoß

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US955387A (en) * 1905-09-26 1910-04-19 Walter George Crosthwaite Furnace.
US1791244A (en) * 1928-06-18 1931-02-03 Nygaard Oscar Furnace wall
US1968934A (en) * 1928-12-10 1934-08-07 Drake Non Clinkering Furnace B Furnace
DE571636C (de) * 1929-05-31 1933-03-03 L & C Steinmueller Feuerraumrohrwand mit auswechselbarer Steinverkleidung
FR749431A (fr) * 1933-01-23 1933-07-24 Dispositif d'amenée d'air chaud à un foyer
FR809562A (fr) * 1936-08-06 1937-03-06 Dispositif applicable aux chaudières à tubes d'eau
US2139004A (en) * 1937-07-28 1938-12-06 George W Davey Furnace construction
US2532990A (en) * 1945-06-23 1950-12-05 Selas Corp Of America Burner block
US3221680A (en) * 1963-04-22 1965-12-07 Geo P Reintjes Co Inc Dryer furnace wall tile
US3589318A (en) * 1969-07-31 1971-06-29 Edwin J Szatkowski Blast furnace tuyere openings
BE793509A (fr) * 1972-01-03 1973-04-16 Didier Werke Ag Bloc refractaire pour la garnissage des foyers et des laboratoires des fours metallurgiques ou d'appareils de fusion
FR2303254A1 (fr) * 1975-03-03 1976-10-01 Usinor Brique pour garnissage refractaire et ses applications
FR2495284B1 (fr) * 1980-11-28 1985-12-06 Mediterranee Const Navales Ind Procede de protection des ecrans a faisceaux tubulaires de chambres de combustion de chaudieres, notamment d'incineration d'ordures menageres

Also Published As

Publication number Publication date
FR2574903A1 (fr) 1986-06-20
JPH0754176B2 (ja) 1995-06-07
WO1986003824A1 (fr) 1986-07-03
FR2574903B1 (fr) 1990-02-02
US4716857A (en) 1988-01-05
CA1252672A (fr) 1989-04-18
JPS62501163A (ja) 1987-05-07
DE3568857D1 (en) 1989-04-20
EP0204791A1 (de) 1986-12-17

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