EP0355706A1 - Heater wall, particularly for waste incinerators, and method of manufacturing the wall - Google Patents

Heater wall, particularly for waste incinerators, and method of manufacturing the wall Download PDF

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Publication number
EP0355706A1
EP0355706A1 EP89115170A EP89115170A EP0355706A1 EP 0355706 A1 EP0355706 A1 EP 0355706A1 EP 89115170 A EP89115170 A EP 89115170A EP 89115170 A EP89115170 A EP 89115170A EP 0355706 A1 EP0355706 A1 EP 0355706A1
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EP
European Patent Office
Prior art keywords
bricks
series
tubes
fins
auxiliary
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.)
Granted
Application number
EP89115170A
Other languages
German (de)
French (fr)
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EP0355706B1 (en
Inventor
Jean Fournier
Adrian Casariego
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.)
ALSTOM POWER BOILERS;ABB ALSTOM POWER COMBUSTION;A
Original Assignee
Stein Industrie SA
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 Stein Industrie SA filed Critical Stein Industrie SA
Priority to AT89115170T priority Critical patent/ATE86372T1/en
Publication of EP0355706A1 publication Critical patent/EP0355706A1/en
Application granted granted Critical
Publication of EP0355706B1 publication Critical patent/EP0355706B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F23M5/00—Casings; Linings; Walls
    • F23M5/08—Cooling thereof; Tube walls
    • 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
    • F27D9/00—Cooling of furnaces or of charges therein
    • F27D2009/0002—Cooling of furnaces
    • F27D2009/0018—Cooling of furnaces the cooling medium passing through a pattern of tubes
    • F27D2009/0021—Cooling of furnaces the cooling medium passing through a pattern of tubes with the parallel tube parts close to each other, e.g. a serpentine
    • F27D2009/0027—Cooling of furnaces the cooling medium passing through a pattern of tubes with the parallel tube parts close to each other, e.g. a serpentine linked by elements
    • 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
    • F27D9/00—Cooling of furnaces or of charges therein
    • F27D2009/0002—Cooling of furnaces
    • F27D2009/0051—Cooling of furnaces comprising use of studs to transfer heat or retain the liner
    • F27D2009/0054—Cooling of furnaces comprising use of studs to transfer heat or retain the liner adapted to retain formed bricks
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S122/00—Liquid heaters and vaporizers
    • Y10S122/13—Tubes - composition and protection
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4935—Heat exchanger or boiler making
    • Y10T29/49387—Boiler making

Definitions

  • a protection device of this kind comprising auxiliary fins periodically interrupted in certain vertical intervals, a first part of the bricks refractories, provided with vertical notches extending only over a fraction of their height from the bottom, being hooked on the auxiliary fins, and another part of the bricks, generally in greater number, being provided with vertical notches extending over their entire height, the latter bricks being threaded on the auxiliary fins above the bricks of the first part.
  • the object of the present invention is to provide a device for protecting boiler screens as effective as that which is the subject of the above patent application, but easier to install, more waterproof and avoiding the risks of corrosion. tubes and fins by the fumes from the oven.
  • the device according to the invention is characterized in that a second series of bricks, alternating with those of the first part, has at their upper and lower ends recesses giving them a general dovetail shape, and in that the bricks of the first series have corresponding recesses ensuring the blocking between them in position of the bricks of the second part.
  • the auxiliary fins are connected to the tubes by full penetration welds and have a width and a thickness such that their temperature is very close to that of the tubes themselves.
  • the method of manufacturing such a device according to the invention is characterized in that the tubes are placed parallel in a plane, they are joined together by means of securing fins welded between the adjacent tubes, welded on the tubes, elements of auxiliary attachment fins making an angle between 30 ° and 60 ° with the general plane of the axes of the tubes, of height corresponding to a fraction of the height of a first series of refractory bricks provided with vertical notches corresponding to the auxiliary fins and having recesses s' widening towards the side of the hearth, and at intervals corresponding to at least the height of the bricks of a second series, devoid of vertical notches, and having recesses adjusting with those of the bricks of the first series, in that the surface of the tubes, of the fastening fins and of the auxiliary fins is provided, over the height of a first lower row of bricks of the first series, with a coating of refractory cement, in that it is hung on the auxiliary fins of this first row
  • the bricks 4 and 5 are hung by notches in their lower half 2A, 3A on auxiliary fins 2 and 3 welded to the tube 1 (or 11 and 13 on the tube 14).
  • the brick 4 has an upper recess 8 and the brick 5 a lower recess 7 making it possible to hold the brick 6 in place, provided with corresponding recesses 10 and 9, these three bricks forming a dovetail assembly, and the space remaining between the recesses 7 and 9 on the one hand, 8 and 10 on the other hand being filled with a refractory cement, like that remaining between the refractory bricks and the tubes and fins.
  • Horizontal grooves such as 15 and vertical grooves such as 16 allow the establishment of seals between the bricks, in known manner.
  • Figure 2 shows the bricks in elevation.
  • the bricks of the first series such as 4 and 5 and of the second series such as 6 and 18 are placed in an alternate arrangement, a brick of the second series being above and below two bricks of the first series, and reciprocally.
  • the tubes such as 1 and 14 are placed in a plane and weld together joining fins such as 17, for example using an automatic welding machine with consumable welding wire.
  • Bricks 4 are attached to these auxiliary fins 2.
  • the tubes, the securing fins and the upper recesses 8 of the bricks 4 are then provided with the refractory cement coating.
  • Bricks of the second series are put in place such as 6, 18, which are temporarily held by the support of their lower recesses 9 on the upper recesses 7 of the bricks 4.
  • the tubes, fins are again provided with securing and upper recesses of the bricks 6, 18 with a coating of refractory cement.
  • a row of bricks from the first series 5 is hooked onto the auxiliary fins 3. The operation is again started, step by step upwards, from this row of bricks until the entire protective device for the screen.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Gasification And Melting Of Waste (AREA)
  • Incineration Of Waste (AREA)

Abstract

Device for the protection of boiler screens, in particular for garbage incinerators, and manufacturing process for this device. Device for protection of screens used for heat-recovery boilers, composed of vertical tubes 1, 14 joined together using welded ribs (17) installed between fireproof bricks and fitted with means for fastening them, these tubes being equipped with vertical auxiliary fastening ribs 2, 11; 3, 13 forming an angle of between 30 DEG and 60 DEG with the plane of the ribs 17, and made discontinuous at intervals on the vertical sections of the tubes. A first series of bricks in fastened on the upper portion of the auxiliary ribs. A second series of bricks 6, 18, alternating with the bricks of the first series, has a general dovetail shape and is fixed in position between recesses 7, 8 in the bricks of the first series. Process for the manufacture of this device.

Description

La présente invention concerne un dispositif de protection d'écrans de chaudières de récupération de chaleur, notamment pour four d'incinération d'ordures, ces écrans étant formés de tubes verticaux réunis par des ailettes de solidarisation soudées, disposés derrière des briques réfractaires et munies de moyens d'accrochage de ces briques, ces tubes étant pourvus d'ailettes auxiliaires d'accrochage verticales faisant un angle compris entre 30° et 60° avec le plan des ailettes de solidarisation, et interrompues périodi­quement sur des tronçons verticaux des tubes, une première série des briques étant munies dans leur partie inférieure d'encoches verticales de largeur et d'épaisseur correspondant à celles des ailettes auxiliaires, ne s'étendant que sur une fraction de leur hauteur à partir du bas, et étant accrochées sur la partie supérieure des ailettes auxiliaires, et un ciment réfractaire étant disposée entre les briques d'une part, les tubes et les ailettes d'autre part.The present invention relates to a device for protecting screens of heat recovery boilers, in particular for a refuse incineration oven, these screens being formed from vertical tubes joined by welded securing fins, disposed behind refractory bricks and provided means for attaching these bricks, these tubes being provided with auxiliary vertical attachment fins making an angle between 30 ° and 60 ° with the plane of the attachment fins, and periodically interrupted on vertical sections of the tubes, a first series of bricks being provided in their lower part with vertical notches of width and thickness corresponding to those of the auxiliary fins, extending only over a fraction of their height from the bottom, and being hung on the upper part auxiliary fins, and a refractory cement being placed between the bricks on the one hand, the tubes and the on the other hand.

La demanderesse a déjà proposé dans les documents FR-A-2 611 864 du 27 février 1987 ou US-A-4809 645 un dispositif de protection de ce genre, comportant des ailettes auxiliaires interrompues périodi­quement dans certains intervalles verticaux, une première partie des briques réfractaires, munies d'encoches verticales ne s'étendant que sur une fraction de leur hauteur à partir du bas, étant accrochée sur les ailettes auxiliaires, et une autre partie des briques, en général en plus grand nombre, étant munies d'encoches verticales s'étendant sur toute leur hauteur, ces dernières briques étant enfilées sur les ailettes auxiliaires au-dessus des briques de la première partie.The Applicant has already proposed in documents FR-A-2 611 864 of February 27, 1987 or US-A-4809 645 a protection device of this kind, comprising auxiliary fins periodically interrupted in certain vertical intervals, a first part of the bricks refractories, provided with vertical notches extending only over a fraction of their height from the bottom, being hooked on the auxiliary fins, and another part of the bricks, generally in greater number, being provided with vertical notches extending over their entire height, the latter bricks being threaded on the auxiliary fins above the bricks of the first part.

Quoique ce dispositif soit efficace, il présente des difficultés de mise en place et un risque de corrosion à long terme. En effet, l'intervalle subsistant entre les briques d'une part, les tubes, les ailettes de solidarisation et les ailettes auxiliaires, d'autre part, doit être rempli d'un ciment assurant un bon accrochage des briques et l'étanchéité de l'écran ainsi formé. Or, lorsque l'on fait glisser verticalement les briques munies d'encoches verticales sur toute leur hauteur sur les ailettes auxiliaires, ces briques enlèvent une partie du ciment mis en place contre les tubes et les ailettes, de sorte que la liaison entre ces briques et les tubes et ailettes est mal assurée et ne présente pas une bonne étanchéité. Les tubes et les ailettes sont dès lors soumis à un risque de corrosion et de dégradation par les fumées du four venues s'infiltrer jusqu'à leur contact.Although this device is effective, it presents difficulties of installation and a risk of corrosion in the long term. Indeed, the gap remaining between the bricks on the one hand, the tubes, the securing fins and the auxiliary fins, on the other hand, must be filled with a cement ensuring good adhesion of the bricks and the tightness of the screen thus formed. However, when the bricks with vertical notches are dragged vertically over their entire height on the auxiliary fins, these bricks remove part of the cement placed against the tubes and the fins, so that the connection between these bricks and the tubes and fins are poorly insured and do not have a good seal. The tubes and the fins are therefore subjected to a risk of corrosion and of degradation by the fumes from the oven which have come to infiltrate until they come into contact.

La présente invention a pour but de procurer un dispositif de protection d'écrans de chaudières aussi efficace que celui faisant l'objet de la demande de brevet ci-dessus, mais de mise en place plus facile, plus étanche et évitant les risques de corrosion des tubes et des ailettes par les fumées du four.The object of the present invention is to provide a device for protecting boiler screens as effective as that which is the subject of the above patent application, but easier to install, more waterproof and avoiding the risks of corrosion. tubes and fins by the fumes from the oven.

Le dipositif selon l'invention est caractérisé en ce qu'une seconde série de briques, alternant avec celles de la première partie, comporte à ses extrémités supérieure et inférieure des embrèvements leur donnant une forme générale en queue d'aronde, et en ce que les briques de la première série comportent des embrève­ments correspondants assurant le blocage entre elles en position des briques de la seconde partie.The device according to the invention is characterized in that a second series of bricks, alternating with those of the first part, has at their upper and lower ends recesses giving them a general dovetail shape, and in that the bricks of the first series have corresponding recesses ensuring the blocking between them in position of the bricks of the second part.

De préférence, les ailettes auxiliaires des tubes sont de hauteur voisine de la moitié de celle des briques de la première série.Preferably, the auxiliary fins of the tubes are of a height close to half that of the bricks of the first series.

De préférence également, les ailettes auxiliaires sont reliées aux tubes par des soudures à pleine pénétration et présentent une largeur et une épaisseur telles que leur température soit très voisine de celle des tubes eux-mêmes.Preferably also, the auxiliary fins are connected to the tubes by full penetration welds and have a width and a thickness such that their temperature is very close to that of the tubes themselves.

Les hauteurs des briques de la première et de la seconde série sont avantageusement égales.The heights of the bricks of the first and second series are advantageously equal.

Le procédé de fabrication d'un tel dispositif conformément à l'invention est caractérisé en ce que l'on dispose des tubes parallèlement dans un plan, on les réunit entre eux au moyen d'ailettes de solidarisation soudées entre les tubes adjacents, on soude sur les tubes des éléments d'ailettes auxiliaires d'accrochage faisant un angle compris entre 30° et 60° avec le plan général des axes des tubes, de hauteur correspondant à une fraction de la hauteur d'une première série de briques réfractaires munies d'encoches verticales correspondant aux ailettes auxiliaires et comportant des embrèvements s'élargissant vers le côté du foyer, et à des intervalles correspondant à au moins la hauteur des briques d'une seconde série, dépourvues d'encoches verticales, et comportant des embrèvements s'ajustant avec ceux des briques de la première série, en ce que l'on munit la surface des tubes, des ailettes de solidarisation et des ailettes auxiliaires, sur la hauteur d'une première rangée inférieure de briques de la première série, d'un enduit de ciment réfractaire, en ce que l'on accroche sur les ailettes auxiliaires de cette première rangée une rangée horizontale de briques de la première série, en ce que l'on munit la surface des tubes, des ailettes de solidarisation et de l'embrèvement supérieur des briques de la première série ainsi posées d'un enduit de ciment réfractaire, en ce que l'on place au-dessus des briques de cette première rangée une rangée horizontale de briques de la seconde série, en ce que l'on munit la surface des tubes, des ailettes de solidarisation, des ailettes auxiliaires de la rangée horizontale supérieure, et des embrèvements des briques de la seconde série ainsi posées d'un enduit de ciment réfractaire, en ce que l'on accroche sur les ailettes auxiliaires de cette rangée horizontale supérieure une autre rangée horizontale de briques de la première série, et ainsi de suite jusqu'en haut de l'écran de protection.The method of manufacturing such a device according to the invention is characterized in that the tubes are placed parallel in a plane, they are joined together by means of securing fins welded between the adjacent tubes, welded on the tubes, elements of auxiliary attachment fins making an angle between 30 ° and 60 ° with the general plane of the axes of the tubes, of height corresponding to a fraction of the height of a first series of refractory bricks provided with vertical notches corresponding to the auxiliary fins and having recesses s' widening towards the side of the hearth, and at intervals corresponding to at least the height of the bricks of a second series, devoid of vertical notches, and having recesses adjusting with those of the bricks of the first series, in that the surface of the tubes, of the fastening fins and of the auxiliary fins is provided, over the height of a first lower row of bricks of the first series, with a coating of refractory cement, in that it is hung on the auxiliary fins of this first row a horizontal row of bricks of the first series, in that one provides the surface of the tubes, the fastening fins and the removal on front of the bricks of the first series thus laid with a coating of refractory cement, in that one places above the bricks of this first row a horizontal row of bricks of the second series, in that one provides the surface of the tubes, of the fastening fins, of the auxiliary fins of the upper horizontal row, and of the recesses of the bricks of the second series thus laid down with a coating of refractory cement, in that they are hung on the auxiliary fins of this upper horizontal row another horizontal row of bricks of the first series, and so on to the top of the protective screen.

Il est décrit ci-après à titre d'exemple et en référence aux figures du dessin annexé un dispositif de protection d'écrans de chaudières selon l'invention et son procédé de fabrication.

  • La figure 1 représente l'emboîtement des briques des deux séries en coupe par un plan vertical (axe I-I des figures 2 à 4).
  • La figure 2 représente une vue en élévation d'une partie du dispositif.
  • La figure 3 représente une coupe par un plan horizontal au niveau d'une brique réfractaire de la première série (axe III-III des figures 1 et 2).
  • La figure 4 représente une coupe par un plan horizontal au niveau d'une brique réfractaire de la seconde série (axe IV-IV des figures 1 et 2).
It is described below by way of example and with reference to the figures of the accompanying drawing a device for protecting boiler screens according to the invention and its manufacturing process.
  • Figure 1 shows the interlocking of the bricks of the two series in section through a vertical plane (axis II of Figures 2 to 4).
  • Figure 2 shows an elevational view of part of the device.
  • Figure 3 shows a section through a horizontal plane at the level of a refractory brick of the first series (axis III-III of Figures 1 and 2).
  • 4 shows a section through a horizontal plane at the level of a refractory brick of the second series (axis IV-IV of Figures 1 and 2).

Dans la figure 1, on voit deux briques 4 et 5 de la première série et une brique 6 de la seconde série.In Figure 1, we see two bricks 4 and 5 of the first series and a brick 6 of the second series.

Les briques 4 et 5 sont accrochées par des encoches de leur moitié inférieure 2A, 3A sur des ailettes auxiliaires 2 et 3 soudées sur le tube 1 (ou 11 et 13 sur le tube 14). La brique 4 comporte un embrèvement supérieur 8 et la brique 5 un embrèvement inférieur 7 permettant de maintenir en place la brique 6, munie d'embrèvements correspondants 10 et 9, ces trois briques formant un assemblage en queue d'aronde, et l'espace subsistant entre les embrèvements 7 et 9 d'une part, 8 et 10 d'autre part étant rempli par un ciment réfractaire, comme celui subsistant entre les briques réfractaires et les tubes et ailettes. Des gorges horizontales telles que 15 et verticales telles que 16 permettent la mise en place de joints d'étanchéité entre les briques, de manière connue.The bricks 4 and 5 are hung by notches in their lower half 2A, 3A on auxiliary fins 2 and 3 welded to the tube 1 (or 11 and 13 on the tube 14). The brick 4 has an upper recess 8 and the brick 5 a lower recess 7 making it possible to hold the brick 6 in place, provided with corresponding recesses 10 and 9, these three bricks forming a dovetail assembly, and the space remaining between the recesses 7 and 9 on the one hand, 8 and 10 on the other hand being filled with a refractory cement, like that remaining between the refractory bricks and the tubes and fins. Horizontal grooves such as 15 and vertical grooves such as 16 allow the establishment of seals between the bricks, in known manner.

La figure 2 représente les briques en élévation. Les briques de la première série telles que 4 et 5 et de la seconde série telles que 6 et 18 sont placées selon une disposition alternée, une brique de la seconde série étant au-dessus et au-dessous de deux briques de la première série, et réciproquement.Figure 2 shows the bricks in elevation. The bricks of the first series such as 4 and 5 and of the second series such as 6 and 18 are placed in an alternate arrangement, a brick of the second series being above and below two bricks of the first series, and reciprocally.

Les figures 3 et 4 représentent les briques en coupe par des plans horizontaux (axes III-III et IV-IV respectivement des figures 1 et 2). Les tubes 1 et 14 sont réunis par une ailette de solidarisation 17, et sont munis d'ailettes auxiliaires d'accrocha­ge 3 et 13 soudées sur eux à pleine pénétration (soudures 19, 20) et faisant un angle de 45° avec le plan des axes des tubes. La largeur 1 et l'épaisseur e de ces ailettes sont telles que leur température soit sensiblement égale à celle des tubes 1, 14.Figures 3 and 4 show the bricks in section through horizontal planes (axes III-III and IV-IV respectively of Figures 1 and 2). The tubes 1 and 14 are joined by a fastening fin 17, and are provided with auxiliary attachment fins 3 and 13 welded to them at full penetration (welds 19, 20) and making an angle of 45 ° with the plane of the axes of the tubes. The width 1 and the thickness e of these fins are such that their temperature is substantially equal to that of the tubes 1, 14.

Pour mettre en place un écran, on dispose les tubes tels que 1 et 14 dans un plan et soude entre eux des ailettes de solidarisa­tion telles que 17, par exemple à l'aide d'une machine de soudage automatique à fil de soudure consommable. On soude alors sur ces tubes à des niveaux espacés de la hauteur d'une brique de la seconde série telle que 6 et d'environ la moitié d'une brique de la première série telle que 4, des ailettes auxiliaires 2, 3. On dispose sur les tubes, les ailettes de solidarisation et les ailettes auxiliaires telles que 2, sur la hauteur des briques réfractaires 4, un enduit de ciment réfractaire. On accroche sur ces ailettes auxiliaires 2 des briques 4. On munit ensuite la surface des tubes, des ailettes de solidarisation et des embrèvements supérieurs 8 des briques 4 de l'enduit de ciment réfractaire. On met en place des briques de la seconde série telles que 6, 18, qui sont maintenues provisoire­ment par l'appui de leurs embrèvements inférieurs 9 sur les embrève­ments supérieurs 7 des briques 4. On munit à nouveau la surface des tubes, des ailettes de solidarisation et les embrèvements supé­rieurs des briques 6, 18 d'un enduit de ciment réfractaire. On accroche sur les ailettes auxiliaires 3 une rangée de briques de la première série 5. On recommence à nouveau de proche en proche vers le haut l'opération à partir de cette rangée de briques jusqu'à obtenir l'ensemble du dispositif de protection de l'écran.To set up a screen, the tubes such as 1 and 14 are placed in a plane and weld together joining fins such as 17, for example using an automatic welding machine with consumable welding wire. We then weld on these tubes at levels spaced from the height of a brick of the second auxiliary fins 2, 3, such as 6 and about half of a brick of the first series such as 4, are arranged on the tubes, the securing fins and the auxiliary fins such as 2, on the height refractory bricks 4, a coating of refractory cement. Bricks 4 are attached to these auxiliary fins 2. The tubes, the securing fins and the upper recesses 8 of the bricks 4 are then provided with the refractory cement coating. Bricks of the second series are put in place such as 6, 18, which are temporarily held by the support of their lower recesses 9 on the upper recesses 7 of the bricks 4. The tubes, fins are again provided with securing and upper recesses of the bricks 6, 18 with a coating of refractory cement. A row of bricks from the first series 5 is hooked onto the auxiliary fins 3. The operation is again started, step by step upwards, from this row of bricks until the entire protective device for the screen.

Claims (5)

1/ Dispositif de protection d'écrans de chaudières de récupération de chaleur, notamment pour four d'incinération d'ordures, ces écrans étant formés de tubes verticaux (1, 14) réunis par des ailettes de solidarisation soudées (17) disposés derrière des briques réfrac­taires et munis de moyens d'accrochage de ces briques, ces tubes étant pourvus d'ailettes auxiliaires d'accrochage verticales (2, 11 ; 3, 13) faisant un angle compris entre 30° et 60° avec le plan des ailettes de solidarisation, interrompues périodiquement sur des tronçons verticaux des tubes, une première série des briques réfractaires (4, 5) étant munies dans leur partie inférieure d'encoches verticales (2A, 3A) de largeur et d'épaisseur correspondant à celles des ailettes auxiliaires, ne s'étendant que sur une fraction de leur hauteur à partir du bas, et étant accrochées sur la partie supérieure des ailettes auxiliaires, et un ciment réfractaire étant disposée entre les briques réfractaires d'une part, les tubes et les ailettes d'autre part, caractérisé en ce qu'une seconde série de briques (6, 18) alternant avec celles de la première partie, comporte à ses extrémités supérieure et inférieure des embrèvements (9, 10) leur donnant une forme générale en queue d'aronde, et en ce que les briques de la première série comportent des embrèvements correspondants (7, 8) assurant le blocage entre elles en position des briques de la seconde partie.1 / Device for protecting screens of heat recovery boilers, in particular for refuse incineration furnaces, these screens being formed from vertical tubes (1, 14) joined by welded securing fins (17) arranged behind refractory bricks and provided with means for hooking these bricks, these tubes being provided with auxiliary vertical hooking fins (2, 11; 3, 13) making an angle between 30 ° and 60 ° with the plane of the fins of joining, periodically interrupted on vertical sections of the tubes, a first series of refractory bricks (4, 5) being provided in their lower part with vertical notches (2A, 3A) of width and thickness corresponding to those of the auxiliary fins, extending only over a fraction of their height from the bottom, and being hung on the upper part of the auxiliary fins, and a refractory cement being placed between the refractory bricks areas on the one hand, the tubes and the fins on the other hand, characterized in that a second series of bricks (6, 18) alternating with those of the first part, has at its upper and lower ends recesses (9 , 10) giving them a general dovetail shape, and in that the bricks of the first series have corresponding recesses (7, 8) ensuring the blocking between them in position of the bricks of the second part. 2/ Dispositif selon la revendication 1, caractérisé en ce que les ailettes auxiliaires (2, 11 ; 3, 13) des tubes sont de hauteur voisine de la moitié de celle des briques de la première série (4, 5).2 / Device according to claim 1, characterized in that the auxiliary fins (2, 11; 3, 13) of the tubes are of a height close to half that of the bricks of the first series (4, 5). 3/ Dispositif selon les revendications 1 ou 2, caractérisé en ce que les ailettes auxiliaires sont reliées aux tubes par des soudures à pleine pénétration et présentent une largeur et une épaisseur telles que leur température soit très voisine de celle des tubes eux-mêmes.3 / Device according to claims 1 or 2, characterized in that the auxiliary fins are connected to the tubes by full penetration welds and have a width and a thickness such that their temperature is very close to that of the tubes themselves. 4/ Dispositif selon l'une des revendications 1 à 3, caractérisé en ce que les hauteurs des briques de la première et de la seconde série (4, 5 ; 6, 18) sont égales.4 / Device according to one of claims 1 to 3, characterized in that the heights of the bricks of the first and the second series (4, 5; 6, 18) are equal. 5/ Procédé de fabrication d'un dispositif de protection d'écrans de chaudière selon l'une des revendications 1 à 4, caractérisé en ce que l'on dispose des tubes (1, 14) parallèlement dans un plan, on les réunit entre eux au moyen d'ailettes de solidarisation (17) soudées entre les tubes adjacents, on soude sur les tubes des éléments d'ailettes auxiliaires d'accrochage (2, 11 ; 3, 13) faisant un angle compris entre 30° et 60° avec le plan général des axes des tubes, de hauteur correspondant à une fraction de la hauteur d'une première série de briques réfractaires (4, 5) munies d'encoches verticales correspondant aux ailettes auxiliaires et comportant des embrèvements (7, 8) s'élargissant vers le côté du foyer, et à des intervalles correspondant à au moins la hauteur des briques (6, 10) d'une seconde série, dépourvues d'encoches verticales, et comportant des embrèvements (9, 10) s'ajustant avec ceux des briques de la première série, en ce que l'on munit la surface des tubes, des ailettes de solidarisation et des ailettes auxiliaires, sur la hauteur d'une première rangée inférieure de briques de la première série, d'un enduit de ciment réfractaire, en ce que l'on accroche sur les ailettes auxiliaires de cette première rangée une rangée horizontale de briques de la première série (4) en ce que l'on munit la surface des tubes, des ailettes de solidarisation et de l'embrèvement supérieur (8) des briques de la première série ainsi posées d'un enduit de ciment réfractaire, en ce que l'on place au-dessus des briques de cette première rangée, une rangée horizontale de briques de la seconde série (6, 18), en ce que l'on munit la surface des tubes, des ailettes de solidarisation, des ailettes auxiliaires de la rangée horizontale supérieure, et des embrèvements (9) des briques de la seconde série ainsi posées d'un enduit de ciment réfractaire, en ce que l'on accroche sur les ailettes auxiliaires de cette rangée horizontale supérieure une autre rangée horizontale de briques de la première série (5), et ainsi de suite jusqu'en haut de l'écran de protection.5 / A method of manufacturing a boiler screen protection device according to one of claims 1 to 4, characterized in that there are tubes (1, 14) parallel in a plane, they are joined between them by means of fastening fins (17) welded between the adjacent tubes, is welded on the tubes of auxiliary attachment fins elements (2, 11; 3, 13) making an angle between 30 ° and 60 ° with the general plane of the axes of the tubes, of height corresponding to a fraction of the height of a first series of refractory bricks (4, 5) provided with vertical notches corresponding to the auxiliary fins and having recesses (7, 8) s 'widening towards the side of the hearth, and at intervals corresponding to at least the height of the bricks (6, 10) of a second series, devoid of vertical notches, and having recesses (9, 10) adjusting with those of the bricks of the first series, in that we equip the surface of the tubes, the attachment fins and the auxiliary fins, on the height of a first lower row of bricks of the first series, of a coating of refractory cement, in that one hangs on the auxiliary fins of this first row a horizontal row of bricks of the first series (4) in that the surface of the tubes, of the fastening fins and of the upper recess (8) of the bricks of the first series thus laid down are provided with a coated with refractory cement, in that we place above the bricks of this first row, a horizontal row of bricks of the second series (6, 18), in that we provide the surface of the tubes, securing fins, auxiliary fins of the upper horizontal row, and dimples (9) of the bricks of the second series thus laid with a coating of refractory cement, in that one hangs on the auxiliary fins of this horizontal row the upper one another horizontal row of bricks from the first series (5), and so on to the top of the protective screen.
EP89115170A 1988-08-22 1989-08-17 Heater wall, particularly for waste incinerators, and method of manufacturing the wall Expired - Lifetime EP0355706B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89115170T ATE86372T1 (en) 1988-08-22 1989-08-17 BOILER WALL, ESPECIALLY FOR WASTE INCINERATORS, AND METHOD OF MAKING SUCH WALL.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8811095 1988-08-22
FR8811095A FR2635576B1 (en) 1988-08-22 1988-08-22 DEVICE FOR PROTECTING BOILER SCREENS, PARTICULARLY FOR GARBAGE INCINERATION FURNACES, AND METHOD FOR MANUFACTURING THE SAME

Publications (2)

Publication Number Publication Date
EP0355706A1 true EP0355706A1 (en) 1990-02-28
EP0355706B1 EP0355706B1 (en) 1993-03-03

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EP89115170A Expired - Lifetime EP0355706B1 (en) 1988-08-22 1989-08-17 Heater wall, particularly for waste incinerators, and method of manufacturing the wall

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US (1) US4966100A (en)
EP (1) EP0355706B1 (en)
AT (1) ATE86372T1 (en)
BR (1) BR8904194A (en)
DE (1) DE68905110T2 (en)
DK (1) DK409589A (en)
ES (1) ES2039776T3 (en)
FR (1) FR2635576B1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995033956A1 (en) * 1994-06-02 1995-12-14 Saint-Gobain/Norton Industrial Ceramics Corporation Novel water wall tube block design
ES2083913A2 (en) * 1993-11-05 1996-04-16 Castro Juan Luis Vilar Parts for protecting the base of a boiler (generator) of a coal-fired thermal power station
DE19635292A1 (en) * 1995-09-01 1997-03-06 Mitsubishi Heavy Ind Ltd Heat resistant protective block for boiler

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE254747T1 (en) * 1997-09-30 2003-12-15 Howard Ind Pipework Services L WATER COOLED ELEMENT
EP2096354A2 (en) * 1997-11-28 2009-09-02 Mitsubishi Heavy Industries, Ltd. Heat-resistant assembly for protecting boiler tubes and method of assembling same
US6006702A (en) * 1998-06-11 1999-12-28 The Babcock & Wilcox Company Retainer shield for split ring castings
US6102694A (en) * 1998-10-01 2000-08-15 M. H. Detrick Co. Pipe refractory insulation for furnaces
JP3595479B2 (en) * 1999-12-21 2004-12-02 三菱重工業株式会社 Supports for fire-resistant structures for water pipe protection
DE102004063813A1 (en) * 2004-12-30 2006-07-13 Saint-Gobain Industriekeramik Düsseldorf Gmbh Heat protection body for a protection system for a furnace inner wall
CA2833736A1 (en) * 2011-04-22 2012-10-26 Saint-Gobain Ceramics & Plastics, Inc. System, method and apparatus having thermally conductive refractory tile
CA2797554C (en) * 2011-11-30 2018-12-11 Energy Heating Llc Mobile water heating apparatus
US9683428B2 (en) 2012-04-13 2017-06-20 Enservco Corporation System and method for providing heated water for well related activities
US9328591B2 (en) 2012-08-23 2016-05-03 Enservco Corporation Air release assembly for use with providing heated water for well related activities
US10323200B2 (en) 2016-04-12 2019-06-18 Enservco Corporation System and method for providing separation of natural gas from oil and gas well fluids

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB561814A (en) * 1942-12-22 1944-06-06 Bennis Comb Ltd Improvements relating to steam generator and other furnaces
FR2343981A1 (en) * 1976-03-13 1977-10-07 Karrena Gmbh Refractory building block for furnace cladding - having system of interlocking faces to prevent gaps on shrinkage
FR2495284A1 (en) * 1980-11-28 1982-06-04 Mediterranee Const Navales Ind Protection for boiler combustion chamber - has pipes embedded and seated in bricks forming chamber walls
FR2611864A1 (en) * 1987-02-27 1988-09-09 Stein Industrie DEVICE FOR PROTECTING BOILER SCREENS, IN PARTICULAR FOR GARBAGE INCINERATION FURNACES, AND METHOD OF MANUFACTURING THE DEVICE

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2713787A (en) * 1949-10-31 1955-07-26 Detrick M H Co Refractory wall section and method of making the same
US3838665A (en) * 1972-06-19 1974-10-01 Goetaverken Angteknik Ab Furnace wall containing spaced, parallel water tubes and blocks mounted thereon
US3828735A (en) * 1973-01-15 1974-08-13 C & H Combustion Co Boiler tube shielding wall
US3850146A (en) * 1973-01-15 1974-11-26 D Frame Boiler tube shielding wall
FR2592145B1 (en) * 1985-12-23 1989-08-18 Cometherm Sa Cie Expl Thermiqu PROCESS FOR PRODUCING REFRACTORY WALLS FOR THE PROTECTION OF OVENS OR COMBUSTION CHAMBERS AND REFRACTORY BRICK FOR IMPLEMENTING SAID METHOD.
US4809621A (en) * 1988-04-14 1989-03-07 Merkle Engineers, Inc. Refractory brick protection for membrane boiler walls

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB561814A (en) * 1942-12-22 1944-06-06 Bennis Comb Ltd Improvements relating to steam generator and other furnaces
FR2343981A1 (en) * 1976-03-13 1977-10-07 Karrena Gmbh Refractory building block for furnace cladding - having system of interlocking faces to prevent gaps on shrinkage
FR2495284A1 (en) * 1980-11-28 1982-06-04 Mediterranee Const Navales Ind Protection for boiler combustion chamber - has pipes embedded and seated in bricks forming chamber walls
FR2611864A1 (en) * 1987-02-27 1988-09-09 Stein Industrie DEVICE FOR PROTECTING BOILER SCREENS, IN PARTICULAR FOR GARBAGE INCINERATION FURNACES, AND METHOD OF MANUFACTURING THE DEVICE

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2083913A2 (en) * 1993-11-05 1996-04-16 Castro Juan Luis Vilar Parts for protecting the base of a boiler (generator) of a coal-fired thermal power station
WO1995033956A1 (en) * 1994-06-02 1995-12-14 Saint-Gobain/Norton Industrial Ceramics Corporation Novel water wall tube block design
DE19635292A1 (en) * 1995-09-01 1997-03-06 Mitsubishi Heavy Ind Ltd Heat resistant protective block for boiler
DE19635292C2 (en) * 1995-09-01 2000-03-23 Mitsubishi Heavy Ind Ltd Heat-resistant protective blocks and protective wall structure with such protective blocks for a boiler

Also Published As

Publication number Publication date
DE68905110D1 (en) 1993-04-08
EP0355706B1 (en) 1993-03-03
ATE86372T1 (en) 1993-03-15
DK409589D0 (en) 1989-08-21
FR2635576B1 (en) 1990-12-14
ES2039776T3 (en) 1993-10-01
US4966100A (en) 1990-10-30
DK409589A (en) 1990-02-23
BR8904194A (en) 1990-04-10
FR2635576A1 (en) 1990-02-23
DE68905110T2 (en) 1993-06-17

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