EP0064092A1 - Générateur de vapeur à lit fluidisé - Google Patents

Générateur de vapeur à lit fluidisé Download PDF

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Publication number
EP0064092A1
EP0064092A1 EP81103556A EP81103556A EP0064092A1 EP 0064092 A1 EP0064092 A1 EP 0064092A1 EP 81103556 A EP81103556 A EP 81103556A EP 81103556 A EP81103556 A EP 81103556A EP 0064092 A1 EP0064092 A1 EP 0064092A1
Authority
EP
European Patent Office
Prior art keywords
tubes
steam generator
combustion chamber
generator according
legs
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
EP81103556A
Other languages
German (de)
English (en)
Other versions
EP0064092B1 (fr
Inventor
Anton Weber
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
Sulzer AG
Gebrueder Sulzer AG
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 Sulzer AG, Gebrueder Sulzer AG filed Critical Sulzer AG
Priority to AT81103556T priority Critical patent/ATE7071T1/de
Publication of EP0064092A1 publication Critical patent/EP0064092A1/fr
Application granted granted Critical
Publication of EP0064092B1 publication Critical patent/EP0064092B1/fr
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B31/00—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus
    • F22B31/0007—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus with combustion in a fluidized bed
    • F22B31/0015—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus with combustion in a fluidized bed for boilers of the water tube type
    • F22B31/003—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus with combustion in a fluidized bed for boilers of the water tube type with tubes surrounding the bed or with water tube wall partitions
    • F22B31/0038—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus with combustion in a fluidized bed for boilers of the water tube type with tubes surrounding the bed or with water tube wall partitions with tubes in the bed
    • 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
    • F22B37/20—Supporting arrangements, e.g. for securing water-tube sets
    • F22B37/202—Suspension and securing arrangements for contact heating surfaces

Definitions

  • the invention relates to a steam generator with fluidized bed combustion according to the preamble of claim 1.
  • Such a steam generator is known from EP-OS 0017 657, and the gas-conducting heating tubes arranged in the fluidized bed are designed as tube coils that are bent back and forth. It has been shown that during operation in these serpentine heater tubes, in particular when starting up and shutting down, inadmissibly high voltages which can be attributed to uneven thermal expansion can occur, which the tubes cannot withstand in the long run.
  • the vertical legs Because of their short length, the vertical legs have only a slight difference in elongation compared to the combustion chamber wall; the long horizontal legs can therefore be easily supported.
  • the vertical legs bend, although they are short, by changing the length of the long legs in a still permissible frame. Since they carry their own weight, they do not have to be supported; on the contrary, they still bear part of the weight of the horizontal legs.
  • the horizontal legs of the heater tubes are supported very simply and reliably by cooled support tubes according to claim 3.
  • Claim 5 specifies a solution in which minimal expansion differences occur between the support tubes and the combustion chamber wall.
  • Claim 6 teaches a particularly simple arrangement of T tubes, in which these tubes can form switched evaporator tubes of the steam generator in natural circulation.
  • the support tubes can be firmly connected to the horizontal legs of the heater tubes, so that no sliding friction leading to wear and tear occurs at the support points.
  • the support tubes are expediently cooled here in a forced pass. Instead of easier U -tubes could be forked in the area of the deflection, so that a downpipe would communicate with several risers. Instead of a downpipe, a slightly rising expansion loop could also be attached so that the support tubes could be drained when the steam generator was shut down.
  • a lateral buckling of the heater tubes is avoided by the features according to claim 11.
  • the vertical limbs of the heater tubes are advantageous to arrange the vertical limbs of the heater tubes according to claim 12 as an entry leg.
  • the thermal expansion of the vertical legs remains closer to the thermal expansion of the combustion chamber wall; the distance between the heater tube crowns and the adjacent support points of the horizontal legs can thereby be selected to be shorter, so that the bending stresses in the area between the respective crown and the first support of the relevant horizontal leg are reduced.
  • the lower temperature of the vertical legs allows higher bending stresses in these.
  • combustion chamber 1 has a combustion chamber 1 with a rectangular outline, which is delimited by a front wall 2, a rear wall 3 and two side walls 4 and 5.
  • the base of the combustion chamber is formed by a bottom 6.
  • the walls 2 and 3 of the combustion chamber 1 are connected gas-tight directly to walls 10 and 11 of a gas flue 14, whereas the walls 4 and 5 are gas-tightly connected to walls 12 and 13 of the gas flue via two inclined connecting wall surfaces 8 and 9, respectively.
  • the walls 2 to 5 of the combustion chamber 1, the A n gleichwand vom 8 and 9 and the walls 10 to 13 of the throttle cable 14 are formed from each other tightly welded tubes.
  • a main distributor 16 runs in the middle below the bottom 6 of the combustion chamber 1 and has two downpipes 17 and 18 from a drum 20 with water from almost saturated.
  • Auptverteilers at the ends of this H 16 is at the foot of the side walls 4 and a depending side wall connected distributor 5 22 and 23rd
  • the tubes 7 of the side walls 4 and 5 of the combustion chamber, of the connecting wall surfaces 8 and 9 and of the side walls 12 and 13 of the throttle cable 14 extend from the two side wall distributors and open into side wall collectors 27 and 28.
  • twelve curved connecting pipes 29 lead in pairs six support tube distributors 30, 30 ', 30 "located in the base 6.
  • Bottom tubes 32 are arranged between two support tube distributors 30 and between the side wall distributor 22 and 23 and the adjacent support tube distributor 30' and 30", which together and with the adjacent distributors 30 , 30 ', 30 "and 22, 23 are connected via passages 33 leaving free webs 34.
  • the bottom tubes 32 open into those tubes 7 which form the front wall 2 and the rear wall 3 of the combustion chamber. These tubes 7 sit in the walls 10 and 11 of the throttle cable and lead into a front collector 40 or rear collector 41; these two collectors are connected to the side wall collectors 27 and 28, vo n which the collector 27 is connected to the drum 20.
  • the bottom pipes 32 are each connected to the main distributor 16 via a K-piece 42 and two pipe bends 43 (FIG. 4).
  • support tubes 46 branch off from the support tube distributors 30 at equal distances from one another or from the front and rear wall 2. 3.
  • These tubes 46 lead vertically upwards and open in the gas cable 14 in support tube collectors 48, which are connected to the drum 20 via transverse collectors 49 and 50 located outside the cable 14 and two connecting lines 51.
  • the two outermost support tube distributors 30 'and 30 "lie below the connection wall surfaces 8 and 9.
  • the support tubes 46 emanating from them open, as shown in FIG. 1 on the right, in a tube 7 of the connection wall surface 9 from the top, the tubes 7 have a larger cross section than the other tubes 7 of the side walls 4, 5, 12, 13.
  • L-shaped heater tubes 52 and 53 extend in vertical planes, which originate from distributors 54 and 55 and open into collectors 56 and 57, respectively.
  • the heater tubes penetrate the connection wall surfaces 8 and 9 with their short vertical legs 58 and 59 and the side walls 5 and 4 with their long, approximately horizontal legs 60 and 61.
  • At least one of the tubes 7 of the side walls is at the penetration points 4,5 and the connecting panels 8,9 bent out of the wall level in the usual way. Appropriately welded bars ensure the tightness of the walls at the penetration points.
  • the heating tubes 52 and 53 are slidably supported at five points of its long leg 60 or 61 via U-shaped carrying loops 62 at the support pipes 46 (FIG. 3).
  • the support tubes 46 are symmetrical to their axis by carrying loops.
  • An air box 63 is provided below the combustion chamber floor 6. It consists of a trough plate 64 of rectangular outline, which is connected to the periphery of the combustion chamber base 6 in a gas-tight manner via expansion elements 65. Such an expansion element is shown for example in CH-PS 463 539.
  • the air box 63 thus formed is connected via a nozzle 67 to a combustion air source, not shown.
  • a superheater tube bundle 70 is arranged above the combustion chamber 1, the upper end of which is connected to the steam chamber of the drum 20 via a distributor 72 and two connecting lines 71 and the lower end is connected to a Friscl steam line 80 via a collector 79 is.
  • ear bundle 70 Above the superheater: ear bundle 70, there is an economizer tube bundle 74 in the throttle cable 14 provided that is connected via a distributor 75 to a feed line 76.
  • the outlet of the economiser tube bundle 74 is formed by a collector 77, which is connected via a line 78 to the water space of the drum 20.
  • a gas duct 39 leading to an air preheater (not shown) is connected to the collectors 27, 28, 40 and 41 which are arranged at the upper end of the throttle cable 14 and form a ring collector.
  • the steam generator is supplied with air via the nozzle 67 of the air box 63.
  • the air rises through the passage openings 33 provided in the combustion chamber floor 6, which can be designed, for example, according to EP-OS 0019 652, and through the fluidized layer of coal, lime and slag particles lying above. Due to the contact of the glowing coal particles and the intense turbulence of the combustion gases, a very good heat transfer is achieved on the heating pipes 52 and 53.
  • the heater tubes can therefore also contain catalytes or be coated on the inside with such.
  • the heater tubes 52 and 53 can also be connected in series instead of in parallel, e.g. the collector 56 is connected to the distributor 55.
  • feed water is fed to the steam generator via the feed line 76. This is preheated to almost evaporation temperature in the economiser tube bundle 74 and introduced into the drum 20.
  • water passes from the drum 20 into the main distributor 16 below the floor 6.
  • a first part of the water flows via the side wall distributors 22 and 23 into the pipes 7 of the side walls 4 and 5 and then arrives as Steam / water mixture via the side wall collectors 27 and 28 into the drum 20.
  • a second part of the water flows from the main manifold 16 via the pipe bends 43, the K-pieces 42 and the bottom pipes 32 into the pipes 7 of the front and rear walls 2 and 3.
  • Saturated steam from the steam chamber of the drum 20 then flows via the two connecting lines 71 into the superheater tube bundle 70, from which it reaches the live steam line 80 as superheated steam, which leads to a consumer (not shown).
  • the steam generator described can be a plant according to the EP-OS 0017 657 form part, wherein the working medium is fed as a gas turbine in the heater tubes 52 and 53, air is heated, for example, 400 ° C to 800 0 C.
  • the relatively high temperature of the air in the horizontal, long legs 60 and 61 of the heater tubes 52, 53 has the consequence that these legs expand relatively strongly during operation. They slide in the U-shaped loops 62, and it may be expedient to provide the inside of the loops 62 and / or the outside of the legs 60, 61 in the region of the sliding points with a means which prevents or reduces wear.
  • the agent can be applied, for example, by plasma spraying.
  • the vertical legs 58 and 59 of the heater tubes 52, 53 assume considerably lower temperatures than the horizontal ones Leg, because they are flowed through by colder air on the one hand and on the other hand is only partially heated by flue gas, which results in a lower heat transfer on the heating medium side. Accordingly, the vertices between the short and long legs move almost only in the horizontal direction relative to the tubes of the side walls 4, 5. Since approximately the same temperatures occur in these tubes as in the support tubes 46, the support points of the heating tubes 52, 53 remain at approximately the same height relative to the penetration points. The suspension of the heater tubes can therefore be described as ideal.
  • heating tubes 52 and 53 are supported on the support tubes 46, on both sides at the same heights, which originate from the same distributor 54 or 55 and lead into the same collector 56 or 57.
  • Five such support tubes together with twelve heater tubes 52 or 53 attached to them form a tube sheet.
  • Successive tube sheets are alternately arranged in the combustion chamber 1 such that the vertical legs 58 of the heater tubes 52 are adjacent to the side wall 4 and the vertical legs 59 of the heater tubes 53 are adjacent to the side wall 5.
  • heating pipes 52 and 53 which are supported on different sides of the same support tube 46, to the distributors 54 and 55 and the collectors 56 and 57 in such a way that the heating pipes are connected on one side to the distributor 54 and the collector 56 and the other side of the heater tubes are connected to manifold 55 and header 57; the frictional forces acting on the support tubes 46 during the expansion process are thus essentially compensated for and have an effect only in torques which are easier to control.
  • the support tubes can also 5, 6, for example, to design the support tubes as a pendulum, which means that they are fed via flexible tubes, for example via downpipes.
  • the support tubes can form simple U-tube loops or the loops can be branched; the latter is shown in FIGS. 5 and 6.
  • a down pipe 89 which carries twelve heater pipes 52 from the distributor 54, leads to a horizontal pipe 81, from which three riser pipes 83 branch off, which also each carry twelve heater pipes 52 from the distributor 54.
  • the riser pipes 83 lead into the support pipe collector 48.
  • a down pipe 85 is arranged, from which twelve heater pipes 53 are carried out of the distributor 55 and which leads to three riser pipes 87 via a horizontal pipe 86 which are each supported by twelve heater tubes 53 from the distributor 55.
  • the support tubes 89, 83 and 85, 87 can perform opposite pendulum movements corresponding to the elongations of the long legs 60 and 61, respectively. Signs of friction are thus avoided.
  • the support tube collectors 48 are arranged between the economizer tube bundle 74 and the superheater tube bundle 70, they can also — as FIG. 5 shows — be arranged in the region of the superheater or even below it. In the latter case, it may be advisable to support these low-hanging support tube collectors from a few higher support tubes from higher-hanging collectors. This support can also be done from sloping draft tubes from high points on the throttle cable walls.
  • the heater tubes 52 and 53 are attached to the support tubes 89, 83 and 85, 87 in a staggered arrangement.
  • the steam generator contains, inter alia, means for introducing the preferably granular fuel and optionally additives in order to form the fluidized bed and / or to bind pollutants, e.g. Lime to bind sulfur. It also has means for discharging and / or recirculating fuel, additives and / or recirculation products, which means are also not shown here.
  • pollutants e.g. Lime to bind sulfur.
  • discharging and / or recirculating fuel, additives and / or recirculation products which means are also not shown here.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Fluidized-Bed Combustion And Resonant Combustion (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Graft Or Block Polymers (AREA)
  • Analysing Materials By The Use Of Radiation (AREA)
  • Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
EP81103556A 1981-04-23 1981-05-09 Générateur de vapeur à lit fluidisé Expired EP0064092B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81103556T ATE7071T1 (de) 1981-04-23 1981-05-09 Dampferzeuger mit wirbelschichtfeuerung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2651/81A CH652190A5 (de) 1981-04-23 1981-04-23 Dampferzeuger mit wirbelschichtfeuerung.
CH2651/81 1981-04-23

Publications (2)

Publication Number Publication Date
EP0064092A1 true EP0064092A1 (fr) 1982-11-10
EP0064092B1 EP0064092B1 (fr) 1984-04-11

Family

ID=4238539

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81103556A Expired EP0064092B1 (fr) 1981-04-23 1981-05-09 Générateur de vapeur à lit fluidisé

Country Status (8)

Country Link
US (1) US4444154A (fr)
EP (1) EP0064092B1 (fr)
JP (1) JPS57179503A (fr)
AT (1) ATE7071T1 (fr)
CA (1) CA1190814A (fr)
CH (1) CH652190A5 (fr)
DE (1) DE3163051D1 (fr)
FI (1) FI69693C (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0157901A2 (fr) * 1984-04-11 1985-10-16 GebràœDer Sulzer Aktiengesellschaft Four à couche fluidisée
FR2761147A1 (fr) * 1997-03-24 1998-09-25 Gec Alsthom Stein Ind Echangeur de chaleur a encombrement reduit
WO2007135240A2 (fr) * 2006-05-19 2007-11-29 Foster Wheeler Energia Oy Circuit d'eau d'alimentation de chaudière dans un réacteur à lit fluidisé et réacteur à lit fluidisé
DE102011009243A1 (de) * 2011-01-24 2012-07-26 Joachim Kümmel Verfahren zur Vermeidung des Siedeverzuges in WS-Tauchheizflächen bei hohem Dampferzeuger-Betriebsdruck sowie Vorrichtung zur Durchführung des Verfahrens
US9256946B2 (en) * 2013-08-26 2016-02-09 Fu Tai Hua Industry (Shenzhen) Co., Ltd. Accuracy compensation method, system, and device
US9879853B2 (en) 2010-04-30 2018-01-30 Siemens Aktiengesellschaft Steam generator
WO2020221965A1 (fr) * 2019-04-30 2020-11-05 Cnim Groupe Module autoportant assemblé autour d'un échangeur thermique de chaudière comportant un passage horizontal, et procédé d'installation et d'entretien du passage horizontal d'une telle chaudière

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4955323A (en) * 1987-07-10 1990-09-11 Foster Wheeler Usa Corporation Fired heater
CA1313088C (fr) * 1987-09-24 1993-01-26 Walter R. Campbell Generateur de vapeur et methode d'utilisaton au moyen de circuits hydrauliques distincts et de circuits d'ecoulement gazeux combines
US4770128A (en) * 1988-04-05 1988-09-13 The Babcock & Wilcox Company Heat exchanger support
EP2182278A1 (fr) * 2008-09-09 2010-05-05 Siemens Aktiengesellschaft Générateur de vapeur en continu
CN101761923A (zh) * 2010-03-02 2010-06-30 上海锅炉厂有限公司 一种锅炉布风板

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH463539A (de) * 1966-10-05 1968-10-15 Sulzer Ag Dehnbare Verbindung zwischen zwei Rohrwänden eines Dampferzeugers
DE2039180A1 (de) * 1969-08-06 1971-02-25 Foster Wheeler Brown Boilers Mit einem fluidisierten Brennstoffbett betriebener Dampfkessel
FR2382661A1 (fr) * 1977-03-03 1978-09-29 Erk Eckrohrkessel Four a couche turbulente comportant un dispositif pour evacuer la chaleur hors de cette couche turbulente
US4184455A (en) * 1978-04-10 1980-01-22 Foster Wheeler Energy Corporation Fluidized bed heat exchanger utilizing angularly extending heat exchange tubes
GB2028985A (en) * 1978-08-23 1980-03-12 Vosper Thornycroft Ltd Improvements in and relating to boilers
EP0017657A1 (fr) * 1979-04-12 1980-10-29 GebràœDer Sulzer Aktiengesellschaft Centrale thermique combinée
EP0019652A1 (fr) * 1979-05-30 1980-12-10 GebràœDer Sulzer Aktiengesellschaft Grille pour un chauffage à lit fluidisé

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3648666A (en) * 1970-10-08 1972-03-14 Foster Wheeler Corp Steam boilers
US4183330A (en) * 1977-12-28 1980-01-15 Foster Wheeler Development Corporation Fast fluidized bed steam generator
US4314967A (en) * 1980-10-02 1982-02-09 Dorr-Oliver Incorporated Fluidized bed reactor with vertical cooling coils

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH463539A (de) * 1966-10-05 1968-10-15 Sulzer Ag Dehnbare Verbindung zwischen zwei Rohrwänden eines Dampferzeugers
DE2039180A1 (de) * 1969-08-06 1971-02-25 Foster Wheeler Brown Boilers Mit einem fluidisierten Brennstoffbett betriebener Dampfkessel
FR2382661A1 (fr) * 1977-03-03 1978-09-29 Erk Eckrohrkessel Four a couche turbulente comportant un dispositif pour evacuer la chaleur hors de cette couche turbulente
US4184455A (en) * 1978-04-10 1980-01-22 Foster Wheeler Energy Corporation Fluidized bed heat exchanger utilizing angularly extending heat exchange tubes
GB2028985A (en) * 1978-08-23 1980-03-12 Vosper Thornycroft Ltd Improvements in and relating to boilers
EP0017657A1 (fr) * 1979-04-12 1980-10-29 GebràœDer Sulzer Aktiengesellschaft Centrale thermique combinée
EP0019652A1 (fr) * 1979-05-30 1980-12-10 GebràœDer Sulzer Aktiengesellschaft Grille pour un chauffage à lit fluidisé

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0157901A2 (fr) * 1984-04-11 1985-10-16 GebràœDer Sulzer Aktiengesellschaft Four à couche fluidisée
EP0157901A3 (en) * 1984-04-11 1987-05-06 Gebruder Sulzer Aktiengesellschaft Fluidized-bed furnace
FR2761147A1 (fr) * 1997-03-24 1998-09-25 Gec Alsthom Stein Ind Echangeur de chaleur a encombrement reduit
EP0867680A1 (fr) * 1997-03-24 1998-09-30 GEC ALSTHOM Stein Industrie Echangeur de chaleur à encombrement réduit
US5855241A (en) * 1997-03-24 1999-01-05 Gec Alsthom Stein Industrie Compact heat exchanger
WO2007135240A2 (fr) * 2006-05-19 2007-11-29 Foster Wheeler Energia Oy Circuit d'eau d'alimentation de chaudière dans un réacteur à lit fluidisé et réacteur à lit fluidisé
WO2007135240A3 (fr) * 2006-05-19 2008-03-13 Foster Wheeler Energia Oy Circuit d'eau d'alimentation de chaudière dans un réacteur à lit fluidisé et réacteur à lit fluidisé
US9879853B2 (en) 2010-04-30 2018-01-30 Siemens Aktiengesellschaft Steam generator
EP2564117B1 (fr) * 2010-04-30 2018-06-06 Siemens Aktiengesellschaft Générateur de vapeur
DE102011009243A1 (de) * 2011-01-24 2012-07-26 Joachim Kümmel Verfahren zur Vermeidung des Siedeverzuges in WS-Tauchheizflächen bei hohem Dampferzeuger-Betriebsdruck sowie Vorrichtung zur Durchführung des Verfahrens
US9256946B2 (en) * 2013-08-26 2016-02-09 Fu Tai Hua Industry (Shenzhen) Co., Ltd. Accuracy compensation method, system, and device
WO2020221965A1 (fr) * 2019-04-30 2020-11-05 Cnim Groupe Module autoportant assemblé autour d'un échangeur thermique de chaudière comportant un passage horizontal, et procédé d'installation et d'entretien du passage horizontal d'une telle chaudière

Also Published As

Publication number Publication date
CA1190814A (fr) 1985-07-23
CH652190A5 (de) 1985-10-31
FI69693B (fi) 1985-11-29
JPS57179503A (en) 1982-11-05
US4444154A (en) 1984-04-24
DE3163051D1 (en) 1984-05-17
EP0064092B1 (fr) 1984-04-11
FI69693C (fi) 1986-03-10
FI820365L (fi) 1982-10-24
ATE7071T1 (de) 1984-04-15

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