EP2297517B1 - Paroi-membrane d'une chaudière à vapeur industrielle - Google Patents

Paroi-membrane d'une chaudière à vapeur industrielle Download PDF

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Publication number
EP2297517B1
EP2297517B1 EP09772046.0A EP09772046A EP2297517B1 EP 2297517 B1 EP2297517 B1 EP 2297517B1 EP 09772046 A EP09772046 A EP 09772046A EP 2297517 B1 EP2297517 B1 EP 2297517B1
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EP
European Patent Office
Prior art keywords
tube
web
region
sub
finned
Prior art date
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Revoked
Application number
EP09772046.0A
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German (de)
English (en)
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EP2297517A2 (fr
Inventor
Martin Becker
Ralf-Udo Husemann
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Mitsubishi Power Europe GmbH
Original Assignee
Mitsubishi Hitachi Power Systems Europe GmbH
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Application filed by Mitsubishi Hitachi Power Systems Europe GmbH filed Critical Mitsubishi Hitachi Power Systems Europe GmbH
Priority to RS20160627A priority Critical patent/RS55108B1/sr
Priority to HRP20161007TT priority patent/HRP20161007T1/hr
Priority to MEP-2016-179A priority patent/ME02471B/me
Publication of EP2297517A2 publication Critical patent/EP2297517A2/fr
Application granted granted Critical
Publication of EP2297517B1 publication Critical patent/EP2297517B1/fr
Revoked legal-status Critical Current
Anticipated expiration legal-status Critical

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B21/00—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically
    • 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
    • F22B37/04—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler and characterised by material, e.g. use of special steel alloy

Definitions

  • the invention is directed to a diaphragm wall of a large steam generator comprising a plurality of pipe-web-pipe connections and / or fin pipe connections, wherein the respective tubes of the pipe-web-pipe connection or the fin pipes of the fin pipe connection of a steel material with ferritic-bainitic , martensitic or austenitic microstructure or a nickel-based alloy, and the pipe connecting web of the pipe-web-pipe connection or the fin joint wholly or in combination of a steel material with ferritic-bainitic, martensitic or austenitic structure or a nickel-based alloy.
  • Such a membrane wall is eg in US 5 092 278 disclosed.
  • Suitable materials for the manufacture of membrane walls are considered to be nickel-base alloys and 9-12 wt% chromium-containing martensite steels.
  • nickel-based alloys are significantly more expensive than the austenitic materials used hitherto in power plant construction and are priced by 5 to 8 times more expensive than the usual austenitic materials.
  • the cost of nickel-based power plant components is higher than that of austenitic materials.
  • Alternate chromium-containing (9-12 wt.%) Martensitic materials must necessarily undergo heat treatment when creating a membrane wall due to the welds associated therewith, causing problems in the fabrication and assembly of membrane walls of these materials.
  • the existing of such martensitic material components must be preheated and after each welding process the membrane membrane element taken as a whole or the heat affected zone of the weld must be annealed at about 700 ° C to reduce the hardness.
  • these martensitic steel materials with low chromium content increased oxide growth on the inside of the pipe, which may have increased pipe wall temperatures and possibly blockages of the pipes by chipped oxide during operation of the power plant result.
  • the invention is therefore based on the object to provide a solution that enables the production of a suitable for use in a 700 ° C power plant membrane wall cost-effectively with substantially constant technical manufacturing effort.
  • the membrane wall described at the outset is characterized in that the membrane wall at least partially has regions in which different steel materials and / or nickel-base alloys are connected to one another as a respective web or tube material or as a respective fin tube material.
  • the invention is therefore based on the idea that not all areas of a membrane wall must be completely formed with material that withstands the respective steam parameters. For example, it is possible to make the tubes of the respective membrane wall regions or sections of a nickel-based alloy material, but to connect the adjacent tubes with a web of less expensive austenitic or possibly also of martensitic material. In particular, however, this makes it possible, in part, to use cost-effective martensitic materials partly for the media-carrying pipes as well as the "austenitic" nickel-base alloys and, in particular, to connect contiguous membrane wall part segments to a web and / or tube of austenitic nickel-base alloy material.
  • a web or tube made of austenitic material ie a material with an austenitic microstructure, in particular an austenitic nickel-based alloy, is then welded to the respective tubes and / or webs of martensitic material, ie of a material having a martensitic microstructure.
  • a corresponding web or a corresponding tube of an adjacent membrane wall segment segment is then welded to the site, which also consist of a nickel-based alloy with austenitic microstructure and at its opposite end, in turn, a tube or a web is welded, which optionally also from consist of a nickel-based alloy material with austenitic structure or in turn of a steel material with a martensitic microstructure.
  • the weld seam joining the adjoining webs or tubes of the two membrane wall part segments does not then need to be heat treated. Due to the web or pipe of nickel-based alloy upstream of the pipes or webs with martensitic microstructure, the pipe or the web with martensitic microstructure remains without heat-affected zone and no heat treatment is necessary.
  • the areas with different materials are connected to each other with a welded joint, so that the invention provides in an embodiment that the contiguous and interconnected areas of each different web or pipe material or Flossenrohrtechnikstoff are interconnected by means of a welded joint.
  • the mechanical loading of the diaphragm wall if the different web or tube materials or fin materials have a similar coefficient of thermal expansion which deviates from one another by a maximum of ⁇ 20%. Due to the similar thermal expansion ensures that no unwanted, exceptionally high tension forces in the diaphragm wall during operation of the steam generator occur.
  • the invention is characterized in an embodiment further characterized in that extends a web portion of a pipe-web-pipe connection or a fin pipe connection only over a portion of the web control width.
  • this can be the combination of a tube with martensitic microstructure welded thereto web area of nickel-based alloy material with austenitic microstructure by welding the latter to the pipe in the assembly workshop, the web then only has the example half the width of the later realized on the steam generator web.
  • the web rule width is understood to mean the total web width connecting two pipes each at the finished membrane wall of the large steam generator.
  • the membrane wall In combination of all possible sub-areas of the membrane wall, this will then have in their finished operating configuration of the steam generator both adjoining areas of the same materials, especially those with the same microstructure, but also adjacent areas of different material, especially those with different microstructure.
  • the invention is therefore characterized in an embodiment in that the membrane wall adjacent areas with pipe-web-pipe connections or fin pipe connections made of different materials and adjoining areas with pipe-web-pipe connections or fin pipe connections of the same, in particular geglage Modell SharePointen, materials.
  • the membrane wall according to the invention is further characterized in that the membrane wall partially, especially in the discharge section of the large steam generator (preferably to a range in which the respective tube operating material limit temperature of about up to 550 ° C) consists of pipe-web-pipe connections or fin pipe connections, in which web and pipe or fin tube each consist of a steel material with ferritic-bainitic structure, in particular 7CrMoVTiB10-10 or T24 exist.
  • the membrane wall can be positioned in regions, in particular in a first evaporator section of the large steam generator above the discharge section (in which the respective tube can withstand an operating material limit temperature in a range from approximately equal to 550 ° C. to approximately equal to 600 ° C.) consists of pipe-web-pipe connections or fin pipe connections, in which web and pipe or fin tube each consist of a martensitic steel material, in particular of VM12 or T92 or X10CrWMoVNb9-2 exist.
  • the membrane wall of individual membrane wall segments or membrane wall part segments is composed, which consist in their very substantial part of pipe-web-pipe connections or fin pipe connections, the are made of a steel material with martensitic structure, in particular of VM12 or T92.
  • these membrane wall part segments can be provided in the workshop at their top and / or bottom and / or at each of their longitudinal sides with a land area or a pipe and / or or pipe and web pieces of austenitic material, in particular of a nickel-based alloy material.
  • the invention therefore further provides that the membrane wall, in particular in the first evaporator section, at least partially tube-web-pipe connections, each having at least one tube of martensitic structure, in particular of VM12 or T92, with welded web or welded fin of a Nickel-based alloy, preferably with an austenitic microstructure, in particular A617 or HR6W.
  • the web consists of a material with austenitic microstructure and the adjacent tube of a material with a martensitic microstructure. Rather, it is also possible that on the outside a tube austenitic microstructure forms the conclusion to which a web was welded with martensitic microstructure in the workshop.
  • the membrane wall, in particular in the first evaporator section, at least Pipe-web-pipe connections comprises, each comprising a web of martensitic structure, in particular of VM12 or T92, with welded tube of a nickel-based alloy, preferably austenitic microstructure, in particular A617 or HR6W.
  • the areas of welded webs or fins or tubes of nickel-base alloy are formed on the longitudinal sides of a membrane wall part segment consisting essentially of steel material with a martensitic structure, in particular VM12 or T92.
  • the invention provides for butting in the vertical direction of superimposed membrane wall segments that the membrane wall, in particular in the first evaporator section, at least partially consists of pipe-web-pipe connections or fin pipe connections, in which Pipe web-pipe sections or fin pipe sections of a material with a martensitic structure, in particular of VM12 or T92, pipe sections or fin pipe sections and / or web sections of a nickel-based alloy, preferably austenitic structure, in particular A617 or HR6W welded.
  • the regions of welded tube sections or fin tube sections and / or web sections along the top and / or bottom of a membrane wall segment segment are formed from a martensitic structure, in particular from VM12 or T92.
  • Membrane walls can be constructed and manufactured in a particularly cost-effective manner if this is made up of individual membrane wall part segments which are produced in the workshop and then welded together at the construction site.
  • the invention is further characterized by a substantially consisting of a steel material with a martensitic microstructure membrane wall part segment having welded along its top and bottom tube sections and / or web sections or fin tube sections and along its longitudinal sides welded bar or fin areas or tubes made of nickel-based alloy material.
  • Such an advantageous embodiment may also have more than one element of nickel-based alloy material, in particular on the longitudinal sides of a membrane wall part segment.
  • the invention is therefore further characterized by the fact that the nickel-base alloy material pipe and / or sections or regions of the membrane wall or membrane wall part segments comprising nickel-based alloy material comprise a plurality of pipes and / or webs.
  • the membrane wall partially, in particular in a second evaporator section of the large steam generator (in which the respective pipe a Radiogrenztemperatur in a range of about equal to 600 ° C to about equal to 620 ° C withstand) from pipe web Pipe connections or fin pipe connections exist which web and tube or fin tube each consist of a nickel-based alloy with an austenitic microstructure, in particular A617 or HR6W.
  • HR6W refers to a steel coming from Japan, which is designated there with this Japanese nomenclature.
  • the membrane wall in particular in the transition region from the first evaporator subregion to the second evaporator subregion, at least partially from a membrane wall part segment of a steel material with a martensitic microstructure, in particular of VM12 or T92 welded portion or portion of nickel-based alloy, preferably austenitic microstructure, in particular A617 or HR6W exists.
  • the invention provides that the membrane wall partially, in particular in a first portion of the large steam generator with vertical bore (in which the respective tube operating material limit temperature in the range of about equal to 620 ° C to about equal to 600 ° C) consists of pipe-web-pipe connections or fin pipe connections, in which web and pipe or fin tube each consist of a nickel-based alloy, preferably austenitic microstructure, in particular A617 or HR6W exist.
  • the invention provides for in the membrane wall in turn vertically arranged above further areas that the Membrane wall partially, in particular in a second portion of the large steam generator with vertical bore, preferably in the superheater (in which the respective pipe withstands a Radiomaterialgrenztemperatur in the range of about equal to 600 ° C) at least partially consists of pipe-web-pipe connections or fin pipe connections, each comprising at least one tube made of a nickel-based alloy, in particular A617, with welded web made of a different nickel-based alloy, in particular HR6W, wherein both materials preferably have an austenitic microstructure.
  • a vertical direction of the finished membrane wall of the large steam generator last and highest range that the membrane wall partially, in particular in a third portion of the large steam generator (in which the respective pipe withstands a Radiogrenztemperatur of up to about 550 ° C) at least partially consists of pipe-web-pipe connections or fin pipe connections, in which web and adjoining pipe or adjoining fin pipes each consist of a steel material with ferrite-bainitic microstructure, in particular from 7CrMoVTiB10-10 exist.
  • the invention further provides that in the discharge section and / or in the first evaporator section and / or in the second evaporator section and / or in the first subarea with vertical guidance and / or in the second subarea with vertical guidance and / or or in the third section of the large steam generator each pipe-web-pipe connections or fin pipe connections are formed, in which a web and an adjoining pipe or two adjoining web portions of the pipe-web-pipe connection or two adjacent fin pipes of the fin pipe connection made of different steel material and / or different nickel-based alloy and / or are welded together from materials with different microstructure.
  • each pipe web are formed pipe connections or fin pipe connections, in which a web and an adjoining pipe or two adjacent web portions of the pipe-web-pipe connection or two adjacent fin pipe of the fin pipe connection of the same steel material and / or the same nickel-based alloy and / or materials with the same microstructure are welded together.
  • the invention is also characterized by the fact that in each case at least one of the evaporator subregions and the subareas with Vertikalberohrung tube webbridge Connections or fin pipe connections are formed, in which a web and an adjoining pipe or two adjacent web portions of the pipe-web-pipe connection or two adjacent fin pipes of the Flossenrohritati although in each case different steel material and / or different nickel-based alloy, but are welded together with the same or similar microstructure.
  • the membrane wall composed of different partial regions also has transition regions from one partial region to another vertically arranged above the other partial region.
  • the invention initially provides that in the transition region from the discharge section to the first evaporator section and / or in the transition region from the first evaporator section to the second evaporator section and / or in the transition region from the second evaporator section to the first section with vertical contact and / or in the transition section from the first section
  • Subarea with vertical contact to the second subarea with vertical contact and / or in the transitional area from the second subarea with vertical contact to the third subarea of the large steam generator pipe-web-pipe connections or fin pipe connections are formed, in which in each case a web and / or a pipe of a subarea with a adjoining web and / or pipe of another sub-area made of different steel material and / or different nickel-based alloy and / or materials with different microstructure with each other are welded.
  • pipe-web-pipe connections or fin pipe connections are formed in the transition region from the second evaporator subregion to the first subregion with vertical contact and / or in the transition region from the first subregion with vertical contact to the second subregion with vertical contact which in each case a bridge and / or a Tube of a sub-area with an adjacent web and / or tube of another portion of the same steel material and / or the same nickel-based alloy and / or are welded together from a material having the same microstructure.
  • the invention finally also provides that in at least one transition region between an evaporator section or partial area with vertical contact and a partial area with vertical contact each pipe web Formed pipe connections or fin pipe connections, in which in each case a web and / or a pipe of a subarea with an adjacent web and / or pipe another part of two different steel materials and / or different nickel-based alloy, but with the same or similar microstructure with each other are welded.
  • FIG. 1 shows a schematic representation of a side wall of a membrane wall 1 of a large steam generator, which consists of six vertically stacked sections 2-7.
  • FIG. 1 shows a schematic representation of a side wall of a membrane wall 1 of a large steam generator, which consists of six vertically stacked sections 2-7.
  • FIG. 1 shows a schematic representation of a side wall of a membrane wall 1 of a large steam generator, which consists of six vertically stacked sections 2-7.
  • preferred material in the respective partial area 2-7 on the one hand the respective tubes carrying the medium and on the other of the respective two webs connecting web or welded to a pipe web portion in the embodiment.
  • the material-related microstructure of the respective material is specified for each area.
  • the membrane wall 1 In the lowest part, the discharge section 2 of the large steam generator, the membrane wall 1 consists of pipe-web-pipe connections, in which both the pipe and the web of ferritic-bainitic steel material 7CrMoVTiB10-10 exist.
  • the membrane wall 1 In the vertically arranged above the first evaporator section 3 of the large steam generator, in which the respective pipe withstand operating material limit temperature in the range of about equal to 550 ° C to about equal to 600 ° C, the membrane wall 1 consists of a pipe-land-pipe connection, in which pipe and bridge made of the steel material VM12, which has a martensitic microstructure.
  • Operating material limit temperature is understood to mean the temperature at which the respective pipe achieves a service life of at least 200,000 operating hours, taking into account its oxidation behavior (steam side), its corrosion behavior (flue gas / combustion chamber side) and its strength behavior (creep).
  • the evaporator section 4, the first section 5 with vertical guidance, the second section 6 with vertical guidance and the third section 7, are altogether assembled on the construction site of a power plant from individual prefabricated segments in the workshop to the respective section and membrane wall.
  • These individual membrane wall part segments 8 are usually welded to their upper and lower sides as well as at their opposite longitudinal sides with adjacent membrane wall part segments 8 '. While the adjacent segments 8 'welded to the longitudinal sides are generally each one of the same subarea 2 to 7 of the membrane wall 1, adjacent segments lying vertically and vertically above the adjacent subarea 3 to 3 may be provided on the upper and lower side 7 of the membrane wall 1 to be connected by welding.
  • the membrane wall part segments 8, 8 ' are in the evaporator section 3 of pipe-web-pipe connections or fin pipe connections 17, which are made of the steel material VM12 or T92.
  • the individual segments 8, 8' are preferably all around, ie on their upper and lower sides 11, 12 and on the two longitudinal sides with in the Workshop welded tubes 13 or webs 14, 15, 16 or fins made of a different material, in the present example of the nickel-based alloy A617 or HR6W austenitic structure provided.
  • the material sequence of ferritic-bainitic 7CrMoVTiB10-10 steel in the discharge section 2, nickel-base alloy in the upstream section and martensitic VM 12 or T 92 steel in the evaporator section 3 is thus present in the vertical direction.
  • a weld along the respective pre-grouted land area 15, 16 made of nickel-based alloy material (A617 or HR6W) is also performed. Since it is welded here in nickel-based alloy material, again there is no influence on the martensitic structure of the pipe or fin or web material adjoining the other web side.
  • the membrane wall 1 to be produced overall may be expedient for a terminating region of a respective segment 8, 8 'comprising a plurality of tubes and / or webs of nickel-based alloy material, in particular in the longitudinal edge regions 15, 16.
  • membrane part segments 8, 8 ' Another possibility of the design of the membrane part segments 8, 8 ' is that the pre-shoes on the top and bottom 11, 12 includes only the attachment of the short tubes 13. A at its top and bottom 11, 12 so vorgeuhtes membrane segment 8, 8 ', which may be provided on its longitudinal sides otherwise in one of the other ways with a material portion of nickel-based alloy material is produced in the workshop and then transported to the site. At the construction site, the upstream pipes are then welded, each with an adjacent membrane segment and the gaps remaining in the region of the webs are then closed by welding at the construction site with inserted sheets of nickel-based alloy material.
  • Such small-scale welds in which then smaller areas of the respective Diaphragm segment 8, 8 ', which consist of material with a martensitic microstructure, are welded, can be easily provided on the site with a corresponding annealing or heat treatment or it can be dispensed with in such small-scale areas such an annealing or heat treatment measure without compromising the overall strength and functionality of the membrane wall 1 as a whole.
  • a second evaporator section 4 of the steam generator In which the respective pipe withstands an operating material limit temperature in the range of approximately equal to 600 ° C to approximately equal to 620 ° C.
  • the tubes and webs are made of nickel-based alloy material A617 or HR6W, each having an austenitic microstructure.
  • a first section 5 of the large steam generator is then arranged with vertical guidance, in which the respective pipe withstands an operating material limit temperature in the range from approximately equal to 620 ° C. to approximately 600 ° C.
  • the pipes and the webs of the nickel-based alloy A617 austenitic structure are then welded together without any problem here. In particular, this is also possible because no materials with martensitic microstructure are used or are present in these areas.
  • first portion 5 with vertical bore then joins a second portion 6 of the large steam generator with Vertikalberohrung, in which the respective pipe withstands an operating material limit temperature in the range of approximately equal to 550 ° C.
  • pipes and webs of the pipe-web-pipe connection also do not consist of different nickel-based alloy materials, namely the nickel-based alloys A617 and HR6W, but both have an austenitic microstructure.
  • the transition region between the first portion 5 and second portion 6 is therefore easily realized by means of welded joints.
  • the third partial area 7 of the large steam generator adjoins the second partial area 6 of the vertical steam generator upwards in the membrane wall 1, in which the respective pipe withstands an operating material limit temperature in a range of up to approximately 600 ° C.
  • the material 7CrMoVTiB10-10 which has a ferritic-bainitic structure, is used both for the pipe and for the web of the respective pipe-web-pipe connection.
  • This material can easily be welded together at the construction site, but also with the nickel-base alloy material A617 and HR6W with austenitic microstructure, so that special measures, such as the attachment and provision of pre-fabricated material is not necessary here.
  • a membrane wall 1 of a large steam generator is created with the measures described, which can be used in the planning in the new so-called 700 ° power plants, but not consistently consists of expensive nickel-based alloy materials.
  • different materials between the pipe and fin in the respective horizontal membrane wall area for example in the membrane part segments of the second portion 6 of the large steam generator with Vertikalberohrung used.
  • these exclusion areas are formed of pre-grouted members of a nickel base alloy material. These regions can be formed and arranged both on the longitudinal sides 15, 16 and on the respective upper and lower sides 11, 12 of a membrane wall part segment 8, 8 '.
  • the membrane wall 1 also provides different materials seen over the vertical extent of the membrane wall 1, in particular also the use of materials having a ferritic-bainitic and martensitic structure.
  • Fin tubes are tubes that are deformed by a molding process, such as hot extrusion, so that two fin regions protrude diametrically opposite the cylindrical body. Fin tubes can thereby be joined together to form a membrane wall such that in each case a fin region of adjacent fin tubes is welded to a fin region of the opposite tube.
  • omega or double omega tubes can be used.
  • FIG. 2 shows a schematic plan view of a membrane wall part segment 8, which initially produced in this form as a transport unit in a workshop, then transported to the construction site of the large steam generator and there with other, each adjacent membrane wall part segments 8 'to form the membrane wall 1 is welded.
  • the membrane wall part segment 8 is one that is used in the first evaporator section 3. It consists essentially of longitudinally alternately juxtaposed and juxtaposed tubes 9 and webs 10 of the steel material VM12 or T92 with martensitic microstructure. In the longitudinal direction of the tubes 9 and webs 10 each short tube pieces 13 or web pieces 14 are each welded to a tube 9 or a web 10 at the top and bottom 11, 12 of the membrane wall part segment 8.
  • the tube and web pieces 13, 14 have a length of about 100-150 mm. These tube and web pieces 13, 14 are made of a nickel-based alloy material, in particular A617 or HR6W, which is an austenitic structure having.
  • A617 or HR6W which is an austenitic structure having.
  • the welding of the respective tubes 9 and webs 13 with the pipe sections 10 and web pieces 14 takes place in the workshop in the preparation of the membrane wall part segment 8, so that there the necessary heat and annealing treatment can be performed.
  • a web strip 15, 16 is welded to the respective outside pipe 9, which preferably has half the width of the rule web width.
  • These web portions 15, 16 are also formed of the same nickel-based alloy material as the tube and web pieces 13, 14.
  • the membrane wall part segment 8 is thus all around, ie at all its longitudinal sides and longitudinal edges vorgeschht with a material of nickel-based alloy material.
  • the diaphragm wall part segment 8 is then welded to a respective adjoining membrane wall part segment 8 'via these regions, the membrane wall part segments 8, 8' formed within the first evaporator part region 3 being preferably identical to the illustrated membrane wall part segment 8 with respect to the material composition.
  • Fig. 2 Therefore, the connection of an identical membrane wall part segment 8 'is indicated.
  • the respective membrane wall part segment 8 can then upwards and / or downwards either with identically constructed membrane wall part segments 8, 8 'or in the transition region of, for example, the first evaporator section 3 to the vertically arranged above the second evaporator section 4 with a membrane wall part segment of the second evaporator section 4 are welded, in which the pipe-web-pipe connection is made entirely of a nickel-based alloy, for example A617.
  • the pipe-web-pipe connection is made entirely of a nickel-based alloy, for example A617.
  • the membrane wall 1 is constructed overall such that it has at least one evaporator section, in the present exemplary embodiment the evaporator section 3, which consists of a martensitic material.
  • the evaporator section 3 which consists of a martensitic material.
  • pipe-web-pipe connections or fin pipe connections are formed, in which a tube of VM12 or T12, which materials have a martensitic structure, with a fin from VM12 or T12 or T92 (martensitic structure) or A617 (nickel-based alloy, austenitic structure) or HR6W (nickel-base alloy, austenitic structure).
  • these two-dimensional membrane wall regions in one of the evaporator subregions 2-7 may consist of a tube of T24 with a ferritic-bainitic structure or of 7CrMoVTiB10-10 of a ferritic-bainitic structure, on each of which at least one fin likewise made of T24 or 7CrMoVTiB10-10 or of VM12 or from 13CrMo4 - 4 is attached.
  • Another possibility is to attach a T92 or VM12 or A617 or HR6W fin to a T92 tube of martensitic structure.
  • flat diaphragm wall regions in one of the evaporator sections 2 - 7 may consist of a tube made of HR6W with a fin attached to it also made of HR6W or A617.
  • membrane wall part segments are produced from the material combinations listed above, wherein in the case of the membrane part segments 8, 8 'having VM12 or T92 tubes, regions which are at least at the longitudinal sides are formed.
  • this lateral arrangement of the pre-grooved areas of the fin area fins to be welded together are formed on the respective membrane wall part segment 8, 8 'in each case in the half-length of the total web width.
  • Another possibility is to pre-fabricate existing VM12 material membrane walls laterally with A617 or HR6W and connect to existing T24 membrane wall areas with admiruhter fin or vorschhtem web of A617 or HR6W, here also preferably the fin or the web half the rule web width having. It is also possible in each case to provide diaphragm wall regions, which consist of T92 material, in each case with Vorschuh Schemeen A617 or HR6W or diaphragm wall regions, which consist of T92 material with vorzuschten material A617 or HR6W each with membrane wall areas to be welded, the T24 material with laterally advanced material of A617 or HR6W (fin / bar or possibly tube). Again, the fin or the web can each have half the rule web width.
  • Another The combination of materials for this application is to weld T92 material pipes with A617 or HR6W pre-grouted pipe fittings with identically constructed T92 pipes with A617 or HR6W pre-grouted pipe fittings or with T24 pipes.

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  • Butt Welding And Welding Of Specific Article (AREA)

Claims (15)

  1. Paroi de membrane (1) d'un grand générateur de vapeur comprenant une pluralité de liaisons tube-entretoise-tube et/ou de liaisons de tubes à ailettes, dans lesquelles les tubes de la liaison tube-entretoise-tube ou les tubes à ailettes de la liaison de tubes à ailettes sont constituées d'un matériau de type acier avec une structure ferritique-bainitique, martensitique ou austénitique ou d'un alliage à base de nickel et l'entretoise reliant les tubes de la liaison tube-entretoise-tube ou de la liaison des tubes à ailettes est constituée, entièrement ou en combinaison, d'un matériau de type acier avec une structure ferritique-bainitique, austénitique ou martensitique ou d'un alliage à base de nickel, la paroi de membrane (1) comprenant au moins partiellement des zones dans lesquelles différents matériaux de type acier et/ou alliages à base de nickel sont reliées entre elles de manière adjacente sous la forme d'un matériau d'entretoise ou d'un matériau de tube ou sous la forme d'un matériau de tube à ailettes, et les zones adjacentes et reliées entre elles, constituées de différents matériaux d'entretoise et de matériaux de tube ou de matériaux d'ailettes, étant reliées entre elles au moyen d'une liaison soudée,
    caractérisée en ce que
    la paroi de membrane (1) comprend des zones adjacentes avec des liaisons tube-entretoise-tube ou des liaisons de tubes à ailettes constituées de différents matériaux et des zones adjacentes avec des liaisons tube-entretoise-tube ou des liaisons de tubes à ailettes constituées de matériaux identiques, plus particulièrement de même structure, et en ce que les différents matériaux d'entretoises ou de tubes ou les différents matériaux de tubes à ailettes présentent des coefficients de dilatation thermique comparables, ayant un écart entre eux de maximum +/- 20 %.
  2. Paroi de membrane selon la revendication 1, caractérisée en ce que les différents matériaux d'entretoises ou de tubes ou les différents matériaux de tubes à ailettes présentent des structures différentes.
  3. Paroi de membrane selon la revendication 1 ou 2, caractérisée en ce qu'une portion d'entretoise d'une liaison tube-entretoise-tube ou d'une liaison de tubes à ailettes s'étend seulement sur une partie de la largeur de réglage de l'entretoise.
  4. Paroi de membrane selon l'une des revendications précédentes, caractérisée en ce que la paroi de membrane (1) est constituée par endroits, plus particulièrement dans la zone partielle d'évacuation (2) du grand générateur de vapeur, de liaisons tube-entretoise-tube ou de liaisons de tubes à ailettes, dans lesquelles l'entretoise et le tube ou le tube à ailettes sont constitués d'un matériau de type acier avec une structure ferritique-bainitique, plus particulièrement de 7CrMoVTiB10-10 ou du T24,
    ou
    en ce que la paroi de membrane (1) est constituée par endroits, plus particulièrement dans une première zone partielle d'évaporateur (3) du grand générateur de vapeur au-dessus de la zone partielle d'évacuation (3), de liaisons tube-entretoise-tube ou de liaisons de tubes à ailettes, chacune constituées d'un matériau de type acier martensitique, plus particulièrement de VM12 ou de T92 ou de X10CrWMoVNb9-2.
  5. Paroi de membrane selon l'une des revendications précédentes, caractérisée en ce que la paroi de membrane (1), plus particulièrement dans la première zone partielle d'évaporateur (3), comprend au moins par endroits des liaisons tube-entretoise-tube, qui comprennent au moins un tube (9) présentant une structure martensitique, plus particulièrement de VM12 ou de T92, avec une entretoise (15, 16) soudée ou une ailette soudée constituée d'un alliage à base de nickel, de préférence avec une structure austénitique, plus particulièrement de A617 ou de HR6W,
    ou
    en ce que la paroi de membrane (1), plus particulièrement dans la première zone partielle d'évaporateur (3), comprend au moins par endroits des liaisons tube-entretoise-tube, qui comprennent une entretoise (10) avec une structure martensitique, plus particulièrement en VM12 ou en T92, avec un tube soudé constitué d'un alliage à base de nickel, de préférence avec une structure austénitique, plus particulièrement de A617 ou de HR6W.
  6. Paroi de membrane selon la revendication 5, caractérisée en ce que les zones des entretoises (15, 16) soudées ou des ailettes ou des tubes sont constituées, au niveau des côtés longitudinaux, d'un segment partiel de paroi de membrane (8, 8') constitué globalement d'un matériau de type acier avec une structure martensitique, plus particulièrement de VM12 ou de T92.
  7. Paroi de membrane selon l'une des revendications précédentes, caractérisée en ce que la paroi de membrane (1), plus particulièrement dans la première zone partielle d'évaporateur (3), est constituée au moins par endroits de liaisons tube-entretoise-tube ou de liaisons de tubes à ailettes, dans lesquelles, au niveau de portions tube-entretoise-tube ou de portions de tubes à ailettes constituées d'un matériau à structure martensitique, plus particulièrement de VM12 ou de T92, sont soudées des portions de tubes (13) ou des portions de tubes à ailettes et/ou des portions d'entretoises (14) constituées d'un alliage à base de nickel, de préférence avec une structure austénitique, plus particulièrement de A617 ou de HR6W,
    de préférence
    les zones des portions de tubes (13) soudées ou les portions de tubes à ailettes et/ou les portions d'entretoises (14) sont formées le long du côté supérieur et/ou inférieur (11, 12) d'un segment partiel de paroi de membrane (8, 8') avec une structure martensitique, plus particulièrement de VM12 ou de T92.
  8. Paroi de membrane selon l'une des revendications 5 à 7, caractérisée par un segment partiel de paroi de membrane (8, 8') constitué globalement d'un matériau de type acier avec une structure martensitique, qui comprend, le long de son côté supérieur et inférieur (11, 12), des portions de tubes (13) et/ou des portions d'entretoises (14) ou des portions de tubes à ailettes soudées et, le long de ses côtés longitudinaux, des zones d'entretoises ou d'ailettes (15, 16) en matériau de type alliage à base de nickel,
    de préférence
    les portions ou zones de la paroi de membrane (1) ou des segments partiels de la paroi de membrane (8, 8'), comprenant un tube constitué d'un matériau de type alliage à base de nickel et/ou une entretoise constitué d'un matériau de type alliage à base de nickel, comprenant chacune plusieurs tubes et/ou entretoises.
  9. Paroi de membrane selon l'une des revendications précédentes, caractérisée en ce que la paroi de membrane (1) est constituée par endroits, plus particulièrement dans une deuxième zone partielle d'évaporateur (4) du grand générateur de vapeur, de liaisons tube-entretoise-tube ou de liaisons de tubes à ailettes, dans lesquelles l'entretoise et le tube ou le tube à ailettes sont constitués chacun d'un alliage à base de nickel avec une structure austénitique, plus particulièrement de A617 ou de HR6W,
    ou
    en ce que la paroi de membrane (1), plus particulièrement dans la zone de transition entre la première zone partielle d'évaporateur (3) et la deuxième zone partielle d'évaporateur (4), est constituée au moins par endroits d'un segment partiel de paroi de membrane (8, 8') constitué d'un matériau de type acier avec une structure martensitique, plus particulièrement de VM12 ou de T92, avec une zone ou portion soudée en alliage à base de nickel, de préférence avec une structure austénitique, plus particulièrement en A617 ou en HR6W,

    ou
    en ce que la paroi de membrane (1) est constituée par endroits, plus particulièrement dans une première zone partielle (5) du grand générateur de vapeur avec un tubage vertical, est constitué de liaisons tube-entretoise-tube ou de liaisons de tubes à ailettes, dans lesquelles l'entretoise et le tube ou le tube à ailettes sont constitués chacun d'un alliage à base de nickel, de préférence avec une structure austénitique, plus particulièrement de A617 ou de HR6W, ou
    en ce que la paroi de membrane (1) est constituée par endroits, plus particulièrement dans une deuxième zone partielle (6) du grand générateur de vapeur avec un tubage vertical, de préférence au niveau des surchauffeurs, au moins par endroits de liaisons tube-entretoise-tube ou de liaisons de tubes à ailettes, qui comprennent chacune un tube en alliage à base de nickel, plus particulièrement de A617, avec une entretoise soudée constituée d'un alliage à base de nickel différent de celui-ci, plus particulièrement du HR6W, les deux matériaux présentant de préférence une structure austénitique,
    ou
    en ce que la paroi de membrane (1) est constituée par endroits, plus particulièrement dans une troisième zone partielle (7) du grand générateur de vapeur, au moins par endroits de liaisons tube-entretoise-tube ou de liaisons de tubes à ailettes, dans lesquelles l'entretoise et le tube adjacent ou les tubes à ailettes adjacents sont constitués chacun d'un matériau de type acier avec une structure ferritique-bainitique, plus particulièrement de 7CrMoVTiB10-10.
  10. Paroi de membrane selon l'une des revendications précédentes, caractérisée en ce que, dans la zone partielle d'évacuation (2) et/ou dans la première zone partielle d'évaporateur (3) et/ou dans la deuxième zone partielle d'évaporateur (4) et/ou dans la première zone partielle (5) avec tubage vertical et/ou dans la deuxième zone partielle (6) avec tubage vertical et/ou dans la troisième zone partielle (7) du grand générateur de vapeur, se trouvent respectivement des liaisons tube-entretoise-tube ou des liaisons de tubes à ailettes, dans lesquelles une entretoise et un tube adjacent à celle-ci ou deux zones à entretoises adjacentes de la liaison tube-entretoise-tube ou deux tubes à ailettes adjacents de la liaison de tubes à ailettes sont soudés entre eux à l'aide d'un matériau de type acier différent et/ou d'un alliage à base de nickel différent et/ou de matériaux avec des structures différentes.
  11. Paroi de membrane selon l'une des revendications précédentes, caractérisée en ce que, dans la zone partielle d'évacuation (2) et/ou dans la première zone partielle d'évaporateur (3) et/ou dans la deuxième zone partielle d'évaporateur (4) et/ou dans la première zone partielle (5) avec tubage vertical et/ou dans la deuxième zone partielle (6) avec tubage vertical et/ou dans la troisième zone partielle (7), se trouvent respectivement des liaisons tube-entretoise-tube ou des liaisons de tubes à ailettes, dans lesquelles une entretoise et un tube adjacent à celle-ci ou deux zones à entretoises adjacentes de la liaison tube-entretoise-tube ou deux tubes à ailettes adjacents de la liaison de tubes à ailettes sont soudés entre eux à l'aide du même matériau de type acier et/ou du même alliage à base de nickel et/ou de matériaux avec la même structure.
  12. Paroi de membrane selon l'une des revendications précédentes, caractérisée en ce que, dans au moins une des zones partielles d'évaporateur (3, 4) et des zones partielles (5, 6) avec tubage vertical, se trouvent respectivement des liaisons tube-entretoise-tube ou des liaisons de tubes à ailettes, dans lesquelles une entretoise et un tube adjacent à celle-ci ou deux zones d'entretoises adjacentes de la liaison tube-entretoise-tube ou deux tubes à ailettes adjacents de la liaison de tubes à ailettes sont respectivement soudés entre eux à l'aide d'un matériau de type acier différent et/ou d'un alliage à base de nickel différent, mais avec une structure identique ou similaire.
  13. Paroi de membrane selon l'une des revendications précédentes, caractérisée en ce que, dans la zone de transition entre la zone partielle d'évacuation (2) et la première zone partielle d'évaporateur (3) et/ou dans la zone de transition entre la première zone partielle d'évaporateur (3) et la deuxième zone partielle d'évaporateur (4) et/ou dans la zone de transition entre la deuxième zone partielle d'évaporateur (4) et la première zone partielle (5) avec tubage vertical et/ou dans la zone de transition entre la première zone partielle (5) avec tubage vertical et la deuxième zone partielle (6) avec tubage vertical et/ou dans la zone de transition entre la deuxième zone partielle (6) avec tubage vertical et la troisième zone partielle (7) du grand générateur de vapeur, se trouvent respectivement des liaisons tube-entretoise-tube ou des liaisons de tubes à ailettes, dans lesquelles une entretoise et un tube d'une zone partielle (2 à 6) sont respectivement soudés avec une entretoise adjacente et/ou un tube adjacent d'une autre zone partielle (3 à 7) à l'aide d'un matériau de type acier différent et/ou d'un alliage à base de nickel différent et/ou de matériaux de structures différentes.
  14. Paroi de membrane selon l'une des revendications précédentes, caractérisée en ce que, dans la zone de transition entre la deuxième zone partielle d'évaporateur (4) et la première zone partielle (5) avec tubage vertical et/ou dans la zone de transition entre la première zone partielle (5) avec tubage vertical et la deuxième zone partielle (6) avec tubage vertical, se trouvent respectivement des liaisons tube-entretoise-tube ou des liaisons de tubes à ailettes, dans lesquelles une entretoise et un tube d'une zone partielle (4, 5) sont respectivement soudés avec une entretoise adjacente et/ou un tube adjacent d'une autre zone partielle (5, 6) à l'aide du même matériau de type acier et/ou du même alliage à base de nickel et/ou d'un matériau de structure identique.
  15. Paroi de membrane selon l'une des revendications précédentes, caractérisée en ce que, dans au moins une zone de transition entre une zone partielle d'évaporateur (4) ou une zone partielle (5) avec tubage vertical et une zone partielle (5, 6) avec tubage vertical, se trouvent respectivement des liaisons tube-entretoise-tube ou des liaisons de tubes à ailettes, dans lesquelles une entretoise et/ou un tube d'une zone partielle (4, 5) sont respectivement soudés avec une entretoise adjacente et/ou un tube adjacent d'une autre zone partielle (5, 6) à l'aide d'un matériau de type acier différent et/ou d'un alliage à base de nickel différent, mais avec une structure identique ou similaire.
EP09772046.0A 2008-07-02 2009-04-21 Paroi-membrane d'une chaudière à vapeur industrielle Revoked EP2297517B1 (fr)

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RS20160627A RS55108B1 (sr) 2008-07-02 2009-04-21 Membranski zid jednog velikog proizvođača pare
HRP20161007TT HRP20161007T1 (hr) 2008-07-02 2009-04-21 Membranska stijenka za industrijski generator pare
MEP-2016-179A ME02471B (me) 2008-07-02 2009-04-21 Membranski zid jednog velikog proizvođača pare

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DE102008030953 2008-07-02
DE102008047784A DE102008047784A1 (de) 2008-07-02 2008-09-17 Membranwand eines Großdampferzeugers
PCT/EP2009/002888 WO2010000346A2 (fr) 2008-07-02 2009-04-21 Paroi-membrane d'une chaudière à vapeur industrielle

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EP3623699A1 (fr) 2018-09-12 2020-03-18 Balcke-Dürr GmbH Chaudière générateur de vapeur, centrale électrique ou installation d'incinération des déchets et procédé de sécurisation des travaux d'entretien sur une chaudière générateur de vapeur

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WO2010000346A3 (fr) 2010-05-20
DK2297517T3 (en) 2016-08-29
HRP20161007T1 (hr) 2016-10-21
CY1117894T1 (el) 2017-05-17
WO2010000346A2 (fr) 2010-01-07
DE102008047784A1 (de) 2010-01-07
ES2587855T3 (es) 2016-10-27
WO2010000346A4 (fr) 2010-07-08
EP2297517A2 (fr) 2011-03-23
PT2297517T (pt) 2016-08-18
PL2297517T3 (pl) 2016-11-30
RS55108B1 (sr) 2016-12-30
LT2297517T (lt) 2016-09-12
HUE030359T2 (en) 2017-05-29
ME02471B (me) 2017-02-20

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