EP2473782B1 - Dispositif de production de vapeur à circulation forcée prévu pour l'utilisation à des températures de vapeur supérieures à 650°c - Google Patents

Dispositif de production de vapeur à circulation forcée prévu pour l'utilisation à des températures de vapeur supérieures à 650°c Download PDF

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Publication number
EP2473782B1
EP2473782B1 EP10768369.0A EP10768369A EP2473782B1 EP 2473782 B1 EP2473782 B1 EP 2473782B1 EP 10768369 A EP10768369 A EP 10768369A EP 2473782 B1 EP2473782 B1 EP 2473782B1
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EP
European Patent Office
Prior art keywords
steam generator
once
heating surface
steam
combustion chamber
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP10768369.0A
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German (de)
English (en)
Other versions
EP2473782A2 (fr
Inventor
Thoralf Berndt
Qiurong Chen
Georg-Nikolaus Stamatelopoulos
Gerhard Weissinger
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.)
General Electric Technology GmbH
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Alstom Technology AG
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Filing date
Publication date
Application filed by Alstom Technology AG filed Critical Alstom Technology AG
Priority to SI201031235A priority Critical patent/SI2473782T1/sl
Publication of EP2473782A2 publication Critical patent/EP2473782A2/fr
Application granted granted Critical
Publication of EP2473782B1 publication Critical patent/EP2473782B1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B29/00—Steam boilers of forced-flow type
    • F22B29/06—Steam boilers of forced-flow type of once-through type, i.e. built-up from tubes receiving water at one end and delivering superheated steam at the other end of the tubes
    • 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
    • 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
    • F22B37/14—Supply mains, e.g. rising mains, down-comers, in connection with water tubes
    • F22B37/143—Panel shaped heating surfaces built up from tubes

Definitions

  • the invention relates to a forced once-through steam generator for the use of steam temperatures of about 650 ° C, the forced flow steam generator having a combustion chamber and a subsequent end of the upper flue and this surrounding Um chargedsleton, wherein the Um chargedsbuild are formed from tube walls whose tubes the working fluid water / Steam lead, the combustion chamber has at least one burner and are arranged in the flue gas Nachschaltsammlungdon.
  • Continuous or forced circulation steam generators are from the publication " Kraftwerkstechnik”, Springer-Verlag, 2nd edition 1994, Chapter 4.4.2.4-Forced circulation (pages 171 to 174 ), Prof. Dr.-Ing. Karl Strauß known, which are used in power plants for the production of electrical energy by combustion of, for example, fossil fuels.
  • a continuous flow or continuous flow steam generator the heating of the combustion chamber or the gas flue forming tube walls or enclosing walls - in contrast to a natural circulation or forced circulation steam generator with only partial evaporation of circulating water-steam mixture - leads to an evaporation of the flow or working medium in the tubes of the pipe walls or enclosing walls in a single pass.
  • the highly stressed parts helical winding and vertical bore
  • the perimeter walls formed as tube walls are made of the special materials T23 (a material approved by ASME (American Society of Mechanical Engineers)), T24 (7CrMoVTiB10-10) or other materials of similar chemical composition, all of which are of the generic type of the modified, heat-resistant 2.25-2.5% chromium steels count.
  • the material T23 is listed, for example, in VdTÜV Material Data Sheet 511/2, issue 06.2001, and the material T24 is listed, for example, in the standard sheet DIN EN 10216-2, October 2007 issue.
  • These materials have the advantage that they are best suited for the aforementioned steam parameters and that they can be welded without post-heat treatment and thus the creation of the perimeter walls or pipe walls and their installation on the site are easy to carry out.
  • Possible materials for these increased boundary wall temperatures are martensitic 9-12% chromium steels such as T91 (X10CrMoVNb9-1), T92 (X10CrWMoVNb9-2) and VM12-SHC (factory designation of the company Vallourec-Mannesmann) or Ni-base alloys such as Alloy 617 ( NiCr23Co12Mo) or Alloy 617mod.
  • martensitic 9-12% chromium steels such as T91 (X10CrMoVNb9-1), T92 (X10CrWMoVNb9-2) and VM12-SHC (factory designation of the company Vallourec-Mannesmann) or Ni-base alloys such as Alloy 617 ( NiCr23Co12Mo) or Alloy 617mod.
  • marlensitic 9-12% chromium steal or Ni base alloys for the perimeter walls requires complicated manufacturing and assembly operations.
  • the martensitic 9-12% chromium steels must be heat treated after welding in the workshop and during assembly.
  • special tempering furnaces as well as on the construction site special annealing cassettes needed.
  • Ni-base alloys In the production or assembly of Ni-base alloys excessively large shrinkage processes must be mastered.
  • Ni base alloys their procurement costs are significantly higher than those of steels. For both of these solutions are therefore expected to higher costs, both in terms of the cost of materials and the manufacturing and assembly costs.
  • the heat absorption in the evaporator is not limited in a forced once-through steam generator, since the medium temperature at the evaporator outlet in forced continuous operation is already overheated and the amount of overheating can be set variably.
  • the associated temperature level of the steam or the associated calculation temperature in the enclosure walls is governed by a suitable choice of materials with respect to the enclosure walls.
  • the object of the invention is therefore to provide a forced once-through steam generator for the use of steam temperatures of over 650 ° C, in which the aforementioned disadvantages are avoided or in terms of Um chargedsplin or pipe walls of the once-through steam generator simple and not complicated and difficult to control manufacturing and assembly operations are to be carried out.
  • An advantageous embodiment provides that in the region of the combustion chamber, a part of the enclosing walls covering Schottenmosisation between the upper edge of the uppermost situated burner and lower edge of the lowermost Nachschaltflowerization is arranged.
  • a certain area of the combustion chamber is covered with a Schottenmosization on which otherwise a large part of the heat from the combustion chamber would reach the Um chargedsplin and their medium temperature in the enclosure wall and the wall temperature itself would increase so that higher quality materials would have to be used ,
  • At least part of the enclosing walls is formed from one of the materials T23, T24 or another material having a similar chemical composition.
  • at least the part of the surrounding walls is formed with the aforementioned materials, which is thermally highly loaded or higher than the remaining part of the surrounding walls.
  • the materials T23, T24 or another material with a similar chemical composition are high-quality materials which are commercially available and which meet the desired requirements or, after their welding, no heat post-treatment must be carried out on them.
  • An advantageous embodiment of the invention provides for the SchottenMap operation of martensitic materials with 9-12% chromium, austenitic materials or nickel-based alloys form or manufacture. This ensures that the requirements of the exposed in the combustion chamber Schottenflower Construction is satisfied in terms of temperatures.
  • the bulkhead heating surface is designed as a superheater or reheater heating surface.
  • An advantageous embodiment provides that the bulkhead heating surface is arranged parallel to the surrounding wall. This ensures that the Schottenmosization configuration as well as the surrounding wall is arranged vertically and provides a minimum possible attack surface for ash or slag from the combustion chamber.
  • An expedient embodiment provides that the bulkhead heating surface extends adjacent to the surrounding wall. This ensures that the enclosure wall is optimally covered by the bulkhead heating surface and that the lowest possible amount of heat reaches the enclosure wall.
  • FIG. 1 schematically shows a continuous flow or continuous flow steam generator 1 (both terms mean the same thing, namely the generation of steam within the steam generator in one run) in tower construction, ie the pipe walls 5 (as surrounding walls 4) and all Nachschaltsammlung vom 7 are on or in housed in a single vertical throttle cable.
  • the vertical throttle cable which is formed or bounded by gas-tight enclosure walls 4, includes in the lower region of the combustion chamber 2 and the subsequent flue 3.
  • the combustion chamber 2 usually closes down with a combustion chamber funnel and extends up to to the lowest Nachschaltflower Structure 7.
  • one or more burners 6 are arranged for burning a fossil fuel.
  • the burners 6 can be arranged either in the corners (corner burners) or in the walls (wall burners) of the combustion chamber 2.
  • the various Nachschaltsammlungvon 7 are arranged as Bermmungsflower lake. These are typically economizer heating surfaces, superheater and reheater heating surfaces.
  • the flue 3 closes up with a ceiling and he has at its upper end laterally a flue gas outlet 9.
  • the once-through steam generator 1 has at least one steam heating surface 8, which covers a part of the surrounding walls 4 in the region of the combustion chamber 2 and whose area-side size is determined such that the heat absorption of the surrounding walls 4 and consequently their temperature is reduced to a value which reduces the formation the perimeter wall 4 of modified, heat-resistant 2.25-2.5% chromium steels permits, which require no post-treatment after their welding technology processing.
  • the enclosing wall 4 in the region of the combustion chamber 2 with a predetermined surface-side size covering Schottenflower Design 8 takes from the combustion chamber 2 so much heat that the heat absorption of the perimeter wall 4 is reduced due to the cover such that the maximum medium temperature at the perimeter wall.
  • modified, heat-resistant 2.25-2.5% chromium steels permits, which require no heat aftertreatment after their welding technical processing.
  • These may be, for example, the materials T23 (a material approved by the American Society of Mechanical Engineers), T24 (7CrMoVTiB10-10) or another material of similar chemical composition covering steam temperatures up to about 500-510 ° C and listed, for example, in the booklet "The T23 / T24 Book, New Grades for Waterwalls and Superheaters by Vallourec & Mannesmann Tubes" (booklet on modified, heat-resistant 2.25-2.5% chromium steels).
  • the now used high-quality materials that do not require after-treatment heat treatment and no elaborate processing can either be used anywhere on the Um chargedswand 4 or according to a commercially advantageous variant, at least on the parts of the enclosing walls 4, their high thermal load this is required. These are, for example, the areas on the burners 6 and directly above the burners 6 within the combustion chamber 2. On the parts of the Um chargedsnova 4, the thermal load is lower, such as in the lower part of the combustion chamber 2 (below the burner 6 including combustor funnel) with Medium temperatures of about ⁇ 400-460 ° C in the tube walls, to reduce the investment costs compared to the aforementioned high quality materials lower valued materials, such. 8. 16Mo3 or 13CrMo45, used. These materials also need after their welding technology no postheat treatment or no further elaborate processing.
  • the enclosing walls 4, which are formed as tube walls 5, are usually made of a welded pipe-web-tube combination, wherein the tubes of the Pipe walls 5, the working medium water / steam and lead within the enclosure walls 4 either obliquely or vertically or can be formed from a combination of oblique and vertical.
  • the arranged in the Um drawnstentn 4 tubes are used in the lower and middle part of the combustion chamber 2 as evaporator tubes, ie, the fed and preheated water is evaporated in these evaporator tubes.
  • the pipes arranged in the surrounding wall 4 can already be connected as a superheater heating surface.
  • the Schottenflower Design 8 itself which now receives a portion of the heat from the combustion chamber 2 is formed according to the temperature requirements with suitable materials. Since very high temperatures are to be controlled, martensitic 9-12% chromium-containing steels, austenitic steels or nickel-based alloys have proven suitable for this purpose.
  • the Schottenmositic materials T91 (X10CrMoVNb9-1), T92 (X10CrWMoVNb9-2) or VM12-SHC, the austenitic steels SUPER 304H, HR3C, DMV304HCu, DMV3101N or Ni base alloys such as Alloy 617 (NiCr23Co12Mo) or Alloy 617mod ( NiCr23Co12Mo mod).
  • the Schottenterrorism composition 8 may consist of individual, closely spaced and parallel tubes or a pipe-web-tube construction. The tubes of the Schottenflowering Structure 8 usually run horizontally within the heating surface, but can also extend vertically.
  • the Schottenflower Design 8 is preferably arranged parallel to the Um chargedswand 4 and more preferably adjacent to the latter. By this arrangement it is ensured that the enclosure wall 4 is covered very efficiently by the Schottensammlung Structure 8 and thus the transfer of heat to the enclosure wall 4 is largely prevented.
  • FIG. 2 an advantageous variant of the Schottensammlung configuration invention 8 is shown.
  • the perimeter wall 4 or pipe wall 5, which generally include the front and rear walls and two side walls of the once-through steam generator, in the region of the combustion chamber 2 between the upper edge of the uppermost burner 6 and lower edge of the lowest Nachschaltflowering 7 ⁇ the area is in FIG. 2 marked with "S"), for Part covered by one or more Schottenflower Materials (s) 8, according to FIG.
  • a Schottenflower configuration 8 ie a total of four, are arranged on each individual tube wall.
  • the targeted arrangement of the Schottensammlung operation 8 especially in this area of the combustion chamber 2 can glossy targeted the usually hottest area of the perimeter wall 4 and tube wall 5 are covered within the combustion chamber 2.
  • the Schottensammlung Design 8 can be advantageously used as a superheater heating within the forced flow steam generator 1. However, it is also possible to use it as a reheater heating surface.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Metallurgy (AREA)
  • Heat Treatment Of Articles (AREA)
  • Air Supply (AREA)
  • Chimneys And Flues (AREA)
  • Gas Burners (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
  • Combustion Of Fluid Fuel (AREA)

Claims (8)

  1. Générateur de vapeur à passage forcé unique pour l'utilisation de températures de vapeur supérieures à 650°C, le générateur de vapeur à passage forcé unique (1) comprenant une chambre de combustion (2) et un carneau de fumées (3) raccordé à cette dernière en son extrémité supérieure, ainsi que des parois extérieures (4) l'entourant, les parois extérieures (4) étant constituées de plaques tubulaires (5), dont les tubes guident le fluide moteur eau/vapeur, la chambre de combustion (2) comprenant au moins un brûleur (6), et des surfaces de chauffe aval (7) étant disposées dans le carneau de fumées (3),
    dans lequel une partie des parois extérieures (4) est, dans la zone de la chambre de combustion (2), recouverte par au moins une surface de chauffe convective (8), caractérisé en ce que les parois extérieures (4) sont constituées d'aciers au chrome à 2,25-2,5 % réfractaires modifiés, qui après leur transformation par des techniques de soudage n'exigent pas de post-traitement thermique.
  2. Générateur de vapeur à passage forcé unique selon la revendication 1, caractérisé en ce que la surface de chauffe convective (8) qui recouvre une partie des parois extérieures (4) dans la zone de la chambre de combustion (2) est disposée entre le bord supérieur du brûleur (6) situé en le point le plus élevé et le bord inférieur de la surface de chauffe convective (7) située au point le plus bas.
  3. Générateur de vapeur à passage forcé unique selon la revendication 1, caractérisé en ce qu'au moins une partie des parois extérieures (4) est constituée de l'un des matériaux T23, T24, ou d'un autre matériau ayant une composition chimique analogue.
  4. Générateur de vapeur à passage forcé unique selon au moins l'une des revendications précédentes, caractérisé en ce que la surface de chauffe convective (8) est formée d'aciers martensitiques contenant 9 à 12 % de chrome, d'aciers austénitiques ou d'alliages à base de nickel.
  5. Générateur de vapeur à passage forcé unique selon au moins l'une des revendications précédentes, caractérisé en ce que la surface de chauffe convective (8) est conçue comme une surface de chauffe de surchauffeur.
  6. Générateur de vapeur à passage forcé unique selon au moins l'une des revendications précédentes, caractérisé en ce que la surface de chauffe convective (8) est conçue comme une surface de chauffe de resurchauffeur.
  7. Générateur de vapeur à passage forcé unique selon au moins l'une des revendications précédentes, caractérisé en ce que la surface de chauffe convective (8) est disposée parallèlement à la paroi extérieure (4).
  8. Générateur de vapeur à passage forcé unique selon au moins l'une des revendications précédentes, caractérisé en ce que la surface de chauffe convective (8) court en s'appuyant contre la paroi extérieure (4).
EP10768369.0A 2009-09-04 2010-08-20 Dispositif de production de vapeur à circulation forcée prévu pour l'utilisation à des températures de vapeur supérieures à 650°c Active EP2473782B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI201031235A SI2473782T1 (sl) 2009-09-04 2010-08-20 Generator pare s prisilnim tokom za uporabo pri temperaturah pare nad 650 stopinj C

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009040250.0A DE102009040250B4 (de) 2009-09-04 2009-09-04 Zwangdurchlaufdampferzeuger für den Einsatz von Dampftemperaturen von über 650 Grad C
PCT/DE2010/000981 WO2011026461A2 (fr) 2009-09-04 2010-08-20 Dispositif de production de vapeur à circulation forcée prévu pour l'utilisation à des températures de vapeur supérieures à 650°c

Publications (2)

Publication Number Publication Date
EP2473782A2 EP2473782A2 (fr) 2012-07-11
EP2473782B1 true EP2473782B1 (fr) 2016-04-20

Family

ID=43649690

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EP10768369.0A Active EP2473782B1 (fr) 2009-09-04 2010-08-20 Dispositif de production de vapeur à circulation forcée prévu pour l'utilisation à des températures de vapeur supérieures à 650°c

Country Status (11)

Country Link
US (1) US20120291720A1 (fr)
EP (1) EP2473782B1 (fr)
CN (1) CN102713433B (fr)
DE (1) DE102009040250B4 (fr)
HU (1) HUE028255T2 (fr)
IN (1) IN2012DN02836A (fr)
PL (1) PL2473782T3 (fr)
RU (1) RU2546888C2 (fr)
SI (1) SI2473782T1 (fr)
WO (1) WO2011026461A2 (fr)
ZA (1) ZA201201884B (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011054718B4 (de) * 2011-10-21 2014-02-13 Hitachi Power Europe Gmbh Verfahren zur Erzeugung einer Spannungsverminderung in errichteten Rohrwänden eines Dampferzeugers

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Also Published As

Publication number Publication date
HUE028255T2 (en) 2016-12-28
WO2011026461A8 (fr) 2012-04-05
CN102713433A (zh) 2012-10-03
PL2473782T3 (pl) 2016-12-30
DE102009040250A1 (de) 2011-04-07
EP2473782A2 (fr) 2012-07-11
ZA201201884B (en) 2013-05-29
US20120291720A1 (en) 2012-11-22
WO2011026461A3 (fr) 2012-07-26
DE102009040250B4 (de) 2015-05-21
WO2011026461A2 (fr) 2011-03-10
SI2473782T1 (sl) 2016-08-31
RU2012112947A (ru) 2013-10-10
CN102713433B (zh) 2015-09-23
RU2546888C2 (ru) 2015-04-10
IN2012DN02836A (fr) 2015-07-24

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