WO2019106019A1 - Système et procédé pour permettre une dilatation thermique dans une centrale de production d'énergie - Google Patents

Système et procédé pour permettre une dilatation thermique dans une centrale de production d'énergie Download PDF

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Publication number
WO2019106019A1
WO2019106019A1 PCT/EP2018/082856 EP2018082856W WO2019106019A1 WO 2019106019 A1 WO2019106019 A1 WO 2019106019A1 EP 2018082856 W EP2018082856 W EP 2018082856W WO 2019106019 A1 WO2019106019 A1 WO 2019106019A1
Authority
WO
WIPO (PCT)
Prior art keywords
header
boiler
outlet
steam
turbine
Prior art date
Application number
PCT/EP2018/082856
Other languages
English (en)
Inventor
Tihomir PIPLICA
Original Assignee
General Electric Technology Gmbh
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 General Electric Technology Gmbh filed Critical General Electric Technology Gmbh
Priority to US16/765,201 priority Critical patent/US20200284428A1/en
Priority to CN201880071351.8A priority patent/CN111295499A/zh
Priority to EP18811516.6A priority patent/EP3717751A1/fr
Publication of WO2019106019A1 publication Critical patent/WO2019106019A1/fr

Links

Classifications

    • 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
    • F22B37/42—Applications, arrangements, or dispositions of alarm or automatic safety devices
    • F22B37/47—Applications, arrangements, or dispositions of alarm or automatic safety devices responsive to abnormal temperature, e.g. actuated by fusible plugs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K13/00—General layout or general methods of operation of complete plants
    • F01K13/006—Auxiliaries or details not otherwise provided for
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B13/00—Steam boilers of fire-box type, i.e. the combustion of fuel being performed in a chamber or fire-box with subsequent flue(s) or fire tube(s), both chamber or fire-box and flues or fire tubes being built-in in the boiler body
    • F22B13/14—Component parts thereof; Accessories therefor
    • F22B13/16—Stay-bolt connections, e.g. rigid connections
    • F22B13/18—Flexible connections, e.g. of ball-and-socket type
    • 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
    • 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
    • F22B37/104—Connection of tubes one with the other or with collectors, drums or distributors
    • 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
    • F22B37/42—Applications, arrangements, or dispositions of alarm or automatic safety devices
    • F22B37/44—Applications, arrangements, or dispositions of alarm or automatic safety devices of safety valves
    • F22B37/446—Safety devices responsive to overpressure

Definitions

  • Embodiments of the invention relate generally to power generation and, more particularly, to a system and method for accommodating thermal displacement in a power generation plant.
  • thermodynamic efficiency in a steam turbine -based power plant depends at least in part on the temperature and pressure of the steam, specifically, the higher the temperature and pressure of the steam, the greater the potential efficiency. Consequently, there has been a move in recent years to employ even higher steam temperatures and pressures than in the past. This trend has led to the development of new classes of power plants including a so-called“ultra-supercritical power plant” (which uses steam cycles at temperatures greater than about 600°C and steam pressures in excess of 240 bar), and the advanced ultra-supercritical power plant (which uses steam cycles at even greater temperatures, in the range of about 700°C to about 760°C).
  • the steam generator (boiler) can often be in excess of 100 meters tall, and the main steam outlet and hot reheat outlet are typically located in a top portion of the boiler (i.e., well above ground level). Relatively long lengths of main steam piping and hot reheat piping are therefore necessary to connect the main steam outlet headers and hot reheat outlet headers at the top portion of the boiler to the turbines (e.g., the high-pressure turbine and intermediate pressure turbine, respectively), which are typically located at ground level.
  • the turbines e.g., the high-pressure turbine and intermediate pressure turbine, respectively
  • expansion loops are typically fabricated from standard pipes and elbows, having the same wall thickness and inside diameter of the pipes of the boiler piping system and are conventionally employed to absorb temperature expansion and contraction in steel pipes.
  • the use of such expansion loops results in the need for additional pipe length (e.g., to form the expansion loops) and material costs.
  • a system for a power generation plant includes a boiler having a superheater, a first header fluidly coupled to an outlet of the superheater and being configured to receive steam from the superheater.
  • a turbine is positioned generally adjacent to the outlet of the superheater, and a main steam piping system extends from the first header to the turbine and is arranged to direct a flow of the steam from the first header to the turbine.
  • the system also includes a first flexible portion upstream from the first header, fluidly coupled between the first header and the boiler.
  • a system for a power generation plant includes a boiler having a superheater and a reheater.
  • a main steam outlet header is fluidly coupled to an outlet of the superheater and is arranged to receive steam from the superheater.
  • a hot reheat outlet header is fluidly coupled to an outlet of the reheater and is arranged to receive steam from the reheater.
  • the system further includes a high-pressure turbine adjacent to the outlet of the superheater, and an intermediate -pressure turbine adjacent to the outlet of the reheater.
  • a main steam piping system extends from the main steam outlet header to the high-pressure turbine and is configured to direct a flow of the steam from the main steam piping system to the high- pressure turbine.
  • a hot reheat piping system extends from the hot reheat outlet header to the intermediate -pressure turbine and is configured to direct a flow of the steam from the hot reheat piping system to the intermediate -pressure turbine.
  • the system includes a first flexible portion upstream from the main steam outlet header which is operative to flex with respect to the main steam outlet header and the boiler in response to a thermal displacement of the boiler; and the system further includes a second flexible portion upstream from the hot reheat outlet header which is operative to flex with respect to the hot reheat outlet header and the boiler in response to the thermal displacement of the boiler.
  • FIG. 1 is a schematic illustration of a coal-fired power generation plant, according to an embodiment of the invention.
  • FIG. 2 is a perspective view of a main steam piping arrangement and hot reheat piping arrangement of the coal-fired power generation plant of FIG. 1 , according to an embodiment of the invention.
  • FIG. 3 is a detailed perspective view of the main steam piping
  • FIG. 4 is a detailed perspective view of the hot reheat piping arrangement of FIG. 2.
  • FIG. 5 is a cross-sectional view of the main steam piping arrangement and hot reheat piping arrangement of FIG. 2.
  • connection refers to a connection, which may be direct or indirect.
  • the connection is not necessarily a mechanical attachment.
  • “fluidly coupled” or“fluid communication” refers to an arrangement of two or more features such that the features are connected in such a way as to permit the flow of fluid between the features and permits fluid transfer.
  • Embodiments of the invention relate to a system and method for accommodating thermal displacements of components in a power generation plant.
  • the system includes a boiler having a superheater, a first header fluidly coupled to an outlet of the superheater and being configured to receive steam from the superheater, a turbine elevated to a location generally adjacent to the outlet of the superheater, and a main steam piping system extending from the first header to the turbine and being configured to direct a flow of the steam from the first header to the turbine.
  • the system further includes a flexible portion upstream from the first header allowing located between the first header and the boiler and operative to flex in response to to thermal displacement of the boiler.
  • the flexible portion may comprise a plurality of flexible or bendable tubes that operatively couple corresponding tubes of the superheater in fluid communication with the first header.
  • the system 10 includes a coal fired pressurized boiler 12 to which lead a feedwater line 14 and a steam line 16 are input.
  • the boiler 12 may take any configuration known in the art and includes, among other things, a reheater 13, an evaporator, and a superheater 15 for heating steam at high pressure.
  • the reheater, evaporator and superheater are formed as tube bundles (i.e., each inherently comprising a plurality of individual tubes) within the boiler 12 and each have an inlet and an outlet, as known in the art. As illustrated in FIG.
  • the outlet of the reheater 13 is fluidly coupled to a hot reheat outlet header 21 positioned outside the boiler body on a front side thereof, while the outlet of the superheater 15 is fluidly coupled to a main steam outlet header 19 which is likewise positioned outside the boiler body on a front side thereof.
  • Main steam piping 18 and hot reheat piping 20 (also referred to herein as“main steam pipe system” and“hot reheat pipe system”, respectively) lead from the main steam outlet header 19 and the hot reheat outlet header 21 , respectively, to a high- temperature high-pressure steam turbine HP 1 and a high-temperature intermediate- pressure steam turbine IP 1 , respectively.
  • a further piping system 22 feeds exhaust gas from boiler 12 to a high- pressure gas turbine HPT.
  • the three turbines HPT, HP1 and IP1 together with a high-pressure compressor HPC and a generator Gl , on rotor 25, form a turbo train which is arranged vertically and parallel with boiler 12.
  • the high-temperature steam turbines HP1, IP land high-pressure gas turbine HPT operate at high temperatures since their components are manufactured from nickel-based or other specialty alloy materials.
  • Main steam piping system 18, hot reheat piping system 20, and piping system 22, are also manufactured from nickel-based or other specialty alloy materials.
  • These piping systems 18, 20, 22 each comprise a plurality of pipes that may be run over a minimal length due to the vertical arrangement of the turbines parallel with the boiler. Their minimal length provides a significant cost saving in view of the high costs of the nickel-based or other specialty alloy materials.
  • the turbines may simply be elevated from the ground level so as to be in close association with the steam outlets of the boiler (namely, the outlets of the headers from which the turbines are fed).
  • feedwater is fed via line 14 into boiler 12, and is there heated in the evaporator and superheater to a temperature in excess of, for example, 700° C at a pressure of 350 bar and, more particularly, to a temperature between about 700° C and 820° C at a pressure of between about 350 bar and 425 bar.
  • the superheated steam is fed to the main steam piping system 18 via the header 19, and to high temperature high pressure steam turbine HP1 , where the steam is expanded.
  • the expanded steam which still has a temperature in excess of at least 600° C., for example, is then fed via a line 24 to a conventional high-pressure steam turbine HP2.
  • a conventional low-pressure steam turbine LP2 and a second generator G2 this forms a conventional turbo train arranged on a second rotor 26.
  • the steam expanded in conventional high-pressure steam turbine HP2 is returned via a line 16 (e.g., cold reheat piping) to boiler 12, where it is again heated in the reheater 13.
  • This reheated steam is fed to the hot reheat piping system 20 via the header 21 , into high temperature intermediate pressure steam turbine IP 1.
  • the steam expanded in IP 1 is fed via a line 28 to conventional intermediate -pressure steam turbine IP2 and there further expanded and further expanded in the series connected low-pressure steam turbine LP2. Finally, the steam is fed to a condensation and feedwater heating facility 50.
  • Piping system 22 feeds exhaust gas from boiler 12 via a high -temperature filter 30 to high pressure gas turbine HPT, in which the exhaust gas is expanded.
  • the expanded exhaust gas is then fed to a series connected controllable low-pressure gas turbine LPT arranged on a separate rotor.
  • the exhaust gas is further expanded therein and then fed to a selective catalytic reducer SCR in order to reduce nitrogen oxides.
  • the exhaust gas may then be fed to a series of exhaust gas heated feedwater heaters (not shown).
  • FIGS. 2-5 detailed views of the main steam piping system 18 and hot reheat piping system 20 is shown.
  • the turbine e.g., high-pressure high temperature steam turbine HP1
  • HP1 high-pressure high temperature steam turbine
  • the intermediate -pressure turbine IP1 may be elevated so that the hot reheat inlet to the turbine IP 1 is generally adj acent to the hot reheat outlet header 21.
  • the main steam outlet header 19 and hot reheat outlet header 21 are therefore positioned on the front side of the boiler such that the outlets of the headers and the inlets of the turbine are in close proximity to one another.
  • the turbines may be configured to rotate about a substantially horizontal axis 40, although the vertical arrangement described above may also be utilized without departing from the broader aspects of the invention.
  • the turbine may be rotated 90 degrees relative to the conventional arrangement (i.e., rotation axis 40 in the direction of boiler, as shown in FIG. 2) to further position the inlet of the turbine closer to the boiler 12, and to achieve a symmetrical arrangement.
  • the turbines are disposed elevated with respect to the ground so that the length of the main steam piping 18 and hot reheat piping 20 (which fluidly connects the main steam outlet header 19 and hot reheat outlet header 21 to the turbine) can be minimized.
  • the main steam piping system 18 and hot reheat piping system 20 may be outfitted with main steam bypass valves 42 and hot reheat bypass valves 44 to selectively control the flow of steam therethrough, as shown in FIGS. 2-4.
  • the main steam outlet header 19 and hot reheat outlet header 21 are separated from the boiler, and fluidly coupled to the heat exchanger tubing of the superheater 15 and reheater 13, respectively, within the boiler (which absorb heat from the combustion gases passing through the boiler to generate steam) to receive steam and exhaust gasses therefrom.
  • the system 100 includes header connecting tube arrays 46 and 48 that fluidly couple the tube bundles of the superheater 15 and the tube bundles of the reheater 13, respectively, to the main steam outlet header 19 and hot reheat outlet header 21 , respectively.
  • the connecting tube arrays 46, 48 each comprise plurality of relatively thin- walled, small diameter tubes 45, 47 (in contrast to the thick- walled, relatively large diameter pipes of the main steam piping 18 and hot reheat piping 20).
  • the tubes 45, 47 of the connecting tube arrays 45, 48 may be arranged to comprise respective horizontal tube portions 52 in fluid communication with respective vertical tube portions 54.
  • the respective horizontal tube portions 52 of the tubes 45, 47 will be elongate, defining a generally horizontal longitudinal axis therethrough; and the respective vertical tube portions 54 of tubes 45, 47 will be elongate and define a generally vertical longitudinal axis therethrough.
  • the tubes 45, 47 of the tube arrays 46, 48 will have thinner walls and smaller diameters than the headers 19, 21 and the piping 18, 20, 22, and therefore the tubes 45, 47 of the tube arrays 46, 48 will be more readily flexible in response to heating and cooling of the system 10 than the headers 19, 21 and the piping 18, 20, 22.
  • the connecting tubes 45, 47 of the connecting tube arrays 46, 48 are arranged extending from, and in fluid communication with,
  • corresponding heat exchanger tubes of the superheater 15 and reheater 13 for example by welding or mechanically coupling, and may generally have the same wall thickness and diameter as the heat exchanger tubes of the superheater and reheater.
  • the tubes 45, 47 of the connecting tube arrays 46, 48 may each include a generally horizontal tube portion 52 and a generally vertical tube portion 54.
  • the generally horizontal tube portion 52 and the generally vertical tube portion 54 cooperatively define at least one flexible coupling tube portion 56 of system 10.
  • the positions of the main steam outlet headers 19 and hot reheat outlet headers 21 are illustrated in relation to a conventional position of the main steam outlet headers 19 and hot reheat outlet headers 21 , which are indicated by reference numerals 60 and 70, respectively.
  • this arrangement allows for relatively short lengths to be used for the main steam piping 18 and hot reheat piping 20, while at the same time accommodating, or allowing for, thermal expansion during boiler operation, as discussed hereinafter.
  • the headers 19, 21 are located outside the main steel structure of the boiler 12, and are thus essentially‘decoupled’ or separated from the boiler 12.
  • the connecting tube arrays 46, 48 extend from the heat exchanger tube bundles within the boiler 12 (e.g., the superheater 15 and reheater 13, respectively), and are fluidly connected to the headers 19, 21 outside the main structure of the boiler 12.
  • connecting tube arrays 46, 48 comprise relatively thin-walled tubes having small diameters (e.g., about 1.5 inches in one embodiment)
  • these tubes 45, 47 are operative to more readily elastically bend and flex than typical piping having thicker walls and larger diameters that is conventionally fluidly coupled to the heat exchanger tube bundles.
  • the horizontal header connecting tube portions 52 of the connecting tube arrays 46, 48 allow for thermal expansion of the boiler in the vertical direction, as they are able to deflect upwardly and downwardly as the boiler expands and contracts in the vertical direction.
  • the vertical header connecting tube portions 54 of the connecting tube arrays 46, 48 allow for thermal expansion of the boiler in the horizontal direction and for thermal expansions from the turbine(s), piping 18, 20, and outlet headers 19, 21, as they are able to deflect laterally as these components expand and contract laterally.
  • the outlet headers 19, 21 may be supported on z- stops, but they are otherwise able to expand horizontally towards the boiler due to the thermal expansion of the turbine and piping 18, 20.
  • the main steam outlet header 19 and/or hot reheat outlet header 21 are moved outside of the main enclosing walls of the boiler 12 and fixedly integrated with the main steam piping system 18 and hot reheat piping 20 system, respectively.
  • the system 10 includes a first flexible coupling tube portion 56 disposed upstream from the first header 19 is fluidly coupled between the first header 19 and the boiler 12 operative to flex relative the first header 19 and the boiler 12 in response to a thermal displacement of the boiler.
  • system 10 may include a second flexible coupling tube portion 56 upstream from the second header 21 operative to flex relative the second header 21 and the boiler 12 in response to a thermal displacement of the boiler.
  • the flexure provided by relatively small diameter tubes 45, 47 of the tube arrays 46, 48 accommodate thermal expansion and contraction of system components, minimizing or preventing the buildup of stresses in the piping 18, 20 system.
  • the configuration of the system of the invention namely, the particular arrangement of the main steam piping system, hot reheat piping system, outlet headers and connecting tube arrays discussed above, allows the headers 19, 21 , critical piping systems and turbines to move/expand relative to the boiler 12, and vice versa.
  • this configuration arranges at least one flexible coupling tube portion 56 of the system located upstream from the headers 19, 21 (between the superheater/reheater and the headers 19, 21 , indicated generally by flexible coupling tube portion 56 in FIG.
  • header connecting tubes have been described herein as being able to bend or flex to provide flexibility to the system to accommodate relative movement between the boiler and headers as a result of their relatively thin-walled and/or smaller diameter construction as compared to the relatively thick- walled and/or larger diameter main steam and hot reheat piping, it is contemplated that the ability to provide relative movement between the boiler and headers may be achieved by other means as well.
  • a greater flexing or bending ability may be provided in the header connecting tubes as compared to the main steam and hot reheat piping by varying the parameters of the header connecting tubes as compared to the main steam and hot reheat piping. Varying the parameters may include for example, providing the header connecting tubes with thinner walls, smaller diameter, different material selection, or other different material properties that facilitate bending as compared to the main steam and hot reheat piping.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Control Of Turbines (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)

Abstract

L'invention concerne un système pour une centrale de production d'énergie. Ledit système comprend une chaudière ayant un surchauffeur, un premier collecteur couplé de manière fluidique à une sortie du surchauffeur et configuré pour recevoir de la vapeur provenant du surchauffeur, une turbine élevée à un emplacement généralement adjacent à la sortie du surchauffeur, et un système de tuyauterie de vapeur principal s'étendant du premier collecteur à la turbine et étant conçu pour diriger un écoulement de vapeur du premier collecteur à la turbine. Le système comprend en outre une partie flexible en amont du premier collecteur fonctionnant pour avoir de la souplesse par rapport au premier collecteur et à la chaudière en raison d'une dilatation thermique de la chaudière.
PCT/EP2018/082856 2017-11-28 2018-11-28 Système et procédé pour permettre une dilatation thermique dans une centrale de production d'énergie WO2019106019A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US16/765,201 US20200284428A1 (en) 2017-11-28 2018-11-28 System and method for accomodating thermal displacement in a power generation plant
CN201880071351.8A CN111295499A (zh) 2017-11-28 2018-11-28 用于适应发电站中的热位移的系统和方法
EP18811516.6A EP3717751A1 (fr) 2017-11-28 2018-11-28 Système et procédé pour permettre une dilatation thermique dans une centrale de production d'énergie

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201762591471P 2017-11-28 2017-11-28
US62/591,471 2017-11-28

Publications (1)

Publication Number Publication Date
WO2019106019A1 true WO2019106019A1 (fr) 2019-06-06

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ID=64559689

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2018/082856 WO2019106019A1 (fr) 2017-11-28 2018-11-28 Système et procédé pour permettre une dilatation thermique dans une centrale de production d'énergie

Country Status (4)

Country Link
US (1) US20200284428A1 (fr)
EP (1) EP3717751A1 (fr)
CN (1) CN111295499A (fr)
WO (1) WO2019106019A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7406942A (nl) * 1974-04-29 1975-10-31 Sulzer Ag Inrichting voor het afsteunen van een ver- schuifbare massa op een vast freem.
EP0601262A1 (fr) * 1992-12-10 1994-06-15 ABB Management AG Conduit soumis à des dilatations différentielles
EP1577507A1 (fr) * 2004-03-01 2005-09-21 Alstom Technology Ltd Centrale d'énergie avec un foyer à charbon
DE102006007238A1 (de) * 2006-02-15 2006-07-27 Rwe Power Ag Rohrleitungsanordnung
DE102006007239A1 (de) * 2006-02-15 2006-08-10 Rwe Power Ag Befestigungseinrichtung für sich verschiebende Rohrleitungen
US20080264358A1 (en) * 2007-04-26 2008-10-30 Harth George H End Support Configuration for Steam Tubes of a Superheater or Reheater
CN107091127A (zh) * 2017-04-22 2017-08-25 冯煜珵 一种机炉紧凑布置的管道连接系统

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7406942A (nl) * 1974-04-29 1975-10-31 Sulzer Ag Inrichting voor het afsteunen van een ver- schuifbare massa op een vast freem.
EP0601262A1 (fr) * 1992-12-10 1994-06-15 ABB Management AG Conduit soumis à des dilatations différentielles
EP1577507A1 (fr) * 2004-03-01 2005-09-21 Alstom Technology Ltd Centrale d'énergie avec un foyer à charbon
DE102006007238A1 (de) * 2006-02-15 2006-07-27 Rwe Power Ag Rohrleitungsanordnung
DE102006007239A1 (de) * 2006-02-15 2006-08-10 Rwe Power Ag Befestigungseinrichtung für sich verschiebende Rohrleitungen
US20080264358A1 (en) * 2007-04-26 2008-10-30 Harth George H End Support Configuration for Steam Tubes of a Superheater or Reheater
CN107091127A (zh) * 2017-04-22 2017-08-25 冯煜珵 一种机炉紧凑布置的管道连接系统

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Publication number Publication date
US20200284428A1 (en) 2020-09-10
EP3717751A1 (fr) 2020-10-07
CN111295499A (zh) 2020-06-16

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