WO2015135789A1 - Dispositif d'amenée de gaz chaud et utilisation de sable de fonderie - Google Patents

Dispositif d'amenée de gaz chaud et utilisation de sable de fonderie Download PDF

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Publication number
WO2015135789A1
WO2015135789A1 PCT/EP2015/054350 EP2015054350W WO2015135789A1 WO 2015135789 A1 WO2015135789 A1 WO 2015135789A1 EP 2015054350 W EP2015054350 W EP 2015054350W WO 2015135789 A1 WO2015135789 A1 WO 2015135789A1
Authority
WO
WIPO (PCT)
Prior art keywords
gas
flow path
molding sand
gas turbine
hot
Prior art date
Application number
PCT/EP2015/054350
Other languages
German (de)
English (en)
Inventor
Martin Hecklau
Nils Herzog
Susanna Ott
Immanuel Schmidt-Streckenbach
Christian Scholz
Dirk Springborn
Original Assignee
Siemens Aktiengesellschaft
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 Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO2015135789A1 publication Critical patent/WO2015135789A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/28—Supporting or mounting arrangements, e.g. for turbine casing
    • F01D25/285—Temporary support structures, e.g. for testing, assembling, installing, repairing; Assembly methods using such structures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/30—Exhaust heads, chambers, or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2230/00—Manufacture
    • F05D2230/90—Coating; Surface treatment

Definitions

  • the invention relates to a device for guiding a hot gas, wherein the device comprises at least one wall for ⁇ at least partially limiting a hot gas flow-through flow path. Furthermore, the invention relates to the use of molding sand.
  • Turbine unit is guided as exhaust gas via other channels to other Ein ⁇ directions.
  • the other devices may be, for example, an exhaust stack or a heat recovery steam generator, in the latter, the heat energy present in the exhaust gas is converted into superheated steam for energy production.
  • channels formed from metal are used, which are then designed, for example, as an exhaust gas diffuser or as an exhaust gas line.
  • metal as the material of the channels is ensured that the ver ⁇ applied material can withstand the temperatures of the hot exhaust gas or DAU ⁇ nently.
  • the exhaust gas temperatures of a stationary gas turbine today are on the order of about 650 ° C and beyond.
  • temperature-resistant metals or alloys are comparatively needed, ver ⁇ same manner is costly.
  • the high exhaust gas temperatures cause the metallic components to expand during operation, so that, in particular, the transition points of the exhaust gas ducts to other devices are designed to be tolerant of expansion and, if necessary, to be sealed.
  • the strain-tolerant installation and fastening of the exhaust gas ducts as well as the Therefore, seals require expensive constructions, which is undesirable.
  • gas turbines are manufactured and operated in different sizes and performance classes. Some manufacturers of such gas turbines have a test and test stand to test and test these gas turbines before their delivery from ⁇ . It is also known to test prototypes of gas turbines before sale or delivery. When changing from a gas turbine to a Ren walls ⁇ type of the Ab ⁇ gas-carrying channels to the respective geometric constructive ⁇ tion are in the inspection and test prior therefore adapt to the next in the inspection and test prior to erprobenden gas turbine. These adjustments may prove comparatively expensive when both the exhaust diffuser and the exhaust pipe need to be changed for each gas turbine to be re-tested. However, since the test operation is always limited in time, there is a desire to keep the expenses for adapting the exhaust pipes both constructive and cost as low as possible.
  • the object of the invention is therefore to provide a device provided exclusively for guiding a hot or exhaust gas, which on the one hand is comparatively simple to construct and, on the other hand, is also inexpensive.
  • a device for guiding a hot or exhaust gas wherein the at least partially formed from molding sand at least one wall of this apparatus.
  • molding sand is proposed as a (basic) material of a wall of a hot or exhaust gas-conducting housing component for a gas turbine, an exhaust gas diffuser for a gas turbine and / or an exhaust pipe for a gas turbine.
  • the invention relates to devices whose function is mainly, preferably exclusively, to lead hot (waste) gases.
  • the invention is based on the recognition that to satisfy the requirements ⁇ gen to the durability and service life of said hot or exhaust gas carrying devices in a test and test stand are substantially lower than in a commercial application, in which the said devices for years without errors and certainly possible should be operated maintenance-free.
  • the invention solves the self ⁇ understandability that hot gas components must be principally made of metal or a temperature-resistant alloy.
  • molding sand can be used to form the wall, which limits the flow space of the hot or exhaust gas and consequently the ⁇ occur in the flow path Resists flow forces.
  • this foundry sand is exposed to temperatures far above the melting point of metals. Consequently, it is also sufficiently temperature resistant for the new use.
  • the molding sand is also suitable for the use according to the invention.
  • the molding sand has hitherto been used only for casting relatively detailed shapes, such as a church bell or a pressure jacket of a turbine.
  • this shape is geometrically comparatively simple: approximately cylindrical or conical or frustoconical, depending on the required flow path shape of the device.
  • the invention provides that the erfindungsge ⁇ Permitted device only once for a limited period of time, namely for the duration of the test and test operation of the gas ⁇ turbine, is used. Nonetheless, it is not concluded that the device according to the invention can also be used in commercially used devices whose service life is much longer than the test and test operation.
  • Another advantage of the invention is that due to the high density of the molding sand, this sound- insulating effect simultaneously, without further components are required for it. Furthermore, the molding sand is reusable, which in particular for use in a test and test stand of
  • the acquisition amount of new molding sand to Ge ⁇ staltung a new hot or exhaust gas-carrying device can be kept comparatively small.
  • natural sand or a quartz sand could be used as foundry sand.
  • a synthetic or natural binder is also included in the foundry sand.
  • the Minera ⁇ logy of the binder can be based on bentonite and other minerali ⁇ -specific components.
  • clay-based binders may also be used, for example, illite and kaolin, but also smectites.
  • the surface of the wall of molding sand facing the flow space of the hot gas is at least partially, preferably completely covered with a protective layer which is more resistant to erosion.
  • the layer thus extends the life of the device, as it is erosion resistant than the molding sand itself.
  • the layer of foundry sand similar to molds, could be applied to said area in the so-called “slurry” process, which is called “sizing” in casting molds.
  • slurry which is called "sizing” in casting molds.
  • the degree of firmness of the layer should be comparatively high, so that the erosion losses during use are particularly low.
  • liquids are on, which are relatively complex in the composition, but have the ⁇ still the highest degree of setting.
  • the wall has at least one non-flow-limiting side on which a preferably metallic shell is provided as Hül ⁇ le for the molding sand or as a part of the shell.
  • This cover protects the molding sand from accidental and un ⁇ intentional damage to its exterior, which maintains the integrity of the device upright.
  • the sheath can also be reinforced inside or outside with stiffening ribs or struts.
  • the flow path includes an upstream port and one of the single ström healthcareen opening opposite outflow Publ ⁇ voltage, wherein the contours of the two openings are different. Consequently, the contour of the flow path changes ent ⁇ long its longitudinal extent, so that the device is designed quasi as a transition piece.
  • Such Studentsgangsstü ⁇ blocks are often very difficult to manufacture in metal, but this is much easier and more cost effective with the use of molding sand.
  • the device is equipped as a housing component of a gas turbine or exhaust gas diffuser of a gas turbine or exhaust pipe of a gas turbine.
  • a housing component of a gas turbine is to be understood as such, which is structurally still to be assigned to the gas turbine itself, but is provided for conducting the hot or exhaust gas of the gas turbine.
  • the exhaust gas diffuser of a gas turbine and the exhaust gas line of a gas turbine are structurally separate from the gas turbine.
  • FIG. 1 shows a perspective view schematically of a device for guiding a hot gas.
  • the single figure shows a three-dimensional Thomas appetizer a device 10 for guiding a hot gas.
  • the device 10 is substantially cube-shaped in the embodiment shown. It can of course also be cuboid or cylindrical.
  • the device 10 comprises, according to the embodiment shown ⁇ example, a shell 18 which is made of a simple metallic wall.
  • the shell 18 serves only as a shell for molding sand 20.
  • two opposing openings 14, 16 are provided, which are fluidically connected to each other.
  • the flow path 22 extending between the two openings 14, 16 serves to guide a hot or exhaust gas from one opening 14 to the other opening 16.
  • a hole 12 penetrating the device 10 is present.
  • the inflow-side opening 14 may have a different contour than the outflow-side opening 16. This embodiment is particularly suitable when the device 10 is to connect a cross-sectionally circular, downstream end of the gas turbine to a cross-sectionally square inflow-side end of a heat recovery steam generator.
  • the layer may also be a ceramic protective layer.
  • a case 18, which may be reinforced with struts, must first be produced.
  • This shell 18 may be made of a less temperature-resistant material than the molding sand 20, since prevail during operation of the pre ⁇ direction 10 on the outside of the shell 18 ambient temperatures ⁇ tures.
  • the shell 18 may be bricked or made of metal.
  • the shell 18 is opened at the locations of the latest, ⁇ direct inflow and outflow openings 14, 16th In the casing 18, a flow path 22 representing core is used, the same time the openings 14, 16 includes ⁇ ver. Subsequently, in the shell 18 with the lid 30 open from above molding sand 20 into the device 10 is filled ⁇ .
  • a gradual filling of molding sand 20 with intermediate compression of the hitherto filled molding sand 20 is also possible.
  • the lid 30 is subsequently closed and the core representing the flow path 22 is removed.
  • the hole 12 is then completely surrounded by the molding sand 20, which then constitutes a wall 22 bordering the flow path .
  • the surface 24 of the molding sand, which is thus facing the flow path 22 is sized, that is, a sizing liquid or paste is applied to the surface 24, which then becomes an erosion protection layer permanent part of the device 10.
  • the device 10 may be divisible in half, so that the device 10 then comprises two walls essentially consisting of molding sand 20 which together define the flow path 22. If the flow path 22 is frusto-conical in shape, the device 10 may be, for example, a diffuser for hot or exhaust gas.
  • the invention relates to a flow path 22 for the hot gas or exhaust gas of a gas turbine comprehensive Vor ⁇ direction 10, which can be comparatively simple and cost ⁇ low and finished in a short time and possibly designed for a comparatively short service life.
  • the device 10 essentially consists of molding sand 20, and the molding sand 20 limits the flow path 22 or serves as a substrate resisting the flow forces of a layer 26 delimiting the flow path 22.

Abstract

La présente invention concerne un dispositif (10) qui comprend un chemin d'écoulement (22) destiné au gaz chaud ou au gaz d'échappement d'une turbine à gaz et qui peut être fabriqué de façon relativement simple, peu onéreuse et en un temps court et qui est éventuellement conçu pour une durée de fonctionnement relativement courte. Pour cela, selon l'invention, le dispositif (10) est formé sensiblement à partir de sable de fonderie (20) et le sable de fonderie (20) délimite le trajet d'écoulement (22) ou sert de substrat d'une couche (26) délimitant le trajet d'écoulement (22).
PCT/EP2015/054350 2014-03-13 2015-03-03 Dispositif d'amenée de gaz chaud et utilisation de sable de fonderie WO2015135789A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP14159352.5A EP2918791A1 (fr) 2014-03-13 2014-03-13 Dispositif prévu pour guider un gaz chaud et utilisation de sable de moulage
EP14159352.5 2014-03-13

Publications (1)

Publication Number Publication Date
WO2015135789A1 true WO2015135789A1 (fr) 2015-09-17

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2015/054350 WO2015135789A1 (fr) 2014-03-13 2015-03-03 Dispositif d'amenée de gaz chaud et utilisation de sable de fonderie

Country Status (2)

Country Link
EP (1) EP2918791A1 (fr)
WO (1) WO2015135789A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5462088A (en) * 1992-10-26 1995-10-31 Societe Anonyme Dite: European Gas Turbines Sa Gas turbine exhaust diffuser
EP1262666A2 (fr) * 2001-05-30 2002-12-04 M & I Heat Transfer Products Ltd. Structures pour l'entrée et pour la sortie d'une turbine
US20040045692A1 (en) * 2002-09-10 2004-03-11 Redemske John A Method of heating casting mold
US20040060681A1 (en) * 2000-11-24 2004-04-01 Shigeo Nakai Sublimation pattern casting method
US20120097357A1 (en) * 2009-07-31 2012-04-26 Muneyoshi Terashima Casting unit and casting method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5462088A (en) * 1992-10-26 1995-10-31 Societe Anonyme Dite: European Gas Turbines Sa Gas turbine exhaust diffuser
US20040060681A1 (en) * 2000-11-24 2004-04-01 Shigeo Nakai Sublimation pattern casting method
EP1262666A2 (fr) * 2001-05-30 2002-12-04 M & I Heat Transfer Products Ltd. Structures pour l'entrée et pour la sortie d'une turbine
US20040045692A1 (en) * 2002-09-10 2004-03-11 Redemske John A Method of heating casting mold
US20120097357A1 (en) * 2009-07-31 2012-04-26 Muneyoshi Terashima Casting unit and casting method

Also Published As

Publication number Publication date
EP2918791A1 (fr) 2015-09-16

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