EP2127764A1 - Procédé et dispositif de nettoyage d'un composant haute température - Google Patents

Procédé et dispositif de nettoyage d'un composant haute température Download PDF

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Publication number
EP2127764A1
EP2127764A1 EP08009631A EP08009631A EP2127764A1 EP 2127764 A1 EP2127764 A1 EP 2127764A1 EP 08009631 A EP08009631 A EP 08009631A EP 08009631 A EP08009631 A EP 08009631A EP 2127764 A1 EP2127764 A1 EP 2127764A1
Authority
EP
European Patent Office
Prior art keywords
temperature component
nutrient solution
burner
bacteria
carrying
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.)
Withdrawn
Application number
EP08009631A
Other languages
German (de)
English (en)
Inventor
Malte Dr. Blomeyer
Gilbert Braun
Christoph Buse
Andreas Dr. Böttcher
Andre Kluge
Tobias Krieger
Ralf Liedtke
Adam Zimmermann
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.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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 AG, Siemens Corp filed Critical Siemens AG
Priority to EP08009631A priority Critical patent/EP2127764A1/fr
Publication of EP2127764A1 publication Critical patent/EP2127764A1/fr
Withdrawn legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
    • F23D2900/00002—Cleaning burner parts, e.g. burner tips

Definitions

  • the present invention relates to a cleaning of a high-temperature component, in particular the components of a power plant. Furthermore, the invention also relates to a device for carrying out the method.
  • Gas turbine combustors include a plurality of tubular fuel rail systems configured for different fuels. Each burner has a first end to which fuels can be supplied to the burner via different connections. The first end of the burner opposite the second end of the burner opens in the installed state in the combustion chamber of the gas turbine. The second end is usually provided with a plurality of nozzle systems from which the fuel or a fuel-air mixture can be injected into the combustion chamber. For fastening the burner to a combustion chamber wall, a burner flange encompassing the burner is provided between the first and the second end, which can be screwed to the combustion chamber wall.
  • Gas turbine combustors include a plurality of tubular fuel rail systems configured for different fuels. Each burner has a first end to which fuels can be supplied to the burner via different connections. The first end of the burner opposite the second end of the burner opens in the installed state in the combustion chamber of the gas turbine. The second end is usually provided with a plurality of nozzle systems from which the fuel or a fuel-air mixture can be injected into the combustion chamber. For fastening the burner to a combustion chamber wall, a burner flange encompassing the burner is provided between the first and the second end provided, which is screwed to the combustion chamber wall.
  • a mobile flushing unit is in the EP 1 574 675 A2 described. This includes flexible hoses to be attached to opposite ends of a workpiece. Compressed air and a cleaning fluid can then be pumped through the flexible hoses and the interposed workpiece.
  • US 4,995,915 discloses a system for cleaning dirty gas firing nozzles in gas turbines in which a chemical cleaning agent is added to the gas during operation of the gas turbine.
  • the DE 10 2005 009 724 B3 relates to a cleaning method for incinerators having at least one combustion chamber for post combustion of combustion gases, wherein at least one jet of air is injected into the combustion chamber, to improve the afterburning by a turbulence of the combustion gases.
  • the air jet of the DE 10 2005 009 724 If necessary, a twist is occasionally mediated. If the injected air jet already receives a twist for the purpose of better mixing imparted, the spin is thus additionally generated for cleaning purposes.
  • This object is achieved with respect to the method according to the invention by specifying a method for cleaning a high-temperature component, in particular components of a power plant, wherein the high-temperature component is treated with sulfur bacteria.
  • Sulfur-oxidizing bacteria through their oxidative energy metabolism processes, contribute significantly to converting sparingly soluble sulfides such as copper sulfide into water-soluble leachable sulfates.
  • the sulfur bacteria are therefore autotrophic bacteria that oxidize hydrogen sulfide and other reduced sulfur compounds, such as thiosulfate, to elemental sulfur or sulfate. Most of them can also oxidize elemental sulfur to sulphate.
  • the invention recognizes that the bacteria eat only the sulfur and its sulfide compounds but leave the metal untouched. The invention has further recognized that this property is excellent for the cleaning of a high temperature component.
  • the sulfur bacteria are preferably supplied by means of a nutrient solution.
  • the nutrient solution is tempered. This ensures a particularly good survival and / or reproduction of the bacteria.
  • nutrient solution is circulated in a suitable container, in particular a reactor. This ensures a particularly good distribution of the bacteria in the nutrient solution.
  • the high-temperature component is immersed in the container. This is especially suitable for easily removable parts.
  • the high-temperature component may itself or partially represent the container itself. This is suitable, for example, for the burner itself.
  • the nutrient solution can be supplied via an existing feed and then drained via an already existing drain. But it is also possible to immerse the burner as such, for example, without removing individual components in such a nutrient solution.
  • the nutrient solution flows through the high-temperature component. This is done in such a way that the component flows through and flows around as much as possible so that the bacteria can process the adhering sulfur / sulfur sulfide residue. Thus, now hard to reach places such as undercuts can be cleaned.
  • the sulfur bacteria are at least partially chemolithoautotrophic sulfur bacteria. These bacteria meet their energy needs through the exergonic sulfur oxidation.
  • the sulfur bacteria are at least partially Beggiatoa and / or Thiomargarita namibiensis and / or endolithically living bacteria.
  • the Beggiatoa is multicellular, filamentous, aerobic and not acidophilic.
  • Endolithe bacteria gain their vital energy from the conversion of inorganic compounds of the colonized rock, such as sulfur, iron and manganese compounds, but in some cases also minerals of uranium, arsenic and others.
  • the Thiomargarita namibiensis gains its energy from the conversion of inorganic substances, in particular sulfides with nitrate, which they store in high concentration in their cell interior. In contrast to most sulfur bacteria, they can also react with sulfides under certain conditions with oxygen, so they are optionally aerobic. All of these bacteria can be used because of their properties.
  • the sulfur bacteria are at least Acidithiobacillus thiooxidans.
  • the Acidithiobacillus thiooxidans is unicellular, aerobic and acidophilic. Acidithiobacillus thiooxidans oxidized Sulfur compounds. This also leads to the formation of sulfurous acid and acid. Acidithiobacillus thiooxidans is particularly good due to its size and the fact that it does not form threads or balls. They are used industrially, for example, in bioleaching, a special metal extraction process in which metals are extracted from ores by bacterial oxidations. The bacteria serve as "biocatalysts".
  • the object is achieved with respect to the device according to the invention by specifying a device for carrying out the method with a high-temperature component and a Trobreitungsstrom.
  • a device for carrying out the method with a high-temperature component and a Trobreitungsstrom.
  • the Aufbreitungsstrom can now be made for the chemical disposal of the degradation products, for example, sulfuric acid.
  • an exchange device is present. Through this, the nutrient solution can be supplied or removed.
  • an oxygenator is present. This enriches nutrient solution with oxygen, thus supplying the bacteria with necessary oxygen.
  • a circulation device for circulating the nutrient solution is present. This ensures that the nutrient liquid with the bacteria are brought to the locations in the component which have deposits.
  • a tempering device for tempering the nutrient solution is present. This creates a necessary for the bacteria habitat condition.
  • the circulation device (53) and / or the temperature control device (54) are connected in a detergent circuit.
  • the detergent circuit an exchange of the cleaning liquid, in particular the nutrient fluid include. This can be done using the replacement device.
  • the detergent cycle can also represent only the mere movement (circulation) of the nutrient fluid together with the bacteria.
  • a reactor is present. In this targeted operations can take place under defined conditions.
  • the reactor is a bioreactor in which specially grown microorganisms or cells are cultured under optimal conditions in a nutrient medium in order to obtain either the cells themselves, parts of them or one of their metabolites.
  • the gas turbine 1 has a compressor 2 for combustion air, a combustion chamber 4 and a turbine 6 for driving the compressor 2 and a generator or a work machine, not shown, and an annular space 24 for transferring the hot gas M from the combustion chamber 4 to the turbine 6.
  • supplied air L is compressed.
  • the turbine 6 and the compressor 2 are arranged on a common, also called turbine rotor turbine shaft 8, with which the generator or the working machine is connected, and which is rotatably mounted about its central axis.
  • the turbine 6 has a number of the turbine shaft 8 connected, rotatable blades 12.
  • the blades 12 are arranged in a ring on the turbine shaft 8 and thus form a number of blade rows.
  • the rotor blades 6 serve to drive the turbine shaft 8 by momentum transfer from the hot medium flowing through the turbine 6, the working medium, for example the hot gas M.
  • the guide vanes 14, serve to guide the flow of the working fluid, for example the Hot gases M.
  • resulting hot gas M flows in the flow direction 38 of the combustion chamber 4 through an annular space 24 to the turbine 6.
  • the annular space 24 is formed a substantially homogeneously mixed stream of the working medium, for example, a hot gas M from.
  • the combustion chamber 4 has a combustion chamber outlet section 37.
  • the nutrient solution can thus be supplied via existing feeds to the combustion chamber and be discharged via existing processes in the combustion chamber outlet section 37.
  • FIG. 2 shows the apparatus for performing the method by means of a cleaning bath in a suitable container (reactor 50).
  • reactor 50 sulfur-digesting bacteria live in a nutrient solution.
  • the high-temperature component here for example the burner 52 or parts of the burner 52, are now at least partially immersed in the solution.
  • the container 50 is connected to a tempering device 54, so that the nutrient solution has a temperature necessary for the bacteria.
  • the solution together with the bacteria is circulated in the container by means of a circulating device 53, so that the burner 52 flows through or flows around as much as possible.
  • This allows the bacteria to retain the sulfur / sulfur sulfide residue adhered to the component, i. process the deposits or soiling.
  • the nutrient solution In order to supply the bacteria with the necessary oxygen, the nutrient solution must be saturated by a corresponding oxygenator (not shown).
  • a suitable Nähratessaufleungsstrom 55 is provided for a chemical disposal of the degradation products (sulfuric acid etc).
  • the nutrient solution treatment plant 55 is connected to the reactor 50 via an exchange device.
  • the method described here is particularly suitable for the burner of a gas turbine or the supply or discharge lines to the burner. But also blades or other burner components can be cleaned with this method.
  • the gas-carrying components of other power plants for example CCGT, which have the same problem, can be cleaned with the method according to the invention and the device according to the invention.
  • the process can also be used in industrial gas turbines and their components.
  • the inventive method and the device can be dispensed with corrosive or pungent cleaning agent.
  • the nozzle openings increase and there is a change in the total throughput of the mixture used, for example, the air / fuel gas and or fuel oil mixture in the burner.
  • the acid attack it is also possible for etches to emerge from smooth contours, for example at the nozzle openings, which in turn results in a change in the flow.
  • Another significant advantage is the renunciation of new components or a manual cleaning. Both would have enormous costs both through the Components in itself as well as by the long downtime result. It is advantageous that by the quick and easy implementation of the method by means of the device a more frequent removal of deposits is possible whereby now the emission limits can be met much easier.

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  • Micro-Organisms Or Cultivation Processes Thereof (AREA)
EP08009631A 2008-05-27 2008-05-27 Procédé et dispositif de nettoyage d'un composant haute température Withdrawn EP2127764A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP08009631A EP2127764A1 (fr) 2008-05-27 2008-05-27 Procédé et dispositif de nettoyage d'un composant haute température

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08009631A EP2127764A1 (fr) 2008-05-27 2008-05-27 Procédé et dispositif de nettoyage d'un composant haute température

Publications (1)

Publication Number Publication Date
EP2127764A1 true EP2127764A1 (fr) 2009-12-02

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EP08009631A Withdrawn EP2127764A1 (fr) 2008-05-27 2008-05-27 Procédé et dispositif de nettoyage d'un composant haute température

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EP (1) EP2127764A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130273639A1 (en) * 2012-04-16 2013-10-17 Ulf Nilsson Treatment of a section of a flow engine

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2160464A1 (fr) * 1971-11-16 1973-06-29 Kansai Paint Co Ltd
US4995915A (en) 1988-07-15 1991-02-26 The Dow Chemical Company Cleaning gas turbine fuel nozzles
US6057147A (en) * 1997-01-21 2000-05-02 Overland; Bert A. Apparatus and method for bioremediation of hydrocarbon-contaminated objects
WO2001000344A1 (fr) * 1999-06-30 2001-01-04 Bechtel Bwxt Idaho, Llc Technique d'encapsulation permettant de maintenir une activite de decontamination biologique
EP1213370A2 (fr) * 2000-12-05 2002-06-12 General Electric Company Procédé et composition pour le nettoyage d'un composant de moteur de turbine à gaz
EP1574675A2 (fr) 2004-03-12 2005-09-14 General Electric Company Procédé et dispositif mobile de lavage
DE102005009724A1 (de) 2005-03-03 2006-09-07 Wilhelm Bader Vorrichtung und Verfahren zur konservierenden Aufbewahrung von Konserviergut, insbesondere Lebensmitteln

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2160464A1 (fr) * 1971-11-16 1973-06-29 Kansai Paint Co Ltd
US4995915A (en) 1988-07-15 1991-02-26 The Dow Chemical Company Cleaning gas turbine fuel nozzles
US6057147A (en) * 1997-01-21 2000-05-02 Overland; Bert A. Apparatus and method for bioremediation of hydrocarbon-contaminated objects
WO2001000344A1 (fr) * 1999-06-30 2001-01-04 Bechtel Bwxt Idaho, Llc Technique d'encapsulation permettant de maintenir une activite de decontamination biologique
US6465706B1 (en) * 1999-06-30 2002-10-15 Bechtel Bwxt Idaho, Llc Encapsulation method for maintaining biodecontamination activity
EP1213370A2 (fr) * 2000-12-05 2002-06-12 General Electric Company Procédé et composition pour le nettoyage d'un composant de moteur de turbine à gaz
EP1574675A2 (fr) 2004-03-12 2005-09-14 General Electric Company Procédé et dispositif mobile de lavage
DE102005009724A1 (de) 2005-03-03 2006-09-07 Wilhelm Bader Vorrichtung und Verfahren zur konservierenden Aufbewahrung von Konserviergut, insbesondere Lebensmitteln

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130273639A1 (en) * 2012-04-16 2013-10-17 Ulf Nilsson Treatment of a section of a flow engine
EP2653780A1 (fr) * 2012-04-16 2013-10-23 Siemens Aktiengesellschaft Traitement d'une section d'un moteur à écoulement

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