EP1245795A2 - Procédé pour éviter les dépôts dans un système à vapeur - Google Patents

Procédé pour éviter les dépôts dans un système à vapeur Download PDF

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Publication number
EP1245795A2
EP1245795A2 EP02405180A EP02405180A EP1245795A2 EP 1245795 A2 EP1245795 A2 EP 1245795A2 EP 02405180 A EP02405180 A EP 02405180A EP 02405180 A EP02405180 A EP 02405180A EP 1245795 A2 EP1245795 A2 EP 1245795A2
Authority
EP
European Patent Office
Prior art keywords
steam
pressure
temperature
solubility
systems
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Withdrawn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
EP02405180A
Other languages
German (de)
English (en)
Other versions
EP1245795A3 (fr
Inventor
Erhard Dr. Liebig
Robert Dr. Svoboda
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
Original Assignee
Alstom Technology AG
Alstom Schweiz AG
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 Alstom Technology AG, Alstom Schweiz AG filed Critical Alstom Technology AG
Publication of EP1245795A2 publication Critical patent/EP1245795A2/fr
Publication of EP1245795A3 publication Critical patent/EP1245795A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • F01K21/00—Steam engine plants not otherwise provided for
    • F01K21/06—Treating live steam, other than thermodynamically, e.g. for fighting deposits in engine

Definitions

  • the present invention relates to a method for preventing the deposition of contaminants in steam systems in which the steam flowing therein has the given steam quality Is subject to temperature and / or pressure changes.
  • the invention also relates to a steam system to carry out the process.
  • steam is increasingly being used for efficiency reasons use as a coolant.
  • This steam can be used as a steam but also as a steam-air mixture, the components to be cooled in an open, semi-open or closed system flow through.
  • the steam is supplied by a steam supply device (Waste heat boiler, steam turbine system, auxiliary steam generator, ...) to the device for Use of steam, for example, led to a gas turbine system to its components To cool warming.
  • the cooling steam arrives after flowing through the cooling system for example gas turbine system in the working fluid of the gas turbine system and with it ultimately into the atmosphere.
  • the steam is supplied by a steam supply device (Waste heat boiler, steam turbine system, auxiliary steam generator, ...) to the device for Use of steam, for example, led to a gas turbine system to its components To cool warming.
  • the cooling steam is after flowing through the cooling system Gas turbine system of a device for steam extraction (waste heat boiler, steam turbine system, technological process, ).
  • the device for providing steam (steam cooler, Steam blower, steam filter, ...) identical to the device for steam extraction.
  • the device for using steam is in in our case the gas turbine plant, steam with the appropriate parameters available posed.
  • the Steam After flowing through the cooling system of the gas turbine system, the Steam is returned to the steam supply device for maintenance purposes of the circuit necessary pressure increase, cooling, cleaning u.
  • the steam is returned to the steam supply device for maintenance purposes of the circuit necessary pressure increase, cooling, cleaning u.
  • steam is used as an additional Work equipment to increase the mass flow of the work equipment in the gas turbine plant injected.
  • This can in turn take the form of direct injection of steam into the Work equipment or indirectly after the flow through gas turbine components to be cooled respectively.
  • the steam can also be in the form of a steam-air mixture, i.e. H. in combination with cooling air via an open air cooling system, again indirectly, d. H. after the flow of gas turbine components to be cooled, into which working fluid is injected.
  • the steam injection method is used. H. the steam introduction into the work equipment the gas turbine system also in the Cheng Cycle.
  • the Cheng Cycle is used to avoid a steam turbine system and the one required to operate the steam turbine system Systems of steam generated in the waste heat boiler completely into the gas turbine plant injected.
  • Impurities in the steam are characterized by a certain solubility in steam.
  • silicon dioxide SiO 2
  • SiO 2 is of particular importance because of the problems with the cleaning of make-up water and condensate as well as the difficulties in measuring. Representing the large number of possible contaminants, SiO 2 is therefore used as an example below.
  • the invention is therefore based on the object of a method for preventing deposition of contaminants in steam systems, in which the Disadvantages of the prior art can be avoided.
  • the solution to the above object according to the invention is, in such steam systems, in which the steam of given steam quality flows in temperature and / or Is subject to pressure changes through a corresponding constructive design and design of steam systems to prevent changes in the Temperature and / or pressure conditions within the steam system the steam solubility of the impurities present in the steam in certain concentrations becomes.
  • a first embodiment of the method according to the invention is characterized in that the impurities are silicon dioxide (SiO 2 ).
  • the method involves steam cooling or a steam injection of a gas turbine system is used. These are two special ones significant applications of steam in gas turbine plants.
  • An additional measure to prevent deposits can also be provided the temperature and / or pressure of the steam flowing in the steam system be set so that in the steam system the steam solubility in a particular The concentration of impurities present in the steam is not exceeded.
  • the parameters of temperature and / or pressure in steam systems flowing steam sufficiently large to be able to select or optimize at least one of these parameters to further reduce the risk of deposits.
  • the method can be designed particularly advantageously by using both values are monitored at the same time, and the value pair of pressure and temperature of the steam in the Steam system never takes on a critical value, and that particularly critical areas the steam system with significant pressure drops can be avoided. In particular, can this also happens by a drop in pressure such that the Vapor solubility of the impurities present in the vapor in certain concentrations would be compensated for by a corresponding rise in temperature becomes.
  • Another embodiment of the invention is characterized in that the only one critical pressure drop in the steam system to the point where the steam exits the device is placed for steam use. So at most in the easy-to-clean exit region Deposits are made. The flow velocities are also at the exit point the steam high, a self-cleaning effect can occur.
  • the invention also includes a steam system for performing one of those described above Method.
  • FIG. 1 shows an example of all impurities, a diagram for the solubility of SiO 2 in water or steam as a function of temperature at pressures of 1 bar, 6 bar, 19 bar and 50 bar. It can be seen that SiO 2 is soluble in steam at a pressure of 6 bar and a temperature of 400 ° C up to a concentration of approx. 1 mg / kg (1000 ppb).
  • Rule in steam systems of gas turbine plants typically temperatures in the range of 250 to 580 ° C and pressures in the range from 20 to 40 bar.
  • a gas turbine system is subsequently a system consisting of at least understood a compressor, at least one combustion chamber and at least one gas turbine. Air is drawn in and compressed by the compressor, then as combustion air fed to a combustion chamber, and the hot gas produced there in a work-performing manner Gas turbine relaxes.
  • the at least one gas turbine and the at least one compressor are on a wave.
  • Waste heat boilers have up to three Pressure levels and possibly overheating. So there are many of ways to influence the parameters of a corresponding steam system.
  • the steam serves to cool components, as shown in the example of the gas turbine system, the steam is heated up by the absorption of heat. Is constructive now Make sure that before and / or in areas with a significant drop in pressure there is an appropriate one The cooling steam is heated.
  • FIG. 2 shows an hs diagram with lines of constant SiO 2 solubility in steam. Again one sees the decreasing vapor solubility as the pressure and temperature decrease. Interestingly, the lines of constant SiO 2 vapor solubility correspond approximately to the bisector between the lines of constant pressure and the lines of constant temperature. The limit value (GW) for steam turbines is also shown.
  • FIG. 3 shows the state changes of the steam within a steam system, in the present case a semi-open steam cooling system of a gas turbine system, in the form of an hs diagram (x-axis: entropy, y-axis: enthalpy).
  • the cooling steam has a pressure of 30 bar and a temperature of 360 ° C at point E (exit from the device for providing steam).
  • the gas turbine system or the component to be cooled for example a blade, pressure losses of approximately 8 bar and temperature losses of approximately 5 K occur.
  • the steam therefore has a pressure of approx. 22 bar and a temperature of 355 ° C at point F (entry into the device for steam use).

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Control Of Turbines (AREA)
EP02405180A 2001-03-30 2002-03-11 Procédé pour éviter les dépôts dans un système à vapeur Withdrawn EP1245795A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10116034 2001-03-30
DE10116034A DE10116034A1 (de) 2001-03-30 2001-03-30 Verfahren zur Verhinderung von Ablagerungen in Dampfsystemen

Publications (2)

Publication Number Publication Date
EP1245795A2 true EP1245795A2 (fr) 2002-10-02
EP1245795A3 EP1245795A3 (fr) 2004-10-06

Family

ID=7679850

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02405180A Withdrawn EP1245795A3 (fr) 2001-03-30 2002-03-11 Procédé pour éviter les dépôts dans un système à vapeur

Country Status (3)

Country Link
US (2) US20020139118A1 (fr)
EP (1) EP1245795A3 (fr)
DE (1) DE10116034A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005046721B3 (de) * 2005-09-29 2006-10-26 Siemens Ag Verfahren zur Steuerung der Kondensation von Flüssigkeiten in einer Dampfturbine und zugehörige Dampfturbine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140137564A1 (en) * 2012-11-19 2014-05-22 General Electric Company Mitigation of Hot Corrosion in Steam Injected Gas Turbines

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2595490A (en) * 1945-01-04 1952-05-06 Wyandotte Chemicals Corp Prevention of siliceous deposition from steam
US4386498A (en) * 1980-10-15 1983-06-07 Westinghouse Electric Corp. Method and apparatus for preventing the deposition of corrosive salts on rotor blades of steam turbines
US4492083A (en) * 1980-07-18 1985-01-08 Magma Power Company Geothermal salinity control system
US4509332A (en) * 1984-04-30 1985-04-09 Westinghouse Electric Corp. Apparatus for monitoring corrosive salt solutions in a low pressure steam turbine
EP0508387A1 (fr) * 1991-04-09 1992-10-14 Mitsubishi Jukogyo Kabushiki Kaisha Procédé pour éviter l'adhésion de tartre et tuyère de turbine géothermique à vapeur

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH625015A5 (fr) * 1977-09-26 1981-08-31 Bbc Brown Boveri & Cie
EP0764767B1 (fr) * 1995-09-22 2002-12-04 Kabushiki Kaisha Toshiba Centrale à cycle combiné
DE19544224B4 (de) * 1995-11-28 2004-10-14 Alstom Chemische Fahrweise eines Wasser/Dampf-Kreislaufes
DE19721854A1 (de) * 1997-05-26 1998-12-03 Asea Brown Boveri Verbesserung des Abscheidegrades von Dampfverunreinigungen in einem Dampf-Wasser-Separator
DE59807972D1 (de) * 1998-08-18 2003-05-22 Alstom Switzerland Ltd Dampfkraftanlage und Verfahren zum Anfahren und zur Reinigung deren Dampf-Wasserkreislaufs
US6112524A (en) * 1998-10-02 2000-09-05 Union Oil Company Of California Method for removing contaminants from geothermal steam

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2595490A (en) * 1945-01-04 1952-05-06 Wyandotte Chemicals Corp Prevention of siliceous deposition from steam
US4492083A (en) * 1980-07-18 1985-01-08 Magma Power Company Geothermal salinity control system
US4386498A (en) * 1980-10-15 1983-06-07 Westinghouse Electric Corp. Method and apparatus for preventing the deposition of corrosive salts on rotor blades of steam turbines
US4509332A (en) * 1984-04-30 1985-04-09 Westinghouse Electric Corp. Apparatus for monitoring corrosive salt solutions in a low pressure steam turbine
EP0508387A1 (fr) * 1991-04-09 1992-10-14 Mitsubishi Jukogyo Kabushiki Kaisha Procédé pour éviter l'adhésion de tartre et tuyère de turbine géothermique à vapeur

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005046721B3 (de) * 2005-09-29 2006-10-26 Siemens Ag Verfahren zur Steuerung der Kondensation von Flüssigkeiten in einer Dampfturbine und zugehörige Dampfturbine

Also Published As

Publication number Publication date
US20020139118A1 (en) 2002-10-03
EP1245795A3 (fr) 2004-10-06
DE10116034A1 (de) 2002-10-02
US20060010877A1 (en) 2006-01-19

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