EP2426322A1 - Circuit de fluide pour une centrale et procédé de nettoyage chimique d'un circuit de fluide - Google Patents

Circuit de fluide pour une centrale et procédé de nettoyage chimique d'un circuit de fluide Download PDF

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Publication number
EP2426322A1
EP2426322A1 EP10175409A EP10175409A EP2426322A1 EP 2426322 A1 EP2426322 A1 EP 2426322A1 EP 10175409 A EP10175409 A EP 10175409A EP 10175409 A EP10175409 A EP 10175409A EP 2426322 A1 EP2426322 A1 EP 2426322A1
Authority
EP
European Patent Office
Prior art keywords
fluid circuit
cleaning
temporary
power plant
emptying
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Withdrawn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
EP10175409A
Other languages
German (de)
English (en)
Inventor
Klaus-Dieter Kuhnke
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
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 EP10175409A priority Critical patent/EP2426322A1/fr
Priority to PCT/EP2011/064741 priority patent/WO2012031913A1/fr
Publication of EP2426322A1 publication Critical patent/EP2426322A1/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Withdrawn legal-status Critical Current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
    • F01K13/00—General layout or general methods of operation of complete plants
    • F01K13/006—Auxiliaries or details not otherwise provided for
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
    • B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
    • B08B9/027—Cleaning the internal surfaces; Removal of blockages
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/14—Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions
    • C23G1/19—Iron or steel
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G3/00—Apparatus for cleaning or pickling metallic material
    • C23G3/04—Apparatus for cleaning or pickling metallic material for cleaning pipes
    • 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
    • F22B37/48—Devices or arrangements for removing water, minerals or sludge from boilers ; Arrangement of cleaning apparatus in boilers; Combinations thereof with boilers
    • F22B37/486—Devices for removing water, minerals or sludge from boilers
    • 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
    • F22B37/48—Devices or arrangements for removing water, minerals or sludge from boilers ; Arrangement of cleaning apparatus in boilers; Combinations thereof with boilers
    • F22B37/52—Washing-out devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
    • F28G9/00—Cleaning by flushing or washing, e.g. with chemical solvents

Definitions

  • the invention relates to a fluid circuit for a power plant with a permanent part to be cleaned and a temporary part for the dry cleaning of the permanent part.
  • the invention further relates to a method for chemically cleaning a fluid circuit, in particular a water-steam cycle in a power plant.
  • the water-steam cycle Before newly built power plants (GUD and DKW) are put into operation, the water-steam cycle must be cleaned.
  • the cleaning process consists of three process steps. In a first step, the water-steam cycle is rinsed with water to remove loose particles and deposits. In a second step, the chemical cleaning is carried out to remove iron oxides. In the final step, the water-steam circuit is purged with steam to remove the debris and particles not removed by the first step. In addition to this commonly used method, there is still the less common way to blow out with air or boil with chemicals.
  • the invention relates in essence to the step of dry cleaning. This step is usually carried out at GUD and steam power plants with inhibited hydrofluoric acid.
  • This step is usually carried out at GUD and steam power plants with inhibited hydrofluoric acid.
  • hydrofluoric acid is problematic because it is hazardous to health (Hazardous material: marking T + [very toxic] and C [corrosive]) and it has been shown that new, high temperature resistant materials after chemical cleaning with hydrofluoric acid have massive corrosion.
  • the invention has for its object to provide an apparatus and a method by which water-steam cycles can be cleaned for power plants in a reliable and cost-effective manner.
  • a cleaning should be possible without the use of hydrofluoric acid.
  • the lowest-lying emptying device is suitable for use temperatures above 150 ° C.
  • the lowest located emptying device is suitable for application temperatures up to 220 ° C.
  • the complexing agent can be used over a wide range of effects.
  • the fluid circuit is designed for a pressure up to 40 bar.
  • components of the temporary part which come into contact with a solution for the dry cleaning, at least at their contact surface with the solution of a higher-alloyed material.
  • the higher-alloyed material is stainless steel.
  • the temporary part can be installed in a simple and cost-effective manner.
  • the lowest located emptying device is arranged in the permanent part. In this case, the number of emptying devices in the temporary part can be reduced.
  • a circulation pump device with a power that makes it possible to pump a volume of the fluid circuit in 0.5 to 1.5 hours.
  • Lower power leads to poor temperature distribution in the fluid circuit to be cleaned, faster pumping causes too high flow rates and as a result erosion.
  • the fluid circuit comprises a sampling device with a sampling cooler.
  • a sampling cooler With the sampling cooler, re-evaporation and thus falsification during sampling of hot media (cleaning solution) is avoided.
  • an ammonium salt of an organic complexing agent (EDTA) and hydrazine (N 2 H 4 ) as a reducing agent are components of the cleaning solution.
  • EDTA dissolves iron up to a concentration of 30g Fe / 1.
  • the EDTA-iron chelate complex is non-toxic.
  • the cleaning is carried out at application temperatures between 130 ° C and 160 ° C.
  • EDTA is used as the organic complexing agent.
  • a reducing agent for example hydrazine, is added to the organic complexing agent.
  • Essential in the inventive method is to heat the entire fluid circuit with temporary means to 120 to a maximum of 220 ° C, preferably 150 ° C and then chemically clean the entire fluid circuit with few merging steps without intermediate emptying or cooling.
  • FIG. 1 shows schematically and by way of example a fluid circuit 1 of a power plant with a permanent part 2, the water-steam cycle of the power plant part to be cleaned, and a temporary part 3 for the dry cleaning of the permanent part 2.
  • the permanent part 2 comprises not shown, low, medium and high pressure areas, which may be cleaned separately.
  • the permanent part 2 has higher 4 and lower 5 areas, wherein in the lower areas 5 emptying devices 6 or so-called low point discharges are arranged.
  • the temporary part 3 is arranged substantially below the permanent part 2 of the power plant and also has emptying devices 7 at its lowest points.
  • the temporary part 3 is designed as a closed system for use temperatures up to 120 ° C, preferably 150 ° C, and pressures of 10 to 40 bar.
  • the components of the temporary part 3, which come into contact with the cleaning solution, should be at least at their contact surface with the solution of stainless steel or similar higher alloyed material. All low points 6,7 in the fluid circuit 1 must allow a controlled emptying up to the application temperature.
  • the temporary part 3 of the fluid circuit 1 comprises a circulating pump device 8 whose power in m 3 / h approximately corresponds to the system volume of the fluid circuit 1 or, if necessary, is greater. Furthermore, the temporary part 3 comprises a metering pump 9 to dose a defined amount of chemicals 10 at the application temperature, and a sampling device 11 with a sampling cooler. With the sampling cooler, re-evaporation and thus falsification during sampling of hot media (cleaning solution) is avoided. To heat the system up to the application temperature the fluid circuit 1 via a steam line 12 for the controlled steam supply.
  • FIG. 2 shows an alternative embodiment of the fluid circuit 1 of the invention.
  • the temporary part 3 is arranged substantially above the permanent part 2, or at least arranged such that its lowest lying areas are above the lower edge of the permanent part 2, so that the number of emptying devices 7 in the temporary part 3 can be reduced.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Cleaning By Liquid Or Steam (AREA)
EP10175409A 2010-09-06 2010-09-06 Circuit de fluide pour une centrale et procédé de nettoyage chimique d'un circuit de fluide Withdrawn EP2426322A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP10175409A EP2426322A1 (fr) 2010-09-06 2010-09-06 Circuit de fluide pour une centrale et procédé de nettoyage chimique d'un circuit de fluide
PCT/EP2011/064741 WO2012031913A1 (fr) 2010-09-06 2011-08-26 Circuit de fluide pour une centrale électrique et procédé pour le nettoyage chimique d'un circuit de fluide

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP10175409A EP2426322A1 (fr) 2010-09-06 2010-09-06 Circuit de fluide pour une centrale et procédé de nettoyage chimique d'un circuit de fluide

Publications (1)

Publication Number Publication Date
EP2426322A1 true EP2426322A1 (fr) 2012-03-07

Family

ID=43466904

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10175409A Withdrawn EP2426322A1 (fr) 2010-09-06 2010-09-06 Circuit de fluide pour une centrale et procédé de nettoyage chimique d'un circuit de fluide

Country Status (2)

Country Link
EP (1) EP2426322A1 (fr)
WO (1) WO2012031913A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107829102A (zh) * 2017-12-20 2018-03-23 中国二冶集团有限公司 用于碳钢管道的循环酸洗装置及方法
CN109338388A (zh) * 2018-12-27 2019-02-15 首钢水城钢铁(集团)赛德建设有限公司 一种循环式管道酸洗装置及方法
EP4571184A1 (fr) * 2023-12-12 2025-06-18 General Electric Technology GmbH Procédé de nettoyage pré-opérationnel de systèmes d'eau et de vapeur dans des centrales à cycle combiné et centrale à cycle combiné agencée pour celui-ci

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109762591B (zh) * 2019-02-27 2024-03-22 北京赛福贝特能源技术服务有限公司 一种用于原油常减压蒸馏系统的化学清洗装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1198693A (en) * 1966-08-02 1970-07-15 Beratherm A G Process for the Chemical Cleansing of Water and Steam Contacted Metal Surfaces.
EP0299166A1 (fr) * 1987-07-17 1989-01-18 Mitsubishi Jukogyo Kabushiki Kaisha Méthode pour enlever le dépôt sur les surfaces internes des membres tubulaires de chaudière
DE19843442C1 (de) * 1998-09-22 2000-03-02 Siemens Ag Vorrichtung und Verfahren zur Reinigung von dampfführenden Komponenten in Anlagen mit Dampfkesseln
DE10238730A1 (de) * 2002-08-23 2004-03-04 Framatome Anp Gmbh Verfahren zur Reinigung des Dampferzeugers eines Druckwasserreaktors
WO2008118450A1 (fr) * 2007-03-27 2008-10-02 Boyle Energy Services & Technology, Inc Procédé et appareil améliorés pour mettre en service des centrales électriques

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1198693A (en) * 1966-08-02 1970-07-15 Beratherm A G Process for the Chemical Cleansing of Water and Steam Contacted Metal Surfaces.
EP0299166A1 (fr) * 1987-07-17 1989-01-18 Mitsubishi Jukogyo Kabushiki Kaisha Méthode pour enlever le dépôt sur les surfaces internes des membres tubulaires de chaudière
DE19843442C1 (de) * 1998-09-22 2000-03-02 Siemens Ag Vorrichtung und Verfahren zur Reinigung von dampfführenden Komponenten in Anlagen mit Dampfkesseln
DE10238730A1 (de) * 2002-08-23 2004-03-04 Framatome Anp Gmbh Verfahren zur Reinigung des Dampferzeugers eines Druckwasserreaktors
WO2008118450A1 (fr) * 2007-03-27 2008-10-02 Boyle Energy Services & Technology, Inc Procédé et appareil améliorés pour mettre en service des centrales électriques

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107829102A (zh) * 2017-12-20 2018-03-23 中国二冶集团有限公司 用于碳钢管道的循环酸洗装置及方法
CN109338388A (zh) * 2018-12-27 2019-02-15 首钢水城钢铁(集团)赛德建设有限公司 一种循环式管道酸洗装置及方法
CN109338388B (zh) * 2018-12-27 2020-11-27 首钢水城钢铁(集团)赛德建设有限公司 一种循环式管道酸洗装置及方法
EP4571184A1 (fr) * 2023-12-12 2025-06-18 General Electric Technology GmbH Procédé de nettoyage pré-opérationnel de systèmes d'eau et de vapeur dans des centrales à cycle combiné et centrale à cycle combiné agencée pour celui-ci

Also Published As

Publication number Publication date
WO2012031913A1 (fr) 2012-03-15

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