EP0776707A2 - Procédé de nettoyage d'agrégats d'une centrale d'énergie - Google Patents

Procédé de nettoyage d'agrégats d'une centrale d'énergie Download PDF

Info

Publication number
EP0776707A2
EP0776707A2 EP96810785A EP96810785A EP0776707A2 EP 0776707 A2 EP0776707 A2 EP 0776707A2 EP 96810785 A EP96810785 A EP 96810785A EP 96810785 A EP96810785 A EP 96810785A EP 0776707 A2 EP0776707 A2 EP 0776707A2
Authority
EP
European Patent Office
Prior art keywords
blowing
medium
steam
cleaning
blow
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.)
Granted
Application number
EP96810785A
Other languages
German (de)
English (en)
Other versions
EP0776707B1 (fr
EP0776707A3 (fr
Inventor
Bruno Jordi
Ralf Kuske
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.)
ABB Schweiz AG
Original Assignee
ABB Asea Brown Boveri Ltd
Asea Brown Boveri AB
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 ABB Asea Brown Boveri Ltd, Asea Brown Boveri AB filed Critical ABB Asea Brown Boveri Ltd
Publication of EP0776707A2 publication Critical patent/EP0776707A2/fr
Publication of EP0776707A3 publication Critical patent/EP0776707A3/fr
Application granted granted Critical
Publication of EP0776707B1 publication Critical patent/EP0776707B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • F28G5/00—Cleaning by distortion
    • 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
    • B08B7/0064—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by temperature changes

Definitions

  • the present invention relates to a method according to the preamble of claim 1.
  • cleaning in particular the steam line, the evaporator, superheater, etc. must be provided.
  • the final purpose of such cleaning operations is in itself to protect the units, in particular the turbomachines, for example the steam turbine, from the dirt which inevitably arises during assembly or during revisions of the systems mentioned.
  • the terminology used here for this process is called "blowing out”.
  • the invention seeks to remedy this.
  • the object of the invention is to maximize the cleaning effect and to minimize the blow-out time in a method of the type mentioned at the outset.
  • the main advantage of the invention is that only the advantages of the above-mentioned methods are activated without having to consider their disadvantages.
  • high backpressures are used for blowing out over several hours.
  • the blow-out time depends on the demi water supply or whose production is used for steam production.
  • the blow-out is stopped overnight so that the system can cool down during this time and the water treatment system can provide new demi-water for the next blow-out.
  • the subsequent blow-out then causes a thermal shock, which, as described above, triggers a great cleaning effect.
  • the subsequent repetition of the continuous blowing out with high dynamic pressures after the respective cooling sometimes reinforces the great cleaning effect of the previous thermal shock, whereby a few cycles are required for effective cleaning.
  • FIG. 1a and 1b show a method belonging to the state of the art for cleaning units of a power plant in the installed state by means of short cyclical blow-out blows which in themselves trigger a large thermal shock.
  • the individual blow-out blows A, B by means of a suitable medium take place approximately every 12 hours, as the abscissa t expresses. While the temperature T of the medium used is approximately 500-550 ° C., the dynamic pressure ratio p is set to> 1.
  • 3a and 3b show the method according to the invention for cleaning units of a power plant in the installed state.
  • the process is carried out at a medium temperature T, above 400 ° C., with a high dynamic pressure ratio p of approximately 4 and higher.
  • T medium temperature
  • p high dynamic pressure ratio
  • This is done by blowing out over several hours, as the division on the abscissa t wants to become, as can also be seen from the curves E, F.
  • the blow-out time essentially depends on the demi water supply. its production, which is needed for steam production.
  • the blow-out is then stopped, for example overnight, so that the system can cool down during this time and the water treatment system can make new demi-water available for the subsequent blow-out before the process is started again.
  • the thermal shock triggered with each blow-out has a great cleaning effect.
  • the subsequent blowing out over several hours (see curves E and F) with high dynamic pressure ratios p increases the great cleaning effect of the thermal shock.
  • High back pressure conditions during blowing are caused by high speeds. High speeds occur when there are low pressures in the system to be cleaned and consequently larger specific volumes. These conditions are preferably created by providing a muffler with a very low pressure drop and a water injection for this purpose in the provisional pipelines. This water injection right at the beginning of the provisional pipes causes a small pressure in the system to be cleaned, with a large conditioning of the steam. This results in an additional effect in this method, which can also be found in the method according to FIGS.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Cleaning In General (AREA)
  • Detergent Compositions (AREA)
EP96810785A 1995-12-02 1996-11-13 Procédé de nettoyage d'aggrégats d'une centrale d'énergie Expired - Lifetime EP0776707B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19545035 1995-12-02
DE19545035A DE19545035A1 (de) 1995-12-02 1995-12-02 Verfahren zum Reinigen von Aggregaten einer Kraftwerksanlage

Publications (3)

Publication Number Publication Date
EP0776707A2 true EP0776707A2 (fr) 1997-06-04
EP0776707A3 EP0776707A3 (fr) 1998-05-20
EP0776707B1 EP0776707B1 (fr) 2000-12-20

Family

ID=7779049

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96810785A Expired - Lifetime EP0776707B1 (fr) 1995-12-02 1996-11-13 Procédé de nettoyage d'aggrégats d'une centrale d'énergie

Country Status (4)

Country Link
EP (1) EP0776707B1 (fr)
JP (1) JP3893178B2 (fr)
CN (1) CN1131738C (fr)
DE (2) DE19545035A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003027580A1 (fr) * 2001-09-22 2003-04-03 Imi Vision Limited Dispositif de chauffage de liquide
EP1797969A1 (fr) * 2005-12-16 2007-06-20 Siemens Aktiengesellschaft Méthode et dispositif pour le nettoyage de portions d'une centrale électrique par soufflage d'un médium ainsi que appareil de mesure du degré de pureté du médium

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101655335B (zh) * 2008-08-19 2011-08-03 华北电力科学研究院有限责任公司 直接空冷系统热态清洗装置及方法
CN103574585A (zh) * 2012-07-26 2014-02-12 中国石油化工股份有限公司 清除废热锅炉结垢的方法
DE112022001459T5 (de) * 2021-03-12 2023-12-21 Mitsubishi Heavy Industries, Ltd. Verfahren zum reinigen von dampfsystem von kombikraftwerk

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2202465B2 (de) * 1972-01-17 1976-11-04 Raab Karcher GmbH, 4300 Essen Verfahren zur feuerraumseitigen generalreinigung der nachschaltheizflaechen von grosskesseln
US4141754A (en) * 1977-05-10 1979-02-27 Svenska Rotor Maskiner Aktiebolag Apparatus and method for cleaning the heat exchanging surfaces of the heat transfer plates of a rotary regenerative heat exchanger
US4377420A (en) * 1980-03-06 1983-03-22 United Technologies Corporation Removal of carbonaceous material from gas turbine cavities
US4581074A (en) * 1983-02-03 1986-04-08 Mankina Nadezhda N Method for cleaning internal heat transfer surfaces of boiler tubes
DE3317099A1 (de) * 1983-05-10 1984-11-15 Kraftwerk Union AG, 4330 Mülheim Positioniereinrichtung zur fernbedienbaren inspektion, reinigung und reparatur der parallelen rohre eines rohrbuendels
US4853014A (en) * 1987-07-27 1989-08-01 Naylor Industrial Services, Inc. Method and apparatus for cleaning conduits
DE4216383A1 (de) * 1992-05-18 1993-11-25 Siemens Ag Verfahren zum Reinigen eines geschlossenen Behälters

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003027580A1 (fr) * 2001-09-22 2003-04-03 Imi Vision Limited Dispositif de chauffage de liquide
GB2395771A (en) * 2001-09-22 2004-06-02 Imi Vision Ltd Liquid heating apparatus
EP1797969A1 (fr) * 2005-12-16 2007-06-20 Siemens Aktiengesellschaft Méthode et dispositif pour le nettoyage de portions d'une centrale électrique par soufflage d'un médium ainsi que appareil de mesure du degré de pureté du médium
WO2007071478A1 (fr) * 2005-12-16 2007-06-28 Siemens Aktiengesellschaft Procede et dispositif de nettoyage de composants d'une centrale electrique par soufflage d'un fluide, et dispositif de mesure utilise pour la mesure du degre de purete dudit fluide
US8038801B2 (en) 2005-12-16 2011-10-18 Siemens Aktiengesellschaft Method and apparatus for the cleaning of components of a power plant by the injection of a medium and measuring device for measuring the degree of purity of the medium
CN101330991B (zh) * 2005-12-16 2013-02-13 西门子公司 通过吹入介质清洁发电站构件的方法和设备以及测量介质纯度的测量装置

Also Published As

Publication number Publication date
EP0776707B1 (fr) 2000-12-20
JPH09173999A (ja) 1997-07-08
EP0776707A3 (fr) 1998-05-20
JP3893178B2 (ja) 2007-03-14
DE19545035A1 (de) 1997-06-05
CN1156241A (zh) 1997-08-06
DE59606231D1 (de) 2001-01-25
CN1131738C (zh) 2003-12-24

Similar Documents

Publication Publication Date Title
DE69934737T2 (de) Niedrig belastetes Deckbandsegment für eine Turbine
EP1871549B1 (fr) Dispositif d'extraction
EP0776707B1 (fr) Procédé de nettoyage d'aggrégats d'une centrale d'énergie
DE10230610A1 (de) Verfahren und Vorrichtung zur Verhinderung von Ablagerungen in Dampfsystemen
DE102014003877A1 (de) Verfahren und Vorrichtung zur on-line-Reinigung von Zweistoffdüsen
EP0781356B1 (fr) Procede d' acheminement d' une solution de cellulose dans un oxyde d' amine tertiaire aqueux
DE102020114303A1 (de) Flansch, Flanschverbindung und Verfahren zum Betrieb einer Flanschverbindung
DE19643336A1 (de) Verfahren zum Demontieren des stirnseitigen Lagergehäuses oder ND-Verdichter-Wellenteiles eines Flugtriebwerkes
EP0058386B1 (fr) Mandrin et procédé de fixation d'un tube tenant la pression dans une plaque à tube ou analogue
DE1095229B (de) Verfahren und Vorrichtung zur Nutzbarmachung der Druckenergie von Erdoellagerstaetten
EP1142611B1 (fr) Procédé pour l'optimisation d'un système d'extinction d'incendie à pulvérisation d'eau et système d'extinction d'incendie à pulvérisation d'eau pour la mise en oeuvre du procédé
CH662634A5 (de) Mediumfuehrende leitung mit mindestens einer drosselvorrichtung.
DE606029C (de) Verfahren zur Herstellung von Leitschaufelkraenzen fuer Dampf- oder Gasturbinen mit axialer Einstroemung
WO2004097179A1 (fr) Procede de maintenance de turbines a gaz
DE722235C (de) Verfahren zur Herstellung von Rippenrohren
EP0481573A1 (fr) Dispositif pour réduction de pression d'un média à gaz
DE102016114906A1 (de) Vorrichtung und Verfahren zum Speichern und Rückgewinnen von Energie
DE1170434B (de) Verfahren zur Herabminderung von betriebs-bedingt hervorgerufenen Zug- und Druck-spannungen in Waermetauscher-Rohrregistern
EP4140593B1 (fr) Dispositif de buse et son procédé de fabrication
DE102014212824A1 (de) Verfahren und Vorrichtung zum Spülen und/oder Sperren wenigstens eines Brenners einer Gasturbinenanlage
EP2901071B1 (fr) Procédé et dispositif de chauffer de gaz naturel
DE2924376C2 (de) Einrichtung zum Einwalzen eines innen beschichteten Rohres in einen Rohrboden
DE530368C (de) Rohrwalzwerk zur Herstellung kleiner Rohre
DE2904372A1 (de) Verfahren zum herstellen von buendeln miteinander verbundener rohre
DE563896C (de) Turbinenanlage

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): DE FR GB NL

RHK1 Main classification (correction)

Ipc: B08B 7/00

RTI1 Title (correction)
PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): DE FR GB NL

17P Request for examination filed

Effective date: 19981118

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

17Q First examination report despatched

Effective date: 20000127

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: ABB (SCHWEIZ) AG

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB NL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20001220

REF Corresponds to:

Ref document number: 59606231

Country of ref document: DE

Date of ref document: 20010125

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20010316

ET Fr: translation filed
NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

REG Reference to a national code

Ref country code: GB

Ref legal event code: 732E

REG Reference to a national code

Ref country code: FR

Ref legal event code: CD

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20091130

Year of fee payment: 14

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20091007

Year of fee payment: 14

Ref country code: FR

Payment date: 20091120

Year of fee payment: 14

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20101113

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 59606231

Country of ref document: DE

Effective date: 20110601

Ref country code: DE

Ref legal event code: R119

Ref document number: 59606231

Country of ref document: DE

Effective date: 20110531

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20110801

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110531

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20101130

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20101113