EP0776707B1 - Verfahren zum Reinigen von Aggregaten einer Kraftwerksanlage - Google Patents

Verfahren zum Reinigen von Aggregaten einer Kraftwerksanlage Download PDF

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Publication number
EP0776707B1
EP0776707B1 EP96810785A EP96810785A EP0776707B1 EP 0776707 B1 EP0776707 B1 EP 0776707B1 EP 96810785 A EP96810785 A EP 96810785A EP 96810785 A EP96810785 A EP 96810785A EP 0776707 B1 EP0776707 B1 EP 0776707B1
Authority
EP
European Patent Office
Prior art keywords
steam
injection
cleaning
units
thermal shock
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.)
Expired - Lifetime
Application number
EP96810785A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0776707A3 (de
EP0776707A2 (de
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 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 ABB Schweiz AG filed Critical ABB Schweiz AG
Publication of EP0776707A2 publication Critical patent/EP0776707A2/de
Publication of EP0776707A3 publication Critical patent/EP0776707A3/de
Application granted granted Critical
Publication of EP0776707B1 publication Critical patent/EP0776707B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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.
  • the invention seeks to remedy this.
  • the invention how it is characterized in the claims, the task lies the basis for a procedure of the type mentioned at the beginning Maximize cleaning effect and minimize blow-out time.
  • the main advantage of the invention is that that only activated the advantages of the above methods without including their disadvantages have to.
  • high back pressures are used blown out for several hours.
  • the blow-out time depends here from the Demi water supply resp. whose production starts from is used for steam production. After that, for example blowout set overnight so that System cool down during this time and the water treatment system new demi water for the next blowout Can provide.
  • the subsequent blow-out causes then a thermal shock that, as described above, causes a triggers great cleaning effect.
  • the subsequent repetition of continuous blowing out with high back pressures after the respective cooling sometimes the larger ones Cleaning effect of the previous thermal shock, whereby for effective cleaning only a few cycles are required.
  • FIG. 1a and 1b show one of the prior art Process 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 blowouts A, B using a suitable Medium take place approximately every 12 hours, like this Abscissa expresses t. While the temperature T of medium used is about 500-550 ° C, the back pressure ratio p moved to> 1.
  • T of medium used is about 500-550 ° C
  • 3a and 3b show the method according to the invention for Cleaning aggregates of a power plant in the built-in Status.
  • This procedure uses medium temperature T, above 400 ° C, with a high dynamic pressure ratio p of worked about 4 and higher. This is done by using several Hours as the division on the abscissa t symbolize wants to be blown out, as is the case with curves E, F emerges.
  • the blow-out time essentially depends from the Demi water supply or whose production from that for Steam production is needed. After that, for example blowout set overnight so that the system during cool down this time and the water treatment system new demi-water is available for subsequent blowing out can put before the procedure resumed becomes. The thermal shock triggered with each blowout causes a great cleaning effect.

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 Verfahren zum Reinigen von Aggregaten einer Kraftwerksanlage Expired - Lifetime EP0776707B1 (de)

Applications Claiming Priority (2)

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

Publications (3)

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

Family

ID=7779049

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96810785A Expired - Lifetime EP0776707B1 (de) 1995-12-02 1996-11-13 Verfahren zum Reinigen von Aggregaten einer Kraftwerksanlage

Country Status (4)

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

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0122856D0 (en) * 2001-09-22 2001-11-14 Imi Plc Liquid heating apparatus
EP1797969A1 (de) * 2005-12-16 2007-06-20 Siemens Aktiengesellschaft Verfahren und Vorrichtung zum Reinigen von Komponenten einer Kraftwerksanlage durch Einblasen eines Mediums sowie Messeinrichtung zur Messung des Reinheitsgrads des Mediums
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

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

Also Published As

Publication number Publication date
JPH09173999A (ja) 1997-07-08
EP0776707A3 (de) 1998-05-20
JP3893178B2 (ja) 2007-03-14
DE19545035A1 (de) 1997-06-05
DE59606231D1 (de) 2001-01-25
CN1131738C (zh) 2003-12-24
CN1156241A (zh) 1997-08-06
EP0776707A2 (de) 1997-06-04

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