JPS6423096A - Removal method of scale on inner surface of main steam pipe at boiler outlet - Google Patents

Removal method of scale on inner surface of main steam pipe at boiler outlet

Info

Publication number
JPS6423096A
JPS6423096A JP17716587A JP17716587A JPS6423096A JP S6423096 A JPS6423096 A JP S6423096A JP 17716587 A JP17716587 A JP 17716587A JP 17716587 A JP17716587 A JP 17716587A JP S6423096 A JPS6423096 A JP S6423096A
Authority
JP
Japan
Prior art keywords
main steam
steam pipe
adapter
scale
cleaning liquid
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
JP17716587A
Other languages
Japanese (ja)
Other versions
JP2511055B2 (en
Inventor
Shozo Kaneko
Akihiro Niimura
Mitsuhiko Ishida
Yukio Hayashi
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.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
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 Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to JP17716587A priority Critical patent/JP2511055B2/en
Priority to EP88107845A priority patent/EP0299166A1/en
Publication of JPS6423096A publication Critical patent/JPS6423096A/en
Application granted granted Critical
Publication of JP2511055B2 publication Critical patent/JP2511055B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Pipeline Systems (AREA)
  • Cleaning In General (AREA)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)

Abstract

PURPOSE:To remove scale in preventing completely a chemical cleaning liquid from flowing into the superheater side of a boiler by a method wherein a main steam pipe is cut off and the main steam pipe where the occurrence of scale is the most severe is only formed into a loop and the chemical cleaning liquid is circulated. CONSTITUTION:To sever the cutoff part 2 of a main steam pipe at the downstream part of the outlet header 1 of the final superheater, fixing devices 3 are attached to prevent vibration caused by the reaction force of piping before the cutting of the main steam pipe and the parts before and after the cutoff part are fixed. After the main steam pipe 4 is cut off by a beveling machine, an adapter 5 for attaching temporary piping is placed. The main steam stop valve 6 at the inlet part of a turbine is opened to attach a blind cover 10 for preventing the inflow of a liquid into the turbine side and an adapter 7 for attaching temporary piping is installed and the adapter 5 at the boiler outlet part and the adapter 7 at the valve 6 are connected with temporary piping 8 equipped with a circulation pump 9 to form a circulating passage and a chemical cleaning liquid is circulated by the pump 9 to melt and remove scale.
JP17716587A 1987-07-17 1987-07-17 Boiler outlet main steam pipe inner surface scale removal method Expired - Fee Related JP2511055B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP17716587A JP2511055B2 (en) 1987-07-17 1987-07-17 Boiler outlet main steam pipe inner surface scale removal method
EP88107845A EP0299166A1 (en) 1987-07-17 1988-05-16 Method for removing scale on inner surfaces of boiler tube members

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17716587A JP2511055B2 (en) 1987-07-17 1987-07-17 Boiler outlet main steam pipe inner surface scale removal method

Publications (2)

Publication Number Publication Date
JPS6423096A true JPS6423096A (en) 1989-01-25
JP2511055B2 JP2511055B2 (en) 1996-06-26

Family

ID=16026319

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17716587A Expired - Fee Related JP2511055B2 (en) 1987-07-17 1987-07-17 Boiler outlet main steam pipe inner surface scale removal method

Country Status (1)

Country Link
JP (1) JP2511055B2 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008089286A (en) * 2006-10-05 2008-04-17 Chugoku Electric Power Co Inc:The Superheater tube washing method
JP2009229017A (en) * 2008-03-25 2009-10-08 Kurita Engineering Co Ltd Seal plug and steam pipe washing method using the same
JP2013170762A (en) * 2012-02-21 2013-09-02 Shikoku Electric Power Co Inc Chemical cleaning method of main steam pipe or reheat steam pipe
JP2013257054A (en) * 2012-06-11 2013-12-26 Kurita Engineering Co Ltd Chemical cleaning method of boiler
JP2020067240A (en) * 2018-10-25 2020-04-30 東京電力ホールディングス株式会社 Chemical cleaning method of boiler
CN114110562A (en) * 2021-11-25 2022-03-01 西安净源水处理科技有限公司 Superheater chemical cleaning main valve plugging device

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008089286A (en) * 2006-10-05 2008-04-17 Chugoku Electric Power Co Inc:The Superheater tube washing method
JP2009229017A (en) * 2008-03-25 2009-10-08 Kurita Engineering Co Ltd Seal plug and steam pipe washing method using the same
JP2013170762A (en) * 2012-02-21 2013-09-02 Shikoku Electric Power Co Inc Chemical cleaning method of main steam pipe or reheat steam pipe
JP2013257054A (en) * 2012-06-11 2013-12-26 Kurita Engineering Co Ltd Chemical cleaning method of boiler
JP2020067240A (en) * 2018-10-25 2020-04-30 東京電力ホールディングス株式会社 Chemical cleaning method of boiler
CN114110562A (en) * 2021-11-25 2022-03-01 西安净源水处理科技有限公司 Superheater chemical cleaning main valve plugging device
CN114110562B (en) * 2021-11-25 2023-08-22 西安净源水处理科技有限公司 Main valve plugging device for chemical cleaning of superheater

Also Published As

Publication number Publication date
JP2511055B2 (en) 1996-06-26

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees