JPS6475894A - Method of cleaning heat exchanger - Google Patents

Method of cleaning heat exchanger

Info

Publication number
JPS6475894A
JPS6475894A JP23172487A JP23172487A JPS6475894A JP S6475894 A JPS6475894 A JP S6475894A JP 23172487 A JP23172487 A JP 23172487A JP 23172487 A JP23172487 A JP 23172487A JP S6475894 A JPS6475894 A JP S6475894A
Authority
JP
Japan
Prior art keywords
cleaning
heat exchanger
carried out
matters
dissolve
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.)
Pending
Application number
JP23172487A
Other languages
Japanese (ja)
Inventor
Shinichi Tetsui
Kenichi Inaba
Fukuo Era
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.)
KORYU KOGYO KK
KOURIYUU KOGYO KK
Original Assignee
KORYU KOGYO KK
KOURIYUU KOGYO KK
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 KORYU KOGYO KK, KOURIYUU KOGYO KK filed Critical KORYU KOGYO KK
Priority to JP23172487A priority Critical patent/JPS6475894A/en
Publication of JPS6475894A publication Critical patent/JPS6475894A/en
Pending legal-status Critical Current

Links

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
    • F28G9/00—Cleaning by flushing or washing, e.g. with chemical solvents

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)

Abstract

PURPOSE:To provide a novel method of cleaning scales which are generated in the heat exchanger of an acidic gas remover in a gasification process, and which are difficult to be cleaned by cleaning the heat exchanger in two stages of cleaning by an alkali solution of high concentration heated to a temperature higher than a specific temperature and pickling, and using in a combination a nitrogen gas bubbling operation. CONSTITUTION:First, an alkali solution having a high alkali concentration of 10-20% (not about 1% which has been conventionally carried out) and by heating the solution to 70 deg.C or higher, whereby sulfur increases its solutility and almost elutes. By conducting picking continuous to cleaning inorganic matters such as iron sulfide, iron oxide and the like dissolve. However, unburnt carbons and organic matters do not dissolve but remain in the form of porous matters. By using in combination a nitrogen gas bubbling operation so as to exfoliate and collapse the residue, scale cleaning-off are substantially completely carried out. If any one of these three operations is not carried out, cleaning-off of scales are extremely incomplete, and therefore the object of cleaning is not attained.
JP23172487A 1987-09-16 1987-09-16 Method of cleaning heat exchanger Pending JPS6475894A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP23172487A JPS6475894A (en) 1987-09-16 1987-09-16 Method of cleaning heat exchanger

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP23172487A JPS6475894A (en) 1987-09-16 1987-09-16 Method of cleaning heat exchanger

Publications (1)

Publication Number Publication Date
JPS6475894A true JPS6475894A (en) 1989-03-22

Family

ID=16928031

Family Applications (1)

Application Number Title Priority Date Filing Date
JP23172487A Pending JPS6475894A (en) 1987-09-16 1987-09-16 Method of cleaning heat exchanger

Country Status (1)

Country Link
JP (1) JPS6475894A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8876978B2 (en) 2008-02-14 2014-11-04 Mitsubishi Heavy Industries, Ltd. Method for regenerating gas turbine blade and gas turbine blade regenerating apparatus
CN104406452A (en) * 2014-11-14 2015-03-11 攀枝花钢企欣宇化工有限公司 Water scale cleaning method for nickel heat exchanger

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8876978B2 (en) 2008-02-14 2014-11-04 Mitsubishi Heavy Industries, Ltd. Method for regenerating gas turbine blade and gas turbine blade regenerating apparatus
CN104406452A (en) * 2014-11-14 2015-03-11 攀枝花钢企欣宇化工有限公司 Water scale cleaning method for nickel heat exchanger

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