JPS5621696A - Preventive method of heat exchanger or the like from scale deposition - Google Patents

Preventive method of heat exchanger or the like from scale deposition

Info

Publication number
JPS5621696A
JPS5621696A JP9801279A JP9801279A JPS5621696A JP S5621696 A JPS5621696 A JP S5621696A JP 9801279 A JP9801279 A JP 9801279A JP 9801279 A JP9801279 A JP 9801279A JP S5621696 A JPS5621696 A JP S5621696A
Authority
JP
Japan
Prior art keywords
hot water
heat exchanger
amount
geothermal hot
excessive
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
JP9801279A
Other languages
Japanese (ja)
Other versions
JPS5948679B2 (en
Inventor
Ken Ando
Tooru Obonai
Terubumi Matsuda
Masaharu Kodera
Kiichi Nagaya
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.)
Hitachi Zosen Corp
Original Assignee
Hitachi Zosen 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 Hitachi Zosen Corp filed Critical Hitachi Zosen Corp
Priority to JP9801279A priority Critical patent/JPS5948679B2/en
Publication of JPS5621696A publication Critical patent/JPS5621696A/en
Publication of JPS5948679B2 publication Critical patent/JPS5948679B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Preventing Corrosion Or Incrustation Of Metals (AREA)

Abstract

PURPOSE: To prevent the scale deposition effectively and economically by adding a Ca2+ type compound at the inlet of a heat exchanger in an amount excessive to a stoichiometric amount against monomeric silicic acid in geothermal hot water in a specific molecular range.
CONSTITUTION: In heat exchanging with geothermal hot water by a heat exchanger, a Ca2+ type compound is added to the geothermal hot water at an inlet of the heat exchanger in an amount of 0.002W0.004mol/l excessive to a stoichiometric amount against the monomeric silicic acid in the geothermal hot water. If necessary, the pH value of the geothermal hot water is adjusted to 5W9 and said hot water is stoyed for 0.5W3hr, and, thereafter, by adding a Ca2+ type compound in an amount of 0.002W0.004mol/l excessive to a stoichiometric amount against a saturated dissolving amount of monomeric silicic acid at an inlet temp. of the heat exchanger, an adding amount is reduced to a large extent and the economization can be attained.
COPYRIGHT: (C)1981,JPO&Japio
JP9801279A 1979-07-31 1979-07-31 How to prevent scale from adhering to heat exchangers, etc. Expired JPS5948679B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9801279A JPS5948679B2 (en) 1979-07-31 1979-07-31 How to prevent scale from adhering to heat exchangers, etc.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9801279A JPS5948679B2 (en) 1979-07-31 1979-07-31 How to prevent scale from adhering to heat exchangers, etc.

Publications (2)

Publication Number Publication Date
JPS5621696A true JPS5621696A (en) 1981-02-28
JPS5948679B2 JPS5948679B2 (en) 1984-11-28

Family

ID=14207877

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9801279A Expired JPS5948679B2 (en) 1979-07-31 1979-07-31 How to prevent scale from adhering to heat exchangers, etc.

Country Status (1)

Country Link
JP (1) JPS5948679B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53145265A (en) * 1977-05-20 1978-12-18 Toshiba Corp Pulverulent body feeder

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6097186U (en) * 1983-12-08 1985-07-02 スミダ紙工株式会社 Inlaid paint for sales promotion

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53145265A (en) * 1977-05-20 1978-12-18 Toshiba Corp Pulverulent body feeder
JPS5761657B2 (en) * 1977-05-20 1982-12-25 Tokyo Shibaura Electric Co

Also Published As

Publication number Publication date
JPS5948679B2 (en) 1984-11-28

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Tvedt et al. CORROSION AND SCALE CONTROL USING AMINOPHOSPHONATE/MANGANESE PROGRAMS