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Subjects on geochemical technology for geothermal power plant. Chinetsu hatsudensho ni okeru kagaku kanri gijutsu ni kansuru shomondai. 1

Journal Article:

Abstract

This paper introduces the following technologies and countermeasures found to be successful in solving geochemical problems relating to the maintenance and management of geothermal power plants belonging to Kyushu Electric Power Co., Ltd. In controlling condensate properties,curtailment of pH fluctuation range by changing the injection point of NaOH,inactivation of sulphur bacteria by using chloramphenicol and prevention of slime loading of the condenser strainer by running of the cooling tower without make-up water were achieved. In the environmental countermeasures,it was concluded that Fe-ion injection method was most effective to remove As out of waste hot waters which are all reinjected into the underground formation now. By understanding the characteristics of the well eruption fluids,the attenuation mechanism of steam producing wells could be estimated, which were interference,re-eruption and degradation of the reservoir temperature caused by the reinjected hot waters. And the problems associated with the attenuation of steam producing wells have been solved fundamentally by taking proper countermeasures to eliminate the influence of reinjected hot waters. The atteunuation of reinjection well was found to be caused dominantly by silica loading at the permeable zone of wellbore and to be effectively solved by high temperature reinjection of the waste hot waters, controlling of  More>>
Authors:
Hirowatari, K [1] 
  1. Kyushu Electric Power Co. Ltd., Fukuoka (Japan)
Publication Date:
Apr 30, 1991
Product Type:
Journal Article
Reference Number:
NEDO-91-950443; EDB-91-138625
Resource Relation:
Journal Name: Chinetsu Enerugi (Geothermal Energy); (Japan); Journal Volume: 16:2
Subject:
15 GEOTHERMAL ENERGY; GEOTHERMAL POWER PLANTS; CONTROL SYSTEMS; GEOTHERMAL WELLS; OPERATION; REINJECTION; STEAM CONDENSERS; ARSENIC; REMOVAL; SCALING; SILICA; BACTERIA; CHLORAMPHENICOL; INACTIVATION; INJECTION; SODIUM HYDROXIDES; ALKALI METAL COMPOUNDS; ANTI-INFECTIVE AGENTS; ANTIBIOTICS; CHALCOGENIDES; CONDENSERS; DRUGS; ELEMENTS; HYDROGEN COMPOUNDS; HYDROXIDES; INTAKE; MICROORGANISMS; MINERALS; OXIDE MINERALS; OXIDES; OXYGEN COMPOUNDS; POWER PLANTS; SEMIMETALS; SILICON COMPOUNDS; SILICON OXIDES; SODIUM COMPOUNDS; THERMAL POWER PLANTS; VAPOR CONDENSERS; WELLS; 150801* - Geothermal Power Plants- Design & Operation
OSTI ID:
5359121
Country of Origin:
Japan
Language:
Japanese
Other Identifying Numbers:
Journal ID: ISSN 0286-1372; CODEN: JIEND
Submitting Site:
NEDO
Size:
Pages: 44-59
Announcement Date:
Nov 01, 1991

Journal Article:

Citation Formats

Hirowatari, K. Subjects on geochemical technology for geothermal power plant. Chinetsu hatsudensho ni okeru kagaku kanri gijutsu ni kansuru shomondai. 1. Japan: N. p., 1991. Web.
Hirowatari, K. Subjects on geochemical technology for geothermal power plant. Chinetsu hatsudensho ni okeru kagaku kanri gijutsu ni kansuru shomondai. 1. Japan.
Hirowatari, K. 1991. "Subjects on geochemical technology for geothermal power plant. Chinetsu hatsudensho ni okeru kagaku kanri gijutsu ni kansuru shomondai. 1." Japan.
@misc{etde_5359121,
title = {Subjects on geochemical technology for geothermal power plant. Chinetsu hatsudensho ni okeru kagaku kanri gijutsu ni kansuru shomondai. 1}
author = {Hirowatari, K}
abstractNote = {This paper introduces the following technologies and countermeasures found to be successful in solving geochemical problems relating to the maintenance and management of geothermal power plants belonging to Kyushu Electric Power Co., Ltd. In controlling condensate properties,curtailment of pH fluctuation range by changing the injection point of NaOH,inactivation of sulphur bacteria by using chloramphenicol and prevention of slime loading of the condenser strainer by running of the cooling tower without make-up water were achieved. In the environmental countermeasures,it was concluded that Fe-ion injection method was most effective to remove As out of waste hot waters which are all reinjected into the underground formation now. By understanding the characteristics of the well eruption fluids,the attenuation mechanism of steam producing wells could be estimated, which were interference,re-eruption and degradation of the reservoir temperature caused by the reinjected hot waters. And the problems associated with the attenuation of steam producing wells have been solved fundamentally by taking proper countermeasures to eliminate the influence of reinjected hot waters. The atteunuation of reinjection well was found to be caused dominantly by silica loading at the permeable zone of wellbore and to be effectively solved by high temperature reinjection of the waste hot waters, controlling of temp. degradation of hot waters to be reinjected and prevention of air mixing. After applying proper countermeasures, the attunuation rate of the reinjection well has been fairly improved. 13 refs., 21 figs., 2 tabs.}
journal = {Chinetsu Enerugi (Geothermal Energy); (Japan)}
volume = {16:2}
journal type = {AC}
place = {Japan}
year = {1991}
month = {Apr}
}