Process chemistry monitoring at the HGP-A power plant: analytical results, process problems and modifications

Journal Article · Fri Oct 01 00:00:00 EDT 1982 · Trans. - Geotherm. Resour. Counc.; (United States)

OSTI ID:5390997

Thomas, D M

The HGP-A generator plant began operations on June 12, 1981 and came on-line on a continuous basis on March 1, 1982. During this period process problems were identified and, in most cases, plant modifications have eliminated the difficulties. Silica in the brine was stable at a pH 7.5, however, at a pH above 9.5 deposition of silica was triggered in a brine disposal system and required abandonment of the hydrogen sulfide abatement process originally proposed for the brine system. The steam phase sulfide abatement system for standby conditions was 90% effective, although superheat in the treatment system reduced abatement efficiency. Brine carryover through the separator was very low; however, scale deposition on the turbine blades resulted in substantial damage to the turbine. Non-condensable gases in the condenser were weakly partitioned into the liquid phase, and about 99% were carried into the off-gas treatment system which was found to be approximately 99% effective.

• Research Organization: Hawaii Institute of Geophysics, Honolulu, Hawaii
• OSTI ID: 5390997
• Journal Information: Trans. - Geotherm. Resour. Counc.; (United States), Vol. 6
• Country of Publication: United States
• Language: English

Related Subjects

15 GEOTHERMAL ENERGY
GEOTHERMAL FLUIDS
MONITORING
GEOTHERMAL POWER PLANTS
TURBINE BLADES
SCALE CONTROL
ANALYTICAL SOLUTION
BRINES
CHEMICAL ANALYSIS
GASES
MODIFICATIONS
OPERATION
POLLUTION ABATEMENT
SCALING
SILICA
SULFIDES
CHALCOGENIDES
CONTROL
FLUIDS
MINERALS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
POWER PLANTS
SILICON COMPOUNDS
SILICON OXIDES
SULFUR COMPOUNDS
THERMAL POWER PLANTS
150801* - Geothermal Power Plants- Design & Operation