Many other plants around the world have considerable difficulty with copper corrosion products plugging the narrow passages of the stator bars due to uncontrolled pH and dissolved oxygen levels. This is no longer a problem within Eskom.
Over the years, Mettler-Toledo Thornton instrumentation has safe-guarded the steam-water cycle chemistry, makeup water treatment, and generator-cooling systems of many of the plants powering South Africa. The unique multiparameter capability of the 770MAX transmitter offers online monitoring of all critical parameters and thus ensures water quality and saves costs.
Eskom, the primary electric company
South Africa has been a technological leader in energy production, from extensive development of synthetic fuels to innovative power plant configurations and operating techniques. Eskom is the primary electric company in South Africa with the responsibility to provide reliable, low-cost power throughout the country and beyond. It is one of the largest electric utilities in the world with over 35,000 MW of generating capacity. Eskom's power plant chemistry innovations are particularly noteworthy. South Africa has an abundance of coal in its northeast region, above Johannesburg although it is of a low grade. As a result, large 6-unit power stations are built next to the mines in that area to minimize coal transportation costs. However, water is in short supply in that region. To minimize water consumption, some of the plants are designed with dry cooling systems. There is no evaporation in the cooling towers which operate more like automobile radiators than conventional towers. Because of the constraints on these condensers, there are additional limitations on the cycle chemistry water treatment which raises the importance of reliable monitoring instrumentation.
South Africa has been a technological leader in energy production, from extensive development of synthetic fuels to innovative power plant configurations and operating techniques. Eskom is the primary electric company in South Africa with the responsibility to provide reliable, low-cost power throughout the country and beyond. It is one of the largest electric utilities in the world with over 35,000 MW of generating capacity. Eskom's power plant chemistry innovations are particularly noteworthy. South Africa has an abundance of coal in its northeast region, above Johannesburg although it is of a low grade. As a result, large 6-unit power stations are built next to the mines in that area to minimize coal transportation costs. However, water is in short supply in that region. To minimize water consumption, some of the plants are designed with dry cooling systems. There is no evaporation in the cooling towers which operate more like automobile radiators than conventional towers. Because of the constraints on these condensers, there are additional limitations on the cycle chemistry water treatment which raises the importance of reliable monitoring instrumentation.
THORNTON conductivity and ORP selected
Over a decade ago, Eskom was refurbishing cycle chemistry sample panels at the Lethabo Station. About the same time, THORNTON had introduced the 200CR conductivity instrument with the flexibility and accuracy needed in power industry applications - especially the accuracy of temperature compensation. Its value was recognized by Eskom personnel who evaluated and then specified it for Lethabo. The successful performance at this station was recognized and over several years the 200CR was included in upgrades at Kendal, Majuba, Matimba and Matla stations. They were also used in some of the makeup water treatment systems and in special portable modules used to verify on-line instruments……
Over a decade ago, Eskom was refurbishing cycle chemistry sample panels at the Lethabo Station. About the same time, THORNTON had introduced the 200CR conductivity instrument with the flexibility and accuracy needed in power industry applications - especially the accuracy of temperature compensation. Its value was recognized by Eskom personnel who evaluated and then specified it for Lethabo. The successful performance at this station was recognized and over several years the 200CR was included in upgrades at Kendal, Majuba, Matimba and Matla stations. They were also used in some of the makeup water treatment systems and in special portable modules used to verify on-line instruments……
Download:
| Would you like to get more information? Click here... |
