Analytical Instrumentation & Environmental Monitoring


On-line analysers for power chemistry applications

July 2019 Analytical Instrumentation & Environmental Monitoring

Efficient and reliable monitoring of low concentrations of various impurities in pure water treatment is critical for microelectronics and power cycle chemistry applications. Mettler Toledo Thornton offers a range of sodium, silica and chloride/sulphate analysers that use industry proven technology for ultrapure water monitoring at sub-ppb levels to ensure the highest quality water is delivered. Early detection of trace contamination is enabled with minimal operator supervision.

The Thornton sodium analyser is an on-line measurement system to ensure that water is not contaminated with sodium, which can be corrosive and damaging in processes that require pure or ultrapure water. They are often used in power plants for monitoring water cycle chemistry or in microelectronics manufacturing.

Thornton’s silica analyser uses colorimetric technology to identify silica contamination in pure water. Controlling silica is critical in power plants because silica carryover in steam can deposit on turbine blades, greatly reducing efficiency and causing imbalance of turbine blades. It is also very difficult to remove and can cause cracking and failure of turbine blades. Silica contamination in water used for microelectronics production processes can cause rejection of produced goods.

Thornton’s innovative chloride and sulphate analyser uses microfluidic capillary electrophoresis, an ionic separation technology, to directly measure trace levels of harmful sulphate and chloride ions. With on-line measurements every 45 minutes, the analyser automatically performs direct chloride and sulphate measurements in the water/steam cycle, allowing immediate detection of sample contamination. The most important point in the cycle is at the turbine inlet, to ensure that only acceptable levels of chlorides and sulphates enter with the steam into the turbine.

For more information contact Darren Prinsloo, Microsep, +27 11 553 2300, darren.prinsloo@microsep.co.za, www.microsep.co.za



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