March 2013Analytical Instrumentation & Environmental Monitoring
Reliable, automatic on-line analysis of sodium in water and steam samples helps prevent damaging corrosion and deposits in power plant pure water systems and steam turbines. As a leader in meeting stringent deionised water quality requirements with other measurements, Mettler Toledo Thornton has expanded its portfolio to include sodium measurement, the key parameter for initiating regeneration of cation exchange resin and for assuring water purity.
The Thornton 2300Na sodium analyser offers a new design for a traditional measurement for pure water treatment and power cycle chemistry monitoring. This analyser provides assurance of water purity to minimise corrosion and maximise water production.
Sodium is responsible for corrosion in high-value turbine blades and other parts of the cycle. Early detection of contamination allows time for planning corrective action before condenser leaks enlarge and serious damage occurs. The design of the Thornton 2300Na sodium analyser is based on extensive instrumentation experience and is optimised to handle these measurement challenges.
The new sodium analyser uses a particularly simple automatic calibration method and also provides the ability to measure grab samples easily, in addition to measuring pressurised samples from process streams. Its implementation with an operator interface common to other parameters including conductivity, dissolved oxygen, pH, TOC and ORP makes it especially convenient for installation and operator training. According to Thornton’s senior product manager and power industry specialist David Gray, “This analyser’s automatic sensor recognition system is a ground-breaking measurement and maintenance concept that improves accuracy, simplifies sensor handling, enhances reliability and reduces sensor life-cycle costs.”
* Reagent addition confirmation by pH to secure consistent measurement results.
* Convenient grab sample measurement for additional samples and quality control checks from other areas of the plant.
* Simultaneous display of sodium, adjusted pH, temperature and calibration progress provides convenient analyser and sample status at a glance.
* Choice of enclosures: fully enclosed and lockable for dirty plant environments or partially-enclosed with accessible controls for clean sample rooms.
* Four analogue outputs for sodium, adjusted pH and temperature with choice of scaling to enable full integration into data acquisition or control systems.
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