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Combined cycle On-Line Measurements - Mettler Toledo presentation by David Gray
Specific conductivity, cation conductivity, dissolved oxygen, redox, pH, sodium, silica and total organic carbon are all measured by MT instruments. Intelligent digital sensors have advantages. Optical DO offers faster measurement and less maintenance but polarographic offers measurement to lowest concentrations
Revision Date: 9/17/2014
Tags: 221112 - Fossil Fuel 化石燃料, Mettler Toledo, Monitoring Equipment, Sensor, Corrosion, Cycle Chemistry, Schematic, Water Treatment, Monitoring
A New Approach to On-line Sodium Measurement David Gray, Mettler-Toledo Thornton, Inc. Sodium has been a critical measurement parameter for ensuring water treatment performance and purity for nearly four decades. Monitoring cation exchange performance and the purity of makeup water, steam and condensate has benefitted from measurement of this key parameter. Many refinements have been made to the ion-selective electrode method for on-line sodium measurement for these applications. Described here are yet further improvements to this technology including an unique integrated electrode system that measures both sodium and pH to assure proper reagent delivery. The system design minimizes reagent consumption and reduces maintenance requirements well below current practice. The new sodium system uses a particularly simple automatic calibration method and also provides the ability to measure grab samples easily. Its implementation with an operator interface common to other parameters including conductivity, dissolved oxygen, pH and ORP makes it especially convenient for installation and operator training.
Revision Date: 4/14/2011
Tags: 221113 - Nuclear Electric Power Generation * , 221112 - Fossil Fuel 化石燃料, Mettler-Toledo Thornton, Monitoring, Water Treatment, Steam Cycle, USA