Reference is made in samples (condensate, boiler water and steam) originating from steam/water cycle of a Combined Cycle Power Plant, of 2GT+2SB+1ST configuration, having a max. net output of 811 MWe.
This query is related to the determination of CO2 content in Condensate and Low Pressure Superheated (LPSH) steam.
The Power Plant is equipped with a dearation/condenser in which the vacuum is broken during shut-downs. Therefore, they suspect that all condensate is contaminated with CO2. The quality of samples is being monitored by online analyzers.
Moreover, please note that they have measured ammonia leakage from the resin of the CC analyzer of the LPSH steam that contributes by approximately 0.5 microS/cm to the CC value.
Pls inform if you can provide an online analyzer model that can measure either the CO2 content in the samples or efficient degasified Cation Conductivity (CC).
If you need any measures, of pH & CC, I could provide.Nikos
Nikos,
The usefulness of degassed cation conductivity in monitoring steam purity is a lively topic (or at least it was several years ago). There’s a brief discussion of it in the Monitoring Steam Purity Part 1 application note that Joe Covey wrote earlier this year and I have attached.
About on-line measurement of trace carbon dioxide in water and degassed cation conductivity… We have nothing for the direct measurement of trace carbon dioxide, nor do we offer the boiler/condenser apparatus required to measure degassed cation conductivity. We do offer the conductivity sensors and analyzers, however. Sentry sells degassed cation conductivity apparatus. Johnson March probably does, also.
If you have additional questions, please let me know and I will forward to Joe.
LIQ-ANO-Power-Monitoring-Steam-Purity-2-160312.pdf