Combustion Engineering, Inc.

Ronald J Barto

Stephen L Goodstine

Frank Gabrielli

Nancy C Mohn

Frank A Noto

A system (10) particularly suited for employment for purposes of effectuating the monitoring, diagnosing and controlling of the chemistry of the water and steam in a steam generator steam cycle (46). The subject system (10) is operative to monitor water and steam quality at a number of critical locations (70,72,74,76) in the steam generator steam cycle (46). Based on the information gathered through such monitoring of water and steam quality, the subject system (10) is designed to be operative to provide diagnoses of potential causes of upsets in the steam generator steam cycle chemistry and to suggest corrective actions as appropriate. Furthermore, historical data is also readily available from the subject system (10) which can be utilized for identifying trends and for assessing the operational chemistry of the steam generator steam cycle (46) both on a short-term basis and on a long-term basis.

Intelligent chemistry management system

A method for determining the existence of phosphate hideout in a steam generating steam cycle (10) so that the nature of the impact of the phosphate hideout on pH and the PO.sub.4 concentration in the boilerwater of the steam generating steam cycle (10) can be ascertained. The subject method includes the steps of determining from the concentration of PO.sub.4 that is provided to the steam generating steam cycle (10) the input of PO.sub.4 to the steam generating steam cycle (10), determining the loss of PO.sub.4 from the steam generating steam cycle (10) that is attributable to blowdown and contamination and solubility, and thereafter determining as a result of subtracting from the input of PO.sub.4 to the steam generating steam cycle (10) the loss of PO.sub.4 from the steam generating steam cycle (10) whether there exists phosphate hideout and, if so, what the magnitude of the phosphate hideout is as well as what impact the phosphate hideout will have on the pH of and the PO.sub.4 concentration in the boilerwater of the steam generating steam cycle.

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West Hartford, CT, United States of America

Ronald J Barto