Patent Document ID: 4833622
Application ID: 06925936
Patent Flag: 1

Claim One:
1. A system for monitoring the chemistry of water and steam in a steam generator steam cycle to detect deviations thereof from specified levels, for diagnosing the need for corrections to be made in the chemistry of water and steam in the steam generator steam cycle, and for controlling the chemistry of water and steam in the steam generator steam cycle by implementing control corrections that are required to restore the chemistry of water and stem in the steam generator steam cycle to specified levels, comprising: (a) monitoring means for monitoring the chemistry of water and steam at a plurality of preestablished locations in the steam generator steam cycle so as to detect deviations in the chemistry of water and steam from specified levels, said monitoring means generating signals in the form of data provided from process instrumentation and in the form of data provided from samples obtained by means of continuous analyzers positioned at preestablished locations in the steam generator steam cycle representative of the chemistry of water and steam being monitored by said monitoring means, said continuous analyzers being positioned at a minimum of four preestablished locations in the steam generator steam cycle, a first one of said continuous analyzers being positioned at a first location in the steam generator steam cycle so as to provide data pertaining to conductivity of the feedwater of the steam generator steam cycle, a second one of said continuous analyzers being positioned at a second location in the steam generator steam cycle so as to provide data pertaining to a presence of ammonia, pH, hydrazine and dissolved oxygen in the feedwater of the steam generator steam cycle, a third one of said continuous analyzers being positioned at a third location in the steam generator steam cycle so as to provide data pertaining to the presence of pH, phosphate and silica in boilerwater of the steam generator steam cycle as well as data pertaining to specific conductivity of boilerwater of the steam generator steam cycle, and a fourth one of said continuous analyzers being positioned at a fourth location in the steam generator steam cycle so as to provide data pertaining to cation conductivity of steam of the steam generator steam cycle; (b) diagnosing means connected in circuit relation with said monitoring means for receiving signals from said monitoring means as an input to said diagnosing means, said diagnosing means having a preestablished bank of data stored therein pertaining to optimization of the chemistry of water and steam in a steam generator steam cycle, said diagnosing means in response to signals being received thereby from said monitoring means indicating deviations in the chemistry of water and steam in the steam generator steam cycle from specified levels establishing corrections that are required to be made in the chemistry of water and steam in the steam generator steam cycle to restore the chemistry of water and steam in the steam generator steam cycle to specified levels, said diagnosing means further when a need for such corrections in the chemistry of water and steam in the steam generator steam cycle is deemed to exist producing an output representative of the nature of corrections that are required to be made in the chemistry of water and steam in the steam generator steam cycle to restore the chemistry of water and steam to specified levels; and (c) control means connected in circuit relation with said diagnosing means for receiving said output therefrom, said control means having a preestablished bank of data stored therein pertaining to control of the chemistry of water and steam in a steam generator steam cycle, said control means upon receipt of said output from said diagnosing means establishing control corrections that are required to be made to the chemistry of water and steam in the steam generator steam cycle to restore the chemistry of water and steam to specified levels, said control means further effecting the implementation of control corrections that are required to be made to restore the chemistry of water and steam in the steam generator steam cycle to specified levels.