Selection of an effective chemical treatment program for heat recovery steam generators requires an analysis of the equipment provided, the operating requirements of the system, and the personnel and equipment available to control the water chemistry. This paper discusses the advantages and limitations of the various treatment approaches commonly employed, and provides a flow diagram to assist in selecting a suitable program for various HRSG system operating requirements.
KEY WORDS Heat Recovery Steam Generator (HRSG). Flow Accelerated Corrosion (FAC). Oxygenated Treatment (OT). All Volatile Treatment (AVT). Phosphate Treatment (PT). Equilibrium Phosphate Treatment (EPT). Congruent Phosphate Treatment (CPT). Polymer Caustic Treatment (PCT). Steam Purity.