Chemical Feed for Boiler Feedwater Sample Clauses

Chemical Feed for Boiler Feedwater. The purpose of the chemical feed for boiler feedwater system is to protect the HRSGs from corrosion and scale formation. The system shall consist of the following major equipment for each HRSG: One (1) 100% polyphosphate injection pump/tank One (1) 100% oxygen scavenger injection pump/tank One (1) 100% amine injection pump/tank Chemical storage facilities Piping, valves, and appurtenances The chemical feed systems shall maintain water chemistry at acceptable conditions. An oxygen scavenger shall be fed to the condensate pump discharge for oxygen scavenging. Phosphate shall be fed to the HP boiler drum to maintain the desired level of phosphate concentration and metal passivation. Neutralizing amine shall be fed to the condensate pump discharge for neutralizing acid-forming gases and to maintain the desired pH. Each chemical feed system shall include a chemical feed pump with stroke adjustment which can be manually set to control the flow rate of chemical feed and, if needed, a timer which can be manually set to control the start time and run time of the pump. The chemical conditioning system for the HRSGs shall be sized to maintain the proper amount of chemical conditioning at the applicable full condensate flow rate. Each set of pumps shall be provided with suction strainers and connections for a portable calibration column. Materials for the chemical feed pumps shall be fully compatible with the chemicals handled and the system operating conditions.
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