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A deaerator plant. A deaerator is a device that is used for the removal of dissolved gases like oxygen from a liquid. Thermal deaerators are commonly used to remove dissolved gases in feedwater for steam-generating boilers. The deaerator is part of the feedwater heating system.
This kind of heater will normally require a feed pump at both the feed inlet and outlet since the pressure in the heater is between the boiler pressure and the condenser pressure. A deaerator is a special case of the open feedwater heater which is specifically designed to remove non-condensable gases from the feedwater.
Diagram of boiler feed water deaerator (with vertical, domed aeration section and horizontal water storage section). The water is usually pressurized in two stages, and typically flows through a series of six or seven intermediate feed water heaters, heated up at each point with steam extracted from an appropriate extraction connection on the ...
A boiler feedwater pump is a specific type of pump used to pump feedwater into a steam boiler. ... The minimum flow usually returns to the tank or deaerator.
Less flow resistance, lower dissolved feedwater iron concentrations, FeOOH film is more stable, reduced boiler cleaning frequency - Disadvantages: Increased risk of FAC, a deaerator is required, more frequent chemical cleaning is required, hazardous chemicals (hydrazine) are used. A deaerator is required. Air leakage is more serious.
Stages 2→3: Water is heated to boiling in either a conventional boiler or a nuclear propulsion steam generator; Stages 3→4: Steam is expanded in the steam turbine to turn the ship's propeller and power the ship's turbine generators. Stages 4→1: Low pressure wet steam leaving the turbine is condensed in the (condenser. A high vacuum in the ...