Deaerators

Deaerators

ENEVA deaerator systems are critical auxiliary equipment designed to remove dissolved gases (O₂, CO₂, etc.) from boiler feedwater using thermal methods, thereby reducing the risk of corrosion in boilers, steam, and condensate lines. A properly designed deaerator not only improves water quality but also increases boiler efficiency and extends equipment lifespan.

  • Removal of O₂ and CO₂ from feedwater
  • High feedwater temperature
  • Reduction of corrosion risk
  • Design compatible with boiler systems

WHAT IS A DEAERATOR?

Deaerators are thermal treatment systems in which non-condensable gases dissolved in boiler feedwater are removed by controlled heating of the water. These gases cause corrosion in boilers and steam/condensate lines, significantly reducing system lifespan.

ENEVA deaerators operate based on the principle of thermal deaeration to eliminate this risk.

  • Make-up water is distributed through spray nozzles and/or a staged tray (cascade tray) system located in the upper section
  • Water is heated to a defined temperature, releasing dissolved gases
  • The corrosive gas–steam mixture is discharged to the atmosphere in a controlled manner
  • Deaerated water is collected in the storage tank at the lower section

Controlled pressure drop in the vent line ensures stable operation, maximum gas removal efficiency, and prevents air ingress from the atmosphere.

  • Deaerator capacity: 1 – 200 t/h
  • Design pressure: Up to 6 barg
  • Oxygen removal level: Up to 7 ppb
  • Internal components: Fully stainless steel
  • Spray + staged tray combination
  • Vertical or horizontal storage tank options
  • Design in accordance with EN 13445 or ASME Sec. VIII Div.1
  • Compliance with PED 2014/68/EU and CE (if required)

OPTIONAL EQUIPMENT

  • Vent condenser (for heat recovery)
  • Valves and instrumentation
  • PLC-controlled automation panel
  • Thermal insulation or insulation clips
  • Third-party inspection and testing

Deaerator Systems – Technical Catalog (PDF)

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  • Deaerator sizing based on boiler capacity and operating scenarios
  • Optimized gas removal with spray + tray combination
  • Stainless steel internal components and tray housing design
  • Accessible and removable internal equipment for maintenance and cleaning
  • Integration of vent condenser for maximum heat recovery when required
  • Prevention of corrosion in boiler and steam lines
  • Reduced risk of low-temperature corrosion on the flue gas side of economizers
  • Prevention of thermal shocks during boiler feedwater supply
  • Reduction in chemical consumption