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A thermal deaerator is used for reducing the oxygen content of steam boiler feedwater. Without proper treatment, feedwater for steam boilers typically has a high oxygen content of 8-10 mg/l, which causes critical corrosion in the system.
Theory of operation
The condensate and the make-up water are mixed so that a temperature of 60-70°C is reached before conducted to the top of the deaerator. In the top of the deaerator the water is vaporized, so the gases can escape the layer that surrounds every single water molecule.
Steam is conducted to the bottom of the deaerator through a steam pressure reducing valve and steam injectors create the necessary turbulence in the water for an efficient deaeration. The excess gases are allowed to escape through a vent with a restriction.
A thermal deaerator from EUROWATER is available in 12 units with flow rates up to 40 m3/h and tank volume from 1,450 litres to 23,150 litres. The deaerator tank is made of steel with end-caps for higher pressure tolerance and constructed according to CE regulations.
The thermal deaerator works at an excess pressure of 0.2 bar, corresponding to a boiling point of 104oC.
All units come with standard documentation for easy installation, operation, and maintenance.
Thermal deaerator with dome.
Thermal deaerator with or without dome suitable for steam boilers supplied complete with fittings, i.e. steam pressure reducing valve and safety valve, level control, water level indicator, thermometer, and pressure gauge.
|Included in delivery||Not included|
|Thermal deaerator||Connecting pipe system|
|Steam pressure reduction valve||Support stand|
|Counter-mating flanges||Service valve|
Prevent the condensation of steam and loss of heat by insulating the deaerator, and in general all installations in contact with hot water. A deaerator type TA from EUROWATER can be supplied insulated with 100 mm of mineral wool covered by aluminium plate.