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pressurizing deaerator

pressurizing deaerator

pressurizing deaerator

Dear All
I want to know that why deaerator is pressurized. In my plant it is pressurized to 2.5 kg/cm2. what will happen if we pressurize it to 1.5 kg/cm2. Please give your inputs

RE: pressurizing deaerator

It probably depends on the feedwater/condensate temperature. Ours are operated at 2.5 PSI, but can operate up to 40 PSI.

RE: pressurizing deaerator

Hi Pradeep,

Oxygen solubility in water decreases with temperature. So it is better to have a higher boiler feed water / condensate temperature. However, higher temperature would lead to boiling of the boiler feed water / condensate. That would decrease the stripping action of the steam. The de-aerator is operated under some pressure just to increase the boiling point of water at the same time keeping it at a higher temperature.


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