Spray-type deaerator operating principle

The operation of the Spray-type deaerator delivered by KAMPS is based on physical deaeration which takes place in two steps:

Pre-deaeration in which water is sprayed in a part of the steam space;
Final-deaeration in the water tank where steam is brought in close contact with the water to be deaerated.
The pre-deaeration is achieved by the KAMPS-Stork spraying device. Under all kind operating conditions, the sprayer assures heating up of the condensate to saturation temperature and a very large area for mass transfer. As the solubility of oxygen in water at saturation conditions is practically zero, oxygen transfers from the water droplets to the surrounding steam. As the steam condensates on the water, the concentration of oxygen in the direct vicinity of the sprayer is increased making it possible to vent a small amount of steam with a relatively high oxygen concentration.

Final deaeration in the water tank is achieved by injection of steam in the water tank. Depending on the conditions of the heat source(s) used (steam, pressurized hot water, steam/water mixture) one (or more) types of steam rake(s) are chosen. A proper designed steam rake, taking into account the hydro-dynamics in the water tank, will result in good contact between water and steam, allowing the oxygen to move from the water to the steam in accordance with Henry's law.