In order to remove or decrease level of Dissolved Carbon Dioxide (CO2), Degasser Unit is used. Degasser is an essential part of any Demineralization Plant (DM), where it removes dissolved carbon dioxide (CO2) in order to reduce the load on anion exchanger that further maximizes regeneration frequency. Degasser towers used in this process are made of FRP or Mild Steel or rubber lined coatings. The function of degasser tower is to remove carbonate ions by forming carbon-di-oxide. In degasser tower stream of water is poured from top & air is blown from bottom to top. With air pressure, the carbonic acid (H2CO3) present in the water dissociates into H2O and CO2.
H2CO3 = H2O + CO2
This CO2 can be released to the air.
The degasser tower has three main components: the tower, the blower and the sump. The tower is filled with pall rings to increase surface area that breaks up the falling column of water into a thin film and small drops. The blower forces a stream of upward flow of air through the water and out through the vent pipe. The sump receives the degasified water and stores it for a few minutes before it is pumped to the point of use.