Water when in equilibrium with the atmosphere contains significant levels of gases, mainly carbon dioxide and oxygen. In several industrial applications the concentration of oxygen and carbon dioxide must be reduced to negligible levels either for process purposes or to prevent boilers and pipelines from severe corrosion.
The thermo-physical deaeration process is by far the most applied technology in the Boiler Feedwater Degassing when a reduction of oxygen to only a few parts per billion is required. Dissolved gases are removed by steam stripping, and the steam is moreover employed as heating medium because of the reduced solubility of gases at higher temperature.
Vacuum deaerators are employed when heating of water is not necessary and when steam is not available as a stripping medium. Typical applications are degassing of Injection Water in the upstream sector and in the degassing of make-up water in district heating.
With its own proprietary ZEROGAS® technology Cannon Artes has inherited the experience in the design of Deaerators that originated within the BONO Group in 1958.
The advantages of Cannon Artes’ deaerating processes are the following:
- An extremely efficient Mass-Transfer rate leads to the reduction of dissolved gases (oxygen, carbon dioxide, volatile compounds) in water to meet the most stringent specifications
- Efficient heating of the BFW to the required boiler temperature with a dramatic saving of the required steam.
- A very compact deaerating tower is obtained thanks to the efficient packing with a high “active area / installed volume” ratio.
- High reliability and low maintenance due to the implementation of 50 years of design and manufacturing experience in deaeration technology.