And that would have been pretty much that in the sense that there really are only two types of deaerators being utilized by industries far and wide. But of course, it is never so clear-cut and dried. Nevertheless, the tray type deaerator and the spray type deaerator are the two standard bearers widely used. But first this need to know information. The deaerator is a machine that removes oxygen, as well as other dissolved gases from liquids.
Where water is being filtered to form feed-water for steam-generating boilers, dissolved oxygen in this water has the potential to cause corrosive damage in the boiler by attaching to the walls of its metal lining. This is where the deaerator is required to perform one of its essential tasks. It is designed to remove the oxygen from the container down to levels of 7 ppb. It is also designed to remove carbon dioxide.
The use of the deaerator contributes to the quality and safety of products manufactured within the food, cosmetics, chemicals, personal care and pharmaceutical industries, to name but a few. Its use contributes towards increasing dosing accuracies during the filling process, increasing product life and preventing oxidative effects, the alteration of Ph and reducing packaging volumes. Oxidative effects include discoloration and changes in smell and taste.
The working principle of the deaerator relies on the solubility of gas in water that decreases as water temperatures rise and approach its saturation points. Within the deaerator, water will always be heated close to saturation temperature with minimal pressure drops and vents. When deaerating happens, feed-water is sprayed until a large surface area is created. This is often done by using multiple layers of trays.
This deaerating process also produces the scrubbing or stripping of steam.