There are two commonly used deaerators in the industrial space where manufacturing and processing work is being conducted. These are the standard spray type deaerator and the standard tray type deaerator. And this, briefly, is basically how it works.
The tray type deaerator is also known as a cascade type deaerator. It is vertical and domed in shape. Its deaerating section is mounted on the top of a horizontal cylindrical vessel. This vessel serves as the ‘deaerated boiler feed water storage tank’.
The deaeration section is mounted above the horizontal boiler feed water storage vessel. Boiler feed water enters this section above perforated trays. It then flows downward through perforations. Low pressure deaerating steam enters below the perforated trays. It then flows upward through these perforations. The tray type deaerator can also use what is known as a packed bed instead of perforated trays. This is done to provide good contact and mixing between steam and boiler feed water.
Steam strips dissolved gas from boiler feed water. It exits via a vent valve located at the top of the domed section. Deaerated water flows down into its horizontal storage vessel. Here it is pumped to the steam-generating boiler system. Low pressure heating steam enters the horizontal vessel. It does so through a sparger pipe. This pipe is located at the bottom of the vessel. This is done in order to keep the stored boiler feed water warm.
As far as the standard spray type deaerator goes, outcomes may be generally similar. But this is where these deaerators differ. In different industrial settings where processing and manufacturing work is being done, processes and results will be in accordance with the products being guided and the materials being used. They ultimately seek to preserve the integrity of products and its materials.