deaeration

Low-pressure deaeration steam enters below the perforated trays and flows upward through the perforations.

Boiler feedwater enters the vertical deaeration section above the perforated trays and flows downward through the perforations.

The spray-type consists only of a horizontal (or vertical) cylindrical vessel which serves as both the deaeration section and the boiler feedwater storage tank.

The typical horizontal tray-type deaerator in Figure 1 has a vertical domed deaeration section mounted above a horizontal boiler feedwater storage vessel.

As shown in Figure 2, the typical spray-type deaerator is a horizontal vessel which has a preheating section (E) and a deaeration section (F).

This project also included the installation of five (5) access shafts/manholes structures and the installation of tangential inlet drop structure and associated Deaeration chamber and Appurtenances.

The purpose of the feedwater spray nozzle (A) and the preheat section is to heat the boiler feedwater to its saturation temperature to facilitate stripping out the dissolved gases in the following deaeration section.

Aseptic storage involves stripping the juice of oxygen, a process known as "deaeration," so the juice doesn't oxidize in the "tank farms" in which the juice sits, sometimes for as long as a year.