According to the Boilers Info website, deaeration is “[t]he process through which the dissolved gases are removed from the Boiler Feed water.” Deaerators are designed to reduce oxygen and carbon dioxide along with other gases from boiler feeder water in order to prevent corrosion of the boiler in steam systems. They also improve thermal efficiency by raising the water temperature. To make up a complete deaerator system, a boiler deaerator is combined with the appropriate Kansas city deaerator supplies.
Deaerator Working Principle and Designs
Deaeration relies on the principle that the solubility of a gas in water decreases as the water temperature increases and approaches saturation temperature. Deaerators consist of two types: spray and tray. Spray deaerators consist of a vertical domed deaeration section mounted on top of a horizontal cylinder. The cylinder serves as the storage tank for the deaerated boiler feedwater. Tray deaerators consist of a vertical or horizontal cylinder that serves as both the deaeration section and the storage tank.
Deaerator Supplies Complete the System
Deaerator supplies that are part of a complete system include the following:
- At least one relief valve to release excess pressure to protect against over-pressurization
- A pressure gauge to measure pressure of the steam space in the deaerator
- Thermometers to measure operating temperatures
- Control valves to control inlet water flow from one or more sources
- Level switches to indicate high or low water levels, actuate a pneumatic overflow valve and for boiler feed-pump cutoff
- Overflow control valves to prevent overflow from high water levels in the storage area
Gauge glasses may also be added to a system to visually indicate the water level in the tank.
By removing the corrosive gases in the boiler feed water, a deaerator system performs an essential function by greatly increasing the life of a steam system.