Deaerator Tank

About Deaerator Tank

A deaerator tank is a type of pressure vessel used primarily in steam generation systems to remove dissolved gases, especially oxygen and carbon dioxide, from water. Removing these gases is crucial to prevent corrosion and other issues in boilers and steam systems. Heres an overview of how deaerators work and their key components:

Function

1. Gas Removal: The primary function of a deaerator is to reduce the concentration of dissolved gases in water. Oxygen and carbon dioxide can cause corrosion in boiler systems and other components. Deaerators work to remove these gases to protect the integrity and efficiency of the system.

2. Water Heating: Deaerators also preheat the feedwater, which improves the efficiency of the boiler system.

Types of Deaerators

1. Tray-Type Deaerators: These deaerators use multiple trays or stages to allow water to flow over them while steam rises through the trays. The steam helps to remove the dissolved gases from the water.

2. Spray-Type Deaerators: In these deaerators, water is sprayed into a chamber where it comes into contact with steam. The contact between the water and steam facilitates the removal of dissolved gases.

Key Components

1. Deaeration Chamber: The main part of the deaerator where the water and steam interact.
2. Steam Spray Nozzles: These nozzles introduce steam into the water to aid in gas removal.
3. Vent Valve: Allows the expelled gases to be vented out of the system.
4. Level Controls: Monitor and maintain the appropriate water level within the deaerator.
5. Temperature and Pressure Sensors: Ensure that the deaerator operates within the correct temperature and pressure ranges.

Operation

1. Water Inlet: Cold water enters the deaerator, where it is mixed with steam.
2. Steam Contact: The steam heats the water and helps to release dissolved gases.
3. Gas Venting: The released gases are vented out of the system.
4. Preheated Water: The deaerated and preheated water is then sent to the boiler or other parts of the steam system.

Benefits

1. Corrosion Prevention: By removing dissolved gases, deaerators help to prevent corrosion in boilers and piping.
2. Increased Efficiency: Preheating the feedwater can increase the efficiency of the boiler system.
3. Extended Equipment Life: Reducing the potential for corrosion and other issues can extend the life of equipment.

Maintenance

Regular maintenance is essential to ensure that a deaerator functions properly. This includes checking for leaks, ensuring that the steam and water flow rates are correct, and inspecting components like valves and sensors.

If you have more specific questions about deaerator tanks or their application in your system, feel free to ask