Deaerator Tank
Deaerator Tank is used for separation of O2, CO2 gases which are present in steam boiler feed water and cause melting, puncturing (corrosion).
If the boiler feed water cannot be purified from these gases, the life of the whole system is shortened, corrosion and punctures may occur in the boiler and the devices and installations that make up the system even in very short periods. In addition, CO2 causes excessive corrosion especially in steam-using devices and serpentines and condensate pipes.
In order to purify the boiler feed water from O2 and CO2 gases, it must be degassed by passing through the degasser device.
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Deaerator Tank
What is a Deaerator Tank?
The deaerator tank is equipment designed to remove dissolved gases (O₂, CO₂, etc.) from boiler feedwater using physical or chemical methods, with the goal of protecting the system against corrosion. By creating an environment where steam and water are in direct contact, it helps eliminate unwanted gases from the water. Thus, the internal surfaces of boilers and other equipment are largely protected from corrosion. At Hisarmak Industrial Boiler Systems, we offer deaerator tanks with the right capacity and design to meet your operational needs, helping you reduce maintenance costs and prevent failures due to corrosion.Deaerator Working Principle
A deaerator operates mainly in two stages:- Heating and Gas Removal The feedwater entering the deaerator is first heated to a specific temperature. This heating process causes dissolved gases such as oxygen and carbon dioxide to separate from the water. Higher temperatures lower the solubility of gases in water, making it easier for gas molecules to transition into the vapor phase.
- Discharge of Gases The gases that have transitioned into the vapor phase are vented out of the system through a special discharge or exhaust line located at the top of the tank. Thus, the amount of corrosive gases in the feedwater is reduced to the desired level.
Why is a Deaerator Tank Needed?
- Corrosion Prevention: One of the major issues in boiler systems is corrosion. Water containing oxygen and carbon dioxide leads to rust and damage on metal surfaces over time, increasing repair and equipment replacement costs.
- Energy Efficiency: The deaerator tank supports the preheating of the water entering the boiler, thereby reducing fuel consumption and enabling energy savings.
- Extended Equipment Lifespan: With reduced corrosion, the frequency of equipment failure and maintenance decreases, contributing to efficient operation and a longer lifespan for the equipment.
- Operational Continuity: Reliable boiler operation is essential for uninterrupted production. The deaerator minimizes problems that could cause unexpected shutdowns in the steam system.
Advantages of the Deaerator Tank
- Low Oxygen and Carbon Dioxide Levels Reducing dissolved gases to targeted levels improves boiler performance.
- Reduction in Maintenance and Repair Costs Eliminating harmful gases significantly reduces failures caused by corrosion within the system.
- More Efficient Heat Transfer Reducing unwanted gases helps keep heat transfer surfaces clean, ensuring efficient steam production.
- Energy Savings Preheating the feedwater in the deaerator tank lowers the amount of fuel needed in the boiler, directly translating into cost savings.
- Easy Integration and Control With modern control systems, managing the deaerator tank is very easy. Automation allows continuous monitoring of water levels, pressure, and temperature.
Maintenance and Key Considerations
- Regular Cleaning: The internal surfaces of the tank and the connection lines must be cleaned periodically to prevent scale buildup, deposits, or rust accumulation.
- Inspection and Calibration: Temperature, pressure, and water level sensors should be regularly inspected and calibrated to maintain optimal system performance.
- Chemical Analysis: The quality of the feedwater should be regularly analyzed. If the oxygen or carbon dioxide levels exceed standards, the settings or operating conditions of the deaerator must be reviewed.
- Professional Support: Maintenance, repair, and improvements of the deaerator tank should be carried out with the support of professionals to minimize downtime and production interruptions.
