Key Advantages of Installing an Economizer
- Improved Boiler Efficiency: This is the main benefit. For every 10°F (5.6°C) rise in feedwater temperature, boiler efficiency typically improves by about 1%. Overall, an economizer can improve boiler efficiency by 3% to 10%.
- Fuel Savings: With higher efficiency, you burn less fuel (natural gas, oil, coal) to produce the same amount of steam, leading to significant cost savings.
- Reduced Emissions: By burning less fuel, you directly reduce the emission of greenhouse gases (like CO₂) and other pollutants (like NOx and SOx).
- Reduced Thermal Stress: Pre-heated feedwater subjects the boiler to less thermal shock compared to injecting cold water, which can extend the boiler’s lifespan.
Where Are They Used?
Economizers are essential equipment in virtually any facility that uses a large boiler, including:
- Power Plants (both in HRSGs and conventional boilers)
- Industrial Plants (for process steam)
- Large Commercial Buildings (for heating)
- Marine Vessels (on large ships)