Advantages of Economizer (Boiler Economizer)
1. Improve Boiler Thermal Efficiency
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The economizer uses waste heat from the flue gas to preheat the feed water, increasing the water temperature entering the boiler.
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This reduces the fuel required for heating and achieves 5%–10% fuel savings.
2. Lower Flue Gas Temperature
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Effectively reduces the exhaust gas temperature at the boiler outlet, minimizing heat loss.
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For every 20°C drop in flue gas temperature, boiler efficiency increases by about 1%.
3. Reduce Fuel Consumption and Operating Costs
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Coal and biomass fuel consumption decreases, resulting in significant cost savings.
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Especially beneficial for biomass boilers where fuel cost is relatively higher.
4. Improve Boiler Operating Stability
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Higher and more stable feed water temperature entering the boiler helps maintain stable steam pressure.
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Reduces thermal stress and prolongs boiler service life.
5. Help Reduce Dust Emissions (Indirectly)
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Lower flue gas temperature improves the efficiency of downstream dust collectors and desulfurization systems.
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Useful for projects with strict environmental regulations.
6. Enhance System Reliability
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Reduces heat load on boiler pressure parts and protects heating surfaces.
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Extends the lifespan of the boiler and tail-heat recovery system.
7. Suitable for Multiple Fuels
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Applicable to coal, biomass, wood chips, rice husk, palm shell and other solid fuels.
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Particularly suitable for biomass boilers with high moisture and high volatile content.
