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Boiler Economizer
We engineer and supply Boiler Economizer as part of complete industrial heating and utility solutions. Share your capacity, fuel type, application, and site details — our team will recommend a suitable configuration and quote.
About Boiler Economizer
Gyantosh's Boiler Economizers recover heat from a boiler's exiting flue gases and use it to preheat the boiler feed water — recycling energy that would otherwise be lost up the chimney. It is one of the most cost-effective efficiency upgrades available for any boiler: every degree of feed-water preheat directly reduces the fuel the boiler must burn.
Installed in the flue-gas path downstream of the boiler, the economizer transfers heat from hot flue gas to feed water through a compact bank of finned or bare tubes. Typical installations improve boiler efficiency by around 4–6%, giving a fast payback through fuel savings — while also reducing flue-gas temperature and emissions.
Each economizer is engineered to the boiler's flue-gas volume, temperature, feed-water flow, and available draft, with tube material and fin design selected to suit the fuel and flue-gas characteristics (including protection against acid dew-point corrosion where required). Bare-tube designs suit dusty solid-fuel gas; finned designs maximise compactness on cleaner gas.
GyanTosh supplies, installs, and services economizers for new boilers and as retrofits to existing boilers, as part of complete balance-of-plant solutions, backed by over two decades of engineering experience.
Boiler Economizer Key Features
- Recovers flue-gas heat to preheat boiler feed water
- Typically improves boiler efficiency by ~4–6%
- Fast payback through fuel savings
- Bare-tube (dusty gas) and finned-tube (compact) designs
- Reduces flue-gas temperature and emissions
- Tube material selected against acid dew-point corrosion
- Engineered to flue-gas volume, temperature, and feed flow
- New-boiler and retrofit installation
- Robust construction for continuous operation
- Soot-blowing provision for dusty applications
- Compact modules to suit available space
- Integrates with the boiler feed and draft systems
Boiler Economizer Specification
Heat Recovery Technology
Hot flue gas leaving the boiler passes over the economizer tube bank, transferring heat into the feed water flowing inside the tubes.
Preheating feed water toward saturation reduces the heat the boiler must add, directly cutting fuel consumption for the same steam output.
Bare tubes suit dusty solid-fuel flue gas; finned tubes maximise compactness on cleaner gas — with materials chosen to resist acid dew-point corrosion.
Design keeps metal temperatures above the acid dew point (or uses suitable materials) to protect the economizer from cold-end corrosion.
Boiler Economizer Applications
Industries Served
Advantages of a Boiler Economizer
Recovering flue-gas heat to preheat feed water typically raises boiler efficiency by 4–6%, directly reducing fuel cost.
The fuel savings from an economizer usually give a short payback period, making it one of the most cost-effective boiler upgrades.
Reducing flue-gas temperature and fuel consumption cuts the boiler’s overall emissions and carbon footprint.
Material selection and dew-point management protect the economizer from cold-end acid corrosion for long life.
Compact modular designs can be retrofitted to existing boilers with minimal disruption.
Each economizer is sized to your flue-gas volume, temperature, feed flow, and fuel for optimum recovery.
Optional Accessories
Frequently Asked Questions(6)
What is a boiler economizer?
How much efficiency does an economizer add?
Can an economizer be retrofitted to my existing boiler?
What is the difference between bare-tube and finned-tube economizers?
What is acid dew-point corrosion and how is it avoided?
Does GyanTosh install and service economizers?
- Capacity / size requirements
- Process or application details
- Material preference (M.S / S.S where applicable)
- Installation location & delivery timeline
Share your capacity, fuel type, and application — we respond within 24 hours.
After it is installed
Equipment is the start of the relationship, not the end of it. We handle installation and commissioning, boiler AMC, retrofits, plant audits, spare parts and operator training — on equipment from any manufacturer, not only our own.
