Economizer
Shell & Tube Heat Exchangers
Recovered heat is typically used to preheat feedwater or process water, reducing fuel consumption.
About the Economizer
Recovered heat is typically used to preheat feedwater or process water, reducing fuel consumption.
Tanpera economizers are manufactured to project requirements with coiled tube bundles and flanged connections.
Efficiency and Fuel Savings
As a practical rule of thumb, every 20 °C drop in flue-gas temperature corresponds to roughly a 1% increase in boiler efficiency.
Therefore economizer size and target outlet temperature are determined by evaluating both energy gain and condensation / acid-gas corrosion risk together.
Condensation and Material Selection
When gas outlet temperature falls below a certain level, acid gases that cause corrosion begin to condense. In standard (non-condensing) applications, flue-gas temperature must not be reduced below this critical threshold.
In that case the economizer must be manufactured from stainless material; otherwise the corrosive effect of condensed water seriously shortens equipment life.
Investment and Incentives
Key Features
- 3%–15% increase in boiler / plant efficiency via flue-gas heat recovery.
- Rule of thumb: every 20 °C flue-gas temperature drop ≈ 1% efficiency gain.
- Coiled tube bundle; project-based capacity and connection design.
- 50–60 °C and stainless material for condensing natural-gas applications.
- Typical payback 3–24 months; potential suitability for VAP / EVÇED supports.
- Fuel savings in boiler, furnace, and power-generation plants.
Installation and Commissioning
During commissioning, leak tests, gas-side pressure drop, water-side flow/temperature adjustment, and verification of outlet gas temperature against the corrosion threshold must be performed. The Tanpera technical team provides on-site support and training.
After-Sales Services
The Tanpera service network provides spare coil / tube-bundle elements, gasket sets, and maintenance throughout the project life.
Our technical team works with project teams for on-site commissioning, operator training, and fault response.
- Periodic maintenance and fouling / cleaning planning
- Spare parts and gasket supply
- Commissioning, training, and on-site technical support
- Performance checks and operating recommendations
Frequently Asked Questions
It is a heat exchanger that recovers part of the heat from hot flue gases leaving a boiler or furnace before they go to the stack. Recovered heat typically preheats feed or process water, reducing fuel consumption; as the gas inlet–outlet temperature difference grows, the efficiency gain increases.
It typically increases boiler or plant efficiency by 3% to 15%. Practical rule: every 20 °C drop in flue-gas temperature means roughly a 1% boiler efficiency gain.
When gas outlet temperature falls below a certain threshold, acid gases condense and cause corrosion. In standard applications this threshold must not be crossed. In natural-gas condensing systems, 50–60 °C is possible; in that case the economizer must be manufactured from stainless material.
In Tanpera Economizer applications, typical payback is between 3 and 24 months. Actual time depends on fuel price, operating hours, and the temperature drop achieved.
Such efficiency applications may benefit from EVÇED VAP (Efficiency Improvement Project) supports. Eligibility and support amount are evaluated on a project basis.
They are used for flue-gas heat recovery in heat, steam, and electricity generation plants; industrial boiler rooms; furnaces; and chemical and food plants.
Flue-gas flow rate and composition, inlet/outlet temperatures, allowable pressure drop, target water flow/temperature, fuel type, and condensation risk are required. Tanpera’s engineering team performs material and capacity selection together.
Gas-side fouling and outlet temperature should be monitored regularly; in condensing systems, condensate drainage and stainless surface integrity must be checked. Periodic cleaning and performance measurement preserve efficiency.
You can download or view the relevant PDF documents from the Documents tab on the product page.
You can submit your project details via the Quote Form on the product page or contact our sales team at sales@tanpera.com.
