EXHAUST GAS HEAT EXCHANGER
BOIXAC gas-gas heat exchangers are high-efficiency industrial systems for energy recovery, specifically engineered to operate with air, exhaust gases, process gases and combustion gases, guaranteeing 100% total tightness and absolute absence of cross-contamination.
Through an optimized cross-flow design for maximum thermal performance, these exhaust gas heat exchangers enable energy transfer between two completely separated gas streams, significantly increasing the overall energy efficiency of industrial processes.
Unlike conventional heat exchangers with expanded tubes, BOIXAC heat exchangers feature fully welded tubes, achieving true hermetic separation between gas streams. This makes them the optimal solution for contaminated gases, high-temperature applications and processes with strict safety, quality and environmental compliance requirements.
With thermal recovery efficiencies of up to 80%, these systems reduce energy consumption, minimize CO₂ emissions and accelerate return on investment (ROI) in industrial installations.
Competitive advantages of BOIXAC exhaust gas heat exchangers
BOIXAC gas-gas heat exchangers are specifically designed for industries with high energy demand, such as chemical, metallurgical, paper, food, ceramic, energy and agro-industrial sectors.
Recovering heat from hot exhaust gases allows preheating of clean air or other gas streams, reducing reliance on external energy sources and significantly improving overall system efficiency.
Key benefits
High energy savings and direct reduction of operating costs
Lower CO₂ emissions and improved environmental sustainability
Increased process efficiency and industrial competitiveness
Seamless integration with advanced control systems and Industry 4.0 environments
Industrial applications of exhaust gas heat exchangers
BOIXAC heat exchangers are ideal for processes involving large gas flows, high temperatures and demanding operating conditions:
Food industry: heat recovery in drying and dehydration processes
Paper industry: energy reuse from hot gases in ovens and dryers
Chemical and pharmaceutical industry: precise thermal control and recovery of process gas heat
Agriculture and greenhouses: improved energy efficiency in climate control systems
Ceramics, foundries and metallurgy: optimization of furnaces and industrial combustion processes
Technical innovation and key features
Modular and custom design
BOIXAC exhaust gas heat exchangers feature a modular, flexible and fully customized design, with single or multiple cross-flow configurations, adapted to each industrial process.
High-resistance materials
Manufactured from stainless steel or carbon steel, these units withstand high temperatures, aggressive gases and high fouling levels, ensuring long service life and minimal maintenance.
Accessible and efficient maintenance
Optional automatic spray cleaning systems and strategically positioned inspection and cleaning doors, reducing downtime. can also be integrated.
Energy efficiency and sustainability
With thermal recovery rates of up to 80%, these systems typically achieve ROIs between 3 and 12 months, directly contributing to industrial decarbonization goals.
Total tightness between flows
Thanks to fully welded tubes, a true 100% tightness is achieved, which is essential for contaminated gases and critical industrial processes.
Typical ROI
3-12 months
Efficiency
up to 80%
Warranty
2 years
Tightness
up to 100%
FAQs
Why choose BOIXAC for your exhaust gas heat exchanger?
BOIXAC delivers advanced gas-gas heat exchange solutions designed for the industry of the future:
High energy efficiency and reduced overall consumption
Operational reliability and low maintenance costs
Fully customized design for each project
Environmental compliance and emission reduction
International experience in metallurgy, chemicals, energy, refineries, pulp and paper, bioplastics, vegetable oils and fats, and advanced industrial processes
What is an exhaust gas heat exchanger?
An exhaust gas heat exchanger is a gas-gas heat exchanger that recovers energy from exhaust or combustion gases without direct contact between the gas streams.
An exhaust gas heat exchanger is an industrial energy recovery system that enables heat transfer between two completely separated gas flows, improving process efficiency without risk of cross-contamination.
How does it differ from a gas-liquid heat exchanger?
In an exhaust gas heat exchanger both fluids are gases, while in a gas-liquid exchanger one fluid is liquid.
Exhaust gas heat exchangers operate exclusively with gases, making them ideal for furnaces, dryers and combustion processes, whereas gas-liquid exchangers transfer heat to water or other liquids.
Is it suitable for contaminated gases?
Yes, thanks to its 100% tightness.
BOIXAC exhaust gas heat exchangers guarantee absolute separation between gas streams, allowing safe operation with contaminated or toxic gases.
What efficiency can these exhaust gas heat exchangers achieve?
Up to 80% thermal recovery.
Depending on the process, gas flow rates and temperatures, BOIXAC exhaust gas heat exchangers can achieve very high efficiencies, optimizing overall energy consumption.
What maintenance is required?
Simple and accessible maintenance.
They feature inspection doors, cleaning access points and optional automatic cleaning systems, reducing operating costs and production downtime.
Can they be custom-designed?
Yes, fully customized.
Each BOIXAC exhaust gas heat exchanger is designed according to flow rates, temperatures, available space and specific process requirements.
What materials are commonly used in exhaust gas heat exchangers?
Stainless steel or carbon steel, depending on the application.
Materials are selected based on temperature, corrosivity and operating conditions:
AISI 304: non-aggressive gases
AISI 316 / 316L: corrosive environments
AISI 309 / 310: high-temperature applications
Carbon steel: clean gases and controlled conditions
Material selection is always based on a detailed technical analysis, ensuring durability, safety and optimal thermal performance.
Ambient air preheating
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