Flue gas dryer for efficient biomass drying
Exergy flue gas dryers recover latent heat from boiler flue gases to pre‑dry biomass with low operating cost, simple mechanics and dependable performance in bioenergy and industrial boiler systems.
Pre‑dry biomass using waste heat from boiler flue gases, cutting fuel use and boosting boiler efficiency with robust Exergy flue gas dryers.
High‑efficiency waste heat utilization
Exergy Flue Gas Dryers are engineered to capture and reuse latent heat from hot boiler flue gases for cost‑effective biomass drying. Wet biomass is fed directly into the flue gas stream and transported through specially designed drying conduits, where short residence time allows effective moisture reduction without complex mechanics. By turning waste heat into useful drying energy, the dryer supports higher boiler efficiency, lower specific fuel consumption and improved overall plant economy.
Robust operation and low maintenance
The Exergy Flue Gas Dryer features few moving parts and a straightforward mechanical layout, which simplifies operation and keeps maintenance requirements low over the service life. Reliable feeding and discharge equipment combined with a high‑efficiency separation cyclone support stable throughput and predictable performance in demanding boiler environments. With its robust construction and long life-cycle, the dryer integrates seamlessly into existing boiler islands as a practical way to recover waste heat and upgrade low‑value biomass fuels.
The dryer consists of feeding and discharge equipment, a separation cyclone and drying conduits optimized for continuous handling of small‑particle biomass. Bio‑mass such as bagasse, grass and other agro‑residues is brought into direct contact with hot flue gases, enabling rapid heat transfer and partial drying along the gas path. The system is particularly suited as a pre‑dryer upstream of combustion, preparing fine fuels for stable firing and supporting higher electrical power production when used for boiler fuel.
Exergy Flue Gas Dryers are typically installed downstream of biomass boilers where flue gas temperatures and compositions are suitable for direct contact drying. They serve as pre‑dryers for small‑particle biomass streams such as bagasse, agro‑residues and other fine biofuels, improving combustion stability and enabling higher power output from the same boiler capacity. Swedish Exergy supplies complete dryers, spare parts and lifecycle support, assisting with integration, upgrades and optimization to match local fuels, boiler conditions and performance targets.
By utilizing waste heat already available in the flue gases, the dryer supports low carbon plant operation and reduced overall emissions per unit of energy produced. Typical benefits include:
- Use of waste heat from existing biomass or waste fired boilers
- Improved boiler efficiency and potential for higher electrical power output
- Reduced fuel consumption for the same energy production
- Few rotating parts and low maintenance costs
- Simple, robust design that is easy to operate
The dryer consists of feeding and discharge equipment, a separation cyclone and drying conduits optimized for continuous handling of small‑particle biomass. Bio‑mass such as bagasse, grass and other agro‑residues is brought into direct contact with hot flue gases, enabling rapid heat transfer and partial drying along the gas path. The system is particularly suited as a pre‑dryer upstream of combustion, preparing fine fuels for stable firing and supporting higher electrical power production when used for boiler fuel.
Exergy Flue Gas Dryers are typically installed downstream of biomass boilers where flue gas temperatures and compositions are suitable for direct contact drying. They serve as pre‑dryers for small‑particle biomass streams such as bagasse, agro‑residues and other fine biofuels, improving combustion stability and enabling higher power output from the same boiler capacity. Swedish Exergy supplies complete dryers, spare parts and lifecycle support, assisting with integration, upgrades and optimization to match local fuels, boiler conditions and performance targets.