A coal-fired boiler exhausts 60,000 m3/h of 180 C flue gas. EN159 recovered heat with a heat-pipe unit and supported white-smoke elimination (de-whitening).
The Challenge
The flue gas at 180 C carried large heat and condensed into visible white plume in cold weather. Recovery had to handle corrosive, dusty gas without fouling.
Why Heat Pipe Air-to-Air Recovery
Boiler flue gas is hot, corrosive, and dusty. Heat pipes handle it with separated streams and no rotating seal to foul; a de-whitening coil condenses and recycles the plume. Rotary wheels are excluded due to fouling and corrosion.
The EN159 Solution
EN159 heat-pipe modules with condensing section, 60,000 m3/h, feedwater preheated from 20 C to 95 C, corrosion-resistant alloy walls, 4 degree tilt, white-smoke elimination coil.
Measured Results
- Recovered heat: about 1.4 MW
- Feedwater preheated from 20 C to 95 C
- Boiler fuel cut by 17 percent
- Visible plume eliminated in cold weather
Compliance and Selection Notes
Heat-pipe recovery with condensing de-whitening, separated streams. Rotary wheel excluded for flue gas.
Frequently Asked Questions
Does it remove the white plume?
The condensing coil captures the moisture that forms the visible plume, supporting de-whitening.
Why no rotary wheel?
Flue gas fouls and corrodes wheel seals; separated heat-pipe recovery avoids that.
Related Guides and Tools
Heat Pipe Heat Exchangers · Boiler Flue Gas Heat Recovery · Industrial Waste Heat Recovery · Flue Gas Whitening Plate · Heat Exchanger in a Boiler · Contact EN159
Get a Site-Specific Recovery Estimate
Talk to an EN159 application engineer about your coal boiler flue gas exhaust stream. Call 15753355505 or visit our contact page for a site-specific recovery estimate.