MANTRA Innovative Systems 2013

Tomorrow's Energy Solutions.
CERAMIC TILE MANUFACTURER INVESTS IN SELF-CLEANING HEAT EXCHANGER
Ceramic tiles are pressed as they pass through roller kilns. The kilns contain multiple burners arranged in a series of different zones, and generate a known waste heat. Because the exhaust from the burners contains harsh dust particulate with a high sulfur content, this waste heat has always been regarded as unusable. Previous attempts using conventional heat exchange technologies at this facility have failed to deliver a sustainable solution to utilize this valuable source.






SELECTION CRITERIA
TECHNICAL DATA
Exhaust temp in: 600 F
Exhaust temp put: 252 F
Combustion air temp in: 95 F
Combustion air temp out: 419 F
Exhaust mass flow: 11,773 ACFM
Combustion air flow: 9,615 ACFM
Energy recovered: 606 kW
Payback period: 6 months
SOLUTION
An innovative automatic cleaning system was proposed to combat the excessively high amounts of particulate emitted from the smoke stack. The system utilizes a moving plate within the heat exchanger that moves up and down the heat pipes ensuring no build up of particulate. The system deposits the dirt at the base of the heat exchanger and is then ejected through an aero-dynamic collection trap.
RESULTS
After eight months of continuous running the exchanger was found to be in perfect condition with no detectable degradations. The system was installed in 2008 and has required no maintenance or replacement pipes. The return on investment was 6 months.