CALORIX™ direct-fire wastewater heating with biogas
In the CALORIX™ system, biogas is burnt at near atmospheric pressure in a combustion chamber, which is mounted in the center of a stainless steel tank and suspended from the roof. A burner on the roof of the tank projects a downward flame into the combustion chamber. The tank is partially filled with wastewater, with the hot flame tip staying just above the water’s surface.
Hot exhaust gases, are deflected by the water surface to the annular space around the central combustion chamber. Wastewater is sprayed around this vast, annular headspace for heating, thereby cooling the combustion chamber from the outside and cooling and washing the exhaust gases. The wastewater is circulated from the bottom of the tank to the headspace by a centrifugal pump and a set of non-clog spraying nozzles.