Utilization of the exhaust gas of the smelting process for cooling and heating applications
Aluminum smelting is a highly energy consuming industrial process. The process generates a large amount of the heat that leaves through the exhaust gas. The exhaust gas must be scrubbed of its contaminants before release to the atmosphere at the gas treatment unit exit. The scrubbing process is more effective if this gas is cooled before entering the gas treatment unit. The main objective of this project is to find a technical and economical method to cool the smelting process exhaust gas upstream of the gas treatment unit. An ejector heat driven system is proposed for cooling the exhaust gas by heat recovery, and for improving the overall plant efficiency.