鋁電解槽側部余熱高效回收技術工業試驗研究.

Efficient recycling and utilization of waste heat from aluminum electrolysis cells is one of the implementation paths for the aluminum electrolysis industry to achieve deep energy conservation and carbon reduction. In response to the technical bottleneck problem of difficult recovery of waste heat on the side of aluminum electrolytic cells, a dedicated heat exchange module for waste heat recovery on the side of the electrolytic cell has been developed. The flow rate of the heat exchange medium in the module has been optimized and controlled, and the heat extraction rate has been adjusted to ensure stable operation of the electrolytic cell without affecting it. The radiant heat on the side of the electrolytic cell shell has been efficiently recovered. The technology was tested in an industrial scale on a 200 kA test cell and the results showed that the overall operation of the aluminum electrolysis cell waste heat recovery system was stable and efficient, with an average heat recovery of 77 734 kJ/h, equivalent to 21.59 kW per hour, 317 kWh per ton of aluminum, and a heat recovery efficiency of 99.71%.The system has achieved stable, efficient, and precise regulation of heat recovery within the range of 18.44-21.59 kW/h, and can optimize and regulate the furnace, which is conducive to the long-term, efficient, and stable production operation of aluminum electrolysis cells. [ABSTRACT FROM AUTHOR]