METHOD OF ENERGY SAVING IN PRODUCTION OF ALUMINIUM Russian patent published in 2008 - IPC C25C3/22 F27D17/00 

FIELD: power engineering.

SUBSTANCE: invention is related to method of energy saving in production of aluminium. In the method by heat of anode gases by means of evaporation-condensation utiliser with vacuum pump, water economiser and steam reheater water is heated and evaporated and water steam is reheated and sent to production and rotation of steam turbine together with generator that generates electric energy, and spent steam of steam-turbine cycle of steam-turbine plant is condensed in condenser, serially compressed upstream and downstream deaerator with condensate and feed pumps, besides, with nitrose component of anode gases synthesis is performed in complex of nitric acid preparation, and also hot air is removed by probe from electrolytic cell surface, at that with part of heat water is heated and evaporated in evaporating condensation heat utilizer at vacuum pulled with vacuum pump, steam is reheated in reheater and sent for production, and with remaining part of heat at first low boiling body that rotates turbine together with generator that generates electric current is reheated in evaporator that is the element of low-temperature cycle, and then condensed in condenser and sent back to evaporator with pump.

EFFECT: useful utilisation of heat exhausts and nitrose components of anode gases, and also heat exhausts through external surface of electrolytic cell.

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