Energy-saving aluminum electrolyzer

Abstract

The invention discloses an energy-saving aluminum electrolyzer. The energy-saving aluminum electrolyzer comprises an electrolyzer shell, an electrolyzer shell surrounding plate, an electrolyzer coverplate, end face angle plates and a furnace door, wherein surrounding plate heat dissipation holes are formed in the electrolyzer shell surrounding plate on the periphery of the electrolyzer shell andcomprise transverse surrounding plate heat dissipation holes and longitudinal surrounding plate heat dissipation holes, the end face angle plates are arranged on the plane where the furnace door is located, the transverse surrounding plate heat dissipation holes are covered with the electrolyzer cover plate in an electrolyzer space, the longitudinal surrounding plate heat dissipation holes are covered with the end face angle plates in the electrolyzer space, the side part is naturally cooled, and after air passes through the surrounding plate heat dissipation holes and enters the interior of the electrolyzer cover plate, the air and a gas generated through reaction in the electrolyzer enter a flue gas purification system together. According to the electrolyzer, part of heat dissipated fromthe side part can be transferred to the furnace surface in the electrolyzer, the defect that a large amount of cold air takes away the heat is overcome, it is guaranteed that the electrolyzer can have a certain degree of superheat under low voltage, production operation is stable, the purpose of saving energy substantially is achieved, comprehensive electricity consumption per ton of aluminum issaved by 500-1000 kWh, and the electrolyzer can be applied to newly-designed electrolyzer, and can be applied by changing the size of the electrolyzer cover by forming the surrounding plate heat dissipation holes in an original electrolyzer for realization.

Description

technical field [0001] The invention belongs to the technical field of electrolytic aluminum equipment, in particular to an aluminum electrolytic cell, in particular to an energy-saving aluminum electrolytic cell. Background technique [0002] In 2018, the global output of primary aluminum was 64.336 million tons, of which my country estimated about 36.5 million tons, while the energy consumption per unit output reached about 13,000 kWh / t. The annual electricity consumption of electrolytic aluminum in my country accounts for 6%-8% of the national power generation. Therefore, electrolytic aluminum Energy saving has always been one of the technical directions of the aluminum industry's joint efforts. About half of the high energy consumption of electrolytic aluminum is lost in the form of heat. For a 500KA electrolytic cell, it means that the heat loss rate is about 1000kW / h. As the electrolytic cell of an electrochemical metallurgical furnace, there are many heat dissipation ...

AI Technical Summary

Problems solved by technology

This patent transfers the heat absorbed by forced ventilation from the lower part of the tank to the upper part of the electrolytic tank to heat the tank chamber, which helps the electrolytic tank to establish a good heat balance under low voltage tank conditions and achieve energy saving goals, but forced ventilation is required, and the exhaust pipe and The design and engineering of forced ventilation flue is more complicated

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