Forced heat transferring type aluminum electrolyzing groove

An aluminum electrolytic cell and electrolytic cell technology, applied in the field of aluminum electrolytic production, to achieve the effects of recycling waste heat resources, improving current efficiency and electrolytic cell life

Inactive Publication Date: 2013-12-25
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in order to further reduce the energy consumption of the electrolyzer and improve the energy utilization efficiency, we can only make a fuss about the utilization of waste heat, and the space for waste heat utilization is also very huge

Method used

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  • Forced heat transferring type aluminum electrolyzing groove
  • Forced heat transferring type aluminum electrolyzing groove
  • Forced heat transferring type aluminum electrolyzing groove

Examples

Experimental program
Comparison scheme
Effect test

experiment example 1

[0031] The reference technical data of this example is: 400kA electrolytic cell, the cell shell size is 22.0×4.5×1.5m, the cell voltage is 4.0V, and the current efficiency is 94%. If only the heat exchanger is installed on the side, then: the heat dissipation power of the side is 320kW, and the flow rate of heat transfer oil is 2.4m 3 / h, the inlet temperature of the heat transfer oil is 50°C, and the outlet temperature is 250°C. If the energy utilization rate of hot oil is 50%, then 1280kWh of electricity can be saved per ton of aluminum, and energy consumption can be reduced by 10%.

experiment example 2

[0033] The reference technical data for this example is: 300kA electrolytic cell, the size of the cell shell is 15.5×4.5×1.5m, the cell voltage is 4.0V, and the current efficiency is 94%. If the entire steel shell is equipped with a heat exchanger, the heat dissipation power is 390kW, and the flow rate of heat transfer oil is 2.9m 3 / h, the inlet temperature of the heat transfer oil is 40°C, and the outlet temperature is 240°C. If the energy utilization rate of hot oil is 50%, the electricity saving per ton of aluminum is 2062kWh, reducing energy consumption by 16%.

experiment example 3

[0035] The reference technical data for this example are: a series of 300kA electrolyzers, the number of cells is 100, the size of the cell shell is 15.5×4.5×1.5m, the cell voltage is 4.0V, and the current efficiency is 94%. If the entire steel shell is equipped with a heat exchanger, the heat dissipation power is 39000kW, and the flow rate of heat transfer oil is 290m 3 / h, the inlet temperature of the heat transfer oil is 40°C, and the outlet temperature is 240°C. If the energy utilization rate of hot oil is 50%, the electricity saving per ton of aluminum is 2062kWh, and the total annual electricity saving is 1.685×10 8 kWh, equivalent to 60,000 tons of standard coal.

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Abstract

A forced heat transferring type aluminum electrolyzing groove comprises an electrolyzing groove body. The forced heat transferring type aluminum electrolyzing groove is characterized in that a heat exchanger with heat transferring oil as a heat transferring medium is arranged outside an outer shell of the electrolyzing groove body. The inlet oil temperature, the outlet oil temperature and the flow of the heat transferring oil of the heat exchanger are controlled, the heat dissipating capacity of the electrolyzing groove is controlled, and therefore the heat balance of the electrolyzing groove can be controlled, the electrolyzing groove can operate under the stable heat balanced conditions all the time, the residual heat resources are effectively recovered, meanwhile, a good and stable electrolyzing groove inner shape can be formed, the current efficiency is improved, and the service life of the electrolyzing groove is prolonged.

Description

technical field [0001] The invention relates to aluminum electrolysis production technology, in particular to a forced heat transfer (energy-saving) aluminum electrolytic cell. Background technique [0002] Aluminum is produced by molten salt electrolytic alumina, and the molten salt electrolysis process of aluminum requires a large amount of electric energy. According to statistics from relevant departments: in 2012, the output of electrolytic aluminum in my country was 19.68 million tons, and the national average comprehensive AC power consumption of aluminum ingots was about 14,000 kWh / t.Al, at present, the electric energy consumed by my country's aluminum electrolysis industry accounts for 86% of the energy consumption of the entire non-ferrous metal industry, accounting for 5.5% of the country's total electricity consumption. Therefore, reducing the power consumption of aluminum electrolysis production has important energy-saving significance, which is in line with the ...

Claims

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Application Information

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IPC IPC(8): C25C3/08C25C3/20
Inventor 杨昇刘忠侠王明星蔡斌刘志勇宋天福李静邱跃武
Owner ZHENGZHOU UNIV
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