Successful development of energy flow optimization and intelligent control technology for aluminum reduction cell

Views:21830 Author:Site Editor Publish Time:2021-04-09 19:21:23 Orgin:Site

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On April 6, it was reported from the school of materials science and engineering of Zhengzhou University that Professor Liang Xuemin, together with Zhengzhou light Metallurgy Technology Co., Ltd. and Henan Zhongfu Industrial Co., Ltd., has completed the basic experimental research and the integration of industrial system development, the first set of department Tong was officially put into industrial operation in Zhongfu aluminum.

After the system is put into operation, the recovered heat energy, which accounts for about 10% of the total energy consumption of the electrolyzer, will be sent to the first station of the urban heating system through a 3km long heating pipeline. This marks the first time that the electrolytic aluminum industry efficiently gathers the heat energy lost by the electrolytic cell body through the energy flow optimization technology and applies it to the heating of urban residents, realizing the energy interconnection with the urban heat supply network. "It is a new way to save energy in China's aluminum electrolysis industry to recover the lost heat of the electrolytic cell and continue to put it into the heating system to give full play to the waste heat." Introduced by Liang Xuemin.

Electrolytic aluminum is a high energy consuming industry, which consumes 13000 ~ 14000 kwh of electricity per ton of electrolytic aluminum production. So far, the actual energy utilization rate of electrolytic aluminum is still less than 50%, and the other half of the energy is lost in the environment. Electrolytic aluminum is also a high carbon emission industry. At present, the carbon emission of electrolytic aluminum industry has exceeded 1 billion tons, accounting for more than 3% of the global total carbon emission.

In order to solve the above problems, Liang Xuemin's team began to explore the field of "energy saving at the output end" of electrolytic aluminum since 2008, and successively broke through the technical problems of thermal characteristics and energy flow optimization theory of aluminum reduction cell, efficient heat dissipation and accumulation of cell body, etc. Through international cooperation with Norway, Canada, the United States and other countries, after nearly four years of experimental development, they have successfully developed industrial electrolyzer heat collector and energy flow intelligent regulation equipment with independent intellectual property rights. At present, the energy flow optimization and intelligent control technology of aluminum reduction cell has completed the development of a complete set of technology and system, and entered the stage of industrial trial operation.

According to Liang Xuemin, the project team will carry out further research to obtain the thermal characteristics of the electrolytic cell through energy flow optimization, explore the limit optimization process of the operation of the electrolytic cell, and further tap the potential of "energy saving at the input end" of aluminum electrolysis. At the same time, the new concept of "energy saving at the output end" of aluminum electrolysis is established. On the basis of realizing interconnection with urban heat supply network, research is carried out step by step to develop new technologies and complete sets of industrial systems that extend the application field of "energy saving at the output end" of aluminum electrolysis to interconnection with industrial heat supply network, thermal power generation system, large industrial refrigeration and other large industrial user systems, so as to finally realize aluminum electrolysis The total target of energy saving is 8% ~ 10%.

Liang Xuemin said that the successful development and application of the technology will open up a new energy-saving way for China's aluminum electrolysis industry and provide technical support for China's aluminum industry to implement the national goal of carbon peak and carbon neutralization.

Source: China Chemical News