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| Surplus energy reuse of circulating water power in alumina decomposition tank |
| Li Yanpin1,2, Ju Yang1, Yuan Shouqi2, Chen Dexin1 |
| 1.School of Electric Power, North China University of Water Resources and Electric Power, Zhengzhou, Henan 450011, China; 2.National Research Center of Pumps, Jiangsu University, Zhenjiang, Jiangsu 212013, China |
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Abstract To make full use of the large number of surplus energy in the circulating water system of alumina decomposition tank,and to provide technical support for energy recovery of other similar system, the characteristics of circulating water system of alumina decomposition tank have been studied. Based on the size of the system, different solutions of energy recovery have been put forward. The solution of using the surplus energy to generate electricity has been mainly focused. And in view of its peculiarities,the power generation device of the circulating water system in alumina decomposition tank was designed,which is called as the integrated power generation device for using the surplus of circulating water. A circulating water protection process was proposed to solve the problem that the circulating water should not be cut down unexpectedly. An issue named inverse power will be occurred in generator when the turbine discharge is smaller than that under non-load condition. Therefore, protection method for reverse power of generator was put forward, which included the generator excitation subsystem, speed control subsystem, synchronization subsystem and protect subsystem, all the subsystems of control and protect integrated together, forming the four unity comprehensive control panel.Practices have proved that the integrated power generation device for using the surplus energy of circulating water in alumina decomposition tank is safe,reliable and stable.
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Received: 30 September 2014
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