Performance Analysis of Induced Draft Fan Driven by Steam Turbine for 1000 MW Power Units

Jianling Deng, Feifei Liang, Yang Ding, Zhiping Yang, Gang Xu, Jizhen Liu

National thermal power engineering technology research center, North China Electric Power University, Beijing, China.

DOI: 10.4236/epe.2013.54B263                

Abstract

Boiler fan is the main power consumption device in thermal power units and the induced draft fan accounted for the largest proportion. Reducing the energy consumption rate of induced draft fan is the main path to reduce the power consumption rate of thermal power units. The induce fan driven by small turbine is greatly effective for reducing the power consumption rate and the supply coal consumption rate in large thermal power plant. Take 1000 MW power units for example, the selection of steam source for steam turbine were discussed and economic performance of the unit under different steam source was compared in this paper. The result shows that compared with the motor driven method, there is about 1.6 g/kWh decrease in supply coal consumption rate driven by the fourth stage extraction steam; whereas there is about 2.5 g/kWh decrease in supply coal consumption rate driven by the fifth stage extraction steam.

Keywords

Induced Draft Fan; Source Steam; Auxiliary Power Ratio; Supply Coal Consumption Rate; Investment Recovery Period

Conflicts of Interest

The authors declare no conflicts of interest.

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