Abstract: Due to the tremendous effort involved in the NO_x control of thermal power industry in China, establishing the emissions trading system will be helpful to achieve the NO_x control goals on schedule. According to the actual situation of Chinese thermal power industry, this paper constructs a calculation model of the costs and benefits of NO_x control for thermal power plants, and deduces the calculation model of NO_x control optimal removal capacity, which can provide a theoretical basis for the strategic action choice of thermal power plants in the emissions trading. Finally, in this paper some proposals are put forward on completing the denitrification electricity policies.

Key words: thermal power enterprise, NOx control, energy saving and emission reduction, costs and benefits, emissions trading