该    This technology is jointly developed by Jiangsu Wisdom Engineering & Technology Co., Ltd., University of Kentucky, Southeast University and Nanjing University of Science and Technology. Active hydroxide radical produced by oxidizing agent is used to oxidize NO. The alkali liquor performs desulfurization and denitrification simultaneously in a single duel-cycling absorption tower. Meanwhile, a no-leakage separate gas-gas heat exchanger is used to keep the temperature of clean fuel gas higher than dew-point temperature and eliminate white smoke. The desulfurization and denitrification efficiencies of this technology are higher than 99% and 85% respectively. Compared to the conventional "SCR denitrification + WFGD desulfurization" combination process, the construction cost and operation cost of this technology are 28% and 19% lower, which realizes low-cost and high-efficiency desulfurization and denitrification of fuel gas in coal-fired boilers.