Title :
NOx removal by a pipe with nozzle-plate electrode corona discharge system
Author :
Ohkubo, Toshikazu ; Kanazawa, Seiji ; Nomoto, Yukiharu ; Chang, Jen-Shih ; Adachi, Tokayoshi
Author_Institution :
Fac. of Eng., Oita Univ., Japan
Abstract :
The effects of additional gas composition on the corona discharge characteristics in a pipe with nozzle electrode system and the NOx removal characteristics for flue gases are experimentally investigated. The additional gas consists of a mixture of Na+O2+NH3 and a small amount of Ar or CO2, and is introduced to the flue gas stream from the pipe electrode through the corona discharging zone at the tip of nozzles. The results show that corona discharge characteristics and modes are significantly influenced by the composition of the additional gas mixture. Both NOx reduction rate and energy yield of NOx removal increase with decreasing corona discharge input power. NO reduction rate and energy yield can be optimized by the type of the additional gas mixture and the flow rates
Keywords :
air pollution detection and control; corona; electrodes; electrostatic precipitators; nitrogen compounds; nozzles; steam power stations; Ar; CO2; NO; NO reduction rate; NOx reduction rate; NOx removal; Na+O2+NH3; Na-O2-NH3; coal-fired power plants; electrostatic precipitators; energy yield; flow rates; flue gas stream; flue gases; gas mixture; nozzle-plate electrode corona discharge system; pipe; Aerosols; Argon; Chemicals; Corona; Electrodes; Electrostatic precipitators; Flue gases; Industry Applications Society; Plasma temperature; Power engineering and energy;
Journal_Title :
Industry Applications, IEEE Transactions on
