Performance Characteristics of Pilot-Scale NOx Removal from Boiler Emission Using Plasma-chemical Process
NOx removal from a smoke tube boiler flue gas was investigated using a commercial ozonizer for indirect NO oxidation and a Na2SO3 chemical scrubber. The flue gas flow rate was in the range of 410 Nm3/h-1480 Nm3/h, the gas temperature of 185 ℃-325 ℃, and NOx concentration of around 40 ppm in city gas firing. Operational and performance data were obtained. The NOx removal efficiency was clearly dependent on the ORP, and increased inversely as the oxidation reduction potential (ORP) in the liquid decreased. To keep the specified NOx removal performance, it is essential to maintain the ORP properly by controlling additional Na2SO3 and NaOH solution injection. NOx emission of less than 4 ppm was attained at 410 Nm3/h for a 300 minutes system continuous operation by maintaining ORP of -30 mV and pH of more than 7.8.
Nox removal nonthermal plasma indirect plasma oxidation reduction potential Na2SO3
Hidekatsu Fujishima Tomoyuki Kuroki Atsuyoshi Tatsumi Masaaki Okubo Keiichi Otsuka Toshiaki Yamamoto Keiichiro Yoshida
Osaka Prefecture University,1-1 Gakuen-cho,Naka-ku,Sakai,Osaka,JAPAN Takao Iron Works Co.,Ltd.1-29-3 Shimae-cho,Toyonaka,Osaka,JAPAN Musashi Institute of Technology,1-28-1 Tamazutsumi,Setagaya-ku,Tokyo,JAPAN Japan Science and Technology Agency,Innovation Plaza Osaka 3-1-10 Techno-Stage,Izumi,Osaka,JAPAN
国际会议
11th International Conference on Electrostatic Precipitation(第11届国际电除尘学术会议)
杭州
英文
644-648
2008-10-15（万方平台首次上网日期，不代表论文的发表时间）