Non-thermal plasma-induced flue gas cleaning: Fundamentals and industrial demonstration

Abstract

Non-Thermal Plasma (NTP) process has been investigated for the simultaneous removal of SO2,NOx and particles from coal-fired flue gas. A pilot NTP process integrated with bipolar corona pre-charging (BPC), electrostatic precipitation (ESP), ammonia-wet flue gas scrubbing (FGD) and wet non-thermal plasma precipitation(WPPCP) has been installed and tested with a 75 t/h industrial coal-fired boiler at the gas flow rate of 180, 000 m3/h. The BPC is used for both fine particle agglomeration and NO to NO2 oxidation. The wet NTP is used for both fine particle collection and S(IV) to S(VI) ions oxidation. The experiments showed that the removal of SO2 and NOx were approximately 99 and 80 %, respectively. This paper also discusses its possibility to use for 600 MW coal-fired generator.