SO2 removal from industrial flue gases using pulsed corona discharge

Abstract

This paper gives the main parameters of the generator and reactor system for SO₂ removal with gas flow rates of 1,000–3,000 Nm³/h using pulsed corona discharge. During the design, establishment and operation, the system has been improved in many aspects, i.e. the insulation treatment of the system, the realization of the high energy pulse formation and transmission, and the optimization of the pulsed corona characteristics etc.. Finally, the preliminary results show that: with a gas flow rate of 1,400 Nm³/h, initial concentrations of 2000–2400 ppm of SO₂, gas temperature of 60–70 °C, resident time of 7s, and stoichiometric ratios of NH₃ to SO₂ among 1–1.1, 75–80% of SO₂ is removed at power consumption of 5–6 KW.