The paper gives the main parameters for S0₂ removal with gas flow rates of less than 2 × 10⁴ Nm³/h by using pulsed corona process. This industrial-scale facility was constructed at the power plant of China's Science City in Mianyang,Sichuan Prorince. The results show that under such condition as：flue gas flow rate being less than 2 × 10⁴ m³/h, gas temperature being 65～70℃，water content in the gas being 10%，resident time being 6～10 seconds, stoichiometric ratio of NH₃ to SO₂ being about1： 1, power consumption to operate the pulse conora process being not larger than 5 Wh/Nm³, the SO₂ removal efficiency is about 85 % .