Industrial-scale experiments of desulfuration of coal flue gas using a pulsed corona discharge plasma

The flow rate of flue gas in the industrial experiments was 3000 Nm/sup 3//h. The flue gas from the boiler burning coal was used. The influences of operating parameters on the efficiency of desulfuration (DeSO/sub 2/) were studied, which include the retention period of flue gas in the reactor, the initial concentration of SO/sub 2/ in flue gas, a mole ratio of NH/sub 3/ to SO/sub 2/ in the gas, the temperature of the gas, as well as the power consumption of pulsed corona discharges. The experimental results shown that the efficiency of DeSO/sub 2/ was above 80%, when the initial concentration of SO/sub 2/ was 1000 /spl sim/ 2000 ppm, the gas temperature was 60 /spl deg/C /spl sim/ 75 /spl deg/C, the retention period was more than 5.8 s, a mole ratio of NH/sub 3/ to SO/sub 2/ was 2 : 1, the water content in flue gas was above 6%, and he consumption was 2.5 /spl sim/ 3.5 Wh/Nm/sup 3/.