An industry scale corona-plasma for flue gas DeSO2/DeNOx technique by high frequency AC+DC power supply with a semi-wet flow

An Industry Scale corona-plasma system for coal-fired flue gas DeSO₂/DeNO_x technique by AC+DC (AC superimposed DC) power supply with a semi-wet flow is introduced in this paper. The design of an AC + DC power supply is presented in detail. A wet reactor system can be used to overcome the disadvantage of the great power-consumption and viscid resultant on the wall of the pulse mode. The semi-wet technological process with the resultant of (NH₄)₂SO₄ and NH₄NO₄ is the first time to be used for flue gas DeSO₂/DeNO_x in an industry scale using corona-plasma with a perfect industry flow. The experiments were carried out on the corona-plasma flue gas DeSO₂/DeNO_x system with a capacity of 12,000 Nm³/h under the following conditions: gas temperature at the reactor entrance of 135??C, gas temperature at the reactor exit of 90??C, the power supply´s parameters is 40 kVpp/48kHz AC voltage and 40kV DC voltage. The experiments of DeSO₂ and DeNO_x were implemented simultaneously, 98% of SO₂ and 44% of NO_x are removed with an energy consumption of 1.8Wh/Nm³ and the final products are qualified fertilizer. It has an expectable industrial application in the future.