OXIDATION METHOD FOR SINTERING FLUE GAS DENITRIFICATION AND SYSTEM

摘要

An oxidation method for sintering flue gas denitrification. The method comprises: using an ozone plasma generator to discharge electricity into an oxygen source and generate plasma free radicals; and the plasma free radicals transforming NO in a flue gas into a nitrogen oxide with a higher valence state. The volume of the plasma free radicals produced is controlled according to the concentration of the flue gas. In a mixture of the oxygen source and a NO_x-containing flue gas, the mass ratio of NO to NO₃ is 0.8-1.5:1. The plasma free radical production volume of the ozone plasma generator is 6-12 kg/h for 30,000-50,000 Nm³/h of the NO_x-containing flue gas, realizing rapid oxidation and high denitrification efficiency. Using the ozone plasma for denitrification can achieve a higher NO_x denitrification rate and up to 98% NO_x removal rate. Further provided is a sintering flue gas denitrification system. The denitrification system comprises: a detection device, a flue gas intake device, an ozone plasma generator, a controller, a denitrification device, a spraying device, a desulfurization tower, and a flue gas discharging device. The controller is connected to the detection device, the flue gas intake device, and the ozone plasma generator. The denitrification device is connected to the ozone plasma generator and the flue gas intake device. The desulfurization tower is internally provided with the spraying device. The denitrification device is connected to the desulfurization tower. The flue gas discharging device is provided at a top end of the desulfurization tower.