Nitrogen oxide waste gas treatment method

The invention discloses an oxynitride waste gas treatment method, belongs to the field of air pollution treatment, and solves the technical problems of high investment, low efficiency and the like of the oxynitride waste gas treatment method in the prior art. The oxynitride waste gas treatment method comprises the following steps: (1) introducing oxynitride waste gas into a mixed solution of ammonium thiocyanate and urea with a certain concentration, and reacting to generate nitrogen, water and thiocyanic acid; (2) introducing ammonia gas into the solution generated by the reaction in the step (1), and reacting to generate ammonium thiocyanate; and (3) introducing ammonium thiocyanate generated in the reaction in the step (2) into the solution in the step (1), and circulating, so as to reduce the concentration of oxynitride in the waste gas. The method for treating the oxynitride waste gas has the characteristics of low investment, high efficiency, environment friendliness and high efficiency. 本发明公开了一种氮氧化合物废气