| According to the current situation of NOX pollution, the theory andcharacteristic of several existing NOX pollution control measures are introduced,the mechanism of air oxidation of NO and absorption of NOX with severalsolutions are discussed in this Paper. In order to stimulate the real condition ofNOX waste gas expelled by chemical plants, industrial N2 and pure NO are mixedat different ratios in the experiment to get stimulated NOX waste gas with differentconcentration. NO in the waste gas is oxidized by O2 of the injected air in theoxidation tower, and the molar ratio of injected air to waste gas is 1:1. Oxidationtime is controlled by the flow rate of the waste gas and injected air. The relation ofconcentration of NOX, ratio of oxidation and time for oxidation is analyzed.Oxidized NOX gas is absorbed with urea solution, mixed solution of urea andhydrochloric acid, mixed solution of urea and sodium hydroxide, oil of vitriolrespectively with temperature range from 15~20℃. The absorptivity of NOX withdifferent solutions in packed column is thoroughly analyzed, essential data isobtained for the industrial application. Two feasible methods for the reduction ofNOX expelled by a chemical plant is proposed, one is air oxidation and absorptionof NOX with mixed solution of urea and sodium hydroxide, the other is airoxidation and absorption of NOX with oil of vitriol, a prediction of the equipmentswill be used in this project is made.
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