Method for treating high-sulfur nitrogen oxide waste gas
A technology of nitrogen oxides and treatment methods, applied in gas treatment, chemical instruments and methods, separation methods, etc., can solve problems such as high concentration and air pollution, and achieve the advantages of large amount of waste gas treatment, low energy consumption, and improved catalytic effect. Effect
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Embodiment 1
[0036] The high-sulfur nitrogen oxide waste gas produced by industrial production is dedusted by an electric precipitator to remove a large amount of dust. The high-sulfur nitrogen oxide exhaust gas after dedusting is preliminarily heated through a heat exchanger. During the first preliminary heating, the heat generated by gas combustion is passed into the heat exchanger to initially heat the high-sulfur nitrogen oxide exhaust gas. It exchanges heat with the high-sulfur nitrogen oxide exhaust gas that has been dedusted again, so a small amount of gas can be fed into the heat exchanger for combustion. The high-sulfur nitrogen oxide exhaust gas is initially heated to a temperature of 200°C, and then enters the electric heater for reheating. The temperature of the reheated high-sulfur nitrogen oxide exhaust gas is 280°C. The reheated high-sulfur nitrogen oxide waste gas is passed into the destocking device, and at the same time, ammonia water with a mass fraction of 20% is spraye...
Embodiment 2
[0038] The high-sulfur nitrogen oxide waste gas produced by industrial production is dedusted by an electric precipitator to remove a large amount of dust. The high-sulfur nitrogen oxide exhaust gas after dedusting is preliminarily heated through a heat exchanger. The high-sulfur nitrogen oxide exhaust gas is initially heated to a temperature of 220°C, and then enters the electric heater for reheating, and the temperature of the reheated high-sulfur nitrogen oxide exhaust gas is 290°C. The reheated high-sulfur nitrogen oxide waste gas is passed into the destocking device, and at the same time, ammonia water with a mass fraction of 20% is sprayed into the destocking device for reaction. The destocking device has a catalyst that promotes the reaction between ammonia water and nitrogen oxides in the exhaust gas. At high temperature, the nitrogen oxides in the exhaust gas are converted into nitrogen, which realizes the off-sales. Pass the destocked waste gas into the heat exchang...
Embodiment 3
[0040]The high-sulfur nitrogen oxide waste gas produced by industrial production is dedusted by an electric precipitator to remove a large amount of dust. The high-sulfur nitrogen oxide exhaust gas after dust removal is preliminarily heated through a heat exchanger. The high-sulfur nitrogen oxide exhaust gas is initially heated to a temperature of 250°C, and then enters the electric heater for reheating, and the temperature of the reheated high-sulfur nitrogen oxide exhaust gas is 300°C. The reheated high-sulfur nitrogen oxide waste gas is passed into the destocking device, and at the same time, ammonia water with a mass fraction of 20% is sprayed into the destocking device for reaction. The destocking device has a catalyst that promotes the reaction between ammonia water and nitrogen oxides in the exhaust gas. At high temperature, the nitrogen oxides in the exhaust gas are converted into nitrogen, which realizes the off-sales. Pass the destocked waste gas into the heat excha...
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