【摘要】 研究采用酸性尿素溶液作吸收液还原吸收处理间歇性、高浓度氮氧化物废气,通过正交实验确定主要的反应工艺条件。在尿素浓度为10%,反应温度为30℃,停留时间5秒,PH值为2的条件下,废气中氮氧化物的吸收率在95%以上。同时设计每天3500立方废气治理设备一套,实践证明达到了GBl6297-1996大气污染物综合排放一级标准,具有处理费用低,无二次污染,去除效率高等特点。更多还原

【Abstract】 The method for removing nitrogen oxides from the high concentration exhaust gas produced during the manufacture of catalysts by batch process, uses acidic urea solution as an absorbent to reduce and absorb the nitrogen oxides. The experimental conditions were determined using the orthogonal test. Absorption of the nitrogen oxides exceeds 95% when using a 10% solution of acidic urea at 30℃ for five seconds. The design and manufacture of disposal equipment capable of treating 3500 m3 per day of exhaust gas has also been achieved. Initial results indicate that the concentration of contaminants in the treated exhaust gas meet the highest emission standards of air pollutants (GB 16297-1996). The method has the benefit of a high removal rate, with no harmful by-products and low cost.更多还原