臭氧氧化—钙法吸收工艺对烟气的同步脱硫脱硝

发布时间：2019-01-16 02:21

【摘要】：针对中国石化镇海炼化乙烯动力锅炉烟气的特点,进行烟气模拟,采用臭氧氧化—钙法吸收同时脱硫脱硝工艺处理模拟烟气。实验对比了单独脱硫和脱硝过程与同时脱硫脱硝工艺的脱硫、脱硝效果,探究了烟气在反应器中的停留时间、臭氧投加量和烟气含氧量对SO_2去除率和NO_x去除率的影响。实验结果表明:SO_2和NO的共存可促进污染物的去除;烟气停留时间延长,SO_2去除率提高,NO_x去除率先升高后降低;臭氧与NO摩尔比增加,NO_x去除率提高,SO_2去除率略有降低。综合考虑选择烟气停留时间3.4 s,烟气含氧量12%(φ),臭氧与NO摩尔比0.7,在此工艺条件下反应70 min,NO_x去除率为73.8%,SO_2去除率为74.1%。
[Abstract]:According to the characteristics of flue gas of Zhenhai steam boiler in Sinopec, flue gas simulation was carried out, and the simulated flue gas was treated by ozone oxidation-calcium absorption and simultaneous desulphurization and denitrification process. The effects of desulphurization and denitrification in separate desulfurization and denitrification processes were compared with those in simultaneous desulphurization and denitrification processes. The effects of residence time of flue gas in reactor, ozone dosage and oxygen content of flue gas on SO_2 removal rate and NO_x removal rate were investigated. The experimental results show that the coexistence of SO_2 and NO can promote the removal of pollutants, the residence time of flue gas is prolonged, the removal rate of SO_2 is increased, and the removal rate of NO_x increases first and then decreases. When the molar ratio of ozone to NO increased, the removal rate of NO_x increased and the removal rate of SO_2 decreased slightly. The retention time of flue gas was 3.4 s, the oxygen content of flue gas was 12% (蠁), the molar ratio of ozone to NO was 0.7, and the removal rate of 70 min,NO_x was 73.8% and 74.1% respectively.
【作者单位】： 中石化宁波工程有限公司;
【分类号】：X742

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