Simultaneous removal of NOx and SO2 from glass furnace flue gas by ozone oxidation and spray tower
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摘要: 采用臭氧氧化结合湿法喷淋对模拟玻璃窑炉烟气开展了同时脱硫脱硝实验研究.采用不同溶液(NaOH、Na2S)进行了喷淋实验.结果表明,保证溶液pH值在10以上,NaOH浓度对NOx脱除效率无影响,SO2的存在促进了NOx吸收.当O3/NO物质的量比为1.6、溶液NaOH浓度为0.5%时,NOx脱除效率可达70%,SO2脱除效率在99%以上.往喷淋液中添加Na2S,NOx脱除效率随Na2S浓度增加而提高,SO2的存在对NOx脱除效率无影响.当O3/NO物质的量比为1.2、溶液中NaOH浓度为0.5%、添加剂Na2S浓度为0.6%时,NOx脱除效率可达70%,SO2脱除效率在95%以上.60 min长时间运行实验证明,模拟烟气中的NOx经碱液和添加剂吸收后主要以NO-2的形式存在于喷淋液中,且NOx脱除效率不随溶液pH值的变化而变化.Abstract: The experiment on simultaneous removal of NOx and SO2 from glass furnace flue gas by ozone oxidation and spray tower was carried out. The experimental results show that the concentration of the sodium hydroxide as the spray solution has less effect on NOx removal efficiency when pH is above 10, but SO2 in the flue gas greatly enhances the NOx removal. The NOx removal efficiency reaches 70% and the SO2 removal efficiency remains above 99% as the concentration of sodium hydroxide (NaOH) is 0.5% and the O3/NO mol ratio is 1.6. When sodium sulfide (Na2S) is added into the spray solution, the NOx removal efficiency is improved and increases with the concentration of Na2S. During this process, SO2 has no obvious influence on the NOx removal; the NOx removal efficiency reaches 70% and the SO2 removal efficiency remains above 95% as the concentration of NaOH and Na2S is 0.5% and 0.6%, respectively, and the O3/NO mol ratio is 1.2. Long-running experiments (60 min) indicate that NO is transformed into NO2- in the solution and the NOx removal efficiency does not change with the pH value of the spray solution.
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贾世昌. 浮法玻璃窑炉SCR脱硝技术的应用[J]. 环境科技, 2012, 25(1): 49-52.(JIA Shi-chang. Float glass furnace SCR DeNOx technology and instrument[J]. Environ Sci Technol, 2012, 25(1): 49-52.) 陈培国. 玻璃窑炉烟气脱硝SCR反应控制系统设计与研究[D]. 南京: 南京理工大学, 2012: 1, 2.(CHEN Pei-guo. The design and study of SCR control system of glass furnace flue gas[D]. Nanjing: Nanjing University of Science and Technology, 2012: 1, 2.) GB26453—2011, 平板玻璃工业大气污染物排放标准[S].(GB26453—2011, Emission standard of air pollutants for flat glass industry[S].) 徐娇霞, 丁明, 尤振丰, 夏建萍. 玻璃窑炉烟气脱硫脱硝除尘一体化技术探讨[J]. 玻璃, 2013, 5: 43-45.(XU Jiao-xia, DING Ming, YOU Zhen-feng, XIA Jian-ping. Discussion on integrated technique of desulphurization, denitration, and dust abatement technology of flue gas of glass furnace[J]. Glass, 2013, 5: 43-45.) 王雁林. 天然气浮法玻璃窑炉烟气除尘脱硝技术研究[J]. 中国高新技术企业, 2010, 16: 85-87.(WANG Yan-lin. The technology of SCR on floating glass furnace using natural gas[J]. China High Tech Enterpr, 2010, 16: 85-87.) 祝社民, 李伟峰. 烟气脱硝技术研究新进展[J]. 环境污染与防治, 2005, 27(9): 699-703.(ZHU She-min, LI Wei-feng. New development of controlling NOx pollution from plue gas[J]. Environ Pollut Control, 2005, 27(9): 699-703.) WANG Z H, ZHOU J H, ZHU Y Q, WEN Z C, LIU J Z, CEN K F. Simultaneous removal of NOx,SO2 and Hg in nitrogen flow in a narrow reactor by ozone injection: Experimental results[J]. Fuel Process Technol, 2007, 88(8): 817-823. 张相. 臭氧结合钙基吸收多种污染物及副产物提纯的试验与机理研究[D]. 杭州: 浙江大学, 2012: 47-74.(ZHANG Xiang. Experimental and mechanism investigation on multi-pollutant absorption by ozone with calcium based scrubbing and by-product treatment[D]. Hangzhou: Zhejiang University, 2012: 47-74.) 王智化. 燃煤多种污染物一体化协同脱除机理及反应射流直接数值模拟DNS的研究[D]. 杭州: 浙江大学, 2005: 91-92.(WANG Zhi-hua. Mechanism study on multi-pollution control simultaneously during coal combustion and direct numerical simulation of reaction jets flow[D]. Hangzhou: Zhejiang University, 2005: 91-92.) 尹海滨, 陈学功. 天然气浮法玻璃窑炉SCR脱硝技术工艺与应用[J]. 江苏建材, 2011, (3): 20-22.(YIN Hai-bin, CHEN Xue-gong. The technology and application of SCR on floating glass furnace using natural gas[J]. Jiangsu Build Mater, 2011, (3): 20-22.) TAKEUCHI H, ANDO M, KIZAWA N. Absorption of nitrogen oxides in aqueous sodium sulfite and bisulfite solutions[J]. Ind Eng Chem Process Des Dev, 1977, 16(3): 303-308. 张相, 朱燕群, 王智化, 张莉莉, 周俊虎, 岑可法. 臭氧氧化多种污染物协同脱及副产物提纯的试验研究[J]. 工程热物理学报, 2012, 33(7): 1259-1262.(ZHANG Xiang, ZHU Yan-qun, WANG Zhi-hua, ZHANG Li-li, ZHOU Jun-hu, CEN Ke-fa. Experimental research for multi-pollution control by ozone and by-product purification[J]. J Eng Thermophysics, 2012, 33(7): 1259-1262.) MOK Y S. Absorption-reduction technique assisted by ozone injection and sodium sulfide for NO removal from exhaust gas[J]. Chem Eng J, 2006, 118(1/2): 63-67. MOK Y S, LEE H J. Removal of sulfur dioxide and nitrogen oxides by using ozone injection and absorption-reduction technique[J]. Fuel Process Technol, 2006, 87: 591-597.
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