生物膜填料塔同时脱硫(SO_2)脱氮(NO_x)动力学研究
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摘要
研究运用3种动力学模型对生物膜填料塔同时脱硫脱氮的过程进行模拟研究,结果表明:生物膜内SO_2、NO_x的生化降解反应均为一级反应,且SO_2、NO_x在生物膜上的生化降解反应均为快速生化反应;依据吸附-生物膜理论及其动力学模型,对NO_x的出口质量浓度、生化去除量及净化效率进行模拟及对比验证表明,利用该理论建立的动力学模型模拟的理论值与实验值之间具有较好的相关性(相关系数在0.70~0.99);运用吸附传递生物降解机理及其动力学模型,对NO_x的出口质量浓度、生化去除量及净化效率进行模拟及对比验证表明,NO_x的出口质量浓度、生化去除量的理论值和实验值之间相关性较好,相关系数分别为0.99、0.89,而其净化效率的理论值与实验值之间的相关性不高(相关系数只有0.55).
In this study,three kinds of kinetic models were used to simulate the simultaneous desulfurization and denitrification process by biofilm-packing tower.The results indicated that the biochemical degradation reactions of SO_2 and NO_x in the biofilm were both the first-order reactions and fast-rate biochemical reactions. According to the Adsorption-Biofilm Theory and its kinetic model,the outlet mass concentration,biochemical removal and purification efficiency of NO_x were simulated and compared.The results indicated that there were good relativities between the theoretical and experimental values by applying this theory and its kinetic model( the correlation coefficients were in the range of 0.70—0.99).By applying the Adsorption-Transmittance and Biodegradation Mechanism and its kinetic model,the outlet mass concentration,biochemical removal and purification efficiency of NO_x were simulated and compared.The results indicated that there were good relativities between theoretical and experimental values of the NO_x mass concentration in outlet and biochemical removal by applying this theory and its kinetic model.The correlation coefficients of them were 0.99 and 0.89,but the relativity of purification efficiency between the theoretical and experimental values was not high( the correlation coefficient was only 0.55).
In this study,three kinds of kinetic models were used to simulate the simultaneous desulfurization and denitrification process by biofilm-packing tower.The results indicated that the biochemical degradation reactions of SO_2 and NO_x in the biofilm were both the first-order reactions and fast-rate biochemical reactions. According to the Adsorption-Biofilm Theory and its kinetic model,the outlet mass concentration,biochemical removal and purification efficiency of NO_x were simulated and compared.The results indicated that there were good relativities between the theoretical and experimental values by applying this theory and its kinetic model( the correlation coefficients were in the range of 0.70—0.99).By applying the Adsorption-Transmittance and Biodegradation Mechanism and its kinetic model,the outlet mass concentration,biochemical removal and purification efficiency of NO_x were simulated and compared.The results indicated that there were good relativities between theoretical and experimental values of the NO_x mass concentration in outlet and biochemical removal by applying this theory and its kinetic model.The correlation coefficients of them were 0.99 and 0.89,but the relativity of purification efficiency between the theoretical and experimental values was not high( the correlation coefficient was only 0.55).
引文
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[2]YANG Z Z,ZHANG Y Y,LIU L L,et al.Environmental investigation on co-combustion of sewage sludge and coal gangue:SO2,NOxand trace elements emissions[J].Waste Management,2016(50):213-221.
[3]张欢,钟鹭斌,陈进生,等.船舶尾气脱硫脱硝技术研究进展[J].化工进展,2016,35(11):3 650-3 657.ZHANG H,ZHONG L B,CHEN J S,et al.Review on desulfurization and denitration technologies for ship exhaust gas treatment[J].Chemical Industry and Engineering Progress,2016,35(11):3 650-3 657.
[4]刘勇,赵汶,刘瑞,等.化学团聚促进电除尘脱除PM2.5的实验研究[J].化工学报,2014(9):3 609-3 616.LIU Y,ZHAO W,LIU R,et al.Improving removal of PM2.5 by electrostatic precipitator with chemical agglomeration[J].CIESC Journal,2014(9):3 609-3 616.
[5]HUANG X M,DING J,JIA Y,et al.Kinetics of sulfite oxidation in the simultaneous desulfurizationy and idenitrification of the oxidation-absorption process[J].Chemical Engineering&Technology,2015,38(5):797-803.
[6]周荣明,汪豪,王克非,等.生物膜填料塔净化电厂烟气的实验研究[J].资源节约与环保,2014(6):46-47.ZHOU R M,WANG H,WANG K F,et al.Experimental study on purification of flue gas in power plant by biofilm-packing tower[J].Resources Economization&Environment Protection,2014(6):46-47.
[7]XU Y,HU J L,YING Q,et al.Current and future emissions of primary pollutants from coal-fired power plants in Shaanxi,China[J].Science of the Total Environment,2017,595:505-514.
[8]张杨,王瑞,彭国峰,等.湿法烟气脱硫脱硝技术在催化裂化装置中的应用[J].石化技术与应用,2015,33(3):239-241.ZHANG Y,WANG R,PENG G F,et al.Application of wet flue gas desulfurization and denitration technology in catalytic cracking unit[J].Petrochemical Technology&Application,2015,33(3):239-241.
[9]WASIUK D K,KHAN M A H,SHALLCROSS D E,et al.The impact of global aviation NOxemissions on tropospheric composition changes from 2005 to 2011[J].Atmospheric Research,2016(178/179):73-83.
[10]ZWOLINSKA E,GOGULANCEA V,SUN Y X,et al.A kinetic sensitivity analysis for the SO2and NOxremoval using the electron beam technology[J].Radiation Physics and Chemistry,2017,138:29-36.
[11]CHMIEL E,HERCOG J,MALINOWSKI M.Application of calcium propionate and ammonia water in denitrification and desulfurization of the flue gases[J].Przemysl Chemiczny,2017,96(2):338-340.
[12]YOON H J,PARK H W,PARK D W.Simultaneous oxidation and absorption of NOxand SO2in an integrated O-3 oxidation/wet atomizing system[J].Energy&Fuels,2016,30(4):3 289-3 297.
[13]姜阅,孙珮石,邹平,等.生物强化法提高生物塔烟气同时脱硫脱氮性能的实验研究[J].云南大学学报:自然科学版,2016,38(1):133-140.JIANG Y,SUN P S,ZOU P,et al.Experimental research on the purification of biofilm-packing tower by bioaugmentation technique on removal of SO2and NOxsimultaneously from flue gas[J].Journal of Yunnan University:Natural Sciences Edition,2016,38(1):133-140.
[14]魏中华,孙珮石,邹平,等.稀土元素对生物塔烟气同时脱硫脱氮的强化作用[J].环境工程学报,2016,10(4):1 893-1 899.WEI Z H,SUN P S,ZOU P,et al.Intensifying purification function of biofilm-packing tower by rare earth element on simultaneous removal of SO2and NOxfrom flue gas[J].Chinese Journal of Environmental Engineering,2016,10(4):1 893-1 899.
[15]王洁,孙珮石,王恒颖,等.生物法同时脱除烟气中SO2和NOx的模拟研究[J].武汉理工大学学报,2008,31(2):62-65.WANG J,SUN P S,WANG H Y,et al.Simulation study on biological method of purifying SO2&NOxin flue gas[J].Journal of Wuhan University of Technology,2008,31(2):62-65.
[16]孙珮石,杨显万.生物法净化低浓度挥发性有机废气的动力学问题探讨[J].环境科学学报,1999,19(2):154-158.SUN P S,YANG X W.Kinetics of purifying waste gases containing volatile organic compounds in low concentration by using the biological methods[J].Acta Scientiae Circumstantiae,1999,19(2):154-158.
[17]孙珮石,李晓梅,孙悦,等.生物膜填料塔净化低浓度甲醛废气的动力学模型研究[J].安全与环境学报,2007,7(6):31-34.SUN P S,LI X M,SUN Y,et al.Study on the kinetic model of bio-purifying formaldehyde waste gas in low concentration in a biofilm-packing tower[J].Journal of Safety and Environment,2007,7(6):31-34.
[18]杨玉龙,尹可航,陈思莳,等.化学催化-微生物法同时脱硫(SO2)脱氮(NOx)的动力学模型初探[J].科技创新导报,2012(21):27-29.YANG Y L,YIN K H,CHEN S S,et al.Study on the kinetic model of simultaneous desulfurization and denitrification by chemical catalysis and microbial method[J].Science and Technology Consulting Herald,2012(21):27-29.
[19]曹旭.生物过滤塔净化甲醛废气的动力学研究[J].环境保护与循环经济,2013,33(11):28-32.CAO X.Study on the kinetic of purifying formaldehyde waste gas by biofiltration[J].Liaoning Urban and Rural Environmental Science&Technology,2013,33(11):28-32.
[20]李国文,马广大,胡洪营,等.生物过滤塔降解挥发性有机物动力学模型[J].环境科学研究,2000,13(6):12-15.LI G W,MA G D,HU H Y,et al.Dynamic model on removal of volatile organic compounds(VOCS)by biofiltration[J].Research of Environmental Sciences,2000,13(6):12-15.