燃煤电厂烟气湿法同时脱硫脱硝技术研究
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摘要
我国大气污染仍以煤烟型污染为主,主要污染物为烟尘、SO_2和NO_x。以NaClO_2为吸收剂,系统地总结了SO_2和NO_x在NaClO_2中的反应机理。发现NaClO_2在pH值3～4之间产生的黄绿色ClO_2气体具有很强的氧化能力,并且说明了NaClO_2溶液脱硝原理主要源于ClO_2把NO氧化成NO_2,而NO_2的进一步吸收通过N_2O_3和N_2O_4的水解完成。而SO_2在NaClO_2中的吸收过程主要受气膜控制,据此探讨吸收剂液相同时脱硫脱硝的工业可行性。
The principal contaminants in coal smoke are mainly smoke dust,sulfur dioxide(SO_2),nitrogen oxide(NO_x) and so on.The mechanism of the simultaneous desulfuration and denitration using NaClO_2 was systematically summarized.The yellow-green ClO_2 gas which was made by NaClO_2 at the pH3～4 was found having a strong oxidation.The denitrification of the NaClO_2 solution was showed depending crucially on ClO20 xidation which could oxidase NO to NO_2,and the further absorption of NO_2 was counted as the via hydrolysis of the N_2O_3 and N_2O_4,while SO_2 absorption process in NaClO_2 was a gas controlled reaction.Based on the study of desulfurization tower reconstruction,the paper discusses the desulfurization and industrial feasibility.
The principal contaminants in coal smoke are mainly smoke dust,sulfur dioxide(SO_2),nitrogen oxide(NO_x) and so on.The mechanism of the simultaneous desulfuration and denitration using NaClO_2 was systematically summarized.The yellow-green ClO_2 gas which was made by NaClO_2 at the pH3～4 was found having a strong oxidation.The denitrification of the NaClO_2 solution was showed depending crucially on ClO20 xidation which could oxidase NO to NO_2,and the further absorption of NO_2 was counted as the via hydrolysis of the N_2O_3 and N_2O_4,while SO_2 absorption process in NaClO_2 was a gas controlled reaction.Based on the study of desulfurization tower reconstruction,the paper discusses the desulfurization and industrial feasibility.
引文
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[6]王琼,胡将军,邹鹏.Na ClO2湿法烟气脱硫脱硝技术的研究[J].江西电力,2004,28(6):14-16.
[7]郭天祥,赵毅,申思,等.基于鼓泡反应器的NO液相吸收模型[J].华东电力,39(5):788-792.
[8]Sandrine Colle,Jacques Vanderschuren and Diane Thomas.Pilotscale validation of the kinetics of SO2absorption into sulphuric acid solutions containing hydrogen peroxide[J].Chemical Engineering and Processing,2004,43(11):1397-1402.
[9]胡宇峰,薛建明.燃煤电站烟气中SO3对机组运行的影响及对策研究[J].电力科技与环保,2017,33(2):21-24.
[2]Chu,H.and Twu,B.W.The Kinetics of Simultaneous Absorption of NO and SO2from Flue Gas in a Stirred Tank Reactor With NaClO2/Na OH Solution[C].In:Proceedings of the International Conference on Acid Deposition in East Asia,Taipei,Tai Wan,1996.
[3]淳于菱.几种先进烟气脱硫技术综合性能评价及在我国应用前景分析[J].电力环境保护,2000,16(1):19.
[4]贺启坏,谢惠芳.稳定性ClO2溶液中ClO2存在形态的研究[J].工业水处理,2001,21(4):8-10.
[5]罗洁,陈建山.稳定性ClO2的应用研究进展[J].化工科技市场,2005,12(4):39-43.
[6]王琼,胡将军,邹鹏.Na ClO2湿法烟气脱硫脱硝技术的研究[J].江西电力,2004,28(6):14-16.
[7]郭天祥,赵毅,申思,等.基于鼓泡反应器的NO液相吸收模型[J].华东电力,39(5):788-792.
[8]Sandrine Colle,Jacques Vanderschuren and Diane Thomas.Pilotscale validation of the kinetics of SO2absorption into sulphuric acid solutions containing hydrogen peroxide[J].Chemical Engineering and Processing,2004,43(11):1397-1402.
[9]胡宇峰,薛建明.燃煤电站烟气中SO3对机组运行的影响及对策研究[J].电力科技与环保,2017,33(2):21-24.