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Na2SO3/VC-Na体系的低温烟气脱硝性能

2025年05月02日 12:33  点击:[]



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文章编号: 1672-6987202502-0029-09 DOI 10.16351/j.1672-6987.2025.02.005


马聪a 楚长青b 孟彦孝a 贾文广a*青岛科技大学 a. 机电工程学院; b. 气候变迁与能源可持续发展研究院, 山东 青岛266061

摘要: 首先考察了硫代硫酸钠ST三乙醇胺TEA对苯二酚HQ和抗坏血酸钠VC-Na作为氧化抑制剂对Na2SO3脱硝性能的促进作用实验结果表明STTEAHQVC-Na均可不同程度上抑制烟气中的O2Na2SO3脱硝性能的不良影响添加抑制剂后Na2SO3溶液的平均脱效率分别比未添加前提高了5%ST15%TEA20%HQ32%VC-Na对实验完成后的Na2SO3溶液的离子色谱分析表明添加氧化抑制剂后的Na2SO3溶液中的含N离子总浓度均明显高于未添加抑制剂的Na2SO3溶液其中VC-Na具有最高的含N离子总浓度基于VC-Na出色的氧化抑制效果进一步研究了VC-Na的浓度处理烟气的含氧量脱硝剂温度等关键工艺参数对VC-Na抑制效果的影响结果表明提高VC-Na浓度能明显提高吸收体系的吸收能力和吸收容量而含氧量浓度的增加则会增大O2与液相中接触的频率进而加剧Na2SO3的氧化不利于脱硝过程碱性条件有利于VC-NaSO32-离子氧化过程中产生的自由基相结合阻断Na2SO3的氧化路径进而促进VC-Na的氧化抑制效果对比离子在Na2SO3溶液与Na2SO3/VC-Na溶液中的累积情况添加VC-Na可以切实有效的增强吸收和抑制SO32-的氧化


关键词: 湿法脱硝 亚硫酸盐氧化 抗氧化剂筛选 Na2SO3 抗坏血酸钠


中图分类号: TQ 09        文献标志码: A


引用格式: 马聪 楚长青 孟彦孝 . Na2SO3/VC-Na体系的低温烟气脱硝性能J. 青岛科技大学学报自然科学版 2025 462 29-37.


MA Cong CHU Changqing MENG Yanxiao et al. Study on the performance of low temperature flue gas denitrification with Na2SO3/VC-NaJ. Journal of Qingdao University of Science and TechnologyNatural Science Edition 2025 462 29-37.

Study on the Performance of Low Temperature Flue Gas Denitrification with Na2SO3/VC-Na

MA Conga CHU Changqingb MENG Yanxiaoa JIA Wenguangaa. College of Electromechanical Engineeringb. Institute of Climate Change and Energy Sustainable DevelopmentQingdao University of Science and TechnologyQingdao 266061China

Abstract The experimental results showed that ST TEAHQ and VC-Na could inhibit the adverse effect of in flue gas on denitrification performance to different degreesand the average denitrification efficiency of solution after the addition of inhibitors increased by 5%15%20%and 32%VC-Na respectivelycompared with that before the addition.The ion chromatographic analysis of the solutions after the experiments were completed showed that the total concentrations and of N-containing ions in the solutions after the addition of the oxidation inhibitor were significantly higher than those in the solutions without the addition of the inhibitorin which VC-Na had the highest total concentration of N-containing ions.Based on the excellent oxidation inhibition effect of VC-Nathe effects of key process parameters such as VC-Na concentrationoxygen content of treated flue gasdenitrifying agent temperature and pH on the inhibition effect were further investigated.The results show that increasing the concentration of VC-Na can significantly improve the absorption capacity and absorption capacity of the absorption systemwhile increasing the concentration of will increase the frequency of contact between the flue gas and in the liquid phasewhich will intensify the oxidation of which is not conducive to the denitrification process.Alkaline conditions favor the oxidation-inhibiting effect of VC-Na by combining with free radicals generated during the oxidation of ionsblocking the oxidation pathway of and thus promoting the oxidation-inhibiting effect of VC-Na.Comparing the accumulation of and ions in solution and /VC-Na solutionthe addition of VC-Na can effectively enhance the oxidation of absorption and inhibition.


Key words wet denitrificationsulfite oxidationantioxidant screeningNa2SO3 VC-Na

收稿日期: 2024-06-01

基金项目: 国家能源集团2030重大项目先导项目GJNY2030XDXM-19-12.4.

作者简介: 马聪1995—,男,硕士研究生.     * 通信联系人.


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