基于水力空化的过硫酸钠脱硝实验研究

张博浩; 卢凯旋; 杨金刚; 宋立国; 潘新祥; 韩志涛

doi:10.19693/j.issn.1673-3185.02179

基于水力空化的过硫酸钠脱硝实验研究

doi: 10.19693/j.issn.1673-3185.02179

张博浩^1,,
卢凯旋¹,
杨金刚¹,
宋立国^1, ,,
潘新祥^{1, 2,},
韩志涛¹

1.
大连海事大学轮机工程学院，辽宁大连 116026
2.
广东海洋大学电子与信息工程学院，广东湛江 524088

基金项目: 国家自然科学基金资助项目（51709029，52071046）；中央高校基本科研业务费专项资金资助项目（3132018257，3132019354）

详细信息

作者简介:
张博浩，男，1994年生，硕士生。研究方向：船舶尾气脱硝。E-mail：526155708@qq.com

宋立国，男，1983年生，博士，副教授。研究方向：船舶尾气污染控制。E-mail：songliguo@dlmu.edu.cn

潘新祥，男，1964年生，博士，教授。研究方向：船舶与海洋工程。E-mail：panxx@dlmu.edu.cn

通信作者:
宋立国

中图分类号: U676.3
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- 被引次数: 0
出版历程
- 收稿日期: 2020-11-12
- 修回日期: 2021-01-07
- 网络出版日期: 2021-04-12
- 刊出日期: 2021-12-20

Experimental study on sodium persulfate denitrification based on hydrodynamic cavitation

1.
College of Marine Engineering, Dalian Maritime University, Dalian 116026, China
2.
College of Electronic and Information Engineering, Guangdong Ocean University, Zhanjiang 524088, China

基于水力空化的过硫酸钠脱硝实验研究由张博浩，等创作，采用知识共享署名4.0国际许可协议进行许可。

摘要

摘要: 目的为提高过硫酸钠（Na₂S₂O₈）湿法氧化脱硝的效率以及药品利用率，利用水力空化强化Na₂S₂O₈开展湿法氧化脱硝实验。方法探究水力空化强化Na₂S₂O₈脱硝的可行性，研究溶液温度、Na₂S₂O₈浓度、氯离子（Cl⁻）等因素对脱硝效果的影响以及相关机理。结果实验结果表明：水力空化产生的特殊环境有利于活化Na₂S₂O₈，提高脱硝效率，但整体脱硝效果不佳；在实验条件下，当温度从30 ℃升到80 ℃时，一氧化氮(NO)去除率从7%提升至43%；提高Na₂S₂O₈的浓度有利于提高NO脱除率；在高温工况下，提高Na₂S₂O₈的浓度对提高整体脱硝率的促进作用更明显；Cl⁻的存在可以极大地提高NO的脱除率，当Cl⁻浓度与Na₂S₂O₈浓度配比达到0.15∶0.1时，NO的脱除率高达94%。结论水力空化可促进Na₂S₂O₈去除NO的反应速率，Cl⁻在水力空化创造的特殊反应环境中能产生更多的氧化性物质，提高脱硝效果。
- 水力空化 /
- 过硫酸钠 /
- 脱硝 /
- 船舶废气
Abstract: Objectives In order to improve the efficiency of sodium persulfate (Na₂S₂O₈) wet oxidation denitrification and its utilization rate, wet oxidation denitrification experiments using hydrodynamic cavitation to enhance Na₂S₂O₈are carried out. Methods This paper explores the feasibility of using hydraulic cavitation to enhance Na₂S₂O₈ denitrification, and studies Na₂S₂O₈ solution temperature and concentration, chloride ions (Cl⁻) and other factors on denitrification effects and related mechanisms. Results The experimental results show that the special environment created by hydrodynamic cavitation is beneficial for activating Na₂S₂O₈ and improving its denitrification efficiency, but the overall denitrification effect is insufficient. Under the experimental conditions, when the temperature increases from 30 °C to 80 °C, the nitrigen oxide (NO) removal rate increases from 7% to 43%, showing that increasing the concentration of Na₂S₂O₈ is beneficial for increasing the NO removal rate. Under high-temperature conditions, increasing the concentration of Na₂S₂O₈ has a more obvious promotion effect on improving the overall denitrification rate. The presence of Cl⁻can greatly increase the NO removal rate. When the ratio of Cl⁻ concentration to Na₂S₂O₈ concentration reaches 0.15∶0.1, the NO removal rate reaches 94%. Conclusions Hydrodynamic cavitation promotes the reaction rate of Na₂S₂O₈ to remove NO. Cl⁻ produces more oxidizing substances in the special reaction environment created by hydrodynamic cavitation, thereby improving the denitrification effect.
- hydrodynamic cavitation /
- sodium persulfate /
- denitrification /
- ship exhaust gas

HTML全文

图 1 水力空化强化过硫酸钠脱硝系统

Figure 1. Hydrodynamic cavitation enhanced sodium persulfate denitrification system

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图 2 水力空化方式与鼓泡方式对比及溶液温度对处理后NO出口体积分数的影响

Figure 2. Comparison of hydrodynamic cavitation and bubbling mode and the influence of solution temperature on the volume fraction of NO outlet

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图 3 Na₂S₂O₈浓度对剩余NO体积分数的影响以及不同浓度条件下的气泡状态

Figure 3. The influence of Na₂S₂O₈ concentration on residual NO volume fraction and bubble state under different concentration conditions

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图 4 Cl⁻浓度对剩余NO体积分数的影响

Figure 4. The influence of Cl⁻ concentration on residual NO volume fraction

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参考文献(11)

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