Simultaneous removal of SO<sub>2</sub> and NO<sub>x</sub> by combination of ozone oxidation and Na<sub>2</sub>S<sub>2</sub>O<sub>3 </sub>solution spray

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Simultaneous removal of SO₂ and NO_x by combination of ozone oxidation and Na₂S₂O₃solution spray

更新时间：2025-12-10

- Simultaneous removal of SO₂ and NO_x by combination of ozone oxidation and Na₂S₂O₃solution spray
- CIESC Journal Issue 5, Pages: 2041-2047(2016)
- 作者机构：
  
  浙江大学能源清洁利用国家重点实验室,浙江,杭州,310027
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20151536
  CLC： 511
- Online First：05 May 2016，
  
  Published：05 May 2016
- 稿件说明：
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YANG Ye, XU Chaoqun, ZHU Yanqun, et al. Simultaneous removal of SO₂ and NO_x by combination of ozone oxidation and Na₂S₂O₃solution spray[J]. CIESC Journal, 2016, (5): 2041-2047. DOI: 10.11949/j.issn.0438-1157.20151536.
DOI：

YANG Ye, XU Chaoqun, ZHU Yanqun, et al. Simultaneous removal of SO₂ and NO_x by combination of ozone oxidation and Na₂S₂O₃solution spray[J]. CIESC Journal, 2016, (5): 2041-2047. DOI: 10.11949/j.issn.0438-1157.20151536. DOI：

摘要

采用臭氧氧化结合湿法喷淋硫代硫酸钠溶液的方法开展模拟烟气同时脱硫脱硝实验研究。结果表明

采用臭氧氧化结合Na2S2O3-NaOH溶液湿法喷淋可以实现NOx和SO2协同脱除:在O3/NO摩尔比为1.1～1.2时

溶液中Na2S2O3浓度的增加会提高系统的NOx脱除效率

烟气中SO2的存在会促进NOx的脱除

当SO2浓度为1030 mg·m-3、2.0%Na2S2O3溶液作为喷淋液时可实现较高的SO2脱除效率

同时NOx脱除效率可达70%以上;喷淋液pH在2.5～9范围内变化时提高浆液pH有利于NOx的脱除

当pH 9时脱硝效率可达75%。180 min连续同时脱硫脱硝实验结果表明

硫代硫酸钠可有效促进NOx的脱除

并实现SO2较高的脱除效率

同时可实现系统同时脱硫脱硝连续稳定运行

喷淋吸收后烟气中NOx的主要转化产物为NO2-

该方法作为一种有效的同时脱硫脱硝技术

具有一定的工业应用推广前景。

Abstract

Ozone oxidation and Na2S2O3 solution spray was combined to remove SO2 and NOx simultaneously. This coupling was studied experimentally. The results show that: SO2 and NOx can be eliminated simultaneously; at O3/NO mole ratio 1.1—1.2

the NOx removal efficiency increases with increasing concentration of Na2S2O3; existence of SO2 can facilitate removal of NOx; the NOx removal efficiency reaches 70% with low emission of SO2 at Na2S2O3 concentration 2.0% and at SO2 gas concentration 1030 mg·m-3. Furthermore

the NOx removal efficiency is enhanced with the pH of solution from 2.5 to 9

and reaches 75% at pH 9. The result of 3 hours running experiment indicates that NOx and SO2 can be removed efficiently and simultaneously and the stable and continuous operation is possible

because sodium thiosulfate can facilitate removal of NOx and the NOx is dominantly converted into NO2-. This process could be an efficient approach for eliminating SO2 and NOx simultaneously and could have potential industrial application.

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