2017 Volume 11 Issue 9
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GONG Hui, WANG Xuesheng, CHEN Qinzhu, CHEN Shuo. Removal of SO2 and NO from flue gas by wet process of NaClO2/urea composite absorbent[J]. Chinese Journal of Environmental Engineering, 2017, 11(9): 5114-5121. doi: 10.12030/j.cjee.201610125
Citation: GONG Hui, WANG Xuesheng, CHEN Qinzhu, CHEN Shuo. Removal of SO2 and NO from flue gas by wet process of NaClO2/urea composite absorbent[J]. Chinese Journal of Environmental Engineering, 2017, 11(9): 5114-5121. doi: 10.12030/j.cjee.201610125
shu

Removal of SO2 and NO from flue gas by wet process of NaClO2/urea composite absorbent

  • 1.

    School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200237, China

  • Received Date: 28/11/2016
    Accepted Date: 20/10/2016
    Available Online: 26/08/2017
    Fund Project:
  • The experiment was performed to study the removal of SO2 and NO from the flue by NaClO2/urea composite absorbent in the spray tower designed by ourselves,the mechanism of removal of SO2 and NO from the flue gas by NaClO2/urea composite absorbent was analyzed. The results indicated that SO2 was absorbed liquid absorption process was divided into two parts,a part of SO2 dissolved in water was oxidized to SO42- by NaClO2, another part of the SO2 dissolved in water and reacted with urea and oxygen to generate (NH4)2SO4. NO which was insoluble in water was oxidized into NO3- by NaClO2 and then absorbed by urea,NO was reduced to environmentally friendly gas N2. Furthermore,the experiments mainly explored the effect of NaClO2 concentration,urea concentration,SO2 inlet concentration,NO inlet concentration,initial pH value and temperature on the removal efficiency of NO,optimize the process conditions,the average removal rate of SO2 and NO were 100% and 95.2%, respectively when the absorption liquid NaClO2 concentration was 4 mmol·L-1,urea concentration was 0.5 mol·L-1,the initial pH was 7,the temperature was 50℃.
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    2. 魏凯，李冬，邹鹏，龚泽儒，蒋玉琳，郑艳丽，王晓娜. 船舶废气脱硫脱硝技术研究综述. 船舶物资与市场. 2022(01): 73-77 .
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    5. 姜平，马素霞，孙淑君，杨秉川，王杰，崔荣基. ClO_2/尿素溶液同时脱硫脱硝实验研究. 化学工程. 2020(06): 11-15 .
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    沈阳化工大学材料科学与工程学院 沈阳 110142

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Removal of SO2 and NO from flue gas by wet process of NaClO2/urea composite absorbent

  • Received Date: 28/11/2016
  • Accepted Date: 20/10/2016
  • Available Online: 26/08/2017
Fund Project:

Abstract: The experiment was performed to study the removal of SO2 and NO from the flue by NaClO2/urea composite absorbent in the spray tower designed by ourselves,the mechanism of removal of SO2 and NO from the flue gas by NaClO2/urea composite absorbent was analyzed. The results indicated that SO2 was absorbed liquid absorption process was divided into two parts,a part of SO2 dissolved in water was oxidized to SO42- by NaClO2, another part of the SO2 dissolved in water and reacted with urea and oxygen to generate (NH4)2SO4. NO which was insoluble in water was oxidized into NO3- by NaClO2 and then absorbed by urea,NO was reduced to environmentally friendly gas N2. Furthermore,the experiments mainly explored the effect of NaClO2 concentration,urea concentration,SO2 inlet concentration,NO inlet concentration,initial pH value and temperature on the removal efficiency of NO,optimize the process conditions,the average removal rate of SO2 and NO were 100% and 95.2%, respectively when the absorption liquid NaClO2 concentration was 4 mmol·L-1,urea concentration was 0.5 mol·L-1,the initial pH was 7,the temperature was 50℃.

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