Optimization of NaClO2 wet oxidation denitration conditions for flue gas from gas-fired boiler by response surface methodology

doi:10.14088/j.cnki.issn0439-8114.2023.01.011

Abstract

Abstract: In view of the excessive emission of nitrogen oxides from flue gas of gas-fired boiler, the process conditions of NaClO₂ wet oxidation denitration were studied. The effects of NaClO₂ concentration, pH, solution temperature and empty tower gas velocity on the denitration rate in NaClO₂ wet oxidation denitration process were studied. The response surface method was used for the experimental design. Taking the NO_x removal rate as the response value, the mathematical model between the factors and the response value was established, and the interaction among the influencing factors was analyzed. The results showed that NaClO₂ mass concentration, pH and empty tower gas velocity had significant effects on NO_x removal rate（P<0.05）, and there was significant interaction between NaClO₂ mass concentration and pH, as well as between pH and empty tower gas velocity（P<0.05）. The optimized process conditions were that the mass concentration of NaClO₂ was 1.2 g/L, the pH of the solution was 5.02, the reaction temperature was 59.86 ℃, and the empty tower gas velocity was 1.01 L/min.

Key words: flue gas from gas-fired boiler, NO_x, wet denitration, NaClO₂, response surface method

CLC Number:

X511

QIAN Li-li, ZHOU Hui-min, ZHU Meng-yu, XIA Feng-jie, ZHU Cheng-zhu. Optimization of NaClO₂ wet oxidation denitration conditions for flue gas from gas-fired boiler by response surface methodology[J]. HUBEI AGRICULTURAL SCIENCES, 2023, 62(1): 71-76.

References

[1] 姬海民,李红智,姚明宇,等. 低NO_x燃气燃烧器结构设计及性能试验[J]. 热力发电,2015,44(2):115-118.
[2] 王静贻,高庆有,徐熙,等. 亚氯酸钠溶液烟气脱硝与烟气余热回收的一体化试验[J]. 环境科学研究,2017,30(11):1754-1760.
[3] 何雷晶,武斌,陈葵,等. Fe³+强化NaClO₂溶液脱硝过程研究[J]. 化工环保,2019,39(6):653-659.
[4] ADEWUYI Y G, SAKYI N Y.Simultaneous absorption and oxidation of nitric oxide and sulfur dioxide by aqueous solutions of sodium persulfate activated by temperature[J]. Industrial & engineering chemistry research, 2013, 52: 11702-11711.
[5] FANG P,CEN C P,WANG X M,et al.Simultaneous removal of SO₂,NO and Hg⁰ by wet scrubbing using urea +KMnO₄ solution[J]. Fuel process technology, 2013, 106: 645-653.
[6] 郑德康,韩志涛,杨少龙,等. UV辐照强化NaClO₂溶液脱硝实验研究[J]. 化学工程,2017,45(2):45-49.
[7] QI Y F,GE P L, WANG M T, et al.Experimental investigation and numerical simulation of simultaneous desulfurization and denitrification by H₂O₂ solution assisted with microwave and additive[J]. Chemical engineering journal, 2020, 391:123559[2020-07-01].https://doi.org/10.1016/j.cej.2019.123559.
[8] YAN J R, ZHOU F X, ZHOU Y, et al.Wet oxidation and absorption procedure for NO_x removal[J]. Environmental technology & innovation, 2018, 11: 41-48.
[9] 李杰豪,金月祥,成一波,等. NaClO₂/ H₂O₂复合吸收剂同时脱硫脱硝实验研究[J]. 环境污染与防治,2016,38(1):64-68.
[10] HAO R L, ZHANG Y Y, WANG Z Y, et al.An advanced wet method for simultaneous removal of SO₂ and NO from coal-fired flue gas by utilizing a complex absorbent[J]. Chemical engineering journal, 2017, 307: 562-571.
[11] HAO R L, YANG S, YUAN B, et al.Simultaneous desulfurization and denitrification through an integrative process utilizing NaClO₂/Na₂S₂O₈[J]. Fuel process technology, 2017, 159: 145-152.
[12] 刘雄,马雨,周文琦,等. 双膦配体拆分2-氯扁桃酸对映体性能研究[J]. 化学工程,2020,48(3):26-31.
[13] SADA E, KUMAZAWA H, YAMANKA Y, et al.Absorption of lean NO in aqueous slurries of Ca(OH)₂ with NaClO₂ or Mg(OH)₂ with NaClO₂[J]. Chemical engineering science, 1979, 34: 719-724.
[14] CHEN T W, CHU H, HSUEN H T.Kinetic study on absorption of SO₂ and NO_x with acidic NaClO₂ solutions using the spraying column[J]. Journal environment engineering, 2003, 129(11): 967-974.
[15] HAO R L, WANG X H, LIANG Y H, et al.Reactivity of NaClO₂ and HA-Na in air pollutants removal: Active species identification and cooperative effect revelation[J]. Chemical engineering journal, 2017, 330: 1279-1288.
[16] 叶春波,涂先红,李朝恒,等. NaClO₂水溶液脱硝的工艺条件及机理[J]. 化学反应工程与工艺,2016,32(2):176-182.
[17] MA J, ZHAO Y, WEI Y.Performance and mechanism of oxidation, and removal of trace SeO₂ in flue gas utilizing a H₂O₂, NaClO₂, and Ca²+ slurry[J]. Environment science and pollution research, 2021, 28(31): 42934-42944.
[18] ZHAO Y, QIU W, SUN Z H.Removal of arsenic from flue gas using NaClO/NaClO₂ complex absorbent[J]. Chemical engineering research & design, 2019, 144: 505-511.
[19] GONG P J, LI X X.Promoting effect of H+ and other factors on NO removal by using acidic NaClO₂ solution[J]. Energies,2019, 12(15):2966.
[20] 张浩,党小庆,于瑞,等. NaClO₃电解液对工业废气中NO_x的去除[J]. 环境工程学报,2021,15(1):236-244.
[21] 周鑫,邱鸣慧,罗平. 陶瓷膜接触器化学吸收氮氧化物的传质过程与阻力分析[J]. 化工学报,2020,71(8):3652-3660.

Optimization of NaClO₂ wet oxidation denitration conditions for flue gas from gas-fired boiler by response surface methodology

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