Simultaneous desulfurization and denitrification of sintering flue gas via composite absorbent

doi:10.1016/j.cjche.2016.04.005

›› 2016, Vol. 24 ›› Issue (8): 1104-1111.DOI: 10.1016/j.cjche.2016.04.005

• Energy, Resources and Environmental Technology • 上一篇下一篇

Simultaneous desulfurization and denitrification of sintering flue gas via composite absorbent

Jie Wang^1,2, Wenqi Zhong^1,2

1 Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, China;
2 Centre for Simulation and Modelling of Particulate Systems, Southeast University-Monash University Joint Research School, Suzhou 215123, China

收稿日期:2015-12-10 修回日期:2016-01-27 出版日期:2016-08-28 发布日期:2016-09-21
通讯作者: Wenqi Zhong
基金资助:
Supported by the National Science Foundation of China for Distinguished Young Scholars (No. 51325601), Major Program of National Science Foundation of China (No. 51390492) and Joint Funds of National Science Foundation of China (No. U1560205).

Simultaneous desulfurization and denitrification of sintering flue gas via composite absorbent

Jie Wang^1,2, Wenqi Zhong^1,2

1 Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, China;
2 Centre for Simulation and Modelling of Particulate Systems, Southeast University-Monash University Joint Research School, Suzhou 215123, China

Received:2015-12-10 Revised:2016-01-27 Online:2016-08-28 Published:2016-09-21
Supported by:
Supported by the National Science Foundation of China for Distinguished Young Scholars (No. 51325601), Major Program of National Science Foundation of China (No. 51390492) and Joint Funds of National Science Foundation of China (No. U1560205).

摘要/Abstract

摘要： Experiments on simultaneous absorption of SO₂ and NO_X from sintering flue gas via a composite absorbent NaClO₂/NaClO were carried out. The effects of various operating parameters such as NaClO₂ concentration (m_s), NaClO concentration (m_p), molar ratio of NaClO₂/NaClO (M), solution temperature (T_R), initial solution pH, gas flow (V_g) and inlet concentration of SO₂ (C_S) and NO (C_N) on the removal efficiencies of SO₂ and NO were discussed. The optimal experimental conditions were determined to be initial solution pH=6, T_R=55℃ and M=1.3 under which the average efficiencies of desulfurization and denitrification could reach 99.7% and 90.8%, respectively. Moreover, according to the analysis of reaction products, it was found that adding NaClO to NaClO₂ aqueous solution is favorable for the generation of ClO₂ and Cl₂ which have significant effect on desulfurization and denitrification. Finally, engineering experiments were performed and obtained good results demonstrating that this method is practicable and promising.

关键词: Simultaneous desulfurization and, denitrification, Sintering flue gas, Composite absorbent

Abstract: Experiments on simultaneous absorption of SO₂ and NO_X from sintering flue gas via a composite absorbent NaClO₂/NaClO were carried out. The effects of various operating parameters such as NaClO₂ concentration (m_s), NaClO concentration (m_p), molar ratio of NaClO₂/NaClO (M), solution temperature (T_R), initial solution pH, gas flow (V_g) and inlet concentration of SO₂ (C_S) and NO (C_N) on the removal efficiencies of SO₂ and NO were discussed. The optimal experimental conditions were determined to be initial solution pH=6, T_R=55℃ and M=1.3 under which the average efficiencies of desulfurization and denitrification could reach 99.7% and 90.8%, respectively. Moreover, according to the analysis of reaction products, it was found that adding NaClO to NaClO₂ aqueous solution is favorable for the generation of ClO₂ and Cl₂ which have significant effect on desulfurization and denitrification. Finally, engineering experiments were performed and obtained good results demonstrating that this method is practicable and promising.

Key words: Simultaneous desulfurization and, denitrification, Sintering flue gas, Composite absorbent

Jie Wang, Wenqi Zhong. Simultaneous desulfurization and denitrification of sintering flue gas via composite absorbent[J]. , 2016, 24(8): 1104-1111.

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Simultaneous desulfurization and denitrification of sintering flue gas via composite absorbent

Simultaneous desulfurization and denitrification of sintering flue gas via composite absorbent

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