化工进展 ›› 2019, Vol. 38 ›› Issue (06): 2992-3001.DOI: 10.16085/j.issn.1000-6613.2018-1658

• 资源与环境化工 • 上一篇    下一篇

内插扭带对鼓泡反应器脱硫脱硝效果的影响

许源(),陶汉中(),张栋玮   

  1. 南京工业大学能源科学与工程学院,江苏 南京 211800
  • 收稿日期:2018-08-14 出版日期:2019-06-05 发布日期:2019-06-05
  • 通讯作者: 陶汉中
  • 作者简介:许源(1991—),男,硕士研究生,研究方向为烟气脱硫脱硝。E-mail:<email>xyandml0126@163.com</email>。

Desulfurization and denitrification in a bubbling reactor with twist tape

Yuan XU(),Hanzhong TAO(),Dongwei ZHANG   

  1. School of Energy Science and Engineering, Nanjing Tech University, Nanjing 211800, Jiangsu, China
  • Received:2018-08-14 Online:2019-06-05 Published:2019-06-05
  • Contact: Hanzhong TAO

摘要:

在玻璃鼓泡反应器中进行Na2S2O8和H2O2两种混合氧化剂吸收SO2和NO的实验研究,结果表明:在Na2S2O8氧化剂中加入H2O2可以促进脱硫脱硝,考虑溶液的成本以及系统的整体脱硫脱硝总效率,选取质量分数为2%的H2O2和10%的Na2S2O8混合液具有较高的性价比。基于数值模拟的方法,将扭带引入鼓泡反应器中,研究扭带直径、厚度和扭率对鼓泡反应器脱硫脱硝效率的影响。数值模拟结果表明,与普通鼓泡反应器相比,加入扭带促进脱硫脱硝的效果。脱硫脱硝效率随着扭带直径和扭带厚度的增大而增大,随着扭带扭率的增大而减小,当扭带的直径从16mm增加到24mm时,系统的脱硫率和脱硝率分别增加了3.88%和3.45%;当扭带的厚度从0.2mm增加到1mm时,系统的脱硫率和脱硝率分别增加了4.27%和1.62%;当扭带的扭率从0.25增加到0.75时,系统的脱硫率和脱硝率分别降低了3.91%和1.90%。

关键词: 鼓泡反应器, 实验验证, 数值模拟, 脱硫, 脱硝, 扭带

Abstract:

Based on bubble column reactor, experimental study on the absorption of nitric oxide (NO) and sulfur dioxide (SO2) by two mixed liquid oxidants [hydrogen peroxide (H2O2) and sodium persulfate (Na2S2O8)] was performed. The experimental results showed that the addition of H2O2 can improve the desulfurization and denitrification performance of Na2S2O8 solution. Considering the cost of the solution and the total efficiency, Mixed solution of 2% H2O2 and 10% Na2S2O8 was selected as the working medium for the subsequent experiment and simulation. Based on numerical simulation method, the twist tape was introduced to the bubble column reactor. The effect of diameter, thickness and twist rate of twist tape on desulfurization and denitrification efficiency in the bubble column reactor was investigated. The numerical results showed that compared with general bubble column reactor, the twist tape could promote desulfurization and denitrification. The efficiency of desulfurization and denitrification increases with the increase of the twist tape diameter and the twist tape thickness, decreases with the increase of the twist rate of twist tape. When the twist diameter increased from 16mm to 24mm, the desulfurization and denitrification efficiency were increased by 3.88% and 3.45% respectively. When the twist tape thickness increased from 0.2mm to 1mm, the desulfurization and denitrification efficiencywere increased by 4.27% and 1.62% respectively. When the twist tape torsion increased from 0.25 to 0.75, the desulfurization and denitrification efficiency were decreased by 3.91% and 1.90% respectively.

Key words: bubble column reactor, experimental validation, numerical simulation, desulfurization, denitrification, twist tape

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