应用化学 ›› 2009, Vol. 26 ›› Issue (08): 952-955.

• 研究论文 • 上一篇    下一篇

胺类吸收剂模拟烟气脱硫

翟林智,钟秦*   

  1. (南京理工大学化工学院 南京 210094)
  • 收稿日期:2008-06-30 修回日期:2009-03-24 出版日期:2009-08-10 发布日期:2009-08-10
  • 通讯作者: 钟秦,男,博士,教授; E-mail:ZQ304@mail.njust.edu.cn; 研究方向:大气污染物控制
  • 基金资助:
    江苏省高校科研成果产业化推进项目(HJ07-008)

Desulfurization of Flue Gas Simulated with Amine Solution

ZHAI Lin-Zhi, ZHONG Qin*   

  1. (School of Chemical Engineering,Nanjing University of Science & Technology,Nanjing 210094)
  • Received:2008-06-30 Revised:2009-03-24 Published:2009-08-10 Online:2009-08-10

摘要:

以醇胺和乙二胺为原料,配制0.3 mol/L的水溶液,用于实验室模拟烟气脱硫的研究。通过碘量法测定脱硫率,采用离子色谱测定SO2吸收容量、吸收液中SO2的氧化率和解吸率,同时探讨了循环次数对脱硫率和富液中SO2含量的影响。结果表明,吸收进行30 min时,吸收液的脱硫率均保持在99 %以上,60 min时,乙二胺类溶液的脱硫率仍达99 %,醇胺吸收液脱硫效果明显下降。乙二胺溶液对SO2 的吸收容量为455 mg/L,远远高于醇胺类吸收液。若乙二胺溶液中加入硼酸,则其对SO2的吸收容量略低(450 mg/L),但提高了溶液的抗氧化性,吸收液中SO2的氧化率由1.14 %减至0.29 %,同时解吸率由38.0 %增至59.0 %。10次吸收-解吸循环实验数据显示,乙二胺/硼酸溶液的平均脱硫率均在99 %以上,富胺液中SO2含量由0.44 mol/L减至0.40 mol/L,表明吸收液的脱硫性能良好,可以作为烟气脱硫剂。

关键词: 醇胺,乙二胺,乙二胺/硼酸,烟气脱硫

Abstract:

Experimental research on the desulfurization of flue gas simulated with 0.3 mol/L amine solutions prepared with ethanolamine, ethylenediamine and so on. Desulfurization efficiency was studied by iodometry titration. Absorption capacity of SO2, oxidation of absorbed SO2 and desorption efficiency of SO2 were researched via ion chromatography. Meantime, cycles on the desulfurization efficiency and SO2 content of rich absorbent were studied. The results show that the desulfurization efficiency of all the absorbents were maintained 99 % for 30 min. After 60 min, the desulfurization efficiency of ethylenediamine solutions reached 99 %, but the desulfurization efficiency of alcohol amine solutions decreased significantly. The absorption capacity of the ethylenediamine solution for SO2 was 455 mg/L, much higher than that of the alcohol amine solution. Boric acid was added to the ethylenediamine solution, the absorption capacity of the solution for SO2 was slightly lower(450 mg/L), but oxidation efficiency of absorbed SO2 reduced from 1.14 % to 0.29 %. At the same time, the desorption efficiency of SO2 increased from 38.0 % to 59.0 %. Absorption-desorption cycle experimentals indicated that the average desulfurization efficiency of the ethylenediamine/boric acid solution reached above 99 %, and SO2 content of rich absorbents decreased from 0.44 mol/L to 0.40 mol/L. The results suggest the desulfurization effect of the ethylenediamine/boric acid solution is excellent as the flue gas absorbent.

Key words: alcohol amine, ethylenediamine, ethylenediamine/boric acid, flue gas desulfurization

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