Experimental study on sulfite oxidation inhibition by basic aluminum sulfate desorption desulfurization method

WEN Gao; WU Fucai; ZHANG Shufeng; ZHANG Zijing; MA Minghui; WANG Yongxin

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Experimental study on sulfite oxidation inhibition by basic aluminum sulfate desorption desulfurization method

Thermal Power Generation Vol. 44, Issue 7, Pages: 101-106(2015)

更新时间：2025-09-28

- Experimental study on sulfite oxidation inhibition by basic aluminum sulfate desorption desulfurization method
- 作者机构：
  
  内蒙古工业大学能源与动力工程学院
- 作者简介：
- 基金信息：
- DOI：
  CLC： X701.3
- Published：2015
- 稿件说明：
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WEN Gao, WU Fucai, ZHANG Shufeng, et al. Experimental study on sulfite oxidation inhibition by basic aluminum sulfate desorption desulfurization method[J]. Thermal Power Generation, 2015, 44(7): 101-106.
DOI：

WEN Gao, WU Fucai, ZHANG Shufeng, et al. Experimental study on sulfite oxidation inhibition by basic aluminum sulfate desorption desulfurization method[J]. Thermal Power Generation, 2015, 44(7): 101-106. DOI：

摘要

为了研究抑制石灰石-石膏湿法烟气脱硫中SO2-3氧化为SO2-4的不利副反应

配制了铝质量浓度为30g/L、碱度为26%的碱式硫酸铝溶液

分别进行不添加阻氧剂(空白)、添加2种阻氧剂(对苯二酚、乙醇)的SO2吸收及解吸效应试验

并分别采用间接碘量法和EDTA滴定法对溶液中的SO2-3和SO2-4浓度进行测定。试验结果表明:添加对苯二酚或乙醇均对SO2-3氧化为SO2-4具有抑制作用;添加对苯二酚的最佳浓度约为4mmol/L

SO2-3的氧化量较空白试验减少54%以上;添加乙醇的最佳浓度约为7 mmol/L

SO2-3的氧化量较空白试验减少63%以上;添加对苯二酚与乙醇均具有提高SO2解吸率效应

与空白试验相比

添加4mmol/L对苯二酚或7mmol/L乙醇时

SO2解吸率至少提高15%;就抑制氧化效应而言

添加乙醇的效果更好。

Abstract

To inhibit deputy reaction of SO2-3oxidized into SO2-4during the process of limestone-gypsum wet flue-gas desulfurization

the basic aluminum sulfate solution with aluminum content of 30g/L and alkalinity of 26% was prepared to carry out desulfurization tests.Two antioxidants

hydroquinone and ethanol

were added into the basic aluminum sulfate solution to prevent the SO2-3from being oxidized to SO2-4and to improve the SO2 desorption rate.The blank test was also conducted to provide a reference.The concentrations of SO2-3and SO2-4in the solution were measured by indirect iodimetry and EDTA titration method.The results show that

both the hydroquinone and the ethanol have an inhibition effect on SO2-3oxidation to SO2-4.The optimal hydroquinone concentration is about 4mmol/L

the reduced oxidatized SO2-3amount is about 54% higher than that in the blank test.The optimal ethanol concentration is about 7mmol/L

the reduced oxidatized SO2-3amount is about 63 % t higher than that in the blank test.Adding hydroquinone and ethanol can both improve the SO2 desorption rate.Compared with the blank test

adding 4mmol/L hydroquinone or 7mmol/L ethanol

the SO2 desorption rate can be increased by at least 15%.If only considering the effect of inhibition oxidation

adding ethanol is better.

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