SO2 removal from simulated smelting gas with (NH4)2S and sulfur recycling

WANG Langlang; WANG Xueqian; NING Ping; SHI Yong; MA Yixing; JIA Rui; WANG Fei

doi:10.3969/j.issn.0438-1157.2014.11.053

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SO₂ removal from simulated smelting gas with (NH₄)₂S and sulfur recycling

更新时间：2025-12-10

- SO₂ removal from simulated smelting gas with (NH₄)₂S and sulfur recycling
- CIESC Journal Issue 11, Pages: 4586-4592(2014)
- 作者机构：
  
  昆明理工大学环境科学与工程学院,云南,昆明,650500
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0438-1157.2014.11.053
  CLC： 701
- Online First：05 November 2014，
  
  Published：05 November 2014
- 稿件说明：
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WANG Langlang, WANG Xueqian, NING Ping, et al. SO₂ removal from simulated smelting gas with (NH₄)₂S and sulfur recycling[J]. CIESC Journal, 2014, (11): 4586-4592. DOI: 10.3969/j.issn.0438-1157.2014.11.053.
DOI：

WANG Langlang, WANG Xueqian, NING Ping, et al. SO₂ removal from simulated smelting gas with (NH₄)₂S and sulfur recycling[J]. CIESC Journal, 2014, (11): 4586-4592. DOI: 10.3969/j.issn.0438-1157.2014.11.053. DOI：

摘要

采用(NH4)2S溶液吸收净化高浓度SO2烟气

得到(NH4)2S2O3和NH4HSO3的混合溶液并转移至高压反应釜中

控制反应条件

两种物质发生自氧化还原反应

生成硫磺和(NH4)2SO4.实验考察了吸收SO2过程和自氧化还原过程的影响条件

结果表明:在pH=3～7

SO2气体流速300 ml·min-1

(NH4)2S浓度为0.2～1.2 mol·L-1

常温条件下

烟气中二氧化硫的吸收率达到99.8%以上

且无H2S生成;在pH=2.5～3.0

温度为130℃条件下

反应进行1 h

硫磺收率达到95%以上

溶液经过蒸发结晶得到(NH4)2SO4.用X射线衍射(XRD)和X射线荧光光谱(XRF)对硫磺和硫酸铵进行表征分析

结果表明:硫磺的纯度为99.14%

硫酸铵中氮元素含量为23.6%.

Abstract

SO2 in simulated smelting gas was absorbed by (NH4)2S solution

to obtain a mixed solution of (NH4)2S2O3 and NH4HSO3. After that the mixed solution was transferred into a special high pressure reaction kettle

and sulfur and ammonium sulfate were generated through the REDOX reaction under controlled conditions. The influence of SO2 absorption process condition and REDOX process condition were investigated. Under the condition of pH=3—7

SO2 flow velocity of 300 ml·min-1

normal temperature

(NH4)2S solution concentration of 0.2—1.2 mol·L-1

absorption efficiency of SO2 reached more than 99.8% and H2S was not produced. Under the condition of pH=2.5—3.0

reaction temperature 130℃

sulfur recovery rate could reach more than 95% after one hour of reaction. Ammonium sulfate could be obtained through evaporation crystallization. Sulfur and ammonium sulfate generated during reaction were characterized by X-ray diffraction (XRD) and X-ray fluorescence (XRF). Purity of sulfur was 99.14% and percentage of nitrogen in ammonium sulfate was 23.6%.

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