工业硅冶炼烟气双液相脱硫机理分析  

Mechanism analysis on double liquid phase desulfurization for industrial silicon smelting flue gas

作　　者：肖庆超 宋辛[1] 贾丽娟 李凯[1] 瞿广飞[1] 孙丽娜[1] 宁平[1] XIAO Qing-chao;SONG Xin;JIA Li-juan;LI Kai;QU Guang-fei;SUN Li-na;NING Ping(Faculty of Environmental Science and Engineering,Kunming University of Science and Technology,Kunming 650093,China;Kunming Youdu Environmental Monitoring Limited Company,Kunming 650100,China;School of Chemistry and Environment,Yunnan Minzu University,Kunming 650504,China)

机构地区：[1]昆明理工大学环境科学与工程学院,昆明650093 [2]昆明有度环境监测有限公司,昆明650100 [3]云南民族大学化学与环境学院,昆明650504

出　　处：《矿冶》2021年第1期80-83,共4页Mining And Metallurgy

基　　金：国家重点研发计划项目(2018YFC0213400)。

摘　　要：采用密度泛函理论分析了工业硅冶炼烟气双液相脱硫的反应机理。结果表明,O2和SO2主要分布在水相,H2SO3主要分布在有机相;SO2被水相吸收后转变为H2SO3;H2SO3和O2通过有机相和水相间的液膜进入有机相膜,在有机相表面发生催化氧化反应,H2SO3被氧化成H2SO4,由于H2SO4在水中的溶解度大于在有机相中的,生成的H2SO4从有机相转入水相,该过程降低了水中H2SO3的浓度,使水吸收SO2的过程通过有机相催化氧化得以持续进行。双液相体系能够起到含硫组分的分离和催化增强作用。In this paper,the reaction mechanism on double liquid phase desulfurization for industrial silicon smelting flue gas was analyzed by density functional theory.The results showed that O2 and SO2 were mainly distributed in the water phase.H2SO3 was mainly distributed in the organic phase.SO2 was firstly absorbed into H2SO3 by water phase.Then,H2SO3 and O2 entered the organic phase membrane through the liquid membrane of two liquid phases between organic phase and water phase.On the surface of organic phase,H2SO3 reacted with O2,and H2SO3 was oxidized to H2SO4.As the solubility of H2SO4 in water was greater than that in organic phase,H2SO4 was transferred from organic phase to water phase.This process reduced the concentration of H2SO3 in water,and made the absorption of SO2 by water continue through organic phase catalytic oxidation.The double liquid phase system can play a role in the separation and catalytic enhancement of sulfur-containing components.

关 键 词：冶炼烟气 SO2 有机相吸收 有机相催化氧化 

分 类 号：X511[环境科学与工程—环境工程]