倪凯文,荆国华,吴孝敏,陈子逸

• 1:华侨大学化工学院

摘要(Abstract)：

为了解决染料行业生产过程中磺化和硝化产生的高浓度硫氧化物(主要为SO_2)和氮氧化物(主要为NO_2)废气所造成的大气污染,采用填料塔反应器同时吸收SO_2和NO_2,并生成亚硝酰硫酸的工艺,并对优化的工艺条件进行深入的分析。主要考察了吸收液的构成(浓硫酸和浓硝酸)与浓度、气体流速、污染物浓度和吸收时间等参数对吸收效率和体积传质系数K_G的影响。实验结果表明,SO_2与NO_2的K_G随着吸收液中硝酸体积分数的变化呈抛物线、随气液流速的增大而降低、随污染物浓度变化而变化、随填料物的接触面积的变小而变大。在实验中,采用填料塔同时吸收SO_2 (质量浓度为11 779 mg·m~(-3))和NO_2(质量浓度为2 822 mg·m~(-3))的最佳工艺条件:气体流速为1.32 m·s~(-1),液体流速为0.55 m·s~(-1),硝酸体积分数为20%的浓硫酸和浓硝酸混合吸收液。

关键词(KeyWords)： NO_2;SO_2;亚硝酰硫酸;填料塔;传质系数

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划“重点专项(2018YFC0214103,2019YFC0214302);; 国家自然科学基金(22006043,21806045,21476207,91534113);; 福建省科技计划基金(2020H6013)

作者(Author): 倪凯文,荆国华,吴孝敏,陈子逸

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