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硫酸法钛白废酸浓缩换热器堵塞成因分析

王海波 王奎 孙科 马维平

王海波, 王奎, 孙科, 马维平. 硫酸法钛白废酸浓缩换热器堵塞成因分析[J]. 钢铁钒钛, 2021, 42(5): 115-119, 125. doi: 10.7513/j.issn.1004-7638.2021.05.018
引用本文: 王海波, 王奎, 孙科, 马维平. 硫酸法钛白废酸浓缩换热器堵塞成因分析[J]. 钢铁钒钛, 2021, 42(5): 115-119, 125. doi: 10.7513/j.issn.1004-7638.2021.05.018
Wang Haibo, Wang Kui, Sun Ke, Ma Weiping. Analysis of causes of blockage of waste acid concentration heat exchanger in sulfuric acid process titanium dioxide[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(5): 115-119, 125. doi: 10.7513/j.issn.1004-7638.2021.05.018
Citation: Wang Haibo, Wang Kui, Sun Ke, Ma Weiping. Analysis of causes of blockage of waste acid concentration heat exchanger in sulfuric acid process titanium dioxide[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(5): 115-119, 125. doi: 10.7513/j.issn.1004-7638.2021.05.018

硫酸法钛白废酸浓缩换热器堵塞成因分析

doi: 10.7513/j.issn.1004-7638.2021.05.018
基金项目: 国家自然科学基金青年科学基金项目(51904337)
详细信息
    作者简介:

    王海波(1985—),湖南邵阳人,硕士研究生,化学工程高级工程师,主要从事钛资源及硫酸法钛白副废综合利用方面的研究,E-mail:15273187604@163.com。

  • 中图分类号: TF823,TQ630.9

Analysis of causes of blockage of waste acid concentration heat exchanger in sulfuric acid process titanium dioxide

  • 摘要: 通过化学组成分析和XRD分析,明确了硫酸法钛白废酸换热器堵塞物为以硫酸钙、一水硫酸亚铁及偏钛酸为主的混合物,三者分别来源于20废酸中硫酸钙、硫酸亚铁及硫酸氧钛。在实验室研究了废酸温度及浓度对硫酸钙、硫酸亚铁及硫酸氧钛浓度的影响,研究结果表明:在废酸温度为107 ℃,废酸浓度由18.41%提升至49.93%时,硫酸钙、硫酸亚铁及硫酸氧钛的浓度分别由1.26、126.29、10.76 g/L降低至0.19、13.23、0.16 g/L。现场浓缩废酸各级的硫酸钙、硫酸亚铁及硫酸氧钛浓度变化规律及数据与实验室研究规律及数据基本一致。研究结果为后续解决换热器堵塞提供了重要的数据及理论支撑。
  • 图  1  换热器堵塞物XRD谱

    Figure  1.  XRD pattern of heat exchanger blockage

    图  2  换热器堵塞物SEM形貌

    Figure  2.  SEM images of heat exchanger blockage

    图  3  温度对换热器堵塞物主要化学成分浓度的影响

    Figure  3.  The influence of temperature on the concentration of main chemical components in the blockage of heat exchanger

    图  4  浓缩浓度对换热器堵塞物主要化学成分浓度的影响

    Figure  4.  The influence of H2SO4 concentration on the concentration of main chemical components in the blockage of heat exchanger

    表  1  20废酸主要化学成分

    Table  1.   Main chemical components of 20 waste acid g/L

    H2SO4CaSO4FeSO4TiOSO4MgSO4MnSO4Al2(SO4)3H2SiO3
    245.001.26126.2910.766.360.649.991.64
    下载: 导出CSV

    表  2  换热器堵塞物主要化学成分

    Table  2.   Main chemical components of heat exchanger blockage %

    CaSO4FeSO4MnSO4SiO2H2TiO3Al2(SO4)3MgSO4
    37.5733.071.141.3624.150.392.24
    下载: 导出CSV

    表  3  现场废酸浓缩过程废酸成分变化

    Table  3.   Compositions change of waste acid during field concentration

    样品编号温度/℃H2SO4/%废酸成分/(g·L−1)
    CaSO4FeSO4TiOSO4
    20废酸 0-1 ~40 23.18 1.23 124.86 10.40
    0-2 19.68 1.28 120.19 10.78
    均值 21.43 1.26 122.52 10.59
    一级浓缩酸 1-1 107 36.78 0.37 67.86 2.20
    1-2 37.00 0.31 62.43 1.94
    均值 36.89 0.34 65.14 2.07
    二级浓缩酸 2-1 85 55.44 0.20 8.14 0.64
    2-2 75 44.41 0.17 18.32 0.34
    均值 80 49.93 0.19 13.24 0.50
    下载: 导出CSV
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出版历程
  • 收稿日期:  2021-07-26
  • 刊出日期:  2021-10-30

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