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针对氧化锌烟尘净化液中氟含量高的问题,分别以Ce(SO4)2·4H2O和Ce2(CO3)3为除氟剂,以H2O2和Na2S2O3为辅助剂,借助X射线衍射(XRD)法,探讨了铈盐沉淀法从氧化锌净化液中除氟的机制。结果表明:Ce(SO4)2·4H2O难以与净化液中的F-生成沉淀物;在添加Na2S2O3后,Ce2(CO3)3与浸出液中的F-生成CeCO3F沉淀物,可以实现除氟目的,溶液中氟质量浓度可以从0.638g/L降至0.115g/L,但Ce2(CO3)3用量大,成本较高。 相似文献
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The jet co-flow packing tray(JCPT) with three different types of perforation in equal opening fraction was tested in two rectangular columns with 0.12 m in width and 0.27 m in length operated with air-water system.The influences of gas phase orifice F-factor and clear liquid height He on the amount of liquid lifted, Q, were examined. The corresponding correlation between Q with F-factor and equivalent diameter of perforated holes as well as Hc was obtained. Furthermore, the non-steady state mass transfer performance of JCPT was tested by the humidification of air with water. Finally, by the analysis of data and comparison, it was found that the JCPT tray with single cap and two holes exhibited the highest mass transfer efficiency and best performance. 相似文献
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精馏塔γ射线扫描故障诊断技术 总被引:1,自引:0,他引:1
传统精馏塔故障诊断方法停车时间长,造成巨大的经济损失。γ射线扫描技术利用一束γ射线穿过精馏塔,并沿塔高方向移动,检测穿过射线的强度,得到全塔或部分塔段的射线吸收图谱。射线吸收图谱反映了塔内密度变化,即反映了塔内流体状态,从而为精馏塔的故障诊断提供可靠依据。γ射线扫描可以判断塔内件损坏、液泛、漏液、雾沫夹带、气液分布不均等故障及具体位置;也可为确定精馏塔负荷瓶颈位置、提高产能,以及为安排计划停车提供科学依据。γ射线扫描诊断时,无需停车,具有快速、直观、准确等优点。拜耳技术服务研制开发了全自动γ射线扫描系统,控制精确,操作安全,该系统为拜耳上海一体化基地近百座精馏塔的维护和检修发挥重要作用。 相似文献
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