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    • 4. 发明申请
    • THREE PHASE EXTRACTIVE DISTILLATION WITH MULTIPLE COLUMNS CONNECTED IN SERIES
    • 系列中连接多个柱的三相萃取蒸馏
    • WO2008021917A2
    • 2008-02-21
    • PCT/US2007/075530
    • 2007-08-08
    • AMT INTERNATIONAL, INC.WU, Kuang-YeuLEE, Adam, T.LIN, Tzong-BinSHEN, Hung-Chung
    • WU, Kuang-YeuLEE, Adam, T.LIN, Tzong-BinSHEN, Hung-Chung
    • B01D3/14
    • B01D3/143
    • A novel method for connecting multiple existing columns which are retrofitted into vapor-liquid contacting devices with trays or packings suitable for the operation of a three-phase (vapor-liquid-liquid) extractive distillation column for aromatics recovery. The retrofitted columns are connected by a vapor transfer line to transfer the vapor phase from the top of the lower column to the bottom of the upper column, and by a liquid transfer line to transfer the liquid phase from the bottom of the upper column to the top of the lower column of the three-phase extractive distillation column. One improvement is the feeding of the ascending vapor from the top of the lower column to below the liquid level in the bottom of the upper column as the aeration/mixing driving force and/or in combination of the installation of a jet mixer to prevent phase separation, which is deemed to occur at the bottom of the upper column, wherein a bulk quantity of liquid is maintained without mixing in order to provide the hydraulic head for the bottom liquid transfer pump. The jet mixer, if installed, uses the bottom liquid from the upper column or the extractive solvent feed as the jetting liquid to provide the necessary mixing to homogenize and disperse the two liquid phases in the bottom of the upper column. Experimental data is disclosed for verifying the existence of two liquid phases in the three-phase extractive distillation column.
    • 一种用于连接多个现有柱的新方法,其被改装成气 - 液接触装置,其中适用于操作用于芳烃回收的三相(气 - 液 - 液)萃取蒸馏塔的塔板或填料。 改进的柱通过蒸气传输管线连接,以将气相从下部塔顶部传递到上部塔底部,并通过液体输送管线将液相从上部塔底部转移到 三相萃取蒸馏塔下塔顶部。 一个改进是将上升的蒸汽从上部塔顶部输送到上部塔底部的液位以作为通气/混合驱动力和/或组合喷射混合器的装置以防止相位 分离,其被认为发生在上柱的底部,其中保持大量的液体而不混合,以便为底部液体输送泵提供液压头。 喷射混合器如果安装,则使用来自上塔的底部液体或萃取溶剂进料作为喷射液体,以提供必要的混合,以使两相液相在上塔底部均匀化并分散。 公开了用于验证三相萃取蒸馏塔中两个液相的存在的实验数据。