Separator-plates alternative extraction tower and extraction method

An extraction tower and alternating technology, which is applied in the partition alternating extraction tower and the field of extraction, can solve the problems of wide variation range of continuous phase and dispersed phase fluid concentration, large difference in liquid-liquid two-phase flow ratio, etc., to improve the overall transmission Massive driving force, increased flow and average flow rate, simple structure effect

Active Publication Date: 2015-08-05
ZHEJIANG UNIV
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Problems solved by technology

[0006] There are many extraction processes in the industry, the difference between the liquid-liquid two-phase flow ratio is large, the concentration range of the continuous phase and the dispersed phase fluid is also wide, and the interfacial tension of the two phases also has a large change at different positions in the tower. Traditional packing Both the tower and the sieve tray have certain defects

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  • Separator-plates alternative extraction tower and extraction method
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  • Separator-plates alternative extraction tower and extraction method

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Embodiment Construction

[0023] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.

[0024] Such as Figure 1-5 As shown, an alternate partition extraction tower of the present invention includes two arcuate riser pipes 1 placed opposite each other, and a vertical intermediate partition 2 is welded on the central axis of the two arcuate riser pipes 1. 2 Divide the space in the circular extraction tower into two mass transfer zones.

[0025] Semicircular trays 3 are alternately arranged on both sides of the intermediate partition 2 at equal intervals. The tray 3 on one side is just in the middle of the two trays 3 on the other side. The tray 3 is a sieve plate or a perforated plate, on the same side. A mass transfer unit is formed between two adjacent semicircular trays 3; by staggering the trays 3, continuous and same flow flow between adjacent trays 3 on the same side of the partition 2 can be realized, which is adjacent to the tradi...

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Abstract

The invention discloses a separator-plates alternative extraction tower and an extraction method. The round extraction tower is equally divided from the center through a vertical separator plate into two parts, and semicircular tower plates are alternately equally spaced at two sides of the separator plate. A continuous-phase material flows among the semicircular tower plates at one side and flows along a downcomer (or a riser tube) at the edge among two tower plates at the other side of the separator plate after mass exchange with a dispersed-phase material which passes through the tower plates; and the dispersed-phase material passes through the tower plates and flows between tower plates of the next stage at the same side after gathered on (or below) the tower plates. Through the above arrangement of the tower plate structure, the continuous phase flows step by step at two side of the separator plate, but the dispersed phase only flows step by step at the same side of the separator plate. By the arranging method of the tower plates, the continuous-phase material at the same side of the separator plate flows in the same direction on (or below) the two adjacent tower plates, thus raising average mass transfer force of a single tower plate. The extraction tower is especially suitable for a liquid-liquid extraction process of two large phases with the lower-flow one being a continuous phase.

Description

Technical field [0001] The invention relates to an extraction tower and an extraction method, in particular to provide a partition alternating extraction tower and an extraction method for a multi-stage countercurrent extraction process in chemical production. Background technique [0002] In chemical production, the sieve plate tower is commonly used to complete the liquid-liquid continuous countercurrent extraction process. It has advantages over the packed tower in terms of reducing the axial backmixing of the continuous phase and saving costs, especially for systems with large changes in the interfacial tension of the two phases. By changing the tray structure, the extraction process can be carried out more rationally. [0003] Due to the large space in the extraction tower, the flow rate of the continuous phase fluid between the trays is low, so that the residence time distribution is very uneven, resulting in the generally low efficiency of the trays of the extraction tower. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D11/04
Inventor 王成习
Owner ZHEJIANG UNIV
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