CZ357099A3 - Multiphase extraction apparatus with washing chamber - Google Patents

Abstract

Multiphase extractor extraction (1) and reextraction chambers (2) which are connected at their upper and lower portions by connecting means channels (5) are provided with distribution devices (4), as well as the necks (8, 10, 11, 12) for supply and discharge extraction phase and absorption phase. Performing linked extraction, washing and reextraction processes the same apparatus is an extraction chamber (1) and a reextraction the chamber (2) interconnected by a washing chamber (3), between them. Extraction (1), reextraction (2) and the washing chamber (3) may be additionally equipped 3 separation zones (6) which are arranged in the region of the inlet openings of the connecting channels (5)

Description

The invention relates to a multiphase extractor with an extraction and reextraction chamber, which are connected at their upper and lower part by connecting channels and are equipped with distributing devices and orifices for supplying and withdrawing the transfer phase and the withdrawal phase.

BACKGROUND OF THE INVENTION

Such a multiphase extractor can be used in the chemical, hydrometallurgical, microbiological and other industries to separate, extract, concentrate and purify substances.

From the technical point of view as well as the achievable effect, the known apparatus is closest to the three-phase extractor described in Russian Patent Application No. 94-015776 / 26, which consists of an extraction chamber filled with a continuous phase (liquid membrane) and a reextraction chamber. The chambers have a phase dispersing device and overflows for continuous phase circulation are connected to each other. The overflows are in the form of connecting channels or connecting tubes which connect the upper and lower parts of the chambers to each other. The extractor is provided with a throat for supplying and discharging the first and second

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0 dispersed phase. The first phase to be dispersed, which is the starting solution, respectively. and a second phase to be dispersed, respectively. in the respective chamber, by means of a dispersing or distributing device, they are divided into drops which, like a swarm of drops, move in a continuous phase. Due to the dispersion density differences in the first and second chambers, the continuous phase is circulated through the upper and lower weirs so that the extracted substance is transferred from one chamber to the other and from the transfer phase to the collection phase. Thus, in the first chamber, the continuous phase extraction takes place as the extraction agent, and in the second chamber the separated substance is reextracted with the withdrawal phase as the reextraction agent.

SUMMARY OF THE INVENTION

The object of the invention is to reveal, by modification of the multiphase extractor, other applications in which the extraction and reextraction processes can be carried out in a single apparatus in conjunction with the washing processes. In particular, washing of the extractant should also be possible.

This object is solved by the above-described multiphase extractor according to the invention in that the extraction and reextraction chambers are connected via a washing chamber interposed therebetween.

According to a preferred embodiment of the invention,

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The re-extraction and washing chamber is equipped with separation zones.

According to a preferred embodiment, the upper part of the extraction chamber is directly connected to the upper part of the re-extraction chamber.

Alternatively, the upper part of the extraction chamber may also be directly connected to the lower part of the re-extraction chamber.

Another alternative is that the lower part of the extraction chamber is directly connected to the lower part of the re-extraction chamber.

A further embodiment of the invention is characterized in that the extraction chamber and the re-extraction chamber together with the washing chamber form an equilibrium stage and that a number of such stages are cascaded sequentially.

The connection of the washing chambers between the extraction and reextraction chambers allows the combined extraction, washing and reextraction processes to be carried out in one and the same apparatus.

The various connections between the extraction and reextraction chambers create the prerequisites for the implementation of various technological variants of the separation processes (direct or opposite direction of the extraction medium with the transfer, wash and take-off phases).

Cascading shifting of multiple equilibrium stages consecutively, consisting of extraction, washing and reextraction

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The chamber allows for multistage separation processes in a multiphase extractor.

BRIEF DESCRIPTION OF THE DRAWINGS

DETAILED DESCRIPTION OF THE DRAWINGS The invention will be explained in more detail with reference to the drawings, in which: FIGS. 1 to 6 show various embodiments of single-stage extractors; and FIG.

DETAILED DESCRIPTION OF THE INVENTION

According to Figs. 1-6, the multiphase extractor consists essentially of an extraction chamber 1, a re-extraction chamber 2 and a washing chamber 2, which is arranged between the two chambers 1 and 2. According to Figs. 6 at the bottom of the extraction chamber 1 and the reextraction chamber 2 are directly connected to each other by a connecting tube 2 extending outwardly around the washing chamber 2. Separation zones 6 are provided at the inlet openings of the connecting tube 2 in the form of Separation chambers prevent droplets from being carried by the circulating stream of continuous phase from one chamber to another.

The transfer phase is supplied to the chamber 1 with the neck 2, to the chamber 2

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99 99999 99 99 through the removal phase 10 and the chamber 3 through the washing liquid (washing phase). To disperse the phases, a distributor device 4 is provided at the end of the necks. The washing chamber 3 also has a separation zone 6. In this case, the lower part of the extraction chamber 1 can be connected to the upper (Fig. 1) or lower (Fig. 2) part of the washing chamber 3. In the extractor according to Fig. 1, the extraction means is fed in countercurrent with the take-off phase. washing phase. In contrast, in the extractor of FIG. 2, the extractant is conducted in countercurrent with the wash phase and in direct current with the take-off and transfer phases.

Figures 3 and 4 show variants of an embodiment of a multiphase extractor in which the upper part of the first chamber 1 (extraction chamber) is directly connected to the lower part of the second chamber 2 (reextraction chamber), wherein the connection tube 3 is guided again behind the washing chamber 3 as in the above embodiments, the solution (transfer phase) is transferred to the extraction chamber 3 via the orifice 3. The substance to be extracted is extracted with a continuous phase (extraction agent). The extraction phase (i.e. the extracted material enriched continuous phase) passes through the connecting tube 3 to the washing chamber 3, where it is washed with the washing agent supplied through the throat 3. . Upon transition from one chamber to the other, the continuous phase flows through the separation zones 3 and 7 in the chambers 1, 2 and 3, thereby separating, possibly by flowing the entrained droplet, a transfer, wash or take-off phase. Handover, washing and

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9999 999 · 9 • 9 99 999 · · 99 9 «take-off phases with throats XI, 12 and 12 are removed from chambers 1, 2 and

2.

In the multi-stage extractor of FIG. 7, the extraction, washing and reextraction processes are repeated at each stage. Depending on how the chambers 1, 2 and 2 are connected to each other, different variants of the substance separation process with respect to the flow conduction (direct current or countercurrent) can be realized.

Claims (6)

A multiphase extractor having an extraction (1) and a re-extraction chamber (2), which are connected at their upper and lower part by connecting channels (5) and are equipped with distributing devices (4) and necks (8, 10, 11), 12) for supplying and withdrawing the transfer and removal phases, characterized in that the extraction (1) and re-extraction chamber (2) are a washing chamber (3) interconnected therebetween. A multiphase extractor according to claim 1, characterized in that the extraction (1), reextraction (2) and washing chamber (3) are provided with separation zones (6) which are provided in the region of the inlet openings of the connecting ducts (5). Apparatus according to claim 1-2, characterized in that the upper part of the extraction chamber (1) is directly connected to the upper part of the re-extraction chamber (2). Apparatus according to claim 1-2, characterized in that the upper part of the extraction chamber (1) is directly connected to the lower part of the re-extraction chamber (2). Apparatus according to claim 1-2, characterized in that the lower part of the extraction chamber (1) is directly connected to the lower part of the re-extraction chamber (2). 16 78448 (78448a.doc) • 4 4 4 4 444 * 44 * 4 4 4 4 4 4 4 44 444 444 4 4 4 4 4 444 44 44 44 6. by bringing them together in a row Apparatus according to claim 1-5, characterized in that the extraction chamber (1) and the re-extraction chamber (2) form an equilibrium step with the washing chamber (3) and that a number of such equilibrium stages are included.