Countercurrent extraction system comprising circulating device

Abstract

The utility model discloses a counter-current extraction system comprising a circulating device, which is characterized in that a communicating pipe is connected between a water phase overflow area of a previous-stage extraction box and an overflow box of a next-stage extraction box, and a valve is arranged on the communicating pipe to form the circulating device, so that a previous-stage water phase of a counter-current water phase can return to the next stage again for extraction reaction; the circulating device can prolong the solution extraction reaction time and deepen the extraction depth in the effective extraction box volume, so that the extraction efficiency is improved, the extraction capacity is improved, an unqualified solution is prevented from flowing into the previous stages in an abnormal state, a large amount of water pumping phase rework is prevented, and the rework of an unqualified water phase in the extraction box is realized through a control valve of the circulating device; compared with a traditional extraction system, the extraction system has the advantages that the yield can be increased, and meanwhile, the abnormal condition disposal period and cost are reduced. The circulating device is easy and convenient to manufacture, easy to obtain, small in occupied area and easy and convenient to operate, the overall appearance of the extraction device is not affected after installation, and the use function of an original extraction box is not affected.

Description

Technical Field

[0001] The utility model belongs to the field of barrel longitudinal seam assembly clamps, in particular to a countercurrent extraction system comprising a circulation device. Background Art

[0002] In the heavy metal wet extraction process, in a fixed-size multi-stage extraction box, different metal extraction rates are extracted using extractants at different pH values. Impurity metals are removed and the required amount of metal is extracted through countercurrent extraction and different pH environments. During extraction, the aqueous countercurrent and forward organic phases are first fully mixed in the mixing chamber, and then enter the clarification chamber for clarification and separation. The organic phase enters the mixing chamber of the next extraction box through the organic phase box and the organic phase flow guide tube, and the aqueous phase enters the mixing chamber of the previous extraction box through the aqueous phase box and the aqueous phase flow guide tube. The two phases form a countercurrent mode in the cascade extraction system. The mixing method adopts a pump type. When the size of the extraction box used for the heavy metal wet extraction is fixed, in order to increase the yield of the heavy metal wet extraction, in most cases, it is necessary to redesign and add extraction boxes, which requires additional site costs and construction costs, and it is impossible to achieve a faster yield increase in the short term. In addition, the heavy metal wet extraction is a continuous operation. In accordance with environmental protection requirements, the extraction box production environment is closed. If the pH value of each level of extraction does not meet the quality requirements during the production process, the internal unqualified solution must be opened to the existing extraction system and stored in the storage equipment at the production site for rework. The open-circuit solution occupies the effective storage space of the production system, and the extraction capacity recovery period is long. Utility Model Content

[0003] The technical problem to be solved by the utility model is: in view of the defects of the existing countercurrent extraction equipment in that after the effective production volume is determined, when the output is increased and the process control is unqualified, the processing cost is high and the cycle is long. The utility model provides a countercurrent extraction system including a circulation device, which can increase the output while reducing the abnormal situation processing cycle and cost.

[0004] The technical solution adopted by the utility model is as follows:

[0005] A countercurrent extraction system including a circulation device comprises an extraction box, wherein a mixing chamber, a clarifying chamber, a water phase box and an organic phase box are arranged in the extraction box, the extraction box comprises a plurality of extraction boxes, and the plurality of extraction boxes are connected in series to form a multi-stage extraction system, and also comprises a circulation device, wherein the water phase box is divided into a water phase overflow area and an overflow box by a partition, a through hole connecting the water phase overflow area and the overflow box is arranged on the partition, a water phase channel is arranged at the bottom of the water phase overflow area, and the circulation device is a connecting pipe connecting the water phase overflow area of ​​the previous extraction box and the overflow box of the next extraction box, and a valve is arranged on the connecting pipe.

[0006] The connecting pipe comprises a liquid outlet pipe arranged on the previous stage extraction box and a liquid inlet pipe arranged on the next stage extraction box, and the liquid outlet pipe and the liquid inlet pipe are connected via a pipeline.

[0007] In summary, due to the adoption of the above technical scheme, the beneficial effects of the utility model are as follows: by connecting a connecting pipe between the water phase overflow area of ​​the previous extraction box and the overflow box of the next extraction box, a valve is provided on the connecting pipe to form a circulation device, so that the countercurrent water phase of the previous stage can be returned to the next stage for extraction reaction. The circulation device can increase the solution extraction reaction time and deepen the extraction depth within the effective extraction box volume, thereby increasing the extraction efficiency and improving the extraction capacity. In the event of an abnormality, unqualified solutions are prevented from flowing into the previous stages, and a large amount of pumping phase rework is prevented. The rework of unqualified water phases in the extraction box is achieved through the control valve of the circulation device. Compared with the traditional extraction system, the utility model can improve the output while reducing the abnormal situation handling cycle and cost. In addition, the circulation device is easy to manufacture and obtain, occupies a small area, and is easy to operate. At the same time, after installation, it does not affect the overall appearance of the extraction device and the use function of the original extraction box. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0009] Figure 2 It is a structural schematic diagram of the connecting pipe of the utility model;

[0010] Figure 3 It is a schematic diagram of the position of the partition described in the utility model. DETAILED DESCRIPTION

[0011] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0012] like Figure 1-Figure 3 A countercurrent extraction system including a circulation device includes an extraction box 1, wherein the extraction box 1 is provided with a mixing chamber 2, a clarifying chamber 3, a water phase box 4 and an organic phase box 5, wherein the extraction box 1 includes a plurality of extraction boxes 1, wherein the plurality of extraction boxes 1 are connected in series to form a multi-stage extraction system, and further includes a circulation device, wherein the water phase box 4 is divided into a water phase overflow area 7 and an overflow box 8 by a partition 6, wherein the partition 6 is provided with a through hole 9 connecting the water phase overflow area 7 and the overflow box 8, wherein the bottom of the water phase overflow area 7 is provided with a water phase channel 10, and the circulation device is a connecting pipe 11 connected between the water phase overflow area 7 of the previous extraction box 1 and the overflow box 8 of the next extraction box 1, wherein the connecting pipe 11 is provided with a valve 12.

[0013] The connecting pipe 11 includes a liquid outlet pipe 13 provided on the previous extraction box 1 and a liquid inlet pipe 14 provided on the next extraction box 1 . The liquid outlet pipe 13 and the liquid inlet pipe 14 are connected via a pipeline 15 .

[0014] When in use, the connecting pipe 11 is made of PVC pipe, which has the characteristics of being usable in an acidic environment and has strong environmental adaptability. A hole is opened at the high point of the overflow area 7 of the previous water phase, and a hole is opened at the next water phase box 4. The liquid outlet pipe 13, the liquid inlet pipe 14 and the pipeline 15 are installed to form the connecting pipe 11. The circulation flow can be controlled by controlling the switch of the valve 12. It has strong controllability and can realize the return of the previous water phase of the countercurrent water phase to the next stage for extraction reaction. It can increase the solution extraction reaction time and deepen the extraction depth within the effective extraction box 1 volume, thereby increasing the extraction efficiency and improving the extraction capacity. In abnormal situations, unqualified solutions are prevented from flowing into the previous stages to avoid a large amount of rework of the pumped water phase, and unqualified water phases in the extraction box 1 can be reworked even if they are not qualified. Compared with the traditional extraction system, the utility model can improve the production while reducing the abnormal situation disposal cycle and cost. When in use, the circulation volume of the metal-containing water phase can be increased according to the predetermined extraction box 1 volume, thereby improving the metal extraction time and efficiency. The solution enters the next-stage water phase box 4 through the circulation pipe, and re-enters the mixing chamber 2 through the suction force in the next-stage water phase box 4 to continue the extraction reaction, thereby realizing the return of unqualified solution or increasing the deep extraction rate of the metal content in this part of the solution, thereby improving the yield.

[0015] The above are only preferred embodiments of the present invention.

Claims

1. A countercurrent extraction system including a circulation device, comprising an extraction box (1), wherein the extraction box (1) is provided with a mixing chamber (2), a clarifying chamber (3), an aqueous phase box (4) and an organic phase box (5), wherein the extraction box (1) comprises a plurality of extraction boxes (1), wherein the plurality of extraction boxes (1) are connected in series to form a multi-stage extraction system, wherein: The invention also comprises a circulation device, wherein the water phase box (4) is divided into a water phase overflow area (7) and an overflow box (8) by a partition (6), a through hole (9) connecting the water phase overflow area (7) and the overflow box (8) is provided on the partition (6), a water phase channel (10) is provided at the bottom of the water phase overflow area (7), and the circulation device is a connecting pipe (11) connecting the water phase overflow area (7) of the previous extraction box (1) and the overflow box (8) of the next extraction box (1), and a valve (12) is provided on the connecting pipe (11).

2. A countercurrent extraction system comprising a circulation device according to claim 1, characterized in that: The connecting pipe (11) comprises a liquid outlet pipe (13) arranged on the previous extraction box (1) and a liquid inlet pipe (14) on the next extraction box (1), and the liquid outlet pipe (13) and the liquid inlet pipe (14) are connected via a pipeline (15).

Images