CN112494988B - Horizontal liquid-liquid extraction device and application method thereof - Google Patents
Horizontal liquid-liquid extraction device and application method thereof Download PDFInfo
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- CN112494988B CN112494988B CN202011448385.XA CN202011448385A CN112494988B CN 112494988 B CN112494988 B CN 112494988B CN 202011448385 A CN202011448385 A CN 202011448385A CN 112494988 B CN112494988 B CN 112494988B
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- 238000000622 liquid--liquid extraction Methods 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000000638 solvent extraction Methods 0.000 title claims abstract description 26
- 238000000605 extraction Methods 0.000 claims abstract description 220
- 238000003756 stirring Methods 0.000 claims abstract description 42
- 238000005192 partition Methods 0.000 claims abstract description 31
- 230000000149 penetrating effect Effects 0.000 claims abstract description 7
- 239000007788 liquid Substances 0.000 claims description 53
- 238000007789 sealing Methods 0.000 claims description 28
- 238000007599 discharging Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 abstract 1
- 239000012071 phase Substances 0.000 description 126
- WPYMKLBDIGXBTP-UHFFFAOYSA-N benzoic acid Chemical compound OC(=O)C1=CC=CC=C1 WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 description 8
- TVMXDCGIABBOFY-UHFFFAOYSA-N octane Chemical compound CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 description 8
- 239000005711 Benzoic acid Substances 0.000 description 4
- 235000010233 benzoic acid Nutrition 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000008367 deionised water Substances 0.000 description 2
- 229910021641 deionized water Inorganic materials 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005191 phase separation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D11/00—Solvent extraction
- B01D11/04—Solvent extraction of solutions which are liquid
- B01D11/0446—Juxtaposition of mixers-settlers
- B01D11/0457—Juxtaposition of mixers-settlers comprising rotating mechanisms, e.g. mixers, mixing pumps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D11/00—Solvent extraction
- B01D11/04—Solvent extraction of solutions which are liquid
- B01D11/0484—Controlling means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D11/00—Solvent extraction
- B01D11/04—Solvent extraction of solutions which are liquid
- B01D11/0488—Flow sheets
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Extraction Or Liquid Replacement (AREA)
Abstract
The application discloses a horizontal liquid-liquid extraction device and a use method thereof, wherein the device comprises a horizontal extraction box, a plurality of porous partition boards are arranged in the extraction box, the porous partition boards divide the extraction box into a plurality of stages of extraction chambers, the center of each porous partition board is provided with a shaft hole, and a plurality of liquid-permeable holes are arranged on the periphery of the outer side of the shaft hole; a stirring shaft is horizontally arranged in the extraction box in a penetrating way, and one end of the stirring shaft penetrates out of the extraction box and is connected with a motor through a coupler; at least one layer of stirring blade is fixedly arranged on the stirring shaft in each stage of extraction chamber; the upper part and the lower part of one end of the extraction box are respectively provided with a light phase inlet pipe and a heavy phase outlet pipe, the upper part and the lower part of the other end of the extraction box are respectively provided with a light phase outlet pipe and a heavy phase inlet pipe, and the corresponding pipelines are respectively provided with a control valve. The extraction device of the application has the advantages of simple structure, low energy consumption, flexible operation, capability of carrying out multistage extraction on the light phase solution and the heavy phase in the extraction device of the application, full mixing of each stage of extraction and good extraction effect.
Description
Technical Field
The application relates to a horizontal liquid-liquid extraction device and a use method thereof.
Background
Liquid-liquid extraction is a traditional and effective method for separating and extracting organic matters from a solution, and the purpose of separation is achieved by utilizing different distribution of solutes between two mutually-soluble liquid phases. The extraction process is that the raw material liquid and the extractant are kept in close contact in a mixer, and the solute passes through the liquid surface between two phases and is transferred from the raw material liquid to the extractant; after sufficient contact, mass transfer, the two liquid phases are separated into two layers in the separator due to the difference in density. The traditional trough type extraction equipment is simple, is applicable to multistage continuous extraction operation, has high extraction efficiency, but has the defects of openness, complex process and the like; in addition, the emulsion is easy to generate when the liquid with larger viscosity is mixed, so that the phase separation is difficult and the separation time is prolonged.
Disclosure of Invention
The purpose of the application is to provide a horizontal liquid-liquid extraction device and a use method thereof, wherein the extraction device has the characteristics of full sealing, multiple extraction stages and the like.
The horizontal liquid-liquid extraction device is characterized by comprising an extraction box with a horizontal tubular structure, wherein a plurality of porous partition boards are arranged on the extraction box at intervals from left to right, the extraction box is divided into a plurality of stages of extraction chambers by the porous partition boards, the center of each porous partition board is provided with a shaft hole, and a plurality of liquid-permeable holes are arranged on the periphery of the outer side of the shaft hole; a stirring shaft is horizontally arranged in the extraction box in a penetrating manner, the stirring shaft is arranged in a shaft hole in the center of the porous partition plate in a penetrating manner, two ends of the extraction box are connected with the stirring shaft in a sealing and rotating manner, and one end of the stirring shaft penetrates out of the extraction box and is connected with a motor through a coupling; at least one layer of stirring blade is fixedly arranged on a stirring shaft in each stage of extraction chamber in the extraction box;
the upper part and the lower part of the first-stage extraction chamber are respectively provided with a light phase inlet pipe and a heavy phase outlet pipe, the upper part and the lower part of the last-stage extraction chamber are respectively provided with a light phase outlet pipe and a heavy phase inlet pipe, and the corresponding pipelines are respectively provided with a control valve.
The horizontal liquid-liquid extraction device is characterized in that a light phase conveying pump is arranged on the light phase inlet pipe, and a heavy phase conveying pump is arranged on the heavy phase inlet pipe; the top of the extraction box is provided with an exhaust port for exhausting the redundant air in the extraction box; in the structure of each porous partition plate, a plurality of liquid-permeable holes are distributed in a multilayer annular array on the outer side of the shaft hole.
The horizontal liquid-liquid extraction device is characterized in that openings are formed in the left end and the right end of the extraction box and matched with sealing heads for sealing, the left end of a stirring shaft is in sealing and rotating connection with the sealing heads at the left end of the extraction box, the right end of the stirring shaft penetrates through a shaft hole in the center of the porous partition plate and then penetrates out of the sealing heads at the right end of the extraction box and is connected with a motor through a coupler, and the sealing and rotating connection is realized between the sealing heads at the right end of the extraction box and the stirring shaft.
The horizontal liquid-liquid extraction device is characterized in that a bracket base for supporting the extraction box is arranged at the bottom of the extraction box, and the bracket base is formed by splicing a plurality of brackets; wherein, adopt flange to splice the installation between a plurality of supports.
The horizontal liquid-liquid extraction device is characterized in that the light phase inlet pipe and the heavy phase outlet pipe are arranged at the rightmost end of the first-stage extraction chamber, and the light phase outlet pipe and the heavy phase inlet pipe are arranged at the leftmost end of the last-stage extraction chamber; the extraction box is divided into a plurality of stages of extraction chambers by porous partition plates, and the volumes of the extraction chambers at each stage are the same;
the horizontal liquid-liquid extraction device is characterized in that the extraction box is formed by sequentially splicing a plurality of cylinder sections, and a porous partition plate is fixedly arranged between ports of two adjacent cylinder sections in a sealing manner; the aperture of the liquid-permeable hole on the porous partition board is 0.5-5mm.
The application method of the horizontal liquid-liquid extraction device is characterized by comprising the following steps of:
1) When the operation is started, an exhaust port at the top of the extraction box is opened, and control valves on the heavy phase outlet pipe and the light phase outlet pipe are closed; then, introducing a light phase solution and a heavy phase solution into the extraction box through a light phase inlet pipe and a heavy phase inlet pipe respectively, closing an exhaust port at the top of the extraction box after the whole extraction box is filled with liquid, and closing control valves on the light phase inlet pipe and the heavy phase inlet pipe to form a fully-closed system in the extraction box;
2) The stirring shaft is started to rotate through the motor, so that the mixed liquid in each extraction chamber of the extraction box is fully stirred and mixed;
3) After the stirring of the step 2) is finished, carrying out one-time liquid exchange, wherein the process of each liquid exchange is as follows: firstly, standing for layering, then opening a corresponding control valve, introducing fresh light phase solution into a first-stage extraction chamber through a light phase inlet pipe, enabling the light phase solution in each stage of extraction chamber to flow towards an adjacent subsequent-stage extraction chamber under the thrust action of liquid, and discharging the light phase solution in a final-stage extraction chamber outwards through a light phase outlet pipe; simultaneously, fresh heavy phase solution is introduced into the last stage extraction chamber through a heavy phase inlet pipe, the heavy phase solution in each stage extraction chamber flows towards the adjacent previous stage extraction chamber under the thrust action of liquid, and the heavy phase solution in the first stage extraction chamber is discharged outwards through a heavy phase outlet pipe; then closing the corresponding control valves completely;
4) And after the operation of the step 3) is finished, repeating the operation of the step 2), and alternately carrying out the step 2) and the step 3), so as to realize multistage mixed extraction between the light-phase solution and the heavy-phase solution.
Further, the volumes of all levels of extraction chambers of the extraction box are the same, the volumes of light phase solutions in all levels of extraction chambers are the same, and the volumes of heavy phase solutions in all levels of extraction chambers are the same; and 3) when the liquid is changed once, the total volume of the introduced fresh light phase solution is equal to the volume of the light phase solution in each stage of extraction chamber, and the total volume of the introduced fresh heavy phase solution is equal to the volume of the heavy phase solution in each stage of extraction chamber.
Compared with the prior art, the beneficial effect that this application obtained is:
the extraction box is of a horizontal tubular structure, and axial flow is not generated due to the change of the density difference of two phases in the extraction process, so that the problem of back mixing can be reduced. The extraction box is divided into a plurality of stages of extraction chambers by the porous partition plates, the inside of the extraction box is totally closed when extraction work is carried out, and the stirring blades rotate on the vertical surface and cannot generate thrust in the horizontal direction on liquid, so that the extraction work in each stage of extraction chambers is mutually independent.
When the extraction box is used for extracting light-phase solution and heavy-phase solution, the light-phase solution can flow step by step from the first-stage extraction chamber to the last-stage extraction chamber through repeated liquid exchange, meanwhile, the heavy-phase solution can flow step by step from the last-stage extraction chamber to the first-stage extraction chamber, the light-phase solution and the heavy-phase solution are subjected to multi-stage extraction processes in the extraction box, the extraction effect is greatly improved through full mixing and contact in each-stage extraction chamber.
Drawings
FIG. 1 is a schematic structural diagram of a horizontal liquid-liquid extraction device of the present application;
fig. 2 is a schematic structural view of the porous separator of the present application.
Detailed Description
The invention will be further illustrated with reference to specific examples, but the scope of the invention is not limited thereto.
Example 1: reference is made to FIGS. 1-2
The horizontal liquid-liquid extraction device comprises an extraction box 8 with a horizontal tubular structure, wherein a plurality of porous partition plates 9 are arranged on the extraction box 8 at intervals from left to right, the porous partition plates 9 divide the extraction box 8 into a plurality of stages of extraction chambers, the center of each porous partition plate 9 is provided with a shaft hole 19, and a plurality of liquid-permeable holes 18 are arranged on the periphery of the outer side of the shaft hole 19; a stirring shaft 13 is horizontally arranged in the extraction box 8 in a penetrating manner, the stirring shaft 13 is arranged in a shaft hole in the center of the porous partition plate 9 in a penetrating manner, two ends of the extraction box 8 are connected with the stirring shaft 13 in a sealing and rotating manner, and one end of the stirring shaft 13 penetrates out of the extraction box 8 and is connected with the motor 1 through the coupling 2; in the extraction box 8, at least one layer of stirring blade 11 is fixedly arranged on a stirring shaft 13 in each stage of extraction chamber.
The extraction box 8 is provided with a light phase inlet pipe 3 and a heavy phase outlet pipe 4 respectively from right to left, the upper part and the lower part of the first-stage extraction chamber are respectively provided with a light phase outlet pipe 10 and a heavy phase inlet pipe 16 respectively, and the corresponding pipelines are respectively provided with control valves.
Referring to fig. 1, a light phase conveying pump 6 is arranged on a light phase inlet pipe 3, and a heavy phase conveying pump 15 is arranged on a heavy phase inlet pipe 16; the top of the extraction box 8 is provided with an exhaust port 12 for exhausting the redundant air in the extraction box 8.
Further, openings are formed in the left end and the right end of the extraction box 8, sealing heads for sealing are mounted in a matched mode, the left end of the stirring shaft 13 is in sealing and rotating connection with the sealing heads of the left end of the extraction box 8, the right end of the stirring shaft 13 penetrates through a shaft hole in the center of the porous partition plate 9, then penetrates out of the sealing heads of the right end of the extraction box 8 and is connected with the motor 1 through the coupler 2, and the sealing and rotating connection between the sealing heads of the right end of the extraction box 8 and the stirring shaft 13 is achieved.
Referring to fig. 1, a bracket base for supporting the extraction box 8 is arranged at the bottom of the extraction box, and the bracket base is formed by splicing a plurality of brackets 17; wherein, the plurality of brackets 17 are spliced and installed by adopting the connecting flange 7.
Referring to fig. 1, the light phase inlet pipe 3 and the heavy phase outlet pipe 4 are both disposed at the rightmost end of the first stage extraction chamber, and the light phase outlet pipe 10 and the heavy phase inlet pipe 16 are both disposed at the leftmost end of the last stage extraction chamber; the extraction box 8 is divided into a plurality of stages of extraction chambers by porous partition plates 9, and the volumes of the extraction chambers of each stage are the same.
In this application, extraction case 8 is formed by a plurality of sections concatenation in proper order, seals fixed mounting between the port of two adjacent sections one porous baffle 9 separates through a porous baffle 9 between two adjacent sections promptly. After the splicing of the cylinder sections is completed, the end socket for sealing is installed at the port of the cylinder section at the outermost side, namely the extraction box is installed. In the practical application process, the number of cylinder sections used when the extraction box 8 is installed is changed, namely the number of extraction chamber stages of the extraction box 8 can be changed, the operation elasticity is good, and the method can be suitable for extraction work under different production conditions.
In this application, be equipped with the liquid hole that permeates on the porous baffle, but the aperture of the liquid hole 18 that permeates on the porous baffle 9 is 0.5-5mm, and the aperture of liquid hole 18 is less for liquid passes through the obvious resistance of permeating liquid Kong Shiyou, and the extraction case of this application during operation under totally closed state, the effect of axial thrust is not basically had to liquid, and the liquid in the adjacent two-stage extraction room does not produce back mixing basically in the extraction work. Therefore, when the stirring extraction work is carried out, the extraction chambers at all levels are mutually independent. And layering after stirring, wherein the light phase solution is arranged on the upper layer, the heavy phase solution is arranged on the lower layer, and when the liquid is changed, the upper layer liquid and the lower layer liquid in the adjacent two-stage extraction chambers reversely flow under the thrust action of the introduced fresh liquid, and the next-stage extraction process is respectively carried out.
Example 2:
the extraction box of the horizontal liquid-liquid extraction device has a structure shown in figure 1, the extraction box is divided into 5 stages of extraction chambers by porous partition boards, and the volume of each stage of extraction chamber is 2L. When the extraction tank is filled with liquid, the upper part of each stage of extraction chamber contains 1L of light phase solution, and the lower part contains 1L of heavy phase solution.
In the structure of the extraction box, the aperture of the liquid-permeable hole on the porous partition plate is 2mm.
The light phase solution is n-octane containing 0.38wt% of benzoic acid, and the heavy phase solution is deionized water.
In this example 2, the horizontal liquid-liquid extraction apparatus shown in fig. 1 was used to extract the light phase solution and the heavy phase solution, and the operation procedure was as follows:
1) When the operation is started, the exhaust port 12 at the top of the extraction box 8 is opened, and the control valves on the heavy phase outlet pipe 4 and the light phase outlet pipe 10 are closed; then, the light phase solution and the heavy phase solution are respectively introduced into the extraction box 8 through the light phase inlet pipe 3 and the heavy phase inlet pipe 16, when the whole extraction box 8 is filled with the liquid, the exhaust port 12 at the top of the extraction box 8 is closed, and the control valves on the light phase inlet pipe 3 and the heavy phase inlet pipe 16 are closed, so that a fully-closed system is formed in the extraction box 8;
2) The stirring shaft 13 is started to rotate by the motor 1 and stirred for 1h at a rotating speed of 400rpm, so that the mixed liquid in each extraction chamber of the extraction box 8 is fully stirred and mixed;
3) After the stirring of the step 2) is finished, carrying out one-time liquid exchange, wherein the process of each liquid exchange is as follows: and standing and layering to make the light phase solution in each stage of extraction chamber be in the upper layer and the heavy phase solution be in the lower layer. Then corresponding control valves are opened, fresh light phase solution is introduced into the first-stage extraction chamber through the light phase inlet pipe 3, the light phase solution in each stage of extraction chamber flows towards the adjacent next-stage extraction chamber under the thrust action of liquid, and the light phase solution in the last-stage extraction chamber is discharged outwards through the light phase outlet pipe 10; simultaneously, fresh heavy phase solution is introduced into the last stage extraction chamber through the heavy phase inlet pipe 16, the heavy phase solution in each stage extraction chamber flows towards the adjacent previous stage extraction chamber under the thrust action of liquid, and the heavy phase solution in the first stage extraction chamber is discharged outwards through the heavy phase outlet pipe 4; then closing the corresponding control valves completely;
4) And after the operation of the step 3) is finished, repeating the operation of the step 2), and alternately carrying out the step 2) and the step 3), so as to realize multistage mixed extraction between the light-phase solution and the heavy-phase solution.
In the operation process, when the liquid is changed once in the step 3), the total volume of the introduced fresh light phase solution and the total volume of the introduced fresh heavy phase solution are equal to 1L. Accordingly, the volume of the liquid discharged through the heavy phase outlet pipe 4 and the volume of the liquid discharged from the light phase outlet pipe 10 are equal to 1L each time the liquid change is performed.
In the previous extraction process, the fresh light phase solution introduced into the extraction tank 8 needs to be intermittently extracted once in the first, second, third, fourth and fifth extraction chambers in sequence, i.e. the light phase solution undergoes a 5-stage extraction process in the extraction tank 8. The fresh heavy phase solution introduced into the extraction tank 8 needs to be intermittently extracted once in the fifth, fourth, third, second and first stage extraction chambers in sequence, i.e. the heavy phase solution undergoes a 5-stage extraction process in the extraction tank 8.
When the operation of the previous extraction process was stabilized, the light phase solution subjected to the 5-stage extraction process discharged from the light phase outlet pipe 10 was subjected to detection analysis, and as a result, "the benzoic acid concentration in n-octane became 0.055 wt%.
Comparative example 1:
the extraction tank structure of comparative example 1 was similar to that of example 2, except that "porous partition plates were not provided in the extraction tank structure of comparative example 1", and the remaining structure was the same as that of example 2.
The light phase solution is n-octane containing 0.38wt% of benzoic acid, and the heavy phase solution is deionized water.
In comparative example 1, the light phase solution and the heavy phase solution were extracted by a horizontal liquid-liquid extraction apparatus, and the working procedure was as follows:
1) When the operation is started, the exhaust port 12 at the top of the extraction box 8 is opened, and the control valves on the heavy phase outlet pipe 4 and the light phase outlet pipe 10 are closed; then, the light phase solution and the heavy phase solution are respectively introduced into the extraction box 8 through the light phase inlet pipe 3 and the heavy phase inlet pipe 16, when the whole extraction box 8 is filled with the liquid, the exhaust port 12 at the top of the extraction box 8 is closed, and the control valves on the light phase inlet pipe 3 and the heavy phase inlet pipe 16 are closed, so that a fully-closed system is formed in the extraction box 8;
2) The stirring shaft 13 is started to rotate by the motor 1 and stirred for 1h at a rotating speed of 400rpm, so that the mixed liquid in each extraction chamber of the extraction box 8 is fully stirred and mixed;
3) After the stirring of the step 2) is finished, carrying out one-time liquid exchange, wherein the process of each liquid exchange is as follows: and standing and layering to make the light phase solution in each stage of extraction chamber be in the upper layer and the heavy phase solution be in the lower layer. Then the corresponding control valve is opened, fresh light phase solution is introduced into the extraction tank 8 through the light phase inlet pipe 3, and the extracted light phase solution is discharged outwards through the light phase outlet pipe 10. Fresh heavy phase solution is introduced into the extraction tank 8 through the heavy phase inlet pipe 16, and the extracted heavy phase solution is discharged outwards through the heavy phase outlet pipe 4; then closing the corresponding control valves completely;
4) And after the operation of the step 3) is finished, repeating the operation of the step 2), and alternately carrying out the step 2) and the step 3), so as to realize repeated liquid exchange in the extraction process.
In the operation process, when the liquid is changed once in the step 3), the total volume of the introduced fresh light phase solution and the total volume of the introduced fresh heavy phase solution are equal to 1L. Accordingly, the volume of the liquid discharged through the heavy phase outlet pipe 4 and the volume of the liquid discharged from the light phase outlet pipe 10 are equal to 1L each time the liquid change is performed.
In the above extraction process, after 5 liquid changes were performed, the light phase solution discharged from the light phase outlet pipe 10 after 5 liquid changes extraction was subjected to detection analysis, and as a result, "the benzoic acid concentration in n-octane became 0.179wt%".
What has been described in this specification is merely an enumeration of possible forms of implementation for the inventive concept and may not be considered limiting of the scope of the present invention to the specific forms set forth in the examples.
Claims (7)
1. The application method of the horizontal liquid-liquid extraction device is characterized in that the device comprises an extraction box (8) with a horizontal tubular structure, a plurality of porous partition boards (9) are arranged on the extraction box (8) at intervals from left to right, the porous partition boards (9) divide the extraction box (8) into a plurality of stages of extraction chambers, the center of each porous partition board (9) is provided with a shaft hole (19), and a plurality of liquid-permeable holes (18) are arranged on the periphery of the outer side of the shaft hole (19);
a stirring shaft (13) is horizontally arranged in the extraction box (8) in a penetrating way, the stirring shaft (13) is arranged in a shaft hole in the center of the porous partition plate (9) in a penetrating way, two ends of the extraction box (8) are connected with the stirring shaft (13) in a sealing and rotating way, and one end of the stirring shaft (13) penetrates out of the extraction box (8) and is connected with a motor (1) through a coupler (2); in the extraction box (8), at least one layer of stirring blade (11) is fixedly arranged on a stirring shaft (13) in each stage of extraction chamber;
the upper part and the lower part of the first-stage extraction chamber are respectively provided with a light-phase inlet pipe (3) and a heavy-phase outlet pipe (4), the upper part and the lower part of the last-stage extraction chamber are respectively provided with a light-phase outlet pipe (10) and a heavy-phase inlet pipe (16), and the corresponding pipelines are respectively provided with a control valve;
the application method of the horizontal liquid-liquid extraction device comprises the following steps:
1) When the operation is started, an exhaust port (12) at the top of the extraction box (8) is opened, and control valves on the heavy phase outlet pipe (4) and the light phase outlet pipe (10) are closed; then, a light phase solution and a heavy phase solution are respectively introduced into the extraction box (8) through the light phase inlet pipe (3) and the heavy phase inlet pipe (16), after the whole extraction box (8) is filled with the liquid, an air outlet (12) at the top of the extraction box (8) is closed, and control valves on the light phase inlet pipe (3) and the heavy phase inlet pipe (16) are closed, so that a fully-closed system is formed in the extraction box (8);
2) The stirring shaft (13) is started to rotate through the motor (1), so that the mixed liquid in each extraction chamber of the extraction box (8) is fully stirred and mixed;
3) After the stirring of the step 2) is finished, carrying out one-time liquid exchange, wherein the process of each liquid exchange is as follows: firstly, standing and layering, then opening a corresponding control valve, introducing fresh light phase solution into a first-stage extraction chamber through a light phase inlet pipe (3), enabling the light phase solution in each stage of extraction chamber to flow towards an adjacent subsequent-stage extraction chamber under the thrust action of liquid, and discharging the light phase solution in a final-stage extraction chamber outwards through a light phase outlet pipe (10); simultaneously, fresh heavy phase solution is introduced into the last stage extraction chamber through a heavy phase inlet pipe (16), the heavy phase solution in each stage extraction chamber flows towards the adjacent previous stage extraction chamber under the thrust action of liquid, and the heavy phase solution in the first stage extraction chamber is discharged outwards through a heavy phase outlet pipe (4); then closing the corresponding control valves completely;
4) And after the operation of the step 3) is finished, repeating the operation of the step 2), and alternately carrying out the step 2) and the step 3), so as to realize multistage mixed extraction between the light-phase solution and the heavy-phase solution.
2. The use method of the horizontal liquid-liquid extraction device as claimed in claim 1, characterized in that the light phase inlet pipe (3) is provided with a light phase conveying pump (6), and the heavy phase inlet pipe (16) is provided with a heavy phase conveying pump (15); an exhaust port (12) is arranged at the top of the extraction box (8) so as to exhaust the redundant air in the extraction box (8); in the structure of each porous partition plate (9), a plurality of liquid-permeable holes (18) are distributed in a multilayer annular array outside the shaft hole.
3. The use method of the horizontal liquid-liquid extraction device as claimed in claim 1, characterized in that openings are formed in the left end and the right end of the extraction box (8) and are matched with sealing heads for sealing, the left end of the stirring shaft (13) is in sealing rotation connection with the left end sealing head of the extraction box (8), the right end of the stirring shaft (13) penetrates through a shaft hole in the center of the porous partition plate (9) and then penetrates out of the right end sealing head of the extraction box (8) and is connected with the motor (1) through the coupler (2), and the right end sealing head of the extraction box (8) is in sealing rotation connection with the stirring shaft (13).
4. The use method of the horizontal liquid-liquid extraction device as claimed in claim 1, characterized in that a bracket base for supporting the extraction box (8) is arranged at the bottom of the extraction box, and the bracket base is formed by splicing a plurality of brackets (17); wherein, adopt flange (7) to splice between a plurality of supports (17) and install.
5. The method of using a horizontal liquid-liquid extraction apparatus as claimed in claim 1, wherein the light phase inlet pipe (3) and the heavy phase outlet pipe (4) are disposed at the rightmost end of the first stage extraction chamber, and the light phase outlet pipe (10) and the heavy phase inlet pipe (16) are disposed at the leftmost end of the last stage extraction chamber; the extraction box (8) is divided into a plurality of stages of extraction chambers by porous partition plates (9) on average, and the volumes of the extraction chambers at all stages are the same.
6. The use method of the horizontal liquid-liquid extraction device as claimed in claim 1, characterized in that the extraction box (8) is formed by sequentially splicing a plurality of cylinder sections, and a porous partition plate (9) is fixedly arranged between the ports of two adjacent cylinder sections in a sealing way; the aperture of the liquid-permeable holes (18) on the porous partition plate (9) is 0.5-5mm.
7. The method of using a horizontal liquid-liquid extraction apparatus as claimed in claim 1, characterized in that the volumes of the extraction chambers of the extraction box (8) are identical, the volumes of the light phase solutions in the extraction chambers of the extraction chambers are identical, and the volumes of the heavy phase solutions in the extraction chambers of the extraction chambers are identical; and 3) when the liquid is changed once, the total volume of the introduced fresh light phase solution is equal to the volume of the light phase solution in each stage of extraction chamber, and the total volume of the introduced fresh heavy phase solution is equal to the volume of the heavy phase solution in each stage of extraction chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011448385.XA CN112494988B (en) | 2020-12-11 | 2020-12-11 | Horizontal liquid-liquid extraction device and application method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011448385.XA CN112494988B (en) | 2020-12-11 | 2020-12-11 | Horizontal liquid-liquid extraction device and application method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112494988A CN112494988A (en) | 2021-03-16 |
| CN112494988B true CN112494988B (en) | 2023-12-19 |
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