Axial-radial dynamic extraction tower

Abstract

The invention belongs to the technical field of separation equipment, and particularly relates to an axial-radial dynamic extraction tower. Aiming at the problem that trays in the prior art can only move in a single direction, the invention provides the axial-radial dynamic extraction tower which comprises a tower body with an extraction chamber inside, a main shaft is arranged in the extraction chamber, one end of the main shaft is in driving connection with a driving motor, and the main shaft is also fixedly connected with the trays; a driving box used for power transmission is further arranged between the driving motor and the main shaft, an eccentric swash plate assembly is further arranged in the driving box, and the main shaft can be driven to reciprocate in the axial direction by rotating the eccentric swash plate assembly. The eccentric swash plate assembly capable of driving the main shaft to reciprocate in the axial direction during rotation is arranged in the driving box, so that in the extraction process, the tray can rotate and axially move at the same time, the space in the extraction tower is fully played, generated strong shearing force promotes a dispersed phase to be repeatedly dispersed and polymerized in a continuous phase, solute transfer is promoted, and the extraction efficiency is improved. Therefore, the mass transfer efficiency is improved, and efficient separation is realized.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of separation equipment, and particularly relates to a shaft radial dynamic extraction column. BACKGROUND

[0002] The extraction column is a liquid-liquid mass transfer equipment commonly used in chemical industry, petroleum refining, fine chemical industry, medicine and pesticide intermediates. It extracts one or n compounds in a mixed solution with another solvent that is immiscible with the mixed solution. Through the extraction column internals, tray or packing, the compounds are separated, enriched and purified. Currently, commonly used extraction columns include packing extraction column, sieve plate extraction column, rotating disc extraction column and vibrating disc extraction column. Although the rotating disc extraction column in the prior art improves the axial shear force by rotation, and the vibrating tray extraction column improves the radial shear force by reciprocating motion, both can only move in a single direction, and cannot effectively utilize the internal space of the extraction column. The extraction efficiency and effect need to be further improved.

[0003] For example, a rotating disc extraction column is disclosed in a Chinese invention patent [application number: 200910035622.7]. The invention patent includes a column body, a rotating shaft, a rotator, a power mechanism, an upper settling tank with a heavy phase introduction interface and a light phase introduction interface, a lower settling tank with a light phase introduction interface and a heavy phase introduction interface, and a baffle plate with baffle plate through holes distributed on the disc surface. The rotating shaft is arranged in the column body and is drivingly connected with the power mechanism. The power mechanism is arranged at the top of the upper settling tank. The upper settling tank is connected to the upper part of the column body, and the lower settling tank is connected to the lower part of the column body. The rotator is fixed on the rotating shaft at intervals. The baffle plates are distributed at intervals along the height direction of the rotating shaft. The central part of each baffle plate is sleeved on the rotating shaft, and the periphery is fixed with the inner wall of the column body. Each two adjacent baffle plates have a rotator therebetween. The rotator includes a paddle seat and first and second paddles. The paddle seat is fixed on the rotating shaft. The first and second paddles are arranged on the paddle seat. The first and second paddles are arranged alternately. The first inclination on the first paddle and the second inclination on the second paddle are opposite to each other.

[0004] The invention patent provides a traditional rotating disc extraction column structure, which can only improve the axial shear force by rotation, and still has the above problems. SUMMARY

[0005] The purpose of the present application is to solve the above problems, and to provide a shaft radial dynamic extraction column.

[0006] To achieve the above purpose, the present application adopts the following technical solutions:

[0007] A kind of shaft radial dynamic extraction tower, including the tower body with extraction chamber in inside, main shaft is equipped in the extraction chamber, one end of the main shaft is drivenly connected with drive motor, tower tray is also fixedly connected on the main shaft, drive box for power transmission is also equipped between the drive motor and the main shaft, eccentric swash plate assembly is also equipped in the drive box, and the eccentric swash plate assembly can drive the main shaft to reciprocate along the axial direction by rotating.

[0008] In the above-mentioned shaft radial dynamic extraction tower, the drive box includes an outer housing with an installation space inside, a driving shaft and a driven shaft are fixedly connected to the outer housing in a circumferential direction and axially slideable, the driving shaft is drivingly connected to the drive motor, the driven shaft is drivingly connected to the main shaft, and the eccentric swash plate assembly is located in the installation space and connected to the driven shaft.

[0009] In the above-mentioned shaft radial dynamic extraction tower, the driving shaft has a recessed groove near one end of the driven shaft, the end of the driven shaft extends into the recessed groove, and the driven shaft has an expansion space between the end and the bottom of the recessed groove.

[0010] In the above-mentioned shaft radial dynamic extraction tower, the eccentric swash plate assembly includes two eccentric discs fixedly connected to the outer surface of the driven shaft and a swing rod assembly sleeved on the outer surface of the driven shaft, and the swing rod assembly is connected to the eccentric discs through two thrust bearings respectively.

[0011] In the above-mentioned shaft radial dynamic extraction tower, the swing rod assembly includes a sleeve and a swing rod fixedly connected to the sleeve, the sleeve is connected to the driven shaft or the eccentric disc through a needle bearing, one end of the swing rod is a free end, and the other end is provided with a swing ball, and the swing ball is rotatably connected to the outer housing.

[0012] In the above-mentioned shaft radial dynamic extraction tower, the swing rod assembly further includes a guide groove in the side surface of the outer housing and in a strip shape, and a bearing is connected to the free end, and the free end is located in the guide groove and connected to the guide groove through the bearing.

[0013] In the above-mentioned shaft radial dynamic extraction tower, the eccentric disc includes an integral connecting part and a deflection part, the driven shaft penetrates through the connecting part, and the deflection part is arranged obliquely along the axial line of the driven shaft, and the phase angles of the two eccentric discs are 180 degrees apart.

[0014] In the above-mentioned shaft radial dynamic extraction tower, the tower body is further provided with a light liquid inlet, a heavy liquid inlet, a light liquid outlet and a heavy liquid outlet connected to the extraction chamber, the light liquid inlet and the heavy liquid outlet are located in the lower half of the tower body, and the heavy liquid inlet and the light liquid outlet are located in the upper half of the tower body.

[0015] In the axial-radial dynamic extraction column, the trays are arranged in parallel and sequentially along the axial center line of the main shaft, and the distance between two adjacent trays is equal.

[0016] In the axial-radial dynamic extraction column, the tray comprises a tray body, an axial hole penetrating the tray body is arranged at the center of the tray body, the main shaft is connected to the axial hole, and a plurality of convection holes are further arranged on the tray body, the convection holes penetrate the tray body, and the diameters of the convection holes are different.

[0017] Compared with the prior art, the axial-radial dynamic extraction column has the following advantages:

[0018] 1. The eccentric swash plate assembly is arranged in the driving box and can drive the main shaft to move reciprocally along the axial direction when rotating, so that the tray can rotate and move axially at the same time during the extraction process. In this way, the tray can move in the axial and radial directions, the space in the extraction column is fully utilized, the strong shearing force is generated to promote the dispersion and aggregation of the dispersed phase in the continuous phase, the solute transfer is promoted, the mass transfer efficiency is improved, and efficient separation is achieved. In addition, the vortex generated by the single motion trajectory can be eliminated.

[0019] 2. The convection holes with different diameters are arranged on the tray body, the vortex and dispersion effect of the two liquids flowing in the reverse direction in the tower are enhanced, and higher mass transfer efficiency can be obtained. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a structural schematic diagram of the present application;

[0021] Figure 2 is a schematic diagram of the internal structure of the driving box;

[0022] Figure 3 is a sectional view of the driving box and the eccentric swash plate assembly;

[0023] Figure 4 is a sectional view of the eccentric swash plate assembly from another angle;

[0024] Figure 5 is a perspective view of the driving box;

[0025] Figure 6 is a partial structural schematic diagram of the tray;

[0026] In the figure: extraction chamber 1, tower body 2, main shaft 3, driving motor 4, tray 5, driving box 6, eccentric swash plate assembly 7, light liquid inlet 8, heavy liquid inlet 9, light liquid outlet 10, heavy liquid outlet 11, disc body 51, shaft hole 52, convection hole 53, mounting space 61, outer shell 62, driving shaft 63, driven shaft 64, recess 65, telescopic space 66, eccentric disc 71, swing rod assembly 72, thrust bearing 73, connecting part 711, deflection part 712, collar 721, swing rod 722, free end 723, swing ball 724, guide groove 725, bearing 726, needle roller bearing 727. DETAILED DESCRIPTION

[0027] The application will be further described in detail below in combination with the drawings and specific embodiments.

[0028] In combination Figure 1 And Figure 2 As shown in the figure, a shaft radial dynamic extraction tower comprises a tower body 2 with an extraction chamber 1 inside, a main shaft 3 arranged in the extraction chamber 1, a driving motor 4 drivingly connected to one end of the main shaft 3, a tray 5 fixedly connected to the main shaft 3, and a driving box 6 arranged between the driving motor 4 and the main shaft 3 for power transmission, and an eccentric swash plate assembly 7 arranged in the driving box 6, wherein the rotation of the eccentric swash plate assembly 7 can drive the main shaft 3 to reciprocate along the axial direction.

[0029] In use, the driving motor 4 drives the main shaft 3 to rotate through the driving box 6, so that the tray 5 fixedly connected to the main shaft 3 also rotates. At the same time, the eccentric swash plate assembly 7 arranged in the driving box 6 drives the main shaft 3 to reciprocate along the axial direction when the eccentric swash plate assembly 7 rotates synchronously, so that the tray 5 also moves repeatedly along the axial line of the main shaft 3. Therefore, the eccentric swash plate assembly 7 arranged in the driving box 6 can drive the main shaft 3 to reciprocate along the axial direction when rotating, so that the tray 5 can rotate and move axially at the same time during the extraction process. In this way, on the one hand, the motion in the axial and radial directions can be realized, the space inside the extraction tower can be fully utilized, the strong shear force generated can promote the dispersion and aggregation of the dispersed phase in the continuous phase, promote the solute transfer, thereby improving the mass transfer efficiency and realizing high-efficiency separation. On the other hand, the vortex generated due to single motion trajectory can be eliminated.

[0030] Preferably, a plurality of the trays 5 are arranged in parallel and sequentially along the axial line of the main shaft 3, and the distance between adjacent two trays 5 is equal. In this way, the radial or axial shear force generated by the rotation or movement of the tray 5 can be more evenly distributed in the entire extraction chamber 1.

[0031] As Figure 6As shown, the tray 5 comprises a disc body 51, the disc body 51 is provided with an axial hole 52 penetrating the disc body 51 at a central position, the main shaft 3 is connected in the axial hole 52, and a plurality of convection holes 53 are further provided on the disc body 51, the convection holes 53 penetrate the disc body 51 and the diameters of the convection holes 53 are not uniform. That is, the diameters of the convection holes 53 are not set to be uniform. The present application sets the convection holes 53 with different diameters on the disc body 51, which strengthens the vortex and dispersion of the two liquids in the counter flow in the tower, and higher mass transfer efficiency can be obtained.

[0032] In combination Figure 2 And Figure 3 As shown, the drive box 6 comprises an outer shell 62 with an installation space 61 inside, a driving shaft 63 and a driven shaft 64 are fixedly connected in the circumferential direction and axially slidably connected on the outer shell 62, the driving shaft 63 is drivingly connected with the driving motor 4, the driven shaft 64 is drivingly connected with the main shaft 3, and the eccentric swash plate assembly 7 is located in the installation space 61 and connected on the driven shaft 64. The specific implementation mode of the circumferentially fixed and axially slidably connected structure is not limited in the present application, and the commonly used connection structure in the prior art can be adopted, for example, the spline connection, as long as the driving shaft 63 and the driven shaft 64 can be relatively fixed in the circumferential direction to perform synchronous rotating movement, and can relatively slide in the axial direction to perform synchronous axial movement, so that the driven shaft 64 can move in the axial direction without synchronous axial movement of the driving shaft 63.

[0033] Specifically, the driving shaft 63 has a recess 65 inwardly recessed at one end close to the driven shaft 64, one end of the driven shaft 64 extends into the recess 65, and the driven shaft 64 has an expansion space 66 between the end and the bottom of the recess 65. The recess 65 cooperates with the end of the driven shaft 64 to play a certain guiding role when the driven shaft 64 slides. The expansion space 66 ensures that the driven shaft 64 has a space to slide relative to the driving shaft 63.

[0034] In combination Figures 2-5 As shown, the eccentric swash plate assembly 7 comprises two eccentric discs 71 fixedly connected on the outer surface of the driven shaft 64 and a swing rod assembly 72 sleeved on the outer surface of the driven shaft 64, and the swing rod assembly 72 is connected with the eccentric discs 71 through the two thrust bearings 73 on the two sides.

[0035] Specifically, the swing rod assembly 72 comprises a sleeve ring 721 and a swing rod 722 fixedly connected on the sleeve ring 721, the sleeve ring 721 is connected with the driven shaft 64 or the eccentric disc 71 through the needle bearing 727, one end of the swing rod 722 is a free end 723, the other end is provided with a swing ball 724, and the swing ball 724 is rotatably connected on the outer shell 62.

[0036] Preferably, the swing lever assembly 72 further comprises a guiding groove 725 in the shape of a long strip formed on the side of the outer housing 62, and the free end 723 is connected with a bearing 726, and the free end 723 is located in the guiding groove 725 and is in sliding connection with the guiding groove 725 through the bearing 726. In this way, the friction between the free end 723 and the guiding groove 725 can be reduced.

[0037] As shown in Figure 2 The eccentric disc 71 comprises an integral connecting portion 711 and a deflection portion 712, the driven shaft 64 penetrates through the connecting portion 711, and the deflection portion 712 is arranged obliquely along the axial line direction of the driven shaft 64, and the phase angles of the two eccentric discs 71 are different by 180 degrees.

[0038] In use, the driven shaft 64 rotates to drive the synchronous rotation of the eccentric disc 71. Since the driven shaft 64 is eccentrically arranged on the connecting portion 711, and the deflection portion 712 is arranged in the form of an inclined surface obliquely along the axial line direction of the driven shaft 64, that is, there is a difference in the front and back positions in the axial line direction between the one end of the deflection portion 712 and the projection of the other end of the deflection portion 712 on the driven shaft 64. In this way, when the deflection portion 712 rotates, the sleeve ring 721 can be pushed to swing by the thrust bearing 73, so as to drive the driven shaft 64 to move along the axial line direction. The phase angles of the two eccentric discs 71 are different by 180 degrees, so that the thrust forces generated by the two deflection portions 712 on the two sides of the sleeve ring 721 are alternately generated, so that the sleeve ring 721 realizes the reciprocating swing. At this time, the swing ball 724 rotates relative to the outer housing 62, and the free end 723 moves repeatedly along the guiding groove 725, and the guiding groove 725 plays a certain guiding role on the moving direction of the free end 723.

[0039] As shown in Figure 1 The tower body 2 is further provided with a light liquid inlet 8, a heavy liquid inlet 9, a light liquid outlet 10 and a heavy liquid outlet 11 which are in communication with the extraction chamber 1. The light liquid inlet 8 and the heavy liquid outlet 11 are located in the lower half of the tower body 2, and the heavy liquid inlet 9 and the light liquid outlet 10 are located in the upper half of the tower body 2. In this way, the heavy liquid and the light liquid can have more sufficient contact, so as to ensure the extraction effect.

[0040] The working principle of the present application is that the raw material liquid to be extracted and separated is added into the extraction chamber 1 through the light liquid inlet 8 and the heavy liquid inlet 9, the driving motor 4 is started, the driving motor 4 drives the driving shaft 63 to rotate, the driving shaft 63 further drives the driven shaft 64 to rotate, the driven shaft 64 rotates to drive the eccentric discs 71 to rotate synchronously, the driven shaft 64 is eccentrically arranged on the connecting part 711, and the deflection part 712 is a slope structure arranged along the axis line direction of the driven shaft 64, that is, the projection of one end of the deflection part 712 and the other end of the deflection part 712 on the driven shaft 64 has a front and back position difference in the axis line direction, so that the deflection part 712 can drive the sleeve ring 721 to swing through the thrust bearing 73 when rotating, thereby driving the driven shaft 64 to move along the axis line direction, the phase angles of the two eccentric discs 71 are different by 180 degrees, the two deflection parts 712 can make the thrust forces generated on both sides of the sleeve ring 721 alternate, thereby making the sleeve ring 721 realize reciprocating swing. At this time, the swing ball 724 rotates relative to the outer shell 62, the free end 723 moves along the guide groove 725 repeatedly, and the guide groove 725 plays a certain guiding role on the moving direction. The driven shaft 64 synchronously transmits the rotation and the thrust to the main shaft 3, so that the main shaft 3 drives the tray 5 to also move repeatedly along the axis line direction of the main shaft 3 and rotate along the radial direction of the main shaft 3. Therefore, the eccentric swash plate assembly 7 which can drive the main shaft 3 to move reciprocally along the axis direction when rotating is arranged in the driving box 6, so that the tray 5 can rotate and move axially at the same time during the extraction process of the present application. In this way, on the one hand, movement in the axial and radial directions can be realized, the space in the extraction tower is fully utilized, strong shear force is generated to promote the dispersed phase to repeatedly disperse and aggregate in the continuous phase, promote solute transfer, thereby improving the mass transfer efficiency and realizing high-efficiency separation. On the other hand, vortex generated due to single motion trajectory can be eliminated.

[0041] The specific embodiments described herein merely exemplify the spirit of the present application. Those skilled in the art to which the present application belongs can make various modifications or supplements to the described specific embodiments or replace them with similar ways, without departing from the spirit of the present application or exceeding the scope defined by the appended claims.

[0042] Although the terms extraction chamber 1, tower body 2, main shaft 3, driving motor 4, tray 5, driving box 6, eccentric swash plate assembly 7, light liquid inlet 8, heavy liquid inlet 9, light liquid outlet 10, heavy liquid outlet 11, disc body 51, shaft hole 52, convection hole 53, mounting space 61, outer shell 62, driving shaft 63, driven shaft 64, recess 65, telescopic space 66, eccentric disc 71, swing lever assembly 72, thrust bearing 73, connecting part 711, deflection part 712, collar 721, swing lever 722, free end 723, swing ball 724, guide groove 725, bearing 726, needle roller bearing 727, etc. are used more frequently in the text, the possibility of using other terms is not excluded. The use of these terms is only for the convenience of describing and explaining the essence of the present application; any kind of additional limitation is contrary to the spirit of the present application.

Claims

1. A shaft radial dynamic extraction column, comprising a column body (2) with an extraction chamber (1) inside, a main shaft (3) is arranged in the extraction chamber (1), one end of the main shaft (3) is drivingly connected with a driving motor (4), and a column tray (5) is further fixedly connected on the main shaft (3), characterized in that: The driving motor (4) and the main shaft (3) are further provided with a driving box (6) for power transmission, and the driving box (6) is further provided with an eccentric swash plate assembly (7), and rotating the eccentric swash plate assembly (7) can drive the main shaft (3) to reciprocate along the axial direction.

2. A radial flow dynamic extraction column according to claim 1 wherein: The driving box (6) comprises an outer shell (62) with an installation space (61) inside, and a driving shaft (63) and a driven shaft (64) are fixedly and axially slidably connected on the outer shell (62), the driving shaft (63) is drivingly connected with the driving motor (4), the driven shaft (64) is drivingly connected with the main shaft (3), and the eccentric swash plate assembly (7) is located in the installation space (61) and connected on the driven shaft (64).

3. A radial flow dynamic extraction column according to claim 2 wherein: The driving shaft (63) has a recess (65) recessed inward at one end close to the driven shaft (64), one end of the driven shaft (64) extends into the recess (65), and the driven shaft (64) has an expansion space (66) between the end and the bottom of the recess (65).

4. A radial flow dynamic extraction column according to claim 2 wherein: The eccentric swash plate assembly (7) comprises two eccentric discs (71) fixedly connected on the outer surface of the driven shaft (64) and a swing rod assembly (72) sleeved on the outside of the driven shaft (64), and the swing rod assembly (72) is connected with the eccentric discs (71) through the thrust bearings (73) on both sides.

5. A radial flow dynamic extraction column according to claim 4 wherein: The swing rod assembly (72) comprises a sleeve ring (721) and a swing rod (722) fixedly connected on the sleeve ring (721), the sleeve ring (721) is connected with the driven shaft (64) or the eccentric disc (71) through the needle bearing (727), one end of the swing rod (722) is a free end (723), the other end is provided with a swing ball (724), and the swing ball (724) is rotatably connected on the outer shell (62).

6. A radial flow dynamic extraction column according to claim 5 wherein: The swing rod assembly (72) further comprises a guide groove (725) in the shape of a long strip opened on the side surface of the outer shell (62), and the free end (723) is connected with a bearing (726) and is slidably connected with the guide groove (725) through the bearing (726).

7. A radial flow dynamic extraction column according to claim 4 wherein: The eccentric disc (71) comprises an integral connecting portion (711) and a deflection portion (712), the driven shaft (64) penetrates through the connecting portion (711), the deflection portion (712) is arranged obliquely along the axial line of the driven shaft (64), and the phase angles of the two eccentric discs (71) are 180 degrees apart.

8. A radial flow dynamic extraction column according to claim 1 wherein: The tower body (2) is further provided with a light liquid inlet (8), a heavy liquid inlet (9), a light liquid outlet (10) and a heavy liquid outlet (11) which are connected with the extraction chamber (1), the light liquid inlet (8) and the heavy liquid outlet (11) are located in the lower half of the tower body (2), and the heavy liquid inlet (9) and the light liquid outlet (10) are located in the upper half of the tower body (2).

9. A radial flow dynamic extraction column according to claim 1 wherein: The tower trays (5) are arranged in parallel and sequentially along the axial line of the main shaft (3), and the distance between adjacent two tower trays (5) is equal.

10. A radial flow dynamic extraction column according to claim 1 wherein: The tray (5) comprises a disc body (51) provided with an axial hole (52) penetrating the disc body (51) at a central position, the main shaft (3) is connected in the axial hole (52), and a plurality of convection holes (53) are further provided on the disc body (51), the convection holes (53) penetrate the disc body (51) and the diameters of the convection holes (53) are not the same.

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