Multi-stage centrifugal extraction mechanism

Abstract

This utility model relates to the field of chemical product extraction technology and discloses a multi-stage centrifugal extraction mechanism. A rotary motor is installed on the top surface of the extraction shell. The extraction shell contains, from top to bottom, an extraction chamber, a transfer chamber, and a mixing chamber. A stirring shaft is installed on the output shaft of the rotary motor, extending from the top surface of the extraction shell into the shell. Plate-shaped extraction blades and a stirring paddle are mounted on the stirring shaft. The plate-shaped extraction blades are located in the extraction chamber, and the stirring paddle is located in the mixing chamber. A light phase outlet pipe is installed on the top surface of the extraction shell, and a heavy phase outlet pipe is located on the upper side of the extraction shell. The heavy phase outlet pipe is connected to the heavy phase inlet of the next extraction shell via a pipe, and the light phase outlet pipe is connected to the light phase inlet of the next extraction shell via a pipe. In this utility model, the heavy and light phases enter the mixing chamber, are stirred by the stirring paddle, and then flow into the extraction chamber, improving the mixing effect and increasing the extraction efficiency. The plate-shaped extraction blades directly rotate the mixture within the extraction chamber, simplifying the structure of the centrifugal extractor.

Description

Technical Field

[0001] This utility model relates to the field of chemical product extraction technology, specifically a multi-stage centrifugal extraction mechanism. Background Technology

[0002] Extraction is a method that utilizes the difference in solubility or partition coefficient of a substance in two immiscible (or slightly soluble) solvents to transfer the solute from one solvent to the other. Through repeated extractions, most of the compound is extracted. Current multi-stage centrifugal extraction uses multiple centrifugal extractors connected in series. The light and heavy phases enter the centrifugal extractor and are mixed in a mixing zone to complete mass transfer. The mixture enters the rotating drum under the action of a turbine disk. The mixture rotates synchronously with the drum within the cavity formed by the web. Under the action of centrifugal force, the denser heavy phase gradually moves away from the center of the drum and towards the drum wall as it flows upwards, while the less dense light phase gradually moves away from the drum wall and towards the center. Current centrifugal extractors have relatively poor mixing effects between the aqueous and organic phases.

[0003] The relevant reference CN219440749U discloses a multi-stage extraction mechanism for extracting high-purity ammonium perrylate. Through the internal gear linkage of the transmission box, the inner and outer shafts rotate in opposite directions. Both the inner and outer shafts are equipped with stirring blades. By setting stirring blades in the mixing chamber of the centrifugal extractor, the light phase and heavy phase are mixed more evenly, thereby improving the extraction efficiency. However, a separate transmission box is required. The transmission box includes a housing and a drive gear. The drive gear is fixedly connected to the main shaft. Side gears are rotatably connected to both sides of the inner wall of the housing. The end of the drive gear away from the main shaft is fixedly connected to the inner shaft. The inner shaft is rotatably connected to the outer shaft through it. The structure is relatively complex. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a multi-stage centrifugal extraction mechanism with improved mixing effect and relatively simple structure.

[0005] To solve the above technical problems, this utility model provides a multi-stage centrifugal extraction mechanism, including an extraction shell, a rotary motor mounted on the top surface of the extraction shell, and an extraction chamber, a transfer chamber, and a mixing chamber arranged sequentially from top to bottom inside the extraction shell. A stirring shaft is mounted on the output shaft of the rotary motor, and the stirring shaft passes through the top surface of the extraction shell into the extraction shell. A plate-shaped extraction blade and a stirring paddle are mounted on the stirring shaft. The plate-shaped extraction blade is located in the extraction chamber, and the stirring paddle is located in the mixing chamber. A light phase outlet pipe is mounted on the top surface of the extraction shell, and a heavy phase outlet pipe is provided on the upper side of the extraction shell. The heavy phase outlet pipe is connected to the heavy phase inlet of the next extraction shell through a pipe, and the light phase outlet pipe is connected to the light phase inlet of the next extraction shell through a pipe.

[0006] By adopting the above technical solution, the heavy phase and the light phase enter the mixing chamber and are stirred by the stirring paddle before flowing into the extraction chamber, which improves the mixing effect and increases the extraction efficiency. In the extraction chamber, the plate-shaped extraction blades directly rotate the mixture, which simplifies the structure of the centrifugal extractor. The rotation of the plate-shaped extraction blades generates strong centrifugal force, which throws the heavy phase toward the outer wall of the extraction chamber and the light phase gathers toward the center of the extraction chamber. The centrifugal force enhances mass transfer and stratification, thereby improving the centrifugal stratification efficiency.

[0007] Preferably, the mixing chamber and the extraction chamber are connected by a transmission channel, which is located in the transmission chamber.

[0008] By adopting the above technical solution, after the heavy phase and the light phase are mixed in the mixing chamber, the mixture is made to flow into the extraction chamber by the fluid inertia.

[0009] Preferably, the transmission channel consists of a tapered section, a straight section, and a tapered section.

[0010] By adopting the above technical solution, the tapering section accelerates the mixed fluid, the straight section eliminates turbulent fluctuations, and the expanding section decelerates the fluid, thus avoiding uneven flow velocity when the liquid enters the extraction chamber and achieving good mixed fluid transmission effect.

[0011] Preferably, the contraction angle of the tapering section is 15°–20°, and its length is twice the diameter of the mixing chamber outlet.

[0012] By adopting the above technical solution, the contraction angle is 15°−20°, and the length of the tapering section is twice the diameter of the mixing chamber outlet, which is beneficial to accelerate the flow of the mixed fluid.

[0013] Preferably, the length of the straight segment is five times the diameter of the straight segment.

[0014] By adopting the above technical solution, the length of the straight section is five times the diameter, ensuring the elimination of turbulent fluctuations in the mixed fluid.

[0015] Preferably, the widening angle of the widening segment is 8°–10°, and its length is three times the diameter of the straight segment.

[0016] By adopting the above technical solution, a gradually expanding section with a gradually expanding angle of 8°−10° and a length three times the diameter of the straight section is used to avoid uneven flow velocity of the mixed fluid at the inlet of the extraction chamber.

[0017] Preferably, the agitator has a fragmentation hole.

[0018] By adopting the above technical solution, the degree of contact during the solution mixing process is increased.

[0019] Preferably, the plate-shaped extraction leaves are two symmetrical leaves.

[0020] By adopting the above technical solution, the plate-shaped extraction blades are symmetrically arranged, making cleaning convenient, while avoiding the huge centrifugal force generated by asymmetry and preventing violent vibration of the equipment.

[0021] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. In this invention, the heavy and light phases enter the mixing chamber and are stirred by the stirring paddle before flowing into the extraction chamber, which improves the mixing effect and increases the extraction efficiency. In the extraction chamber, the plate-shaped extraction blades directly rotate the mixture, simplifying the structure of the centrifugal extractor. The rotation of the plate-shaped extraction blades generates strong centrifugal force, which throws the heavy phase toward the outer wall of the extraction chamber and causes the light phase to gather toward the center of the extraction chamber. The centrifugal force enhances mass transfer and stratification, thereby improving the centrifugal stratification efficiency.

[0022] 2. The transmission channel of this utility model consists of a converging section, a straight section, and a expanding section. The converging section accelerates the mixed fluid, the straight section eliminates turbulence fluctuations, and the expanding section decelerates the flow, avoiding uneven flow velocity when the liquid enters the extraction chamber, resulting in good transmission effect of the mixed fluid.

[0023] 3. The plate-shaped extraction blades of this utility model are symmetrically arranged, which makes cleaning convenient and avoids the huge centrifugal force generated by asymmetry, thus avoiding violent vibration of the equipment. Attached Figure Description

[0024] Figure 1 This is a perspective view of the present utility model; Figure 2 This is a cross-sectional schematic diagram of the extraction shell of this utility model; Figure 3 This is a schematic diagram of the extraction chamber of this utility model; Figure 4 This is a schematic diagram of the transmission cavity of this utility model; Figure 5 This is a schematic diagram of the mixing chamber of this utility model.

[0025] Drawing numbers: 1. Extraction shell, 2. Rotary motor, 3. Stirring shaft, 4. Plate-shaped extraction blades, 5. Stirring paddle, 6. Extraction chamber, 7. Transfer chamber, 8. Mixing chamber, 9. Light phase outlet pipe, 10. Heavy phase outlet pipe, 11. Transfer channel, 12. Converging section, 13. Straight section, 14. Diverging section, 15. Fragmentation hole, 16. Light phase inlet, 17. Heavy phase inlet, 18. Light phase outlet bend. Detailed Implementation

[0026] like Figure 1-2 As shown, the multi-stage centrifugal extraction mechanism includes an extraction housing 1, with a rotary motor 2 mounted on the top surface of the extraction housing 1. Inside the extraction housing 1, from top to bottom, are sequentially arranged an extraction chamber 6, a transfer chamber 7, and a mixing chamber 8. A stirring shaft 3 is mounted on the output shaft of the rotary motor 2, extending from the top surface of the extraction housing 1 into the housing. Plate-shaped extraction blades 4 and a stirring paddle 5 are mounted on the stirring shaft 3. Figure 3As shown, two symmetrical plate-shaped extraction blades 4 are located in the extraction chamber 6, facilitating cleaning and avoiding the generation of huge centrifugal forces due to asymmetry, thus preventing severe equipment vibration. The extraction chamber 6 has a light phase outlet bend 18, with its inlet located near the center of the inner top surface of the extraction chamber 6. The outlet of the light phase outlet pipe 18 is connected to the light phase outlet pipe 9. The stirring paddle 5 is located in the mixing chamber 8. The light phase outlet pipe 9 is installed on the top surface of the extraction shell 1, and a heavy phase outlet pipe 10 is installed on the upper side of the extraction shell 1. The heavy phase outlet pipe 10 is connected to the heavy phase inlet of the next extraction shell 1 via a pipe, and the light phase outlet pipe 9 is connected to the light phase inlet of the next extraction shell 1 via a pipe.

[0027] like Figure 4 As shown, the mixing chamber 8 and the extraction chamber 6 are connected by a transmission channel 11, which is located in the transmission chamber 7. The fluid inertia causes the mixed liquid to flow into the extraction chamber 6. The transmission channel 11 consists of a converging section 12, a straight section 13, and a expanding section 14. The converging section 12 accelerates the mixed fluid, the straight section 13 eliminates turbulence fluctuations, and the expanding section 14 decelerates the flow, preventing uneven flow velocity when the liquid enters the extraction chamber 6, resulting in good mixed fluid transmission.

[0028] The contraction angle of the tapering section 12 is 15°–20°, and its length is twice the outlet diameter of the mixing chamber 8, accelerating the flow of the mixed fluid. The length of the straight section 13 is five times its diameter, ensuring the elimination of turbulent fluctuations in the mixed fluid. The expansion angle of the expanding section 14 is 8°–10°, and its length is three times the diameter of the straight section 13, avoiding uneven flow velocity of the mixed fluid at the inlet of the extraction chamber 6.

[0029] like Figure 5 As shown, the stirring paddle 5 has a fragmentation hole 15 to increase the contact degree during the solution mixing process.

[0030] In operation, the light phase enters the mixing chamber 8 through the light phase inlet 16, and the heavy phase enters the mixing chamber 8 through the heavy phase inlet 17. The two phases are stirred and mixed by the stirring paddle 5 with the fragmentation holes 15. After mixing, the liquid flows into the extraction chamber 6 through the transfer channel 11. The plate-shaped extraction blades 4 rotate the mixture, generating a strong centrifugal force. The heavy phase is thrown against the outer wall of the extraction chamber 6 and enters the heavy phase inlet 17 of the next centrifugal extractor through the heavy phase outlet pipe 10. The light phase gathers towards the center of the extraction chamber 6 and enters the light phase inlet 16 of the next centrifugal extractor through the light phase outlet pipe 9. Finally, the liquid is discharged from the last centrifugal extractor. The heavy and light phases enter the mixing chamber 8 and are stirred by the stirring paddle 5 before flowing into the extraction chamber 6, which improves the mixing effect and increases the extraction efficiency. In the extraction chamber 6, the plate-shaped extraction blades 4 directly rotate the mixture, which simplifies the structure of the centrifugal extractor. The rotation of the plate-shaped extraction blades 4 generates strong centrifugal force, which throws the heavy phase toward the outer wall of the extraction chamber 6 and the light phase gathers toward the center of the extraction chamber 6. The centrifugal force enhances mass transfer and stratification, thereby improving the centrifugal stratification efficiency.

[0031] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments. Without departing from the stated principles, the implementation of the present invention may have any variations or modifications.

Claims

1. A multi-stage centrifugal extraction mechanism, comprising an extraction housing (1), a rotating motor (2) is installed on the top surface of the extraction housing (1), characterized in that: The extraction housing (1) is provided with an extraction chamber (6), a transfer chamber (7) and a mixing chamber (8) from top to bottom. A stirring shaft (3) is installed on the output shaft of the rotary motor (2). The stirring shaft (3) passes through the top surface of the extraction housing (1) and enters the extraction housing (1). A plate-shaped extraction blade (4) and a stirring paddle (5) are installed on the stirring shaft (3). The plate-shaped extraction blade (4) is located in the extraction chamber (6) and the stirring paddle (5) is located in the mixing chamber (8). A light phase outlet pipe (9) is installed on the top surface of the extraction housing (1) and a heavy phase outlet pipe (10) is provided on the upper side of the extraction housing (1). The heavy phase outlet pipe (10) is connected to the heavy phase inlet (17) on the next extraction housing (1) through a pipe, and the light phase outlet pipe (9) is connected to the light phase inlet (16) on the next extraction housing (1) through a pipe.

2. The multistage centrifugal extraction mechanism according to claim 1, characterized in that: The mixing chamber (8) and the extraction chamber (6) are connected by a transmission channel (11), which is located in the transmission chamber (7).

3. A multistage centrifugal extraction mechanism according to claim 2, characterised in that: The transmission channel (11) consists of a tapered section (12), a straight section (13), and a widening section (14).

4. The multi-stage centrifugal extraction mechanism according to claim 3, characterized in that: The contraction angle of the tapering section (12) is 15°−20°, and its length is twice the outlet diameter of the mixing chamber (8).

5. The multi-stage centrifugal extraction mechanism according to claim 3, characterized in that: The length of the straight segment (13) is five times the diameter of the straight segment (13).

6. The multi-stage centrifugal extraction mechanism according to claim 3, characterized in that: The widening angle of the widening segment (14) is 8°−10°, and its length is three times the diameter of the straight segment (13).

7. The multi-stage centrifugal extraction mechanism according to claim 1, characterized in that: The agitator (5) has a fragmentation hole (15).

8. The multi-stage centrifugal extraction mechanism according to claim 1, characterized in that: The plate-shaped extraction leaves (4) are two symmetrical leaves.

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