Separation structure of extraction and fractionation kettle

Abstract

The utility model provides an extraction layered kettle's separation structure belongs to the extraction layered kettle technical field. It solved the problem of lower separation efficiency of existing extraction layered kettle. The layered kettle includes kettle body and the stirring shaft who wears in the kettle body, the bottom of stirring shaft is fixedly connected with the stirring vane, the separation structure includes the separation pipe, the lifting cylinder who is fixed on the stirring shaft and the separation box who sets in the outside of the top of lifting cylinder, has the clearance between lifting cylinder and separation box, the upper portion in the kettle body is located to the lifting cylinder, the centre of the bottom of lifting cylinder has the liquid inlet, the circumferential edge of top has the liquid outlet, the rotation of stirring shaft drive lifting cylinder can make the medium in the kettle body through the liquid inlet into the lifting cylinder and then through the liquid outlet and flow to the separation box, the inner end of separation pipe is linked with the bottom of separation box, and the outer end is worn to the outside of kettle body. The separation structure of the utility model has the advantages of improving the separation efficiency of medium and being applicable to the modern chemical continuous flow process.

Description

Technical Field

[0001] This utility model belongs to the field of extraction separation vessel technology, and relates to the separation structure of extraction separation vessel. Background Technology

[0002] An extraction separation vessel is a chemical equipment used for liquid-liquid extraction and separation. It achieves separation by the difference in solubility of substances in immiscible solvents, and ultimately achieves two-phase separation by density difference.

[0003] Existing extraction separation vessels, such as the extraction separation vessel for synthesizing cyclopropionic acid disclosed in Chinese patent literature [Patent Application No.: 201720901405.1; Publication No.: CN206995927U], include a vessel body and a controller. The vessel body is equipped with a stirring mechanism and a first density sensor. The first density sensor and the stirring mechanism are electrically connected to the controller. The top of the vessel body is equipped with a sealing cover, which is equipped with a feed inlet and a vent valve. The bottom of the vessel body is equipped with a discharge pipe, which is equipped with a sight glass and a first valve. The first valve is located at the lower end of the sight glass.

[0004] This type of extraction stratification vessel uses a stirring mechanism to agitate the medium, accelerating its flow. The lighter, less dense medium rises under the stirring, while the denser, heavier medium sinks, thus accelerating separation to some extent. However, after a period of stirring, the stirring mechanism needs to be shut off. Once the medium stabilizes and the density sensor detects no further change in density, the first valve is opened to begin discharging. This means that separation still requires waiting for the heavy and light media to completely separate. Furthermore, only one reactor can be separated at a time. After separation, the medium in the reactor is emptied, and the medium to be separated is injected back into the reactor, repeating the process. This intermittent separation process results in low separation efficiency. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned problems in the existing technology by proposing a separation structure for an extraction layering vessel. The technical problem solved is how to improve the separation efficiency of the medium, making it suitable for modern chemical continuous flow processes.

[0006] The objective of this utility model can be achieved through the following technical solution: a separation structure for an extraction layering vessel, the layering vessel including a vessel body and a stirring shaft passing through the vessel body, the bottom of the stirring shaft being fixedly connected to a stirring blade, characterized in that the separation structure includes a separation tube, a lifting cylinder fixedly connected to the stirring shaft, and a separation box sleeved outside the top of the lifting cylinder, a gap between the lifting cylinder and the separation box, the lifting cylinder being located in the upper part of the vessel body, the center of the bottom of the lifting cylinder having a liquid inlet, and the circumferential edge of the top having a liquid outlet, the stirring shaft driving the lifting cylinder to rotate so that the medium in the vessel body enters the lifting cylinder through the liquid inlet and then flows to the separation box through the liquid outlet, the inner end of the separation tube being connected to the bottom of the separation box, and the outer end extending out of the vessel body.

[0007] During operation, the stirring shaft drives the stirring blades to rotate, agitating the medium and increasing its flow velocity. This causes lighter media to rise faster and heavier media to fall faster. Simultaneously, the rotation of the stirring shaft and blades also drives the lifting cylinder to rotate. The medium at the top enters the lifting cylinder through the inlet. The rotation of the lifting cylinder generates centrifugal force, causing the lighter media to rise and be thrown towards the separation box through the outlet, then discharged through the separation pipe. The lifting cylinder, however, cannot allow the heavier media to rise, so it flows out through the inlet and returns to the reactor. This separation structure can separate the light and heavy media without requiring complete stratification, improving separation efficiency. Furthermore, it allows for simultaneous separation and injection of the medium to be separated, making it suitable for modern continuous flow chemical processes. Separation can be achieved without shutting down the reactor, further enhancing separation efficiency.

[0008] In the separation structure of the extraction stratification vessel described above, the lifting cylinder includes a cylinder body, several baffles fixedly connected at equal intervals to the inner side wall of the cylinder body, and a connecting pipe located at the center of the cylinder body. The top and bottom of each baffle are fixedly connected to the connecting pipe, and the remaining portion of each baffle has a certain distance from the connecting pipe. The connecting pipe is sleeved and fixedly connected to the stirring shaft. The baffles allow for better separation of light and heavy media, enabling the light media to rise more effectively and ensuring that the heavy media can only flow back into the vessel body through the inlet. The connecting pipe facilitates the connection between the lifting cylinder and the stirring shaft.

[0009] In the separation structure of the extraction layering vessel described above, the lifting cylinder further includes a top cover and several spacers. The inner ring of the top cover is fixedly connected to the connecting pipe, and the outer ring of the top cover is separated from the cylinder body by the spacers arranged at equal intervals to form the liquid outlet. The top cover is inclined downwards from the inside out, and the cylinder body and the top cover are fixedly connected by fasteners inserted through the cylinder body, the spacers, and the top cover. This structure makes the liquid outlet easy to form and makes the liquid outlet shape reasonable, allowing the light medium thrown out of the liquid outlet to flow obliquely downwards in all directions, so that the light medium can flow better to the separation box and improve the separation efficiency.

[0010] In the separation structure of the extraction layering vessel described above, the liquid inlet is located at the center of the bottom of the cylinder. This efficient use of space allows the medium to enter the lifting cylinder more effectively.

[0011] In the separation structure of the extraction layering vessel described above, the liquid inlet is located at the middle of the vessel body in the vertical direction. This is adapted to the liquid level of the medium inside the vessel, allowing the medium to enter the lifting cylinder more effectively.

[0012] In the separation structure of the extraction and stratification vessel described above, the bottom of the cylinder is constricted. This allows the lifting cylinder to generate centrifugal force more effectively, enabling the lighter medium to move upwards more efficiently.

[0013] In the separation structure of the extraction layering vessel described above, the separation box includes an annular outer wall, an annular inner wall, and an annular bottom wall. The top of the outer wall is located above the liquid outlet, and the top of the inner wall is located below the liquid outlet. There is a certain gap between the top of the inner wall and the outer wall. The bottom of the outer wall and the bottom of the inner wall are connected by the bottom wall. This structure allows the separation box to better collect the light medium ejected by the lifting cylinder, preventing the light medium ejected by the lifting cylinder from flowing back into the vessel body, thus improving separation efficiency.

[0014] In the separation structure of the extraction stratification vessel described above, the top of the outer wall of the separation box extends to the inner side wall of the top of the vessel body. This structure prevents the light medium ejected by the lifting cylinder from flowing back into the vessel body, thus improving separation efficiency.

[0015] Compared with the prior art, the separation structure of the extraction layering vessel provided by this utility model has the following advantages:

[0016] 1. This separation structure can separate light and heavy media without completely separating them, improving the separation efficiency. It can also inject the media to be separated while separating, making it suitable for modern continuous flow chemical processes. It can achieve separation without stopping the machine, thus improving the separation efficiency.

[0017] 2. The lifting cylinder of this separation structure is equipped with baffles. The baffles can better separate the light and heavy media, allowing the light media to rise more easily and the heavy media to flow back into the reactor through the inlet, thereby improving the separation efficiency of the media. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the extraction layering vessel.

[0019] Figure 2 This is a schematic diagram of the overall structure of this separate structure.

[0020] In the diagram, 1 is the vessel body; 2 is the stirring shaft; 3 is the stirring blade; 4 is the separation tube; 5 is the lifting cylinder; 51 is the liquid inlet; 52 is the liquid outlet; 53 is the cylinder body; 54 is the baffle; 55 is the connecting pipe; 56 is the top cover; 57 is the partition sleeve; 6 is the separation box; 61 is the outer wall; 62 is the inner wall; and 63 is the bottom wall. Detailed Implementation

[0021] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0022] like Figure 1 As shown, the extraction layering vessel includes a vessel body 1, a stirring shaft 2, stirring blades 3, and a separation structure, which includes a separation tube 4, a lifting cylinder 5, and a separation box 6.

[0023] The stirring shaft 2 is inserted into the vessel body 1, the stirring blade 3 is fixed to the bottom of the stirring shaft 2, the lifting cylinder 5 is fixed to the stirring shaft 2, the separation box 6 is sleeved on the top of the lifting cylinder 5, there is a gap between the lifting cylinder 5 and the separation box 6, and the lifting cylinder 5 is located in the upper part of the vessel body 1.

[0024] like Figure 2 As shown, the lifting cylinder 5 includes a cylinder body 53, a baffle 54, a connecting pipe 55, a top cover 56, and a spacer 57. In this embodiment, there are four baffles 54 and four spacers 57. In actual production, there can be three or six baffles 54 and three or six spacers 57.

[0025] Four baffles 54 are fixedly connected to the inner wall of the cylinder 53 at equal intervals. The top and bottom of each baffle 54 are fixedly connected to the connecting pipe 55, and the remaining part of each baffle 54 is spaced apart from the connecting pipe 55. The connecting pipe 55 is located at the center of the cylinder 53 and is sleeved and fixedly connected to the stirring shaft 2. The bottom of the cylinder 53 is constricted, and there is a liquid inlet 51 at the center of the bottom of the cylinder 53. The liquid inlet 51 is located at the middle of the vertical direction of the vessel 1. The inner ring of the top cover 56 is fixedly connected to the connecting pipe 55, and the outer ring of the top cover 56 is separated from the cylinder 53 by spacers 57 at equal intervals to form a liquid outlet 52, so that there is a liquid outlet 52 at the circumferential edge of the top of the lifting cylinder 5. The top cover 56 is inclined downward from the inside to the outside. The cylinder 53 and the top cover 56 are fixedly connected by fasteners such as bolts through the cylinder 53, spacers 57 and the top cover 56.

[0026] The separation box 6 includes an annular outer wall 61, an annular inner wall 62, and an annular bottom wall 63. The top of the outer wall 61 is located above the liquid outlet 52, and the top of the inner wall 62 is located below the liquid outlet 52. There is a certain gap between the top of the inner wall 62 and the outer wall 61. The bottom of the outer wall 61 and the bottom of the inner wall 62 are connected by the bottom wall 63. The top of the outer wall 61 of the separation box 6 extends to the inner side wall of the top of the vessel body 1. The inner end of the separation tube 4 is connected to the bottom of the separation box 6, and the outer end extends out of the vessel body 1.

[0027] During operation, the stirring shaft 2 drives the stirring blades 3 and the lifting cylinder 5 to rotate simultaneously. The stirring blades 3 agitate the medium, increasing its flow speed, causing the lighter medium to rise faster and the heavier medium to fall faster. The medium at the top enters the lifting cylinder 5 through the inlet 51. The rotation of the lifting cylinder 5 generates centrifugal force, causing the lighter medium to rise and be thrown towards the separation box 6 through the outlet 52, and then discharged through the separation pipe 4. The lifting cylinder 5 cannot allow the heavier medium to rise, so the heavier medium flows out through the inlet 51 and flows back into the vessel body 1. The heavier medium can be discharged through the outlet at the bottom of the vessel body 1. The amount of medium separated can be injected into the vessel body 1, allowing this extraction stratification vessel to be installed in a continuous flow process production line.

[0028] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0029] Although this document frequently uses terms such as vessel body 1, stirring shaft 2, stirring blade 3, separation tube 4, lifting cylinder 5, liquid inlet 51, liquid outlet 52, cylinder body 53, baffle 54, connecting pipe 55, top cover 56, spacer 57, separation box 6, outer wall 61, inner wall 62, and bottom wall 63, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A separation structure for an extraction layering vessel, the layering vessel comprising a vessel body (1) and a stirring shaft (2) passing through the vessel body (1), wherein a stirring blade (3) is fixedly connected to the bottom of the stirring shaft (2), characterized in that, The separation structure includes a separation tube (4), a lifting cylinder (5) fixed to the stirring shaft (2), and a separation box (6) sleeved on the top of the lifting cylinder (5). There is a gap between the lifting cylinder (5) and the separation box (6). The lifting cylinder (5) is located in the upper part of the vessel body (1). The center of the bottom of the lifting cylinder (5) has a liquid inlet (51), and the circumferential edge of the top has a liquid outlet (52). The stirring shaft (2) drives the lifting cylinder (5) to rotate, so that the medium in the vessel body (1) enters the lifting cylinder (5) through the liquid inlet (51) and flows to the separation box (6) through the liquid outlet (52). The inner end of the separation tube (4) is connected to the bottom of the separation box (6), and the outer end extends out of the vessel body (1).

2. The separation structure of the extraction layering vessel according to claim 1, characterized in that, The lifting cylinder (5) includes a cylinder (53), several baffles (54) fixedly connected at equal intervals to the inner sidewall of the cylinder (53), and a connecting pipe (55) located at the center of the cylinder (53). The top and bottom of each baffle (54) are fixedly connected to the connecting pipe (55), and the remaining part of each baffle (54) has a certain distance from the connecting pipe (55). The connecting pipe (55) is sleeved and fixedly connected to the stirring shaft (2).

3. The separation structure of the extraction layering vessel according to claim 2, characterized in that, The lifting cylinder (5) also includes a top cover (56) and several spacers (57). The inner ring of the top cover (56) is fixedly connected to the connecting pipe (55). The outer ring of the top cover (56) is separated from the cylinder (53) by the spacers (57) arranged at equal intervals to form the liquid outlet (52). The top cover (56) is inclined downward from the inside to the outside. The cylinder (53) and the top cover (56) are fixedly connected by fasteners inserted in the cylinder (53), the spacers (57) and the top cover (56).

4. The separation structure of the extraction layering vessel according to claim 2 or 3, characterized in that, The liquid inlet (51) is located at the center of the bottom of the cylinder (53).

5. The separation structure of the extraction layering vessel according to claim 1, 2, or 3, characterized in that, The liquid inlet (51) is located at the middle of the vertical direction of the vessel body (1).

6. The separation structure of the extraction layering vessel according to claim 2 or 3, characterized in that, The bottom of the cylinder (53) is constricted.

7. The separation structure of the extraction layering vessel according to claim 1, 2, or 3, characterized in that, The separation box (6) includes an annular outer wall (61), an annular inner wall (62), and an annular bottom wall (63). The top of the outer wall (61) is located above the liquid outlet (52), and the top of the inner wall (62) is located below the liquid outlet (52). There is a certain gap between the top of the inner wall (62) and the outer wall (61). The bottom of the outer wall (61) and the bottom of the inner wall (62) are connected by the bottom wall (63).

8. The separation structure of the extraction layering vessel according to claim 7, characterized in that, The top of the outer wall (61) of the separation box (6) extends to the inner side wall of the top of the vessel body (1).

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