Extractive distillation tower

Abstract

The utility model discloses an extractive distillation tower, which belongs to the technical field of extractive distillation towers, and comprises a distillation tower main body, the top of the distillation tower main body is provided with a circulating mechanism, the outer wall of the distillation tower main body is respectively communicated with a feed pipe and a gas inlet pipe, and the top of the distillation tower main body is communicated with a distillation pipe; according to the petroleum rectification device, petroleum can be dispersed by arranging the circulating mechanism and the filtering holes in the filtering plate, so that heating steam can be in full contact with the petroleum to enable the petroleum to be uniformly heated, the rectification effect is improved, the gasoline can be rapidly extracted from the petroleum, the rectification efficiency is improved, and the production cost is reduced. And the auger rotates to convey petroleum at the bottom of the rectifying tower body to the top of the rectifying tower body, and the petroleum falls onto the filter plate from the first through groove to be dispersed again, so that the petroleum which is not fully rectified at the bottom of the rectifying tower body can be rectified again, full rectification of all the petroleum is ensured, and the rectification effect is further improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of extractive distillation columns, and particularly relates to an extractive distillation column. Background Art

[0002] An extractive distillation column is an important chemical device used to efficiently separate the components of a mixture. It separates by adding an extractant to the feed liquid to change the relative volatility between the original components. Gasoline production often requires the use of an extractive distillation column to rectify petroleum. After the crude petroleum is mixed with the extractant in the extractive distillation column, different boiling point petroleum products can be obtained through heating.

[0003] The extractive distillation column heats the petroleum through steam. However, the heating steam of the existing extractive distillation column cannot fully contact with the petroleum, resulting in poor heating effect, so that the petroleum cannot be fully heated, thus making the heating of the petroleum uneven, and further affecting the rectification effect of the petroleum. In addition, the reaction between the extractant and the petroleum in the existing extractive distillation column is slow, which will affect the rectification efficiency. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an extractive distillation column to solve the problems in the prior art that the heating steam of the existing extractive distillation column cannot fully contact with the petroleum, resulting in poor heating effect, so that the petroleum cannot be fully heated, thus making the heating of the petroleum uneven, and further affecting the rectification effect of the petroleum, and the reaction between the extractant and the petroleum in the existing extractive distillation column is slow, which will affect the rectification efficiency.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] An extractive distillation column, comprising a main rectification tower body. A circulation mechanism is arranged at the top of the main rectification tower body. A feed pipe and an air inlet pipe are respectively communicated with the outer wall of the main rectification tower body. A distillate pipe is communicated with the top of the main rectification tower body. A discharge pipe is communicated with the bottom of the main rectification tower body. A fixing ring is connected to the outer wall of the main rectification tower body. A plurality of support legs are connected to the bottom of the fixing ring;

[0007] The circulation mechanism comprises a fixing frame and a plurality of filter plates. The outer wall of the filter plate is connected with the inner wall of the main rectification tower body. One side of the fixing frame is connected with the top of the main rectification tower body. A motor is connected to the top of the fixing frame. The output shaft of the motor penetrates through the top of the fixing frame and is connected with a second bevel gear. The other side of the second bevel gear is connected with a rotating rod. The other end of the rotating rod extends into the main rectification tower body. An auger is connected to the outer wall of the rotating rod. A bevel gear ring is attached to the outer wall of the rotating rod. One side of the bevel gear ring is connected with a rotating cylinder. One side of the rotating cylinder extends into the main rectification tower body. The inner wall of the rotating cylinder is attached to the outer wall of the auger. A plurality of first through grooves are formed in the rotating cylinder.

[0008] As a further description of the above technical solution:

[0009] A third through groove is provided at the top of the main body of the rectifying column, and the inner wall of the third through groove is rotatably connected to the outer wall of the rotating cylinder.

[0010] As a further description of the above technical solution:

[0011] A second through groove is provided in the filter plate, and the inner wall of the second through groove is rotatably connected to the outer wall of the rotating cylinder.

[0012] As a further description of the above technical solution:

[0013] One side of the fixing frame is rotatably connected with a rotating block, and the other side of the rotating block is connected with a first bevel gear.

[0014] As a further description of the above technical solution:

[0015] One side of the first bevel gear is meshed with one side of the second bevel gear, and the other side of the first bevel gear is meshed with one side of the bevel gear ring.

[0016] As a further description of the above technical solution:

[0017] A plurality of stirring blades are connected to the outer wall of the rotating cylinder, and the plurality of stirring blades are symmetrically distributed on both sides of the rotating cylinder.

[0018] In summary, due to the adoption of the above technical solution, the beneficial effects of the present utility model are as follows:

[0019] 1. In the present utility model, by setting a circulation mechanism, the filter holes on the filter plate can disperse the petroleum, enabling the heating steam to fully contact the petroleum and heat the petroleum evenly, thereby improving the rectification effect, and enabling gasoline to be quickly extracted from the petroleum, improving the rectification efficiency. The rotation of the output shaft of the motor drives the second bevel gear, the rotating rod and the auger to rotate, so as to convey the petroleum at the bottom of the main body of the rectifying column to the top of the main body of the rectifying column, and fall from the first through groove onto the filter plate to be dispersed again, and then the petroleum that has not been fully rectified at the bottom of the main body of the rectifying column can be rectified again to ensure that all the petroleum can be fully rectified, further improving the rectification effect.

[0020] 2. In the present utility model, by providing a circulation mechanism, when the output shaft of the motor drives the second bevel gear to rotate, the second bevel gear can drive the first bevel gear and the bevel gear ring to rotate, and can drive a plurality of stirring blades through the rotating cylinder to stir the petroleum at the bottom of the main body of the rectification column, thereby promoting the reaction between the extractant and the petroleum, reducing the reaction time between the extractant and the petroleum, improving the rectification efficiency, and the stirring of the petroleum by the stirring blades can also accelerate the heat transfer between the petroleum, thereby preventing local overheating and causing bumping phenomena, ensuring the stable progress of the distillation process. Brief Description of the Drawings

[0021] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0022] Figure 2 is a sectional structural schematic diagram of the main body of the rectification column of the present utility model;

[0023] Figure 3 is an exploded structural schematic diagram of the first bevel gear of the present utility model.

[0024] Legend: 1. Main body of the rectification column; 2. Fixed ring; 3. Support leg; 4. Circulation mechanism; 401. Motor; 402. Fixed frame; 403. First bevel gear; 404. Second bevel gear; 405. Rotating rod; 406. Bevel gear ring; 407. First through groove; 408. Rotating cylinder; 409. Filter plate; 410. Second through groove; 411. Stirring blade; 412. Rotating block; 413. Auger; 5. Distillate pipe; 6. Feed pipe; 7. Inlet pipe; 8. Discharge pipe; 9. Third through groove. Detailed Embodiment

[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present utility model.

[0026] Please refer to Figures 1-3 , the present utility model provides a technical solution: an extractive distillation column, including a main body 1 of the rectification column, a circulation mechanism 4 is arranged at the top of the main body 1 of the rectification column, a feed pipe 6 and an inlet pipe 7 are respectively communicated with the outer wall of the main body 1 of the rectification column, a distillate pipe 5 is communicated with the top of the main body 1 of the rectification column, a discharge pipe 8 is communicated with the bottom of the main body 1 of the rectification column, a fixed ring 2 is connected to the outer wall of the main body 1 of the rectification column, and a plurality of support legs 3 are connected to the bottom of the fixed ring 2;

[0027] The circulation mechanism 4 includes a fixed frame 402 and a plurality of filter plates 409. The outer wall of the filter plate 409 is connected to the inner wall of the rectification tower main body 1. One side of the fixed frame 402 is connected to the top of the rectification tower main body 1. A motor 401 is connected to the top of the fixed frame 402. The output shaft of the motor 401 penetrates through the top of the fixed frame 402 and is connected to a second bevel gear 404. The other side of the second bevel gear 404 is connected to a rotating rod 405. The other end of the rotating rod 405 extends into the rectification tower main body 1. A screw conveyor 413 is connected to the outer wall of the rotating rod 405. A bevel gear ring 406 is attached to the outer wall of the rotating rod 405. One side of the bevel gear ring 406 is connected to a rotating cylinder 408. One side of the rotating cylinder 408 extends into the rectification tower main body 1. The inner wall of the rotating cylinder 408 is in contact with the outer wall of the screw conveyor 413. A plurality of first through grooves 407 are formed in the rotating cylinder 408. A third through groove 9 is formed in the top of the rectification tower main body 1. The inner wall of the third through groove 9 is rotatably connected to the outer wall of the rotating cylinder 408. A second through groove 410 is formed in the filter plate 409. The inner wall of the second through groove 410 is rotatably connected to the outer wall of the rotating cylinder 408.

[0028] The specific implementation method is as follows: By setting the circulation mechanism 4, the petroleum entering from the feed pipe 6 can be dispersed by the filter holes on the filter plate 409, so that it can fully contact the heating steam, making the petroleum evenly heated, thereby improving the rectification effect, and enabling gasoline to be quickly extracted from the petroleum, improving the rectification efficiency. The rotation of the output shaft of the motor 401 drives the second bevel gear 404 and the rotating rod 405 to rotate. The rotation of the rotating rod 405 drives the screw conveyor 413 to rotate, so that the petroleum at the bottom of the rectification tower main body 1 can be transported to the top of the rectification tower main body 1 and fall onto the filter plate 409 from the first through groove 407 to be dispersed again, thereby enabling the petroleum that has not been fully rectified at the bottom of the rectification tower main body 1 to be rectified again, ensuring that all the petroleum can be fully rectified and further improving the rectification effect.

[0029] A rotating block 412 is rotatably connected to one side of the fixed frame 402. The other side of the rotating block 412 is connected to a first bevel gear 403. One side of the first bevel gear 403 is meshed with one side of the second bevel gear 404. The other side of the first bevel gear 403 is meshed with one side of the bevel gear ring 406. A plurality of stirring blades 411 are connected to the outer wall of the rotating cylinder 408, and the plurality of stirring blades 411 are symmetrically distributed on both sides of the rotating cylinder 408.

[0030] The specific implementation method is as follows: By setting up the circulation mechanism 4, when the output shaft of the motor 401 drives the second bevel gear 404 to rotate, the second bevel gear 404 can drive the first bevel gear 403 to rotate. The rotation of the first bevel gear 403 drives the bevel gear ring 406 to rotate, the rotation of the bevel gear ring 406 drives the rotating cylinder 408 to rotate, and the rotation of the rotating cylinder 408 drives the plurality of stirring blades 411 to rotate, so that the plurality of stirring blades 411 can stir the petroleum at the bottom of the main body 1 of the rectification tower, thereby promoting the reaction between the extractant and the petroleum, reducing the reaction time between the extractant and the petroleum, improving the rectification efficiency, and the stirring of the petroleum by the stirring blades 411 can also accelerate the heat transfer between the petroleum, thereby preventing local overheating and causing a boiling phenomenon, ensuring the stable progress of the distillation process.

[0031] Working principle: During use, the petroleum and the extractant are transported into the main body 1 of the rectification tower through the feed pipe 6. At the same time, the heating steam is transported into the main body 1 of the rectification tower through the inlet pipe 7. Then the petroleum will be dispersed by the filter holes on the filter plate 409, so as to be able to fully contact the heating steam. The petroleum after contact will generate gasoline vapor. The generated gasoline vapor will enter the condenser from the distillate pipe 5 and be collected after condensation, while the petroleum that has not been fully rectified will fall to the bottom of the main body 1 of the rectification tower. At this time, the motor 401 is started. The output shaft of the motor 401 rotates to drive the second bevel gear 404 to rotate. The rotation of the second bevel gear 404 drives the first bevel gear 403 to rotate. The rotation of the first bevel gear 403 drives the bevel gear ring 406 and the rotating cylinder 408 to rotate, and drives the plurality of stirring blades 411 to stir the petroleum at the bottom of the main body 1 of the rectification tower, thereby promoting the reaction between the extractant and the petroleum, and accelerating the heat transfer between the petroleum, preventing local overheating and causing a boiling phenomenon. While the second bevel gear 404 rotates, it can drive the auger 413 to rotate through the rotating rod 405, so as to transport the petroleum at the bottom of the main body 1 of the rectification tower to the top of the main body 1 of the rectification tower and fall into the filter plate 409 from the first through groove 407 to be dispersed again, so as to rectify the petroleum that has not been fully rectified at the bottom of the main body 1 of the rectification tower again. After that, all the fully rectified petroleum waste liquid can flow out from the discharge pipe 8.

[0032] The above is only the preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and the inventive concept of the present invention, makes equivalent replacements or changes, and should be covered within the protection scope of the present invention.

Claims

1. Extractive distillation column, comprising a main body of the distillation column (1), characterized in that: A circulation mechanism (4) is provided at the top of the main rectifying tower body (1). The outer wall of the main rectifying tower body (1) is respectively communicated with a feed pipe (6) and an air inlet pipe (7). The top of the main rectifying tower body (1) is communicated with a distillate pipe (5). The bottom of the main rectifying tower body (1) is communicated with a discharge pipe (8). The outer wall of the main rectifying tower body (1) is connected with a fixing ring (2), and a plurality of support legs (3) are connected to the bottom of the fixing ring (2). The circulation mechanism (4) includes a fixing frame (402) and a plurality of filter plates (409). The outer wall of the filter plate (409) is connected to the inner wall of the main rectifying tower body (1). One side of the fixing frame (402) is connected to the top of the main rectifying tower body (1). A motor (401) is connected to the top of the fixing frame (402). The output shaft of the motor (401) penetrates through the top of the fixing frame (402) and is connected to a second bevel gear (404). The other side of the second bevel gear (404) is connected to a rotating rod (405). The other end of the rotating rod (405) extends into the main rectifying tower body (1). An auger (413) is connected to the outer wall of the rotating rod (405). A bevel gear ring (406) is attached to the outer wall of the rotating rod (405). One side of the bevel gear ring (406) is connected to a rotating cylinder (408). One side of the rotating cylinder (408) extends into the main rectifying tower body (1). The inner wall of the rotating cylinder (408) is in contact with the outer wall of the auger (413). A plurality of first through grooves (407) are formed in the rotating cylinder (408).

2. The extractive distillation column according to claim 1, wherein: A third through groove (9) is formed at the top of the main rectifying tower body (1). The inner wall of the third through groove (9) is rotatably connected to the outer wall of the rotating cylinder (408).

3. The extractive distillation column according to claim 1, wherein: A second through groove (410) is formed in the filter plate (409). The inner wall of the second through groove (410) is rotatably connected to the outer wall of the rotating cylinder (408).

4. The extractive distillation column according to claim 1, wherein: A rotating block (412) is rotatably connected to one side of the fixing frame (402). A first bevel gear (403) is connected to the other side of the rotating block (412).

5. The extractive distillation column according to claim 4, wherein: One side of the first bevel gear (403) is meshed with one side of the second bevel gear (404). The other side of the first bevel gear (403) is meshed with one side of the bevel gear ring (406).

6. The extractive distillation column according to claim 1, wherein: A plurality of stirring blades (411) are connected to the outer wall of the rotating cylinder (408), and the plurality of stirring blades (411) are symmetrically distributed on both sides of the rotating cylinder (408).

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