Distillation tower with stirring function

Abstract

The utility model relates to the technical field of distillation tower equipment, in particular to a distillation tower with a stirring function. Comprising a hollow tower body, tower trays are arranged on the inner wall of the tower body in an up-down staggered mode, the tower trays are arranged in a downward inclined mode, one side of each tower tray is fixed to the inner wall of the tower body, a gap exists between the other side of each tower tray and the inner side wall of the tower body, a fixed cylinder is fixed in the tower body and located between a distillation furnace and the tower trays, and a rotating shaft is rotationally connected into the fixed cylinder; the distillation tower further comprises a power mechanism, and the power mechanism drives the rotating shaft to rotate. Cadmium melt is evaporated and vaporized into cadmium steam, the cadmium steam containing impurities rises to make contact with the tower tray and flows back into the distillation furnace to be subjected to secondary heating, the metal melt in the distillation furnace is stirred through the stirring blades, the uniformity of fluid is improved, and the purity of the cadmium steam is improved after multiple evaporation-liquefaction processes.

Description

Technical Field

[0001] This utility model relates to the field of distillation tower equipment technology, and in particular to a distillation tower with a stirring function. Background Technology

[0002] A distillation column is a tower-type device used in chemical engineering and the oil refining industry to separate components in a mixture. Its working principle utilizes the differences in boiling points of the components in a liquid mixture, achieving separation through heating. The mixture is heated at the bottom of the distillation column, generating steam. As the steam rises, its temperature gradually decreases, and components with different boiling points condense at different heights, thus separating the different components.

[0003] For example, when collecting cadmium (boiling point 767℃), metals such as nickel (boiling point 2732℃) and copper (boiling point 2562℃) are mixed together in cadmium. The cadmium is separated by heating it in a distillation column, causing it to turn into a gaseous state and move upward.

[0004] In existing distillation columns, the mixture tends to carry impurities upwards during the heating process, resulting in insufficiently pure collected substances that affect subsequent production. Summary of the Invention

[0005] To address the problem of impurities easily carried by mixtures in existing distillation columns during heating, this invention proposes a distillation column with a stirring function. During distillation, when a certain temperature is reached, the molten cadmium vaporizes into cadmium vapor. At this time, the cadmium vapor carries some impurities that have not reached their boiling point. The cadmium vapor containing impurities rises and contacts the tray, where some of the cadmium vapor condenses and liquefies, flowing back into the distillation furnace for secondary heating. At this time, the molten metal in the distillation furnace is stirred by stirring blades to increase the uniformity of the fluid. After multiple evaporation-liquefaction processes, the purity of the cadmium vapor is improved.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows:

[0007] A distillation column with stirring function includes a hollow column body, a condenser on the upper side and a distillation furnace on the lower side. Multiple trays are staggered vertically on the inner wall of the column, with the trays tilted downwards. One side of each tray is fixed to the inner wall of the column body, while the other side is spaced apart from the inner wall. A fixed cylinder is fixed inside the column body, located between the distillation furnace and the trays. A rotating shaft is rotatably connected to the fixed cylinder, with its lower end extending out of the fixed cylinder and equipped with stirring blades located in the distillation furnace. The distillation column also includes a power mechanism that drives the rotating shaft to rotate. The downwardly tilted trays facilitate the reflux of liquefied cadmium vapor.

[0008] Furthermore, a fixing rod is fixed to the outer wall of the fixing cylinder, and the fixing rod is fixedly connected to the inner wall of the tower body.

[0009] Furthermore, the power mechanism includes a first bevel gear, a second bevel gear, and a motor. The rotating shaft is fixedly connected to the first bevel gear, the first bevel gear is inside the fixed cylinder, the output end of the motor extends into the fixed cylinder and its end is fixedly connected to the second bevel gear, and the first bevel gear meshes with the second bevel gear.

[0010] Furthermore, the motor is located outside the tower body and fixed to the support. A cover is provided on one side of the motor's output end.

[0011] Furthermore, the fixed cylinder is equipped with a limiting mechanism, which includes a limiting seat, a limiting plate, and a bearing. The bearing is rotatably sleeved on the rotating shaft, and the outer side of the bearing is fixedly connected to the limiting plate. A limiting groove is formed in the limiting seat, and the limiting plate is inserted into the limiting groove and fixedly connected to the limiting seat. The inner ring of the bearing is interference-fitted with the rotating shaft to prevent axial movement of the rotating shaft.

[0012] Furthermore, the limiting seats are arranged opposite each other, and limiting plates are provided on both sides of the bearing.

[0013] The beneficial effects of this utility model through the above technical solution are as follows: When distilling, the cadmium melt will vaporize into cadmium vapor after reaching a certain temperature. At this time, the cadmium vapor will carry some impurities that have not reached the boiling point. The cadmium vapor containing impurities rises and contacts the tray. Impurity metal vapor with a boiling point higher than cadmium and some cadmium vapor will condense and liquefy here, and flow down along the inclined tray and back into the distillation furnace for reheating and vaporization. The stirring blades stir the metal melt in the distillation furnace, increase the uniformity of the fluid, and improve the heating efficiency. After multiple evaporation-liquefaction processes, the purity of cadmium vapor is improved. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a distillation column with stirring function according to the present invention;

[0015] Figure 2 This is a schematic diagram showing the cross-section of a distillation column with a stirring function according to the present invention.

[0016] Figure 3 This is a cross-sectional structural diagram of the fixed cylinder portion of a distillation column with stirring function according to this utility model.

[0017] Figure 4 This is a schematic diagram of the power mechanism of a distillation column with stirring function according to the present invention.

[0018] In the attached diagram, the following numbers are used: 1 is the tower body, 2 is the condenser, 3 is the distillation furnace, 4 is the tower tray, 5 is the fixed cylinder, 6 is the rotating shaft, 7 is the stirring blade, 8 is the fixed rod, 9 is the first bevel gear, 10 is the second bevel gear, 11 is the motor, 12 is the support, 13 is the limit seat, 14 is the limit plate, 15 is the bearing, and 16 is the cover. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0020] like Figures 1-4 As shown, this embodiment provides a distillation column with stirring function, including a hollow column body 1. A condenser 2 is provided on the upper side of the column body 1 and a distillation furnace 3 is provided on the lower side. Multiple trays 4 are staggered vertically on the inner wall of the column body 1. The trays 4 are inclined downwards. One side of the tray 4 is welded and fixed to the inner wall of the column body 1, and the other side has a gap with the inner wall of the column body 1 so that metal vapor can pass through.

[0021] In this embodiment, the distillation furnace 3 is a vacuum distillation furnace; the trays 4 are in two groups, three in each group, and the two groups are staggered. At the same time, the side of the tray 4 that is closer to the inner wall of the distillation furnace 3 is higher than the side of the tray 4 that is farther away from the inner wall of the distillation furnace 3.

[0022] Furthermore, a fixed cylinder 5 is fixed inside the tower body 1, and a fixed rod 8 is fixed on the outer side wall of the fixed cylinder 5. The fixed rod 8 is fixedly connected to the inner side wall of the tower body 1. The fixed cylinder 5 is located between the distillation furnace 3 and the tower tray 4, and a rotating shaft 6 is rotatably connected in the fixed cylinder 5.

[0023] Specifically, the fixed cylinder 5 is provided with a limiting mechanism, which includes a limiting seat 13, a limiting plate 14 and a bearing 15. The bearing 15 is rotatably sleeved on the rotating shaft 6. The outer side of the bearing 15 is fixedly connected to the limiting plate 14. A limiting groove is opened in the limiting seat 13. The limiting plate 14 is inserted into the limiting groove and fixedly connected to the limiting seat 13 by bolts.

[0024] The inner ring of the bearing 15 is interference-fitted with the rotating shaft 6 to prevent axial movement of the rotating shaft 6. In this embodiment, the limiting seats 13 are arranged opposite each other, with two sets arranged vertically, and the bearing 15 is provided with limiting plates 14 on both sides that cooperate with the limiting seats 13.

[0025] The distillation column also includes a power mechanism, which drives the rotating shaft 6 to rotate.

[0026] Specifically, the power mechanism includes a first bevel gear 9, a second bevel gear 10, and a motor 11. The rotating shaft 6 is fixedly connected to the first bevel gear 9, which is inside the fixed cylinder 5. The output end of the motor 11 extends into the fixed cylinder 5, and its end is fixedly connected to the second bevel gear 10. The first bevel gear 9 and the second bevel gear 10 mesh. The lower end of the rotating shaft 6 extends out of the fixed cylinder 5, and its end is provided with a stirring blade 7, which is located in the distillation furnace 3.

[0027] In this embodiment, the motor 11 is located outside the tower body 1 and fixed on the bracket 12.

[0028] When the liquid in the distillation furnace 3 needs to be stirred, the motor 11 is started. The output shaft of the motor 11 drives the second bevel gear 10 to rotate, which in turn drives the meshing first bevel gear 9 to rotate, which in turn drives the rotating shaft 6 to rotate, causing the stirring blades 7 to start rotating, thereby improving the distillation efficiency of the liquid.

[0029] After cadmium is heated and vaporized, the cadmium vapor detaches from the liquid surface and flows to the top where the vapor saturation is slightly lower. When it passes through the tray 4 inside the column body 1, impurity metal vapors with boiling points higher than cadmium, as well as some cadmium vapor, will condense and liquefy here, and flow back down along the inclined tray 4 into the vacuum distillation furnace 3 for reheating and vaporization. The metal molten liquid in the distillation furnace 3 is stirred by the stirring blades 7 to increase the uniformity of the fluid. After multiple evaporation-liquefaction processes, the purity of the metal vapor is improved. Most of the low-boiling-point cadmium vapor condenses into liquid in the condenser 2 above the tray 4 after passing through the tray 4, thus completing the distillation.

[0030] The embodiments described above are merely preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the patent claims of this utility model should be included within the scope of the patent application of this utility model.

Claims

1. A distillation column with a stirring function, comprising a hollow column body (1), a condenser (2) on the upper side of the column body (1) and a distillation furnace (3) on the lower side, characterized in that, The inner wall of the tower body (1) is provided with multiple tower trays (4) staggered vertically. The multiple tower trays (4) are inclined downwards. One side of the tower tray (4) is fixed on the inner wall of the tower body (1), and the other side is spaced apart from the inner wall of the tower body (1). The tower body (1) is fixed with a fixed cylinder (5), which is located between the distillation furnace (3) and the tower tray (4). A rotating shaft (6) is rotatably connected in the fixed cylinder (5). The lower end of the rotating shaft (6) extends out of the fixed cylinder (5) and its end is provided with stirring blades (7). The stirring blades (7) are located in the distillation furnace (3). The distillation column also includes a power mechanism, which drives the rotating shaft (6) to rotate.

2. A distillation column with stirring function according to claim 1, characterized in that, A fixing rod (8) is fixed on the outer wall of the fixing cylinder (5), and the fixing rod (8) is fixedly connected to the inner wall of the tower body (1).

3. A distillation column with stirring function according to claim 1, characterized in that, The power mechanism includes a first bevel gear (9), a second bevel gear (10), and a motor (11). The rotating shaft (6) is fixedly connected to the first bevel gear (9). The first bevel gear (9) is inside the fixed cylinder (5). The output end of the motor (11) extends into the fixed cylinder (5) and its end is fixedly connected to the second bevel gear (10). The first bevel gear (9) and the second bevel gear (10) mesh.

4. A distillation column with stirring function according to claim 3, characterized in that, The motor (11) is located outside the tower body (1) and fixed on the bracket (12).

5. A distillation column with stirring function according to claim 1, characterized in that, The fixed cylinder (5) is provided with a limiting mechanism, which includes a limiting seat (13), a limiting plate (14) and a bearing (15). The bearing (15) is rotatably sleeved on the rotating shaft (6). The outer side of the bearing (15) is fixedly connected to the limiting plate (14). A limiting groove is opened in the limiting seat (13). The limiting plate (14) is inserted into the limiting groove and fixedly connected to the limiting seat (13).

6. A distillation column with stirring function according to claim 5, characterized in that, The limiting seats (13) are arranged opposite each other, and the bearing (15) is provided with limiting plates (14) on both sides.

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