Multi-stage chemical distillation tower

Abstract

The utility model belongs to the technical field of chemical distillation, and particularly relates to a multi-stage chemical distillation tower which comprises a tower bottom component, the tower bottom assembly comprises a collecting cylinder; a surrounding type driving source is installed at the circle center of the upper end in the collecting cylinder, a set of connecting rods are welded to the peripheral face of the rotating end of the surrounding type driving source, a scraper for cleaning scale on the inner wall surface of the collecting cylinder is welded between the ends, close to the inner wall surface of the collecting cylinder, of the set of connecting rods, and a vertically-lifting lead screw is arranged at the bottom end of the rotating end of the surrounding type driving source. And a plurality of cleaning needles are fixed at the bottom end of the screw rod. According to the multi-stage chemical distillation tower, the 360-degree self-scale-cleaning structure is erected in the multi-stage chemical distillation tower, the distillation tower does not need to be disassembled and does not need to enter the tower body for cleaning, the multi-stage chemical distillation tower is convenient and fast to use, the cleaning period is short, and the structural integrity of the distillation tower cannot be damaged; and the cleaning needle can also crush and shift the dirt clamped at the inlet of the T-shaped pipe, so that the dirt is prevented from being clamped at the inlet of the T-shaped pipe.

Description

Technical Field

[0001] This utility model relates to the field of chemical distillation technology, and in particular to a multi-stage chemical distillation tower. Background Technology

[0002] In distillation processes in chemical, petroleum, and pharmaceutical industries, the distillation column, as a core piece of equipment, is prone to scale buildup on its inner bottom wall due to high temperature, high humidity, and material residue during long-term operation. This scale, adhering to the back of the column bottom, can easily cause localized corrosion, and in severe cases, even threaten equipment safety and process stability. Therefore, regularly cleaning the scale buildup at the bottom of the column is a crucial step in maintaining the efficient operation of the distillation system.

[0003] The current mainstream cleaning method requires the complete disassembly of the bottom flange or end cap of the tower, and operators need to enter the tower to perform mechanical or chemical cleaning. This process requires multiple steps such as shutdown, depressurization, cooling, and replacement, resulting in a long production interruption period (usually several days to several weeks). This process is not only time-consuming and labor-intensive, increasing downtime and reducing production efficiency, but also may cause potential damage to the structural integrity of the distillation tower during disassembly, increasing maintenance costs and safety risks. In addition, the scale that is cleaned is large in volume and is easy to block the drain outlet and cannot fall down, affecting normal scale discharge. Utility Model Content

[0004] In order to overcome the defects of the prior art mentioned above, the inventors conducted in-depth research and, after a great deal of creative work, completed this utility model.

[0005] Specifically, the technical problem to be solved by this utility model is to provide a multi-stage chemical distillation tower to solve the current problems of time-consuming and labor-intensive descaling, which reduces production efficiency, and the large volume of the descaled parts that are easily blocked at the drain outlet and cannot fall down.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0007] A multi-stage chemical distillation column includes a bottom assembly. Multiple column bodies are vertically stacked on the top of the bottom assembly. A column cover is fixed to the end of the uppermost column body away from the bottom assembly. The liquid return end of the bottom assembly is fixedly connected to the water inlet of a reboiler, and the water outlet of the reboiler is connected to the liquid inlet of the bottom assembly, so that the internal heating circulation of the bottom assembly is realized.

[0008] The bottom assembly of the tower includes a collecting cylinder, the bottom end of which is fixedly connected to an end cap, and a T-shaped pipe is fixed at the drain end of the bottom of the end cap.

[0009] A circumferential drive source is installed at the center of the upper part of the collection cylinder. A set of connecting rods is welded to the peripheral surface of the rotating end of the circumferential drive source. A scraper for cleaning scale on the inner wall of the collection cylinder is welded between the ends of the connecting rods near the inner wall of the collection cylinder. A vertically lifting screw is provided at the bottom end of the rotating end of the circumferential drive source. Multiple cleaning needles are fixed at the bottom end of the screw.

[0010] As an improved technical solution, the scraper is provided with an arc-shaped end near the end cap for cleaning the scale on the inner wall of the end cap, and the arc surface of the arc-shaped end is adapted to the arc surface of the inner wall of the end cap.

[0011] As an improved technical solution, the surrounding drive source includes two fixed rods welded to the inner wall of the collecting cylinder, a gearbox welded between the opposite ends of the two fixed rods, and a rotating column rotatably mounted on the bottom end of the gearbox via a sealed bearing.

[0012] As an improved technical solution, the surrounding drive source also includes a motor cover fixed to the outer wall of the collecting cylinder. A drive motor is installed inside the motor cover. A shaft is fixedly connected to the drive end of the drive motor. A bevel gear transmission component is installed at the end of the shaft away from the drive motor and the end of the rotating column located inside the gearbox.

[0013] As an improved technical solution, the lead screw, the collecting cylinder and the rotating column are in a coaxial state, and the cleaning needle is directly above the upper port of the T-tube.

[0014] As an improved technical solution, a threaded hole is provided at the center of the top of the rotating column, and the rotating column is threadedly connected to the lead screw through the threaded hole. A guide groove is provided at the top of the lead screw, and a guide rod is vertically slidably connected to the lead screw through the guide groove. The top of the guide rod is fixed to the top of the inner wall of the gearbox.

[0015] After adopting the above technical solution, the beneficial effects of this utility model are:

[0016] 1. In this utility model, after the solution falls into the bottom component of the tower, it is sent into the reboiler through the T-tube. After reboiling in the reboiler, it is sent back into the collecting cylinder to achieve circulation. At the same time, the drive motor drives the shaft to rotate, and under the transmission action of the bevel gear, the rotating column rotates with the shaft. That is, the drive motor can drive the rotating column to rotate. While the rotating column is rotating, it will drive the scraper to rotate through the connecting rod. The scraper cleans the scale on the inner wall of the collecting cylinder and the end cap. After the scraper rotates one revolution, the drive motor drives the rotating column to rotate in the opposite direction, so that the scraper rotates one revolution counterclockwise.

[0017] 2. In this utility model, the rotating column is connected to the lead screw through a threaded hole, which drives the lead screw to move downwards. This causes the cleaning needle to poke at the dirt stuck at the inlet of the T-tube. On the one hand, it can break up large dirt deposits and move the dirt at the inlet, making it easier for it to enter the interior of the T-tube. When the scraper rotates in the opposite direction, the cleaning needle is reset upwards under the threaded transmission action of the rotating column and the lead screw. Therefore, while the scraper cleans the dirt on the inner wall, the cleaning needle also breaks up and deflects the dirt stuck at the inlet of the T-tube, preventing the dirt from getting stuck at the inlet of the T-tube and ensuring that the dirt enters the interior of the T-tube smoothly.

[0018] 3. This utility model, by installing a 360-degree self-cleaning structure inside, eliminates the need to disassemble the distillation column or enter the column for cleaning. It is convenient, quick, and has a short cleaning cycle. It will not damage the integrity of the distillation column structure. Furthermore, while the scraper cleans the scale buildup on the inner wall, the cleaning needle also breaks up and deflects the dirt stuck at the inlet of the T-tube, preventing the scale from getting stuck at the inlet of the T-tube and ensuring that the scale enters the interior of the T-tube smoothly. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0020] Figure 1 This is a schematic diagram of the overall structure of a multi-stage chemical distillation tower according to the present invention.

[0021] Figure 2 This is a schematic diagram of the bottom assembly of a multi-stage chemical distillation tower according to the present invention.

[0022] Figure 3 This is a cross-sectional structural diagram of the collecting cylinder of a multi-stage chemical distillation tower according to the present invention.

[0023] Figure 4 This is a cross-sectional structural diagram of the rotating column of a multi-stage chemical distillation tower according to the present invention.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Tower bottom assembly; 11. Collecting cylinder; 12. End cap; 13. T-tube; 2. Tower body; 3. Tower cover; 4. Reboiler; 5. Surround drive source; 51. Fixing rod; 52. Gearbox; 53. Shaft; 54. Drive motor; 55. Motor cover; 56. Rotating column; 57. Bevel gear transmission component; 58. Guide rod; 59. Guide groove; 510. Threaded hole; 6. Connecting rod; 7. Scraper; 8. Lead screw; 9. Cleaning needle. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0028] Meanwhile, the meaning of "and / or" or "and / or" appearing throughout the text is that it includes three options. Taking "A and / or B" as an example, it includes option A, option B, or an option that satisfies both A and B.

[0029] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0030] like Figures 1 to 4As shown in the figure, this embodiment provides a multi-stage chemical distillation column. This multi-stage chemical distillation column includes a bottom assembly 1. Multiple column bodies 2 are vertically stacked on the top of the bottom assembly 1. A liquid inlet is installed on one side of each column body 2. Multiple packing sections are vertically stacked inside each column body 2. A cover 3 is fixed to the end of the uppermost column body 2 away from the bottom assembly 1. An exhaust end is provided on the top of the cover 3. A condenser is connected to the cover 3 through a pipe. The return liquid end at the bottom of the bottom assembly 1 is fixedly connected to the inlet of a reboiler 4. The outlet of the reboiler 4 is connected to the inlet of the bottom assembly 1, so that the interior of the bottom assembly 1 can achieve heating and circulation.

[0031] The bottom assembly 1 includes a collecting cylinder 11, an end cap 12 is fixedly connected to the bottom end of the collecting cylinder 11, a T-shaped tube 13 is fixed at the bottom of the end cap 12, and the water inlet of the reboiler 4 is connected to the side outlet of the T-shaped tube 13. The bottom end of the T-shaped tube 13 is the sewage discharge end.

[0032] A circumferential drive source 5 is installed at the center of the upper part of the collection cylinder 11, and the drive end of the circumferential drive source 5 is installed on the outside of the collection cylinder 11. A set of connecting rods 6 are welded to the peripheral surface of the rotating end of the circumferential drive source 5. A scraper 7 for cleaning scale on the inner wall of the collection cylinder 11 is welded between the ends of the connecting rods 6 that are close to the inner wall surface of the collection cylinder 11. A vertically lifting screw 8 is provided at the bottom end of the rotating end of the circumferential drive source 5. Multiple cleaning needles 9 are fixed at the bottom end of the screw 8.

[0033] By installing a 360-degree self-cleaning structure inside, the distillation column does not need to be disassembled or entered for cleaning. This is convenient, quick, and has a short cleaning cycle. It will not damage the integrity of the distillation column structure. While the scraper 7 cleans the scale buildup on the inner wall, the cleaning needle 9 also breaks up and deflects the dirt stuck at the inlet of the T-tube 13, preventing the scale from getting stuck at the inlet of the T-tube 13 and ensuring that the scale enters the interior of the T-tube 13 smoothly.

[0034] like Figures 1 to 4 As shown in the figure, in this embodiment, the scraper 7 is provided with an arc-shaped end near the end cap 12 for cleaning the scale on the inner wall of the end cap 12, and the arc surface of the arc-shaped end is adapted to the arc surface of the inner wall of the end cap 12.

[0035] like Figures 2 to 4 As shown in the figure, in this embodiment, the surrounding drive source 5 includes two fixed rods 51 welded to the inner wall of the collecting cylinder 11. A gearbox 52 is welded between the opposite ends of the two fixed rods 51. A rotating column 56 is rotatably mounted on the bottom end of the gearbox 52 through a sealed bearing, and the end of the connecting rod 6 away from the scraper 7 is welded to the rotating column 56.

[0036] like Figure 4As shown, in this embodiment, the surrounding drive source 5 also includes a motor cover 55 fixed to the outer wall of the collecting cylinder 11. A drive motor 54 is installed inside the motor cover 55. The drive end of the drive motor 54 is fixedly connected to a shaft 53, and the other end of the shaft 53 is located inside the gearbox 52. The gearbox 52, the collecting cylinder 11, and the shaft 53 are in a mechanical seal state. A bevel gear transmission component 57 is installed at the end of the shaft 53 away from the drive motor 54 and the end of the rotating column 56 located inside the gearbox 52. The bevel gear transmission component 57 consists of two meshing bevel gears. One bevel gear is installed at the top of the threaded hole 510, and the other is installed at the end of the shaft 53 located inside the gearbox 52. The drive motor 54 can drive the rotating column 56 to rotate. While the rotating column 56 is rotating, it will drive the scraper 7 to rotate through the connecting rod 6. The scraper 7 cleans the dirt accumulated on the inner wall of the collecting cylinder 11 and the end cover 12.

[0037] like Figures 1 to 3 As shown in the figure, in this embodiment, the lead screw 8, the collecting cylinder 11 and the rotating column 56 are in a coaxial state, and the cleaning needle 9 is directly above the upper port of the T-tube 13.

[0038] like Figures 3 to 4 As shown in the figure, in this embodiment, a threaded hole 510 is provided at the center of the top of the rotating column 56, and the rotating column 56 is threadedly connected to the lead screw 8 through the threaded hole 510. A guide groove 59 is provided at the top of the lead screw 8, and a guide rod 58 is vertically slidably connected to the lead screw 8 through the guide groove 59. The top of the guide rod 58 is fixed to the top of the inner wall of the gearbox 52. While the scraper 7 cleans the scale on the inner wall, the cleaning needle 9 also breaks and deflects the dirt stuck at the inlet of the T-tube 13, so as to prevent the scale from getting stuck at the inlet of the T-tube 13 and ensure that the scale smoothly enters the interior of the T-tube 13.

[0039] During use, after the solution falls into the bottom assembly 1 of the tower, the solution is sent into the reboiler 4 through the T-tube 13. After being reboiled by the reboiler 4, it is sent back into the collecting cylinder 11 to achieve circulation.

[0040] The drive motor 54 drives the shaft 53 to rotate, and under the transmission action of the bevel gear transmission component 57, the rotating column 56 rotates with the shaft 53. That is, the drive motor 54 can drive the rotating column 56 to rotate. While the rotating column 56 rotates, it will drive the scraper 7 to rotate through the connecting rod 6. The scraper 7 cleans the dirt on the inner wall of the collecting cylinder 11 and the end cover 12.

[0041] After the scraper 7 rotates one revolution, the drive motor 54 drives the rotating column 56 to rotate in the opposite direction, so that the scraper 7 rotates one revolution counterclockwise.

[0042] The scraper 7 is driven by the drive motor 54 to rotate alternately in the forward direction and in the reverse direction to clean the accumulated dirt. When the scraper 7 rotates in the forward direction, that is, when the rotating column 56 is in the forward rotation state, under the vertical guidance of the guide rod 58 and the guide groove 59, the lead screw 8 can only move vertically and cannot rotate. The rotating column 56 is threadedly connected to the lead screw 8 through the threaded hole 510, which drives the lead screw 8 to move downward, so that the cleaning needle 9 can puncture the dirt stuck at the inlet of the T-tube 13. On the one hand, it can break down large-sized dirt and move the position of the dirt at the inlet, making it easier for it to enter the interior of the T-tube 13.

[0043] When the scraper 7 rotates in the opposite direction, the cleaning needle 9 is reset upwards by the threaded transmission between the rotating column 56 and the lead screw 8.

[0044] It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. Furthermore, it should be understood that after reading the technical description of this utility model, those skilled in the art can make various alterations, modifications, and / or variations to this utility model, and all such equivalent forms also fall within the scope of protection defined by the appended claims.

Claims

1. A multi-stage chemical distillation column, characterized by: The application relates to a tower bottom assembly (1) which is vertically stacked with a plurality of tower bodies (2) at the top end, the uppermost tower body (2) is fixed with a tower cover (3) at the end away from the tower bottom assembly (1), the bottom of the tower bottom assembly (1) is fixedly connected with the water inlet end of a reboiler (4), and the water outlet end of the reboiler (4) is connected with the liquid inlet end of the tower bottom assembly (1), so that the inside of the tower bottom assembly (1) is heated and circulated. The tower bottom assembly (1) comprises a collecting cylinder (11), the bottom end of the collecting cylinder (11) is fixedly connected with an end cover (12), and the liquid discharge end of the bottom of the end cover (12) is fixedly connected with a T-shaped pipe (13). A surrounding driving source (5) is arranged at the center of the upper end of the inside of the collecting cylinder (11), a group of connecting rods (6) are welded on the peripheral surface of the rotating end of the surrounding driving source (5), a scraper (7) for cleaning the scale on the inner wall surface of the collecting cylinder (11) is welded between the ends of the group of connecting rods (6) close to the inner wall surface of the collecting cylinder (11), a screw rod (8) vertically lifting is arranged at the bottom end of the rotating end of the surrounding driving source (5), and a plurality of cleaning needles (9) are fixed to the bottom end of the screw rod (8).

2. A multi-stage chemical distillation column according to claim 1, characterized in that: The end of the scraper (7) close to the end cover (12) is provided with an arc-shaped end part for cleaning the scale on the inner wall surface of the end cover (12), and the arc surface of the arc-shaped end part is matched with the arc surface of the inner wall surface of the end cover (12).

3. A multi-stage chemical distillation column according to claim 2, characterized in that: The surrounding driving source (5) comprises two fixed rods (51) welded on the inner wall surface of the collecting cylinder (11), a gear box (52) is welded between the opposite ends of the two fixed rods (51), and a rotating column (56) is rotatably arranged at the bottom end of the gear box (52) through a sealing bearing.

4. A multi-stage chemical distillation column according to claim 3, characterized in that: The surrounding driving source (5) further comprises a motor cover (55) fixed on the outer wall surface of the collecting cylinder (11), a driving motor (54) is arranged in the motor cover (55), a shaft rod (53) is fixedly connected with the driving end of the driving motor (54), and a bevel gear transmission part (57) is arranged at the end of the shaft rod (53) away from the driving motor (54) and the end of the rotating column (56) in the gear box (52).

5. A multi-stage chemical distillation column according to claim 4, characterized in that: The screw rod (8), the collecting cylinder (11) and the rotating column (56) are coaxial, and the cleaning needles (9) are vertically above the upper end of the T-shaped pipe (13).

6. A multi-stage chemical distillation column according to claim 5, characterized in that: A threaded hole (510) is arranged at the center of the top end of the rotating column (56), the rotating column (56) is threadedly connected with the screw rod (8) through the threaded hole (510), a guide sliding groove (59) is arranged at the top end of the screw rod (8), a guide rod (58) is vertically and slidingly connected with the screw rod (8) through the guide sliding groove (59), and the top end of the guide rod (58) is fixed to the top of the inner wall surface of the gear box (52).

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