Medical intermediate rectification equipment

Abstract

The utility model relates to medical intermediate rectification equipment which comprises a tower body, a plurality of tower plates are arranged in the tower body at intervals up and down, a through hole is formed in the center of each tower plate, a sieve plate is arranged on the periphery of each through hole, and a plurality of air holes are formed in the surface of each through hole in a surrounding manner; a downcomer is further arranged on one side, far away from the center, of the downflow weir; a central shaft is arranged in the tower body, a cleaning assembly is further arranged on the central shaft, and a cleaning brush of the cleaning assembly is just attached to the surface of the sieve plate; the original flat surface of the tower plate is modified into the tower plate with the cross section of the V-shaped structure, so that the flow velocity of liquid on the surface of the tower plate can be slowed down, and the contact range between gas and liquid on the surface of the tower plate can be expanded, so that the gas-liquid mass transfer range is expanded, and the working efficiency of the tower plate is effectively improved; impurities are prevented from accumulating and scaling at the air holes to cause blockage, and the maintenance period of the rectifying tower is effectively prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of distillation towers, in particular to a pharmaceutical intermediate distillation device. Background Art

[0002] The plate distillation tower is equipped with several layers of plate plates along the tower height. The liquid flows from the top to the bottom of the tower by gravity, and forms a flowing liquid layer on each plate surface; the gas is pushed by the pressure difference, passing through the liquid layer on each plate in turn from the bottom of the tower to the top of the tower. The gas and liquid phases contact step by step in the tower, and the composition of the two phases changes step by step along the tower height.

[0003] In the commonly used distillation tower structure, the surface of the tower plate is horizontal, and structures such as floating valves, fixed valves, and rotary valves are set on the surface. Therefore, the liquid inside the tower body flows from top to bottom through the surface of the tower plate at a relatively fast speed, and the contact area is limited, which can easily lead to scaling and blockage on the surface of the tower plate. Therefore, regular cleaning is required, so that the entire distillation tower is forced to shut down, affecting its production efficiency. Utility Model Content

[0004] Based on the above description, the utility model provides a pharmaceutical intermediate distillation equipment to solve the shortcomings of the existing distillation tower structure, in which the liquid circulation speed on the tower plate surface is fast and the contact range is small, resulting in reduced gas-liquid mass transfer efficiency on the tower plate, and it is also easy to cause scaling and blockage on the tower plate surface, so that it is forced to shut down for maintenance.

[0005] The utility model is realized through the following technical solutions:

[0006] A pharmaceutical intermediate distillation device comprises a tower body, wherein a plurality of tower plates are arranged at intervals in the upper and lower parts of the tower body, a through hole is arranged at the center of each of the tower plates, a sieve plate is arranged on the periphery of the through hole and a plurality of air holes are arranged around the surface, an overflow weir is arranged at one end of the sieve plate, and a downcomer is also arranged on the side of the overflow weir away from the center; a central axis is arranged inside the tower body and is vertically inserted into the plurality of through holes in sequence and the bottom end is extended to the outside of the tower body, a cleaning assembly is also arranged on the central axis, and a cleaning brush of the cleaning assembly just fits the surface of the sieve plate.

[0007] On the basis of the above technical solution, the present invention can also be improved as follows.

[0008] Furthermore, the sieve plate is annular and embedded in the top surface of the pedal, and the surface of the sieve plate is provided with a groove with a V-shaped cross section, and the groove wall surface of the groove is provided with air holes.

[0009] Furthermore, a partition is provided inside the tower plate and is arranged below the sieve plate. Through holes are provided on the partition plate and the bottom surface of the tower plate and are arranged in a staggered manner. The air holes are connected to the through holes on the partition plate and the tower plate in sequence.

[0010] Furthermore, the cleaning assembly also includes a fixing ring sleeved on the outer wall of the central shaft, the fixing ring is arranged just above the center of the screen plate, and the end of the cleaning brush is fixedly connected to one end of the fixing ring.

[0011] Furthermore, the bottom surface of the cleaning brush extends downward to form a protrusion, which extends exactly to the inside of the groove, and bristles are provided on the outer side wall of the protrusion, and the bristles are arranged obliquely and abut against the inclined inner wall of the groove.

[0012] Furthermore, a drain pipe is provided at the bottom of the tower body, a ball bearing is provided on the inner wall of the drain pipe and is rotatably connected to the bottom end of the central axis, and sealing gaskets are provided on both sides of the ball bearing.

[0013] Furthermore, a through hole is provided on the bottom end surface of the central shaft and extends upward, and an opening is also provided on the outer side wall of the central shaft at the bottom of the tower body, and the opening extends toward the inside of the central shaft and communicates with the through hole.

[0014] Furthermore, a stirring frame is provided on the outer wall of a section of the central axis between the discharge pipe and the cleaning assembly, and a scraper is provided on the side of the stirring frame away from the center, and the end face of the scraper is in contact with the inner wall of the tower body.

[0015] Furthermore, a transmission gear is provided on the outer wall of a section of the central axis outside the tower body, and a drive motor is provided at the bottom of the tower body. The output end of the drive motor extends horizontally and a drive gear is installed at the end, and the drive gear and the transmission gear are meshed with each other.

[0016] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0017] 1. The present application is based on the improvement of the existing distillation tower, and the originally flat tower plate surface is converted into a tower plate with a V-shaped cross-section structure, which can not only slow down the flow rate of the liquid on the tower plate surface, but also expand the contact range between the gas and liquid on the tower plate surface, thereby expanding the range of gas-liquid mass transfer and effectively improving the working efficiency of the tower plate. In addition, a cleaning component is additionally provided in the center of the tower plate, which uses a rotary cleaning method to scrape away impurities around the pores to prevent impurities from accumulating and scaling at the pores and causing blockage, effectively extending the maintenance cycle of the distillation tower and greatly improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the internal structure of the tower body in this embodiment;

[0019] Figure 2 It is a schematic diagram of the structure of the cleaning assembly and the tower plate in this embodiment;

[0020] Figure 3 Schematic diagram of the structure of the sieve plate in this embodiment;

[0021] Figure 4 Schematic diagram of the transmission structure of the driving motor and the central shaft in this embodiment;

[0022] Among them: 1. tower body; 11. drain pipe; 2. tower plate; 21. sieve plate; 22. groove; 23. partition; 3. central axis; 31. stirring frame; 32. scraper; 33. transmission gear; 4. cleaning component; 41. fixing ring; 42. cleaning brush; 5. driving motor; 51. driving gear. DETAILED DESCRIPTION

[0023] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0025] Combination Figure 1-4 As shown, a pharmaceutical intermediate distillation device comprises:

[0026] The tower body 1 is a main structure of a traditional plate-type distillation tower, with an exhaust pipe on the top, a reflux pipe, a liquid inlet pipe and a steam inlet arranged on the side wall from top to bottom, and a liquid discharge pipe 11 at the bottom;

[0027] The tower plates 2 are provided with a plurality of plates, which are arranged in the tower body 1 at intervals in a horizontal manner, and an overflow weir is vertically provided on the top surface, and a downcomer connected to the bottom is provided on the side of the overflow weir away from the center;

[0028] The central axis 3 is arranged at the center of the tower body 1 and passes through the plurality of tower plates 2 in sequence from top to bottom, so that the bottom end thereof is rotated and inserted into the inside of the liquid discharge pipe 11 and extends to the outside of the tower body 1;

[0029] The cleaning components 4 are provided in multiple groups and are arranged above the tower plate 2 in a one-to-one correspondence, so as to clean the surface of the tower plate 2 .

[0030] Specifically, a through hole is provided at the center of the surface of the tower plate 2, and the top surface of the through hole extends toward the periphery to form a stepped surface, and a sieve plate 21 is embedded on the stepped surface. The sieve plate 21 is a circular structure, and its four sides are arranged flush with the surface of the tower plate 2.

[0031] A groove 22 with a V-shaped cross-section is provided on the surface of the sieve plate 21, and a plurality of air holes are provided on the inclined inner wall of the groove 22. These air holes are arranged in a circular array around the center of the sieve plate 21. A partition plate 23 is also provided inside the sieve plate 21. The partition plate 23 and the bottom surface of the sieve plate 21 are provided with through holes of the same size, and the through holes on the two are staggered with each other to prolong the contact time between the gas and liquid phases. Therefore, high-temperature steam can pass through the partition plate 23 and the sieve plate 21 and pass through to the surface of the sieve plate 21 to transfer mass with the liquid phase.

[0032] In this embodiment, the inclination angle of the groove 22 should be between 30° and 55°. When the groove 22 structure is adopted, the liquid falls on the corners of the V-shaped structure and is dispersed and enters the groove during the top-down flow, and flows downward through the through holes of the plates on both sides of the groove, which is beneficial to reduce the liquid flow rate, thereby achieving the effect of dispersing the fluid; at the same time, the steam flows from bottom to top, passes through the hydraulic collision zone on the lower side of the tower plate 2, and has sufficient gas-liquid exchange with the wastewater, which greatly improves the gas-liquid mass transfer efficiency, reduces the pressure drop of the tower plate 2, and avoids the risk of scaling of the tower plate 2.

[0033] The cleaning assembly 4 includes a fixed ring sleeved on the central axis 3, the fixed ring is arranged just above the center of the tower plate 2, and a cleaning brush is horizontally installed at one end of the fixed ring, and a cylindrical protrusion is vertically arranged on the bottom surface of the cleaning brush, each protrusion is vertically arranged inside the groove 22 and a certain distance is retained on both sides thereof, and bristles are arranged on the outer wall of the protrusion at the same time, and the bristles are arranged at an angle, and their ends can fit with the inclined inner wall of the groove 22, thereby cooperating with the rotation of the central axis 3 to achieve a rotary cleaning effect, so as to prevent particulate impurities from accumulating in the through hole and scaling.

[0034] Since the central shaft 3 is inserted into the drain pipe 11 at the bottom of the tower body 1, it is necessary to ensure that the central shaft 3 can rotate as a power source and discharge the collected liquid at the bottom of the tower body 1. Therefore, a ball bearing is provided on the inner wall of the drain pipe 11, and sealing gaskets are provided on both sides of the ball bearing.

[0035] In addition, a cavity is provided inside the lower half of the central shaft 3, which extends downward and penetrates to the end face of the bottom end of the central shaft 3 to form a through hole, and an opening is provided on the outer wall of the central shaft 3, and the opening and the through hole on the bottom are interconnected with the internal cavity, and the opening is located exactly at the tower body 1 for storing the collected liquid, so even when the central shaft 3 rotates, a large amount of recovered liquid will still flow into the opening and be discharged along the through hole at the bottom of the central shaft 3.

[0036] In the process of storing the recovered liquid at the bottom, these liquids will inevitably be mixed with some particulate impurities and form precipitation or adhere to the inner wall of the tower body 1 due to long-term storage. Therefore, a group of stirring racks 31 should be specially arranged on the outer wall of the central axis 3 located below the cleaning component 4. The stirring rack 31 adopts a square frame structure, and the middle part uses a plurality of cross-arranged stirring rods to disturb the flow to prevent the liquid from stagnating and forming precipitation. On the other hand, the scraper 32 close to the inner wall of the tower body 1 uses the rotation of the central axis 3 to scrape off the impurities adhering to the inner wall of the tower body 1, so that it can be discharged along the through hole at the bottom of the central axis 3.

[0037] The rotation of the central axis 3 also requires a driving source, that is, a driving motor 5 is arranged at the bottom of the tower body 1, and the driving motor 5 is arranged on one side of the central axis 3, and a driving gear 51 is arranged on its output end, and a transmission gear 33 is correspondingly arranged on the outer side wall of the central axis 3. The output end of the driving motor 5 extends horizontally and enables the driving gear 51 and the transmission gear 33 to mesh with each other.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solution recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solution from the technical solution of the embodiments of the utility model.

Claims

1. A pharmaceutical intermediate distillation device, characterized in that: The tower body (1) comprises a tower body (1), wherein a plurality of tower plates (2) are arranged at intervals in the upper and lower parts of the tower body (1), a through hole is arranged at the center of each tower plate (2), a sieve plate (21) is arranged outside the through hole and a plurality of air holes are arranged around the surface, an overflow weir is arranged at one end of the sieve plate (21), and a downcomer is also arranged on the side of the overflow weir away from the center; a central axis (3) is arranged inside the tower body (1) and is vertically inserted into the plurality of through holes in sequence and has its bottom end extended to the outside of the tower body (1), a cleaning assembly (4) is also arranged on the central axis (3), and a cleaning brush (42) of the cleaning assembly (4) fits exactly on the surface of the sieve plate (21).

2. A pharmaceutical intermediate distillation device according to claim 1, characterized in that: The sieve plate (21) is annular and embedded in the top surface of the pedal, and the surface of the sieve plate (21) is provided with a groove (22) with a V-shaped cross section, and the groove wall surface of the groove (22) is provided with air holes.

3. A pharmaceutical intermediate distillation equipment according to claim 1, characterized in that: A partition plate (23) is also provided inside the tower plate (2) and is arranged below the sieve plate (21); through holes are provided on the bottom surfaces of the partition plate (23) and the tower plate (2) and are arranged in a staggered manner; and the air holes are sequentially connected to the through holes on the partition plate (23) and the tower plate (2).

4. A pharmaceutical intermediate distillation equipment according to claim 2, characterized in that: The cleaning assembly (4) further comprises a fixing ring (41) sleeved on the outer wall of the central shaft (3), wherein the fixing ring (41) is arranged directly above the center of the sieve plate (21), and an end of the cleaning brush (42) is fixedly connected to one end of the fixing ring (41).

5. A pharmaceutical intermediate distillation device according to claim 4, characterized in that: The bottom surface of the cleaning brush (42) extends downward to form a protrusion, which extends exactly into the interior of the groove (22), and bristles are provided on the outer wall of the protrusion, which are arranged obliquely and exactly abut against the inclined inner wall of the groove (22).

6. A pharmaceutical intermediate distillation device according to claim 1, characterized in that: The bottom of the tower body (1) is also provided with a drain pipe (11), the inner wall of the drain pipe (11) is provided with a ball bearing and is rotatably connected to the bottom end of the central shaft (3), and sealing gaskets are respectively provided on both sides of the ball bearing.

7. A pharmaceutical intermediate distillation device according to claim 6, characterized in that: A through hole is provided on the bottom end surface of the central shaft (3) and extends upwards, and an opening is also provided on the outer wall of the central shaft (3) located at the bottom of the tower body (1), and the opening extends toward the inside of the central shaft (3) and is interconnected with the through hole.

8. A pharmaceutical intermediate distillation device according to claim 7, characterized in that: A stirring frame (31) is also provided on the outer wall of a section of the central axis (3) between the discharge pipe (11) and the cleaning assembly (4); a scraper (32) is provided on the side of the stirring frame (31) away from the center, and the end surface of the scraper (32) is in contact with the inner wall of the tower body (1).

9. A pharmaceutical intermediate distillation device according to claim 1, characterized in that: The central shaft (3) is also provided with a transmission gear (33) on the outer wall of a section outside the tower body (1), and a drive motor (5) is also provided at the bottom of the tower body (1). The output end of the drive motor (5) extends horizontally and is provided with a drive gear (51) at the end, and the drive gear (51) is meshed with the transmission gear (33).

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