A spray drying tower for producing pharmaceutical grade PVP

Abstract

The utility model discloses a production medical grade PVP is with spray drying tower, including tower body, the top rotation of tower body is provided with liquid inlet pipe, and the bottom end of liquid inlet pipe extends to the inside of tower body and is fixed with two atomizing nozzles, and the top rotation of liquid inlet pipe is provided with L type liquid transfer pipe, and the top of tower body is provided with the drive assembly of drive liquid inlet pipe rotation, and the bottom end of liquid inlet pipe is fixed with the prop, and the surface fixed of prop is provided with four support bars, and the far end of four support bars is provided with the connecting rod, and the same side two connecting rods one end fixed are provided with same scraper, and two scraper all with tower body inner side wall contact, and the bottom end fixed of prop is provided with two T type rods, and two T type rods all with tower body inner side bottom contact. Through the prop drive four support bars rotation, four support bars drive four connecting rods rotation, four connecting rods drive two scraper rotation, through two scraper scrape the material that tower body inner side wall adheres and fall, avoid the influence spray drying tower's drying effect, and then improve the work efficiency of spray drying tower.

Description

Technical Field

[0001] This utility model relates to the field of spray drying tower technology, and more specifically to a spray drying tower for producing pharmaceutical-grade PVP. Background Technology

[0002] PVP, or polyvinylpyrrolidone, is a nonionic polymer compound. It is the most distinctive and extensively studied fine chemical among N-vinylamide polymers. It has been developed into a series of homopolymers, copolymers, and crosslinked polymers in three categories: nonionic, cationic, and anionic, and in three grades: industrial, pharmaceutical, and food. The relative molecular masses range from several thousand to over one million. It has been widely used due to its excellent and unique properties. In the production of pharmaceutical-grade polyvinylpyrrolidone, spray drying towers are often required.

[0003] During the use of spray drying towers, improper control of drying conditions can easily lead to material adhering to the inner wall of the tower. The adhering raw material not only affects the drying effect of the spray drying tower, but also causes a certain degree of material waste, thereby reducing the working efficiency of the spray drying tower. Utility Model Content

[0004] The purpose of this invention is to provide a spray drying tower for producing pharmaceutical-grade PVP, in order to solve the problem mentioned in the background art where material tends to adhere to the inner wall of the spray drying tower. The adhered raw material not only affects the drying effect of the spray drying tower, but also causes a certain degree of material waste, thereby reducing the working efficiency of the spray drying tower.

[0005] To achieve the above objectives, this utility model provides a spray drying tower for producing pharmaceutical-grade PVP, comprising a tower body, an inlet pipe rotatably mounted on the top of the tower body, two atomizing nozzles fixedly mounted on the bottom end of the inlet pipe extending into the tower body, an L-shaped inlet pipe rotatably mounted on the top end of the inlet pipe, a drive assembly for driving the rotation of the inlet pipe mounted on the top of the tower body, a support column fixedly mounted on the bottom end of the inlet pipe, four support rods fixedly mounted on the surface of the support column, a connecting rod mounted on the end of each of the four support rods away from the support column, a common scraper fixedly mounted on one end of two connecting rods on the same side, both scrapers contacting the inner wall of the tower body, and two T-shaped rods fixedly mounted on the bottom end of the support column, both T-shaped rods contacting the bottom inner wall of the tower body.

[0006] By adopting the above scheme, the support column drives the four support rods to rotate, the four support rods drive the four connecting rods to rotate, and the four connecting rods drive the two scraper rods to rotate. The two scraper rods scrape off the material adhering to the inner side wall of the tower, avoiding affecting the drying effect of the spray drying tower, thereby improving the working efficiency of the spray drying tower.

[0007] As a further improvement to this technical solution, a rectangular groove is provided at one end of the support rod near the connecting rod, and a spring is fixedly installed in the rectangular groove on the support rod. One end of the connecting rod extends into the rectangular groove and is connected to the spring.

[0008] By adopting the above solution, the scraper can be extended and floated by setting a spring, thereby avoiding excessive friction between the scraper and the inner wall of the tower, which would cause the inlet pipe to rotate poorly.

[0009] As a further improvement to this technical solution, the scraper sidewall is provided with a scraping part that fits against the inner sidewall of the tower body, and the scraping part is configured as an arc-shaped surface structure.

[0010] By adopting the above solution, the scraping section makes the contact between the scraper and the inner wall of the tower smoother, avoiding the situation where the scraper is difficult to extend, retract and float.

[0011] As a further improvement to this technical solution, a rotary joint is provided at the top of the inlet pipe, and the inlet pipe is rotatably engaged with the L-shaped infusion pipe through the rotary joint.

[0012] By adopting the above solution, the inlet pipe is connected to the L-shaped infusion pipe through a rotary joint, which also facilitates the rotation of the inlet pipe.

[0013] As a further improvement to this technical solution, the drive assembly includes a motor, which is fixedly mounted on the top of the tower body. A first bevel gear is fixedly mounted on the output end of the motor, and a second bevel gear is fixedly sleeved on the outer wall of the liquid inlet pipe. The first bevel gear and the second bevel gear are meshed and connected.

[0014] By adopting the above scheme, the inlet pipe is driven to rotate by the drive component, and the inlet pipe drives the two atomizing nozzles to rotate, thereby causing the two atomizing nozzles to rotate and spray.

[0015] As a further improvement to this technical solution, an L-shaped hot air pipe is provided at the top of the tower body, and a filter element is provided at the upper end of the L-shaped hot air pipe.

[0016] By adopting the above solution, hot air is introduced through an L-shaped hot air duct and filtered through a filter element to remove dust and other impurities, thus avoiding any impact on the PVP raw material.

[0017] As a further improvement to this technical solution, a discharge pipe is provided at the bottom of the tower body, and a hopper connected to the discharge pipe is provided at the bottom of the inner side of the tower body.

[0018] By adopting the above scheme, the finished PVP powder material is collected in the hopper and discharged through the discharge pipe.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. By setting up a drive component, the inlet pipe is rotated, which in turn drives the two atomizing nozzles to rotate and spray, so that the PVP material is quickly and evenly distributed in the tower body, effectively ensuring that the PVP material is in full contact with the hot air and improving the drying speed of the PVP material.

[0020] 2. By setting up scrapers, the support pillar drives four support rods to rotate, the four support rods drive four connecting rods to rotate, and the four connecting rods drive two scrapers to rotate. The two scrapers scrape off the material adhering to the inner wall of the tower. By setting springs, the scrapers can extend and float, thereby avoiding excessive friction between the scrapers and the inner wall of the tower, which could cause the liquid inlet pipe to rotate poorly and affect the drying effect of the spray drying tower, thus improving the working efficiency of the spray drying tower. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the overall cross-section of the utility model; Figure 3 A schematic diagram of the inlet pipe and support column of the utility model; Figure 4 This is a cross-sectional structural schematic diagram of the support rod of the utility model.

[0022] The meanings of the labels in the diagram are as follows: 1. Tower body; 2. Inlet pipe; 3. Atomizing nozzle; 4. L-shaped inlet pipe; 5. Support column; 6. Support rod; 7. Connecting rod; 8. Scraper bar; 9. T-shaped rod; 10. Spring; 11. Scraper section; 12. Rotary joint; 13. Motor; 14. First bevel gear; 15. Second bevel gear; 16. L-shaped hot air pipe; 17. Filter element; 18. Discharge pipe. Detailed Implementation

[0023] 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.

[0024] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0025] Please see Figures 1-3 As shown, this utility model provides a spray drying tower for producing pharmaceutical-grade PVP, including a tower body 1. An L-shaped hot air duct 16 is installed at the top of the tower body 1, and a filter element 17 is installed at the upper end of the L-shaped hot air duct 16. The L-shaped hot air duct 16 is connected to an external hot air blower (existing technology). Hot air is introduced into the tower body 1 through the L-shaped hot air duct 16 and filtered through the filter element 17 to remove dust and other impurities, preventing them from affecting the PVP raw material. A liquid inlet pipe 2 is rotatably installed at the top of the tower body 1 via a bearing. The bottom end of the liquid inlet pipe 2 extends into the tower body 1 and is fixedly equipped with two atomizing nozzles 3. An L-shaped delivery pipe 4 is rotatably installed at the top of the liquid inlet pipe 2. PVP raw material is introduced through the L-shaped delivery pipe 4 and transported to the liquid inlet pipe 2, then sprayed out through the two atomizing nozzles 3. After atomization, the PVP raw material comes into contact with the hot air inside the tower body 1, thereby drying into a powdery material. A rotary joint 12 is provided at the top of the pipe 2. The inlet pipe 2 is rotatably engaged with the L-shaped inlet pipe 4 through the rotary joint 12. The rotary joint 12 connects the inlet pipe 2 and the L-shaped inlet pipe 4 and facilitates the rotation of the inlet pipe 2. A drive assembly for driving the rotation of the inlet pipe 2 is provided at the top of the tower body 1. The drive assembly includes a motor 13, which is fixedly installed at the top of the tower body 1. A first bevel gear 14 is fixedly installed at the output end of the motor 13. A second bevel gear 15 is fixedly sleeved on the outer wall of the inlet pipe 2. The first bevel gear 14 and the second bevel gear 15 are meshed and connected. The motor 13 drives the first bevel gear 14 to rotate, which in turn drives the second bevel gear 15 to rotate. The second bevel gear 15 drives the inlet pipe 2 to rotate, which in turn drives the two atomizing nozzles 3 to rotate and spray, so that the PVP raw material is quickly and evenly distributed in the tower body 1, thereby improving the drying speed of the PVP raw material.

[0026] Please see Figures 2-4As shown, the bottom end of the liquid inlet pipe 2 is sealed, and a support column 5 is fixedly installed at the bottom end of the liquid inlet pipe 2. Four support rods 6 are fixedly installed on the surface of the support column 5. Each of the four support rods 6 has a connecting rod 7 at the end away from the support column 5. The same scraper 8 is fixedly installed at one end of two connecting rods 7 on the same side. Both scraper 8 are in contact with the inner wall of the tower body 1. The liquid inlet pipe 2 drives the support column 5 to rotate, the support column 5 drives the four support rods 6 to rotate, the four support rods 6 drive the four connecting rods 7 to rotate, and the four connecting rods 7 drive the two scraper 8 to rotate. The two scraper 8 scrape off the material attached to the inner wall of the tower body 1. A rectangular groove is opened at the end of the support rod 6 near the connecting rod 7. A spring 10 is fixedly installed in the rectangular groove of the support rod 6. One end of the connecting rod 7 extends into the rectangular groove and is connected to the spring 10. The spring 10 allows the scraper 8 to extend, retract, and float. To avoid excessive friction between the scraper 8 and the inner wall of the tower body 1, which could cause the inlet pipe 2 to rotate poorly, the scraper 8 has a scraping part 11 that fits against the inner wall of the tower body 1. The scraping part 11 is designed with an arc-shaped surface structure. By setting the scraping part 11, the contact between the scraper 8 and the inner wall of the tower body 1 becomes smoother, avoiding the situation where the scraper 8 is difficult to extend and float. Two T-shaped rods 9 are fixedly installed at the bottom of the support column 5. Both T-shaped rods 9 are in contact with the bottom of the inner side of the tower body 1. The support column 5 drives the two T-shaped rods 9 to rotate, scraping the bottom of the inner side of the tower body 1 through the two T-shaped rods 9 and supporting the bottom of the support column 5. The bottom of the tower body 1 is provided with a discharge pipe 18, and the bottom of the inner side of the tower body 1 is provided with a hopper that connects to the discharge pipe 18. The finished PVP powder material is collected through the hopper and discharged through the discharge pipe 18.

[0027] The specific working principle of this utility model is as follows: PVP raw material is introduced through L-shaped infusion pipe 4, and then transported to inlet pipe 2 through L-shaped infusion pipe 4. It is then sprayed out through two atomizing nozzles 3. After atomization, the PVP raw material comes into contact with the hot air inside the tower body 1, and is then dried to form powder. The motor 13 drives the first bevel gear 14 to rotate, the first bevel gear 14 drives the second bevel gear 15 to rotate, the second bevel gear 15 drives the inlet pipe 2 to rotate, and the inlet pipe 2 drives the two atomizing nozzles 3 to rotate, thereby causing the two atomizing nozzles 3 to rotate and spray, so that the PVP raw material is quickly and evenly distributed in the tower body 1, improving the drying speed of the PVP raw material. The support column 5 drives the four support rods 6 to rotate, the four support rods 6 drive the four connecting rods 7 to rotate, and the four connecting rods 7 drive the two scraper rods 8 to rotate. The two scraper rods 8 scrape off the material attached to the inner wall of the tower body 1. The scraper rods 8 are equipped with springs 10 so that they can extend and float, thereby avoiding excessive friction between the scraper rods 8 and the inner wall of the tower body 1, which would cause the inlet pipe 2 to rotate poorly.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A spray drying tower for producing pharmaceutical-grade PVP, comprising a tower body (1), characterized in that: The top of the tower body (1) is rotatably provided with an inlet pipe (2). The bottom end of the inlet pipe (2) extends into the tower body (1) and is fixedly provided with two atomizing nozzles (3). The top end of the inlet pipe (2) is rotatably provided with an L-shaped inlet pipe (4). The top of the tower body (1) is provided with a drive assembly for driving the inlet pipe (2) to rotate. The bottom end of the inlet pipe (2) is fixedly provided with a support column (5). The surface of the support column (5) is fixedly provided with four support rods (6). The ends of the four support rods (6) away from the support column (5) are all provided with connecting rods (7). The ends of the two connecting rods (7) on the same side are fixedly provided with the same scraper (8). The two scrapers (8) are in contact with the inner wall of the tower body (1). The bottom end of the support column (5) is fixedly provided with two T-shaped rods (9). The two T-shaped rods (9) are in contact with the bottom of the inner side of the tower body (1).

2. The spray drying tower for producing pharmaceutical-grade PVP according to claim 1, characterized in that: The support rod (6) has a rectangular groove at one end near the connecting rod (7). A spring (10) is fixedly installed in the rectangular groove of the support rod (6). One end of the connecting rod (7) extends into the rectangular groove and is connected to the spring (10).

3. The spray drying tower for producing pharmaceutical-grade PVP according to claim 1, characterized in that: The scraper (8) has a scraping part (11) on its side wall that fits against the inner side wall of the tower body (1), and the scraping part (11) is configured as an arc-shaped surface structure.

4. The spray drying tower for producing pharmaceutical-grade PVP according to claim 1, characterized in that: The inlet pipe (2) is provided with a rotary joint (12) at the top end, and the inlet pipe (2) is rotatably connected with the L-shaped infusion pipe (4) through the rotary joint (12).

5. A spray drying tower for producing pharmaceutical-grade PVP according to claim 1, characterized in that: The drive assembly includes a motor (13), which is fixedly mounted on the top of the tower body (1). A first bevel gear (14) is fixedly mounted on the output end of the motor (13), and a second bevel gear (15) is fixedly mounted on the outer wall of the liquid inlet pipe (2). The first bevel gear (14) and the second bevel gear (15) are meshed and connected.

6. A spray drying tower for producing pharmaceutical-grade PVP according to claim 1, characterized in that: The top of the tower body (1) is provided with an L-shaped hot air pipe (16), and a filter element (17) is provided at the upper end of the L-shaped hot air pipe (16).

7. A spray drying tower for producing pharmaceutical-grade PVP according to claim 1, characterized in that: The bottom of the tower body (1) is provided with a discharge pipe (18), and the bottom of the inner side of the tower body (1) is provided with a hopper that connects to the discharge pipe (18).

Images