A medicine material spray drying device

Abstract

The application provides a medicinal material spray drying device, and belongs to the technical field of pharmaceutical equipment, and comprises a drying chamber, a hot air conveying mechanism and a feeding mechanism. A main air duct and a secondary air duct are arranged on the inner wall of the drying chamber. When the hot air conveying mechanism conveys hot air into the drying chamber, the main air duct and the secondary air duct guide the hot air, form a wind wall on the inner wall of the drying chamber, and guide the wind force to the middle of the drying chamber, thereby greatly avoiding the problem that medicinal material powder is adhered to the inner wall of the drying chamber, and a mechanical scraper structure does not need to be arranged, so that the problem of adhesion on the mechanical scraper structure can be avoided.

Description

Technical Field

[0001] This invention belongs to the field of pharmaceutical equipment technology, and specifically relates to a spray drying device for medicinal materials. Background Technology

[0002] Spray drying is a systematic technology applied to material drying. In a drying chamber, a thinner is atomized, and upon contact with hot air, the moisture rapidly vaporizes, resulting in a dried product. This method can directly dry solutions and emulsions into powdered or granular products, eliminating the need for evaporation and pulverization processes. In existing technologies, mechanical scraper structures are used to remove medicinal powder adhering to the inner walls of the drying chamber. However, this method has limitations in cleaning effectiveness, as the scraper structure itself can also accumulate powder. Summary of the Invention

[0003] The present invention aims to at least solve one of the aforementioned technical problems existing in the prior art. To this end, the present invention provides a spray drying device for medicinal materials, which optimizes the mechanical scraper structure and helps to improve the cleaning effect.

[0004] According to a first aspect of the present invention, a spray drying apparatus for medicinal materials includes:

[0005] The drying chamber has multiple main air ducts and secondary air ducts on its inner wall. The main air ducts extend vertically, and the secondary air ducts are located on both sides of the main air ducts. One end of the secondary air duct is connected to the main air duct, and the other end extends away from the main air duct.

[0006] A hot air conveying mechanism is located at the top of the drying chamber and has multiple air outlets arranged in a ring around the inner wall of the drying chamber.

[0007] A feeding mechanism, connected to the drying chamber, is used to deliver raw material liquid into the drying chamber.

[0008] The medicinal spray drying device according to embodiments of the present invention has at least the following beneficial effects: The medicinal spray drying device of the present invention, by setting a main air duct and a secondary air duct on the inner wall of the drying chamber, guides the hot air after the hot air conveying mechanism delivers hot air in, forming a wind wall on the inner wall of the drying chamber and guiding the air force towards the center of the drying chamber, which greatly avoids the problem of medicinal powder adhering to the inner wall of the drying chamber, and eliminates the need for a mechanical scraper structure, thus avoiding the problem of adhesion on the mechanical scraper structure.

[0009] According to some embodiments of the present invention, the end of the secondary air duct that is away from the main air duct is higher than the end of the secondary air duct that is connected to the main air duct.

[0010] According to some embodiments of the present invention, the concave depth of the main air duct relative to the inner wall of the drying chamber decreases in the downward direction, and the concave depth of the bottom of the main air duct is 0 mm.

[0011] According to some embodiments of the present invention, along the length of the secondary air duct, the concave depth of the secondary air duct relative to the inner wall of the drying chamber is the same.

[0012] According to some embodiments of the present invention, both sides of the main air duct and the secondary air duct smoothly transition to the inner wall of the drying chamber.

[0013] According to some embodiments of the present invention, the hot air conveying mechanism includes an annular air duct, which is disposed at the top of the drying chamber. The lower end of the annular air duct is provided with an air outlet corresponding to each of the main air ducts, and the width of the air outlet is greater than the upper width of the main air duct.

[0014] According to some embodiments of the present invention, the feeding mechanism includes multiple feed pipes horizontally disposed in the drying chamber, the multiple feed pipes being arranged in a radiating shape around the center of the drying chamber, and the lower end of each feed pipe being provided with a feed inlet.

[0015] According to some embodiments of the present invention, the feed inlet is a straight groove extending along the length direction of the feed pipe.

[0016] According to some embodiments of the present invention, the width of the feed inlet is increased in the vertical direction.

[0017] According to some embodiments of the present invention, the medicinal material spray drying apparatus further includes:

[0018] A primary separation mechanism, comprising a first discharge pipe connected to the lower region of the drying chamber, a first cyclone separator connected to the first discharge pipe, and a first exhaust pipe connected to the upper end of the first cyclone separator;

[0019] The secondary separation mechanism includes a second discharge pipe connected to the bottom of the drying chamber, a second cyclone separator connected to the second discharge pipe, and a second exhaust pipe connected to the upper end of the second cyclone separator. The second discharge pipe has a branch pipe connected to the lower end of the first cyclone separator.

[0020] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and some of these additional aspects and advantages will become apparent from the description or may be learned by practice of the invention. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0022] Figure 1 This is a schematic diagram of an overall structure of the present invention;

[0023] Figure 2 This is a schematic diagram of a drying chamber structure;

[0024] Figure 3 This is a schematic diagram of one possible air outlet configuration. Detailed Implementation

[0025] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0026] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element 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 invention.

[0027] In the description of this invention, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features or their sequential relationship.

[0028] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0029] Spray drying is a systematic technology applied to material drying. In a drying chamber, a thinner is atomized, and upon contact with hot air, the moisture rapidly vaporizes, resulting in a dried product. This method can directly dry solutions and emulsions into powdered or granular products, eliminating the need for evaporation and pulverization processes. In existing technologies, mechanical scraper structures are used to remove medicinal powder adhering to the inner walls of the drying chamber. However, this method has limitations in cleaning effectiveness, as the scraper structure itself can also accumulate powder.

[0030] Therefore, the present invention provides a spray drying device for medicinal materials, which optimizes the mechanical scraper structure and helps to improve the cleaning effect.

[0031] Reference Figures 1 to 3As shown, an embodiment of the medicinal herb spray drying device of the present invention includes a drying chamber 100, a hot air conveying mechanism 300, and a feeding mechanism 200. The drying chamber 100 is similar to commercially available drying structures, being a cylindrical structure with a conical funnel-shaped lower end and a corresponding discharge port. The inner wall of the drying chamber 100 is provided with multiple main air ducts 101 and secondary air ducts 102, with the main air ducts 101 evenly distributed around the circumference of the drying chamber 100. The main air ducts 101 extend vertically. The secondary air ducts 102 are located on both sides of the main air ducts 101, with one end connected to the main air duct 101 and the other end extending away from the main air duct 101. Since the main air ducts 101 extend vertically, i.e., there is a gap between the two main air ducts 101 in the circumferential direction, the secondary air ducts 102 can effectively fill the area between the two main air ducts 101, creating airflow guidance in this area. A hot air conveying mechanism 300 is located at the top of the drying chamber 100, and multiple air outlets are arranged in a ring around the inner wall of the drying chamber 100. Thus, when the hot air conveying mechanism 300 delivers hot air into the drying chamber 100, the airflow is guided through the main air duct 101 and the secondary air duct 102, forming an airflow wall covering the entire inner wall of the drying chamber 100. A feeding mechanism 200 is connected to the drying chamber 100 and is used to deliver raw material liquid into the drying chamber 100.

[0032] It is understood that the herbal spray drying device of this invention, by setting a main air duct 101 and a secondary air duct 102 on the inner wall of the drying chamber 100, guides the hot air after the hot air conveying mechanism 300 delivers hot air, forming an air wall on the inner wall of the drying chamber 100 and directing the airflow towards the center of the drying chamber 100. This greatly avoids the problem of herbal powder adhering to the inner wall of the drying chamber 100, and eliminates the need for a mechanical scraper structure, thus avoiding the problem of adhesion on the mechanical scraper structure. Compared with the traditional structure with a mechanical scraper structure, it eliminates the problem of difficult-to-clean herbal powder adhering to the mechanical scraper structure and eliminates the need for a separate cleaning process after shutdown, thus helping to improve production efficiency.

[0033] Reference Figure 2In some embodiments of the present invention, the end of the secondary air duct 102 furthest from the main air duct 101 is higher than the end of the secondary air duct 102 connected to the main air duct 101. Thus, when the hot air conveying mechanism 300 delivers hot air to the inner wall of the drying chamber 100, it is first guided downwards through the main air duct 101, and then guided to both sides along the corresponding secondary air duct 102. Since the end of the secondary air duct 102 extends upwards, the resulting airflow direction is also upwards. This creates an airflow barrier on the inner wall of the drying chamber 100 to prevent the medicinal powder from sticking together, and also prevents the liquid medicine from being blown downwards, affecting the drying effect. Therefore, the structural arrangement of this embodiment can generate upward airflow to ensure that the liquid medicine is sufficiently dried.

[0034] Reference Figure 2 In some embodiments of the present invention, the concave depth of the main air duct 101 relative to the inner wall of the drying chamber 100 decreases from top to bottom, and the concave depth of the bottom of the main air duct 101 is 0 mm. It can be understood that in this embodiment, the depth of the main air duct 101 gradually decreases from top to bottom, and the bottom depth of the main air duct 101 is 0 mm, that is, it is in contact with the inner wall of the drying chamber 100. Thus, overall, the main air duct 101 has a function of guiding airflow towards the center while simultaneously guiding it upwards.

[0035] In some embodiments of the present invention, the concave depth of the secondary air duct 102 relative to the inner wall of the drying chamber 100 is the same along the length of the secondary air duct 102. Since the hot air conveying mechanism 300 delivers air downwards, the air force in the secondary air duct 102 is mainly drawn from the main air duct 101. Therefore, the design with a constant depth can ensure uniform air force within the length of the secondary air duct 102, thereby avoiding weakening of air force in the areas on both sides of the main air duct 101 and affecting the anti-sticking effect of the air wall.

[0036] In some embodiments of the present invention, both sides of the main air duct 101 and the secondary air duct 102 smoothly transition to the inner wall of the drying chamber 100. Since the airflow ultimately acts on the raw material liquid inside the drying chamber 100, a smooth transition facilitates uniform airflow discharge.

[0037] In some embodiments of the present invention, the hot air conveying mechanism 300 includes an annular air duct located at the top of the drying chamber 100. Each main air duct 101 has a corresponding air outlet 301 at its lower end, and the width of the air outlet 301 is greater than the upper width of the main air duct 101. Using this structural configuration, air can be delivered towards the main air duct 101 via the air outlets 301, ensuring sufficient airflow intensity in the main air duct 101. Simultaneously, because the width of the air outlets 301 is greater than the upper width of the main air duct 101, airflow is also available to the areas on both sides of the main air duct 101. Combined with the guiding effect of the main air duct 101 and the secondary air duct 102, this facilitates the formation of an airflow wall along the entire inner wall of the drying chamber 100.

[0038] Reference Figure 3 Specifically, the width of the air outlet 301 is an arc-shaped structure consistent with the circumferential curvature of the drying chamber 100. The distal end of the air outlet 301 is a vertical arc-shaped wall that connects to the inner wall of the drying chamber 100, while the proximal end of the air outlet 301 is a conical wall. The distance between its lower end and the inner wall of the drying chamber 100 is smaller than the distance between its upper end and the inner wall of the drying chamber 100. Thus, when air is discharged, the reduced size of the lower end of the air outlet 301 increases the air pressure, ensuring a proper airflow barrier effect.

[0039] Reference Figure 2 In some embodiments of the present invention, the feeding mechanism 200 includes multiple feed pipes 201 horizontally disposed within the drying chamber 100. The multiple feed pipes 201 are arranged in a radiating shape around the center of the drying chamber 100, and the lower end of each feed pipe 201 is provided with a feed inlet. Specifically, the feed pipes 201 are centrally connected and remain in communication. When the feeding mechanism 200 feeds in the raw material liquid, it will be simultaneously sprayed into the drying chamber 100 through all the feed pipes 201, which is beneficial to improving drying efficiency and is suitable for both heat-sensitive and non-heat-sensitive raw materials.

[0040] In some embodiments of the present invention, the feed inlet is a straight groove extending along the length of the feed pipe 201. The straight groove can both ensure the atomization effect of the raw material liquid and increase the spray volume.

[0041] In some embodiments of the present invention, the width of the feed inlet is increased along the vertical direction. With the structural arrangement of this embodiment, the lower end of the feed inlet is wider, forming a flared shape, which helps to increase the spray angle and ensures that the raw material liquid is evenly distributed within the drying chamber 100. Simultaneously, it also reduces the amount of raw material liquid remaining on the wall of the feed pipe 201.

[0042] Reference Figure 1In some embodiments of the present invention, the herbal spray drying apparatus further includes a primary separation mechanism and a secondary separation mechanism. Specifically, the primary separation mechanism includes a first discharge pipe 402 connected to the lower region of the drying chamber 100, a first cyclone separator 401 connected to the first discharge pipe 402, and a first exhaust pipe 403 connected to the upper end of the first cyclone separator 401. During the drying process, some of the dried herbal powder or granules are discharged from the first discharge pipe 402 along with the airflow and enter the first cyclone separator 401. Air is discharged through the first exhaust pipe 403, and the herbal powder or granules are discharged from the bottom of the first cyclone separator 401. The secondary separation mechanism includes a second discharge pipe 406 connected to the bottom of the drying chamber 100, a second cyclone separator 404 connected to the second discharge pipe 406, and a second exhaust pipe 405 connected to the upper end of the second cyclone separator 404. The second discharge pipe 406 has a branch pipe 407 connected to the lower end of the first cyclone separator 401. The medicinal powder or granules discharged from the bottom of the drying chamber 100 are fed into the second cyclone separator 404 by air through the second discharge pipe 406. The medicinal powder or granules discharged from the first cyclone separator 401 are also sent into the second cyclone separator 404 and discharged into the final finished product box through the second cyclone separator 404.

[0043] The present invention has been described in detail above with reference to the embodiments. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A spray drying device for medicinal materials, characterized in that, include: The drying chamber has multiple main air ducts and secondary air ducts on its inner wall. The main air ducts extend vertically, and the secondary air ducts are located on both sides of the main air ducts. One end of the secondary air duct is connected to the main air duct, and the other end extends away from the main air duct. A hot air conveying mechanism is located at the top of the drying chamber and has multiple air outlets arranged in a ring around the inner wall of the drying chamber. A feeding mechanism, connected to the drying chamber, is used to deliver raw material liquid into the drying chamber; Along the top-to-bottom direction, the concave depth of the main air duct relative to the inner wall of the drying chamber decreases, and the concave depth of the bottom of the main air duct is 0 mm. The hot air conveying mechanism includes an annular duct located at the top of the drying chamber. Each main air duct has a corresponding air outlet at its lower end, with the width of the air outlet greater than the upper width of the main air duct. The width direction of the air outlet is an arc shape consistent with the circumferential curvature of the drying chamber. The distal end of the air outlet is a vertical arc wall connected to the inner wall of the drying chamber, and the proximal end is a conical wall. The distance between the lower end of the air outlet and the inner wall of the drying chamber is less than the distance between the upper end and the inner wall of the drying chamber.

2. The spray drying apparatus for medicinal materials according to claim 1, characterized in that, The end of the secondary air duct that is furthest from the main air duct is higher than the end of the secondary air duct that is connected to the main air duct.

3. The medicinal material spray drying device according to claim 1, characterized in that, Along the length of the secondary air duct, the concave depth of the secondary air duct relative to the inner wall of the drying chamber is the same.

4. The spray drying apparatus for medicinal materials according to claim 1, characterized in that, Both sides of the main air duct and the secondary air duct smoothly transition to the inner wall of the drying chamber.

5. The spray drying apparatus for medicinal materials according to claim 1, characterized in that, The feeding mechanism includes multiple feed pipes horizontally arranged in the drying chamber. The multiple feed pipes are arranged in a radiating shape around the center of the drying chamber, and the lower end of each feed pipe is provided with a feed inlet.

6. The spray drying apparatus for medicinal materials according to claim 5, characterized in that, The feed inlet is a straight groove extending along the length of the feed pipe.

7. The spray drying apparatus for medicinal materials according to claim 6, characterized in that, The width of the feed inlet increases along the vertical direction.

8. The spray drying apparatus for medicinal materials according to claim 1, characterized in that, The medicinal material spray drying device also includes: A primary separation mechanism, comprising a first discharge pipe connected to the lower region of the drying chamber, a first cyclone separator connected to the first discharge pipe, and a first exhaust pipe connected to the upper end of the first cyclone separator; The secondary separation mechanism includes a second discharge pipe connected to the bottom of the drying chamber, a second cyclone separator connected to the second discharge pipe, and a second exhaust pipe connected to the upper end of the second cyclone separator. The second discharge pipe has a branch pipe connected to the lower end of the first cyclone separator.

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