Cooling granulation spray dryer

Abstract

The utility model provides a cooling granulation spray dryer, which relates to the technical field of dryers and comprises a drying tower, a cooling drying mechanism and a material returning mechanism arranged at the bottom of the drying tower. The material returning mechanism comprises a second fan, an air inlet pipe, an air distribution disc and a non-return assembly arranged in the air inlet pipe. The non-return assembly comprises a small ball, an air channel, a containing part and a supporting piece. According to the cooling granulation spray dryer, the material screening assembly and the material returning mechanism are arranged, materials are screened, the materials meeting the particle size are discharged, and the materials with the small particle size are blown back to participate in the granulation process again, so that the uniformity of discharging is guaranteed, then the small-particle materials are blocked in front of the air channel through the non-return assembly, and therefore the particle size of the materials is reduced. The material returning mechanism is prevented from being blocked.

Description

Technical Field

[0001] This utility model relates to the field of dryer technology, and more specifically, to a cooling granulation spray dryer. Background Technology

[0002] Cooling spray granulation dryers, as highly efficient drying and granulation equipment, have been widely used in various fields such as chemical, pharmaceutical, and food industries. However, existing technologies have significant shortcomings: after the mist droplets form particles, they fall directly to the bottom of the drying tower and are discharged. Due to the varying particle sizes, some smaller particles cannot meet the usage requirements and require further screening. Moreover, the screened small particles are not effectively utilized.

[0003] The above-mentioned problems urgently need to be solved, so this utility model provides a cooling granulation spray dryer. Utility Model Content

[0004] The technical problem to be solved by this utility model is to address the issue of uneven granulation during the granulation process in a cooling spray dryer. By utilizing small particles for re-granulation, the overall quality and stability of the product can be improved while preventing small particles from entering the return material mechanism.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: a cooling granulation spray dryer is provided, including a drying tower, a cooling drying mechanism, and a return material mechanism located at the bottom of the drying tower. The drying tower is equipped with a material screening component. The return material mechanism includes a second fan, an air inlet pipe, an air distribution plate, and a check valve component located in the air inlet pipe. The check valve component includes a small ball, an air passage, a receiving part, and a support member. Small particles are screened by the material screening component to the upper end of the air distribution plate. After the second fan starts working, airflow enters the air passage, blowing the small ball to the receiving part. The small particles are blown upward and continue to be granulated. When the second fan stops working, the small ball falls into the air passage, sealing the air inlet pipe.

[0006] Preferably, the drying tower includes a main body, the main body includes a discharge port located on the bottom side of the main body, the material screening component includes a screening plate with a material passage hole, after the mother liquor is sprayed down from the top of the main body, the cooling and drying mechanism dries and granulates the mother liquor, large particles are screened by the screening plate and discharged from the main body through the discharge port, small particles fall into the bottom of the main body through the material passage hole, and the return material mechanism blows the small particles upward and continues to granulate.

[0007] Preferably, the main body has a feed inlet at the top and a material collection plate at the bottom. Small particles screened by the screening plate fall onto the material collection plate. The material collection plate is inclined toward the return mechanism and collects the small particles at the bottom of the drying tower near the return mechanism.

[0008] Preferably, the material screening assembly further includes a partition plate, which is fixedly connected to the screening plate. The screening plate is located on one side of the partition plate, and the material return mechanism is located on the other side of the partition plate.

[0009] Preferably, the cooling and drying mechanism includes a first fan, an air inlet pipe and an air outlet pipe disposed inside the main body, wherein the first fan blows air into the air inlet pipe, and the air inlet pipe distributes the airflow to the air outlet pipe.

[0010] Preferably, the vent pipe includes a first vent pipe, a second vent pipe, and a third vent pipe, wherein the first vent pipe, the second vent pipe, and the third vent pipe are arranged at unequal intervals.

[0011] Preferably, the distance between the first vent pipe and the second vent pipe is greater than the distance between the second vent pipe and the third vent pipe.

[0012] Preferably, the first, second, and third air outlet pipes are provided with air outlet holes, and airflow is sprayed out through the air outlet holes to dry the material.

[0013] Preferably, the air distribution plate is provided with air passage holes evenly distributed on it. The air distribution plate is made of flexible material, and the air passage holes have a cross-shaped structure to prevent materials from entering the air inlet pipe.

[0014] Preferably, the dryer is provided with a mother liquor feeding mechanism, which includes a mother liquor tank, a feeding pump, a feeding pipe and an atomizing nozzle. The mother liquor is pumped into the top of the main body by the feeding pump and sprayed out by the atomizing nozzle.

[0015] The beneficial effects of this utility model are as follows: The cooling granulation spray dryer of this utility model screens materials by setting up a material screening component and a return material mechanism, discharges materials that meet the particle size, and returns materials with smaller particle sizes to participate in the granulation process again, thereby ensuring the uniformity of the output. Then, the check valve component blocks small particles in front of the air passage to avoid clogging the return material mechanism. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] In the picture: Figure 1 This is a schematic diagram of the structure of the cooling granulation spray dryer of this utility model;

[0018] Figure 2 for Figure 1 Front view of the medium dryer;

[0019] Figure 3 for Figure 1 Top view of the medium dryer;

[0020] Figure 4 for Figure 3 A cross-sectional view of the medium dryer along section line AA;

[0021] Figure 5 for Figure 4 A magnified view of part A in the image;

[0022] Figure 6 for Figure 4 A schematic diagram of the abort return component;

[0023] Figure 7 for Figure 6 A three-dimensional cross-sectional view of the air intake component;

[0024] Figure 8 for Figure 6 A three-dimensional cross-sectional view of the stop-airflow assembly when the air intake is stopped.

[0025] 100. Dryer; 1. Drying tower; 11. Main body; 111. Feed inlet; 112. Discharge outlet; 113. Material collection plate; 12. Material screening assembly; 121. Screen plate; 1211. Material passage hole; 122. Divider plate; 13. Air outlet pipe.

[0026] 2. Cooling and drying mechanism; 21. First fan; 22. Main air inlet pipe; 23. Air outlet pipe; 231. First air outlet pipe; 232. Second air outlet pipe; 233. Third air outlet pipe; 234. Air outlet;

[0027] 3. Material return mechanism; 31. Second fan; 32. Air inlet pipe; 33. Air distribution plate; 331. Air passage; 34. Check valve assembly; 341. Small ball; 342. Air passage; 343. Receiving part; 344. Support component;

[0028] 4. Mother liquor feeding mechanism; 41. Mother liquor tank; 42. Feed pump; 43. Feed pipe; 44. Atomizing nozzle. Detailed Implementation

[0029] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, the present utility model will now be described in detail with reference to the accompanying drawings. This drawing is a simplified schematic diagram, illustrating only the basic aspects of the present utility model, and therefore only shows the components relevant to the present utility model. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0030] like Figure 1 , 4 As shown, this utility model provides a cooling granulation spray dryer. The dryer 100 includes a drying tower 1, a cooling drying mechanism 2, and a material return mechanism 3 located at the bottom of the drying tower 1.

[0031] like Figure 2 , 4 As shown, the drying tower 1 includes a main body 11, a material screening assembly 12 disposed inside the main body 11, and an air outlet pipe 13.

[0032] The main body 11 includes a feed inlet 111 at the top of the main body 11, a discharge outlet 112 at the bottom side of the main body 11, and a material collection plate 113 at the bottom of the main body 11. The material collection plate 113 is inclined toward the return material mechanism 3 and collects small particulate materials at the bottom of the drying tower 1 near the return material mechanism 3.

[0033] The material screening assembly 12 includes a screening plate 121 and a partition plate 122. The screening plate 121 has a material passage hole 1211 and is located next to the discharge port 112.

[0034] The partition plate 122 is fixedly connected to the screen plate 121. The screen plate 121 is located on one side of the partition plate 122, and the return mechanism 3 is located on the other side of the partition plate 122.

[0035] After the mother liquor is sprayed down from the top of the main body 11, the cooling and drying mechanism 2 dries and granulates the mother liquor. Large particles are screened by the screen plate 121 and discharged from the main body 11 through the discharge port 112. Small particles screened by the screen plate 121 fall onto the collection plate 113. Small particles fall into the bottom of the main body 11 through the material hole 1211. The return material mechanism 3 blows the small particles upward and continues to granulate.

[0036] The air outlet duct 13 is located at the upper end of the main body 11 and is connected to the bag filter (not shown in the figure).

[0037] like Figure 2-4As shown, the cooling and drying mechanism 2 includes a first fan 21, an air inlet pipe 22 located inside the main body 11, and an air outlet pipe 23. The first fan 21 blows air into the air inlet pipe 22, and then the air inlet pipe 22 distributes the airflow to the air outlet pipe 23.

[0038] The air outlet pipe 23 includes a first air outlet pipe 231, a second air outlet pipe 232 and a third air outlet pipe 233. The first air outlet pipe 231, the second air outlet pipe 232 and the third air outlet pipe 233 are arranged at unequal intervals. The cooling and drying mechanism 2 adopts the air outlet pipes 23 arranged at unequal intervals, which can distribute the airflow more evenly, improve the drying efficiency and ensure that the particles are dried evenly.

[0039] The first air outlet pipe 231, the second air outlet pipe 232, and the third air outlet pipe 233 are provided with air outlet holes 234, and the airflow is sprayed out through the air outlet holes 234 to dry the material.

[0040] In this embodiment, specifically: the distance between the first vent pipe 231 and the second vent pipe 232 is greater than the distance between the second vent pipe 232 and the third vent pipe 233.

[0041] like Figure 3 , 4 As shown, the return material mechanism 3 includes a second blower 31, an air inlet pipe 32, an air distribution plate 33, and a check valve assembly 34 disposed in the air inlet pipe 32. The second blower 31 blows air into the air inlet pipe 32, and the air distribution plate 33 sprays the airflow to the bottom of the main body 11, blowing the small particles of material upward.

[0042] like Figure 4 , Figure 6 , Figure 7 As shown, the check valve assembly 34 includes a small ball 341, an air passage 342, a receiving part 343, and a support member 344. Small particles are screened by the material screening assembly 12 to the upper end of the air distribution plate 33. After the second blower 31 starts working, air flows into the air passage 342, blowing the small ball 341 to the receiving part 343. The small particles are blown upward and continue to be granulated. When the second blower 31 stops working, the small ball 341 falls into the air passage 342, sealing the air inlet pipe 32.

[0043] The air distribution plate 33 is evenly provided with air passage holes 331. The air distribution plate 33 is made of flexible material, and the air passage holes 331 have a cross-shaped structure to prevent materials from entering the air inlet pipe 32.

[0044] like Figure 3-4 As shown, the dryer 100 is equipped with a mother liquor feeding mechanism 4, which includes a mother liquor tank 41, a feed pump 42, a feed pipe 43, and an atomizing nozzle 44. The mother liquor is pumped into the top of the main body 11 by the feed pump 42, and the atomizing nozzle 44 sprays the mother liquor out.

[0045] The working process of a cooling granulation spray dryer according to this utility model:

[0046] The cooling and drying unit 2 dries and granulates the sprayed mother liquor. The first blower 21 blows air into the main air inlet pipe 22. After the airflow is distributed through the outlet pipe 23, it is sprayed out from the outlet hole 234, contacting the droplets and causing the water in the droplets to evaporate, forming dry granules. The dried granules are then screened by the material screening component 12. Large particles are screened through the screening plate 121 and discharged from the discharge port 112 of the drying tower 1. Small particles fall into the collection plate 113 through the material passage hole 1211. The collection plate 113 collects the small particles onto the cloth. On the air plate 33, after the second fan 31 starts working, the airflow enters the air passage 342, blowing the small ball 341 to the receiving part 343, blowing the small particles upward and continuing to granulate. The airflow is sprayed out through the air passage 331 of the air distribution plate 33, blowing the small particles and causing them to re-enter the drying tower 1 for granulation. After multiple cycles, the small particles gradually grow larger and finally reach the required particle size and are discharged from the discharge port 112. When the second fan 31 stops working, the small ball 341 falls into the air passage 342 and seals the air inlet pipe 32.

[0047] The beneficial effects of this utility model of a cooling granulation spray dryer are as follows:

[0048] 1. Small particles are blocked in front of the air passage 342 by the check valve component 34 to avoid clogging the return material mechanism 3.

[0049] 2. Through the cooperation of the material screening component 12 and the return mechanism 3, it is ensured that only particles that meet the particle size requirements can be discharged, which improves the uniformity and consistency of the output. Through multiple cyclic granulation, the physical and chemical properties of the particles are more stable, thus improving the overall quality of the product.

[0050] 2. Small particles are recycled through the return material mechanism 3, which reduces production costs, improves product quality and stability, and meets the industrial production demand for efficient, energy-saving and environmentally friendly drying and granulation equipment. The equipment has built-in screening and return functions, eliminating the need for additional transportation to screening equipment, reducing operation steps and improving production efficiency.

[0051] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0052] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0053] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the scope of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A cooling granulation spray dryer, characterized in that: The dryer (100) includes a drying tower (1), a cooling and drying mechanism (2), and a return material mechanism (3) located at the bottom of the drying tower (1). The drying tower (1) is equipped with a material screening assembly (12). The return material mechanism (3) includes a second fan (31), an air inlet pipe (32), an air distribution plate (33), and a check valve assembly (34) located in the air inlet pipe (32). The check valve assembly (34) includes a small ball (341), an air passage (342), and a receiving part (343). The material is screened by the material screening component (12) to the upper end of the air distribution plate (33). After the second fan (31) starts working, the airflow enters the air passage (342) and blows the small ball (341) to the receiving part (343). The small particle material is blown upward and continues to be granulated. When the second fan (31) stops working, the small ball (341) falls into the air passage (342) and closes the air inlet pipe (32).

2. The cooling granulation spray dryer according to claim 1, characterized in that: The drying tower (1) includes a main body (11), the main body (11) includes a discharge port (112) located on the bottom side of the main body (11), the material screening component (12) includes a screening plate (121), the screening plate (121) has a material passage hole (1211), after the mother liquor is sprayed down from the top of the main body (11), the cooling and drying mechanism (2) dries and granulates the mother liquor, the large particles are screened by the screening plate (121) and discharged from the main body (11) through the discharge port (112), the small particles fall into the bottom of the main body (11) through the material passage hole (1211), and the return material mechanism (3) blows the small particles upward and continues to granulate.

3. The cooling granulation spray dryer according to claim 2, characterized in that: The main body (11) is provided with a feed inlet (111) at the top and a material collection plate (113) at the bottom. Small particles after being screened by the screening plate (121) fall onto the material collection plate (113). The material collection plate (113) is inclined toward the return material mechanism (3). The material collection plate (113) collects small particles of material at the bottom of the drying tower (1) near the return material mechanism (3).

4. The cooling granulation spray dryer according to claim 2, characterized in that: The material screening assembly (12) further includes a partition plate (122), which is fixedly connected to the screening plate (121). The screening plate (121) is located on one side of the partition plate (122), and the return material mechanism (3) is located on the other side of the partition plate (122).

5. The cooling granulation spray dryer according to claim 2, characterized in that: The cooling and drying mechanism (2) includes a first fan (21), an air intake pipe (22) located inside the main body (11), and an air outlet pipe (23). The first fan (21) blows air into the air intake pipe (22), and the air intake pipe (22) distributes the airflow to the air outlet pipe (23).

6. The cooling granulation spray dryer according to claim 5, characterized in that: The vent pipe (23) includes a first vent pipe (231), a second vent pipe (232) and a third vent pipe (233), which are arranged at unequal intervals.

7. The cooling granulation spray dryer according to claim 6, characterized in that: The distance between the first vent pipe (231) and the second vent pipe (232) is greater than the distance between the second vent pipe (232) and the third vent pipe (233).

8. The cooling granulation spray dryer according to claim 6, characterized in that: The first air outlet pipe (231), the second air outlet pipe (232), and the third air outlet pipe (233) are provided with air outlet holes (234), and the airflow is sprayed out through the air outlet holes (234) to dry the material.

9. The cooling granulation spray dryer according to claim 1, characterized in that: The air distribution plate (33) is uniformly provided with air passage holes (331). The air distribution plate (33) is made of flexible material, and the air passage holes (331) have a cross-shaped structure to prevent materials from entering the air inlet pipe (32).

10. The cooling granulation spray dryer according to claim 2, characterized in that: The dryer (100) is provided with a mother liquor feeding mechanism (4), which includes a mother liquor tank (41), a feeding pump (42), a feeding pipe (43) and an atomizing nozzle (44). The liquid is pumped into the top of the main body (11) by the feeding pump (42), and the atomizing nozzle (44) sprays the liquid out.

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