A spray mechanism for a spray drying tower

Abstract

This utility model discloses a spray mechanism for a spray drying tower, relating to the field of spray drying tower technology. The spray mechanism includes a motor and a centrifugal disc connected to the motor's output end. It also includes a flow guiding device vertically positioned in the center of the centrifugal disc. The flow guiding device has a first through-hole vertically formed inside and multiple second through-holes formed on its outer side, all of which communicate with the first through-hole. A liquid inlet pipe is connected to the lower end of the first through-hole. Multiple circular holes are formed on the outer surface of the centrifugal disc. By adding a flow guiding device and forming a first and multiple second through-holes inside it, along with an arc-shaped flow guide groove design, this utility model achieves uniform distribution of the liquid to be atomized, significantly improving the droplet size distribution during atomization, resulting in more uniform atomization and improved drying efficiency.

Description

Technical Field

[0001] This utility model relates to the field of spray drying tower technology, specifically to a spray mechanism for a spray drying tower. Background Technology

[0002] Spray drying towers, as highly efficient drying equipment, are widely used in fields such as biopesticides, pharmaceuticals, and food microbiology. Their core function lies in rapidly dispersing liquid raw materials into fine droplets through an atomization mechanism, which then transfers heat and mass with hot air to ultimately obtain dried powder. The performance of the atomization mechanism directly affects drying efficiency, product particle size distribution, and energy consumption. Currently, mainstream atomization technologies include centrifugal atomization, pressure atomization, and two-fluid atomization, with centrifugal atomizers being widely adopted due to their simple structure and large processing capacity. The spray mechanism disclosed in utility model patent CN222324250U achieves secondary dispersion of droplets through a combination of external spray holes on a centrifugal disc and a cutting blade. However, its flow guiding structure uses only simple through holes, failing to consider the uniform distribution of liquid flow within the centrifugal disc. This results in a wide droplet size distribution range and low drying efficiency during atomization. Furthermore, the position of the cutting blade is only simply "fitted" to the external spray holes, without considering the power source for secondary atomization. In actual operation, insufficient centrifugal power leads to poor cutting effect, resulting in uneven droplet size distribution after atomization. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a spray mechanism for a spray drying tower that can spray out atomized droplets with uniform particle size.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A spray mechanism for a spray drying tower includes a motor and a centrifugal disc connected to the output end of the motor. It also includes a flow guiding device vertically disposed in the middle of the centrifugal disc. The flow guiding device has a first through hole vertically opened inside and multiple second through holes opened on the outside of the flow guiding device. The multiple second through holes are all connected to the first through hole, and the lower end of the first through hole is connected to a liquid inlet pipe. Multiple round holes are opened on the outer surface of the centrifugal disc.

[0006] Furthermore, the second through hole is connected to the first through hole through a guide groove, which is arc-shaped.

[0007] Furthermore, the guide channel is cylindrical, and the vertical cross-sectional diameter of the guide channel gradually decreases towards the second through hole.

[0008] Furthermore, the lower end of the flow guiding device is connected to a rotary joint, and the liquid inlet pipe is connected to the first through hole in the flow guiding device through the rotary joint.

[0009] Furthermore, the circular hole on the side of the centrifuge disc is a horn shape that protrudes outward, and a high-pressure air pipe is installed on the side of the circular hole. The port of the high-pressure air pipe is oriented at a 30-60° angle to the port of the circular hole. The rotary joint is a multi-channel rotary joint, and the high-pressure air pipe is connected to an external air pump through the rotary joint.

[0010] Furthermore, a support plate is installed on the upper end of the motor, and mounting holes are provided on the support plate.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] (1) By adding a flow guiding device and opening a first through hole and multiple second through holes inside the flow guiding device, and with the design of an arc-shaped flow guiding groove, the present invention can achieve uniform distribution of the liquid to be atomized, thereby significantly improving the droplet size distribution during the atomization process, making the atomization effect more uniform and improving the drying efficiency.

[0013] (2) In this utility model, the round hole on the side of the centrifugal disc is a horn shape that protrudes outward and is equipped with a high-pressure air pipe. Its port is distributed at 30-60° with the port of the round hole, which effectively solves the problem of uneven atomization caused by insufficient centrifugal power in traditional technology.

[0014] (3) By setting a guide channel, and the guide channel is a circular tube with a gradually decreasing vertical cross-sectional diameter, this utility model optimizes the liquid flow path and further increases the speed at which the liquid is ejected from the guide device through the design of the diameter decreasing from large to small, effectively increasing the speed at which the liquid reaches the circular hole on the side of the centrifugal disc. Attached Figure Description

[0015] Figure 1 This is a structural diagram of the spray mechanism provided in Example 1;

[0016] Figure 2 This is a schematic cross-sectional view of the flow guiding device in Example 1;

[0017] Figure 3 This is a diagram of the circular hole structure in Example 2.

[0018] The corresponding names of the attached figures are: 1-motor, 2-centrifuge disc, 3-flow guiding device, 4-first through hole, 5-second through hole, 6-liquid inlet pipe, 7-rotary joint, 8-support plate, 9-mounting hole, 10-flow guiding groove, 11-round hole, 12-high pressure gas pipe. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments. The embodiments of the present invention include, but are not limited to, the following embodiments.

[0020] Example 1

[0021] like Figure 1 and 2 As shown, this embodiment provides a spray mechanism for a spray drying tower, including a motor 1 and a centrifugal disc 2. The output end of the motor 1 is connected to the centrifugal disc 2 to provide driving force to the centrifugal disc 2. The centrifugal disc 2 has a hollow structure and multiple round holes 11 are opened on its side. A flow guiding device 3 is vertically installed in the middle of the centrifugal disc 2. A first through hole 4 is opened inside the flow guiding device 3, and multiple second through holes 5 are evenly distributed on the outside of the flow guiding device 3. Each second through hole 5 is connected to the first through hole 4 through a flow guiding groove 10. The lower end of the first through hole 4 is connected to the liquid inlet pipe 6 through a rotary joint 7. When the motor 1 is turned on, the motor 1 drives the centrifugal disc 2 to rotate. By introducing the liquid to be atomized into the liquid inlet pipe 6, the liquid is guided into the first through hole 4 under the action of the rotary joint 7. Under the action of centrifugal force, the liquid is sprayed out at high speed from the second through hole 5 under the action of the flow guiding groove 10, and the high-speed sprayed liquid forms water droplets.

[0022] As the liquid is sprayed from the guide device 3 into the circular hole 11 of the centrifugal disk 2, the speed of the water droplets gradually decreases. When they come into contact with the side of the centrifugal disk 2, the centrifugal force decreases, causing the speed at which the droplets are ejected from the circular hole 11 to decrease, which in turn affects the secondary atomization of the water droplets and results in uneven distribution of the atomized droplet size. Therefore, in this embodiment, the guide groove 10 is designed as an arc and a circular tube, with its vertical cross-sectional diameter gradually decreasing towards the second through hole 5. This design optimizes the flow path of the liquid, reduces turbulence and energy loss, and ensures that the liquid is evenly distributed into each of the second through holes 5, thereby improving the uniformity of atomization. The design of the diameter decreasing from large to small can further increase the speed at which the liquid is ejected from the guide device, effectively increasing the speed at which the liquid reaches the circular hole on the side of the centrifugal disk, thus making the secondary atomized droplets more uniform.

[0023] During use, the device provided in this embodiment needs to be installed in the spray drying tower. Therefore, a protective cover is set outside the motor 1, and a support plate 8 is installed on the upper end of the protective cover. The support plate 8 has mounting holes 9, and the device can be fixed in the spray drying tower by setting screws in the mounting holes 9.

[0024] Example 2

[0025] Based on Example 1, the power of secondary atomization is further increased to improve the atomization effect, such as... Figure 3As shown, the circular hole 11 on the outer side of the centrifuge disc 2 is designed as a convex, funnel-shaped structure, and a high-pressure air pipe 12 is installed on the side of the circular hole 11. The ports of the high-pressure air pipe 12 are oriented at a 30-60° angle to the ports of the circular hole 11, and the rotary joint 7 is replaced with a multi-channel rotary joint, through which the high-pressure air pipe 12 is connected to an external air pump. When the centrifuge disc 2 rotates at high speed, the liquid is ejected from the second through hole 5 to form atomized droplets. At the same time, the airflow ejected from the high-pressure air pipe 12 interacts with the droplets, providing additional secondary atomization power, which can significantly reduce the droplet size and improve the atomization effect.

[0026] The above embodiments are merely one of the preferred embodiments of this utility model and should not be used to limit the scope of protection of this utility model. Any modifications or refinements made to the main design concept and spirit of this utility model that are not of substantial significance, but solve the same technical problem as this utility model, should be included within the scope of protection of this utility model.

Claims

1. A spray mechanism for a spray drying tower, comprising a motor (1) and a centrifugal disc (2) connected to the output end of the motor (1), characterized in that, It also includes a flow guiding device (3) vertically arranged in the middle of the centrifuge disc (2). The flow guiding device (3) has a first through hole (4) vertically opened inside, and multiple second through holes (5) are opened on the outside of the flow guiding device (3). The multiple second through holes (5) are all connected to the first through hole (4), and the lower end of the first through hole (4) is connected to an inlet pipe (6). Multiple round holes (11) are opened on the outer side of the centrifuge disc (2).

2. The spray mechanism of a spray drying tower according to claim 1, characterized in that, The second through hole (5) is connected to the first through hole (4) through a guide groove (10), which is arc-shaped.

3. The spray mechanism of a spray drying tower according to claim 2, characterized in that, The guide groove (10) is cylindrical, and the vertical cross-sectional diameter of the guide groove (10) gradually decreases towards the second through hole (5).

4. The spray mechanism of a spray drying tower according to claim 3, characterized in that, The lower end of the flow guiding device (3) is connected to a rotary joint (7), and the liquid inlet pipe (6) is connected to the first through hole (4) in the flow guiding device (3) through the rotary joint (7).

5. The spray mechanism of a spray drying tower according to claim 4, characterized in that, The circular hole (11) on the side of the centrifugal disc (2) is a horn-shaped protrusion, and a high-pressure air pipe (12) is installed on the side of the circular hole (11). The port of the high-pressure air pipe (12) is oriented at a 30-60° angle to the port of the circular hole (11). The rotary joint (7) is a multi-channel rotary joint, and the high-pressure air pipe (12) is connected to an external air pump through the rotary joint (7).

6. The spray mechanism of a spray drying tower according to claim 5, characterized in that, The upper end of the motor (1) is equipped with a support plate (8), and the support plate (8) has mounting holes (9).

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