Spray-drying atomizer

Abstract

The utility model relates to the field of atomizer, specifically disclose spray drying atomizer, including drying mechanism main part, drying mechanism main part includes: spray drying tower, air outlet pipe, hot -blast air inlet pipe, the upper portion of spray drying tower is provided with motor, the lower end of motor is installed with atomizer, the outside of atomizer is located the upper surface of spray drying tower and is installed with mounting backing plate, the upper surface of spray drying tower is installed with liquid feed pipe on one side of motor, the upper surface of spray drying tower is installed with high pressure gas injection pipe on the other side of motor. Through the high pressure gas injection pipe of setting introduction high pressure air to the inside of spray drying tower, high pressure air auxiliary atomization significantly speeds up the droplet surface moisture evaporation speed, air can carry out secondary shearing to droplet, significantly improve atomization uniformity and drying efficiency, greatly shorten drying time, effectively guarantee the product quality of heat sensitivity, easy oxidizable material.

Description

Technical Field

[0001] This utility model relates to the field of atomizers, specifically a spray drying atomizer. Background Technology

[0002] Spray drying is a technology that rapidly dries liquid materials by dispersing them into tiny droplets and exposing them to hot air, causing the moisture to evaporate quickly. It is widely used in the food, pharmaceutical, and chemical industries. The basic principle of spray drying is to use an atomizer to disperse liquid materials into fine droplets, increasing the contact surface area between the material and hot air, allowing the moisture to evaporate rapidly and completing the drying process in a short time. The entire process mainly includes the following steps: atomization, heat exchange, and collection. By atomizing the liquid material and exposing it to hot air, the moisture is rapidly vaporized, and a dried product is obtained. In a spray drying system, the atomizer is the core component, and its performance directly determines the atomization effect and overall drying efficiency. Currently, most mechanical atomizers use high-pressure pumps to pump the material into the atomizer for internal processing.

[0003] However, for materials with high viscosity or high solid content, current mechanical atomization methods may not be able to achieve sufficient breakage with simple rotational force, resulting in poor atomization drying effect. Utility Model Content

[0004] In view of the shortcomings of the prior art, this utility model provides a spray drying atomizer, which solves the problems mentioned in the background.

[0005] This utility model provides the following technical solution: a spray drying atomizer, including a drying mechanism body, the drying mechanism body including: a spray drying tower, an air outlet, and a hot air inlet pipe, a motor is arranged above the spray drying tower, an atomizer is installed at the lower end of the motor, an mounting plate is installed on the outer side of the atomizer on the upper surface of the spray drying tower, an atomizing nozzle is opened on the outer side of the lower end of the atomizer, a liquid feed pipe is installed on one side of the motor on the upper surface of the spray drying tower, and a high-pressure air injection pipe is installed on the other side of the motor on the upper surface of the spray drying tower.

[0006] As a further embodiment of this utility model: a hot air inlet pipe is installed below the high-pressure air injection pipe on the outside of the spray drying tower, an air outlet is installed below the liquid feed pipe on the outside of the spray drying tower, and a powder outlet is installed on the lower surface of the spray drying tower.

[0007] As a further improvement of this utility model, the upper surface of the spray drying tower is provided with mounting holes whose inner diameter is smaller than the outer diameter of the mounting pad.

[0008] As a further improvement of this utility model, both the liquid feed pipe and the high-pressure gas injection pipe are connected to the spray drying tower.

[0009] As a further improvement of this utility model, the hot air inlet pipe is connected to an external heating air source.

[0010] As a further improvement of this utility model, both the air outlet and the powder outlet are connected to the spray drying tower.

[0011] As a further improvement of this utility model, the high-pressure gas injection pipe is connected to an external high-pressure gas source.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. High-pressure air is introduced into the spray drying tower through a high-pressure air injection pipe. The high-pressure air assists atomization, which significantly accelerates the evaporation rate of moisture on the droplet surface. The air can perform secondary shearing on the droplets, which significantly improves the atomization uniformity and drying efficiency, greatly shortens the drying time, and effectively ensures the product quality of heat-sensitive and easily oxidized materials. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a spray dryer atomizer;

[0015] Figure 2 This is a cross-sectional view of the main body of the drying mechanism in a spray dryer atomizer;

[0016] Figure 3 This is a schematic diagram of the atomizer in a spray dryer atomizer.

[0017] In the diagram: 1. Main body of the drying mechanism; 2. Spray drying tower; 3. Air outlet; 4. Hot air inlet pipe; 5. Powder outlet; 6. Liquid inlet pipe; 7. High-pressure air injection pipe; 8. Motor; 801. Atomizer; 802. Atomizing nozzle; 803. Mounting pad. Detailed Implementation

[0018] 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.

[0019] like Figure 1-3As shown, this embodiment provides a spray drying atomizer, including a drying mechanism body 1. The drying mechanism body 1 includes: a spray drying tower 2, an air outlet 3, and a hot air inlet 4. A motor 8 is installed above the spray drying tower 2, and an atomizer 801 is installed at the lower end of the motor 8. An installation pad 803 is installed on the outer side of the atomizer 801 on the upper surface of the spray drying tower 2. An installation hole with an inner diameter smaller than the outer diameter of the installation pad 803 is opened on the upper surface of the spray drying tower 2. An atomizing nozzle 802 is opened on the outer side of the lower end of the atomizer 801. A liquid feed pipe 6 is installed on one side of the motor 8 on the upper surface of the spray drying tower 2, and a high-pressure air injection pipe 7 is installed on the other side of the motor 8 on the upper surface of the spray drying tower 2. The high-pressure air injection pipe 7 is connected to a high-pressure air source. Both the liquid feed pipe 6 and the high-pressure air injection pipe 7 are connected to the spray drying tower 2 and pass through the motor 8. The atomizer 801 operates by high-speed rotation to achieve centrifugal atomization of the liquid. Simultaneously, high-pressure air introduced through the high-pressure air injection pipe 7 can perform secondary shearing on the droplets, significantly reducing the average particle size and greatly improving atomization uniformity and drying efficiency. When processing liquids with high solid content, the high-pressure air can effectively reduce material accumulation and maintain stable atomization performance by continuously blowing the surface of the atomizing nozzle 802 and atomizing disc, thus addressing the issues of material adhesion and efficiency reduction that often occur. Below the high-pressure air injection pipe 7, a hot air inlet pipe 4 is installed on the outside of the spray drying tower 2. The hot air inlet pipe 4 is connected to a heating air source. Below the liquid feed pipe 6, an air outlet 3 is installed on the outside of the spray drying tower 2. A powder outlet 5 is installed on the lower surface of the spray drying tower 2. The air outlet 3, the hot air inlet pipe 4, and the powder outlet 5 are all connected to the spray drying tower 2.

[0020] The working principle of this utility model is as follows: During assembly, when the atomizing nozzle 802 on the outside of the atomizer 801 is installed in the reserved hole on the upper surface of the spray drying tower 2, the installation process and quality control standards need to be precisely controlled to ensure that the reserved hole of the spray drying tower 2 and the atomizer 801 achieve a tight and precise fit, eliminating problems such as air leakage and uneven droplet diffusion caused by size mismatch. When the motor 8 drives the atomizer 801 to rotate at high speed for atomization, the atomizer 801 achieves centrifugal atomization of the liquid through high-speed rotation (5000-50000 RPM). However, for materials with high viscosity or high solid content, simple rotational force may not be enough to achieve sufficient atomization. Therefore, when the high-pressure air injection pipe 7 is connected... The high-pressure air inside the spray drying tower 2 performs secondary shearing on the droplets, significantly reducing the average particle size from 50μm to 10-20μm, thereby significantly improving atomization uniformity and drying efficiency. At the same time, the high-pressure air can blow the surface of the atomizing nozzle 802 and the atomizing disc in real time, effectively reducing material accumulation and maintaining stable atomization performance. If the droplets generated by the atomizing nozzle 802 diffuse naturally during operation, it is easy to cause the inner wall of the spray drying tower 2 to stick, affecting the drying efficiency. At this time, the high-pressure air injection pipe 7 is connected to the high-pressure air (secondary air). Under the guidance of the reserved hole of the modified spray drying tower 2, the atomization direction can be precisely controlled, which promotes the uniform dispersion of droplets in the drying tower and greatly improves the contact efficiency between hot air and materials.

[0021] In summary, the above are merely preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A spray drying atomizer, comprising a drying mechanism body (1), characterized in that, The main body (1) of the drying mechanism includes: a spray drying tower (2), an air outlet (3), and a hot air inlet pipe (4). A motor (8) is installed above the spray drying tower (2). An atomizer (801) is installed at the lower end of the motor (8). An installation pad (803) is installed on the outer side of the atomizer (801) on the upper surface of the spray drying tower (2). An atomizing nozzle (802) is opened on the outer side of the lower end of the atomizer (801). A liquid feed pipe (6) is installed on one side of the motor (8) on the upper surface of the spray drying tower (2). A high-pressure air injection pipe (7) is installed on the other side of the motor (8) on the upper surface of the spray drying tower (2).

2. The spray drying atomizer according to claim 1, characterized in that, A hot air inlet pipe (4) is installed below the high-pressure air injection pipe (7) on the outside of the spray drying tower (2), an air outlet (3) is installed below the liquid feed pipe (6) on the outside of the spray drying tower (2), and a powder outlet (5) is installed on the lower surface of the spray drying tower (2).

3. The spray drying atomizer according to claim 1, characterized in that, The upper surface of the spray drying tower (2) is provided with mounting holes with an inner diameter smaller than the outer diameter of the mounting pad (803).

4. The spray drying atomizer according to claim 1, characterized in that, The liquid feed pipe (6) and the high-pressure gas injection pipe (7) are both connected to the spray drying tower (2).

5. The spray drying atomizer according to claim 2, characterized in that, The hot air inlet pipe (4) is connected to an external heating air source.

6. The spray drying atomizer according to claim 2, characterized in that, The air outlet (3), hot air inlet (4) and powder outlet (5) are all connected to the spray drying tower (2).

7. The spray drying atomizer according to claim 1, characterized in that, The high-pressure gas injection pipe (7) is connected to an external high-pressure gas source.

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