Centrifugal spray dryer with vortex guide mechanism

Abstract

The utility model relates to the technical field of drying machine, and disclose centrifugal spray drier with scroll type flow guide mechanism, including drying box body, the inside upper position of drying box body is provided with the mounting hole, the inside of mounting hole is installed with the mounting block through the connecting bolt, the bottom of mounting block is installed with centrifugal atomizer through fixed bolt, the inside of drying box body and the outer ring of surrounding mounting block is provided with the air delivery chamber, the inside upper position of drying box body is provided with annular air flue, the inner wall of annular air flue is fixedly connected with a plurality of pieces of flow vane no.

Description

Technical Field

[0001] This utility model relates to the field of dryer technology, specifically to a centrifugal spray dryer with a vortex-type flow guiding mechanism. Background Technology

[0002] Concrete additives require a drying process during production to improve their performance and stability. Centrifugal spray dryers use high-speed centrifugal force to disperse liquid into droplets, which then come into full contact with hot air to achieve instant drying. This fast drying speed avoids damage to the active ingredients of concrete additives and ensures that the dried additive powder has good dispersibility, flowability, and solubility.

[0003] A search revealed a Chinese patent for a centrifugal spray dryer with uniform drying properties, publication number CN214620305U, which includes a dryer body; four support legs are symmetrically connected to the bottom outer side of the dryer body by welding; and a discharge pipe is fixedly connected to the bottom of the dryer body.

[0004] The above-mentioned spray dryer, with its solid conical guide seat, helps to improve the drying effect. The hot air sprayed from the air outlet nozzle at the bottom of the first air outlet ring will first come into contact with the sprayed mist droplets and push the mist droplets to drift obliquely downward along the outside of the guide seat. The hot air sprayed from the air outlet nozzle at the top of the second air outlet ring will form a convection airflow with the hot air sprayed from the air outlet nozzle at the bottom of the first air outlet ring, resulting in more uniform drying. However, although multiple jet heads can create convective airflow, the airflow is still a direct-blowing intake. The contact area and contact time between hot air and droplets are limited, the moisture evaporation rate is slow, which affects the processing efficiency. In addition, the conical guide seat structure is relatively simple, and the raw material may stick to its surface when atomized, making cleaning difficult. Utility Model Content

[0005] The purpose of this invention is to provide a centrifugal spray dryer with a vortex-type flow guiding mechanism, which can effectively solve the problems in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A centrifugal spray dryer with a vortex-type flow guiding mechanism includes a drying chamber. An installation port is provided at the upper part of the interior of the drying chamber. An installation block is installed inside the installation port by connecting bolts. A centrifugal atomizer is installed at the bottom of the installation block by fixing bolts. An air supply chamber is provided inside the drying chamber and around the outer ring of the installation block. An annular air duct is provided at the upper part of the interior of the drying chamber. Several guide vanes are fixedly connected to the inner wall of the annular air duct, and there is an installation gap between the guide vanes and the centrifugal atomizer. An air duct that cooperates with the air duct cavity is installed at the upper part of one side of the drying chamber. A feed pipe is connected to the top inlet of the centrifugal atomizer. Inside the drying chamber and below the centrifugal atomizer, a conical guide seat is installed via a support frame. A spray pipe is installed around the lower outer ring of the conical guide seat. Several spray nozzles are provided at the top of the spray pipe. Guide vanes are provided inside the spray nozzles. An air supply pipe is connected to one side of the spray pipe, and the end of the air supply pipe away from the spray pipe passes through the side wall of the drying chamber and extends out.

[0007] Preferably, the conical guide seat is conical in shape, and the top surface of the conical guide seat, the outer wall of the annular air duct, and the inner wall of the drying chamber are all coated with an anti-adhesion layer.

[0008] Preferably, several air nozzles are arranged at equal intervals on the air duct, with the air outlets facing upwards, and a sealing element is provided at the connection between the second air duct and the drying chamber.

[0009] Preferably, the center points of the conical guide seat, the annular air duct, and the centrifugal atomizer are on the same vertical line, and a processing gap is left between the conical guide seat and the centrifugal atomizer.

[0010] Preferably, the lower part of the drying chamber is inverted conical, and a discharge port is connected to the bottom end of the drying chamber. A connecting flange is provided at the end of the discharge port away from the drying chamber.

[0011] Preferably, the air supply chamber is connected to the annular air supply duct, and the centrifugal atomizer is detachably connected to the drying chamber via a mounting block.

[0012] Compared with the prior art, the beneficial effects of this utility model are: This invention, through the coordinated arrangement of an annular air duct, a guide vane, an air duct cavity, and an air pipe, can deliver dry hot air to the upper part of the centrifugal atomizer, and can cause the hot air to form a strong rotating vortex. The droplets sprayed from the centrifugal atomizer will fully contact the hot air under the action of centrifugal force, which facilitates the mixing effect of hot air and droplets and improves the drying efficiency.

[0013] By setting up an installation block, a centrifugal atomizer, and a feeding pipe, the centrifugal atomizer can be removed for maintenance. The conical guide seat guides the movement of the droplets, and rotating hot air is continuously sprayed from the nozzle to reheat the droplets, thereby improving the drying effect. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the centrifugal spray dryer with a vortex-type flow guiding mechanism in an embodiment of this utility model; Figure 2 This is a schematic diagram of the structure of the conical guide seat, air nozzle, and air delivery cavity in the embodiment of this utility model; Figure 3 This is a top view of the structure of the guide vane and the centrifugal atomizer in the embodiment of this utility model; Figure 4 This is a cross-sectional view of the connection between the air pipe and the air nozzle in an embodiment of this utility model.

[0015] In the diagram: 1. Drying chamber; 2. Mounting block; 3. Centrifugal atomizer; 4. Feed pipe; 5. Annular air duct; 6. Guide vane one; 7. Air chamber; 8. Air duct one; 9. Conical guide seat; 10. Air spray pipe; 11. Air duct two; 12. Air nozzle; 13. Guide vane two; 14. Discharge port. Detailed Implementation

[0016] 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.

[0017] Example 1

[0018] Combination Figures 1-4 A centrifugal spray dryer with a vortex-type flow guiding mechanism includes a drying chamber 1. An installation port is provided at the upper position inside the drying chamber 1. An installation block 2 is installed inside the installation port by connecting bolts. A centrifugal atomizer 3 is installed at the bottom of the installation block 2 by fixing bolts. An air supply chamber 7 is provided inside the drying chamber 1 and around the outer ring of the installation block 2.

[0019] See Figure 2 and Figure 3 Furthermore, an annular air duct 5 is provided at the upper part of the interior of the drying chamber 1. Several guide vanes 6 are fixedly connected to the inner wall of the annular air duct 5, and there is an installation gap between the guide vanes 6 and the centrifugal atomizer 3. An air duct 8 that cooperates with the air duct chamber 7 is installed at the upper part of one side of the drying chamber 1. The top inlet of the centrifugal atomizer 3 is connected to the feed pipe 4. The lower part of the drying chamber 1 is set in an inverted cone shape. The bottom end of the drying chamber 1 is connected to the discharge port 14. A connecting flange is provided at the end of the discharge port 14 away from the drying chamber 1. The air duct chamber 7 is connected to the annular air duct 5, and the centrifugal atomizer 3 is detachably connected to the drying chamber 1 through the mounting block 2.

[0020] Specifically, air supply pipe 8 and air supply pipe 11 can be connected to the outlet of an external hot air blower as needed to deliver hot air to the interior of the drying chamber 1 according to existing technology. When the temperature inside the drying chamber 1 reaches the drying standard, the centrifugal atomizer 3 can be activated according to existing technology to continuously spray mist into the drying chamber 1. At this time, the hot air is guided into the drying chamber 1 by the guide vanes 6 to rotate and form a vortex airflow. The centrifugal force generated by the vortex airflow will drive the mist to fully contact the hot air to increase the water evaporation efficiency and improve the processing efficiency. The centrifugal atomizer 3 is installed on the mounting block 2 by fixing bolts, and the mounting block 2 is installed on the drying chamber 1 by connecting bolts. After long-term use, the centrifugal atomizer 3 can be removed to maintain or replace the nozzle of the centrifugal atomizer 3.

[0021] Example 2 See Figure 2 and Figure 4 Furthermore, based on Embodiment 1, a conical guide seat 9 is installed inside the drying chamber 1 and below the centrifugal atomizer 3 via a support frame. An air spray pipe 10 is installed around the lower outer ring of the conical guide seat 9. Several air nozzles 12 are provided at the top of the air spray pipe 10, and guide vanes 13 are provided inside the air nozzles 12. An air supply pipe 11 is connected to one side of the air spray pipe 10, and the end of the air supply pipe 11 away from the air spray pipe 10 penetrates the side wall of the drying chamber 1 and extends... The conical guide seat 9 is conical in shape. The top surface of the conical guide seat 9, the outer wall of the annular air duct 5, and the inner wall of the drying chamber 1 are all coated with an anti-adhesion layer. Several air nozzles 12 are arranged at equal intervals on the air duct 10, and the air outlets of the air nozzles 12 face upwards. A sealing element is provided at the connection between the air duct 11 and the drying chamber 1. The center points of the conical guide seat 9, the annular air duct 5, and the centrifugal atomizer 3 are on the same vertical line, and a processing gap is left between the conical guide seat 9 and the centrifugal atomizer 3.

[0022] Specifically, when the droplets are driven downward by the airflow ejected from the annular air duct 5, the direction of the droplets' drift can be guided by the conical guide seat 9 to slow down their falling efficiency. Several air nozzles 12 are provided below the air pipe 10. By ejecting rotating hot air from the air nozzles 12, the downward-flowing droplets can be dispersed for secondary drying. During processing, the material conveying pipe 4 can be connected to the feed port of the external cyclone separator as needed to remove the dried material.

[0023] In actual operation, air supply pipe 8 and air supply pipe 11 can be connected to the air outlet of the external hot air blower as needed, so that hot air can be delivered to the interior of the drying chamber 1 according to the existing technology. When the temperature inside the drying chamber 1 reaches the drying standard, the centrifugal atomizer 3 can be started according to the existing technology to continuously spray mist droplets into the drying chamber 1. At this time, the hot air input enters the drying chamber 1 through the guide vane 6 to rotate and form a vortex airflow. The centrifugal force generated by the vortex airflow will drive the mist droplets to fully contact the hot air to increase the moisture evaporation efficiency and improve the processing efficiency. The centrifugal atomizer 3 is mounted on the mounting block 2 by fixing bolts, and the mounting block 2 is mounted on the drying chamber 1 by connecting bolts. After long-term use, the centrifugal atomizer 3 can be removed to maintain or replace the nozzle of the centrifugal atomizer 3. When the droplets are driven downward by the airflow ejected from the annular air duct 5, the direction of the droplets' drift can be guided by the conical guide seat 9 to slow down their falling efficiency. Several air nozzles 12 are provided below the air pipe 10. The downward-flowing droplets can be dispersed by the rotating hot air ejected from the air nozzles 12 for secondary drying. During processing, the material conveying pipe 4 can be connected to the feed port of the external cyclone separator as needed to remove the dried material.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A centrifugal spray dryer with a vortex-type flow guiding mechanism, comprising a drying chamber (1), wherein an installation port is provided at the upper position inside the drying chamber (1), and an installation block (2) is installed inside the installation port by connecting bolts, and a centrifugal atomizer (3) is installed at the bottom end of the installation block (2) by fixing bolts, characterized in that: An air supply chamber (7) is provided inside the drying chamber (1) and around the outer ring of the mounting block (2); An annular air duct (5) is provided at the upper part of the interior of the drying chamber (1). Several guide vanes (6) are fixedly connected to the inner wall of the annular air duct (5), and there is an installation gap between the guide vanes (6) and the centrifugal atomizer (3). An air duct (8) that cooperates with the air duct cavity (7) is installed at the upper part of one side of the drying chamber (1). A feed pipe (4) is connected to the top feed port of the centrifugal atomizer (3). Inside the drying chamber (1) and below the centrifugal atomizer (3), a conical guide seat (9) is installed via a support frame. A spray pipe (10) is installed around the lower part of the outer ring of the conical guide seat (9). Several spray nozzles (12) are provided at the top of the spray pipe (10). A second guide vane (13) is provided inside the spray nozzle (12). A second air supply pipe (11) is connected to one side of the spray pipe (10), and the end of the second air supply pipe (11) away from the spray pipe (10) passes through the side wall of the drying chamber (1) and extends out.

2. The centrifugal spray dryer with a vortex-type flow guiding mechanism according to claim 1, characterized in that: The conical guide seat (9) is conical in shape, and the top surface of the conical guide seat (9), the outer wall of the annular air duct (5) and the inner wall of the drying box (1) are all coated with an anti-adhesion layer.

3. The centrifugal spray dryer with a vortex-type flow guiding mechanism according to claim 1, characterized in that: Several air nozzles (12) are arranged at equal intervals on the air pipe (10), and the air outlets of the air nozzles (12) face upwards. A sealing element is provided at the connection between the second air pipe (11) and the drying box (1).

4. The centrifugal spray dryer with a vortex-type flow guiding mechanism according to claim 1, characterized in that: The center points of the conical guide seat (9), the annular air duct (5), and the centrifugal atomizer (3) are on the same vertical line, and there is a processing gap between the conical guide seat (9) and the centrifugal atomizer (3).

5. The centrifugal spray dryer with a vortex-type flow guiding mechanism according to claim 1, characterized in that: The lower part of the drying chamber (1) is inverted conical, and the bottom end of the drying chamber (1) is connected to a discharge port (14). A connecting flange is provided at the end of the discharge port (14) away from the drying chamber (1).

6. The centrifugal spray dryer with a vortex-type flow guiding mechanism according to claim 1, characterized in that: The air supply chamber (7) is connected to the annular air supply duct (5), and the centrifugal atomizer (3) is detachably connected to the drying box (1) through the mounting block (2).

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