Spray drying tower cyclone type exhaust gas powder recovery device

Abstract

The utility model discloses a spray drying tower cyclone type tail gas powder recovery device, including air inlet pipe, cone cylinder, unloading valve and exhaust pipe, and the cone cylinder is connected with air inlet pipe through the vertical fixed connection's pressurizing pipe of top, and the bottom of cone cylinder is connected with pressure reducing chamber, and unloading valve installs at the bottom of pressure reducing chamber, exhaust pipe vertically penetrates pressurizing pipe and cone cylinder and extends to the inside upper of pressure reducing chamber. The utility model discloses through setting pressurizing pipe, pressurizing spiral blade, the air current is carried out speedup pressurization, further promotes the rotation under the action of the flow guide spiral blade, and the centrifugal force to powder particle is improved greatly, exhaust pipe inhales the air current through filter screen mesh, and the content of powder particle inclusions of exhaust air current is reduced, sets up the filter bin to the air current pressure reduction deceleration, and horizontal baffle effectively blocks powder particle discharge, can be recycled through the recovery pipe, and the powder particle is intercepted through a variety of means, to reach the purpose of improving separation effect, improving powder particle recovery rate.

Description

Technical Field

[0001] This utility model relates to the field of powder recovery technology, specifically to a cyclone-type exhaust gas powder recovery device for spray drying towers. Background Technology

[0002] A spray drying tower is a device used to convert liquid materials into powder or granular solid products through spraying and drying processes. Its working principle is to disperse the liquid material into fine droplets through an atomizer, and then dry it rapidly after contact with hot air, eventually forming powder or granules. It is often used in conjunction with a cyclone powder recovery device.

[0003] Cyclone powder recovery devices utilize centrifugal force generated by rotating airflow to separate powder particles. Most cyclone powder recovery devices on the market currently introduce gas tangentially into a conical cylinder. Under the action of the inner wall of the conical cylinder, the gas is guided to form an external vortex that rotates downwards. Powder particles, under the action of centrifugal force, collide with the inner wall of the conical cylinder, decelerate, and fall downwards, thus completing the recovery. The airflow that has filtered the powder particles is discharged through the central exhaust pipe.

[0004] The efficiency of this type of cyclone powder recovery device is affected by many factors such as airflow speed and cone diameter. Different powder particles have different densities, and insufficient centrifugal force often leads to a decrease in the powder particle recovery rate, affecting the recovery effect. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a cyclone-type exhaust gas powder recovery device for spray drying towers, which solves the problem that current cyclone-type powder recovery devices on the market, where gas enters the conical cylinder tangentially, are prone to a decrease in powder particle recovery rate due to insufficient centrifugal force.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: A cyclone-type tail gas powder recovery device for spray drying tower includes an air inlet pipe, a conical cylinder, a discharge valve, and an exhaust pipe. The conical cylinder is connected to the air inlet pipe through a pressurization pipe vertically fixed at the top. A pressure reducing chamber is connected to the bottom of the conical cylinder, and the discharge valve is installed at the bottom of the pressure reducing chamber. The exhaust pipe vertically penetrates the pressurizing pipe and the conical cylinder and extends to the upper part of the decompression chamber. The surface of the exhaust pipe inside the pressurizing pipe is fixed with a pressurizing spiral blade, and the surface of the exhaust pipe inside the conical cylinder is fixed with a guide spiral blade. A filter screen is provided on the exhaust pipe near the lower end of the conical cylinder. The exhaust pipe is connected to the bottom of one side of the horizontally arranged filter chamber via a connecting pipe. The top of the filter chamber, which is away from the connecting pipe, is connected to an exhaust pipe. The bottom of the filter chamber, near the exhaust pipe, is connected to a recovery pipe. The interior of the filter chamber is equipped with multiple horizontal baffles along the vertical direction.

[0007] Preferably, the pressurization pipe is connected to the air inlet pipe via a large elbow, and the exhaust pipe passes through the large elbow.

[0008] Preferably, the diameters of the air inlet pipe, the large elbow, and the pressurization pipe are equal and do not exceed the radius of the top of the conical cylinder.

[0009] Preferably, the edge of the pressurizing spiral blade is connected to the inner wall of the pressurizing tube, and the distance between the edge of the guiding spiral blade and the inner wall of the conical cylinder is not less than the radius of the guiding spiral blade.

[0010] Preferably, the pressurizing spiral blade and the guiding spiral blade have the same spiral direction and are seamlessly connected and transitioned, and the radius of the guiding spiral blade is not less than the radius of the pressurizing spiral blade.

[0011] Preferably, the height of the outer edge of both the pressurizing spiral blade and the guiding spiral blade is less than the height of the inner edge of the opposite position.

[0012] Preferably, the horizontal cross-sectional dimension of the decompression chamber is larger than the horizontal cross-sectional dimension of the conical cylinder.

[0013] Preferably, the vertical exhaust pipe is connected to the horizontally arranged connecting pipe via a small elbow.

[0014] Preferably, the horizontal baffles are equidistantly arranged in the vertical direction, and the horizontal baffles are located between the connecting pipe and the recovery pipe and are located in the middle of the filter chamber, biased towards the recovery pipe.

[0015] Compared with the prior art, the present invention has the following beneficial effects: This invention accelerates and pressurizes the airflow by setting up a pressurizing pipe and pressurizing spiral blades. Under the action of the guide spiral blades, rotation is further promoted, significantly increasing the centrifugal force on powder particles. The exhaust pipe draws in airflow through the filter mesh, reducing the content of powder particles carried in the exhaust airflow. A filter chamber is set up to depressurize and slow down the airflow, and a horizontal baffle effectively blocks the discharge of powder particles, which can be recovered through a recovery pipe. By intercepting powder particles through multiple means, the separation effect is improved and the powder particle recovery rate is increased. This solves the problem that the cyclone powder recovery device currently on the market, where the gas enters the conical cylinder tangentially, is prone to a decrease in powder particle recovery rate due to insufficient centrifugal force. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of this utility model; Figure 3 This is a schematic diagram showing the corresponding positions of the filter mesh of this utility model; Figure 4 This is a cross-sectional view of the exhaust pipe of this utility model.

[0017] In the diagram: 1. Inlet pipe; 2. Conical cylinder; 3. Discharge valve; 4. Exhaust pipe; 5. Pressurization pipe; 6. Pressure reducing chamber; 7. Pressurization spiral blade; 8. Guide spiral blade; 9. Filter mesh; 10. Connecting pipe; 11. Filter chamber; 12. Discharge pipe; 13. Recovery pipe; 14. Horizontal baffle; 15. Large elbow; 16. Small elbow. 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 1-4 As shown, this utility model provides a technical solution: a cyclone-type tail gas powder recovery device for spray drying tower, including an air inlet pipe 1, a conical cylinder 2, a discharge valve 3, and an exhaust pipe 4. The conical cylinder 2 is connected to the air inlet pipe 1 through a pressurizing pipe 5 vertically fixed at the top. The pressurizing pipe 5 is connected to the air inlet pipe 1 through a large elbow 15. The exhaust pipe 4 passes through the large elbow 15. The diameters of the air inlet pipe 1, the large elbow 15, and the pressurizing pipe 5 are equal and do not exceed the radius of the top of the conical cylinder 2. A pressure reducing chamber 6 is connected to the bottom of the conical cylinder 2. The horizontal cross-sectional dimension of the pressure reducing chamber 6 is larger than the horizontal cross-sectional dimension of the conical cylinder 2. The discharge valve 3 is installed at the bottom of the pressure reducing chamber 6. The exhaust duct 4 vertically penetrates the pressurizing pipe 5 and the conical cylinder 2 and extends to the upper part of the pressure reducing chamber 6. A filter screen 9 is provided on the exhaust duct 4 near the lower end of the conical cylinder 2. A pressurizing spiral blade 7 is fixed on the surface of the exhaust duct 4 inside the pressurizing pipe 5. The edge of the pressurizing spiral blade 7 is connected to the inner wall of the pressurizing pipe 5. A guide spiral blade 8 is fixed on the surface of the exhaust duct 4 inside the conical cylinder 2. The distance between the edge of the guide spiral blade 8 and the inner wall of the conical cylinder 2 is not less than the radius of the guide spiral blade 8. The pressurizing spiral blade 7 and the guide spiral blade 8 have the same spiral direction and are seamlessly connected. The radius of the guide spiral blade 8 is not less than the radius of the pressurizing spiral blade 7. The height of the outer edge of both the pressurizing spiral blade 7 and the guide spiral blade 8 is less than the height of the inner edge of the opposite position. The exhaust pipe 4 is connected to the bottom of one side of the horizontally arranged filter chamber 11 through the connecting pipe 10. The vertical exhaust pipe 4 is connected to the horizontally arranged connecting pipe 10 through the small elbow 16. The top of the side of the filter chamber 11 away from the connecting pipe 10 is connected to the discharge pipe 12. The bottom of the filter chamber 11 is connected to the end near the discharge pipe 12. Multiple horizontal baffles 14 are arranged vertically inside the filter chamber 11. The horizontal baffles 14 are equidistantly arranged vertically. The horizontal baffles 14 are located between the connecting pipe 10 and the discharge pipe 13 and are located in the middle of the filter chamber 11, biased towards the discharge pipe 13.

[0020] Working principle: The airflow mixed with powder particles is transported through the inlet pipe 1. Before entering the conical cylinder 2, the airflow is pressurized and accelerated by the pressurizing pipe 5 and the internal pressurizing spiral blade 7. After entering the conical cylinder 2, the airflow is guided by the inner wall of the conical cylinder 2 and the guide spiral blade 8, which further promotes the rotation of the airflow and greatly increases the centrifugal force of the powder particles. The powder particles collide with the inner wall of the conical cylinder 2 and are decelerated. Finally, after entering the depressurization chamber 6, the airflow is further decelerated and separated from the airflow. It can be discharged and collected through the discharge valve 3. The aperture of the filter screen 9 is larger than the size of the powder particles but not more than five times, so it does not affect the airflow discharge and can reduce the content of powder particles mixed in the discharged airflow. After the airflow enters the filter chamber 11, it is depressurized and decelerated. When the airflow flows from the lower left to the upper right, the powder particles will collide with the horizontal baffle 14 and bounce downwards, effectively blocking the discharge of powder particles. The powder particles are recovered through the recovery pipe 13, which improves the powder recovery rate.

[0021] It should be noted that, in this document, terms such as “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0022] 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 these 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 cyclone-type tail gas powder recovery device for spray drying tower, comprising an air inlet pipe (1), a conical cylinder (2), a discharge valve (3), and an exhaust pipe (4), characterized in that: The conical cylinder (2) is connected to the air inlet pipe (1) through a pressurization pipe (5) vertically fixed at the top. The bottom of the conical cylinder (2) is connected to a pressure reducing chamber (6), and the unloading valve (3) is installed at the bottom of the pressure reducing chamber (6). The exhaust pipe (4) vertically penetrates the pressurizing pipe (5) and the conical cylinder (2) and extends to the upper part of the pressure reducing chamber (6). The surface of the exhaust pipe (4) inside the pressurizing pipe (5) is fixed with a pressurizing spiral blade (7). The surface of the exhaust pipe (4) inside the conical cylinder (2) is fixed with a flow guiding spiral blade (8). The exhaust pipe (4) near the lower end of the conical cylinder (2) is provided with a filter screen (9). The exhaust pipe (4) is connected to the bottom of one side of the horizontally arranged filter chamber (11) through the connecting pipe (10). The top of the filter chamber (11) facing away from the connecting pipe (10) is connected to the discharge pipe (12). The bottom of the filter chamber (11) near the discharge pipe (12) is connected to the recovery pipe (13). The filter chamber (11) has multiple horizontal baffles (14) arranged vertically inside.

2. The spray drying tower cyclone tail gas powder recovery device according to claim 1, characterized in that: The pressurization pipe (5) is connected to the air inlet pipe (1) through a large elbow (15), and the exhaust pipe (4) passes through the large elbow (15).

3. The spray drying tower cyclone tail gas powder recovery device according to claim 2, characterized in that: The diameters of the air inlet pipe (1), the large elbow (15) and the pressurization pipe (5) are equal and do not exceed the radius of the top of the conical cylinder (2).

4. The spray drying tower cyclone tail gas powder recovery device according to claim 1, characterized in that: The edge of the pressurizing spiral blade (7) is connected to the inner wall of the pressurizing tube (5), and the distance between the edge of the flow guiding spiral blade (8) and the inner wall of the conical cylinder (2) is not less than the radius of the flow guiding spiral blade (8).

5. The spray drying tower cyclone tail gas powder recovery device according to claim 1, characterized in that: The pressurizing spiral blade (7) and the guiding spiral blade (8) have the same spiral direction and are seamlessly connected, and the radius of the guiding spiral blade (8) is not less than the radius of the pressurizing spiral blade (7).

6. The spray drying tower cyclone tail gas powder recovery device according to claim 1, characterized in that: The height of the outer edge of both the pressurizing spiral blade (7) and the guiding spiral blade (8) is less than the height of the inner edge of the opposite position.

7. The spray drying tower cyclone tail gas powder recovery device according to claim 1, characterized in that: The horizontal cross-sectional dimension of the pressure-reducing chamber (6) is larger than that of the conical cylinder (2).

8. The spray drying tower cyclone tail gas powder recovery device according to claim 1, characterized in that: The vertical exhaust pipe (4) is connected to the horizontally arranged connecting pipe (10) through a small elbow (16).

9. The spray drying tower cyclone tail gas powder recovery device according to claim 1, characterized in that: The horizontal baffles (14) are equidistantly arranged in the vertical direction. The horizontal baffles (14) are located between the connecting pipe (10) and the recovery pipe (13) and are located in the middle of the filter chamber (11) on one side biased towards the recovery pipe (13).

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