Phosphogypsum raw material particle screening device

Abstract

This application relates to the technical field of phosphogypsum screening devices, and discloses a phosphogypsum raw material particle screening device, including a screening box. A feed hopper is installed on the upper surface of the screening box, and discharge pipes are installed on the lower and side surfaces of the screening box. A vibrating motor is installed on the lower surface of the screening box, and a screen structure is installed inside the screening box. In this application, the shape memory effect of the nickel-titanium alloy wire is triggered by resistance wire heating to achieve dynamic adjustment of the screen aperture size, adapting to the screening requirements of phosphogypsum with different particle sizes, reducing the frequency of screen replacement. When the screen becomes clogged, a booster pump is used to pump cooling water into the heat dissipation hollow column, thereby cooling the nickel-titanium alloy wire and causing the screen to return to its original aperture size. As the vibrating motor continues to work, the residue at the screen aperture can be quickly shaken off, effectively avoiding screen clogging, greatly reducing downtime for cleaning due to screen clogging, and improving production continuity.

Description

Technical Field

[0001] This utility model relates to the technical field of phosphogypsum screening devices, and in particular to a phosphogypsum raw material particle screening device. Background Technology

[0002] Phosphogypsum is an industrial waste generated during the wet process of phosphoric acid production. It is usually in a wet, separate state. In the process of resource utilization of phosphogypsum, different application scenarios have different requirements for phosphogypsum particles. Therefore, it is necessary to use a screening device to screen the phosphogypsum raw material so that it can be reused in the future.

[0003] In traditional screen applications, screens with fixed apertures dominate. Over time, the problem of screen clogging has become increasingly prominent. Traditional screens lack automatic cleaning functions and usually rely on manual cleaning to maintain screen performance. However, manual cleaning is not only time-consuming and labor-intensive, but it is also difficult to ensure the thoroughness and timeliness of cleaning. Furthermore, frequent manual operation may cause material damage to the screen and shorten its service life. Utility Model Content

[0004] To solve the above problems, this utility model provides a phosphogypsum raw material particle screening device.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a phosphogypsum raw material particle screening device, including a screening box, a feeding hopper installed on the upper surface of the screening box, discharge pipes installed on the lower and side surfaces of the screening box, a vibration motor installed on the lower surface of the screening box, a screen structure installed inside the screening box, and a water tank connected to the screen structure via a water pipe, and a booster pump installed between one of the water pipes, the screen structure being composed of a frame, a screen body, nickel-titanium alloy wire, resistance heating wire, and heat dissipation hollow column, the screen body being installed inside the frame, nickel-titanium alloy wire being inserted inside the screen body, resistance heating wire being inserted inside the nickel-titanium alloy wire, and heat dissipation hollow column being inserted inside the nickel-titanium alloy wire, with a water pipe installed on the side surface of the heat dissipation hollow column.

[0006] By adopting the above technical solution, the shape memory effect of the nickel-titanium alloy wire is triggered by resistance wire heating, which realizes dynamic adjustment of the screen aperture size to adapt to the screening requirements of phosphogypsum with different particle sizes, reduces the frequency of screen replacement, and when the screen is clogged, a booster pump is used to pump cooling water into the heat dissipation hollow column to cool the nickel-titanium alloy wire, thereby causing the screen to return to its original aperture. As the vibrating motor continues to work, the residue at the screen aperture can be quickly shaken off, effectively avoiding screen clogging, greatly reducing the downtime for cleaning caused by screen clogging, and improving production continuity.

[0007] Furthermore, the screening box is equipped with a guide grid inside by an L-shaped support frame, and the inverted V plates in the upper and lower guide grids are installed in a staggered manner.

[0008] By adopting the above technical solution, after phosphogypsum enters the screening box, it is dispersed in multiple stages by the staggered inverted V plates, so that the material is evenly distributed on the screen, avoiding local accumulation on the screen and thus reducing screening efficiency, which is conducive to improving screening effect.

[0009] Furthermore, the feed hopper has a funnel-shaped structure.

[0010] By adopting the above technical solution, the material falls faster by utilizing gravity acceleration, reducing feeding resistance, and at the same time guiding the raw material to fall into the central area of ​​the guide grid, thereby improving feeding efficiency.

[0011] Furthermore, fins are welded to the side surface of the water tank.

[0012] By adopting the above technical solution, the contact area with air is increased, air convection is enhanced, and the cooling water in the water tank is naturally cooled.

[0013] Furthermore, vibration-damping spring support legs are welded to the lower surface of the screening box.

[0014] By adopting the above technical solution, the vertical and horizontal vibrations generated by the vibratory motor can be absorbed, reducing the impact of the equipment on the foundation.

[0015] Furthermore, an integrated controller is bolted to the side surface of the screening box, and a buffer pad is installed on the back of the integrated controller.

[0016] By adopting the above technical solutions, the integrated controller can uniformly regulate the frequency of the vibration motor, the power of the resistance heating wire, and the start and stop of the booster pump. It supports automated program settings, reduces manual intervention, and the buffer pad isolates vibration interference to a certain extent, protects the internal circuit board, and extends the life of electrical components.

[0017] In summary, this utility model has the following beneficial effects:

[0018] 1. In this application, the shape memory effect of the nickel-titanium alloy wire is triggered by resistance wire heating to achieve dynamic adjustment of the screen aperture size, adapt to the screening requirements of phosphogypsum with different particle sizes, reduce the frequency of screen replacement, and when the screen is blocked, the booster pump is used to pump cooling water into the heat dissipation hollow column to cool the nickel-titanium alloy wire, thereby causing the screen to return to its original aperture. As the vibrating motor continues to work, the residue at the screen aperture can be shaken off quickly, effectively avoiding screen blockage, greatly reducing the downtime cleaning time caused by screen blockage, and improving production continuity.

[0019] 2. In this application, after the phosphogypsum enters the screening box, it is dispersed in multiple stages by the staggered inverted V plates, so that the material is evenly distributed on the screen, avoiding local accumulation on the screen and thus reducing screening efficiency, which is conducive to improving screening effect. Attached Figure Description

[0020] Fig. 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0021] Fig. 2 This is a schematic diagram of the material guiding grid and its connection structure according to an embodiment of the present utility model;

[0022] Fig. 3 This is a schematic diagram of the screen structure and its connection structure according to an embodiment of the present invention.

[0023] In the diagram: 1. Screening box; 2. Feed hopper; 3. Guide grid; 4. Discharge pipe; 5. Screen structure; 6. Vibration motor; 7. Frame; 8. Screen body; 9. Nickel-titanium alloy wire; 10. Resistance heating wire; 11. Heat dissipation hollow column; 12. Water pipe; 13. Booster pump; 14. Water tank; 15. Fins; 16. Vibration isolation spring support leg; 17. Integrated controller. Detailed Implementation

[0024] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0025] like Figs. 1-3 As shown in the embodiment of this application, a phosphogypsum raw material particle screening device is disclosed, including a screening box 1. A feed hopper 2 is installed on the upper surface of the screening box 1. Discharge pipes 4 are installed on the lower and side surfaces of the screening box 1. A vibration motor 6 is installed on the lower surface of the screening box 1. A screen structure 5 is installed inside the screening box 1. The screen structure 5 is connected to a water tank 14 through a water pipe 12. A booster pump 13 is installed between the water pipes 12. The screen structure 5 is composed of a frame 7, a screen body 8, a nickel-titanium alloy wire 9, a resistance heating wire 10, and a heat dissipation hollow column 11. The screen body 8 is installed inside the frame 7. The nickel-titanium alloy wire 9 is inserted inside the screen body 8. The resistance heating wire 10 is inserted inside the nickel-titanium alloy wire 9. The heat dissipation hollow column 11 is inserted inside the nickel-titanium alloy wire 9. A water pipe 12 is installed on the side surface of the heat dissipation hollow column 11.

[0026] Screening and self-cleaning system: The frame 7 is fixed to the inner wall of the screening box 1 by bolts, and a rubber sealing gasket is installed at the connection. The edge of the screen body 8 is clamped to the frame 7 by pressure strips to ensure tension. The nickel-titanium alloy wire 9 is inserted at equal intervals along the warp and weft directions of the screen, and both ends are fixed to the frame 7 by insulating terminals. The resistance heating wire 10 is inserted into the nickel-titanium alloy wire 9, and the heat dissipation hollow column 11 is inserted into the nickel-titanium alloy wire 9. The end is connected to the water pipe 12, and the other end of the water pipe 12 is connected to the water tank 14. The integrated controller 17 delivers 0-24V voltage to heat up the resistance heating wire 10, triggering the nickel-titanium alloy wire 9 to contract. After the power is cut off, the water circulation cools and resets the alloy wire. After the aperture expands, the high-frequency vibration generated by the vibration motor 6 loosens and releases the particles stuck in the screen hole, completing the self-cleaning process.

[0027] Vibrating motor 6: Vibrating motor 6 is fixed to the bottom of screening box 1 by bolts. Under the action of vibrating motor 6, the material is thrown on the screen, which improves the screening rate.

[0028] Inside the screening box 1, a guide grid 3 is installed via an L-shaped support frame, with the inverted V plates in the upper and lower guide grids 3 installed in a staggered manner.

[0029] Material guide grid 3: Material guide grid 3 is welded to the inner wall of screening box 1 via an L-shaped support frame. The inverted V-plates in material guide grid 3 are made of 304 stainless steel plate. The material is diverted to both sides after impacting the upper inverted V-plate with an angle of 30° to 45° between adjacent inverted V-plates. It is then dispersed again by the lower staggered inverted V-plate. After multi-stage dispersion, the material is evenly distributed on the screen, avoiding local accumulation on the screen and reducing screening efficiency, which is conducive to improving screening effect.

[0030] The feed hopper 2 has a funnel-shaped structure.

[0031] Feed hopper 2: Feed hopper 2 is fixed to screening box 1 by welding. It is in the shape of a cone funnel. Gravity acceleration is used to make phosphogypsum fall into screening box 1 quickly. The cone angle design ensures that the material is concentrated and guided into screening box 1.

[0032] Fins 15 are welded to the side surface of water tank 14.

[0033] Fin 15: Fin 15 is welded to the side surface of water tank 14 and forms a rigid connection with the main body of water tank 14, indirectly contacting the cooling water inside water tank 14. The heat of the hot water in water tank 14 is conducted to fin 15 through the tank wall. Fin 15, as a high thermal conductivity medium, quickly absorbs heat and increases the heat dissipation area. When air flows through the gaps between fins 15, it carries away heat through natural convection or forced ventilation, accelerating the cooling of the cooling water.

[0034] Vibration-isolation spring support legs 16 are welded to the lower surface of the screening box 1.

[0035] Vibration isolation spring support leg 16: Vibration isolation spring support leg 16 is welded to the four corners of the bottom of the screening box 1, and a rubber pad is installed at the bottom to absorb the vertical and horizontal vibrations generated by the vibration motor 6 and reduce the impact of the equipment on the foundation.

[0036] An integrated controller 17 is bolted to the side surface of the screening box 1, and a buffer pad is installed on the back of the integrated controller 17.

[0037] Integrated controller 17: The controller housing is fixed to the side surface of the screening box 1 by bolts, and a silicone buffer pad is attached to the back. The resistance heating wire 10, the vibration motor 6 and the booster pump 13 are connected by shielded cables to realize full-process automated control and reduce manual intervention.

[0038] In this embodiment, the working principle of the phosphogypsum raw material particle screening device is as follows: the phosphogypsum raw material falls into the guide grid 3 through the feed bin 2, and is evenly distributed to the screen after being dispersed by the staggered inverted V plate. The vibration motor 6 drives the screen to vibrate at high frequency, and the screening is completed by dynamic control with the nickel-titanium alloy wire 9. When the screen is blocked, the resistance heating wire 10 triggers the aperture to expand, and the vibration achieves self-cleaning. The water tank 14 maintains the low temperature of the cooling water through the fins 15 to ensure that the nickel-titanium alloy wire 9 quickly resets, forming a cycle operation.

[0039] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A phosphogypsum raw material particle screening device, comprising a screening box (1), characterized in that: The upper surface of the screening box (1) is equipped with a feed hopper (2), and the lower and side surfaces of the screening box (1) are equipped with discharge pipes (4). The lower surface of the screening box (1) is equipped with a vibration motor (6). The screening box (1) is equipped with a screen structure (5), and the screen structure (5) is connected to a water tank (14) through a water pipe (12). A booster pump (13) is installed between one of the water pipes (12). The screen structure (5) is composed of a frame (7). The frame (7) consists of a screen body (8), a nickel-titanium alloy wire (9), a resistance heating wire (10), and a heat dissipation hollow column (11). The screen body (8) is installed inside the frame (7). The nickel-titanium alloy wire (9) is inserted inside the screen body (8). The resistance heating wire (10) is inserted inside the nickel-titanium alloy wire (9). The heat dissipation hollow column (11) is inserted inside the nickel-titanium alloy wire (9). A water pipe (12) is installed on the side surface of the heat dissipation hollow column (11).

2. The phosphogypsum raw material particle screening device according to claim 1, characterized in that: The screening box (1) is equipped with a guide grid (3) inside by an L-shaped support frame, and the inverted V plates in the guide grid (3) are installed in a staggered manner.

3. The phosphogypsum raw material particle screening device according to claim 2, characterized in that: The feed hopper (2) has a funnel-shaped structure.

4. The phosphogypsum raw material particle screening device according to claim 3, characterized in that: The side surface of the water tank (14) is welded with fins (15).

5. The phosphogypsum raw material particle screening device according to claim 4, characterized in that: The lower surface of the screening box (1) is welded with vibration isolation spring support legs (16).

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