Anhydrous hydrogen fluoride anion removal feeding device
By designing a feeding tray and feeding control components, the uniform addition of lime powder to anhydrous hydrogen fluoride mixed solution was achieved, solving the problem of uneven lime powder addition in traditional methods, improving anion removal efficiency and reaction stability, and reducing production costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XUANCHENG HENGTAI ELECTRONICS CHEM MATERIAL
- Filing Date
- 2025-06-23
- Publication Date
- 2026-06-12
AI Technical Summary
Traditional methods make it difficult to evenly add lime powder to the surface of anhydrous hydrogen fluoride mixed solution, resulting in local concentrations that are too high or too low, affecting the anion removal effect and reaction stability.
Design a feeding device that includes a feeding tray and a feeding control component. The addition of lime powder is precisely controlled by a rotating plate and a sealing component, and a stirring component is used to ensure uniform mixing and avoid uneven concentration in some areas.
The method achieves uniform addition of lime powder in anhydrous hydrogen fluoride mixed solution, which improves anion removal efficiency and reaction stability, shortens the production cycle, and reduces production costs.
Smart Images
Figure CN224345845U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of anhydrous hydrogen fluoride preparation technology, specifically to a feeding device for the removal of anhydrous hydrogen fluoride anions. Background Technology
[0002] During the production and use of anhydrous hydrogen fluoride, the mixed solution contains a certain amount of anionic impurities. The presence of these anionic impurities affects the quality and purity of the anhydrous hydrogen fluoride, thus impacting its application in subsequent industrial production. For example, in the electronics industry and chemical synthesis, the purity requirements for anhydrous hydrogen fluoride are extremely high, and the presence of anionic impurities may lead to problems such as decreased product performance and instability in the production process.
[0003] Currently, there are various methods for removing anionic impurities from anhydrous hydrogen fluoride, among which adding lime powder to the anhydrous hydrogen fluoride mixed solution is a common and effective method. Lime powder can react chemically with anions to form a precipitate, thereby achieving the purpose of removing anions. However, in actual operation, how to uniformly add lime powder to the surface of the anhydrous hydrogen fluoride mixed solution is a key issue. Traditional addition methods often fail to ensure the uniformity of lime powder addition, easily resulting in local concentrations that are too high or too low. This not only affects the anion removal effect but also leads to incomplete reactions. Utility Model Content
[0004] To address the aforementioned issues, this application provides a feeding device for the removal of anhydrous hydrogen fluoride anions.
[0005] To achieve the above objectives, this application provides the following technical solution: a feeding device for the removal of anhydrous hydrogen fluoride anions, comprising a reaction tank with an internal stirring assembly and a feeding mechanism for adding lime powder to the inside of the reaction tank. The reaction tank opening is provided with a sealed tank cover. The feeding mechanism includes a feed hopper on the tank cover, a feeding tray at the tank opening, and a feeding control assembly on the feeding tray. Lime powder is placed in the feed hopper, and the lime powder is controlled to be added to the feeding tray. The feeding control assembly controls the lime powder to be uniformly added to the surface of the hydrogen fluoride mixed solution in the reaction tank.
[0006] Preferably, the top of the feeding tray is provided with a feeding trough, the bottom wall of the feeding trough is provided with multiple storage troughs in a circumferential array, and the bottom wall of the storage trough is provided with a feeding trough hole. The feeding control component includes a rotating plate disposed in the feeding trough through a first rotating structure, and a sealing element disposed on the bottom end of the feeding tray and controlling the sealing or opening of the feeding trough hole. The first rotating structure drives the rotating plate to rotate, pushing the lime powder accumulated in the feeding trough into the multiple storage troughs.
[0007] Preferably, the sealing element includes a first sealing ring rotatably disposed at the middle of the bottom end of the feeding tray, a second sealing ring sleeved on the first sealing ring, multiple sealing strips disposed between the first and second sealing rings, and a control structure disposed on the feeding tray and controlling the rotation of the second sealing ring, wherein the sides of the multiple sealing strips are respectively attached to the opening positions of multiple feeding slot holes.
[0008] Preferably, the control structure includes a driven rack fixedly disposed on the inner ring of the second sealing ring and located between two adjacent sealing strips, and a drive gear meshing with the driven rack and rotatably disposed on the bottom end of the feeding tray.
[0009] Preferably, the sealing element further includes a vibrating ring disposed on the bottom end of the first sealing ring via a second rotating structure, a metal ball passing through the opening of the expansion groove on the side of the vibrating ring via a limiting spring, and a plurality of fixed posts fixedly disposed in a circumferential array on the bottom end face of the first sealing ring. When the vibrating ring rotates, the fixed posts contact the rotating metal ball, pushing the metal ball to move into the expansion groove and compressing the limiting spring. After the metal ball rotates through the fixed posts, the limiting spring returns to its normal state, pushing the metal ball to impact the opening of the expansion groove.
[0010] Preferably, the stirring assembly includes a stirring rod that passes through the interior of the reaction vessel along the axial direction of the reaction vessel, and stirring blades that are disposed inside the reaction vessel and detachably mounted on the stirring rod.
[0011] The beneficial effects of this invention are as follows: By using the feeding control component set on the feeding tray, it is easy to uniformly add lime powder from the feeding hopper to the surface of the hydrogen fluoride mixed solution in the reaction tank, so that the lime powder can be uniformly mixed with the hydrogen fluoride mixed solution. Combined with the stirring component to mix the hydrogen fluoride mixed solution, it is ensured that the lime powder is uniformly mixed in the hydrogen fluoride mixed solution, avoiding the occurrence of excessively high or low local concentrations of lime powder in the solution, and improving the effect of anion removal in the hydrogen fluoride mixed solution. Attached Figure Description
[0012] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:
[0013] Figure 1 This is a simplified structural diagram of the feeding device for removing anhydrous hydrogen fluoride anions proposed in this utility model.
[0014] Figure 2 This is a schematic diagram of the feeding control component of this utility model.
[0015] Figure 3 This is a schematic diagram of the internal structure of the reaction vessel of this utility model.
[0016] Figure 4 This is a schematic diagram of the sealing component structure of this utility model.
[0017] In the diagram: 1. Reaction vessel; 2. First connecting ring; 3. Second connecting ring; 4. Tank cover; 5. Feed hopper; 6. Liquid inlet pipe; 7. Feeding tray; 8. Stirring rod; 9. Clamping block; 10. Feeding trough; 11. Feeding trough hole; 12. Linkage ring; 13. Rotating plate; 14. Fixed ring; 15. Stirring blade; 16. First sealing ring; 17. Second sealing ring; 18. Sealing strip; 19. Vibration ring; 20. Expansion groove; 21. Metal ball; 22. Fixed column; 23. Driven rack; 24. Drive gear. Detailed Implementation
[0018] To make the technical means, creative features, and achieved objectives and effects of this utility model easier to understand, the present utility model is further described below with reference to specific embodiments and accompanying drawings. However, the following embodiments are only preferred embodiments of this utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described in the embodiments without creative effort are all within the protection scope of this utility model.
[0019] Example 1: Reference Figures 1-4 The device shown is a feeding device for the removal of anhydrous hydrogen fluoride anions, including a reaction tank 1 with an internal stirring assembly and a feeding mechanism for adding lime powder to the reaction tank 1. The reaction tank 1 is provided with a sealed tank cover 4 at the tank opening. The feeding mechanism includes a feed hopper 5 on the tank cover 4, a feeding tray 7 at the tank opening, and a feeding control component on the feeding tray 7. Lime powder is placed in the feed hopper 5 and the lime powder is controlled to be added to the feeding tray 7. The feeding control component controls the lime powder to be added evenly to the surface of the hydrogen fluoride mixed solution in the reaction tank 1.
[0020] like Figures 1-4As shown in this embodiment, lime powder is pre-placed in the feed hopper 5. A corresponding control mechanism (such as a screw conveyor or valve) quantitatively adds the lime powder from the feed hopper 5 to the feeding trough 10 of the feeding tray 7. Since the position of the lime powder on the feeding tray 7 remains unchanged, the lime powder accumulates in the feeding trough 10. Then, the feeding control component uniformly adds the lime powder to the surface of the hydrogen fluoride mixed solution. Simultaneously, the stirring component stirs and mixes the hydrogen fluoride mixed solution, ensuring thorough mixing of the lime powder and the hydrogen fluoride mixed solution, promoting the chemical reaction, and thus removing anions from the solution. Through precise control of the feeding control component, lime powder can be uniformly added to the surface of the hydrogen fluoride mixed solution, avoiding problems of excessively high or low local concentrations. If the lime powder is not added uniformly, excessively high local concentrations may lead to an overly vigorous reaction and the production of byproducts; excessively low local concentrations may prevent effective removal of anions. Uniform addition of lime powder ensures the stability and effectiveness of the reaction, improving the efficiency and quality of anion removal.
[0021] like Figure 1 As shown, the tank cover 4 is equipped with a liquid inlet pipe 6, and the liquid inlet pipe 6 is equipped with a valve. The feed hopper 5 is equipped with a sealing cover.
[0022] like Figures 1-3 As shown, a first connecting ring 2 is fixedly installed on the opening of the reaction vessel 1, and a second connecting ring 3 matching the first connecting ring 2 is fixedly installed on the lid 4. The lid 4 is sealed to the first connecting ring 2 through the second connecting ring 3, and a rubber ring is provided between the first connecting ring 2 and the second connecting ring 3 to achieve a sealed connection between the lid 4 and the reaction vessel 1. The mounting surfaces of the first connecting ring 2 and the second connecting ring 3 are both provided with slots. When the feeding tray 7 is installed at the opening, the position between the feeding tray 7 and the first connecting ring 2 can be fixed by the locking block 9 fixedly installed on the side of the feeding tray 7 passing through the slot.
[0023] like Figure 2 and Figure 3 As shown, a feeding trough 10 is provided at the top of the feeding tray 7. Multiple storage troughs are arranged in a circular array on the bottom wall of the feeding trough 10, and a feeding trough hole 11 is provided on the bottom wall of the storage trough. The feeding control component includes a rotating plate 13 disposed in the feeding trough 10 through a first rotating structure, and a sealing element disposed on the bottom end of the feeding tray 7 to control the opening and closing of the feeding trough hole 11. The first rotating structure drives the rotating plate 13 to rotate, pushing the lime powder accumulated in the feeding trough 10 into the multiple storage troughs.
[0024] In this embodiment, lime powder is conveyed from the feed hopper 5 to the feeding trough 10 of the feeding tray 7 and accumulates in the feeding trough 10. At this time, the first rotating structure (e.g., a motor-driven rotating shaft) starts to work, driving the rotating plate 13 to rotate in the feeding trough 10. The rotating plate 13 acts as a pusher, gradually pushing the lime powder accumulated in the feeding trough 10 towards multiple storage troughs arranged in a circumferential array on the bottom wall of the feeding trough 10. As the rotating plate 13 continues to rotate, lime powder is continuously filled into each storage trough until each storage trough contains a certain amount of lime powder. Since the volume of each storage trough is fixed, by controlling the multiple rotations of the rotating plate 13, the amount of lime powder in each storage trough can be precisely controlled to ensure that the storage trough is completely filled. When it is necessary to add lime powder to the hydrogen fluoride mixed solution in the reaction tank 1, the sealing element set on the bottom end of the feeding tray 7 starts to operate. The sealing element changes its state through a specific mechanical structure (such as gear transmission, linkage mechanism, etc.), causing the part that was originally sealing the feeding slot 11 to move away, thereby opening the feeding slot 11. After the feeding slot 11 is opened, the lime powder in the storage tank falls evenly onto the surface of the hydrogen fluoride mixed solution in the reaction tank 1 under its own gravity. When the stirring component is used to stir and mix the hydrogen fluoride mixed solution, it ensures that the lime powder and the hydrogen fluoride mixed solution are evenly and fully mixed, avoiding the situation of adding too much or too little lime powder in some places, thus ensuring the uniformity and stability of the reaction. The uniform and precise addition of lime powder allows the lime powder to fully contact the hydrogen fluoride mixed solution, accelerating the rate of chemical reaction, improving the efficiency of anion removal, thereby shortening the production cycle and reducing production costs.
[0025] The stirring assembly includes a stirring rod 8 that passes through the interior of the reaction vessel 1 along the axial direction of the reaction vessel 1, and a stirring blade 15 that is disposed inside the reaction vessel 1 and detachably installed on the stirring rod 8. The stirring blade 15 is fixedly disposed on a fixing ring 14. The fixing ring 14 is sleeved on the body of the stirring rod 8 through an inner ring, and is connected by a bolt thread that passes through the fixing ring 14, so that the end of the bolt abuts against the body of the stirring rod 8, which facilitates the detachable installation of the stirring blade 15 on the body of the stirring rod 8. The stirring rod 8 is driven to rotate by a motor disposed on the tank cover 4.
[0026] like Figure 3 As shown, in this embodiment, the first rotating structure includes a linkage ring 12 sleeved on the body of the stirring rod 8, and the side of the linkage ring 12 is fixedly connected to the side of the rotating plate 13. A first rotating hole is opened on the side of the linkage ring 12, and a bolt is threaded through the first rotating hole. The bolt abuts against the side of the stirring rod 8, thereby fixing the linkage ring 12 and the stirring rod 8. When the stirring rod 8 stirs the hydrogen fluoride mixed solution, the rotating plate 13 is driven to rotate synchronously, avoiding the need to add a new drive component to drive the rotating plate 13 to move within the feeding tank 10.
[0027] like Figure 3 and Figure 4 As shown, the sealing element includes a first sealing ring 16 rotatably disposed at the middle of the bottom end of the feeding tray 7, a second sealing ring 17 sleeved on the first sealing ring 16, multiple sealing strips 18 disposed between the first sealing ring 16 and the second sealing ring 17, and a control structure disposed on the feeding tray 7 and controlling the second sealing ring 17 to rotate. The sides of the multiple sealing strips 18 are respectively attached to the opening positions of multiple feeding slot holes 11.
[0028] In this embodiment, when no lime powder is added, the seal is in an initial sealed state. At this time, the first sealing ring 16 is rotatably positioned at the center of the bottom of the feeding tray 7, the second sealing ring 17 is sleeved on the first sealing ring 16, and multiple sealing strips 18 are located between the first sealing ring 16 and the second sealing ring 17. The sides of the sealing strips 18 are correspondingly attached to the openings of multiple feeding slots 11, completely sealing the feeding slots 11 and preventing lime powder from leaking prematurely onto the surface of the hydrogen fluoride mixed solution. When lime powder needs to be added to the feeding slots 11, the control structure starts to operate. The control structure (e.g., a transmission mechanism driven by a motor) applies a rotational torque to the second sealing ring 17, causing the second sealing ring 17 to rotate relative to the first sealing ring 16. Since the sealing strip 18 is connected between the first sealing ring 16 and the second sealing ring 17, as the second sealing ring 17 rotates, the sealing strip 18 gradually changes its position. The side of the sealing strip 18, which was originally attached to the opening of the feeding slot 11, begins to move away, causing the feeding slot 11 to gradually open. When the second sealing ring 17 rotates to a certain angle, the feeding slot 11 is fully open, at which point the lime powder in the storage tank can fall through the feeding slot 11 onto the surface of the hydrogen fluoride mixed solution in the reaction tank 1. By controlling the rotation of the second sealing ring 17 through the control structure, the position of the sealing strip 18 is controlled, achieving precise control over the opening and closing of the feeding slot 11. This precise control ensures that the feeding slot 11 is opened promptly when lime powder needs to be added and quickly closed after addition, ensuring the stability and controllability of the reaction process. Furthermore, by adjusting the parameters of the control structure (such as rotation speed and rotation angle) according to actual production needs, the opening time and degree of opening of the feeding slot 11 can be flexibly controlled, thereby adapting to different reaction conditions and lime powder addition requirements, improving the versatility and adaptability of the device. After the lime powder is added, the control structure activates again, causing the second sealing ring 17 to rotate in the opposite direction. The reverse rotation of the second sealing ring 17 causes the sealing strip 18 to gradually return to its initial position, re-attaching to the opening of the feeding slot 11, thus resealing the feeding slot 11 and restoring the sealing state of the device.
[0029] like Figure 4As shown, the control structure includes a driven rack 23 fixedly mounted on the inner ring of the second sealing ring 17 and located between two adjacent sealing strips 18, and a drive gear 24 meshing with the driven rack 23 and rotatably mounted on the bottom end of the feeding tray 7. By controlling the drive gear 24 to rotate via a motor, the second sealing ring 17 with the driven rack 23 can be rotated, thereby facilitating the movement of the sealing strips 18 and realizing the opening and closing of the feeding slot hole 11.
[0030] like Figure 4 As shown, the sealing element also includes a vibrating ring 19 disposed on the bottom end of the first sealing ring 16 via a second rotating structure, a metal ball 21 passing through the opening of the telescopic groove 20 on the side of the vibrating ring 19 via a limiting spring, and a plurality of fixing posts 22 fixedly disposed in a circumferential array on the bottom end face of the first sealing ring 16. When the vibrating ring 19 rotates, the fixing posts 22 contact the rotating metal ball 21, pushing the metal ball 21 to move into the telescopic groove 20 and compressing the limiting spring. After the metal ball 21 rotates through the fixing posts 22, the limiting spring returns to its normal state, pushing the metal ball 21 to impact the opening of the telescopic groove 20.
[0031] In this embodiment, when the feeding slot 11 is opened and lime powder is about to fall into the solution in the reaction tank 1, the second rotating structure (such as a motor-driven rotating shaft) starts working, driving the vibrating ring 19 to rotate along the bottom end of the first sealing ring 16. As the vibrating ring 19 rotates, the metal ball 21, located at the opening of the telescopic groove 20 on the side of the vibrating ring 19, gradually approaches and contacts the fixed post 22 fixedly located on the bottom end face of the first sealing ring 16. Due to the obstruction of the fixed post 22, the metal ball 21 cannot continue to move along its original path. Under the push of the fixed post 22, the metal ball 21 moves into the telescopic groove 20, while compressing the limiting spring. The vibrating ring 19 continues to rotate, and the metal ball 21 gradually rotates through the fixed post 22 while the limiting spring is compressed. After the metal ball 21 rotates through the fixed post 22, the limiting spring is no longer under the pressure of the fixed post 22 and begins to return to its normal state. Under the action of the elastic force of the limiting spring, the metal ball 21 is rapidly pushed and impacts the opening of the telescopic groove 20, thereby generating vibration. As the vibrating ring 19 rotates continuously, the above process repeats periodically, generating continuous vibration. The vibration generated by the rotation of the vibrating ring 19 is transmitted to the feeding tray 7, thereby causing the lime powder about to fall into the solution through the feeding slot 11 to be vibrated. This vibration can further disperse the lime powder, preventing it from clumping together and falling into the solution, increasing the contact area between the lime powder and the hydrogen fluoride mixed solution, thus improving the reaction efficiency between the lime powder and the anions in the solution, resulting in better anion removal. During the lime powder addition process, if lime powder accumulates or blocks near the feeding slot 11 or the storage tank, the vibration can break the binding force between the lime powder particles, allowing the lime powder to fall smoothly into the solution through the feeding slot 11, ensuring the smooth progress of the lime powder addition process and avoiding production delays due to blockage. The energy generated by the vibration is transferred to the solution in the reaction tank 1, which to some extent stirs the solution, assisting the stirring components to mix the solution more evenly, further promoting the reaction between the lime powder and the anions in the solution, and improving the sufficiency and thoroughness of the reaction.
[0032] like Figure 4 As shown, the second rotating structure uses bolts, which are threaded through the vibrating ring 19. The vibrating ring 19 is sleeved on the stirring rod 8 and abuts against the stirring rod 8 through the end of the bolts. This makes it easy to quickly fix the vibrating ring 19 to the stirring rod 8, avoiding the need to add a new drive source to drive the vibrating ring 19 to rotate. The rotation of the stirring rod 8 can synchronously drive the vibrating ring 19 to rotate.
[0033] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A feeding device for the removal of anhydrous hydrogen fluoride anions, comprising a reaction vessel (1) with an internal stirring assembly, and a feeding mechanism for adding lime powder to the inside of the reaction vessel (1), wherein a sealed lid (4) is provided on the opening of the reaction vessel (1), characterized in that, The feeding mechanism includes a feeding bin (5) set on the can cover (4), a feeding tray (7) set at the can opening, and a feeding control component set on the feeding tray (7); Lime powder is placed in the feed hopper (5) and the lime powder is added to the feed tray (7). The feed control component controls the lime powder to be added evenly to the surface of the hydrogen fluoride mixed solution in the reaction tank (1).
2. The feeding device for anhydrous hydrogen fluoride anion removal according to claim 1, characterized in that: The top of the feeding tray (7) is provided with a feeding groove (10), the bottom wall of the feeding groove (10) is provided with multiple storage grooves in a circular array, and the bottom wall of the storage groove is provided with a feeding groove hole (11). The feeding control component includes a rotating plate (13) set in the feeding groove (10) through a first rotating structure, and a sealing element set on the bottom end of the feeding tray (7) to control the sealing or opening of the feeding groove hole (11); The first rotating structure drives the rotating plate (13) to rotate, pushing the lime powder accumulated in the feeding trough (10) into multiple storage troughs.
3. The feeding device for anhydrous hydrogen fluoride anion removal according to claim 2, characterized in that: The sealing element includes a first sealing ring (16) rotatably disposed at the middle of the bottom end of the feeding tray (7), a second sealing ring (17) sleeved on the first sealing ring (16), multiple sealing strips (18) disposed between the first sealing ring (16) and the second sealing ring (17), and a control structure disposed on the feeding tray (7) and controlling the second sealing ring (17) to rotate. The sides of the multiple sealing strips (18) are respectively attached to the opening positions of multiple feeding slots (11).
4. The feeding device for anhydrous hydrogen fluoride anion removal according to claim 3, characterized in that: The control structure includes a driven rack (23) fixedly mounted on the inner ring of the second sealing ring (17) and located between two adjacent sealing strips (18), and a drive gear (24) meshing with the driven rack (23) and rotatably mounted on the bottom end of the feeding tray (7).
5. The feeding device for anhydrous hydrogen fluoride anion removal according to claim 3 or 4, characterized in that: The sealing element also includes a vibrating ring (19) disposed on the bottom end of the first sealing ring (16) via a second rotating structure, a metal ball (21) passing through the opening of the expansion groove (20) on the side of the vibrating ring (19) via a limiting spring, and a plurality of fixing posts (22) fixedly disposed in a circumferential array on the bottom end face of the first sealing ring (16). When the vibrating ring (19) rotates, the fixing posts (22) contact the rotating metal ball (21), pushing the metal ball (21) to move into the expansion groove (20) and compressing the limiting spring. After the metal ball (21) rotates through the fixing posts (22), the limiting spring returns to its normal state, pushing the metal ball (21) to impact the opening of the expansion groove (20).
6. The feeding device for anhydrous hydrogen fluoride anion removal according to claim 1, characterized in that: The stirring assembly includes a stirring rod (8) that passes through the interior of the reaction vessel (1) along the axial direction of the reaction vessel (1), and stirring blades (15) that are disposed inside the reaction vessel (1) and detachably mounted on the stirring rod (8).