A reflux device for an aluminum fluoride reaction vessel

Abstract

This utility model discloses a reflux device for an aluminum fluoride reaction vessel, including a reaction vessel body. An exhaust pipe is installed on one side of the top of the reaction vessel body. A support is fixed to the top of the reaction vessel body, and a condenser tube is installed inside the support. A first spiral tube and a second spiral tube are respectively installed inside the condenser tube. A liquid outlet pipe is installed at the top of the condenser tube, and a liquid inlet pipe is installed at the bottom. The bottom end of the first spiral tube extends below the condenser tube and is equipped with a reflux rod. The bottom end of the second spiral tube extends below the condenser tube and is equipped with a circulation pipe. This utility model, by setting up a circulating condensation structure, allows volatile substances to circulate within the first and second spiral tubes, preventing accumulation and localized temperature increases. The volatile substances are always in a flowing state and in full contact with the circulating cooling medium, thereby improving the condensation effect.

Description

Technical Field

[0001] This utility model relates to the field of aluminum fluoride preparation technology, specifically to a reflux device for an aluminum fluoride reaction vessel. Background Technology

[0002] Aluminum fluoride is an inorganic compound with the chemical formula AlF3. It is a colorless or white crystalline solid, insoluble in water, acids, and alkalis. It is very stable and can be hydrolyzed when heated. It is mainly used in aluminum smelting.

[0003] Currently, aluminum fluoride is typically prepared using aluminum hydroxide and fluorosilicic acid. During the reaction, volatile substances (such as HF and H2O) are lost, leading to a reduction in raw material loss. Therefore, a reflux device needs to be installed on the reaction vessel to condense and return the volatile substances to the reaction system. At the same time, the reflux device controls the heating rate in the reaction system to ensure thorough mixing of the reactants, thereby controlling the reaction efficiency. However, the reflux device is generally a single double-layer condenser tube structure. The lower end of the double-layer condenser tube is connected to the reaction vessel, while the upper end is sealed. As the reaction continues, uncondensed volatile substances accumulate inside the condenser tube, causing local temperature increases. Under these conditions, the condensation effect is often not ideal, thus requiring improvement. Utility Model Content

[0004] The purpose of this invention is to provide a reflux device for an aluminum fluoride reaction vessel to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a reflux device for an aluminum fluoride reaction tank, comprising a reaction tank body, an exhaust pipe installed on one side of the top of the reaction tank body, a bracket fixed to the top of the reaction tank body, and a condenser tube installed inside the bracket, a first spiral tube and a second spiral tube respectively installed inside the condenser tube, the top ends of the first spiral tube and the second spiral tube being connected by a U-shaped tube, a liquid outlet pipe installed at the top of the condenser tube, and a liquid inlet pipe installed at the bottom of the condenser tube, the bottom end of the first spiral tube extending below the condenser tube and being fitted with a reflux rod, the bottom end of the reflux rod extending into the interior of the exhaust pipe, and the bottom end of the second spiral tube extending below the condenser tube and being fitted with a circulation pipe.

[0006] Preferably, the condenser tube has a U-shaped structure, and the bottom of the condenser tube is connected through a liquid guide tube.

[0007] Preferably, the circulation pipe is inclined, and one end of the circulation pipe is connected to the return rod.

[0008] Preferably, a one-way check valve is installed on one side inside the circulation pipe, and one end of the one-way check valve is provided with an inlet and the other end of the one-way check valve is provided with an outlet. The flow direction of the one-way check valve is from the inlet to the outlet, so that volatile substances can only flow from the circulation pipe to the return rod.

[0009] Preferably, a sealing airbag is adhered to the inner wall of the top of the exhaust pipe, and the sealing airbag has an annular structure.

[0010] Preferably, an inflation tube is installed on the outer wall of the top of the exhaust pipe, and one end of the inflation tube extends into the interior of the exhaust pipe and communicates with the sealing airbag. A venting tube is installed at the top of the inflation tube. Squeezing the inflation ball allows air to enter through the one-way intake valve and then through the inflation tube into the sealing airbag. After the sealing airbag is inflated, it expands and seals the connection between the exhaust pipe and the return rod. This sealing structure improves the sealing performance and reduces the possibility of gas leakage.

[0011] Preferably, an inflatable ball is installed at the bottom end of the inflation tube, and a one-way air inlet valve is installed at the bottom end of the inflatable ball.

[0012] Preferably, a stirring paddle is installed inside the reaction vessel, and a motor is installed at the top of the reaction vessel. The output end of the motor is fixedly connected to the stirring paddle, and the motor drives the stirring paddle to rotate and stir, so that the reaction is uniform.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] The condenser is mounted above the reaction vessel via a bracket. A reflux rod is inserted into the exhaust pipe. Aluminum hydroxide and fluorosilicic acid react in the reaction vessel. Volatile substances enter the first spiral tube inside the condenser from the exhaust pipe and the reflux rod, then enter the second spiral tube from the U-shaped tube, and finally return to the first spiral tube from the circulation pipe. The circulating cooling medium, such as tap water or ethylene glycol, cools the volatile substances, causing the condensate to flow back to the reaction system from the reflux pipe, reducing raw material loss. Because the volatile substances circulate in the first and second spiral tubes, accumulation that could lead to localized temperature increases is prevented. The volatile substances are always in a flowing state and in full contact with the circulating cooling medium, thus improving the condensation effect. Attached Figure Description

[0015] Figure 1 This is a frontal cross-sectional view of the present invention.

[0016] Figure 2 This is an enlarged structural schematic diagram of the condenser tube of this utility model;

[0017] Figure 3 This is a partially enlarged structural diagram of the circulation tube of this utility model;

[0018] Figure 4 For the present utility model Figure 1 Enlarged structural diagram at point A in the middle;

[0019] Figure 5 This is a front view schematic diagram of the appearance structure of this utility model.

[0020] In the diagram: 1. Reaction vessel; 2. Agitator; 3. Motor; 4. Support; 5. Condenser; 6. Liquid outlet pipe; 7. Liquid inlet pipe; 8. Exhaust pipe; 9. First spiral tube; 10. Second spiral tube; 11. U-shaped tube; 12. Circulation pipe; 13. Liquid guide pipe; 14. Reflux rod; 15. One-way check valve; 1501. Inlet; 1502. Outlet; 16. Sealing airbag; 17. Venting pipe; 18. Inflating pipe; 19. Inflatable ball; 20. One-way air inlet valve. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Therefore, the following detailed description of the embodiments of this utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but merely to illustrate selected embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0023] Please see Figure 1-5 An embodiment of this utility model provides: a reflux device for an aluminum fluoride reaction tank, including a reaction tank body 1, an exhaust pipe 8 installed on one side of the top of the reaction tank body 1, a bracket 4 fixed to the top of the reaction tank body 1, and a condenser tube 5 installed inside the bracket 4. A first spiral tube 9 and a second spiral tube 10 are respectively installed inside the condenser tube 5, and the top ends of the first spiral tube 9 and the second spiral tube 10 are connected by a U-shaped tube 11. A liquid outlet pipe 6 is installed at the top of the condenser tube 5, and a liquid inlet pipe 7 is installed at the bottom end of the condenser tube 5. The bottom end of the first spiral tube 9 extends to the bottom of the condenser tube 5 and is equipped with a reflux rod 14. The bottom end of the reflux rod 14 extends to the inside of the exhaust pipe 8. The bottom end of the second spiral tube 10 extends to the bottom of the condenser tube 5 and is equipped with a circulation pipe 12.

[0024] The condenser tube 5 has a U-shaped structure, and the bottom of the condenser tube 5 is connected through the liquid guide tube 13;

[0025] Specifically, the condenser 5 is installed above the reaction vessel 1 via the bracket 4, and the reflux rod 14 is inserted into the exhaust pipe 8. Then, aluminum hydroxide and fluorosilicic acid react in the reaction vessel 1. The motor 3 drives the stirring paddle 2 to rotate and stir, so that the reaction is uniform. During the reaction, volatile substances enter the first spiral tube 9 inside the condenser 5 from the exhaust pipe 8 and the reflux rod 14, then enter the second spiral tube 10 from the U-shaped tube 11, and then return to the first spiral tube 9 from the circulation pipe 12.

[0026] A circulating cooling medium, such as tap water or ethylene glycol, enters the condenser 5 through the inlet pipe 7. The liquid guide pipe 13 keeps the inside of the condenser 5 connected. The cooling medium is discharged from the outlet pipe 6. The cooling medium cools the volatile substances, causing the condensate to flow back to the reaction system through the return pipe 14, reducing raw material loss. Since the volatile substances circulate in the first spiral tube 9 and the second spiral tube 10, accumulation that could lead to local temperature rise can be prevented. The volatile substances are always in a flowing state and in full contact with the circulating cooling medium, thereby improving the condensation effect.

[0027] The circulation pipe 12 is inclined, and one end of the circulation pipe 12 is connected to the return rod 14. A one-way check valve 15 is installed on one side inside the circulation pipe 12. One end of the one-way check valve 15 is provided with an inlet 1501, and the other end of the one-way check valve 15 is provided with an outlet 1502. The flow direction of the one-way check valve 15 is from the inlet 1501 to the outlet 1502, so that volatile substances can only flow from the circulation pipe 12 to the return rod 14.

[0028] A sealing airbag 16 is adhered to the inner wall of the top of the exhaust pipe 8, and the sealing airbag 16 has a ring structure; an inflation tube 18 is installed on the outer wall of the top of the exhaust pipe 8, and one end of the inflation tube 18 extends into the interior of the exhaust pipe 8 and communicates with the sealing airbag 16, and a venting tube 17 is installed at the top of the inflation tube 18; an inflation ball 19 is installed at the bottom of the inflation tube 18, and a one-way air intake valve 20 is installed at the bottom of the inflation ball 19.

[0029] Specifically, squeezing the inflation ball 19 allows air to enter through the one-way air intake valve 20 and then through the inflation tube 18 into the sealing airbag 16. After the sealing airbag 16 is inflated, it expands to seal the connection between the exhaust pipe 8 and the return rod 14. This sealing structure improves the sealing performance and reduces gas leakage.

[0030] The reaction vessel 1 is equipped with a stirring paddle 2 inside, and a motor 3 is installed at the top of the reaction vessel 1. The output end of the motor 3 is fixedly connected to the stirring paddle 2.

[0031] In this embodiment, the following steps are taken: First, the condenser tube 5 is installed above the reaction vessel 1 via a bracket 4. The reflux rod 14 is inserted into the exhaust pipe 8. The inflation ball 19 is squeezed to allow air to enter through the one-way air inlet valve 20 and then through the inflation pipe 18 into the sealing bladder 16. After the sealing bladder 16 is inflated, it expands to seal the connection between the exhaust pipe 8 and the reflux rod 14. This sealing structure improves the sealing performance and reduces gas leakage. Then, aluminum hydroxide and fluorosilicic acid react in the reaction vessel 1. The motor 3 drives the stirring paddle 2 to rotate and stir, ensuring a uniform reaction. During the reaction, volatile substances enter the condenser tube 5 from the exhaust pipe 8 and the reflux rod 14. In the spiral tube 9, the fluid then enters the second spiral tube 10 through the U-shaped tube 11, and then returns to the first spiral tube 9 through the circulation tube 12. The circulating cooling medium, such as tap water or ethylene glycol, enters the condenser tube 5 through the liquid inlet pipe 7. The liquid guide pipe 13 keeps the interior of the condenser tube 5 connected. The cooling medium is discharged from the liquid outlet pipe 6. The cooling medium cools the volatile substances, causing the condensate to flow back to the reaction system through the return pipe 14, reducing raw material loss. Because the volatile substances circulate in the first spiral tube 9 and the second spiral tube 10, accumulation that could lead to local temperature increases can be prevented. The volatile substances are always in a flowing state and in full contact with the circulating cooling medium, thereby improving the condensation effect.

[0032] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

Claims

1. A reflux device for an aluminum fluoride reaction vessel, comprising a reaction vessel body (1), wherein an exhaust pipe (8) is installed on one side of the top of the reaction vessel body (1), characterized in that, The top of the reaction vessel (1) is fixed with a bracket (4), and a condenser tube (5) is installed inside the bracket (4). A first spiral tube (9) and a second spiral tube (10) are installed inside the condenser tube (5), and the top ends of the first spiral tube (9) and the second spiral tube (10) are connected by a U-shaped tube (11). A liquid outlet pipe (6) is installed at the top end of the condenser tube (5), and a liquid inlet pipe (7) is installed at the bottom end of the condenser tube (5). The bottom end of the first spiral tube (9) extends to the bottom of the condenser tube (5) and is equipped with a reflux rod (14). The bottom end of the reflux rod (14) extends to the inside of the exhaust pipe (8). The bottom end of the second spiral tube (10) extends to the bottom of the condenser tube (5) and is equipped with a circulation pipe (12).

2. The reflux device for an aluminum fluoride reaction vessel according to claim 1, characterized in that: The condenser tube (5) has a U-shaped structure, and the bottom of the condenser tube (5) is connected through a liquid guide tube (13).

3. The reflux device for an aluminum fluoride reaction vessel according to claim 1, characterized in that: The circulation pipe (12) is inclined, and one end of the circulation pipe (12) is connected to the return rod (14).

4. The reflux device for an aluminum fluoride reaction vessel according to claim 1, characterized in that: A one-way check valve (15) is installed on one side inside the circulation pipe (12), and one end of the one-way check valve (15) is provided with an inlet (1501), and the other end of the one-way check valve (15) is provided with an outlet (1502).

5. The reflux device for an aluminum fluoride reaction vessel according to claim 1, characterized in that: A sealing airbag (16) is adhered to the inner wall of the top of the exhaust pipe (8), and the sealing airbag (16) has an annular structure.

6. The reflux device for an aluminum fluoride reaction vessel according to claim 1, characterized in that: An inflation tube (18) is installed on the outer wall of the top of the exhaust pipe (8), and one end of the inflation tube (18) extends into the interior of the exhaust pipe (8) and communicates with the sealing airbag (16), and a venting tube (17) is installed at the top of the inflation tube (18).

7. The reflux device for an aluminum fluoride reaction vessel according to claim 6, characterized in that: An inflatable ball (19) is installed at the bottom end of the inflation tube (18), and a one-way air inlet valve (20) is installed at the bottom end of the inflatable ball (19).

8. The reflux device for an aluminum fluoride reaction vessel according to claim 1, characterized in that: The reaction vessel (1) is equipped with a stirring paddle (2) inside, and a motor (3) is installed at the top of the reaction vessel (1), and the output end of the motor (3) is fixedly connected to the stirring paddle (2).

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