A sulfur removal separation device for anhydrous hydrogen fluoride production

Abstract

The utility model discloses a kind of sulfur removal separation devices of anhydrous hydrogen fluoride production, including reaction tank, rotatable gas inlet main pipe of rotation embedded in the top of reaction tank, the lower end of the gas inlet main pipe extends to the inside of reaction tank and is connected with multiple circumferentially distributed gas inlet branch pipe, the bottom of the gas inlet branch pipe is provided with opening, the opening is fixedly connected with symmetrically distributed stopper, rotationally inserted between two the stopper there is shaft, the shaft is fixedly connected with vane.The utility model in, by gas inlet main pipe, hydrofluoric acid gas is passed into, then by multiple gas inlet branch pipe, it is discharged, so that the uniform gas inlet is realized, so that hydrogen peroxide in region is fully utilized, and due to the effect of air pressure, the vane inside opening rotates, it is helpful to hydrogen peroxide to be stirred, so that hydrogen peroxide is fully reacted with sulfide in hydrofluoric acid gas, the local reaction saturation problem of hydrogen peroxide can be effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of anhydrous hydrogen fluoride preparation technology, specifically to a desulfurization separation device for the production of anhydrous hydrogen fluoride. Background Technology

[0002] Anhydrous hydrogen fluoride is widely used in the nuclear energy, chemical, and petroleum industries. It is also a basic raw material for producing elemental fluorine, various fluorinated refrigerants, inorganic fluorides, and various organic fluorides. It can be formulated into aqueous hydrofluoric acid for various applications, and used as a catalyst in graphite manufacturing and the production of organic compounds.

[0003] Sulfides are generated during the production of anhydrous hydrogen fluoride. These sulfides are mixed in the anhydrous hydrogen fluoride and need to be removed using a desulfurization device. The desulfurization device reacts with the sulfide gas to achieve the desulfurization work. For example, oxidants such as potassium permanganate and hydrogen peroxide are used to react with the sulfur-containing gas.

[0004] However, when anhydrous hydrofluoric acid gas is introduced into a container containing hydrogen peroxide, the hydrofluoric acid gas only comes into contact with hydrogen peroxide near the inlet due to the fixed position of the inlet pipe. This results in the depletion of reactants in that area, while the hydrogen peroxide in other areas is not fully utilized. Consequently, the hydrofluoric acid gas cannot be evenly dispersed throughout the liquid phase, and the reaction rate is limited by the gas-liquid contact area. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this invention provides a desulfurization separation device for the production of anhydrous hydrogen fluoride, which solves the problems mentioned in the background section.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model is implemented through the following technical solution: a desulfurization separation device for the production of anhydrous hydrogen fluoride, comprising a reaction tank and a rotatable gas inlet main pipe rotatably embedded on the top of the reaction tank. The lower end of the gas inlet main pipe extends into the interior of the reaction tank and is connected to a plurality of circumferentially distributed gas inlet branch pipes. An opening is provided at the bottom of each gas inlet branch pipe, and symmetrically distributed baffles are fixedly connected to the opening. A rotating shaft is rotatably inserted between two of the baffles, and blades are fixedly connected to the rotating shaft.

[0009] Preferably, a lower baffle is fixedly connected to the inner wall of the reaction vessel, and the surface of the lower baffle is provided with circumferentially distributed lower vents. An upper baffle is fixedly connected to the main air inlet pipe, and the surface of the upper baffle is provided with a through upper vent. When the upper vent and the lower vent are partially connected, exhaust is performed.

[0010] Preferably, the main intake pipe is further fixedly connected with a plurality of circumferentially distributed stirring blades, which are located below the lower air inlet.

[0011] Preferably, a motor is fixedly installed on the top of the reaction vessel, a drive gear is fixedly connected to the output end of the motor, and a driven gear is coaxially fixedly sleeved on the main air intake pipe, with the driven gear meshing with the drive gear.

[0012] Preferably, a drain pipe is connected to the side wall of the reaction vessel, the drain pipe is located near the bottom of the reaction vessel, and a valve is installed on the drain pipe.

[0013] Preferably, an exhaust pipe is connected to the side wall of the reaction vessel, the exhaust pipe is located near the top of the reaction vessel, and the exhaust pipe is located above the upper baffle plate.

[0014] (III) Beneficial Effects

[0015] This utility model provides a desulfurization separation device for the production of anhydrous hydrogen fluoride, which has the following beneficial effects:

[0016] 1. In this utility model, hydrofluoric acid gas is introduced through the main intake pipe and then discharged through multiple intake manifolds, thus achieving uniform air intake and making full use of the hydrogen peroxide in the area. Furthermore, due to the gas pressure, the blades inside the opening rotate, which helps to agitate the hydrogen peroxide and allow it to fully react with the sulfides in the hydrofluoric acid gas, effectively solving the problem of local reaction saturation of hydrogen peroxide.

[0017] 2. In this invention, by driving the intake pipe to rotate, the stirring blades rotate, which also promotes the flow of hydrogen peroxide, allowing the hydrogen peroxide to fully react with the sulfides in the hydrofluoric acid gas. The hydrofluoric acid gas that has completed the desulfurization reaction needs to pass through the lower and upper vents in sequence, and finally be discharged from the device through the exhaust pipe. Because the upper baffle rotates, the upper and lower vents are intermittently connected, which can increase the contact time between the hydrogen fluoride gas and the hydrogen peroxide, thus fully realizing the desulfurization work. Attached Figure Description

[0018] Figure 1 This is a front-view perspective structural diagram of a desulfurization separation device for the production of anhydrous hydrogen fluoride proposed in this utility model.

[0019] Figure 2 for Figure 1 Sectional view of the structure along direction aa;

[0020] Figure 3 for Figure 1 BB-shaped cross-sectional view of the structure;

[0021] Figure 4 for Figure 2 Enlarged structural diagram at point A;

[0022] Figure 5 for Figure 3 Enlarged structural diagram at point B.

[0023] In the diagram: 1. Reaction vessel; 2. Main intake pipe; 3. Intake branch pipe; 301. Opening; 4. Blade; 5. Baffle; 6. Shaft; 7. Upper baffle plate; 701. Upper vent; 8. Lower baffle plate; 801. Lower vent; 9. Stirring blade; 10. Motor; 11. Drive gear; 12. Driven gear; 13. Drain pipe; 14. Valve; 15. Exhaust pipe. Detailed Implementation

[0024] 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. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0025] Please see Figures 2 to 5 This utility model provides a technical solution: a desulfurization separation device for the production of anhydrous hydrogen fluoride, including a reaction tank 1, a rotatable air inlet main pipe 2 rotatably embedded on the top of the reaction tank 1, the lower end of the air inlet main pipe 2 extending into the interior of the reaction tank 1 and connected to a plurality of circumferentially distributed air inlet branch pipes 3, an opening 301 at the bottom of the air inlet branch pipe 3, symmetrically distributed baffles 5 fixedly connected at the opening 301, a rotating shaft 6 rotatably inserted between two baffles 5, and blades 4 fixedly connected on the rotating shaft 6.

[0026] During operation, sulfur-containing hydrofluoric acid gas is introduced into the main intake pipe 2, and then the hydrofluoric acid gas is discharged through multiple intake manifolds 3. A portion of the gas can also be discharged through the opening 301, thus achieving uniform air intake. The sulfides react with hydrogen peroxide, making full use of the hydrogen peroxide in the area. Furthermore, due to the gas pressure, the blades 4 inside the opening 301 rotate, which helps to agitate the hydrogen peroxide, allowing it to fully react with the sulfides in the hydrofluoric acid gas. This effectively solves the problem of localized saturation of hydrogen peroxide.

[0027] See Figure 2 A lower baffle plate 8 is fixedly connected to the inner wall of the reaction vessel 1. The surface of the lower baffle plate 8 is provided with a circumferentially distributed lower vent 801. An upper baffle plate 7 is fixedly connected to the air inlet pipe 2. The surface of the upper baffle plate 7 is provided with a through upper vent 701. When the upper vent 701 is partially connected to the lower vent 801, exhaust is performed.

[0028] When the intake manifold 2 rotates, it also drives the upper baffle 7 to rotate. Therefore, the upper vent 701 and the lower vent 801 are intermittently connected. When they are not connected, the contact time between hydrogen fluoride gas and hydrogen peroxide can be increased, so as to fully achieve desulfurization. When they are connected, the treated hydrogen fluoride gas passes through the lower vent 801 and the upper vent 701 in sequence, and is finally discharged through the exhaust pipe 15.

[0029] See Figure 2 Multiple circumferentially distributed stirring blades 9 are also fixedly connected to the intake manifold 2, and the stirring blades 9 are located below the lower air inlet 801.

[0030] By driving the intake manifold 2 to rotate, the stirring blade 9 can also be rotated, which can also promote the flow of hydrogen peroxide, allowing the hydrogen peroxide to fully react with the sulfides in the hydrofluoric acid gas.

[0031] The stirring blade 9 is made of fluoroplastic (polytetrafluoroethylene), which is resistant to almost all concentrations of hydrogen peroxide and hydrofluoric acid gas, thus having good corrosion resistance and improving service life. In addition, polytetrafluoroethylene has anti-scaling properties: PTFE has low surface energy, making it difficult for sulfide reaction products (such as sulfates and fluorinated sulfides) to adhere, which can reduce the risk of corrosion caused by scaling on the surface of the stirring blade 9.

[0032] See Figure 1 A motor 10 is fixedly installed on the top of the reaction vessel 1. A drive gear 11 is fixedly connected to the output end of the motor 10. A driven gear 12 is coaxially fixedly sleeved on the air intake pipe 2. The driven gear 12 is meshed with the drive gear 11.

[0033] By starting the motor 10, the driving gear 11 is driven to rotate, which in turn drives the driven gear 12 to rotate. The driven gear 12 then drives the intake manifold 2 to rotate, which in turn drives the stirring blade 9 and the intake manifold 3 to rotate. The rotation of the stirring blade 9 helps to drive the flow of hydrogen peroxide inside the reaction vessel 1, improving the reaction effect with sulfides. Secondly, the rotating intake manifold 3 can evenly exhaust gas within a circumferential range, which also improves the contact between sulfides and hydrogen peroxide.

[0034] See Figure 1 A drain pipe 13 is connected to the side wall of the reaction tank 1. The drain pipe 13 is located near the bottom of the reaction tank 1 and a valve 14 is installed on the drain pipe 13. In addition, a feed pipe is also connected to the side wall of the reaction tank 1 for adding hydrogen peroxide as raw material. The lower end of the feed pipe should be located below the lower baffle plate 8.

[0035] After the desulfurization work is completed, valve 14 is opened to discharge the residual hydrogen peroxide inside the reaction tank 1 through drain pipe 13.

[0036] See Figure 1The side wall of the reaction vessel 1 is connected to an exhaust pipe 15, which is located near the top of the reaction vessel 1 and above the upper baffle 7.

[0037] After being processed by this device, the hydrogen fluoride gas passes sequentially through the lower vent 801 and the upper vent 701, and is finally discharged through the exhaust pipe 15 to the next process (such as hydrogen fluoride gas drying). The next process is not the focus of this paper, so it will not be described in detail.

[0038] 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 desulfurization separation device for the production of anhydrous hydrogen fluoride, characterized in that: The system includes a reaction vessel (1) and a rotatable main air intake pipe (2) rotatably embedded on the top of the reaction vessel (1). The lower end of the main air intake pipe (2) extends into the interior of the reaction vessel (1) and is connected to a plurality of circumferentially distributed air intake branch pipes (3). An opening (301) is provided at the bottom of the air intake branch pipe (3). Symmetrically distributed baffles (5) are fixedly connected to the opening (301). A rotating shaft (6) is rotatably inserted between two of the baffles (5). A blade (4) is fixedly connected to the rotating shaft (6).

2. The desulfurization separation device for anhydrous hydrogen fluoride production according to claim 1, characterized in that: The inner wall of the reaction vessel (1) is fixedly connected to a lower baffle plate (8), and the surface of the lower baffle plate (8) is provided with circumferentially distributed lower vents (801). The upper baffle plate (7) is fixedly connected to the main air inlet pipe (2), and the surface of the upper baffle plate (7) is provided with a through upper vent (701). When the upper vent (701) and the lower vent (801) are partially connected, exhaust is performed.

3. The desulfurization separation device for anhydrous hydrogen fluoride production according to claim 1, characterized in that: The intake manifold (2) is also fixedly connected with a plurality of circumferentially distributed stirring blades (9), which are located below the lower air inlet (801).

4. The desulfurization separation device for anhydrous hydrogen fluoride production according to claim 1, characterized in that: A motor (10) is fixedly installed on the top of the reaction vessel (1). A drive gear (11) is fixedly connected to the output end of the motor (10). A driven gear (12) is coaxially fixedly sleeved on the main air intake pipe (2). The driven gear (12) meshes with the drive gear (11).

5. The desulfurization separation device for anhydrous hydrogen fluoride production according to claim 1, characterized in that: The side wall of the reaction vessel (1) is connected to a drain pipe (13), which is located near the bottom of the reaction vessel (1) and is equipped with a valve (14).

6. The desulfurization separation device for anhydrous hydrogen fluoride production according to claim 1, characterized in that: The side wall of the reaction vessel (1) is connected to an exhaust pipe (15), which is located near the top of the reaction vessel (1) and above the upper baffle (7).

Images