Dryer for the production of pentafluoroethane

Abstract

The utility model discloses a kind of dryers for pentafluoroethane production, it is related to pentafluoroethane production drying technical field, including support, drying cylinder and filter cylinder, support top is equipped with drying cylinder, support inside is equipped with filter cylinder, drying cylinder inside rotation is equipped with drying agent disc in the upper part of isolation chamber, drying cylinder outer wall on the upper side of drying agent disc is equipped with drying agent feed pipe, drying cylinder inside upper side is equipped with gas distribution plate, drying cylinder outer wall on the upper side of gas distribution plate is equipped with pentafluoroethane feed pipe, rotation is equipped with rotating shaft in drying cylinder inside, rotating shaft lower end is equipped with connecting rod, and connecting rod both ends are connected with drying agent disc inside upper side;The utility model is connected by rotatingly setting the drying agent disc in the inside of drying cylinder with rotating shaft lower end rotatingly setting in the inside of drying cylinder, i. e. it can be realized that it is beneficial to rotating shaft to drive drying cylinder rotation, pentafluoroethane in drying cylinder will be driven to disturb in the process of drying agent disc rotation, so as to pentafluoroethane full drying agent contact carries out drying.

Description

Technical Field

[0001] This utility model relates to the field of drying technology for pentafluoroethane production, and in particular to a dryer for pentafluoroethane production. Background Technology

[0002] The main raw materials for pentafluoroethane are 1,1,1,2-tetrafluoroethane (HFC-134a) and hydrofluoric acid (HF). HFC-134a and HF are mixed in a specific ratio and added to a reaction vessel at a predetermined molar ratio. An appropriate amount of catalyst is introduced into the reaction vessel, and the reaction temperature is controlled within the range of 80-100℃ by heating the vessel. The catalyst promotes the fluorination reaction of HFC-134a and HF to produce pentafluoroethane. The product in the reaction vessel is then separated using separation technology to obtain crude pentafluoroethane.

[0003] Drying is a crucial step in the refining of pentafluoroethane, primarily used to remove residual moisture that may have remained during fractionation. Existing dryers utilize a method where a desiccant is placed inside a container, the fractionated pentafluoroethane is slowly poured into the container, the container is sealed, and the mixture is left to stand for a period of time to allow the desiccant to absorb moisture. However, this drying process suffers from low efficiency, as the pentafluoroethane does not readily contact the desiccant for proper drying. Therefore, this invention proposes a dryer for pentafluoroethane production to address the shortcomings of existing technologies. Utility Model Content

[0004] To address the aforementioned problems, the purpose of this invention is to provide a dryer for pentafluoroethane production. By connecting a desiccant disc, which is rotatably disposed inside the drying cylinder, to the lower end of a rotating shaft, the rotating shaft drives the drying cylinder to rotate. During the rotation of the desiccant disc, the pentafluoroethane in the drying cylinder is disturbed, and the desiccant also shakes to a certain extent during the rotation of the desiccant disc, so as to ensure that the pentafluoroethane fully contacts the desiccant for drying, thereby improving the drying efficiency.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A dryer for pentafluoroethane production includes a support frame, a drying cylinder, and a filter cylinder. The drying cylinder is located at the top of the support frame, and the filter cylinder is located inside the support frame. An isolation chamber is located at the bottom of the drying cylinder, and a filter discharge pipe is located inside the isolation chamber. The lower end of the filter discharge pipe is connected to the inside of the filter cylinder. A desiccant disc is rotatably located inside the drying cylinder above the isolation chamber. A desiccant inlet pipe is located on the outer wall of the drying cylinder above the desiccant disc. A connecting pipe is located at the bottom of the desiccant disc, and the lower end of the connecting pipe is connected to the upper end of the filter discharge pipe through a sealed bearing. A gas distribution plate is located at the top of the drying cylinder, and a pentafluoroethane inlet pipe is located on the outer wall of the drying cylinder above the gas distribution plate. A rotating shaft is rotatably located inside the drying cylinder, and a connecting rod is located at the lower end of the rotating shaft. Both ends of the connecting rod are connected to the top of the desiccant disc.

[0007] A further improvement is made in that: the upper end of the rotating shaft extends to the top and is provided with a first bevel gear; the top of the drying cylinder is provided with a reduction gearbox; the output end of the reduction gearbox is provided with a second bevel gear; the second bevel gear meshes with the first bevel gear; the top of the reduction gearbox is provided with a motor; and the output end of the motor is connected to the input end of the reduction gearbox.

[0008] A further improvement is that: the outer wall of the rotating shaft is provided with turbulence blades, and multiple sets of turbulence blades are provided in pairs.

[0009] A further improvement is that a wire mesh demister is provided above the inside of the filter cartridge, and the wire mesh demister is detachably installed inside the filter cartridge.

[0010] A further improvement is that the lower end of the filter cylinder has a bucket-shaped structure, and a desiccant discharge pipe is provided at the bottom of the filter cylinder.

[0011] A further improvement is that: a first valve is provided on the desiccant inlet pipe, a second valve is provided on the pentafluoroethane inlet pipe, a third valve is provided on the filter discharge pipe, and a fourth valve is provided on the desiccant discharge pipe.

[0012] The beneficial effects of this utility model are as follows: By connecting the desiccant disc, which is rotatably set inside the drying cylinder, to the lower end of the rotating shaft, which is also rotatably set inside the drying cylinder, the rotating shaft can drive the drying cylinder to rotate. During the rotation of the desiccant disc, the pentafluoroethane in the drying cylinder will be disturbed, and the desiccant will also shake to a certain extent during the rotation of the desiccant disc, so as to allow the pentafluoroethane to fully contact the desiccant for drying, thereby improving the drying efficiency.

[0013] This invention further agitates the pentafluoroethane by setting two pairs of turbulence-inducing blades on the outer wall of the rotating shaft, so that the pentafluoroethane can fully contact the desiccant to achieve drying. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural schematic diagram of the present utility model;

[0015] Figure 2 This is a three-dimensional schematic diagram of the internal structure of the dryer for pentafluoroethane production according to this utility model;

[0016] Figure 3 This is a schematic diagram of the installation structure of the filter discharge pipe and connecting pipe of this utility model.

[0017] The components are as follows: 1. Support; 2. Drying cylinder; 3. Filter cylinder; 4. Isolation chamber; 5. Filter discharge pipe; 6. Desiccant tray; 7. Desiccant feed pipe; 8. Connecting pipe; 9. Gas distribution plate; 10. Pentafluoroethane feed pipe; 11. Rotating shaft; 12. Connecting rod; 13. First bevel gear; 14. Gearbox; 15. Second bevel gear; 16. Motor; 17. Turbine blades; 18. Wire mesh demister; 19. Desiccant discharge pipe. Detailed Implementation

[0018] To deepen the understanding of this utility model, the following detailed description will be provided in conjunction with embodiments. These embodiments are only used to explain this utility model and do not constitute a limitation on the scope of protection of this utility model.

[0019] according to Figure 1-3 As shown in the figure, this embodiment proposes a dryer for pentafluoroethane production, including a support 1, a drying cylinder 2, and a filter cylinder 3. The drying cylinder 2 is located at the top of the support 1, and the filter cylinder 3 is located inside the support 1. An isolation chamber 4 is located at the bottom of the drying cylinder 2, and a filter discharge pipe 5 is located inside the isolation chamber 4. The lower end of the filter discharge pipe 5 is connected to the inside of the filter cylinder 3. A desiccant disc 6 is rotatably located inside the drying cylinder 2 above the isolation chamber 4. A desiccant inlet pipe 7 is located on the outer wall of the drying cylinder 2 above the desiccant disc 6. A connecting pipe 8 is located at the bottom of the desiccant disc 6, and the lower end of the connecting pipe 8 is connected to the upper end of the filter discharge pipe 5 through a sealed bearing. A gas distribution plate 9 is located at the top of the drying cylinder 2, and a pentafluoroethane inlet pipe 10 is located on the outer wall of the drying cylinder 2 above the gas distribution plate 9. A rotating shaft 11 is rotatably located inside the drying cylinder 2, and a connecting rod 12 is located at the lower end of the rotating shaft 11. The two ends of the connecting rod 12 are connected to the top of the inside of the desiccant disc 6.

[0020] In use, the dryer for pentafluoroethane production of this invention first discharges the desiccant (a sodium hydroxide solution with a mass concentration of 3-5 mol / L) into the desiccant tray 6 through the desiccant inlet pipe 7. Then, the crude pentafluoroethane is discharged into the drying cylinder 2 through the pentafluoroethane inlet pipe 10. Next, the rotating shaft 11 is controlled to start rotating at a low speed, thereby driving the desiccant tray 6 to rotate synchronously. During the rotation of the desiccant tray 6, the pentafluoroethane in the drying cylinder 2 is disturbed, ensuring sufficient contact with the sodium hydroxide solution for drying. After drying, the desiccant (sodium hydroxide solution) is discharged into the filter cylinder through the filter discharge pipe. During this process, when gas containing droplets passes through the wire mesh demister, the droplets are intercepted and aggregated into larger droplets, which then drip off under gravity, thus achieving gas-liquid separation.

[0021] The upper end of the rotating shaft 11 extends to the top and is equipped with a first bevel gear 13. A reduction gearbox 14 is located at the top of the drying cylinder 2. A second bevel gear 15 is located at the output end of the reduction gearbox 14, meshing with the first bevel gear 13. A motor 16 is located at the top of the reduction gearbox 14, and its output end is connected to the input end of the reduction gearbox 14. Starting the motor 16 causes the second bevel gear 15 at the output end of the reduction gearbox 14 to engage with the first bevel gear 13, thus rotating the rotating shaft 11.

[0022] The outer wall of the rotating shaft 11 is provided with baffles 17, and multiple sets of baffles 17 are arranged in pairs. The baffles 17 of this invention can accelerate the flow of pentafluoroethane in the drying cylinder 2, thereby achieving full contact with the desiccant (sodium hydroxide solution) and achieving efficient drying.

[0023] A wire mesh demister 18 is provided inside the upper part of the filter cylinder 3, and the wire mesh demister 18 is detachably installed inside the filter cylinder 3.

[0024] The lower end of the filter cylinder 3 has a bucket-shaped structure, and the bottom of the filter cylinder 3 is provided with a desiccant discharge pipe 19.

[0025] The desiccant inlet pipe 7 is equipped with a first valve, the pentafluoroethane inlet pipe 10 is equipped with a second valve, the filter discharge pipe 5 is equipped with a third valve, and the desiccant discharge pipe 19 is equipped with a fourth valve.

[0026] This invention connects the desiccant disc 6, which is rotatably disposed inside the drying cylinder 2, to the lower end of the rotating shaft 11, which is also rotatably disposed inside the drying cylinder 2. This allows the rotating shaft 11 to drive the drying cylinder 2 to rotate. During the rotation of the desiccant disc 6, the pentafluoroethane in the drying cylinder 2 will be disturbed, and the desiccant will also shake to a certain extent during the rotation of the desiccant disc 6, so that the pentafluoroethane can fully contact the desiccant for drying, thereby improving the drying efficiency. This invention further disturbs the pentafluoroethane by setting two pairs of turbulence blades 17 on the outer wall of the rotating shaft 11, so that the pentafluoroethane can fully contact the desiccant for drying.

[0027] 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 illustrative of the principles of this 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 dryer for pentafluoroethane production, characterized in that: The device includes a support (1), a drying cylinder (2), and a filter cylinder (3). The drying cylinder (2) is located on the top of the support (1), and the filter cylinder (3) is located inside the support (1). An isolation chamber (4) is located below the inside of the drying cylinder (2). A filter discharge pipe (5) is located inside the isolation chamber (4), and the lower end of the filter discharge pipe (5) is connected to the inside of the filter cylinder (3). A desiccant disc (6) is rotatably installed inside the drying cylinder (2) above the isolation chamber (4), and a desiccant is placed on the outer wall of the drying cylinder (2) above the desiccant disc (6). The feed pipe (7) is provided with a connecting pipe (8) at the bottom of the desiccant tray (6). The lower end of the connecting pipe (8) is connected to the upper end of the filter discharge pipe (5) through a sealed bearing. A gas distribution plate (9) is provided above the inside of the drying cylinder (2). A pentafluoroethane feed pipe (10) is provided on the outer wall of the drying cylinder (2) above the gas distribution plate (9). A rotating shaft (11) is provided inside the drying cylinder (2). A connecting rod (12) is provided at the lower end of the rotating shaft (11). Both ends of the connecting rod (12) are connected to the upper inside of the desiccant tray (6).

2. The dryer for pentafluoroethane production according to claim 1, characterized in that: The upper end of the rotating shaft (11) extends to the top and is provided with a first bevel gear (13). The top of the drying cylinder (2) is provided with a reduction gearbox (14). The output end of the reduction gearbox (14) is provided with a second bevel gear (15). The second bevel gear (15) meshes with the first bevel gear (13). The top of the reduction gearbox (14) is provided with a motor. The output end of the motor (16) is connected to the input end of the reduction gearbox (14).

3. A dryer for pentafluoroethane production according to claim 1, characterized in that: The outer wall of the rotating shaft (11) is provided with turbulence blades (17), and multiple sets of turbulence blades (17) are provided in pairs.

4. A dryer for pentafluoroethane production according to claim 1, characterized in that: The filter cylinder (3) is equipped with a wire mesh demister (18) at the top inside, and the wire mesh demister (18) is detachably installed inside the filter cylinder (3).

5. A dryer for pentafluoroethane production according to claim 1, characterized in that: The lower end of the filter cylinder (3) has a bucket-shaped structure, and the bottom of the filter cylinder (3) is provided with a desiccant discharge pipe (19).

6. A dryer for pentafluoroethane production according to claim 5, characterized in that: The desiccant inlet pipe (7) is equipped with a first valve, the pentafluoroethane inlet pipe (10) is equipped with a second valve, the filter discharge pipe (5) is equipped with a third valve, and the desiccant discharge pipe (19) is equipped with a fourth valve.

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