Anode gas dust removal device for electrolytic fluorine production

Abstract

The invention provides an anode gas dust removal device for electrolytic fluorine production. The anode gas dust removal device is characterized in that a sedimentation pipe is connected with an electrolytic bath anode gas discharge pipe through a first pipeline; the electrostatic box is communicated with the settling pipe through a second pipeline; the corona wires are arranged in the electrostatic box, correspond to the air outlet end of the second pipeline and are electrically connected with the negative electrode of the power supply; the adsorption plate is arranged in the electrostatic box and is electrically connected with the positive electrode of the power supply; the dust removal box communicates with the electrostatic box through a third pipeline, a flow guide channel is formed in the dust removal box, and the air inlet end of the flow guide channel communicates with the air outlet end of the third pipeline; the Raschig ring filler is filled in the flow guide channel; the air inlet end of the fourth pipeline is communicated with the air outlet end of the flow guide channel. According to the scheme, multi-stage purification of dust with different particle sizes can be achieved through gravity settling, electrostatic dust removal and collision dust removal, the dust removal effect is good, efficiency is high, fluorine pipeline blockage is avoided, and the overhaul frequency of the whole equipment is reduced.

Description

Technical Field

[0001] This invention relates to the field of fluorine gas dust removal technology, and in particular to a dust removal device for anode gas in electrolytic fluorine production. Background Technology

[0002] Fluorine, the gaseous element of fluorine, is chemically highly reactive and possesses strong oxidizing properties. It serves as a fluorinating agent in inorganic, organic, and semiconductor materials, and is widely used in electronics, laser technology, pharmaceuticals, plastics, petrochemicals, aerospace, and other fields, making it an important raw material in the chemical industry. Existing dust removal systems for fluorine production use a combination of Raschig ring dust collectors and settling pipes to filter and collect dust entrained in the fluorine gas. However, the effect is unsatisfactory. Dust accumulates at the inlet valve of the main fluorine gas pipe and in the dust collector, causing blockages in the fluorine gas pipeline, leading to excessively high anode pressure in the electrolytic cell and frequent maintenance. Summary of the Invention

[0003] This invention provides a dust removal device for anode gas in electrolytic fluorine production. Through gravity settling, electrostatic dust removal and collision dust removal, it can achieve multi-stage purification of dust with different particle sizes, with good dust removal effect and high efficiency, avoiding blockage of fluorine gas pipelines and reducing the maintenance frequency of the overall equipment.

[0004] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows: An electrolytic fluorine production anode gas dust removal device, comprising: A settling pipe, wherein the settling pipe is connected to the anode gas discharge pipe of the electrolytic cell via a first pipe; An electrostatic box, wherein the electrostatic box is connected to the settling pipe via a second pipe, the second pipe being higher than the first pipe; Multiple corona wires are installed inside the electrostatic box, and the multiple corona wires correspond to the outlet end of the second pipe. The multiple corona wires are electrically connected to the negative terminal of the power supply. An adsorption plate is disposed inside the electrostatic box. The adsorption plate corresponds to multiple corona wires and is electrically connected to the positive terminal of the power supply. A dust collector is provided, which is connected to the electrostatic box via a third pipe. The air inlet of the third pipe is located at the top of the electrostatic box. A flow guide channel is provided inside the dust collector, and the air inlet of the flow guide channel is connected to the air outlet of the third pipe. Raschig ring packing, wherein the Raschig ring packing is filled in the flow channel; The fourth pipe has an inlet end connected to the outlet end of the guide channel, and the outlet end of the fourth pipe is connected to a fluorine storage device via a vacuum pump.

[0005] Optionally, the electrolytic fluorine production anode gas dust removal device further includes: A sound wave generator, wherein the emitting end of the sound wave generator corresponds to the adsorption plate.

[0006] Optionally, the adsorption plate is tilted, with its upper end close to multiple corona lines, and the tilt angle of the adsorption plate is 7° to 15°.

[0007] Optionally, the electrolytic fluorine production anode gas dust removal device further includes: Multiple fixing posts are connected to the inner wall of the electrostatic box, and the multiple fixing posts are slidably engaged with multiple guide holes at the bottom of the adsorption plate. Multiple fixing plates, each of which is connected to the end of a set of fixing columns; Multiple first springs are fitted onto the outside of multiple fixed posts, and the multiple first springs are located between the fixed plate and the adsorption plate; Multiple second springs are fitted onto the outside of multiple fixed columns, and the multiple second springs are located between the inner wall of the electrostatic box and the adsorption plate.

[0008] Optionally, the electrolytic fluorine production anode gas dust removal device further includes: Multiple studs are arranged inside the electrostatic box and distributed around the outlet end of the second pipe. A first insulating frame, wherein a plurality of first through holes are provided through the first insulating frame, and a plurality of bolts are respectively inserted through the plurality of first through holes; The second insulating frame has multiple second through holes, and multiple bolts pass through the multiple second through holes respectively; The first insulating frame and the second insulating frame have a first receiving cavity and a second receiving cavity respectively on their adjacent surfaces; A conductive frame is located inside the cavity structure formed by the first and second accommodating cavities. Multiple corona wires are arranged in parallel inside the conductive frame. A grounding post is formed on the outside of the conductive frame, and the grounding post is electrically connected to the positive terminal of the power supply. Multiple nuts are threaded to the ends of multiple bolts, and the multiple nuts are in close contact with the second insulating frame to clamp and fix the conductive frame inside the cavity structure.

[0009] Optionally, the inner diameter of the upper part of the settling pipe gradually decreases.

[0010] Optionally, the electrolytic fluorine production anode gas dust removal device further includes: The first dust collection hopper is located on the bottom surface of the settling pipe; The first dust discharge pipe is formed at the bottom end of the first dust collection hopper; A sealing cap is threadedly connected to the end of the first dust discharge pipe.

[0011] Optionally, the electrolytic fluorine production anode gas dust removal device further includes: The second dust collection hopper is located at the bottom of the electrostatic box, and the adsorption plate is located above the second dust collection hopper; The second dust pipe is formed at the bottom of the second dust collection hopper; A discharge valve is connected to the end of the second dust discharge pipe.

[0012] Optionally, the electrolytic fluorine production anode gas dust removal device further includes: The dust collector is equipped with a partition and a mesh plate. The mesh plate is horizontally distributed, and its outer side abuts against the inner wall of the dust collector. The partition is vertically distributed, with its two sides abutting against the inner wall of the dust collector and its bottom surface abutting against the upper surface of the mesh plate, so as to divide the inner cavity of the dust collector into a first cavity, a third cavity, and a second cavity. The first cavity is connected to the outlet end of the third pipe, the first cavity is connected to the third cavity, the third cavity is connected to the second cavity, the second cavity is connected to the inlet end of the fourth pipe, the Raschig ring packing is filled in the first cavity and the second cavity, and the first cavity, the third cavity and the second cavity form the flow guiding channel.

[0013] Optionally, the dust collector box has an opening structure at the bottom, which is connected to the third cavity, and a sealing flange is provided at the bottom of the opening structure.

[0014] The above-described solution of the present invention has at least the following beneficial effects: The above-mentioned solution of the present invention can achieve multi-stage purification of dust with different particle sizes through gravity settling, electrostatic dust removal and collision dust removal. It has good dust removal effect, high efficiency, avoids blockage of fluorine pipelines and reduces the maintenance frequency of the overall equipment. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the electrolytic fluorine production anode gas dust removal device provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the installation structure of the corona wire in the electrolytic fluorine production anode gas dust removal device provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the support frame in the electrolytic fluorine production anode gas dust removal device provided in an embodiment of the present invention; Figure 4This is a schematic diagram of the installation structure of the adsorption plate in the electrolytic fluorine production anode gas dust removal device provided in an embodiment of the present invention.

[0016] Explanation of reference numerals in the attached figures: 1. Settling pipe; 11. First pipe; 12. First dust collection hopper; 13. First dust discharge pipe; 14. Sealing cover; 2. Static electricity box; 21. Second pipe; 22. Second dust collection hopper; 23. Second dust discharge pipe; 24. Discharge valve; 3. Corona wire; 31. Stud; 32. Nut; 33. First insulating frame; 331. First through hole; 332. First receiving cavity; 34. Second insulating frame; 341. Second through hole; 342. 1. Second receiving cavity; 35. Conductive frame; 36. Electrical connection post; 4. Adsorption plate; 41. Guide hole; 42. Fixing plate; 43. Fixing post; 44. First spring; 45. Second spring; 5. Sound wave generator; 6. Dust collection box; 61. Third pipe; 62. Fourth pipe; 63. First cavity; 64. Second cavity; 65. Third cavity; 66. Sealing flange; 7. Raschig ring packing; 8. Mesh plate; 9. Partition plate. Detailed Implementation

[0017] Exemplary embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0018] like Figures 1 to 4 As shown, an embodiment of the present invention provides a dust removal device for anode gas in electrolytic fluorine production, comprising: Settling pipe 1 is connected to the anode gas discharge pipe of the electrolytic cell via the first pipe 11; Electrostatic box 2 is connected to sedimentation pipe 1 through second pipe 21, and second pipe 21 is higher than first pipe 11. Multiple corona wires 3 are installed inside the electrostatic box 2, and the multiple corona wires 3 correspond to the outlet end of the second pipe 21. The multiple corona wires 3 are electrically connected to the negative terminal of the power supply. Adsorption plate 4 is set inside electrostatic box 2. Adsorption plate 4 corresponds to multiple corona wires 3. Adsorption plate 4 is electrically connected to the positive terminal of power supply. Dust collector 6 is connected to electrostatic box 2 via a third pipe 61. The air inlet of the third pipe 61 is located at the top of electrostatic box 2. A flow guide channel is provided inside the dust collector 6. The air inlet of the flow guide channel is connected to the air outlet of the third pipe 61. Raschig ring packing 7, Raschig ring packing 7 fills the flow channel; The fourth pipe 62 has its inlet end connected to the outlet end of the guide channel, and its outlet end is connected to the fluorine storage device via a vacuum pump.

[0019] In this embodiment, under the action of the vacuum pump, a negative pressure is formed in the dust removal box 6, the electrostatic box 2 and the settling pipe 1. Under the action of the negative pressure, the fluorine gas discharged from the anode gas discharge pipe of the electrolytic cell passes through the first pipe 11, the settling pipe 1, the second pipe 21, the electrostatic box 2, the third pipe 61, the dust removal box 6 and the fourth pipe 62 in sequence, and finally enters the fluorine gas storage device. Fluorine gas enters the settling tube 1 through the first pipe 11. Under the action of gravity, the large dust particles with large weight settle to the bottom of the settling tube 1, thereby achieving the separation of large particles with large weight from the fluorine gas. Fluorine gas enters the electrostatic box 2 through the second pipe 21. Through the collision and diffusion of ions with multiple corona wires 3, the dust and pollutants carried by the fluorine gas become negatively charged. An uneven high-voltage electrostatic field is formed between the multiple power lines and the adsorption plate 4. Under the action of the electric field force, the entire adsorption plate 4 forms a corona zone. The negatively charged dust and pollutants enter the corona zone. Under the action of the electric field force, the negatively charged dust and pollutants quickly reach the adsorption plate 4 and release their charge at the same time. The adsorption plate 4 adsorbs the dust and pollutants, thereby achieving the separation of smaller particle size dust and pollutants in the fluorine gas. Fluorine gas enters the guide channel inside the dust collector 6 through the third pipe 61. The dust in the fluorine gas collides with the Raschig ring packing 7 in the guide channel. The Raschig ring packing 7 captures the dust in the fluorine gas, thus achieving the final separation of the dust. Multi-stage purification of dust with different particle sizes can be achieved through gravity settling, electrostatic dust removal, and impact dust removal. This method has good dust removal effect, high efficiency, avoids blockage of fluoride pipelines, and reduces the overall maintenance frequency of the equipment.

[0020] In this embodiment, the adsorption plate 4 is made of Monel 400 alloy to enhance its resistance to hydrogen fluoride corrosion. The first pipe 11, the settling pipe 1, the second pipe 21, the electrostatic box 2, the third pipe 61, the dust removal box 6, and the fourth pipe 62 are all lined with polytetrafluoroethylene to improve the overall resistance to hydrogen fluoride corrosion of the equipment, ensure the overall sealing of the equipment, and extend the overall service life of the equipment.

[0021] In this embodiment, a first valve is installed on the first pipe 11, and a gas injection pipe is connected to the first pipe 11. The gas injection pipe is connected to a nitrogen supply device, and a second valve is installed on the gas injection pipe. A third valve is installed on the fourth pipe 62, and an exhaust pipe is connected to the fourth pipe 62. An exhaust valve and a pressure gauge are installed on the exhaust pipe. Before performing fluorine dust removal, the first valve, the third valve, and the exhaust valve are closed, and the second valve is opened. Nitrogen is injected into the electrolytic fluorine anode gas dust removal device through the gas injection pipe. The pressure inside the electrolytic fluorine anode gas dust removal device is observed through the pressure gauge to determine whether there is a leak in the electrolytic fluorine anode gas dust removal device. After the leak test is completed, the exhaust valve is opened to vent the nitrogen in the electrolytic fluorine anode gas dust removal device. The second valve and the pressure relief valve are closed, and the first valve and the third valve are opened to perform fluorine dust removal.

[0022] In this embodiment, the power supply is located on the outside of the electrostatic box 2. A wire hole is provided through the outside of the electrostatic box 2. The power supply part extends into the interior of the electrostatic box 2 through the wire hole. The power supply and the wire hole are sealed. The negative and positive terminals of the power supply are electrically connected to multiple corona wires 3 and adsorption plates 4 through wires, respectively. The wires are distributed along the inner wall of the electrostatic box 2.

[0023] like Figure 1 As shown, in an optional embodiment of the present invention, the electrolytic fluorine production anode gas dust removal device further includes: Sound wave generator 5, the emitting end of sound wave generator 5 corresponds to adsorption plate 4.

[0024] In this embodiment, a sound wave generator 5 is set up to generate sound waves. The sound waves act on the adsorption plate 4, causing the adsorption plate 4 to resonate, thereby causing the dust adsorbed on the adsorption plate 4 to detach from the adsorption plate 4, achieving resonant cleaning of the adsorption plate 4, and ensuring the adsorption effect of the adsorption plate 4 on the dust. In specific applications, the opening interval of the sound wave generator 5 can be 24 hours, and the duration of each opening of the sound wave generator 5 can be 10 minutes.

[0025] like Figure 1 As shown, in an optional embodiment of the present invention, the adsorption plate 4 is inclined, with the upper end of the adsorption plate 4 close to the multiple corona lines 3, and the inclination angle of the adsorption plate 4 is 7° to 15°.

[0026] In this embodiment, by tilting the adsorption plate 4 at an angle of 7° to 15°, the dust removal effect on the adsorption plate 4 can be improved when the adsorption plate 4 resonates; in specific applications, the tilting angle of the adsorption plate 4 is preferably 10°.

[0027] like Figure 4 As shown, in an optional embodiment of the present invention, the electrolytic fluorine production anode gas dust removal device further includes: Multiple fixing posts 43 are connected to the inner wall of the electrostatic box 2, and the multiple fixing posts 43 are respectively slidably engaged with multiple guide holes 41 at the bottom of the adsorption plate 4. Multiple fixing plates 42 are connected to the ends of multiple fixing columns 43 respectively; Multiple first springs 44 are fitted on the outside of multiple fixing posts 43, and the multiple first springs 44 are located between the fixing plate 42 and the adsorption plate 4. Multiple second springs 45 are fitted on the outside of multiple fixed posts 43, and the multiple second springs 45 are located between the inner wall of the electrostatic box 2 and the adsorption plate 4.

[0028] In this embodiment, when the sound waves emitted by the sound wave generator 5 cause the adsorption plate 4 to resonate, the resonance effect of the adsorption plate 4 can be improved by multiple first springs 44, multiple second springs 45 and multiple fixed columns 43, thereby improving the dust removal effect on the adsorption plate 4.

[0029] like Figure 2 and Figure 3 As shown, in an optional embodiment of the present invention, the electrolytic fluorine production anode gas dust removal device further includes: Multiple studs 31 are installed inside the electrostatic box 2 and distributed around the air outlet of the second pipe 21. The first insulating frame 33 has multiple first through holes 331 through it, and multiple bolts pass through the multiple first through holes 331 respectively. The second insulating frame 34 has multiple second through holes 341 through it, and multiple bolts pass through the multiple second through holes 341 respectively. The surfaces of the first insulating frame 33 and the second insulating frame 34 that are close to each other are respectively provided with a first receiving cavity 332 and a second receiving cavity 342; The conductive frame 35 is located inside the cavity structure formed by the first receiving cavity 332 and the second receiving cavity 342. Multiple corona wires 3 are arranged in parallel inside the conductive frame 35. A terminal post 36 is formed on the outside of the conductive frame 35. The terminal post 36 is electrically connected to the positive terminal of the power supply. Multiple nuts 32 are threaded to the ends of multiple bolts, and the multiple nuts 32 are in close contact with the second insulating frame 34 to clamp and fix the conductive frame 35 inside the cavity structure.

[0030] In this embodiment, multiple power lines are electrically connected to the positive terminal of the power supply through the terminal post 36 and the conductive frame 35; multiple studs 31 and multiple nuts 32 are used to clamp the first insulating frame 33 and the second insulating frame 34, thereby clamping and fixing the conductive frame 35 inside the cavity structure formed by the first receiving cavity 332 and the second receiving cavity 342, ensuring the stability of the conductive frame 35 and the multiple corona wires 3; the multiple corona wires 3 are arranged in parallel inside the conductive frame 35 to ensure the passage effect of fluorine gas, ensuring that the dust and pollutants in the fluorine gas can be accurately charged with negative charges, and ensuring the adsorption effect of the adsorption plate 4 on dust and pollutants.

[0031] like Figure 1 As shown, in an optional embodiment of the present invention, the inner diameter of the upper part of the settling pipe 1 gradually decreases.

[0032] In this embodiment, by gradually reducing the inner diameter of the upper part of the settling tube 1, the inner cavity of the upper part of the settling tube 1 can be reduced. During the ascent of the fluorine gas, the probability of collision between the dust carried by the fluorine gas is increased due to the gradual reduction of the inner cavity of the upper part of the settling tube 1. Since the dust carried by the fluorine gas has a certain stickiness, the weight increases after the dust collides and combines, and thus settles to the bottom of the settling tube 1 under the action of gravity, further improving the gravity settling effect of the dust.

[0033] like Figure 1 As shown, in an optional embodiment of the present invention, the electrolytic fluorine production anode gas dust removal device further includes: The first dust hopper 12 is located on the bottom surface of the settling pipe 1; The first dust pipe 13 is formed at the bottom of the first dust collection hopper 12; The sealing cover 14 is threadedly connected to the end of the first dust discharge pipe 13.

[0034] In this embodiment, the first dust discharge pipe 13 is sealed by the sealing cover 14. When the sealing cover 14 is opened, the dust settled in the settling pipe 1 can be discharged through the first dust collection hopper 12 and the first dust discharge pipe 13, which facilitates the cleaning of the settling pipe 1.

[0035] like Figure 1 As shown, in an optional embodiment of the present invention, the electrolytic fluorine production anode gas dust removal device further includes: The second dust collection hopper 22 is located at the bottom of the electrostatic box 2, and the adsorption plate 4 is located above the second dust collection hopper 22. The second dust pipe 23 is formed at the bottom of the second dust collection hopper 22; Discharge valve 24 is connected to the end of the second dust discharge pipe 23.

[0036] In this embodiment, the second dust discharge pipe 23 can be sealed by the discharge valve 24. When the discharge valve 24 is opened, the dust inside the electrostatic box 2 can be discharged through the first dust collection hopper 12, the second dust discharge pipe 23 and the discharge valve 24, which facilitates the cleaning of the electrostatic box 2. In specific applications, the discharge valve 24 can be a manual valve, an automatic valve or a combination of a manual valve and an automatic valve.

[0037] like Figure 1 As shown, in an optional embodiment of the present invention, the electrolytic fluorine production anode gas dust removal device further includes: The dust collector 6 is provided with a partition 9 and a mesh plate 8. The mesh plate 8 is horizontally distributed and its outer side abuts against the inner wall of the dust collector 6. The partition 9 is vertically distributed and its two sides abut against the inner wall of the dust collector 6. The bottom surface of the partition 9 abuts against the upper surface of the mesh plate 8, so as to divide the inner cavity of the dust collector 6 into a first cavity 63, a third cavity 65 and a second cavity 64. The first cavity 63 is connected to the outlet end of the third pipe 61, the first cavity 63 is connected to the third cavity 65, the third cavity 65 is connected to the second cavity 64, the second cavity 64 is connected to the inlet end of the fourth pipe 62, and Raschig ring packing 7 is filled in the first cavity 63 and the second cavity 64. The first cavity 63, the third cavity 65 and the second cavity 64 form a flow guiding channel.

[0038] In this embodiment, fluorine gas enters the first chamber 63 through the second pipe 21. The dust in the fluorine gas collides with the Raschig ring packing 7 in the first chamber 63, completing the first separation of dust in the fluorine gas. The fluorine gas then passes through the mesh plate 8 and enters the third chamber 65 and the second chamber 64 in sequence. The dust in the fluorine gas collides with the Raschig ring packing 7 in the second chamber 64, completing the second separation of dust in the fluorine gas. By setting the first chamber 63 and the second chamber 64, the dust in the fluorine gas can collide with the Raschig ring packing 7 twice, further improving the separation effect of dust in the fluorine gas.

[0039] like Figure 1 As shown, in an optional embodiment of the present invention, the dust collection box 6 is provided with an opening structure at the bottom, the opening structure is connected to the third cavity 65, and a sealing flange 66 is provided at the bottom of the opening structure.

[0040] In this embodiment, the sealing of the opening structure is achieved by the sealing flange 66. Opening the sealing flange 66 allows for easy cleaning of the dust inside the dust collection box 6 through the opening structure.

[0041] like Figure 1 As shown, in an optional embodiment of the present invention, the outer side of the electrostatic box 2 is provided with multiple inspection ports; the multiple inspection ports correspond to the adsorption plate 4, the third pipe 61 and the sound wave generator 5, respectively.

[0042] In this embodiment, multiple inspection ports are provided to facilitate the inspection of the status of the adsorption plate 4, the third pipe 61, and the sound wave generator 5, ensuring the normal operation of electrostatic dust removal.

[0043] In this embodiment, the electrostatic box 2 adopts a multi-segment structure, and the multi-segment structure is sealed and connected by a flange structure, which ensures the sealing of the electrostatic box 2 and facilitates the disassembly of the electrostatic box 2, thereby facilitating the maintenance and repair of the internal components of the electrostatic box 2.

[0044] Electrolytic fluorine production anode gas dust removal process: S1. Leak test of the electrolytic fluorine production anode gas dust removal device: Close the first valve, the third valve, and the exhaust valve; open the second valve; inject nitrogen into the electrolytic fluorine production anode gas dust removal device through the injection pipe; observe the pressure inside the electrolytic fluorine production anode gas dust removal device using a pressure gauge to determine if there is a gas leak; after completing the leak test, open the exhaust valve to purge the nitrogen from the electrolytic fluorine production anode gas dust removal device; close the second valve and the pressure relief valve; open the first valve and the third valve to perform fluorine gas dust removal; S2. Gravity settling dust removal: Fluorine gas enters the settling tube 1 through the first pipe 11. Under the action of gravity, the large dust particles with large weight settle to the bottom of the settling tube 1, realizing the separation of large particles with large weight from the fluorine gas. S3. Electrostatic dust removal: Fluorine gas enters the electrostatic box 2 through the second pipe 21. Through the collision and diffusion of ions with multiple corona wires 3, the dust and pollutants carried by the fluorine gas become negatively charged. An uneven high-voltage electrostatic field is formed between the multiple power lines and the adsorption plate 4. Under the action of the electric field force, the entire adsorption plate 4 forms a corona zone. The negatively charged dust and pollutants enter the corona zone. Under the action of the electric field force, the negatively charged dust and pollutants quickly reach the adsorption plate 4 and release their charge at the same time. The adsorption plate 4 adsorbs the dust and pollutants, realizing the separation of smaller particle size dust and pollutants in the fluorine gas. S4. Collision Dust Removal: Fluorine gas enters the first chamber 63 through the second pipe 21. The dust in the fluorine gas collides with the Raschig ring packing 7 in the first chamber 63, completing the first separation of dust in the fluorine gas. The fluorine gas passes through the mesh plate 8 and enters the third chamber 65 and the second chamber 64 in sequence. The dust in the fluorine gas collides with the Raschig ring packing 7 in the second chamber 64, completing the second separation of dust in the fluorine gas. By setting the first chamber 63 and the second chamber 64, the dust in the fluorine gas can collide with the Raschig ring packing 7 twice, further improving the separation effect of dust in the fluorine gas. S5. Resonance Cleaning Adsorption Plate 4: Every 24 hours, turn on the sound wave generator 5 to generate sound waves. The sound waves act on the adsorption plate 4, causing the adsorption plate 4 to resonate, so that the dust adsorbed on the adsorption plate 4 is detached from the adsorption plate 4, thus achieving resonance cleaning of the adsorption plate 4. S6. Dust removal from the electrolytic fluorine anode gas dust removal device: Close the first and third valves, open the second valve and the pressure relief valve, and inject nitrogen into the electrolytic fluorine anode gas dust removal device through the gas injection pipe to completely replace the fluorine gas in the device; close the second valve and the pressure relief valve, open the sealing cover 14, and discharge the dust settled in the settling pipe 1 through the first dust collection hopper 12 and the first dust discharge pipe 13 to clean the settling pipe 1; open the discharge valve 24, and discharge the dust inside the electrostatic box 2 through the first dust collection hopper 12, the second dust discharge pipe 23 and the discharge valve 24 to clean the electrostatic box 2; open the sealing flange 66 to clean the dust inside the dust removal box 6 through the opening structure.

[0045] The electrolytic fluorine production anode gas dust removal device provided in the above embodiments of the present invention can achieve multi-stage purification of dust with different particle sizes through gravity settling, electrostatic dust removal and collision dust removal. It has good dust removal effect, high efficiency, avoids fluorine gas pipeline blockage and reduces the maintenance frequency of the overall equipment.

[0046] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A dust removal device for anode gas in electrolytic fluorine production, characterized in that, include: Settling pipe (1), the settling pipe (1) is connected to the anode gas discharge pipe of the electrolytic cell through the first pipe (11); An electrostatic box (2) is connected to the settling pipe (1) through a second pipe (21), and the second pipe (21) is higher than the first pipe (11). Multiple corona wires (3) are installed inside the electrostatic box (2), and the multiple corona wires (3) correspond to the outlet end of the second pipe (21). The multiple corona wires (3) are electrically connected to the negative terminal of the power supply. Adsorption plate (4), the adsorption plate (4) is disposed inside the electrostatic box (2), the adsorption plate (4) corresponds to multiple corona lines (3), and the adsorption plate (4) is electrically connected to the positive terminal of the power supply. A dust collector (6) is connected to the electrostatic box (2) via a third pipe (61). The air inlet of the third pipe (61) is located at the top of the electrostatic box (2). A flow guide channel is provided inside the dust collector (6). The air inlet of the flow guide channel is connected to the air outlet of the third pipe (61). Raschig ring packing (7), wherein the Raschig ring packing (7) is filled in the flow channel; The fourth pipe (62) has an inlet end connected to the outlet end of the guide channel, and the outlet end of the fourth pipe (62) is connected to the fluorine storage device via a vacuum pump.

2. The electrolytic fluorine production anode gas dust removal device according to claim 1, characterized in that, Also includes: A sound wave generator (5) is provided, the emitting end of which corresponds to the adsorption plate (4).

3. The electrolytic fluorine production anode gas dust removal device according to claim 2, characterized in that, The adsorption plate (4) is inclined, and the upper end of the adsorption plate (4) is close to multiple corona lines (3). The inclination angle of the adsorption plate (4) is 7° to 15°.

4. The electrolytic fluorine production anode gas dust removal device according to claim 3, characterized in that, Also includes: Multiple fixed columns (43) are connected to the inner wall of the electrostatic box (2), and the multiple fixed columns (43) are respectively slidably engaged with multiple guide holes (41) at the bottom of the adsorption plate (4); Multiple fixing plates (42) are connected to the ends of multiple fixing columns (43) respectively; Multiple first springs (44) are fitted on the outside of multiple fixed posts (43), and multiple first springs (44) are located between the fixed plate (42) and the adsorption plate (4); Multiple second springs (45) are fitted on the outside of multiple fixed posts (43) and are located between the inner wall of the electrostatic box (2) and the adsorption plate (4).

5. The electrolytic fluorine production anode gas dust removal device according to claim 1, characterized in that, Also includes: Multiple studs (31) are arranged inside the electrostatic box (2) and distributed around the air outlet of the second pipe (21); The first insulating frame (33) has multiple first through holes (331) through it, and multiple bolts pass through the multiple first through holes (331) respectively. The second insulating frame (34) has multiple second through holes (341) through it, and multiple bolts pass through the multiple second through holes (341) respectively. The first insulating frame (33) and the second insulating frame (34) are respectively provided with a first receiving cavity (332) and a second receiving cavity (342) on their adjacent surfaces; A conductive frame (35) is located inside the cavity structure formed by the first receiving cavity (332) and the second receiving cavity (342). Multiple corona wires (3) are arranged in parallel inside the conductive frame (35). A grounding post (36) is formed on the outside of the conductive frame (35). The grounding post (36) is electrically connected to the positive terminal of the power supply. Multiple nuts (32) are threaded to the ends of multiple bolts, and the multiple nuts (32) are in close contact with the second insulating frame (34) to clamp and fix the conductive frame (35) inside the cavity structure.

6. The electrolytic fluorine production anode gas dust removal device according to claim 1, characterized in that, The inner diameter of the upper part of the settling pipe (1) gradually decreases.

7. The electrolytic fluorine production anode gas dust removal device according to claim 1, characterized in that, Also includes: The first dust collection hopper (12) is disposed on the bottom surface of the settling pipe (1); The first dust discharge pipe (13) is formed at the bottom end of the first dust collection hopper (12); A sealing cap (14) is threaded to the end of the first dust discharge pipe (13).

8. The electrolytic fluorine production anode gas dust removal device according to claim 2, characterized in that, Also includes: The second dust collection hopper (22) is located at the bottom of the electrostatic box (2), and the adsorption plate (4) is located above the second dust collection hopper (22); The second dust discharge pipe (23) is formed at the bottom end of the second dust collection hopper (22); Discharge valve (24) is connected to the end of the second dust discharge pipe (23).

9. The electrolytic fluorine production anode gas dust removal device according to claim 1, characterized in that, Also includes: The dust collector (6) is equipped with a partition (9) and a mesh plate (8). The mesh plate (8) is horizontally distributed and its outer side abuts against the inner wall of the dust collector (6). The partition (9) is vertically distributed and its two sides abut against the inner wall of the dust collector (6). The bottom surface of the partition (9) abuts against the upper surface of the mesh plate (8) to divide the inner cavity of the dust collector (6) into a first cavity (63), a third cavity (65), and a second cavity (64). The first cavity (63) is connected to the outlet end of the third pipe (61), the first cavity (63) is connected to the third cavity (65), the third cavity (65) is connected to the second cavity (64), the second cavity (64) is connected to the inlet end of the fourth pipe (62), the Raschig ring packing (7) is filled in the first cavity (63) and the second cavity (64), and the first cavity (63), the third cavity (65) and the second cavity (64) form the flow channel.

10. The electrolytic fluorine production anode gas dust removal device according to claim 9, characterized in that, The dust collector (6) has an opening structure at the bottom, which is connected to the third cavity (65). The opening structure has a sealing flange (66) at the bottom.

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