A fluorinated ethylene carbonate synthesis device

Abstract

The utility model discloses a kind of fluoroethylene carbonate synthetic devices, it is related to fluoroethylene carbonate production technical field, the utility model includes reaction kettle and kettle cover, kettle cover top side is connected with mounting bracket, and corrosion-proof fan is installed in mounting bracket inside upper portion, corrosion-proof fan suction end is connected with suction pipe, and the bottom of suction pipe is connected with shell, shell inside is placed with silk screen demister.The utility model is provided with corrosion-proof fan, suction pipe and back gas pipe, corrosion-proof fan can provide stable airflow power, under its action, suction pipe can form negative pressure adsorption to the fluorine gas that escapes upward in reaction kettle, realize the effective recovery of part of escaping fluorine gas;Fluorine gas after recovery is transported to the inside of reaction kettle again through back gas pipe, so that part of fluorine gas that can be discharged with tail gas reenters the reaction system of ethylene carbonate and fluorine gas, and then reduce fluorine gas escape amount;Reduce the waste of fluorine gas raw material, improve the actual utilization of fluorine gas.

Description

Technical Field

[0001] This utility model relates to the field of fluoroethylene carbonate production technology, specifically to a fluoroethylene carbonate synthesis apparatus. Background Technology

[0002] Fluorinated ethylene carbonate (FEC) is an important cyclic carbonate compound widely used in lithium-ion battery electrolytes. As an electrolyte additive, it can significantly improve the chemical stability of the electrolyte and enhance the cycle charge-discharge performance and safety of the battery. It is one of the key auxiliary raw materials in the current lithium battery material system.

[0003] Currently, the mainstream industrial processes for preparing fluoroethylene carbonate are mainly electrochemical fluorination, direct fluorination, and fluorine-halogen exchange. Direct fluorination uses ethylene carbonate and fluorine gas as the core raw materials, and the mixing reaction is completed in a reactor. The conventional process is to inject ethylene carbonate into the reactor through the liquid inlet of the reactor lid, introduce fluorine gas through the gas inlet pipe, and use a stirrer installed in the middle of the reactor lid to achieve uniform mixing of the two raw materials. At the same time, the reaction temperature is controlled by the jacket outside the reactor, and the fluoroethylene carbonate produced by the reaction is discharged from the liquid outlet at the bottom of the reactor.

[0004] Existing direct fluorination reactors used for the synthesis of fluoroethylene carbonate suffer from significant fluorine escape during the reaction process due to the reactivity and diffusion characteristics of fluorine. These reactors only provide basic functions such as raw material transport, stirring, temperature control, and product output, lacking a structure specifically designed for the recovery and reuse of escaped fluorine. This results in the direct emission of escaped fluorine along with the tail gas, wasting fluorine raw materials, increasing production energy consumption and costs, and requiring additional treatment of the fluorine-containing tail gas, further complicating the production process. Utility Model Content

[0005] Therefore, the purpose of this utility model is to provide a fluoroethylene carbonate synthesis apparatus to solve the technical problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a fluoroethylene carbonate synthesis apparatus, comprising a reaction vessel and a vessel cover, wherein a mounting frame is connected to one side of the top of the vessel cover, and an anti-corrosion fan is installed inside the mounting frame, wherein an air intake pipe is connected to the air inlet end of the anti-corrosion fan, and a housing is connected to the bottom of the air intake pipe, wherein a wire mesh demister is placed inside the housing, and a first grid plate and a second grid plate are respectively fixed at both ends of the housing; a return gas pipe is connected to one side of the bottom of the mounting frame, and a return gas hole is opened at the bottom of the return gas pipe.

[0007] By adopting the above technical solution, the mounting frame provides stable support for the corrosion-resistant fan and return gas pipe, the corrosion-resistant fan provides airflow power, the suction pipe can adsorb the fluorine gas escaping from the reactor, the shell, together with the wire mesh demister, the first grid plate and the second grid plate, can intercept the ethylene carbonate droplets carried in the fluorine gas, and the return gas pipe and return gas hole can send the recovered and purified fluorine gas back to the reaction area. The whole system forms a closed-loop structure of fluorine gas recovery, droplet interception and fluorine gas return, which effectively reduces fluorine gas escape and raw material waste.

[0008] Furthermore, the shell is located above the inside of the reactor, and the bottom of the return gas pipe is located below the inside of the reactor. The top of the return gas pipe is connected to the outlet of the anti-corrosion fan through a round hole in the mounting bracket.

[0009] By adopting the above technical solution, the shell is placed at the top of the reactor to accurately capture the upward-diffusing fluorine gas. The return gas pipe extends to the bottom of the reactor to directly send the recovered fluorine gas back to the ethylene carbonate raw material. The connection design between the return gas pipe and the corrosion-resistant fan creates an airflow channel for recovery and transportation, ensuring that the recovered fluorine gas can smoothly re-enter the reaction system and improve the utilization rate of fluorine gas.

[0010] Furthermore, the lower part of the interior of the shell is sloped.

[0011] By adopting the above technical solution, the slope structure can guide the ethylene carbonate droplets intercepted by the wire mesh demister, allowing the droplets to flow naturally along the slope to the first grid plate and then flow back into the reactor through the grid plate, avoiding the accumulation of droplets in the shell and causing waste, while reducing the risk of droplets entering the anti-corrosion fan and affecting the operation of the equipment.

[0012] Furthermore, the bottom of the return pipe is annular, and the inner diameter of the annulus is larger than the diameter of the stirrer.

[0013] By adopting the above technical solution, the annular structure can expand the coverage area of ​​the return gas pipe at the bottom of the reactor, and the design with an inner diameter larger than the diameter of the stirrer can avoid mechanical interference between the return gas pipe and the stirring in operation. This ensures that the stirrer can stir normally to promote the mixing of raw materials, and also ensures that the recovered fluorine gas can evenly cover the reaction area.

[0014] Furthermore, multiple air return holes are provided, and the multiple air return holes are distributed in a ring array.

[0015] By adopting the above technical solution, the multiple return vents of the annular array can allow the recovered fluorine gas to be discharged evenly from different directions, avoiding the local accumulation of fluorine gas in the reactor and causing uneven mixing. This allows the fluorine gas to fully contact the ethylene carbonate raw material, further increasing the probability of fluorine gas participating in the reaction and reducing the secondary escape of fluorine gas caused by insufficient mixing.

[0016] Furthermore, a jacket is installed on the outside of the reactor, and a liquid outlet is provided at the bottom of the reactor.

[0017] By adopting the above technical solution, the jacket can heat or cool the environment inside the reactor according to the temperature requirements of the fluoroethylene carbonate synthesis reaction, providing suitable temperature conditions for the reaction to ensure reaction efficiency and product quality; the outlet is used to smoothly discharge the generated fluoroethylene carbonate after the reaction is completed, completing the closed loop of a single production process.

[0018] Furthermore, the vessel lid is connected to the top of the reactor, and a stirrer is installed in the middle of the top of the vessel lid. The top of the vessel lid is connected to a liquid inlet and an air inlet pipe.

[0019] By adopting the above technical solutions, the vessel lid can form a seal on the reactor to prevent leakage of raw materials or products during the reaction process; the stirrer can continuously stir the ethylene carbonate and fluorine gas in the vessel to promote uniform mixing of the two raw materials and improve the reaction rate; the liquid inlet and gas inlet are used to accurately deliver the ethylene carbonate raw material and fluorine gas, respectively, to provide the necessary material basis for the reaction to start.

[0020] Furthermore, the corrosion-resistant fan is a Monel alloy centrifugal fan, and the suction pipe, shell, wire mesh demister, first grid plate, second grid plate and return air hole are all made of Monel alloy.

[0021] By adopting the above technical solutions, Monel alloy has excellent resistance to fluorine gas corrosion, which can be adapted to the highly corrosive environment in the production of fluoroethylene carbonate, and avoid the equipment service life due to corrosion damage to the components. At the same time, the material has both high strength and good machinability, which can ensure the long-term stable operation of each component, and has a higher cost performance than materials such as pure nickel, reducing the equipment manufacturing cost.

[0022] Furthermore, the mounting bracket is detachably connected to the vessel lid via Monel alloy bolts.

[0023] By adopting the above technical solution, the detachable connection method facilitates the installation, disassembly and maintenance of the mounting frame and the anti-corrosion fan on the frame by the staff. When the anti-corrosion fan fails and needs to be repaired or replaced, there is no need to disassemble the entire vessel cover, which simplifies the operation process and improves maintenance efficiency.

[0024] Furthermore, the housing is detachably connected to the intake pipe via Monel alloy bolts, and the return pipe is detachably connected to the mounting bracket via Monel alloy bolts.

[0025] By adopting the above technical solutions, the detachable design of the housing and the air intake pipe makes it easy to replace the wire mesh demister by disassembling the housing separately when it becomes clogged or damaged due to long-term use; the detachable design of the return air pipe and the mounting bracket makes it easy to inspect and maintain the return air pipe or return air hole, avoiding the need to replace the entire structure due to damage to local parts, thus reducing maintenance costs and operational difficulty.

[0026] In summary, the present invention has the following main advantages: 1. This utility model, through the setting of a corrosion-resistant fan, an intake pipe, and a return pipe, enables the corrosion-resistant fan to provide stable airflow power. Under its action, the intake pipe can form a negative pressure adsorption on the fluorine gas escaping upward in the reactor, achieving effective recovery of some of the escaped fluorine gas. The recovered fluorine gas is then transported back into the reactor through the return pipe, allowing some of the fluorine gas that might have been emitted with the tail gas to re-enter the reaction system of ethylene carbonate and fluorine gas, thereby reducing the amount of fluorine gas escaping; reducing the waste of fluorine raw materials; and improving the actual utilization rate of fluorine gas. 2. This utility model, through the arrangement of a shell, a wire mesh demister, a first grid plate, and a second grid plate, provides a stable installation support space for the wire mesh demister, the first grid plate, and the second grid plate. The first and second grid plates can limit the position of the wire mesh demister inside the shell, preventing it from shifting during the flow of fluorine gas. At the same time, before entering the suction pipe, the fluorine gas must pass through the first grid plate, the wire mesh demister, and the second grid plate in sequence. The wire mesh demister can effectively intercept ethylene carbonate droplets carried in the fluorine gas, and the intercepted droplets can flow back into the reactor along the shell structure, reducing the amount of droplets entering the corrosion-resistant fan. 3. This utility model, through the setting of return gas pipe and return gas holes, allows the return gas pipe to accurately guide the recovered and purified fluorine gas to the reaction area inside the reactor, while the distribution of multiple return gas holes ensures that the recovered fluorine gas is evenly discharged in the reactor, avoiding the problem of uneven mixing caused by local accumulation of fluorine gas. This allows the recovered fluorine gas to come into more complete contact with the ethylene carbonate raw material, further increasing the probability of fluorine gas participating in the reaction and reducing the escape of unreacted fluorine gas due to insufficient mixing. Thus, while improving the overall reaction efficiency, it further reduces raw material waste and improves the reaction uniformity of the recovered fluorine gas. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a cross-sectional structural diagram of the present invention; Figure 3 This is a schematic cross-sectional view of the mounting bracket of this utility model; Figure 4 This is an exploded view of the mounting bracket of this utility model; Figure 5This is a schematic diagram of the cross-sectional structure of the return air pipe of this utility model.

[0028] In the diagram: 1. Reactor; 2. Reactor lid; 3. Jacket; 4. Stirrer; 5. Liquid inlet; 6. Gas inlet pipe; 7. Liquid outlet; 8. Mounting bracket; 9. Corrosion-resistant fan; 10. Suction pipe; 11. Shell; 12. Wire mesh demister; 13. First grid plate; 14. Second grid plate; 15. Gas return pipe; 16. Gas return hole. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0030] The embodiments of this utility model will be described below based on its overall structure.

[0031] Example 1

[0032] An apparatus for synthesizing fluoroethylene carbonate, such as Figures 1-5As shown, the reactor includes a reactor vessel 1 and a vessel cover 2. A mounting bracket 8 is connected to one side of the top of the vessel cover 2. An anti-corrosion fan 9 is installed inside the mounting bracket 8. An air intake pipe 10 is connected to the air intake end of the anti-corrosion fan 9. A housing 11 is connected to the bottom of the air intake pipe 10. The housing 11 is located inside the reactor vessel 1 and is located above the interior. A wire mesh demister 12 is placed inside the housing 11. The lower part of the interior of the housing 11 is sloped. A first grid plate 13 and a second grid plate 14 are fixed to both ends of the housing 11, respectively. As the reaction progresses, some fluorine gas escapes upwards due to its own diffusion characteristics. At this time, the interior of the mounting bracket 8... The corrosion-resistant fan 9 at the top starts working; on one hand, the corrosion-resistant fan 9 draws in some of the escaping fluorine gas from the upper space inside the reactor 1 through the suction pipe 10, allowing the fluorine gas to pass through the first grid plate 13 and enter the interior of the shell 11; as the fluorine gas flows inside the shell 11, the wire mesh demister 12 inside the shell 11 intercepts the ethylene carbonate droplets carried in the fluorine gas, reducing the droplets from entering subsequent pipelines with the fluorine gas, while the sloping structure at the bottom inside the shell 11 guides the intercepted droplets along the slope towards the first grid plate 13, and finally the droplets pass through the first grid plate 13 and flow back to the reactor. Inside reactor 1, the fluorine gas, after being intercepted by dripping, continues to pass through the second grid plate 14 and enters the suction pipe 10. A return gas pipe 15 is connected to one side of the bottom of the mounting bracket 8. The bottom of the return gas pipe 15 is located below the interior of reactor 1. The top of the return gas pipe 15 connects to the outlet of the corrosion-resistant fan 9 through a circular hole inside the mounting bracket 8. The bottom of the return gas pipe 15 is annular, with an inner diameter larger than that of the stirrer 4. Multiple return gas holes 16 are provided at the bottom of the return gas pipe 15, arranged in a circular array. The corrosion-resistant fan 9 connects to its own outlet... The connected return gas pipe 15 delivers fluorine gas to the lower part of the reactor 1. The bottom of the return gas pipe 15 is annular, and its inner diameter is larger than that of the stirrer 4, which can avoid interference with the operation of the stirrer 4. The multiple return gas holes 16 arranged in a ring at the bottom of the return gas pipe 15 can evenly discharge the pressurized fluorine gas into the ethylene carbonate raw material at the lower part of the reactor 1, avoiding local accumulation of fluorine gas and uneven mixing. This allows the recovered fluorine gas to fully contact the ethylene carbonate again and participate in the reaction, further reducing fluorine gas escape and waste, and improving fluorine gas utilization.

[0033] See Figure 1 and Figure 2In the above embodiment, a jacket 3 is installed on the outside of the reactor 1, a liquid outlet 7 is provided at the bottom of the reactor 1, a lid 2 is connected to the top of the reactor 1, a stirrer 4 is installed in the middle of the top of the lid 2, and a liquid inlet 5 and a gas inlet 6 are respectively connected to the top of the lid 2. The operator injects ethylene carbonate raw material into the reactor 1 through the liquid inlet 5 and introduces fluorine gas into the reactor through the gas inlet 6. During this process, the jacket 3 outside the reactor 1 is started simultaneously, and the ambient temperature inside the reactor is adjusted according to the temperature conditions required for the reaction to provide a suitable temperature guarantee for the reaction. The stirrer 4 in the middle of the top of the lid 2 is also started to continuously stir the ethylene carbonate and fluorine gas in the reactor to promote full contact between the two raw materials to start the reaction. After the reaction is completed, the generated fluoroethylene carbonate is discharged from the liquid outlet 7 at the bottom of the reactor 1, completing the single fluoroethylene carbonate synthesis operation.

[0034] Example 2

[0035] Based on the above embodiment one, in order to reduce the occurrence of structural corrosion damage, the following settings are now implemented.

[0036] See Figures 1-5 In the above embodiments, the corrosion-resistant fan 9 is a Monel alloy centrifugal fan. The suction pipe 10, the housing 11, the wire mesh demister 12, the first grid plate 13, the second grid plate 14, and the return air hole 16 are all made of Monel alloy. The parts that will come into direct contact with fluorine gas and ethylene carbonate are all made of Monel alloy to avoid corrosion of the parts by fluorine gas and ethylene carbonate. Made of Monel alloy, it has excellent resistance to fluorine gas corrosion, and has high strength and good machinability. It can be adapted to the production environment of fluoroethylene carbonate, has a high cost performance, and ensures long-term stable operation.

[0037] Example 3

[0038] Based on the above embodiment 1, in order to facilitate the replacement of the housing 11 and the return air pipe 15, the following settings are now adopted.

[0039] See Figures 1-4In the above embodiment, the mounting bracket 8 is detachably connected to the vessel cover 2 via Monel alloy bolts, the shell 11 is detachably connected to the suction pipe 10 via Monel alloy bolts, and the return pipe 15 is detachably connected to the mounting bracket 8 via Monel alloy bolts. When the wire mesh demister 12 or the return pipe 15 is damaged, the operator first separates the vessel cover 2 from the reactor 1. The cover is disassembled using traditional methods, such as flange connection. Then, the operator can remove the Monel alloy bolts between the shell 11 and the suction pipe 10, thereby removing the shell 11 and the wire mesh demister. The first and second grilles of the demister 12 are replaced together. If the return air pipe 15 is to be replaced, the Monel alloy bolts between the return air pipe 15 and the mounting bracket 8 are fixed to the mounting bracket 8. Therefore, the operator only needs to remove the Monel alloy nuts to remove the return air pipe 15 for replacement. If the corrosion-resistant fan 9 or the mounting bracket 8 is damaged, the operator can remove the Monel alloy bolts between the mounting bracket 8 and the vessel cover 2 after removing the housing 11 and the return air pipe 15, and then replace the corrosion-resistant fan 9 and the mounting bracket 8. The installation operation is the reverse of the disassembly operation.

[0040] The implementation principle of this utility model is as follows: First, the operator starts the device through the external control cabinet; at the same time, the operator injects ethylene carbonate raw material into the reactor 1 through the liquid inlet 5 and introduces fluorine gas into the reactor through the gas inlet pipe 6; during this process, the jacket 3 outside the reactor 1 is started synchronously, and the ambient temperature inside the reactor is adjusted according to the temperature conditions required for the reaction to provide a suitable temperature guarantee for the reaction, while the stirrer 4 in the middle of the top of the reactor lid 2 is also started to continuously stir the ethylene carbonate and fluorine gas in the reactor to promote full contact between the two raw materials to start the reaction. As the reaction progresses, some fluorine gas escapes upwards due to its own diffusion characteristics. At this time, the corrosion-resistant fan 9 inside the mounting frame 8 starts to work. On one hand, the corrosion-resistant fan 9 draws in some of the escaped fluorine gas in the upper space inside the reactor 1 through the suction pipe 10, allowing the fluorine gas to pass through the first grid plate 13 and enter the interior of the shell 11. When the fluorine gas flows inside the shell 11, the wire mesh demister 12 inside the shell 11 intercepts the ethylene carbonate droplets carried in the fluorine gas, reducing the droplets from entering subsequent pipelines with the fluorine gas. Meanwhile, the sloping structure at the bottom inside the shell 11 guides the intercepted droplets to flow along the slope towards the first grid plate 13. Finally, the droplets pass through the first grid plate 13 and flow back into the reactor 1. The fluorine gas that has completed the droplet interception continues to pass through the second grid plate 14 and enter the suction pipe 10. The production process of the pre-filter of the anti-corrosion fan 9 is as follows: the workers first put the wire mesh demister 12 into the housing 11, and then the workers place the first grid plate 13 and the second grid plate 14 at the corresponding positions at both ends of the housing 11 and weld them to fix them, so as to limit the position of the wire mesh demister 12. The corrosion-resistant fan 9 delivers fluorine gas to the lower part of the reactor 1 through the return gas pipe 15 connected to its own outlet. The bottom of the return gas pipe 15 is circular, and its inner diameter is larger than that of the stirrer 4, which can avoid interference with the stirrer 4 during operation. In addition, the multiple return gas holes 16 arranged in a circular array at the bottom of the return gas pipe 15 can evenly discharge the pressurized fluorine gas into the ethylene carbonate raw material at the lower part of the reactor 1, avoiding local accumulation of fluorine gas and uneven mixing. This allows the recovered fluorine gas to fully contact the ethylene carbonate again and participate in the reaction, further reducing fluorine gas escape and waste and improving fluorine gas utilization. After the reaction is complete, the generated fluoroethylene carbonate is discharged from the outlet 7 at the bottom of the reactor 1, completing the single synthesis of fluoroethylene carbonate. During equipment operation, parts that come into direct contact with fluorine gas and ethylene carbonate are made of materials such as Monel alloy and pure nickel to prevent corrosion from fluorine gas and ethylene carbonate. The Monel alloy material has excellent resistance to fluorine gas corrosion, as well as high strength and good machinability. It is suitable for the production environment of fluoroethylene carbonate, has a high cost performance, and ensures long-term stable operation. If there is a need for sealing between parts, perfluoroether rubber can be used. When the wire mesh demister 12 or the return gas pipe 15 is damaged, the operator first separates the vessel cover 2 from the reactor 1. The cover is disassembled using traditional methods, such as flange connection. Then, the operator can remove the Monel alloy bolts between the shell 11 and the suction pipe 10, thereby replacing the shell 11, the first grid of the wire mesh demister 12, and the second grid together. If the return gas pipe 15 is to be replaced, the Monel alloy bolts between the return gas pipe 15 and the mounting bracket 8 are fixed to the mounting bracket 8. Therefore, the operator only needs to remove the Monel alloy nuts to remove the return gas pipe 15 for replacement. If the corrosion-resistant fan 9 or the mounting bracket 8 is damaged, after removing the shell 11 and the return gas pipe 15, the operator can remove the Monel alloy bolts between the mounting bracket 8 and the vessel cover 2 to replace the corrosion-resistant fan 9 and the mounting bracket 8. The installation operation is the reverse of the disassembly operation.

[0041] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A device for synthesizing fluoroethylene carbonate, comprising a reaction vessel (1) and a vessel lid (2), characterized in that: The top side of the lid (2) is connected to a mounting bracket (8), and an anti-corrosion fan (9) is installed inside the mounting bracket (8). The air inlet of the anti-corrosion fan (9) is connected to a suction pipe (10), and the bottom of the suction pipe (10) is connected to a housing (11). A wire mesh demister (12) is placed inside the housing (11). The two ends of the housing (11) are respectively fixed with a first grid plate (13) and a second grid plate (14). The bottom side of the mounting bracket (8) is connected to a return air pipe (15), and a return air hole (16) is opened at the bottom of the return air pipe (15).

2. The apparatus for synthesizing fluoroethylene carbonate according to claim 1, characterized in that: The shell (11) is located above the inside of the reactor (1), and the bottom of the return gas pipe (15) is located below the inside of the reactor (1). The top of the return gas pipe (15) is connected to the outlet of the anti-corrosion fan (9) through a round hole in the mounting bracket (8).

3. The apparatus for synthesizing fluoroethylene carbonate according to claim 2, characterized in that: The lower part of the interior of the shell (11) is sloped.

4. The apparatus for synthesizing fluoroethylene carbonate according to claim 2, characterized in that: The bottom of the return pipe (15) is circular, and the inner diameter of the circular ring is larger than the diameter of the stirrer (4).

5. The apparatus for synthesizing fluoroethylene carbonate according to claim 1, characterized in that: The return air holes (16) are provided in multiple ways, and the multiple return air holes (16) are distributed in a ring array.

6. The apparatus for synthesizing fluoroethylene carbonate according to claim 1, characterized in that: The reactor (1) is equipped with a jacket (3) on the outside, and a liquid outlet (7) is provided at the bottom of the reactor (1).

7. The apparatus for synthesizing fluoroethylene carbonate according to claim 6, characterized in that: The lid (2) is connected to the top of the reactor (1), and a stirrer (4) is installed in the middle of the top of the lid (2). The top of the lid (2) is connected to a liquid inlet (5) and an air inlet pipe (6).

8. The apparatus for synthesizing fluoroethylene carbonate according to claim 1, characterized in that: The corrosion-resistant fan (9) is a Monel alloy centrifugal fan, and the suction pipe (10), shell (11), wire mesh demister (12), first grid plate (13), second grid plate (14) and return air hole (16) are all made of Monel alloy.

9. The apparatus for synthesizing fluoroethylene carbonate according to claim 1, characterized in that: The mounting bracket (8) is detachably connected to the vessel lid (2) by Monel alloy bolts.

10. The apparatus for synthesizing fluoroethylene carbonate according to claim 9, characterized in that: The housing (11) is detachably connected to the intake pipe (10) by Monel alloy bolts, and the return pipe (15) is detachably connected to the mounting bracket (8) by Monel alloy bolts.

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