Temperature-adjustable photocatalytic reactor in preparation of chloroethylene carbonate
By designing leak-proof and mixing mechanisms, the problems of gas leakage and uneven catalyst distribution in the chloroethylene carbonate reactor were solved, thereby improving the safety and efficiency of the reactor.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-01
- Publication Date
- 2026-03-10
AI Technical Summary
Existing chloroethylene carbonate photocatalytic reactors are prone to leaking harmful gases under temperature and pressure fluctuations, and the magnetic stirring effect is poor, resulting in uneven catalyst distribution and reduced photocatalytic efficiency.
The design incorporates a leak prevention mechanism and a mixing mechanism. The leak prevention mechanism monitors for leaks and issues an alarm via an expansion membrane and pressure sensor, while the mixing mechanism uses a servo motor to drive the stirring plate and stirring blades to achieve uniform mixing and heating.
It effectively avoids gas leakage, ensures system safety, improves mixing efficiency and catalyst distribution uniformity, and enhances reactor safety and stability.
Smart Images
Figure CN223980484U_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of photocatalytic reactor technology, and in particular to an adjustable temperature photocatalytic reactor for the preparation of chloroethylene carbonate. Background Technology
[0002] Ethylene chloride carbonate is an important chemical intermediate widely used in lithium-ion battery electrolytes, pharmaceutical synthesis, and organic synthesis. Its synthesis process typically involves photocatalytic reactions, where photocatalysts induce photochemical reactions in the raw materials under ultraviolet or visible light irradiation.
[0003] Existing photocatalytic reactors for ethylene chlorocarbonate lack leak-proof structures when connecting their exhaust ports and pipes. Under fluctuating temperature and pressure conditions, the joint materials are prone to aging, deformation, or poor sealing, leading to the leakage of harmful gases. This can introduce toxic and hazardous gases into the working environment, potentially causing serious safety accidents. Furthermore, existing reactors typically use magnetic stirring to promote reactant mixing and ensure sufficient contact between the catalyst and reactants. However, the effectiveness of magnetic stirring decreases significantly when catalyst or products tend to deposit, especially when catalyst or deposits accumulate at the bottom or walls of the reactor. Insufficient stirring force results in uneven catalyst distribution, localized concentration differences, and a slowed reaction rate. In addition, insufficient exposure of the catalyst to ultraviolet light reduces photocatalytic efficiency, thus affecting the synthesis of ethylene chlorocarbonate. Utility Model Content
[0004] In view of this, the purpose of this utility model is to propose an adjustable temperature photocatalytic reactor for the preparation of chloroethylene carbonate, so as to solve the problems that when the exhaust port and exhaust pipe of the reactor are connected, no anti-leakage structure is set, which easily causes the leakage of harmful gases under the condition of temperature and pressure fluctuations, and the existing magnetic stirring effect is poor.
[0005] To achieve the above objectives, this utility model provides an adjustable temperature photocatalytic reactor for the preparation of chloroethylene carbonate, comprising a support frame, two fixing rings fixedly connected to the side wall of the support frame, a transparent reaction vessel fixedly connected inside the two fixing rings, an inlet and an exhaust pipe fixedly connected to the top of the transparent reaction vessel, an outlet fixedly connected to the bottom of the transparent reaction vessel, a rotating ring rotatably connected to the top of the transparent reaction vessel, an ultraviolet lamp fixedly connected inside the rotating ring, the bottom end of the ultraviolet lamp extending into the interior of the transparent reaction vessel, a connecting pipe installed on the top of the exhaust pipe, flanges provided on opposite sides of the exhaust pipe and the connecting pipe, the flanges being fixed together by bolts, a leak-proof mechanism provided on the outer wall of the exhaust pipe and the connecting pipe, and a mixing mechanism provided inside the transparent reaction vessel.
[0006] Preferably, the leak-proof mechanism includes two protective covers, both of which are fixedly connected to the outer walls of the exhaust pipe and the connecting pipe. The two protective covers are fixedly connected by bolts. An expansion membrane is fixedly connected to the outer wall of the exhaust pipe and the connecting pipe near the outer wall of the flange. A slide cylinder is fixedly connected to the top of the protective cover. A lifting rod is slidably connected inside the slide cylinder. A pressure sensor is fixedly connected to the top of the inner wall of the slide cylinder. An alarm light is fixedly connected to the top of the protective cover.
[0007] Preferably, a groove is provided at the bottom of the flange at one end of the connecting pipe, a telescopic spring is fixedly connected inside the groove, a lower pressure plate is fixedly connected at the bottom end of the telescopic spring, the lower pressure plate is slidably connected in the groove, a corrugated protrusion is fixedly connected at the top of the flange at one end of the exhaust pipe, a sealing ring is provided between the lower pressure plate and the corrugated protrusion, and the bottom of the lower pressure plate and the top of the corrugated protrusion are adapted to each other.
[0008] Preferably, the mixing mechanism includes a servo motor, which is fixedly connected to the outer wall of the support frame via a fixing plate. A gear is fixedly connected to the output end of the servo motor, and a gear ring meshes with the outer wall of the gear. The gear ring is fixedly connected to the outer wall of the rotating ring. Stirring rods are fixedly connected to both sides of the rotating ring. Multiple equidistant and uniformly distributed stirring plates are fixedly connected to the outer walls of the stirring rods. Scrapers are fixedly connected between the outer walls of the stirring plates. The outer walls of the scrapers are in contact with the inner wall of the transparent reaction vessel, and stirring blades are fixedly connected to the bottom of the scrapers.
[0009] Preferably, the transparent reaction vessel has an internal cavity, and hot water inlets and cold water inlets are fixedly connected to both sides of the outer wall of the transparent reaction vessel. The hot water inlets and cold water inlets are connected to the interior of the cavity.
[0010] Preferably, the bottom of the lifting rod is arc-shaped.
[0011] The beneficial effects of this utility model are:
[0012] 1. In the adjustable temperature photocatalytic reactor for the preparation of ethylene chlorocarbonate, leaking gas enters the expansion membrane through a leak-proof mechanism. The expansion membrane gradually expands within the protective cover, pushing the lifting rod. The lifting rod slides along the slide cylinder and presses against the pressure sensor. When the pressure sensor detects abnormal pressure, it sends a signal to the alarm light, triggering an alarm and promptly reminding personnel to perform maintenance or repairs. Simultaneously, the lower pressure plate compresses the sealing ring, ensuring it fits tightly against the surface of the corrugated protrusions. The sealing ring, through staggered compression with the lower pressure plate and corrugated protrusions, forms multiple sealing barriers, effectively preventing gas leakage due to gaps. This leak-proof mechanism not only enhances sealing performance and ensures system safety but also improves the operational safety of the reactor through real-time monitoring and alarm functions, reducing potential safety hazards, preventing toxic and harmful gases from entering the working environment and causing serious safety accidents, and protecting the safety of environmental protection personnel.
[0013] 2. An adjustable temperature photocatalytic reactor for the preparation of chloroethylene carbonate. This mixing mechanism heats the raw materials in the transparent reaction vessel through a hot water inlet and activates an ultraviolet lamp to provide photocatalytic energy. Simultaneously, a servo motor drives gears, a gear ring, and a stirring plate for efficient mixing. The rotation of the stirring plate drives the stirring blades to generate a vortex effect, thereby accelerating the mixing of reactants and the catalytic reaction. This mixing mechanism ensures uniform catalyst distribution, avoids the accumulation of deposits, and maintains uniform raw material temperature through sufficient heating and stirring, preventing temperature fluctuations from affecting the reaction rate and selectivity. Attached Figure Description
[0014] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0015] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;
[0016] Figure 2 This is a schematic diagram of the internal structure of the transparent reaction vessel of this utility model;
[0017] Figure 3 This is a schematic diagram of the leak-proof mechanism of this utility model;
[0018] Figure 4 This utility model Figure 3 Enlarged 3D structural diagram at point A;
[0019] Figure 5 This is a three-dimensional structural diagram of the hybrid mechanism of this utility model.
[0020] The diagram is marked as follows:
[0021] 1. Support frame; 2. Fixing ring; 3. Transparent reaction vessel; 4. Inlet; 5. Outlet; 6. Rotating ring; 7. Ultraviolet lamp; 8. Exhaust pipe; 9. Connecting pipe; 10. Flange; 11. Protective cover; 12. Expansion membrane; 13. Slide cylinder; 14. Lifting rod; 15. Pressure sensor; 16. Alarm light; 17. Groove; 18. Telescopic spring; 19. Lower pressure plate; 20. Corrugated protrusion; 21. Sealing ring; 22. Servo motor; 23. Gear; 24. Gear ring; 25. Stirring rod; 26. Stirring plate; 27. Scraper; 28. Stirring blade; 29. Cavity; 30. Hot water inlet; 31. Cold water inlet. Detailed Implementation
[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.
[0023] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.
[0024] like Figures 1 to 5 As shown, an adjustable temperature photocatalytic reactor for the preparation of chloroethylene carbonate includes a support frame 1. Two fixing rings 2 are fixedly connected to the side wall of the support frame 1. A transparent reaction vessel 3 is fixedly connected inside the two fixing rings 2. An inlet 4 and an exhaust pipe 8 are fixedly connected to the top of the transparent reaction vessel 3. An outlet 5 is fixedly connected to the bottom of the transparent reaction vessel 3. A rotating ring 6 is rotatably connected to the top of the transparent reaction vessel 3. An ultraviolet lamp 7 is fixedly connected inside the rotating ring 6. The bottom end of the ultraviolet lamp 7 extends into the interior of the transparent reaction vessel 3. A connecting pipe 9 is installed on the top of the exhaust pipe 8. A flange 10 is provided on the opposite side of the exhaust pipe 8 and the connecting pipe 9. The flanges 10 are fixed together by bolts. An anti-leakage mechanism is provided on the outer wall of the exhaust pipe 8 and the connecting pipe 9. A mixing mechanism is provided inside the transparent reaction vessel 3.
[0025] Further, see attached document. Figure 4 and Figure 5 As shown, the leak prevention mechanism includes two protective covers 11, both of which are fixedly connected to the outer walls of the exhaust pipe 8 and the connecting pipe 9. The two protective covers 11 are fixed together by bolts. An expansion membrane 12 is fixedly connected between the outer walls of the exhaust pipe 8 and the connecting pipe 9 near the outer wall of the flange 10. A slide cylinder 13 is fixedly connected to the top of the protective cover 11. A lifting rod 14 is slidably connected inside the slide cylinder 13. A pressure sensor 15 is fixedly connected to the top of the inner wall of the slide cylinder 13. An alarm light 16 is fixedly connected to the top of the protective cover 11. A groove 17 is opened at the bottom of the flange 10 at one end of the connecting pipe 9. A telescopic spring 18 is fixedly connected inside the groove 17. A lower pressure plate 19 is fixedly connected to the bottom end of the telescopic spring 18. The lower pressure plate 19 is slidably connected in the groove 17. A corrugated protrusion 20 is fixedly connected to the top of the flange 10 at one end of the exhaust pipe 8. A sealing ring 21 is provided between the lower pressure plate 19 and the corrugated protrusion 20. The bottom of the lower pressure plate 19 and the top of the corrugated protrusion 20 are matched in shape.
[0026] During use, the leak-proof mechanism connects to the connecting pipe 9 via the exhaust pipe 8 to remove byproduct gases or control internal pressure within the transparent reaction tank 3. One end of the connecting pipe 9 is connected to an external air purification device. When a leak occurs in the exhaust pipe 8, the leaking gas enters the expansion membrane 12. The expansion membrane 12 gradually expands within the protective cover 11 and pushes the lifting rod 14. The lifting rod 14 slides along the slide cylinder 13 and presses against the pressure sensor 15. After detecting abnormal pressure, the pressure sensor 15 sends a signal to the alarm light 16, triggering an alarm and promptly reminding personnel to perform maintenance or repairs. Simultaneously, the telescopic spring 18 pushes the lower pressure plate 19 with force. The lower pressure plate 19 further compresses the sealing ring 21, making it tightly adhere to the surface of the corrugated protrusion 20. The sealing ring 21 forms multiple sealing barriers through the staggered compression between the lower pressure plate 19 and the corrugated protrusion 20, effectively preventing gas leakage due to gaps. This leak-proof mechanism not only enhances sealing performance and ensures system safety, but also improves reactor operational safety through real-time monitoring and alarm functions, reduces potential safety hazards, helps improve work efficiency, and protects environmental protection and personnel safety.
[0027] Further, see attached document. Figure 2 and Figure 5As shown, the mixing mechanism includes a servo motor 22, which is fixedly connected to the outer wall of the support frame 1 via a fixing plate. A gear 23 is fixedly connected to the output end of the servo motor 22. A gear ring 24 meshes with the outer wall of the gear 23. The gear ring 24 is fixedly connected to the outer wall of the rotating ring 6. Stirring rods 25 are fixedly connected to both sides of the rotating ring 6. Multiple equidistant and evenly distributed stirring plates 26 are fixedly connected to the outer walls of the stirring rods 25. Scrapers 27 are fixedly connected between the outer walls of the stirring plates 26. The outer wall of the scraper 27 contacts the inner wall of the transparent reaction vessel 3. Stirring blades 28 are fixedly connected to the bottom of the scraper 27.
[0028] When the mixing mechanism is in use, the raw materials are first fed into the transparent reaction vessel 3 through the feed inlet 4, and then hot water is introduced into the transparent reaction vessel 3 through the hot water inlet 30 to heat the raw materials. During the heating process, the ultraviolet lamp 7 and the servo motor 22 are activated. The ultraviolet lamp 7 provides photocatalytic energy to promote the catalytic reaction of the materials. At the same time, the servo motor 22 drives the gear 23 to rotate, the gear 23 drives the gear ring 24 to rotate, the gear ring 24 further drives the stirring rod 25 to rotate, and then drives the stirring plate 26 to mix and stir. When the stirring plate 26 rotates, the scraper 27 also rotates, and the scraper 27 drives the stirring blade 28 to rotate, forming a vortex effect, which further accelerates the stirring and mixing of the materials. This process can not only quickly and evenly stir multiple raw materials, but also ensure that the raw materials are fully heated, avoiding overheating or temperature fluctuations of the raw materials near the inner wall of the transparent reaction vessel 3, thereby ensuring that the reaction rate and selectivity are not affected.
[0029] The mixing mechanism heats the raw materials in the transparent reaction vessel 3 through the hot water inlet 30 and activates the ultraviolet lamp 7 to provide photocatalytic energy. At the same time, the servo motor 22 drives the gear 23, gear ring 24 and stirring plate 26 for efficient mixing. The rotation of the stirring plate 26 drives the stirring blade 28 to generate a vortex effect, thereby accelerating the mixing of reactants and catalytic reaction. This mixing mechanism can ensure uniform distribution of catalyst, avoid the accumulation of deposits, and maintain the temperature of raw materials uniform through sufficient heating and stirring, avoiding temperature fluctuations from affecting the reaction rate and selectivity.
[0030] After catalysis is complete, outlet 5 is opened to discharge the chloroethylene carbonate obtained from the catalytic reaction. If scale or a crystallizing layer forms on the inner wall of the transparent reaction vessel 3, scraper 27 will scrape off these byproducts and discharge them to the outside of the transparent reaction vessel 3 through outlet 5. This design effectively improves the mixing efficiency and heat distribution of the raw materials, while ensuring the stability of the reaction process and the catalytic efficiency.
[0031] Further, see attached document. Figure 2As shown, the transparent reaction vessel 3 has an internal cavity 29. Hot water inlets 30 and cold water inlets 31 are fixedly connected to both sides of the outer wall of the transparent reaction vessel 3. Both hot water inlets 30 and cold water inlets 31 are connected to the inside of the cavity 29. Hot water is injected through the hot water inlet 30 to improve the catalytic efficiency of the raw materials. When the temperature inside the transparent reaction vessel 3 is too high, a certain amount of hot water is extracted from the hot water inlet 30 and a certain amount of cold water is injected through the cold water inlet 31, thereby regulating the temperature inside the transparent reaction vessel 3.
[0032] Further, see attached document. Figure 3 As shown, the bottom of the lifting rod 14 is arc-shaped. The shape of the bottom of the lifting rod 14 prevents the bottom of the lifting rod 14 from being too sharp and piercing the surface of the expansion film 12 when the expansion film 12 expands.
Claims
1. A temperature-adjustable photocatalytic reactor for the preparation of chloroethylene carbonate, comprising a support frame (1), wherein two fixing rings (2) are fixedly connected to the side wall of the support frame (1), and a transparent reaction vessel (3) is fixedly connected inside the two fixing rings (2), wherein an inlet (4) and an exhaust pipe (8) are fixedly connected to the top of the transparent reaction vessel (3), and an outlet (5) is fixedly connected to the bottom of the transparent reaction vessel (3), characterized in that: The top of the reaction transparent tank (3) is rotatably connected with a rotating ring (6), the inside of the rotating ring (6) is fixedly connected with an ultraviolet lamp (7), the bottom end of the ultraviolet lamp (7) extends into the inside of the reaction transparent tank (3), the top of the exhaust pipe (8) is provided with a connecting pipe (9), the opposite sides of the exhaust pipe (8) and the connecting pipe (9) are provided with flanges (10), the flanges (10) are fixed by bolts, the outer walls of the exhaust pipe (8) and the connecting pipe (9) are provided with a leakage prevention mechanism, and the inside of the reaction transparent tank (3) is provided with a mixing mechanism.
2. A temperature adjustable photocatalytic reactor for the preparation of chloro ethylene carbonate according to claim 1, characterized in that, The leakage prevention mechanism comprises two protective covers (11), the two protective covers (11) are fixedly connected to the outer walls of the exhaust pipe (8) and the connecting pipe (9), the two protective covers (11) are fixed by bolts, the outer walls of the exhaust pipe (8) and the connecting pipe (9) are fixedly connected with expansion membranes (12) near the flanges (10), the top of the protective cover (11) is fixedly connected with a sliding cylinder (13), the inside of the sliding cylinder (13) is slidably connected with a lifting rod (14), the inner wall top of the sliding cylinder (13) is fixedly connected with a pressure sensor (15), and the top of the protective cover (11) is fixedly connected with an alarm lamp (16).
3. A temperature adjustable photocatalytic reactor for the preparation of chloro ethylene carbonate according to claim 2, characterized in that, The bottom of the flange (10) of one end of the connecting pipe (9) is provided with a groove (17), the inside of the groove (17) is fixedly connected with a telescopic spring (18), the bottom end of the telescopic spring (18) is fixedly connected with a pressing plate (19), the pressing plate (19) is slidably connected in the groove (17), the top of the flange (10) of one end of the exhaust pipe (8) is fixedly connected with a wave-shaped lug (20), the pressing plate (19) and the wave-shaped lug (20) are provided with a sealing ring (21), and the bottom of the pressing plate (19) and the top of the wave-shaped lug (20) are shaped to be matched.
4. A temperature tunable photocatalytic reactor for the preparation of chloro ethylene carbonate according to claim 1, characterized in that, The mixing mechanism comprises a servo motor (22), the servo motor (22) is fixedly connected to the outer wall of the support frame (1) through a fixed plate, the output end of the servo motor (22) is fixedly connected with a gear (23), the outer wall of the gear (23) is engaged with a toothed ring (24), the toothed ring (24) is fixedly connected to the outer wall of the rotating ring (6), the two sides of the rotating ring (6) are fixedly connected with stirring rods (25), the outer walls of the stirring rods (25) are fixedly connected with a plurality of stirring plates (26) which are equidistantly and uniformly distributed, the outer walls of the stirring plates (26) are fixedly connected with scrapers (27), the outer wall of the scraper (27) is in contact with the inner wall of the reaction transparent tank (3), and the bottom of the scraper (27) is fixedly connected with stirring blades (28).
5. A temperature tunable photocatalytic reactor for the preparation of chloro ethylene carbonate according to claim 1, characterized in that, The inside of the reaction transparent tank (3) is provided with a cavity (29), the outer walls of the reaction transparent tank (3) are fixedly connected with hot water inlets (30) and cold water inlets (31) on the two sides, and the hot water inlets (30) and the cold water inlets (31) are in communication with the inside of the cavity (29).
6. A temperature tunable photocatalytic reactor for the preparation of chloro ethylene carbonate according to claim 2, characterized in that, The bottom of the lifting rod (14) is arc-shaped.