A methyl ethyl carbonate reaction-separation integrated device

Abstract

The utility model relates to the field of chemical reaction equipment provides a kind of methyl ethyl carbonate reaction separation integrated device, including lower kettle body, middle section kettle body and kettle cover, middle section kettle body is connected in lower kettle body top, and kettle cover is connected in middle section kettle body top;Kettle cover is equipped with cooling body inside, condenser pipe is equipped in cooling body, and cooling body and the inner wall of kettle cover form cold gas cavity between;Cooling body is respectively communicated with hot gas inlet pipe, liquid return pipe and exhaust pipe.The application carries out cascade condensation to ascending hot gas by double cooling structure of inside and outside nesting, improves gas-liquid separation efficiency and reflux effect, realizes the efficient coupling of reaction and separation process.

Description

Technical Field

[0001] This application relates to the field of chemical reaction equipment, specifically to an integrated device for the reaction and separation of methyl ethyl carbonate. Background Technology

[0002] In the chemical production of methyl ethyl carbonate (ME), reaction and separation are the core processes. Traditionally, these processes are carried out separately, with the reaction completed in a reactor before being transferred to a distillation column for purification. With the development of integrated technology, achieving reaction and reflux within a single device is becoming the trend. However, existing reaction and separation equipment still has limitations in terms of integrated design.

[0003] For example, the reaction vessel in publication number CN102441359A has the reaction and condensation processes distributed in different tanks, which easily leads to heat loss and a large footprint. Similarly, the distillation column in publication number CN116020154B focuses on distillation separation and lacks a design compatible with the reaction process. It does not integrate a dedicated reaction zone, making it difficult to remove byproducts in a timely manner, inhibiting the shift of reaction equilibrium towards the product side, and failing to meet the high-efficiency requirements of modern industry for integrated reaction and separation devices. Utility Model Content

[0004] To address the problems of low reaction-separation integration, insufficient condensation reflux efficiency, and untimely removal of byproducts in existing technologies, this application proposes an integrated reaction-separation device for methyl ethyl carbonate, which achieves efficient coupling of the reaction and separation processes and step-by-step condensation.

[0005] To achieve the above objectives, this application adopts the following technical solution: An integrated reaction and separation device for methyl ethyl carbonate includes a lower vessel, a middle vessel, and a vessel cover. The middle vessel is connected above the lower vessel and the vessel cover is connected to the top of the middle vessel. A cooling body is provided inside the vessel cover, and a condenser is provided inside the cooling body. A cold air cavity is formed between the cooling body and the inner wall of the vessel cover. The cooling body is connected to a hot gas inlet pipe, a liquid return pipe, and an exhaust pipe.

[0006] The above scheme improves gas-liquid separation efficiency by constructing a dual cooling space layout inside the vessel lid, consisting of condenser tubes inside the cooling body and cold air chambers outside the cooling body, and using the nested structure to condense the rising hot gas in stages. At the same time, the three-section connection structure of the lower vessel body, the middle vessel body and the vessel lid provides a physical basis for the functional division of the reaction zone and the separation zone.

[0007] In one implementation, the two ends of the condenser are connected to an inlet pipe and a return pipe, respectively; the cold air chamber is connected to a circulating cold air pipe.

[0008] This implementation provides cooling media to the condenser and the cooling chamber through independent media pipelines, ensuring the heat exchange independence of each cooling unit in the dual cooling structure. This facilitates the adjustment of the intensity of internal water cooling and external air cooling according to the operating conditions, thus optimizing thermal energy management.

[0009] In one implementation, a sealing structure is provided between the cooling body and the vessel lid to seal and isolate the cold air cavity from the inner cavity formed by the lower vessel body and the middle vessel body; the condenser tube is arranged in a variable diameter coiled shape within the cooling body.

[0010] This implementation method ensures physical isolation between the cold air chamber and the reaction chamber through a sealed structure, preventing the leakage of cooling medium, contaminants, or reaction gases from entering the cooling system.

[0011] In one embodiment, the side of the middle section of the vessel body is provided with an installation groove, and a gear set and a drive assembly are installed in the installation groove. The power output end of the drive assembly is connected to the input end of the gear set, and the output end of the gear set is connected to a stirring rod. The lower end of the stirring rod extends downward and into the lower vessel body.

[0012] This embodiment utilizes the mounting groove on the side of the middle section of the vessel body to accommodate the drive assembly and gear set, realizing a modular layout of the stirring drive mechanism. This avoids the traditional top-mounted motor occupying too much top space, while also reserving sufficient installation space for the cooling structure inside the vessel lid.

[0013] In one embodiment, the lower vessel is surrounded by a heating jacket, and the heating jacket contains heating wires arranged in a spiral pattern; a discharge valve and a temperature detector are installed at the bottom of the lower vessel.

[0014] This implementation uses spirally arranged heating wires to make the lower vessel body heat more evenly, avoiding side reactions caused by local overheating; the discharge valve at the bottom works in conjunction with a temperature detector to achieve precise temperature control and discharge control of the reactants, ensuring the stability of the reaction process.

[0015] In one embodiment, a support leg is installed at the bottom of the lower vessel, and a reinforcing rod is connected between the support legs.

[0016] This implementation method enhances the overall structural rigidity and load-bearing capacity of the device through the support frame composed of support legs and reinforcing rods, ensuring the stability of the three-section vessel under full-load operation and vibration conditions.

[0017] In one implementation, the lower vessel body and the middle vessel body, as well as the middle vessel body and the vessel cover, are connected by flanges; the vessel cover is an elliptical container assembled from the upper and lower parts.

[0018] This implementation method uses flange connections to enable the disassembly and assembly of each section of the vessel, which facilitates the installation, maintenance and cleaning of internal components; the elliptical composite vessel cover has better pressure resistance than the flat-top head and is conducive to the collection and reflux of condensate along the inner wall.

[0019] Beneficial effects 1. This application changes the traditional single condensation mode by setting up a nested double cooling structure consisting of a cooling body and a cold gas chamber inside the vessel lid. After the hot gas enters the cooling body through the hot gas inlet pipe, it is further cooled by the direct water cooling effect of the internal condenser and the external air cooling effect of the cold gas chamber. This stepped condensation mechanism significantly improves the separation accuracy and reflux efficiency of light and heavy components, which is conducive to promoting the shift of reaction equilibrium towards the product direction.

[0020] 2. This application adopts a three-section modular structure consisting of a lower vessel body, a middle vessel body, and a vessel cover, and integrates the stirring drive component into the mounting groove of the middle vessel body. This layout not only optimizes the center of gravity distribution and space utilization of the equipment, but also makes the reaction zone, driving zone, and separation zone relatively independent in structure. This ensures sufficient stirring during the reaction process and avoids interference of the driving component with the top condensation space, thereby improving the overall integration and ease of maintenance of the device.

[0021] 3. This application, through the design of flange connection and elliptical composite vessel lid, balances the sealing and pressure resistance performance of the equipment with the ease of disassembly and assembly. Combined with the uniform heating structure of the spiral heating wire in the lower vessel body, as well as the temperature control and discharge components at the bottom, it ensures that the synthesis reaction of methyl ethyl carbonate proceeds under stable and controllable thermodynamic conditions, effectively reducing the generation of by-products and improving product quality and production efficiency. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the integrated reaction and separation device for methyl ethyl carbonate according to an embodiment of this application.

[0023] Among them, 1-support leg, 2-reinforcing rod, 3-lower vessel body, 4-heating jacket, 5-heating wire, 6-middle section vessel body, 7-feed pipe, 8-installation groove, 9-drive assembly, 10-stirring rod, 11-vessel cover, 12-cooling body, 13-condenser tube, 14-exhaust pipe, 15-return pipe, 16-hot gas inlet pipe, 17-discharge valve, 18-temperature detector. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0026] Example 1 like Figure 1 As shown, this embodiment provides an integrated reaction and separation device for methyl ethyl carbonate. The device includes a lower vessel body 3, a middle vessel body 6, and a vessel cover 11. The middle vessel body 6 is connected above the lower vessel body 3, and the vessel cover 11 is connected to the top of the middle vessel body 6. Specifically, support legs 1 are installed at the bottom of the lower vessel body 3, and reinforcing rods 2 are connected between the support legs 1 to enhance the overall structural rigidity and load-bearing capacity of the device, ensuring the stability of the three-section vessel body under full-load operation and vibration conditions. The lower vessel body 3 and the middle vessel body 6, as well as the middle vessel body 6 and the vessel cover 11, are connected by flanges. This detachable connection method facilitates the installation, maintenance, and cleaning of internal components. The vessel cover 11 is an elliptical container formed by the upper and lower sections, which has better pressure resistance than a flat-topped head, and its streamlined inner wall facilitates the collection and reflux of condensate along the wall surface, reducing dead zones.

[0027] A cooling body 12 is installed inside the vessel lid 11, and a condenser tube 13 is installed inside the cooling body 12. A cold air cavity is formed between the cooling body 12 and the inner wall of the vessel lid 11. The cooling body 12 is connected to a hot gas inlet pipe 16, a liquid return pipe 15, and an exhaust pipe 14. Specifically, a sealing structure is provided between the cooling body 12 and the vessel lid 11 to seal and isolate the cold air cavity from the reaction cavity formed by the lower vessel body 3 and the middle vessel body 6, preventing leakage of cooling medium that contaminates materials or allows reaction gases to enter the cooling system. The condenser tube 13 is arranged in a variable diameter coiled shape inside the cooling body 12. This shape not only increases the heat exchange area but also extends the path of the airflow inside the cooling body, enhancing turbulence and improving heat exchange efficiency. The two ends of the condenser tube 13 are connected to a water inlet pipe and a water return pipe, respectively, for introducing liquid cooling medium; the cold air cavity is connected to a circulating cold air pipe for introducing gaseous cooling medium. Through the above structure, the interior of the vessel lid 11 is constructed with a dual cooling space layout consisting of internal water cooling (condenser tube 13) and external air cooling (cold air cavity). The two are physically independent but form a stepped cooperation in heat exchange, which significantly improves the separation accuracy of light and heavy components.

[0028] The middle section of the vessel body 6 has a mounting groove 8 on its side, where a gear set and a drive assembly 9 are installed. The power output end of the drive assembly 9 is connected to the input end of the gear set, and the output end of the gear set is connected to a stirring rod 10. The lower end of the stirring rod 10 extends downward and into the lower vessel body 3. Specifically, by using the mounting groove 8 on the side of the middle section of the vessel body 6 to accommodate the drive assembly 9 and the gear set, a centrally located and modular layout of the stirring drive mechanism is achieved. This design avoids the traditional top-mounted motor occupying too much top space, thus reserving sufficient installation space for the dual cooling structure inside the vessel lid 11, while also optimizing the center of gravity distribution of the equipment, making the overall structure more compact.

[0029] The lower vessel body 3 is surrounded by a heating jacket 4, and the heating jacket 4 contains spirally arranged heating wires 5. A discharge valve 17 and a temperature detector 18 are installed at the bottom of the lower vessel body 3. Specifically, the spirally arranged heating wires 5 can make the lower vessel body 3 heat more evenly and avoid side reactions caused by local overheating; the discharge valve 17 at the bottom is used to discharge the material after the reaction is completed, and the temperature detector 18 monitors the temperature inside the vessel in real time. The two work together to achieve precise temperature control and discharge control of the reaction process, ensuring the stability of the methyl ethyl carbonate synthesis reaction.

[0030] During operation, the hot gas generated by the reaction enters the cooling body 12 through the hot gas inlet pipe 16. It is directly cooled by water through the condenser pipe 13 and further cooled by external air cooling within the cooling chamber, achieving deep condensation or separation of the light components. The condensate flows back into the reactor through the return pipe 15 to continue participating in the reaction or for collection, while non-condensable gases or light components are discharged through the exhaust pipe 14. The entire process achieves integrated coupling of reaction and separation based on the physical connection of hardware channels, eliminating the need for additional conveying equipment, effectively reducing heat loss and improving production efficiency.

[0031] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An integrated device for the reaction and separation of methyl ethyl carbonate, characterized in that, It includes a lower vessel body (3), a middle vessel body (6) and a vessel cover (11), wherein the middle vessel body (6) is connected above the lower vessel body (3) and the vessel cover (11) is connected to the top of the middle vessel body (6); The kettle lid (11) is provided with a cooling body (12), and the cooling body (12) is provided with a condenser (13). A cold air cavity is formed between the cooling body (12) and the inner wall of the kettle lid (11). The cooling body (12) is connected to a hot gas inlet pipe (16), a liquid return pipe (15), and an exhaust pipe (14).

2. The integrated reaction and separation device for methyl ethyl carbonate according to claim 1, characterized in that, The two ends of the condenser tube (13) are respectively connected to a water inlet pipe and a water return pipe; the cold air cavity is connected to a circulating cold air pipe.

3. The integrated reaction and separation device for methyl ethyl carbonate according to claim 2, characterized in that, A sealing structure is provided between the cooling body (12) and the vessel cover (11) to seal and isolate the cold air cavity from the inner cavity formed by the lower vessel body (3) and the middle vessel body (6); the condenser tube (13) is arranged in a variable diameter coiled shape inside the cooling body (12).

4. The integrated reaction and separation device for methyl ethyl carbonate according to claim 1, characterized in that, The middle section of the vessel body (6) is provided with a mounting groove (8) on its side. A gear set and a drive assembly (9) are installed in the mounting groove (8). The power output end of the drive assembly (9) is connected to the input end of the gear set. The output end of the gear set is connected to a stirring rod (10). The lower end of the stirring rod (10) extends downward and into the lower vessel body (3).

5. The integrated reaction and separation device for methyl ethyl carbonate according to claim 4, characterized in that, The lower vessel body (3) is surrounded by a heating sleeve (4), and the heating sleeve (4) is provided with heating wires (5) arranged in a spiral shape; a discharge valve (17) and a temperature detector (18) are installed at the bottom of the lower vessel body (3).

6. The integrated reaction and separation device for methyl ethyl carbonate according to claim 1, characterized in that, The bottom of the lower vessel body (3) is equipped with support legs (1), and reinforcing rods (2) are connected between the support legs (1).

7. The integrated reaction and separation device for methyl ethyl carbonate according to claim 1, characterized in that, The lower vessel body (3) and the middle vessel body (6), as well as the middle vessel body (6) and the vessel cover (11), are connected by flanges; the vessel cover (11) is an elliptical container assembled from the upper and lower parts.

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