A high heat transfer tube reactor structure for a gas phase fluorination reaction

Abstract

The utility model discloses a high heat transfer pipe type reactor structure for gas phase fluorination reaction in the technical field of pipe type reactor, including the protective shell, install the spiral reaction pipe in the protective shell, have the first cooling pipe and the second cooling pipe on the spiral reaction pipe and wind, the middle of spiral reaction pipe is equipped with a plurality of radiating fins, and the first cooling pipe and the second cooling pipe are arranged on the both sides of radiating fin respectively, and the both sides of protective shell are installed with first radiating mechanism and second radiating mechanism respectively, the utility model discloses through winding first cooling pipe and second cooling pipe on spiral reaction pipe and carrying out radiating treatment, and through the water flow of flowing, heat is discharged, through the radiating fin, the first cooling pipe and the second cooling pipe on both sides are isolated, prevent the airflow disorder inside protective shell, the setting of first radiating mechanism and second radiating mechanism, improve the radiating efficiency.

Description

Technical Field

[0001] This utility model relates to the field of tubular reactor technology, and in particular to a high heat transfer tubular reactor structure for gas-phase fluorination reaction. Background Technology

[0002] Gas-phase fluorination is an important organic synthesis method with wide applications in chemical synthesis and materials preparation. It involves introducing fluorine atoms into organic molecules to form carbon-fluorine bonds. Fluorination is sometimes also called alkylation, a type of alkylation reaction. In gas-phase fluorination, the catalyst accelerates the reaction rate and improves selectivity, thereby obtaining the target product.

[0003] Tubular reactors are a type of plug flow reactor. These reactors can be very long, and they have low backmixing, resulting in high volumetric efficiency (production capacity per unit volume). They are particularly suitable for applications requiring high conversion rates or with cascaded side reactions.

[0004] A tubular reactor is a continuous-operation reactor with a large length-to-diameter ratio, resembling a tube. These reactors can be very long; for example, the tube length of a propylene dimerization reactor can be measured in kilometers. The reactor structure can be a single tube or multiple tubes connected in parallel; it can be an empty tube, such as a tubular cracking furnace, or a packed tube filled with granular catalyst for multiphase catalytic reactions, such as a tubular fixed-bed reactor. Typically, when the reactant stream is in a turbulent state, the length-to-diameter ratio of the empty tube is greater than 50; the ratio of the length of the packed section to the particle size is greater than 100 (gas) or 200 (liquid), and the material flow can be approximated as plug flow.

[0005] However, existing tubular reactors have poor thermal conductivity of wall materials and unreasonable internal flow channel design, resulting in insufficient heat transfer, easy fluctuation of reaction temperature, and affecting the selectivity of fluorination reaction and product quality. There is also a mismatch between gas flow velocity and heat conduction path in the reactor. The lack of an efficient cooling system or dynamic temperature regulation mechanism makes it difficult to remove the large amount of heat generated during the reaction in time, resulting in excessively high reactor wall temperature and potential safety hazards. Utility Model Content

[0006] To address the shortcomings of existing technologies, this invention provides a high heat transfer tubular reactor structure for gas-phase fluorination reactions.

[0007] The purpose of this utility model is achieved as follows: a high heat transfer tubular reactor structure for gas-phase fluorination reaction includes a protective shell, a spiral reaction tube fixedly installed inside the protective shell, a first cooling tube and a second cooling tube wound around the spiral reaction tube, a plurality of heat dissipation fins fixedly provided in the middle of the spiral reaction tube, the first cooling tube and the second cooling tube respectively arranged on both sides of the heat dissipation fins, and a first heat dissipation mechanism and a second heat dissipation mechanism fixedly installed on both sides of the protective shell.

[0008] Furthermore, the two ends of the spiral reaction tube are respectively connected to a feed pipe and a discharge pipe, and the two ends of the protective shell are respectively fixedly installed with side cover plates, with the feed pipe and the discharge pipe passing through the side cover plates on both sides.

[0009] Furthermore, the first cooling pipe is connected to a first water inlet pipe and a first water outlet pipe at both ends, and the second cooling pipe is connected to a second water inlet pipe and a second water outlet pipe at both ends, with the first water inlet pipe, the first water outlet pipe, the second water inlet pipe, and the second water outlet pipe all penetrating the protective housing.

[0010] Furthermore, the ends of the feed pipe, the discharge pipe, the first water inlet pipe, the first drain pipe, the second water inlet pipe, and the second drain pipe are respectively welded with connecting flanges.

[0011] Furthermore, a first partition plate is installed on the upper end face of the protective shell, and a second partition plate is installed on the lower end face of the protective shell.

[0012] Furthermore, both the first heat dissipation mechanism and the second heat dissipation mechanism include a heat dissipation shell fixedly connected to the protective shell, and a third partition plate is fixedly provided at the end of the heat dissipation shell.

[0013] Furthermore, a servo motor is fixedly installed inside the heat dissipation housing via four claw wings, and the output end of the servo motor is key-connected to fan blades.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] In use, this utility model achieves heat dissipation by winding a first cooling pipe and a second cooling pipe around the spiral reaction tube, which effectively absorbs the heat on the spiral reaction tube and then discharges the heat through flowing water, thus effectively achieving heat dissipation of the spiral reaction tube.

[0016] In addition, the first and second cooling pipes on both sides are isolated by heat dissipation fins, and the first and second heat dissipation mechanisms are installed on the protective shells on both sides to assist in the discharge of heat inside the protective shells, effectively distribute the heat dissipation path, and prevent airflow turbulence inside the protective shells.

[0017] Furthermore, by directionally setting the first and second cooling pipes, and in conjunction with the setting of the first and second partition plates, as well as the setting of the first and second heat dissipation mechanisms, the heat dissipation efficiency can be effectively improved, the large amount of heat energy generated during the reaction process can be removed in time, and the reactor wall temperature can be prevented from becoming too high. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of 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 embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0019] Figure 1 This is a side view of the structure of this utility model.

[0020] Figure 2 This is a schematic diagram of the structure of this utility model from a bottom view.

[0021] Figure 3 This is a schematic diagram of the internal structure of this utility model.

[0022] Figure 4 This is a partial structural diagram of the internal structure of this utility model.

[0023] In the diagram: 1. Protective shell; 2. Side cover plate; 3. Feed pipe; 4. Discharge pipe; 5. First heat dissipation mechanism; 6. Second heat dissipation mechanism; 7. Coiling reaction tube; 8. First cooling pipe; 9. First water inlet pipe; 10. First drain pipe; 11. Second cooling pipe; 12. Second water inlet pipe; 13. Second drain pipe; 14. Heat dissipation fins; 15. Four-claw fins; 16. Servo motor; 17. Fan blades; 18. First partition plate; 19. Second partition plate; 20. Heat dissipation shell; 21. Third partition plate; 22. Connecting flange. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] like Figure 1-4 The structure of a high heat transfer tubular reactor for gas-phase fluorination reaction shown includes a protective shell 1. A spiral reaction tube 7 is fixedly installed inside the protective shell 1. A first cooling tube 8 and a second cooling tube 11 are wound around the spiral reaction tube 7. Several heat dissipation fins 14 are fixedly provided in the middle of the spiral reaction tube 7. The first cooling tube 8 and the second cooling tube 11 are respectively arranged on both sides of the heat dissipation fins 14. A first heat dissipation mechanism 5 and a second heat dissipation mechanism 6 are fixedly installed on both sides of the protective shell 1.

[0026] In this embodiment, preferably, the two ends of the spiral reaction tube 7 are respectively connected to the feed pipe 3 and the discharge pipe 4, and the two ends of the protective shell 1 are respectively fixedly installed with side cover plates 2, and the feed pipe 3 and the discharge pipe 4 pass through the side cover plates 2 on both sides respectively.

[0027] It should be noted that the side cover plate 2 is designed to install the protective shell 1, thereby protecting and fixing the spiral reaction tube 7 and maintaining the stability of the spiral reaction tube 7.

[0028] In this embodiment, preferably, the two ends of the first cooling pipe 8 are respectively connected to the first water inlet pipe 9 and the first drain pipe 10, and the two ends of the second cooling pipe 11 are respectively connected to the second water inlet pipe 12 and the second drain pipe 13. The first water inlet pipe 9, the first drain pipe 10, the second water inlet pipe 12 and the second drain pipe 13 respectively penetrate the protective shell 1.

[0029] It should be noted that the first water inlet pipe 9 and the first drain pipe 10, the second water inlet pipe 12 and the second drain pipe 13 of the first cooling pipe 8 and the second cooling pipe 11 are respectively arranged in opposite directions, which facilitates the heat dissipation of the swirling reaction pipe 7 and can effectively set the airflow direction of heat, thereby improving the heat dissipation efficiency. In addition, the first water inlet pipe 9, the first drain pipe 10, the second water inlet pipe 12 and the second drain pipe 13 respectively penetrate the protective shell 1, which facilitates the installation stability of the first cooling pipe 8 and the second cooling pipe 11.

[0030] In this embodiment, preferably, the ends of the feed pipe 3, the discharge pipe 4, the first water inlet pipe 9, the first drain pipe 10, the second water inlet pipe 12, and the second drain pipe 13 are respectively welded with connecting flanges 22;

[0031] It should be noted that the connection flange 22 is designed to facilitate the installation and connection of the feed pipe 3, discharge pipe 4, first water inlet pipe 9, first drain pipe 10, second water inlet pipe 12 and second drain pipe 13, thereby improving the sealing performance of the connection.

[0032] In this embodiment, preferably, a first partition plate 18 is installed on the upper end face of the protective shell 1, and a second partition plate 19 is installed on the lower end face of the protective shell 1.

[0033] It should be noted that by setting the first partition plate 18 and the second partition plate 19, external airflow can be drawn into the interior of the protective shell 1 during heat dissipation, thereby achieving heat dissipation.

[0034] In this embodiment, preferably, both the first heat dissipation mechanism 5 and the second heat dissipation mechanism 6 include a heat dissipation shell 20 fixedly connected to the protective shell 1, and a third partition plate 21 is fixedly provided at the end of the heat dissipation shell 20.

[0035] It should be noted that the heat sink housing 20 is designed to protect the first heat sink mechanism 5 and the second heat sink mechanism 6, and the third partition plate 21 is designed to prevent debris from entering the interior of the heat sink housing 20.

[0036] In this embodiment, preferably, a servo motor 16 is fixedly installed inside the heat dissipation housing 20 by a four-claw wing 15, and the output end of the servo motor 16 is key-connected to a fan blade 17.

[0037] It should be noted that the four-claw wing 15 is used to fix the servo motor 16, maintain the stability of the servo motor 16, and drive the fan blade 17 to rotate, thereby achieving heat dissipation.

[0038] The specific operational procedures for this application are as follows:

[0039] During use, the feed pipe 3 and discharge pipe 4 are sealed to the pipelines for conveying raw materials and discharging reactants via the connecting flange 22. This also facilitates the sealed connection between the first water inlet pipe 9, the first drain pipe 10, the second water inlet pipe 12, and the second drain pipe 13 and the circulating cooling water, enabling heat dissipation from the swirling reaction tube 7. The raw material is then fed into the swirling reaction tube 7. During the reaction, the swirling reaction tube 7 releases a large amount of heat, which is dissipated through the first cooling pipe 8 and the second cooling pipe 11. The cooling air and water in the first cooling pipe 8 and the second cooling pipe 11 travel in opposite directions, effectively improving the heat dissipation effect. The antibacterial agent is divided by the heat dissipation fins 14 into the first cooling pipe 8, the second cooling pipe 11, the first heat dissipation mechanism 5, and the second heat dissipation mechanism 6, forming a segmented heat dissipation system to prevent heat disturbance and low heat dissipation efficiency. While heat is being dissipated through the first cooling pipe 8 and the second cooling pipe 11, the servo motor 16 in the first heat dissipation mechanism 5 and the second heat dissipation mechanism 6 drives the fan blades 17 to rotate, achieving direct airflow and further improving heat dissipation efficiency.

[0040] The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A high-heat-transfer tubular reactor structure for gas-phase fluorination reactions, characterized in that: The device includes a protective housing (1), inside which a spiral reaction tube (7) is fixedly installed. A first cooling tube (8) and a second cooling tube (11) are wound around the spiral reaction tube (7). Several heat dissipation fins (14) are fixedly provided in the middle of the spiral reaction tube (7). The first cooling tube (8) and the second cooling tube (11) are respectively arranged on both sides of the heat dissipation fins (14). A first heat dissipation mechanism (5) and a second heat dissipation mechanism (6) are fixedly installed on both sides of the protective housing (1).

2. The high heat transfer tubular reactor structure for gas-phase fluorination reaction according to claim 1, characterized in that: The two ends of the spiral reaction tube (7) are respectively connected to the feed pipe (3) and the discharge pipe (4). The two ends of the protective shell (1) are respectively fixedly installed with side cover plates (2). The feed pipe (3) and the discharge pipe (4) pass through the side cover plates (2) on both sides respectively.

3. The high heat transfer tubular reactor structure for gas-phase fluorination reaction according to claim 2, characterized in that: The first cooling pipe (8) is connected to the first water inlet pipe (9) and the first drain pipe (10) at both ends, and the second cooling pipe (11) is connected to the second water inlet pipe (12) and the second drain pipe (13) at both ends. The first water inlet pipe (9), the first drain pipe (10), the second water inlet pipe (12) and the second drain pipe (13) pass through the protective shell (1).

4. The high heat transfer tubular reactor structure for gas-phase fluorination reaction according to claim 3, characterized in that: The ends of the feed pipe (3), the discharge pipe (4), the first water inlet pipe (9), the first drain pipe (10), the second water inlet pipe (12), and the second drain pipe (13) are respectively welded with connecting flanges (22).

5. The high heat transfer tubular reactor structure for gas-phase fluorination reaction according to claim 1, characterized in that: The upper end face of the protective shell (1) is equipped with a first partition plate (18), and the lower end face of the protective shell (1) is equipped with a second partition plate (19).

6. The high heat transfer tubular reactor structure for gas-phase fluorination reaction according to claim 1, characterized in that: Both the first heat dissipation mechanism (5) and the second heat dissipation mechanism (6) include a heat dissipation shell (20) fixedly connected to the protective shell (1), and a third partition plate (21) is fixedly provided at the end of the heat dissipation shell (20).

7. The high heat transfer tubular reactor structure for gas-phase fluorination reaction according to claim 6, characterized in that: The heat dissipation housing (20) is equipped with a servo motor (16) fixedly mounted inside by a four-claw wing (15), and the output end of the servo motor (16) is key-connected to a fan blade (17).

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