A u-tube reactor

Abstract

The utility model provides a kind of U-shaped tube reactor, including base, the top of base is fixedly installed with four installation vertical pole, the two sides of installation vertical pole are evenly provided with three straight pipes, the left side of straight pipe is provided with horizontal U-shaped bend pipe, the left side of rear straight pipe is provided with first connecting pipe.The setting straight pipe, discharge bend pipe, vertical U-shaped bend pipe, feeding bend pipe, first connecting pipe, horizontal U-shaped bend pipe and the setting of second connecting pipe are used to realize the conveying of raw materials, while realizing the reaction of raw materials, the vertical U-shaped bend pipe and horizontal U-shaped bend pipe are used to realize the connection between straight pipes, to realize the conveying of raw materials, while realizing the reaction of raw materials, while the device is spliced by straight pipe, discharge bend pipe, vertical U-shaped bend pipe, feeding bend pipe, first connecting pipe, horizontal U-shaped bend pipe and second connecting pipe, to realize its replacement when single component is damaged, to avoid the influence of subsequent use when overall corrosion.

Description

Technical Field

[0001] This utility model relates to the field of tubular reactor technology, specifically to a U-shaped tubular reactor. Background Technology

[0002] A tubular reactor is a continuous-operation reactor with a large length-to-diameter ratio. It belongs to the plug flow reactor category. This type of reactor can be very long, such as the reactor tube for propylene dimerization, which is measured in kilometers. Tubular reactors have low backmixing and therefore high volumetric efficiency (production capacity per unit volume). They are particularly suitable for applications requiring high conversion rates or with series side reactions.

[0003] U-tube reactors are widely used reaction equipment in various fields such as chemical, food, and pharmaceutical industries. Their unique U-shaped structure design gives them many advantages; however, in actual use, the following problems exist: tube sheet leakage caused by corrosion of the weld seam on the back of the U-tube; damage caused by stress corrosion at the bends of the heat exchange tubes; and corrosion at the end of the extended thermometer sleeve, which in turn affects subsequent use and fails to meet actual application requirements. Utility Model Content

[0004] This invention aims to solve the problems mentioned in the background art by providing a U-shaped tubular reactor.

[0005] The specific technical solution is as follows:

[0006] A U-shaped tubular reactor includes a base with four mounting rods fixedly installed on the top. Three straight pipes are provided on both sides of each mounting rod. A horizontal U-shaped bend is provided on the left side of each straight pipe. A first connecting pipe is provided on the left side of the rear straight pipe, and a second connecting pipe is provided on the left side of the front straight pipe. Two vertical U-shaped bends are provided on the right side of each straight pipe. A discharge bend is provided on the right side of the bottom of the front straight pipe, and a feeding bend is connected to the right side of the upper rear straight pipe.

[0007] As a preferred embodiment of this utility model, a connecting flange is fixedly installed on one side of each of the straight pipe, the discharge bend, the vertical U-shaped bend, the feeding bend, the first connecting pipe, the horizontal U-shaped bend, and the second connecting pipe. Bolts are inserted inside the connecting flanges, and a high-temperature resistant sealing ring is provided between the two connecting flanges.

[0008] As a preferred embodiment of this utility model, a heater is sleeved on the outside of the straight pipe, and a first connector is embedded on one side of the heater.

[0009] In a preferred embodiment of the present invention, a second connector is inserted into the inside of the first connecting tube, the second connector extends into the inside of the first connecting tube, and a temperature sensor is embedded in the top of the second connector.

[0010] As a preferred embodiment of this utility model, a spiral guide plate is fixedly installed inside the second connecting pipe, and a disintegrating rod is fixedly installed inside the second connecting pipe and on one side of the spiral guide plate.

[0011] As a preferred embodiment of this utility model, the mounting vertical rod has a through cavity inside, and the straight tube is fitted with a connecting stirrup on the outside. The connecting stirrup passes through the through cavity and is fixedly connected to the mounting vertical rod by a nut.

[0012] As a preferred embodiment of this utility model, a high-temperature resistant sealing ring is provided between two adjacent connecting flanges.

[0013] This utility model has the following beneficial effects:

[0014] 1. Modular splicing design, low maintenance cost

[0015] The reactor's core piping (straight pipes, bends, connecting pipes, etc.) is modularly assembled using connecting flanges and bolts. The high-temperature resistant sealing rings between adjacent flanges ensure a leak-free seal. When a single component is damaged due to corrosion or wear, the entire unit can be replaced simply by unscrewing the bolts of the corresponding flange, without disassembling the entire unit. This avoids the entire reactor from shutting down due to a localized failure, significantly reducing maintenance difficulty and costs. It is especially suitable for reaction scenarios involving long-term contact with corrosive raw materials.

[0016] 2. High reaction efficiency and thorough mixing of raw materials.

[0017] The spiral guide vane and the dispersing rod inside the second connecting tube form a highly efficient mixing structure. The spiral guide vane guides the fluid to rotate and flow, increasing the contact area of ​​the raw materials. The dispersing rod further disperses the rotating fluid, breaking up the stratification of the raw materials and achieving uniform mixing of different raw materials, providing a good material basis for subsequent reactions. At the same time, the U-shaped flow channel composed of multiple straight and curved tubes extends the residence time of the raw materials. Combined with the precise heating of the straight tubes by the heater, it can ensure that the reaction proceeds fully and improve the product conversion rate.

[0018] 3. Temperature is controllable, and the reaction is highly stable.

[0019] The heater on the outside of the straight tube is powered through the first connector. The heating power can be adjusted according to the reaction requirements to precisely control the reaction temperature of the raw materials in the straight tube. The temperature sensor in the first connecting tube (in conjunction with the second connector) can monitor the fluid temperature in the tube in real time, which makes it easy for operators to adjust the heating parameters in a timely manner, avoid the reaction effect or the generation of by-products due to temperature fluctuations, and ensure that the reaction process is stable and controllable.

[0020] 4. Sturdy structure and strong installation adaptability

[0021] The installation of vertical rods and connecting stirrups works together to firmly fix the straight pipe above the base: after the connecting stirrups are fitted onto the straight pipe, they pass through the cavity of the installation of vertical rods and are tightened with nuts. The fixing point can be flexibly adjusted according to the position of the straight pipe to ensure the overall stability of the pipeline and resist pipeline displacement caused by the impact of raw material flow or external vibration. In addition, the modular structure allows the number of straight pipes and bends to be adjusted according to the reaction scale, adapting to different production capacity requirements and offering high flexibility.

[0022] 5. Excellent sealing performance and high safety.

[0023] Two sealing designs ensure safe use: First, the high-temperature resistant sealing ring between adjacent connecting flanges can effectively prevent leakage of raw materials or products under high temperature and high pressure reaction environments, avoiding safety hazards; second, each pipeline is rigidly connected by flanges and bolts, and with a stable installation structure, the risk of pipeline loosening and leakage is further reduced, which is especially suitable for reaction scenarios involving flammable, explosive or toxic and harmful raw materials, and improves operational safety. Attached Figure Description

[0024] Figure 1 A schematic diagram of the structure of the U-shaped tubular reactor provided in this embodiment of the utility model;

[0025] Figure 2 A schematic diagram of the base structure of the U-shaped tubular reactor provided in an embodiment of this utility model;

[0026] Figure 3 A schematic diagram of the straight tube structure of the U-shaped tubular reactor provided in this embodiment of the utility model;

[0027] Figure 4 A schematic diagram of the horizontal U-shaped bend structure of the U-shaped tubular reactor provided in this embodiment of the utility model;

[0028] Figure 5 A schematic diagram of the vertical U-shaped bend structure of the U-shaped tubular reactor provided in this embodiment of the utility model;

[0029] Figure 6 A schematic diagram of the first connecting pipe structure of the U-shaped tubular reactor provided in this embodiment of the utility model;

[0030] Figure 7 A schematic diagram of the second connecting pipe structure of the U-shaped tubular reactor provided in this embodiment of the utility model;

[0031] Figure 8 A schematic diagram of the interface structure of the second connecting pipe of the U-shaped tubular reactor provided in this embodiment of the present invention.

[0032] In the attached diagram: 1. Base; 2. Heater; 3. Straight pipe; 4. Discharge bend; 5. Vertical U-shaped bend; 6. Feeding bend; 7. Mounting rod; 8. First connecting pipe; 9. Horizontal U-shaped bend; 10. Second connecting pipe; 11. Through cavity; 12. Connecting flange; 13. First joint; 14. Connecting stirrup; 15. Bolt; 16. Second joint; 17. Dispersing rod; 18. Spiral guide plate; 19. Temperature sensor. Detailed Implementation

[0033] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0034] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual images. They should not be construed as limiting the scope of this patent. To better illustrate the embodiments of this utility model, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0035] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0036] In the description of this utility model, unless otherwise explicitly specified and limited, the term "connection" or similar designation indicating the connection relationship between components should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0037] Example

[0038] The U-shaped tubular reactor provided in this embodiment, such as Figures 1-8As shown, the system includes a base 1, with four mounting rods 7 fixedly installed on the top of the base 1. Three straight pipes 3 are installed on both sides of each mounting rod 7. A horizontal U-shaped bend 9 is installed on the left side of each straight pipe 3. A first connecting pipe 8 is installed on the left side of the rear straight pipe 3, and a second connecting pipe 10 is installed on the left side of the front straight pipe 3. Two vertical U-shaped bends 5 are installed on the right side of each straight pipe 3. A discharge bend 4 is installed on the right side of the bottom of the front straight pipe 3, and a feeding bend 6 is connected to the right side of the upper rear straight pipe 3. The system includes straight pipes 3, discharge bends 4, vertical U-shaped bends 5, feeding bends 6, and first connecting pipes 8. The horizontal U-shaped bend 9 and the second connecting pipe 10 are used to transport and react the raw materials. The vertical U-shaped bend 5 and the horizontal U-shaped bend 9 are used to connect the straight pipe 3, thereby transporting and reacting the raw materials. The device is spliced ​​together by the straight pipe 3, the discharge bend 4, the vertical U-shaped bend 5, the feeding bend 6, the first connecting pipe 8, the horizontal U-shaped bend 9 and the second connecting pipe 10, so that when a single component is damaged, it can be replaced, thereby avoiding the impact of overall corrosion on subsequent use.

[0039] A connecting flange 12 is fixedly installed on one side of each of the straight pipe 3, the discharge bend 4, the vertical U-shaped bend 5, the feeding bend 6, the first connecting pipe 8, the horizontal U-shaped bend 9, and the second connecting pipe 10. Bolts 15 are inserted inside the connecting flanges 12, and a high-temperature resistant sealing ring is provided between the two connecting flanges 12. The connecting flanges 12 and bolts 15 connect the straight pipe 3, the discharge bend 4, the vertical U-shaped bend 5, the feeding bend 6, the first connecting pipe 8, the horizontal U-shaped bend 9, and the second connecting pipe 10. In actual use, if the straight pipe 3, the discharge bend 4, the vertical U-shaped bend 5, the feeding bend 6, the first connecting pipe 8, the horizontal U-shaped bend 9, and the second connecting pipe 10 are damaged, the individual components can be disassembled and replaced by using the bolts 15 and the connecting flanges 12.

[0040] A heater 2 is sleeved on the outside of the straight pipe 3, and a first connector 13 is embedded on one side of the heater 2. The heater 2 is used to heat the straight pipe 3, and the first connector 13 is used to supply power to the heater 2.

[0041] A second connector 16 is inserted into the interior of the first connecting pipe 8, extending through the interior of the first connecting pipe 8. A temperature sensor 19 is embedded in the top of the second connector 16. The second connector 16 is used to monitor the fluid temperature inside the pipe. The temperature sensor 19 is a SIN-WZP-PT100. The temperature sensor 19 and the heater 2 are electrically connected to the controller, which can be a Siemens S7-1200 PLC. It has 4 analog inputs (adapting to temperature, pressure, and flow sensor signals) and 2 analog outputs (controlling heater power and regulating valve opening). It supports industrial Ethernet communication to meet the real-time calculation requirements of reactor parameters. Temperature closed-loop control: when the temperature sensor detection value is lower than the set reaction temperature (e.g., 150℃), the PLC output signal increases the power of the heater 2; when it is higher than the set value, the power is reduced, with a control accuracy of ±2℃, to avoid side reactions caused by temperature fluctuations.

[0042] A spiral guide plate 18 is fixedly installed inside the second connecting pipe 10. A dispersing rod 17 is fixedly installed inside the second connecting pipe 10 and on one side of the spiral guide plate 18. The spiral guide plate 18 is used to guide the fluid flowing inside the second connecting pipe 10 to rotate it. The dispersing rod 17 is used to disperse the rotating fluid, thereby mixing the fluid to facilitate subsequent reactions.

[0043] The mounting rod 7 has a through cavity 11 inside, and the straight tube 3 is fitted with a connecting hoop 14 on the outside. The connecting hoop 14 passes through the through cavity 11 and is fixedly connected to the mounting rod 7 with a nut. The through cavity 11 and the connecting hoop 14 are used to fix the straight tube 3 to the outside of the mounting rod 7, thereby achieving overall installation and fixation.

[0044] A high-temperature resistant rubber sealing ring is provided between two adjacent connecting flanges 12 to increase the connection stability between the connecting flanges 12.

[0045] Working principle:

[0046] 1. Assembly and initial fixation

[0047] First, the reactor structure is assembled and fixed: the straight pipe 3 is connected to the mounting rod 7 via connecting stirrups 14. After the connecting stirrups 14 are fitted onto the straight pipe 3, they pass through the through cavity 11 of the mounting rod 7 and are tightened with nuts to ensure that the straight pipe 3 is stably arranged above the base 1. Then, the various pipelines are spliced ​​using connecting flanges 12 and bolts 15: the three straight pipes 3 on the same side are connected by vertical U-shaped bends 5, and the corresponding straight pipes 3 on both sides are connected by horizontal U-shaped bends 9. Simultaneously, the first connecting pipe 8 and the second connecting pipe 10 are respectively connected to the left side of the rear and front straight pipes 3, the feeding bend 6 is connected to the right side of the rear upper straight pipe 3, and the discharge bend 4 is connected to the bottom right side of the front straight pipe 3. During splicing, a high-temperature resistant sealing ring is placed between adjacent connecting flanges 12, and the bolts 15 are tightened to achieve a seal, preventing leakage of raw materials or products during the reaction process.

[0048] 2. Raw material feeding and premixing

[0049] At the start of the reaction, the reactants are injected into the reactor through the feed bend 6, first entering the straight pipe 3 at the rear and flowing downwards along it. When the reactants reach the horizontal U-shaped bend 9 on the left, they are guided to the front straight pipe 3 and then through the second connecting pipe 10. The spiral guide vanes 18 inside the second connecting pipe 10 guide the reactants to rotate and increase the contact area between different reactants. The rotating reactants are then further dispersed by the dispersing rod 17, breaking up the stratification of the reactants and achieving uniform premixing, laying the foundation for a thorough reaction in the future.

[0050] 3. Reaction process and temperature control

[0051] The premixed raw materials enter each set of straight tubes 3. The heaters 2 on the outside of the straight tubes 3 are activated—powered by the first connector 13. The heaters 2 generate heat and transfer it into the straight tubes 3, heating the raw materials to the preset reaction temperature. Simultaneously, a temperature sensor 19 (model SIN-WZP-PT100) embedded in the top of the second connector 16 inside the first connecting pipe 8 monitors the temperature of the raw materials inside the pipe in real time and feeds the data back to the controller. If the temperature deviates from the set value, the controller adjusts the power of the heaters 2 to ensure that the raw materials react at a suitable temperature. The U-shaped flow channel formed by the straight tubes 3 and the bends 5 and 9 extends the residence time of the raw materials in the reactor, allowing the reaction to proceed fully and reducing unreacted raw material residue.

[0052] 4. Product discharge and collection

[0053] After the reaction is complete, the generated product continues to flow downwards along the front straight pipe 3, and is finally discharged from the reactor through the discharge bend 4 on the right side of the bottom of the front straight pipe 3, entering the subsequent separation and purification processes. If continuous reaction is required, raw materials can be continuously replenished through the feeding bend 6, and the product can be continuously discharged from the discharge bend 4, realizing continuous production.

[0054] 5. Equipment maintenance and component replacement

[0055] After long-term use, if a certain pipeline, such as straight pipe 3 or bend pipe 5, is damaged due to corrosion or wear, or leaks due to aging of the high-temperature resistant sealing ring, it can be maintained separately: unscrew the bolts 15 of the flanges 12 at both ends of the damaged part, remove the damaged part and the old sealing ring, replace the new part and the sealing ring, and then tighten the bolts 15 to restore use. There is no need to disassemble the entire reactor, which greatly shortens the maintenance time and reduces the impact on production.

[0056] The entire process, through a continuous flow of "assembly and fixation - feeding and mixing - temperature-controlled reaction - product discharge - maintenance and replacement", achieves efficient reaction and continuous production of raw materials, while also taking into account ease of operation and flexibility of maintenance.

[0057] The above are merely preferred embodiments of the present utility model and are not intended to limit the implementation methods and protection scope of the present utility model. Those skilled in the art should realize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A U-shaped tubular reactor, characterized in that, Includes a base (1), on which four mounting rods (7) are fixedly installed. Three straight pipes (3) are provided on both sides of the mounting rods (7). A horizontal U-shaped bend (9) is provided on the left side of the straight pipe (3). A first connecting pipe (8) is provided on the left side of the rear straight pipe (3). A second connecting pipe (10) is provided on the left side of the front straight pipe (3). Two vertical U-shaped bends (5) are provided on the right side of the straight pipe (3). A discharge bend (4) is provided on the right side of the bottom of the front straight pipe (3). A feeding bend (6) is connected to the right side of the rear upper straight pipe (3).

2. The U-shaped tubular reactor according to claim 1, characterized in that, A connecting flange (12) is fixedly installed on one side of the straight pipe (3), the discharge bend (4), the vertical U-shaped bend (5), the feeding bend (6), the first connecting pipe (8), the horizontal U-shaped bend (9), and the second connecting pipe (10). Bolts (15) are inserted inside the connecting flange (12), and a high-temperature resistant sealing ring is provided between the two connecting flanges (12).

3. The U-shaped tubular reactor according to claim 1, characterized in that, A heater (2) is fitted on the outside of the straight pipe (3), and a first connector (13) is embedded on one side of the heater (2).

4. The U-shaped tubular reactor according to claim 1, characterized in that, A second connector (16) is inserted into the inside of the first connecting tube (8). The second connector (16) extends through the inside of the first connecting tube (8), and a temperature sensor (19) is embedded at the top of the second connector (16).

5. The U-shaped tubular reactor according to claim 1, characterized in that, A spiral guide plate (18) is fixedly installed inside the second connecting pipe (10), and a disintegrating rod (17) is fixedly installed inside the second connecting pipe (10) and on one side of the spiral guide plate (18).

6. The U-shaped tubular reactor according to claim 1, characterized in that, The mounting rod (7) has a through cavity (11) inside, and the straight tube (3) is fitted with a connecting stirrup (14) on the outside. The connecting stirrup (14) passes through the through cavity (11) and is fixedly connected to the mounting rod (7) by a nut.

7. The U-shaped tubular reactor according to claim 2, characterized in that, A high-temperature resistant sealing ring is provided between two adjacent connecting flanges (12).

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