Reaction kettle for producing surfactant

Abstract

The utility model belongs to the field of chemical machinery, and particularly relates to a reaction kettle for producing a surfactant. The utility model provides a reaction kettle for producing a surfactant, which comprises a kettle body, a tensioning rib is arranged outside the kettle body, the tensioning rib is connected with the kettle body in a hooping manner, the tensioning rib is wound on the outer side of the kettle body for multiple circles along the height of the kettle body, the tensioning rib is used for generating pre-compressive stress on the surface of the kettle body, and when the kettle body is in a high-pressure state, the tensioning rib is connected with the kettle body in a hooping manner. Under the same kettle body thickness, compared with a common high-pressure reaction kettle, the high-pressure reaction kettle with the tensioning rib has the advantages that the tensioning rib is wound on the whole surface of the kettle body, the tensioning rib can generate tension to tightly hoop the outer part of the kettle body, and a pressure opposite to the pressure in the kettle is applied to the kettle body, so that the pressure on the kettle body is reduced, and the service life of the kettle body is prolonged.

Description

Technical Field

[0001] This utility model belongs to the field of chemical machinery, and in particular relates to a reaction vessel for surfactant production. Background Technology

[0002] Depending on the specific synthesis method and surfactant type, surfactant preparation techniques in reactors can be categorized into physical synthesis and chemical synthesis, with significantly different pressure requirements. Whether a high-pressure environment is needed depends on the surfactant type: anionic surfactants (such as sodium dodecylbenzenesulfonate) generally do not require high pressure, while some cationic or special types may require high-pressure assistance; physical synthesis methods (such as high-compression synthesis) and special chemical reactions (such as the hydrogenation of fatty alcohols) require high pressure. Synthetic processes requiring high pressure include the condensation of low molecular weight alkyl esters with hydrophilic amino alcohols or hydroxylated fatty alcohols under high pressure to form surfactants, with reaction conditions of 300-700 MPa for several hours to tens of hours; and the high-pressure hydrogenation of fatty alcohols, where fatty alcohols (such as dodecyl alcohol) are used as raw materials for surfactants, requiring high-pressure hydrogenation reactions at pressures reaching hundreds of MPa. High-pressure reactors are necessary for the efficient preparation of specific high-purity surfactants (such as high-compression products).

[0003] Existing patent CN204779424U discloses a production equipment for perfluoroalkoxycarboxylic acid surfactants. Its features include: a nitrogen cylinder and a hexafluoropropylene oxide cylinder connected in parallel to a stage I drying tower; the stage I drying tower is connected to a stage II drying tower; the stage II drying tower is connected to a high-pressure reactor; the high-pressure reactor is connected to an acyl fluoride hydrolysis reaction separation vessel; a buffer tank and a solvent storage tank are installed between the high-pressure reactor and the acyl fluoride hydrolysis reaction separation vessel; the buffer tank is connected to a vacuum pump; the acyl fluoride hydrolysis reaction separation vessel is connected to a first reaction vessel; and the first reaction vessel is connected to a second reaction vessel. This invention provides a simple and efficient production equipment for perfluoroalkoxycarboxylic acid surfactants, with few side reactions and high yield of perfluoroalkoxycarboxylic acid surfactants throughout the production process. The same equipment can produce multiple products. In order to withstand greater pressure during the reaction process, the thickness of the reactor body is increased. However, the increased thickness of the reactor body reduces the reaction space, which reduces the amount of reactants that can be added each time, resulting in less reaction products and lowering the production efficiency of the reaction. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned technical problems by providing a reaction vessel for surfactant production. This reaction vessel can withstand higher pressures while having a thinner vessel body, increasing the reaction space and improving the production efficiency of the reaction.

[0005] In view of this, the present invention provides a reaction vessel for surfactant production, characterized in that it includes a vessel body, and a tensioning rib is provided on the outside of the vessel body. The tensioning rib is tightly connected to the vessel body, and the tensioning rib is wound around the outside of the vessel body multiple times along the height of the vessel body. The tensioning rib is used to generate pre-compression stress on the surface of the vessel body.

[0006] In this technical solution, when the reactor body is under high pressure, under the same reactor body thickness, compared with ordinary high-pressure reactors, the high-pressure reactor with tension ribs has tension ribs wrapped around the entire surface of the reactor body. The tension ribs generate tension to tighten the outside of the reactor body and apply a pressure opposite to the internal pressure, thereby reducing the pressure on the reactor body and extending the service life of the reactor body.

[0007] Furthermore, the tensioning tendon is made of a linear material with good fatigue life.

[0008] In this technical solution, the tensioning bar is generally made of steel wire with a tensile strength greater than 3500MPa, a single wire diameter less than 0.3mm, and a carbon content greater than 0.7%.

[0009] Furthermore, a protective shell is provided on the outside of the vessel body. The protective shell is fixedly connected to the outside of the vessel body, and a cavity is formed between the protective shell and the vessel body. The protective shell is used to prevent the tensioning rib from contacting the air.

[0010] In this technical solution, a cavity is formed between the protective shell and the vessel body. The tensioning rib is placed in the cavity, which can effectively prevent the tensioning rib from contacting the air, solve the problem of the tensioning rib being exposed to the air and corroding, and extend the service life of the tensioning rib.

[0011] Furthermore, the chamber is filled with fluid, which applies pressure to the outside of the vessel.

[0012] In this technical solution, the fluid used is a common oil, such as lubricating oil, which will not corrode the tensioning ribs, while applying pressure to the surface of the vessel.

[0013] Furthermore, a liquid supply device is provided on the outside of the protective shell, which is used to supply fluid to the chamber and regulate the pressure of the fluid.

[0014] Furthermore, the liquid supply device includes:

[0015] A pressure regulating valve, which is used to adjust the pressure in the chamber by controlling the inflow or outflow of fluid;

[0016] A regulating pump is used to pump fluid into or out of the chamber.

[0017] In the technical solution, the pressure in the chamber is adjusted by controlling the fluid through a pressure regulating valve to adapt to the different pressures of different reactants in the high-pressure reactor. By regulating the pump, fluid can be pumped into the chamber to increase the fluid pressure inside the chamber. This can apply a pressure to the outside of the reactor that is opposite to the pressure inside the reactor, thereby reducing the pressure on the reactor and preventing the reactor from cracking under high pressure.

[0018] Furthermore, the protective shell is equipped with a detection device for detecting pressure fluctuations within the chamber. The detection device is equipped with a pressure gauge for receiving pressure fluctuations within the chamber.

[0019] In this technical solution, the pressure gauge visually displays the pressure changes within the chamber. The pressure gauge allows for the determination of whether there is a pressure leak inside the vessel, thereby diagnosing whether cracks exist within the vessel. The external pressure of the tensioning rib and the fluid pressure within the chamber are opposite to the internal pressure of the vessel, causing the pressure inside the chamber to be lower than the supply fluid pressure. When cracks exist in the vessel, the pressure inside the chamber will exceed the supply fluid pressure, causing a change in the pressure gauge reading. This allows personnel to quickly determine if the vessel is damaged, shut down the motor, and prevent further safety accidents.

[0020] Furthermore, a lid is provided on the vessel body, and a bracket is fixedly installed on the outside of the vessel body. A lifting device is provided on the bracket. The bracket is used to fix the vessel body, and the lifting device is used to lift the lid along the height direction of the vessel body.

[0021] In this technical solution, when the reactor needs to react, the lifting device controls the lid to descend until it is in contact with the top of the reactor body, making the reactor body a sealed whole; when the reactor needs to be cleaned or parts replaced, the lifting device controls the lid to rise, without the need for manual operation, making the operation simple and convenient.

[0022] Furthermore, a base is provided inside the bracket, and the lifting device is mounted on the base. The lifting device includes:

[0023] A fixing block, which is fixedly mounted on the lid of the vessel;

[0024] A lifting cylinder is mounted on a base and is fixedly connected to the side of a fixed block away from the lid.

[0025] A lifting motor is fixedly mounted on a base, and the output end of the lifting motor is connected to a lifting cylinder via a gearbox;

[0026] A limiting component is provided on the lifting cylinder and is used to limit the lifting displacement of the fixed block.

[0027] In this technical solution, the lifting cylinder is driven by the lifting motor to lift and lower, and the lifting cylinder drives the fixed block to lift and lower, thereby driving the lid of the vessel to lift and lower. The limiting component can limit the displacement of the fixed block to prevent the fixed block from colliding with the vessel body when it descends or from detaching from the support when it rises.

[0028] Furthermore, the limiting component includes:

[0029] A lifting slider is fixedly mounted on a fixed block on the side away from the lid;

[0030] A lifting guide rail is fixedly mounted on a bracket. The bottom end of the lifting guide rail is flush with the top of the vessel body. A guide rail is installed inside the lifting guide rail. Limit blocks are installed at both ends of the guide rail. The guide rail is slidably connected to the lifting slider.

[0031] In this technical solution, the fixing block is fixed on the lifting slider. The fixing block can drive the lifting slider to slide on the lifting guide rail. When the fixing block slides to the position of the limit block, the fixing block cannot move, thereby limiting the displacement of the fixing block.

[0032] Furthermore, the lifting cylinder is an explosion-proof cylinder, and the lifting motor is an explosion-proof motor.

[0033] In this technical solution, the lifting motor is connected to the lifting cylinder through a gearbox to form a mechanically sealed lifting cylinder, which can prevent explosion accidents caused by oil vapor or organic solvents entering the lifting motor and lifting cylinder when cleaning the reactor or replacing parts, thereby improving safety.

[0034] The beneficial effects of this utility model are:

[0035] 1. When the tensioning ribs are installed under tension on the outer edge of the high-pressure reactor, the reactor can withstand greater pressure while the reactor body thickness becomes thinner, increasing the reaction space and improving the production efficiency of the reaction.

[0036] 2. The protective shell in this utility model can prevent the wires from contacting the air, thereby solving the problem caused by corrosion. Furthermore, the liquid supply device and the detection device can quickly diagnose pressure leaks caused by cracks in the pressure vessel, thereby improving safety.

[0037] 3. The lifting device in this utility model can easily raise and lower the lid of the vessel, while preventing oil vapor or organic solvents from entering the motor and cylinder and causing an explosion. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0039] Figure 2 This is a schematic diagram of the vessel structure of this utility model;

[0040] Figure 3 This is a schematic diagram of the structure of the liquid supply device and detection device for the vessel body of this utility model;

[0041] Figure 4 This is a schematic diagram of the internal cross-section of the vessel body of this utility model;

[0042] Figure 5 This is a structural schematic diagram of the lifting device of this utility model.

[0043] Figure 6 This is a schematic diagram of the structure of the sliding guide rail of this utility model;

[0044] In the diagram: 1. Support; 2. Vessel body; 3. Tensioner rib; 4. Safety vessel; 5. Regulating pump; 6. Pressure gauge; 7. Chamber; 8. Fixing block; 9. Lifting cylinder; 10. Lifting motor; 11. Lifting slider; 12. Lifting guide rail; 13. Pressure regulating valve; 14. Base; 15. Vessel lid; 16. Limiting block; 17. Guide rail. Detailed Implementation

[0045] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0046] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0047] It should be noted that the terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and are not limited in number; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0048] It should be noted that in the description of this application, the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms 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, and therefore should not be construed as a limitation on the scope of protection of this application. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0049] It should be noted that, in this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0050] Example 1:

[0051] like Figure 1-2 As shown, this utility model provides a reaction vessel for surfactant production, including a vessel body 2. Tensioning ribs 3 are provided on the outside of the vessel body 2. The tensioning ribs 3 are tightly connected to the vessel body 2. The tensioning ribs 3 are wound around the outside of the vessel body 2 multiple times along the height of the vessel body 2. The tensioning ribs 3 are used to generate pre-compression stress on the surface of the vessel body 2.

[0052] When the vessel body 2 is under high pressure, under the same thickness of the vessel body 2, compared with ordinary high pressure reactors, the high pressure reactor with tension ribs 3 has tension ribs 3 wrapped around the entire surface of the vessel body 2. The tension ribs 3 generate tension to tighten the outside of the vessel body 2, applying a pressure to the vessel body 2 that is opposite to the pressure inside the vessel, thereby reducing the pressure on the vessel body 2 and extending the service life of the vessel body 2.

[0053] The tensioning rib 3 is made of a linear material with good fatigue life.

[0054] The tensioning rib 3 is generally made of steel wire with a strength limit greater than 3500MPa, a single wire diameter less than 0.3mm, and a carbon content greater than 0.7%.

[0055] Example 2:

[0056] like Figure 1-4 As shown, a protective shell is provided on the outside of the vessel body 2. The protective shell is fixedly connected to the outside of the vessel body 2, and a chamber 7 is formed between the protective shell and the vessel body 2. The protective shell is used to prevent the tensioning rib 3 from contacting the air.

[0057] A chamber 7 is formed between the protective shell and the vessel body 2. The tensioning rib 3 is placed in the chamber 7, which can effectively prevent the tensioning rib 3 from contacting the air, solve the problem of the tensioning rib 3 being exposed to the air and corroding, and extend the service life of the tensioning rib 3.

[0058] The chamber 7 is filled with fluid, which applies pressure to the outside of the vessel body 2.

[0059] In this technical solution, the fluid used is a common oil, such as lubricating oil, which will not corrode the tensioning rib 3, while applying pressure to the surface of the vessel body 2.

[0060] The protective shell is equipped with a liquid supply device, which is used to supply fluid to the chamber 7 and regulate the pressure of the fluid.

[0061] Furthermore, the liquid supply device includes:

[0062] Pressure regulating valve 13, which is used to adjust the pressure in chamber 7 by controlling the inflow or outflow of fluid;

[0063] The regulating pump 5 is used to pump fluid into or out of the chamber 7.

[0064] The pressure in chamber 7 is adjusted by controlling the fluid through pressure regulating valve 13 to adapt to the different pressures of different reactants in the high-pressure reactor. Fluid can be pumped into chamber 7 by regulating pump 5 to increase the fluid pressure in chamber 7. A pressure opposite to the pressure inside the reactor can be applied to the outside of the reactor body 2, thereby reducing the pressure on the reactor body 2 and preventing cracks from forming under high pressure.

[0065] The protective shell is equipped with a detection device for detecting pressure fluctuations within the chamber 7. The detection device is equipped with a pressure gauge 6 for receiving pressure fluctuations within the chamber 7.

[0066] Pressure gauge 6 visually displays the pressure changes in chamber 7. By using pressure gauge 6, it's possible to determine if there is a pressure leak inside vessel 2, thus diagnosing whether there are cracks in vessel 2. The external pressure of tension rib 3 and the fluid pressure in chamber 7 are opposite to the internal pressure of vessel 2, causing the pressure inside chamber 7 to be lower than the supply fluid pressure. When there is a crack in vessel 2, the pressure inside chamber 7 will exceed the supply fluid pressure, causing a change in the pressure gauge reading. This allows personnel to quickly determine if vessel 2 is damaged, shut down the motor, and prevent a more serious safety accident.

[0067] Example 3:

[0068] like Figure 5-6 As shown, a lid 15 is provided on the vessel body 2, and a bracket 1 is fixedly provided on the outside of the vessel body 2. A lifting device is provided on the bracket 1. The bracket 1 is used to fix the vessel body 2, and the lifting device is used to lift the lid 15 along the height direction of the vessel body 2.

[0069] When the reactor needs to react, the lifting device controls the lid 15 to descend until it is in contact with the top of the reactor body 2, making the reactor body 2 a sealed whole; when the reactor needs to be cleaned or parts replaced, the lifting device controls the lid 15 to rise, without manual operation, making the operation simple and convenient.

[0070] A base 14 is provided inside the bracket 1, and the lifting device is mounted on the base 14. The lifting device includes:

[0071] Fixing block 8 is fixedly mounted on the lid 15 of the vessel;

[0072] A lifting cylinder 9 is mounted on a base 14 and is fixedly connected to the side of a fixing block 8 away from the lid 15.

[0073] The lifting motor 10 is fixedly mounted on the base 14, and the output end of the lifting motor 10 is connected to the lifting cylinder 9 through a gearbox.

[0074] A limiting component is provided on the lifting cylinder 9, and the limiting component is used to limit the lifting displacement of the fixed block 8.

[0075] The lifting cylinder 9 is driven by the lifting motor 10 to lift and lower. The lifting cylinder 9 drives the fixed block 8 to lift and lower, thereby driving the lid 15 to lift and lower. The limiting component can limit the displacement of the fixed block 8 to prevent the fixed block 8 from falling and colliding with the lid 2 and rising and disengaging from the support 1.

[0076] The limiting component includes:

[0077] The lifting slider 11 is fixedly mounted on the fixing block 8 on the side away from the lid 15;

[0078] A lifting guide rail 12 is fixedly mounted on the bracket 1. The bottom end of the lifting guide rail 12 is flush with the top of the vessel body 2. A guide rail 17 is provided inside the lifting guide rail 12. Limit blocks 16 are provided at both ends of the guide rail 17. The guide rail 17 is slidably connected to the lifting slider 11.

[0079] The fixing block 8 is fixed on the lifting slider 11. The fixing block 8 can drive the lifting slider 11 to slide on the lifting guide rail 12. When the fixing block 8 slides to the position of the limit block 16, the fixing block 8 cannot move, thereby limiting the displacement of the fixing block 8.

[0080] The lifting cylinder 9 is an explosion-proof cylinder, and the lifting motor 10 is an explosion-proof motor.

[0081] The lifting motor 10 is connected to the lifting cylinder 9 via a gearbox to form a mechanically sealed lifting cylinder, which can prevent explosions caused by oil vapor or organic solvents entering the lifting motor 10 and lifting cylinder 9 during reactor cleaning or component replacement, thereby improving safety.

[0082] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A reaction vessel for producing surfactants, characterized in that, Includes a vessel body (2), and a tensioning rib (3) is provided on the outside of the vessel body (2). The tensioning rib (3) is tightly connected to the vessel body (2). The tensioning rib (3) is wrapped around the outside of the vessel body (2) multiple times along the height of the vessel body (2). The tensioning rib (3) is used to generate pre-compression stress on the surface of the vessel body (2).

2. The reaction vessel for surfactant production according to claim 1, characterized in that, The tensioning tendon (3) is made of a linear material with good fatigue life.

3. The reaction vessel for surfactant production according to claim 1, characterized in that, The vessel body (2) is provided with a protective shell, which is fixedly connected to the outside of the vessel body (2). A cavity (7) is formed between the protective shell and the vessel body (2). The protective shell is used to prevent the tensioning rib (3) from contacting the air.

4. The reaction vessel for surfactant production according to claim 3, characterized in that, The chamber (7) contains fluid that applies pressure to the outside of the vessel body (2).

5. The reaction vessel for surfactant production according to claim 3, characterized in that, The protective shell is provided with a liquid supply device, which is used to supply fluid to the chamber (7) and regulate the pressure of the fluid.

6. The reaction vessel for surfactant production according to claim 5, characterized in that, The liquid supply device includes: Pressure regulating valve (13), the pressure regulating valve (13) is used to adjust the pressure in the chamber (7) by controlling the inflow or outflow of fluid; A regulating pump (5) is used to pump fluid into or out of the chamber (7).

7. The reaction vessel for surfactant production according to claim 3, characterized in that, The protective shell is provided with a detection device, which is used to detect pressure fluctuations in the chamber (7). The detection device is provided with a pressure gauge (6), which is used to receive pressure fluctuations in the chamber (7).

8. A reaction vessel for surfactant production according to claim 1, characterized in that, The vessel body (2) is provided with a vessel lid (15), and a bracket (1) is fixedly provided on the outside of the vessel body (2). A lifting device is provided on the bracket (1). The bracket (1) is used to fix the vessel body (2), and the lifting device is used to lift the vessel lid (15) along the height direction of the vessel body (2).

9. A reaction vessel for surfactant production according to claim 8, characterized in that, A base (14) is provided inside the bracket (1), and the lifting device is provided on the base (14). The lifting device includes: A fixing block (8) is fixedly mounted on the lid (15); Lifting cylinder (9) is mounted on base (14) and fixedly connected to the side of fixed block (8) away from the lid (15); A lifting motor (10) is fixedly mounted on a base (14), and the output end of the lifting motor (10) is connected to a lifting cylinder (9) via a gearbox. A limiting component is provided on the lifting cylinder (9) and is used to limit the lifting displacement of the fixed block (8).

10. A reaction vessel for surfactant production according to claim 9, characterized in that, The limiting component includes: The lifting slider (11) is fixedly mounted on the fixing block (8) on the side away from the lid (15); A lifting guide rail (12) is fixedly mounted on a bracket (1). The bottom end of the lifting guide rail (12) is flush with the top of the vessel body (2). A guide rail (17) is provided inside the lifting guide rail (12). Limit blocks (16) are provided at both ends of the guide rail (17). The guide rail (17) is slidably connected to the lifting slider (11).

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