Dynamic mixing tube type continuous flow reactor
The dynamic mixing tubular continuous flow reactor with optimized stirring device design solves the problem of unsatisfactory mixing effect in the existing technology, achieves efficient mixing and uniform distribution, improves reaction efficiency and equipment applicability, and is suitable for chemical, material, environmental, pharmaceutical, food and other fields.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI YUHUA TECHNOLOGY CO LTD
- Filing Date
- 2025-04-30
- Publication Date
- 2026-05-05
AI Technical Summary
Existing continuous flow reactors have shortcomings in mixing performance, especially when dealing with reactants with high viscosity or special properties. The mixing effect is not ideal and it is difficult to meet the requirements of rapid mixing and uniform distribution.
A dynamic mixing tubular continuous flow reactor was designed. By optimizing the stirring device, multiple blades with flow holes on the stirring shaft and staggered arrangement are adopted. Combined with the variable frequency motor to adjust the stirring speed, efficient mixing and uniform distribution of reactants are achieved.
It improves the efficiency of chemical reactions and product quality, enhances the operational flexibility and applicability of equipment, and is suitable for fields such as chemical engineering, materials, environment, pharmaceuticals, and food.
Smart Images
Figure CN224194724U_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of continuous flow technology in chemical reactions, specifically to a dynamic mixing tubular continuous flow reactor. This reactor, through optimized design of the stirring device, achieves efficient mixing and uniform distribution of reactants under continuous flow conditions, thereby improving the efficiency of chemical reactions and product quality. Background Technology
[0002] In modern chemical industry, continuous flow reactor technology has attracted widespread attention due to its advantages such as high efficiency, safety, and ease of control. Compared with traditional batch reactors, continuous flow reactors can achieve continuous supply of reactants and continuous discharge of products, thereby significantly improving production efficiency and reducing the residence time of materials in the reactor, thus lowering the probability of side reactions caused by excessively long residence time. The mixing effect of continuous flow reactors has a crucial impact on the efficiency of chemical reactions and product quality.
[0003] Currently, continuous flow reactors on the market still have many shortcomings in terms of mixing effect. On the one hand, many reactors use static mixing elements for mixing. Although these elements are simple in structure and low in cost, the mixing effect is often unsatisfactory when dealing with reactants with high viscosity or special properties, which can easily lead to uneven distribution of reactants in the reactor and thus affect the progress of chemical reactions. On the other hand, although some reactors use dynamic stirring devices, the design of the stirring blades is often too simple and lacks an effective flow structure, making it difficult for the fluid to form effective eddies and shear forces during stirring, thus affecting the mixing effect.
[0004] Furthermore, with the increasing complexity of chemical reactions, higher demands are being placed on the mixing efficiency of reactors. For example, in some reactions requiring rapid mixing and uniform distribution, traditional continuous flow reactors often fall short of the requirements. Therefore, developing a dynamic mixing tubular continuous flow reactor with high-efficiency mixing is of great significance for promoting the development of continuous flow reaction technology. Utility Model Content
[0005] To address the aforementioned issues, this invention proposes a novel dynamic mixing tubular continuous flow reactor. By optimizing the design of the stirring device, it achieves efficient mixing and uniform distribution of reactants under continuous flow conditions, thereby improving the efficiency of chemical reactions and product quality.
[0006] To achieve the above-mentioned objectives, the present invention adopts the following technical solution:
[0007] A dynamic mixing tubular continuous flow reactor includes a tube body and a stirring device rotatably disposed within the tube body. The upper end of the tube body has at least one upper port for introducing reactants; its lower end has at least one lower port for discharging reaction products. The stirring device includes a stirring shaft extending along the central axis of the tube body, and at least one impeller fixed to the stirring shaft. The impeller has a width extending radially along the stirring shaft and a length extending axially along the stirring shaft, and the impeller has a plurality of flow holes arranged in an array along its length. This design allows the reactants to make more thorough contact with the impeller during flow, enhancing the mixing effect. Simultaneously, the length of the impeller is less than the distance between the upper and lower ports, preventing material from splashing out of the ports.
[0008] Furthermore, a first blade and a second blade may be attached to the stirring shaft. The multiple flow holes on the first and second blades are respectively divided into multiple first hole groups and second hole groups arrayed along the length direction. Along the length direction of the stirring shaft, the first hole groups and second hole groups are staggered with a gap between them. This design further enhances the mixing effect of the materials, making the reaction more uniform.
[0009] Preferably, both the first and second hole groups include a row of open holes disposed along the edge of the blade and at least one row of closed holes disposed inside the blade. The design of the open holes facilitates the flow and mixing of materials, while the closed holes can control the flow direction of materials to a certain extent, thereby achieving more thorough mixing.
[0010] To further improve the mixing effect, the mixing shaft may have multiple blades, and these blades are evenly distributed in the circumferential direction of the mixing shaft to ensure that the material is fully mixed in the tube.
[0011] In terms of manufacturing process, the blades and stirring shaft can be integrally combined by metal casting or welding, which improves the structural strength and stability of the equipment.
[0012] In terms of equipment structure, a positioning seat is fixedly connected to the bottom of the tube, and the stirring shaft is rotatably positioned on the positioning seat via bearings, ensuring stable rotation of the stirring shaft. Simultaneously, the stirring shaft is connected to a variable frequency motor via a coupler, allowing the stirring speed to be adjusted according to actual needs. A gas-liquid separator is integrated into the upper end of the tube, and the gas-liquid separator is configured in a conical shape, wider at the top and narrower at the bottom.
[0013] Furthermore, to enhance the operational flexibility and applicability of the equipment, the lower and upper ends of the pipe body may each have two lower interfaces and two upper interfaces. There is a certain height difference between the two lower interfaces and between the two upper interfaces, and they are staggered along the circumference of the pipe body. This design allows the equipment to select different interfaces for material introduction and discharge according to actual needs, further improving the equipment's operational convenience and applicability.
[0014] Due to the adoption of the above technical solutions, the technical effects of this utility model are as follows:
[0015] This invention relates to a dynamic mixing tubular continuous flow reactor. Through innovative stirring device design and optimized tube structure, it achieves efficient mixing and uniform distribution of reactants, improving reaction efficiency while enhancing operational flexibility and applicability. This invention can be widely applied in chemical, materials, environmental, pharmaceutical, and food industries, providing a more efficient, flexible, and reliable equipment option for continuous flow reactions. Attached Figure Description
[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly introduced below. Obviously, the drawings described below only involve some embodiments of this utility model, and are not intended to limit this utility model.
[0017] Figure 1 This is a schematic diagram of the overall structure of the continuous flow reactor in Example 1;
[0018] Figure 2 yes Figure 1 The cross-sectional view in the middle;
[0019] Figure 3 This is an exploded view of the continuous flow reactor in Example 1;
[0020] Figure 4 This is a structural view of the stirring device in Embodiment 1;
[0021] Figure 5 yes Figure 4 A magnified view of point A in the middle.
[0022] Figure 6 This is an enlarged view of the gas-liquid separator in another embodiment.
[0023] Explanation of reference numerals in the attached figures:
[0024] 100. Pipe body; 101. Upper interface; 101a. First upper interface; 101b. Second upper interface; 102. Lower interface; 102a. First lower interface; 102b. Second lower interface; 200. Stirring device; 201. First impeller; 201a. First hole group; 202. Second impeller; 202a. First hole group; 203. Stirring shaft; 300. Motor; 400. Positioning seat; 500. Gas-liquid separator. Detailed Implementation
[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings. The components of the embodiments of this utility model described and shown in the accompanying drawings can be arranged and designed in various different configurations. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.
[0026] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0027] Unless otherwise defined, the technical or scientific terms used in this patent document shall have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model patent specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "an," "a," or "the" do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" indicate that the element or object preceding "comprising" encompasses the element or object listed following "comprising" or its equivalents, and do not exclude other elements or objects. Terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" are used only to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly. 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, and therefore should not be construed as a limitation of this utility model.
[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of 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.
[0029] The following is a detailed description of some embodiments of the present invention, accompanied by accompanying drawings. Unless otherwise specified, features in the following embodiments can be combined with each other.
[0030] Example 1:
[0031] This embodiment Figure 1 This is a schematic diagram of the overall structure of the dynamic mixing tubular continuous flow reactor in this embodiment. Figure 2 for Figure 1 Cross-sectional view, Figure 3 This is an exploded view of the reactor. As can be seen from the figure, the reactor mainly includes a tube 100 and a stirring device 200 rotatably disposed within the tube 100.
[0032] The upper end of the tube 100 has two upper ports, namely the first upper port 101a and the second upper port 101b, for introducing or discharging reactants; the lower end has two lower ports, namely the first lower port 102a and the second lower port 102b, for introducing or discharging materials. There is a predetermined height difference between the two upper ports 101a and 101b and between the two lower ports 102a and 102b, and they are staggered along the circumference of the tube 100. This design allows the equipment to select different ports for material introduction and discharge according to actual needs, improving the equipment's operational convenience and applicability. For example, in the chemical reaction of an acid and an alcohol to produce an ester, the raw materials containing the acid and alcohol are introduced into the tube 100 through the lower port 102 (either the first lower port 102a or the first lower port 102b), then water vapor and alcohol vapor are discharged through the first upper port 101a, and the ester-containing product is discharged through the second upper port 101b.
[0033] For example, in the chemical reaction of fatty acid (RCOOH) and ammonia (NH3) for dehydration, fatty acid is introduced through the second upper port 101b and ammonia is introduced through the first lower port 102a. During the reaction, ammonia and water vapor are discharged through the first upper port 101a, while products containing amide are discharged through the second lower port 102b.
[0034] The stirring device 200 includes a stirring shaft 203 extending along the central axis of the tube body 100, and a first blade 201 and a second blade 202 fixed to the stirring shaft 203. In this embodiment, to improve structural strength, the blades are integrally welded to the stirring shaft 203. There may also be three or more blades.
[0035] like Figure 4 As shown, both the first impeller 201 and the second impeller 202 have a width extending radially along the stirring shaft 203 and a length extending axially along the stirring shaft 203. The multiple flow holes on the first impeller 201 are divided into multiple first hole groups 201a arranged in a lengthwise array, and the multiple flow holes on the second impeller 202 are divided into multiple second hole groups 202a arranged in a lengthwise array. Along the length of the stirring shaft 203, the first hole groups 201a and the second hole groups 202a are staggered with a gap between them. This design further enhances the mixing effect of the materials, making the reaction more uniform.
[0036] At the same time, the length of the impeller is less than the distance between the two closest upper and lower interfaces on the axis of the stirring shaft, preventing material from overflowing from the upper and lower interfaces. Specifically, such as... Figure 2 As shown, the length of the blade is less than the distance between the second upper port 101b and the first lower port 102a, that is, the blade is located between the second upper port 101b and the first lower port 102a, to prevent material from gushing out from the upper or lower port under the stirring action. In this embodiment, both the upper and lower ports extend radially upward along the tube body 100. In another embodiment, they may also extend obliquely relative to the radial direction of the tube body 100.
[0037] Furthermore, combined Figure 5 As shown, both the first hole group 201a and the second hole group 202a include a row of open holes disposed along the edge of the blade and at least one row of closed holes disposed inside the blade. Figure 5 The diagram only shows one row of open holes and one row of closed holes. In other embodiments, there can be multiple rows of closed holes. When using multiple rows of closed holes, it is best to stagger the closed holes in adjacent rows along the axis of the stirring shaft. The design of open holes facilitates the flow and mixing of materials, while closed holes can control the flow direction of materials to a certain extent, thereby achieving more thorough mixing.
[0038] like Figure 5 As shown, the diameter of the closed hole ranges from 1 to 10 mm, preferably from 1 to 5 mm, and can be further preferably from 2 to 3 mm.
[0039] In this embodiment, the impeller and the stirring shaft 203 are integrally joined by metal casting or welding. They can also be fixedly connected by other mechanical means, or by other integral joining methods, such as die casting or riveting. This design improves the structural strength and stability of the equipment.
[0040] A positioning seat 400 is fixedly connected to the bottom of the tube body 100. The stirring shaft 203 is rotatably positioned on the positioning seat 400 via a bearing (not directly shown in the figure, but its presence is known from conventional structures), ensuring the stable rotation of the stirring shaft 203. Simultaneously, the stirring shaft 203 is driven by a variable frequency motor 300 via a coupler (not directly shown in the figure, but its presence is known from conventional drive structures), allowing the stirring speed to be adjusted according to actual needs. In this embodiment, the bearing is either a rolling bearing or a sliding bearing. A thrust bearing is preferred for the rolling bearing to withstand the axial force applied by the stirring shaft 203, while a copper bushing is preferred for the sliding bearing. The coupler can be a gear coupling or a spline coupling, as long as it enables the transmission connection between the motor shaft and the stirring shaft.
[0041] In the continuous flow reaction process, the reactants are introduced into the tube 100 through the first upper port 101a and / or the second upper port 101b, and are thoroughly mixed with other materials in the tube 100 under the stirring action of the stirring device 200. Because the impeller blades are equipped with flow holes, and the first hole group 201a and the second hole group 202a are arranged in a staggered manner, the reactants can form effective eddies and shear forces during the flow process, thereby achieving efficient mixing and uniform distribution. The mixed reaction products are discharged from the tube 100 through the first lower port 102a and / or the second lower port 102b.
[0042] In addition, the impeller in this invention can be at least one or more. When there are multiple impellers, the preferred method is to make the multiple impellers evenly distributed along the circumference of the stirring shaft, that is, symmetrically arranged.
[0043] In another embodiment, such as Figure 6 As shown, a gas-liquid separator 500 is attached to the upper end of the tube. The gas-liquid separator 500 is configured as a cone shape with a larger upper part and a smaller lower part. The gas containing liquid condenses in the conical space of the gas-liquid separator 500 and flows back into the tube, thus realizing gas-liquid separation.
[0044] The dynamic mixing tubular continuous flow reactor of this embodiment achieves efficient mixing and uniform distribution of reactants, improving reaction efficiency while enhancing the operational flexibility and applicability of the equipment. This reactor can be widely used in chemical, materials, environmental, pharmaceutical, and food industries, providing a more efficient, flexible, and reliable equipment option for continuous flow reactions.
[0045] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model 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 utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.
Claims
1. A dynamic mixing tubular continuous flow reactor, comprising a tube body and a stirring device rotatably disposed within the tube body, wherein the upper end of the tube body has at least one upper interface and the lower end has at least one lower interface; characterized in that, The stirring device includes: A stirring shaft extending along the central axis of the tube body; and at least one blade fixed to the stirring shaft, the blade having a width extending radially along the stirring shaft and a length extending axially along the stirring shaft; wherein the blade has a plurality of flow holes arranged in an array along the length direction, and the length of the blade is less than the distance between the upper and lower interfaces. The stirring shaft is attached with a first blade and a second blade. The multiple flow holes on the first blade are divided into multiple first hole groups arranged in the length direction, and the multiple flow holes on the second blade are divided into multiple second hole groups arranged in the length direction. In the length direction of the stirring shaft, the first hole groups and the second hole groups are staggered with a distance between them.
2. The dynamic mixing tubular continuous flow reactor according to claim 1, characterized in that, The first hole group includes a row of open holes disposed along the edge of the blade and at least a row of closed holes disposed inside the blade.
3. The dynamic mixing tubular continuous flow reactor according to claim 1, characterized in that, The second hole group includes a row of open holes disposed along the edge of the blade and at least a row of closed holes disposed inside the blade.
4. The dynamic mixing tubular continuous flow reactor according to claim 1, characterized in that, The stirring shaft has multiple blades, which are evenly distributed around the circumference of the stirring shaft.
5. The dynamic mixing tubular continuous flow reactor according to claim 1, characterized in that, A positioning seat is fixed to the bottom of the tube, and the stirring shaft is rotatably positioned on the positioning seat via a bearing.
6. The dynamic mixing tubular continuous flow reactor according to claim 1, characterized in that, The upper end of the tube is connected to a gas-liquid separator, which is configured as a cone shape that is larger at the top and smaller at the bottom.
7. The dynamic mixing tubular continuous flow reactor according to claim 1, characterized in that, The lower end of the tube has two lower interfaces with a set height difference between them, and the two lower interfaces are staggered along the circumference of the tube.
8. The dynamic mixing tubular continuous flow reactor according to claim 1 or 7, characterized in that, The upper end of the tube has two upper interfaces with a set height difference between them, and the two upper interfaces are staggered along the circumference of the tube.