Static mixer for chemical raw materials

Abstract

This utility model relates to the field of chemical equipment technology, and in particular to a static mixer for chemical raw materials. It includes a mixer cylinder with a support shaft inside. At least one set of mixing units is mounted on the support shaft. The mixing units on the support shaft, arranged from bottom to top, consist of: a guide plate, a right-handed blade, a guide plate, a left-handed blade, a guide plate, and another right-handed blade. The left-handed and right-handed blades have opposite helical directions. The guide plate has guide holes. The left-handed and right-handed blades are evenly spaced circumferentially. The support shaft or mixing unit is fixedly connected to the inner wall of the mixer cylinder. This static mixer for chemical raw materials, through the mixing units formed by the left-handed, right-handed blades, and guide plates, can simultaneously handle cutting and diffusion, improving mixing efficiency and effect, reducing pressure drop, and facilitating cleaning.

Description

Technical Field

[0001] This utility model relates to the field of chemical equipment technology, and in particular to a static mixer for chemical raw materials. Background Technology

[0002] Before chemical materials undergo a reaction, raw materials and auxiliary materials are mixed in a certain proportion. For example, when coal-derived ethylene glycol and oil-derived ethylene glycol are mixed to produce esterified ethylene glycol, a traditional spiral mixer is used for mixing.

[0003] However, existing mixing technologies often suffer from insufficient mixing efficiency (CV value > 5%) in the laminar-turbulent transition zone of medium and low viscosity materials such as ethylene glycol; pressure drop and mixing effect are contradictory, increasing the number of units can improve uniformity, but the pressure drop increases significantly; cleaning is difficult, and material residue is easy to remain (especially after long-term operation); and the mixing process requires the use of multiple mixing structures, which can lead to excessive equipment complexity, affecting subsequent maintenance and continuous operation of the equipment. Utility Model Content

[0004] To address the aforementioned technical deficiencies, this invention provides a static mixer for chemical raw materials, which can efficiently mix medium and low viscosity chemical materials with low pressure drop.

[0005] This utility model discloses a static mixer for chemical raw materials, including a mixer cylinder with connecting flanges at both ends. A support shaft is installed inside the mixer cylinder along its axial direction. At least one set of mixing units is installed on the support shaft. Each mixing unit includes two right-handed blades, one left-handed blade, and three guide plates. The mixing unit is arranged on the support shaft from bottom to top as follows: guide plate, right-handed blade, guide plate, left-handed blade, guide plate, and right-handed blade. The left-handed blade and the right-handed blade have opposite spiral directions. Guide holes are provided on the guide plates. The left-handed blade and the right-handed blade are evenly spaced circumferentially. The support shaft or mixing unit is fixedly connected to the inner wall of the mixer cylinder.

[0006] The flow guide holes on the flow guide plate have a coverage rate of 40-50%.

[0007] The torsion angle of both the left-handed and right-handed blades is 180°, and the projection of the left-handed and right-handed blades on the radial section of the mixer cylinder covers 80% of the inner diameter of the mixer cylinder.

[0008] The inner wall of the mixer cylinder is connected to both ends of the support shaft by spaced-out support rods; or welding plates extend outward from the ends of the right-handed blades at the top and bottom layers, and positioning holes are provided on the welding plates. Positioning blocks are fixed on the inner wall of the mixer cylinder at the corresponding positions of the welding plates, and positioning pins are provided on the positioning blocks. The positioning pins are connected to the positioning holes.

[0009] The static mixer for chemical raw materials obtained by this invention, through the mixing unit formed by the left-handed blade, the right-handed blade and the guide plate, can take into account both cutting and diffusion, improve mixing efficiency and effect, reduce pressure drop and facilitate cleaning. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model;

[0011] Figure 2 This is a cross-sectional view of the structure of this utility model;

[0012] Figure 3 This is a partial cross-sectional schematic diagram of the mixer cylinder of this utility model;

[0013] Figure 4 This is a schematic diagram of the hybrid unit structure of this utility model. Detailed Implementation

[0014] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0015] Example 1:

[0016] like Figures 1-4 As shown, this utility model discloses a static mixer for chemical raw materials, including a mixer body 1. Connecting flanges 2 are provided at both ends of the mixer body 1. A support shaft 3 is provided inside the mixer body 1, and the support shaft 3 is arranged along the axial direction of the mixer body 1. Two sets of mixing units are arranged on the support shaft 3. Each mixing unit includes two right-handed blades 4, one left-handed blade 8, and three guide plates 5. The mixing unit's arrangement on the support shaft 3 from bottom to top is: guide plate 5, right-handed blade 4, guide plate 5, left-handed blade 8, guide plate 5, and right-handed blade 4. The left-handed blade 8 and the right-handed blade 4 have opposite spiral directions. Guide holes 9 are provided on the guide plate 5. The left-handed blade 8 and the right-handed blade 4 are evenly spaced circumferentially. The mixing units are fixedly connected to the inner wall of the mixer body 1.

[0017] The mixer cylinder 1 is a hollow cylindrical structure with connecting flanges 2 at both ends. It can be installed on pipelines transporting chemical raw materials to mix them during transport. For example, the mixer cylinder 1 can be installed on a pipeline transporting a mixture of coal-derived ethylene glycol and oil-derived ethylene glycol via connecting flanges 2, allowing for further uniform mixing during transport. The mixing units are fixedly connected to the mixer cylinder 1, with the support shaft 3 and mixing units fixed inside the cylinder 1. The support shaft 3 has, from bottom to top, a guide plate 5, a right-handed blade 4, a left-handed blade 8, and another guide plate 5. Since there are two sets of mixing units, additional guide plates 5, right-handed blades 4, left-handed blades 8, and right-handed blades 4 are also installed. These guide plates 5, left-handed blades 8, and right-handed blades 4 are spaced apart. The left-handed blades 8 and right-handed blades 4 have opposite spiral directions. When the chemical raw materials flow from one end of the mixer cylinder 1 to the other, the diffusion and shearing of the fluid are achieved by the left-handed blades 8 and right-handed blades 4 in conjunction with the guide plate 5, which can effectively reduce the pressure drop. The alternating arrangement of the right-handed blades 4 and left-handed blades 8 can better improve the mixing effect and efficiency.

[0018] Since the two ends of the mixer cylinder 1 are connected to the pipeline through the connecting flange 2, after a certain period of mixing, the mixer cylinder 1 can be disassembled to clean the internal mixing unit according to actual needs, which is quick and convenient.

[0019] The coverage of the guide holes 9 on the guide plate 5 is 40-50%. Preferably, the coverage of the guide plate 5 is 40%, that is, the area of ​​the guide holes 9 accounts for 40% of the total area of ​​the guide plate 5. During the shearing, guiding and diffusion of the fluid by the left-handed blade 8 and the right-handed blade 4, the fluid flowing between the left-handed blade 8 and the right-handed blade 4 partially passes through the guide holes 9 on the guide plate 5, while part of it flows through the outside of the guide plate 5 under the pressure of the fluid, which further improves the mixing uniformity between the chemical raw materials.

[0020] The torsion angles of the left-handed blade 8 and the right-handed blade 4 are both 180°, and the projections of the left-handed blade 8 and the right-handed blade 4 on the radial section of the mixer cylinder 1 cover 80% of the inner diameter of the mixer cylinder 1.

[0021] The torsion angles of the left-handed blade 8 and the right-handed blade 4 are both 180°, and they are evenly and alternately arranged on the support shaft 3. The projections of two adjacent left-handed blades 8 and right-handed blades 4 on the radial section of the mixer cylinder 1 are without gaps, which makes the mixing of the fluid more uniform. At the same time, the projections of the left-handed blades 8 and right-handed blades 4 on the radial section of the mixer cylinder 1 cover 80% of the inner diameter of the mixer cylinder 1, so as to ensure the flowability of the fluid and reduce the pressure drop while stirring and mixing the chemical raw materials.

[0022] Welded plates 6 extend outward from the ends of the right-handed blades 4 at the top and bottom layers. Positioning holes 7 are provided on the welded plates 6. Positioning blocks 10 are fixed to the inner wall of the mixer cylinder 1 at locations corresponding to the welded plates 6. Positioning pins 11 are provided on the positioning blocks 10, and these pins 11 engage with the positioning holes 7. Since the right-handed blades 4 and the support shaft 3 are fixedly connected as a single unit, the entire mixing unit can be fixed by the engagement of the welded plates 6 on the right-handed blades 4 and the positioning blocks 10 on the mixer cylinder 1. This ensures the mixing unit remains stable during fluid flow, guaranteeing stable and reliable mixing and shearing of the fluid. Furthermore, the mixing unit, along with the support shaft 3, can be easily removed from the mixer cylinder 1 for cleaning.

[0023] Of course, in other embodiments, the inner wall of the mixer cylinder 1 can be connected to both ends of the support shaft 3 by spaced-apart support rods. This fixing method provides a firm and stable fixation for the mixing unit, but its disassembly and assembly are relatively troublesome.

[0024] This invention increases the staged mixing and fluid segmentation in the chemical raw material mixing process, enabling the fluid in the mixing process to generate micro-turbulence in the chemical raw material mixing and cutting fluid, dividing it into multiple fine streams, increasing the contact interface, breaking the boundary layer of the boundary layer, increasing the mixing efficiency and reducing the pressure drop of the fluid during mixing.

[0025] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application 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 application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0026] In the description of this application, it should be noted that, unless otherwise expressly 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; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the interaction relationship between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0027] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0028] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simplification, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A static mixer for chemical feedstocks, characterized in that: The mixer includes a mixer body with connecting flanges at both ends. A support shaft is located inside the mixer body, axially aligned with the mixer body. At least one set of mixing units is mounted on the support shaft. Each mixing unit comprises two right-handed blades, one left-handed blade, and three guide plates. The mixing unit's arrangement on the support shaft from bottom to top is: guide plate, right-handed blade, guide plate, left-handed blade, guide plate, right-handed blade. The left-handed blade and right-handed blade have opposite helical directions. Guide holes are provided on the guide plates. The left-handed and right-handed blades are evenly spaced circumferentially. The support shaft or mixing unit is fixedly connected to the inner wall of the mixer body.

2. A static mixer for chemical raw materials according to claim 1, characterized in that: The flow guide holes on the flow guide plate have a coverage rate of 40-50%.

3. A static mixer for chemical raw materials according to claim 1, characterized in that: The torsion angle of both the left-handed and right-handed blades is 180°, and the projection of the left-handed and right-handed blades on the radial section of the mixer cylinder covers 80% of the inner diameter of the mixer cylinder.

4. A static mixer for chemical raw materials according to claim 1, characterized in that: The inner wall of the mixer cylinder is connected to both ends of the support shaft by spaced-out support rods; or welding plates extend outward from the ends of the right-handed blades at the top and bottom layers, and positioning holes are provided on the welding plates. Positioning blocks are fixed on the inner wall of the mixer cylinder at the corresponding positions of the welding plates, and positioning pins are provided on the positioning blocks. The positioning pins are connected to the positioning holes.

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