Fluid static mixer
By using a fluid static mixer in the polymer melt pipeline, the design of convergence and divergence channels is achieved to achieve uniform mixing of fluids in the pipeline, solving the problem of inconsistent flow velocity and residence time, and improving the consistency and quality of the product.
Patent Information
- Application Number
- CN202422484584.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-15
- Publication Date
- 2025-08-22
- Estimated Expiration
- 2034-10-15
AI Technical Summary
In polymer melt pipelines, the cross-section of the fluid along the pipe direction when the fluid flows in the pipe is parabolic, resulting in slow flow rate of the fluid near the pipe wall and long residence time, resulting in problems such as inconsistent molecular weight, poor product consistency and many impurities.
A fluid static mixer is designed, including a convergence channel and a divergence channel arranged at intervals within the mixer body. The convergence channel transports the fluid on the circumference of the mixer feed end to the inner side, and the divergence channel transports the fluid at the middle of the feed end to the outer side. It is used in combination with multiple mixers to achieve uniform mixing of the fluid in the pipeline.
The residence time consistency of the fluid in the pipeline is achieved, the uniformity of fluid mixing and the consistency of the degree of polymerization is improved, impurities are reduced, and product quality is improved.
Smart Images
Figure CN223249129U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of fluids, in particular to equipment for mixing flowing polymer melts in a pipeline, specifically a fluid static mixer. Background Art
[0002] In polymer melt pipelines, the cross-section of the fluid flowing along the pipe often exhibits a parabolic shape. This phenomenon is caused by the influence of fluid viscosity, which causes the flow rate of the fluid near the pipe wall to be slower than that of the fluid near the center of the pipe. This phenomenon is particularly important to avoid in polymerization reactors, especially polycondensation reactors. The fluid near the pipe wall has a longer residence time than the fluid in the center of the pipe, which can lead to problems such as higher molecular weight near the pipe wall, poor product consistency, and high levels of impurities. Utility Model Content
[0003] The purpose of the utility model is to provide a fluid static mixer to solve the technical problems of uneven fluid mixing and inconsistent residence time in the process of pipeline transmission of polymer melt.
[0004] The purpose of this utility model is solved by the following technical solutions:
[0005] A fluid static mixer, characterized in that: the fluid static mixer includes a mixer body, in which convergent channels and divergent channels are arranged at intervals. The convergent channel can transport the fluid on the peripheral side of the feed end of the mixer body to the inside and output it from the middle of the discharge end of the mixer body. The divergent channel can transport the fluid in the middle of the feed end of the mixer body to the outside and output it from the peripheral side of the discharge end of the mixer body.
[0006] The two ends of the convergent channel are respectively arranged with a convergent inlet and a convergent outlet, and the two ends of the divergent channel are respectively arranged with a divergent inlet and a divergent outlet. The convergent inlet is located at the peripheral side of the feed end of the mixer body, and the divergent inlet is located in the middle of the feed end of the mixer body. The convergent outlet is located in the middle of the discharge end of the mixer body, and the divergent outlet is located at the peripheral side of the discharge end of the mixer body.
[0007] Any convergent channel is located on one side of the central axis of the mixer body, and any divergent channel is located on one side of the central axis of the mixer body; the convergent channel and the divergent channel are not connected to each other.
[0008] The feed end of the mixer body is provided with an inward tapered inlet, and the cross section of the inward tapered inlet is W-shaped.
[0009] The bottom of the inward tapered inlet is located in the inlet area of the convergent channel and the closed loop formed at the bottom of the inward tapered inlet can connect the inlets of all convergent channels; the middle protruding area of the inward tapered inlet is the inlet area of the divergent channel, and all divergent channels are arranged around the central axis of the mixer body.
[0010] The discharge end of the mixer body is provided with an inward tapered outlet, and the cross section of the inward tapered outlet is V-shaped.
[0011] The outlet area of the convergent channel is located at the bottom area of the inward tapered outlet; the outlet area of the divergent channel is located at the upper part of the inward tapered outlet.
[0012] The convergent channels are evenly distributed along the circumference of the mixer body and the number of the convergent channels is ≥2, the divergent channels are evenly distributed along the circumference of the mixer body and the number of the divergent channels is ≥2, and the number of the convergent channels is equal to the number of the divergent channels.
[0013] The inlet of the convergent channel forms an introduction notch on the peripheral wall of the feed end of the mixer body, and the introduction notch is used to guide the fluid on the peripheral side of the feed end of the mixer body into the convergent channel.
[0014] The outlet of the diverging channel forms a lead-out notch on the peripheral wall of the mixer body's discharge end, and the lead-out notch is used to guide the fluid in the diverging channel to flow toward the peripheral side of the mixer body's discharge end.
[0015] The mixer body is cylindrical.
[0016] The mixer body is outer-mounted with a flange, and the flange and the mixer body are integrally formed.
[0017] Compared with the prior art, the present invention has the following advantages:
[0018] The convergent channel of the fluid static mixer provided by the utility model can transport the fluid on the peripheral side of the feed end of the mixer body to the inside and output it from the middle of the discharge end of the mixer body; the divergent channel can transport the fluid in the middle of the feed end of the mixer body to the outside and output it from the peripheral side of the discharge end of the mixer body. When applied to a pipeline, the fluid near the pipe wall can be transferred to the vicinity of the pipe center, and the fluid in the pipe center can be transferred to the vicinity of the pipe wall at the same time. In the pipeline system, multiple static mixers are used in combination to keep the residence time of the fluid in the pipeline consistent.
[0019] When the fluid static mixer provided by the utility model is used, high-viscosity fluids near the pipe wall and near the center of the pipe can be exchanged once or multiple times through one or more fluid static mixers, thereby achieving the purpose of making the mixing time, reaction time and polymerization degree of the fluids in the pipe consistent. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Attachment Figure 1 A schematic diagram of the main structure of the fluid static mixer provided by the present invention;
[0021] Attachment Figure 2 A rear structural schematic diagram of the fluid static mixer provided by the present invention;
[0022] Attachment Figure 3 A schematic cross-sectional view of the fluid static mixer provided by the present invention;
[0023] Attachment Figure 4 This is a schematic diagram of the three-dimensional structure of the fluid static mixer provided by the present invention.
[0024] Among them: 1—mixer body; 2—flange; 3—inward tapered inlet; 4—convergent inlet; 5—divergent inlet; 6—convergent channel; 7—convergent outlet; 8—divergent outlet; 9—inward tapered outlet; 10—divergent channel. DETAILED DESCRIPTION
[0025] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concepts of the example embodiments to those skilled in the art. Like reference numerals in the figures represent like or similar structures, and thus their detailed description will be omitted.
[0026] The terms "a", "an", "the", and "said" are used to indicate the presence of one or more elements / components / etc.; the terms "including" and "having" are used to express an open-ended inclusive meaning and mean that additional elements / components / etc. may be present in addition to the listed elements / components / etc.
[0027] like Figure 1-4As shown: A fluid static mixer, the fluid static mixer includes a mixer body 1, the mixer body 1 is preferably cylindrical, and a convergent channel 6 and a divergent channel 10 are arranged at intervals in the mixer body 1, and a convergent inlet 4 and a convergent outlet 7 are arranged at both ends of the convergent channel 6, and a divergent inlet 5 and a divergent outlet 8 are arranged at both ends of the divergent channel 10, the convergent inlet 4 is located on the peripheral side of the feed end of the mixer body 1, the divergent inlet 5 is located in the middle of the feed end of the mixer body 1, the convergent outlet 7 is located in the middle of the discharge end of the mixer body 1, and the divergent outlet 8 is located on the peripheral side of the discharge end of the mixer body 1; the convergent channel 6 can transport the fluid on the peripheral side of the feed end of the mixer body 1 to the inside and output it from the middle of the discharge end of the mixer body 1, and the divergent channel 10 can transport the fluid in the middle of the feed end of the mixer body 1 to the outside and output it from the peripheral side of the discharge end of the mixer body 1.
[0028] It should be noted that the convergent channel 6 and the divergent channel 10 are independently arranged. Not only are the convergent channel 6 and the divergent channel 10 themselves not connected to each other, but the inlets and outlets of the convergent channel 6 and the divergent channel 10 are also independent of each other. In order to meet this requirement, any convergent channel 6 is located on one side of the central axis of the mixer body 1, and any divergent channel 10 is located on one side of the central axis of the mixer body 1.
[0029] Furthermore, the feed end of the mixer body 1 is provided with an inwardly tapered inlet 3 having a W-shaped cross section. The bottom of the inwardly tapered inlet 3 is located at the inlet region of the convergent channel 6, and the closed loop formed at the bottom of the inwardly tapered inlet 3 can connect the inlets of all the convergent channels 6. The central protruding area of the inwardly tapered inlet 3 is the inlet region of the divergent channels 10, and all the divergent channels 10 are arranged around the central axis of the mixer body 1. The discharge end of the mixer body 1 is provided with an inwardly tapered outlet 9 having a V-shaped cross section. The outlet region of the convergent channel 6 is located at the bottom region of the inwardly tapered outlet 9; the outlet region of the divergent channel 10 is located above the inwardly tapered outlet 9.
[0030] In order to improve uniformity, the convergent channels 6 are evenly distributed along the circumference of the mixer body 1 and the number of the convergent channels 6 is ≥2, the divergent channels 10 are evenly distributed along the circumference of the mixer body 1 and the number of the divergent channels 10 is ≥2, and the number of the convergent channels 6 is equal to the number of the divergent channels 10.
[0031] In order to improve efficiency, the inlet of the convergent channel 6 forms an introduction notch on the peripheral wall of the feed end of the mixer body 1, and the introduction notch is used to guide the fluid on the peripheral side of the feed end of the mixer body 1 into the convergent channel 6; the outlet of the divergent channel 10 forms an exit notch on the peripheral wall of the discharge end of the mixer body 1, and the exit notch is used to guide the fluid in the divergent channel 10 to flow toward the peripheral side of the discharge end of the mixer body 1.
[0032] In order to improve the adaptability of static mixers for the same type of fluid, an integrally formed flange 2 may be disposed outside the mixer body 1 to form a static mixer for the fluid. Flanges 2 of different specifications can be adapted to different pipelines. Example
[0033] A fluid static mixer such as Figure 1-4 As shown, the fluid static mixer mentioned in the present invention is manufactured in one piece. A flange 2 is provided on the mixer body 1 to facilitate the installation of the fluid static mixer in a pipeline system. In addition to the flange structure proposed in the present invention, a flangeless structure can also be made, so that the fluid static mixer can be directly placed in the pipeline.
[0034] like Figure 1-4 The fluid static mixer shown includes a mixer body 1, a flange 2, an inward conical inlet 3, a convergent inlet 4, a divergent inlet 5, a convergent channel 6, a convergent outlet 7, a divergent outlet 8, an inward conical outlet 9, and a divergent channel 10. A flange 2 is arranged on the outside of the mixer body 1, four convergent inlets 4 are arranged at the outer edge of the feed end of the mixer body 1, and four convergent outlets 7 surrounding the central axis of the mixer body 1 are arranged in the middle of the discharge end of the mixer body 1. The four convergent inlets 4 and the four convergent outlets 7 are connected by corresponding convergent channels 6, respectively. Four divergent inlets 5 surrounding the central axis of the mixer body 1 are arranged in the middle of the feed end of the mixer body 1, and four divergent outlets 8 are arranged at the outer edge of the discharge end of the mixer body 1. The four divergent inlets 5 and the four divergent outlets 8 are connected by corresponding divergent channels 10, respectively. An inward conical inlet 3 is arranged at the feed end of the mixer body 1, and an inward conical outlet 9 is arranged at the discharge end.
[0035] refer to Figure 1 、 Figure 3 、 Figure 4 A convergent inlet 4 is provided at the feed end of the mixer body 1 near the outer edge of the mixer body 1, and the convergent inlet 4 is uniformly distributed along the circumference of the mixer body 1, and the number thereof is not limited to the 4 shown in the figure, and the number thereof is ≥2; a divergent inlet 5 is provided at the feed end of the mixer body 1 near the center of the mixer body 1, and the divergent inlets 5 are uniformly distributed along the circumference of the mixer body 1, and the number thereof is not limited to the 4 shown in the figure, and the number of the divergent inlets 5 is ≥2 and the number is the same as the convergent inlet 4.
[0036] refer to Figure 2 、 Figure 3 A convergent outlet 7 is provided at the discharge end of the mixer body 1 near the center of the mixer body 1 . The convergent outlets 7 are evenly distributed along the circumference of the mixer body 1 , and their number is consistent with the number of the convergent inlets 4 . Along the axial direction of the mixer body 1 , the center of the convergent outlet 7 and the center of the convergent inlet 4 are in the same cross section.
[0037] refer to Figure 2 、 Figure 3 A divergent outlet 8 is provided at the discharge end of the mixer body 1 near the outer edge of the mixer body 1 . The divergent outlets 8 are evenly distributed along the circumference of the mixer body 1 , and their number is consistent with the number of the divergent inlets 5 . Along the axial direction of the mixer body 1 , the center of the divergent outlet 8 and the center of the divergent inlet 5 are in the same cross section.
[0038] refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 A convergent channel 6 is set between the feed end and the discharge end of the mixer body 1, and the convergent channel 6 connects the convergent inlet 4 and the convergent outlet 7. The number of convergent channels 6 is consistent with the number of convergent inlets 4; a divergent channel 10 is set between the feed end and the discharge end of the mixer body 1, and the divergent channel 10 connects the divergent inlet 5 and the divergent outlet 8. The number of divergent channels 10 is consistent with the number of divergent inlets 5.
[0039] refer to Figure 1 、 Figure 3 、 Figure 4 An inward tapered inlet 3 is provided at the feed end of the mixer body 1. The cross-section of the inward tapered inlet 3 along the axial direction is "W"-shaped. The convergent inlets 4 arranged along the outer edge of the feed end of the mixer body 1 are connected through the bottom of the "W" shape. The inward tapered inlet 3 is provided to guide the fluid near the pipe wall into the convergent channel 6.
[0040] refer to Figure 2 、 Figure 3 The discharging end of the mixer body 1 is provided with an inward tapered outlet 9, which is "V"-shaped along the axial cross section. The inward tapered outlet 9 is provided so that the convergent channel 6 is shorter than the divergent channel 10, thereby shortening the time for the material to pass through the convergent channel 6.
[0041] refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 The four convergent inlets 4 are independent of each other and are evenly distributed along the circumference of the mixer body 1. The four convergent outlets 7 are independent of each other and are evenly distributed on the circumference of the central axis of the mixer body 1. The four divergent inlets 5 are independent of each other and are evenly distributed on the circumference of the central axis of the mixer body 1. The four divergent outlets 8 are independent of each other and are evenly distributed along the circumference of the mixer body 1. In this way, each convergent channel 6 and each divergent channel 10 are also independent of each other and do not exceed the central axis of the mixer body 1. Only the extension line of the outlet side of the convergent channel 6 and the extension line of the inlet side of the divergent channel 10 will intersect.
[0042] When one or more of the above-mentioned fluid static mixers are installed in a pipeline, they can exchange high-viscosity fluids near the pipeline wall and near the center of the pipeline once or multiple times, thereby achieving the purpose of making the mixing time, reaction time and polymerization degree of the fluids in the pipeline consistent.
[0043] The convergent channel 6 of the fluid static mixer provided by the present invention can transport the fluid on the peripheral side of the feed end of the mixer body 1 to the inside and output it from the middle of the discharge end of the mixer body 1. The divergent channel 10 can transport the fluid in the middle of the feed end of the mixer body 1 to the outside and output it from the peripheral side of the discharge end of the mixer body 1. When applied to a pipeline, the fluid near the pipe wall can be transferred to the vicinity of the pipe center, and the fluid in the pipe center can be transferred to the vicinity of the pipe wall at the same time. In the pipeline system, multiple static mixers are used in combination to keep the residence time of the fluid in the pipeline consistent.
[0044] In the embodiments of the present invention, the term "plurality" refers to two or more, unless otherwise specified. Terms such as "installed," "connected," and "fixed" should be interpreted broadly. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection. Those skilled in the art will understand the specific meanings of these terms in the embodiments of the present invention based on the specific circumstances.
[0045] In the description of the embodiments of the present invention, it is necessary to understand that the terms "upper" and "lower" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the embodiments of the present invention.
[0046] Throughout this specification, terms such as "one embodiment" and "a preferred embodiment" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
[0047] The above embodiments are only for illustrating the technical idea of the present invention and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the present invention shall fall within the protection scope of the present invention; any technology not involved in the present invention can be realized by existing technology.
Claims
1. A fluid static mixer, characterized in that: The fluid static mixer comprises a mixer body (1), wherein a convergent channel (6) and a divergent channel (10) are arranged at intervals in the mixer body (1); the convergent channel (6) can transport the fluid on the peripheral side of the feed end of the mixer body (1) toward the inside and output it from the middle of the discharge end of the mixer body (1); and the divergent channel (10) can transport the fluid in the middle of the feed end of the mixer body (1) toward the outside and output it from the peripheral side of the discharge end of the mixer body (1).
2. The fluid static mixer according to claim 1, characterized in that: Any convergent channel (6) is located on one side of the central axis of the mixer body (1), and any divergent channel (10) is located on one side of the central axis of the mixer body (1); the convergent channel (6) and the divergent channel (10) are not connected to each other.
3. The fluid static mixer according to claim 1, characterized in that: The feed end of the mixer body (1) is provided with an inward tapered inlet (3), and the cross section of the inward tapered inlet (3) is W-shaped.
4. The fluid static mixer according to claim 3, characterized in that: The bottom of the inward conical inlet (3) is located in the inlet area of the convergent channel (6), and the closed loop formed at the bottom of the inward conical inlet (3) can connect the inlets of all the convergent channels (6); the middle protruding area of the inward conical inlet (3) is the inlet area of the divergent channel (10), and all the divergent channels (10) are arranged around the central axis of the mixer body (1).
5. The fluid static mixer according to claim 1, characterized in that: The discharge end of the mixer body (1) is provided with an inward tapered outlet (9), and the cross section of the inward tapered outlet (9) is V-shaped.
6. The fluid static mixer according to claim 5, characterized in that: The outlet area of the convergent channel (6) is located at the bottom area of the inward tapered outlet (9); and the outlet area of the divergent channel (10) is located at the upper part of the inward tapered outlet (9).
7. The fluid static mixer according to claim 1, characterized in that: The convergent channels (6) are evenly distributed along the circumference of the mixer body (1), and the number of the convergent channels (6) is ≥2; the divergent channels (10) are evenly distributed along the circumference of the mixer body (1), and the number of the divergent channels (10) is ≥2, and the number of the convergent channels (6) is equal to the number of the divergent channels (10).
8. The fluid static mixer according to claim 1, characterized in that: The inlet of the convergent channel (6) forms an introduction notch on the peripheral wall of the feed end of the mixer body (1), and the introduction notch is used to guide the fluid on the peripheral side of the feed end of the mixer body (1) into the convergent channel (6).
9. The fluid static mixer according to claim 1, characterized in that: The outlet of the diverging channel (10) forms a lead-out notch on the peripheral wall of the mixer body (1) discharge end, and the lead-out notch is used to guide the fluid in the diverging channel (10) to flow toward the peripheral side of the mixer body (1) discharge end.
10. The fluid static mixer according to any one of claims 1 to 9, characterized in that: The mixer body (1) is provided with a flange (2) on its outer sleeve, and the flange (2) and the mixer body (1) are integrally formed.