Venturi interface mixer based on dispersed turbulent flow

Abstract

The utility model relates to the technical field of material mixing, and discloses a venturi interface mixer based on dispersed turbulent flow, which comprises a first pipeline and a second pipeline, the first pipeline is used for conveying a material A, the first pipeline is provided with a branch pipe and a first venturi pipe which are arranged at an interval along the flowing direction of the material A, and the second pipeline is provided with a second venturi pipe. The second pipeline is used for conveying a material B, a second Venturi tube is arranged on the second pipeline, one end of the branch pipe is communicated with the first pipeline, the other end of the branch pipe is communicated to a throat pipe section of the second Venturi tube, and the branch pipe is used for conveying part of the material A in the first pipeline to the throat pipe section of the second Venturi tube. The second pipeline is communicated to the throat pipe section of the first Venturi pipe and is used for conveying a mixture of the material B and part of the material A to the throat pipe section of the first Venturi pipe; and impeller assemblies are arranged at the discharge ends of the branch pipes and / or the discharge end of the second pipeline, so that the energy loss of the materials can be effectively reduced on the premise of ensuring the efficient mixing of the materials.

Description

Technical Field

[0001] The utility model relates to the technical field of material mixing, in particular to a venturi interface mixer based on dispersed turbulence. Background Art

[0002] In the related art, pipeline mixers are often used for liquid-liquid and liquid-gas mixing in continuous production. Due to the advantages of simple structure and high efficiency, pipeline mixers are widely used in chemical industry, biomanufacturing and environmental protection. However, when the proportions of the mixed materials are quite different and the mixing requirements are relatively high, conventional pipeline mixers are difficult to meet the mixing requirements. The local unevenness in the mixed materials will seriously affect the normal progress of the subsequent processes, such as the unevenness of acid-base adjustment in chemical reactions. For this reason, the common pipeline mixers are generally composed of pipelines and nozzles, vortex chambers, porous plates, special-shaped plates and other structural elements. The materials to be mixed will produce diversion, cross-mixing and reverse swirl in the process of passing through these structural elements, which greatly improves the mixing effect between the materials, but also hinders the normal flow of materials and causes a large amount of energy loss.

[0003] Therefore, how to reduce energy loss while ensuring efficient mixing of materials has become a technical problem that technical personnel in this field urgently need to solve. Utility Model Content

[0004] The utility model aims to solve the problem that in order to improve the material mixing effect, the existing pipeline mixer adds structural elements such as porous plates and special-shaped plates, which leads to a large amount of energy loss of the material, and provides a Venturi interface mixer based on dispersed turbulence. The Venturi interface mixer has the advantages of good mixing effect and less energy loss.

[0005] In order to achieve the above object, the utility model provides a Venturi interface mixer based on dispersed turbulence, the Venturi interface mixer comprising:

[0006] A first pipeline, the first pipeline is used to transport material A, and the first pipeline is provided with branch pipes and a first venturi tube arranged at intervals along the flow direction of material A; and

[0007] A second pipeline, wherein the second pipeline is used to transport material B and a second venturi tube is provided on the second pipeline;

[0008] One end of the branch pipe is connected to the first pipeline, and the other end is connected to the throat section of the second venturi tube, so as to transport part of the material A in the first pipeline to the throat section of the second venturi tube, and the second pipeline is connected to the throat section of the first venturi tube to transport the mixture of material B and part of the material A to the throat section of the first venturi tube;

[0009] The discharge end of the branch pipe and / or the discharge end of the second pipeline is provided with an impeller assembly.

[0010] Optionally, the impeller assembly comprises a support rod, an impeller shaft and an impeller blade, the impeller shaft is rotatably disposed at the center of the lumen of the branch pipe and / or the second pipe through the support rod, and the rotation centerline of the impeller shaft coincides with the centerline of the branch pipe or the second pipe along their respective length directions;

[0011] A plurality of impeller blades are provided, and the plurality of impeller blades are arranged at intervals along the circumference of the impeller shaft, so as to stir and disperse the material in the branch pipe or the second pipe when the impeller shaft rotates.

[0012] Optionally, the surface of the impeller blade forms an angle with the material flow direction in the branch pipe or the second pipe; and / or

[0013] The cross section of the support rod is configured to be in a pointed shape in a direction toward the incoming material side of the branch pipe or the second pipeline.

[0014] Optionally, the branch pipe is provided with a first valve, and the first valve is used to adjust the flow rate of material A in the branch pipe; and / or

[0015] A second valve is provided on the second pipeline downstream of the second venturi tube, and the second valve is used to adjust the flow rate of the mixture of material B and part of material A.

[0016] Optionally, the inner diameter of the second pipe is smaller than the inner diameter of the first pipe.

[0017] Optionally, a spiral conduit is obliquely connected to the first pipeline between the branch pipe and the first venturi tube, and the spiral conduit is used to introduce compressed gas into the first pipeline.

[0018] Optionally, the angle between the spiral conduit and the upstream section of the first pipeline is less than or equal to 30°; and / or

[0019] The cross-sectional area of ​​the spiral conduit gradually decreases in a direction toward the air flow outlet.

[0020] Optionally, at least three spiral ribs are provided on the inner wall of the spiral conduit, and the at least three spiral ribs are respectively extended along the length direction of the spiral conduit.

[0021] Optionally, the cross-section of each spiral rib is triangular.

[0022] Optionally, the twisting angle of each spiral rib is 90°-1080°.

[0023] Through the above technical solution, when material B flows through the contraction section and throat section of the second venturi tube, material B is accelerated and low pressure is generated, and the low pressure can suck part of material A from the first pipeline in the branch pipe into the second venturi tube, so as to achieve a primary mixing of part of material A and material B; similarly, when the remaining material A in the first pipeline flows through the contraction section and throat section of the first venturi tube, the remaining material A is accelerated and low pressure is generated, and the low pressure can suck the mixture of material B and part of material A in the second pipeline into the first venturi tube, so as to achieve a secondary mixing of material A and material B;

[0024] In addition, the impeller assembly arranged at the discharge end of the branch pipe can disturb part of the material A that is about to enter the second venturi tube, so as to improve the effect of mixing the part of the material A with the material B through the second venturi tube; similarly, the impeller assembly arranged at the discharge end of the second pipeline can disturb the mixture of material B and part of the material A that is about to enter the first venturi tube, so as to improve the effect of mixing it with the remaining material A through the first venturi tube. Compared with the solution of introducing structural elements such as porous plates and special-shaped plates in the existing pipeline material mixing device, the impeller assembly arranged in the utility model generates less resistance to the fluid. Therefore, the Venturi interface mixer based on dispersed turbulence provided by the utility model can effectively reduce the energy loss of the material while ensuring efficient mixing of the material. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of a Venturi interface mixer based on dispersed turbulence provided by the utility model;

[0026] Figure 2 It is a cross-sectional schematic diagram of a spiral catheter provided by the utility model;

[0027] Figure 3 It is a top view of an impeller assembly provided by the utility model.

[0028] Description of Reference Numerals

[0029] 10. First pipeline; 11. Branch pipe; 111. First valve; 12. First venturi tube; 20. Second pipeline; 21. Second venturi tube; 22. Second valve; 30. Spiral guide tube; 31. Spiral rib; 40. Impeller assembly; 41. Support rod; 42. Impeller shaft; 43. Impeller blade. DETAILED DESCRIPTION

[0030] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0031] It should be noted that in the description of the present invention, "first", "second" and similar words do not indicate any order, quantity or importance, but are only used to distinguish different parts. "Include" or "comprises" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements.

[0032] It should also be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. When a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.

[0033] All terms used in the present invention have the same meanings as those understood by ordinary technicians in the field to which the present invention belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined herein.

[0034] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0035] As mentioned above, combined with Figure 1 As shown, the utility model provides a Venturi interface mixer based on dispersed turbulence, which is used for mixing material A and material B.

[0036] It should be noted that in the present invention, material A and material B are two materials with relatively large mixing ratios and relatively high mixing requirements. For example, material A is fermentation liquid, and material B is liquid alkali, the purpose of which is to adjust the pH of the fermentation liquid.

[0037] For the convenience of description, material A and material B are still used for illustration below.

[0038] The venturi interface mixer in the utility model comprises a first pipeline 10 and a second pipeline 20, wherein the first pipeline 10 is used to transport material A, and the first pipeline 10 is provided with branch pipes 11 and a first venturi tube 12 arranged at intervals along the flow direction of material A, and the second pipeline 20 is used to transport material B and a second venturi tube 21 is provided on the second pipeline 20;

[0039] One end of the branch pipe 11 is connected to the first pipeline 10, and the other end is connected to the throat section of the second venturi tube 21, so as to transport part of the material A in the first pipeline 10 to the throat section of the second venturi tube 21, and the second pipeline 20 is connected to the throat section of the first venturi tube 12, so as to transport the mixture of the material B and part of the material A to the throat section of the first venturi tube 12;

[0040] An impeller assembly 40 is disposed at the discharge end of the branch pipe 11 and / or the discharge end of the second pipeline 20 .

[0041] In the utility model, the venturi tube is a common device for measuring the flow rate of a fluid in a pipeline, which usually has a throat section, a contraction section arranged at the inlet end of the throat section, and a divergence section arranged at the outlet end of the throat section; when the fluid flows through the venturi tube, the fluid is accelerated in the contraction section and the throat section, resulting in a decrease in static pressure, thereby generating low pressure in the throat section.

[0042] In the pipeline material mixing device provided by the utility model, by arranging the second venturi tube 21 on the second pipeline 20, when the material B flows through the contraction section and the throat section of the second venturi tube 21, the material B is accelerated and generates low pressure, and the low pressure can suck part of the material A from the first pipeline 10 in the branch pipe 11 into the second venturi tube 21, so as to achieve a primary mixing of part of the material A and the material B; similarly, when the remaining material A in the first pipeline 10 flows through the contraction section and the throat section of the first venturi tube 12, the remaining material A is accelerated and generates low pressure, and the low pressure can suck the mixture of material B and part of the material A in the second pipeline 20 into the first venturi tube 12, so as to achieve a secondary mixing of the material A and the material B.

[0043] It can be seen that the pipeline material mixing device provided by the utility model realizes the double mixing of material A and material B, effectively improves the mixing effect of material A and material B, the device is simple and the effect is obvious; further, in the utility model, the impeller assembly 40 arranged at the discharge end of the branch pipe 11 can disturb part of the material A that is about to enter the second venturi tube 21, so as to improve the mixing effect of this part of the material A and material B through the second venturi tube 21; similarly, the impeller assembly 40 arranged at the discharge end of the second pipeline 20 can disturb the mixture of material B and part of the material A that is about to enter the first venturi tube 12, so as to improve the mixing effect of the material B and the remaining material A through the first venturi tube 12. Compared with the scheme of introducing structural elements such as porous plates and special-shaped plates in the existing pipeline material mixing device, the impeller assembly 40 arranged in the utility model generates less resistance to the fluid. Therefore, the Venturi interface mixer based on dispersed turbulence provided by the utility model can effectively reduce the energy loss of the material while ensuring efficient mixing of the material.

[0044] It should be noted that, in the present invention, the impeller assembly 40 is independently arranged in the branch pipe 11 and the second pipe 20, and its specifications and dimensions are adaptively selected according to the installation position; for example, the impeller assembly 40 is arranged at the discharge end of the branch pipe 11 and the impeller assembly 40 is not arranged at the discharge end of the second pipe 20, or the impeller assembly 40 is arranged at the discharge end of the second pipe 20 and the impeller assembly 40 is not arranged at the discharge end of the branch pipe 11; or Figure 1 As shown, an impeller assembly 40 is respectively provided at the discharge end of the branch pipe 11 and the discharge end of the second pipeline 20 .

[0045] It should be noted that, in the present invention, the rotational power of the impeller assembly 40 comes from the material in the branch pipe 11 or the second pipe 20. The impeller assembly 40 can be arranged in any appropriate form, as long as it can minimize the energy loss of the material and be driven to rotate to stir the material. In some embodiments, the impeller assembly 40 includes a support rod 41, an impeller shaft 42 and an impeller blade 43. The impeller shaft 42 is rotatably arranged at the center of the lumen of the branch pipe 11 and / or the second pipe 20 through the support rod 41, and the rotation center line of the impeller shaft 42 coincides with the center line of the branch pipe 11 or the second pipe 20 along their respective length directions;

[0046] A plurality of impeller blades 43 are provided, and the plurality of impeller blades 43 are spaced apart along the circumference of the impeller shaft 42 , so as to stir and disperse the material in the branch pipe 11 or the second pipeline 20 when the impeller shaft 42 rotates.

[0047] In the present invention, the support rod 41 mainly plays a supporting role, and is used to install the impeller shaft 42 at the center of the lumen of the branch pipe 11 or the second pipe 20. In order to ensure the structural stability of the impeller shaft 42, a plurality of support rods 41 are provided, and the plurality of support rods 41 are arranged at intervals along the circumference of the impeller shaft 42. For example, two, three or four support rods 41 are provided.

[0048] See also Figure 3 Taking the impeller assembly 40 installed at the discharge end of the branch pipe 11 as an example, four support rods 41 are provided, and the four support rods 41 are arranged at intervals along the circumference of the impeller shaft 42. One end of each support rod 41 is fixed on the inner wall of the branch pipe 11, and the other end extends along the radial direction of the branch pipe 11 to the center of the tube cavity of the branch pipe 11 and the impeller shaft 42 is installed at the end through a bearing, and the impeller shaft 42 can rotate freely.

[0049] In the present invention, the impeller blades 43 are mainly used to stir the material flowing through the impeller assembly 40. The present invention does not specifically limit the number of the impeller blades 43. Exemplarily, the impeller blades 43 are set to two, three, four or five.

[0050] In some embodiments, the surface of the impeller blade 43 forms an angle with the material flow direction in the branch pipe 11 or the second pipe 20; Figure 3 The top view of the impeller assembly 40 is provided, and the flow direction of the material is perpendicular to the paper surface and inward. When the material flows through the impeller assembly 40, the component force generated by hitting the impeller blades 43 pushes the impeller shaft 42 to rotate in the clockwise direction, thereby driving the impeller blades 43 to stir the material.

[0051] It can be understood that the larger the angle formed by the impeller blade 43 and the material flow direction, the greater the energy loss to the material. When the angle formed by the impeller blade 43 and the material flow direction is too small, the component force generated by the material impacting the impeller blade 43 is insufficient to drive the impeller shaft 42 to rotate. In some embodiments, the angle formed by the impeller blade 43 and the material flow direction is 10-15°.

[0052] In some embodiments, in order to reduce the energy loss caused by the support rod 41 to the material, the cross section of the support rod 41 is set to be sharp-angled in the direction of the incoming material side of the branch pipe 11 or the second pipeline 20. Exemplarily, the cross section of the support rod 41 is triangular, and its sharp corner faces the incoming material side, which can effectively reduce the contact area between the support rod 41 and the material, and reduce the energy loss of the material flowing through the impeller assembly 40.

[0053] In some embodiments, the branch pipe 11 is provided with a first valve 111, and the first valve 111 is used to adjust the flow rate of the material A in the branch pipe 11. Figure 1 As shown, the pressure of material A in the first pipeline 10 located in the upstream section of the branch pipe 11 is P1, and the pressure of the material in the throat section of the second venturi tube 21 is P3. In actual operation, the incoming pressure of material A and material B and the opening of the first valve 111 should be controlled to make P1 greater than P3.

[0054] In some embodiments, a second valve 22 is provided on the second pipeline 20 located downstream of the second venturi tube 21, and the second valve 22 is used to adjust the flow rate of the mixture of material B and part of material A. Figure 1 As shown, the pressure of the material in the throat section of the first venturi tube 12 is P2. By setting a second valve 22 on the second pipeline 20 to adjust the flow rate of the mixture of material B and part of material A, P2 is made the lowest pressure point, and then the mixture of material B and part of material A can be mixed for the second time with the remaining material A in the first pipeline 10 in the throat section of the first venturi tube 12.

[0055] In some embodiments, the inner diameter of the second pipeline 20 is smaller than the inner diameter of the first pipeline 10. Thus, in the final mixture, the proportion of the material A transported by the first pipeline 10 is greater than that of the material B transported by the second pipeline 20.

[0056] In the present invention, in order to further improve the mixing effect of material A and material B, a spiral conduit 30 is obliquely connected to the first pipeline 10 between the branch pipe 11 and the first venturi tube 12, and the spiral conduit 30 is used to pass compressed gas into the first pipeline 10. It can be understood that the compressed gas spirally advances under the constraint of the spiral conduit 30, and is mixed into the remaining material A after entering the first pipeline 10, thereby strengthening the turbulent effect of the remaining material A, so that the remaining material A can be efficiently mixed with the mixture of material B and part of material A.

[0057] It should be noted that, in the present invention, the compressed gas may be any appropriate type of gas. In order to avoid unnecessary reactions with material A and / or material B that may cause changes in the physical properties of material A and / or material B, the compressed gas is an inert gas. For example, the compressed gas is nitrogen.

[0058] In the utility model, the spiral conduit 30 can form any appropriate angle with the first pipeline 10 so as to be able to introduce compressed gas into the first pipeline 10 and enhance the turbulent effect of the remaining material A in the first pipeline 10. It can be understood that in order to avoid the impact of compressed gas and the remaining material A causing energy loss, the spiral conduit 30 forms an angle α with the upstream section of the first pipeline 10. Furthermore, in some embodiments, the angle between the spiral conduit 30 and the upstream section of the first pipeline 10 is less than or equal to 30°.

[0059] In some embodiments, the cross-sectional area of ​​the spiral conduit 30 gradually decreases in the direction toward the air flow outlet. It can be understood that, through the above-mentioned structural arrangement, the compressed gas is further compressed during the process of being introduced into the first pipeline 10 .

[0060] In the present invention, in order to ensure that the compressed gas can spirally advance in the process of passing through the spiral conduit 30, at least three spiral ribs 31 are provided on the inner wall of the spiral conduit 30, and the at least three spiral ribs 31 are respectively extended along the length direction of the spiral conduit 30. Figure 2 As shown, three spiral ribs 31 are arranged on the inner wall of the spiral conduit 30 , and the three spiral ribs 31 are respectively extended along the length direction of the spiral conduit 30 .

[0061] In some embodiments, the cross section of each spiral rib 31 is triangular.

[0062] In the present invention, in order to enhance the disturbing effect of the spiral ribs 31 on the compressed air in the spiral conduit 30, the twisting angle of each spiral rib 31 is 90°-1080°.

[0063] More preferably, the twisting angle is 180°-360°; for example, the twisting angle of each spiral rib 31 is 180°, 210°, 240°, 270°, 300°, 330° or 360°.

[0064] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited thereto. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations. However, these simple modifications and combinations should also be regarded as the contents disclosed by the present invention and belong to the protection scope of the present invention.

Claims

1. A Venturi interface mixer based on dispersed turbulence, characterized in that: The Venturi interface mixer includes: A first pipeline (10), the first pipeline (10) is used to transport material A, and the first pipeline (10) is provided with branch pipes (11) and a first venturi tube (12) arranged at intervals along the flow direction of the material A; and A second pipeline (20), the second pipeline (20) is used to transport material B, and a second venturi tube (21) is provided on the second pipeline (20); One end of the branch pipe (11) is connected to the first pipeline (10), and the other end is connected to the throat section of the second venturi tube (21) for conveying part of the material A in the first pipeline (10) to the throat section of the second venturi tube (21); the second pipeline (20) is connected to the throat section of the first venturi tube (12) for conveying a mixture of material B and part of the material A to the throat section of the first venturi tube (12); The discharge end of the branch pipe (11) and / or the discharge end of the second pipeline (20) is provided with an impeller assembly (40).

2. The Venturi interface mixer based on dispersed turbulence according to claim 1, characterized in that: The impeller assembly (40) comprises a support rod (41), an impeller shaft (42) and an impeller blade (43); the impeller shaft (42) is rotatably arranged at the center of the lumen of the branch pipe (11) and / or the second pipe (20) through the support rod (41), and the rotation centerline of the impeller shaft (42) coincides with the centerline of the branch pipe (11) or the second pipe (20) along their respective length directions; A plurality of impeller blades (43) are provided, and the plurality of impeller blades (43) are arranged at intervals along the circumference of the impeller shaft (42) so as to stir and disperse the material in the branch pipe (11) or the second pipe (20) when the impeller shaft (42) rotates.

3. The Venturi interface mixer based on dispersed turbulence according to claim 2, characterized in that: The surface of the impeller blade (43) forms an angle with the material flow direction in the branch pipe (11) or the second pipe (20); and / or The cross section of the support rod (41) is arranged to be in a pointed shape in the direction of the incoming material side of the branch pipe (11) or the second pipe (20).

4. The Venturi interface mixer based on dispersed turbulence according to claim 1, characterized in that: The branch pipe (11) is provided with a first valve (111), and the first valve (111) is used to adjust the flow rate of the material A in the branch pipe (11); and / or A second valve (22) is provided on the second pipeline (20) downstream of the second venturi tube (21), and the second valve (22) is used to adjust the flow rate of the mixture of material B and part of material A.

5. The Venturi interface mixer based on dispersed turbulence according to claim 1, characterized in that: The inner diameter of the second pipe (20) is smaller than the inner diameter of the first pipe (10).

6. The Venturi interface mixer based on dispersed turbulence according to any one of claims 1 to 5, characterized in that: A spiral conduit (30) is obliquely connected to the first pipeline (10) between the branch pipe (11) and the first venturi tube (12), and the spiral conduit (30) is used to introduce compressed gas into the first pipeline (10).

7. The Venturi interface mixer based on dispersed turbulence according to claim 6, characterized in that: The angle between the spiral conduit (30) and the upstream section of the first pipeline (10) is less than or equal to 30°; and / or The cross-sectional area of ​​the spiral conduit (30) gradually decreases in the direction toward the air flow outlet.

8. The Venturi interface mixer based on dispersed turbulence according to claim 6, characterized in that: At least three spiral ribs (31) are provided on the inner wall of the spiral conduit (30), and the at least three spiral ribs (31) are respectively extended along the length direction of the spiral conduit (30).

9. The Venturi interface mixer based on dispersed turbulence according to claim 8, characterized in that: The cross section of each spiral rib (31) is triangular.

10. The Venturi interface mixer based on dispersed turbulence according to claim 8 or 9, characterized in that: The twisting angle of each spiral rib (31) is 90°-1080°.

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