Rotational flow mixing pipe

Abstract

The utility model relates to the technical field of material mixing, and discloses a rotational flow mixing pipe which comprises a main pipeline, a spiral guide pipe and a Venturi pipe, the spiral guide pipe and the Venturi pipe are sequentially connected to the main pipeline in the material flowing direction; the spiral guide pipe is obliquely arranged on the main pipeline and is used for introducing compressed gas which advances spirally into the main pipeline; and the throat pipe section of the venturi pipe is provided with a feeding hole. According to the cyclone mixing pipe provided by the utility model, more than two materials can be fully mixed, the device is simple, and the effect is obvious; in addition, structural elements such as porous plates and special-shaped plates which can generate resistance to fluid are not introduced into the rotational flow mixing pipe, so that the energy loss of the materials is effectively reduced on the premise of ensuring the material mixing effect.

Description

Technical Field

[0001] The utility model relates to the technical field of material mixing, and particularly relates to a swirl mixing tube. Background Art

[0002] In the related art, pipeline mixers are commonly used for liquid-liquid and liquid-gas mixing in continuous production. Due to advantages such as simple structure and high efficiency, pipeline mixers are widely used in fields such as chemical engineering, biological manufacturing, and environmental protection. However, in cases where the proportion of mixed materials varies greatly and the requirement for mixing uniformity is relatively high, conventional pipeline mixers are difficult to meet the mixing requirements, and the local non-uniformity in the mixed materials will seriously affect the normal progress of subsequent processes, such as the non-uniformity of acid-base adjustment in chemical reactions. For this reason, currently common pipeline mixers generally consist of a pipeline combined with structural elements such as nozzles, eddy chambers, perforated plates, and shaped plates, so that the mixed materials will generate phenomena such as shunting, cross mixing, and reverse swirl during the process of passing through these structural elements, thereby greatly improving the mixing effect between the materials, but this also hinders the normal flow of the materials and reduces the material transmission efficiency. Summary of the Utility Model

[0003] The purpose of the utility model is to solve the problem that in order to improve the mixing effect of materials, existing pipeline mixers add structural elements such as perforated plates and shaped plates, resulting in a large amount of energy loss of the materials and low transmission efficiency. A swirl mixing tube based on a Venturi tube and a spiral conduit is provided. The swirl mixing tube has the advantages of good mixing effect and less energy loss.

[0004] To achieve the above purpose, the utility model provides a swirl mixing tube, which includes: a main pipeline, a spiral conduit, and a Venturi tube; the spiral conduit and the Venturi tube are sequentially connected to the main pipeline along the material flow direction; and the spiral conduit is inclinedly arranged on the main pipeline for introducing compressed gas advancing spirally into the main pipeline; a feed port is opened on the throat section of the Venturi tube.

[0005] Preferably, the included angle between the spiral conduit and the main pipeline is less than or equal to 30°.

[0006] Preferably, the cross-sectional area of the spiral conduit gradually decreases in the direction towards the air flow outlet.

[0007] Preferably, at least three first spiral ribs are provided on the inner wall of the spiral conduit, and the at least three first spiral ribs are respectively arranged along the length direction of the spiral conduit.

[0008] Preferably, the cross-section of each first spiral rib is triangular.

[0009] Preferably, the twisting angle of each first spiral rib is 90° - 1080°.

[0010] Preferably, a second spiral rib is provided in the main pipeline upstream of the venturi tube for guiding the material in the main pipeline to advance spirally, and the spiral direction of the second spiral rib is opposite to that of the first spiral rib.

[0011] Preferably, the feed inlet is externally connected with a second pipeline for conveying other materials into the main pipeline.

[0012] Preferably, a second spiral conduit is obliquely connected to the second pipeline, and the second spiral conduit is used for introducing compressed gas advancing spirally into the second pipeline.

[0013] Preferably, the included angle between the second spiral conduit and the upstream section of the second pipeline is less than or equal to 30°.

[0014] Preferably, the cross-sectional area of the second spiral conduit gradually decreases in the direction towards the air flow outlet.

[0015] Preferably, at least three third spiral ribs are provided on the inner wall of the second spiral conduit, and the at least three third spiral ribs are respectively arranged along the length direction of the second spiral conduit.

[0016] Preferably, the cross-section of each of the third spiral ribs is triangular.

[0017] Preferably, the twisting angle of each of the third spiral ribs is 90° - 1080°.

[0018] Preferably, a fourth spiral rib is provided on the inner wall of the second pipeline for guiding the material in the second pipeline to advance spirally, and the spiral direction of the fourth spiral rib is opposite to that of the third spiral rib.

[0019] Preferably, the inner diameter of the second pipeline is smaller than the inner diameter of the main pipeline.

[0020] Preferably, a discharge branch port is further opened on the main pipeline upstream of the venturi tube;

[0021] A mixing branch pipe is connected between the discharge branch port and the feed inlet. The mixing branch pipe includes: a second pipeline and a branch pipe. A second venturi tube is provided on the second pipeline. One end of the branch pipe is connected to the main pipeline through the discharge branch port, and the other end is communicated to the throat section of the second venturi tube for conveying a part of the material in the main pipeline into the second pipeline.

[0022] Preferably, the discharge branch port is arranged on the main pipeline section upstream of the spiral conduit.

[0023] Preferably, the discharge branch port is arranged on the main pipeline section between the spiral conduit and the venturi tube.

[0024] Preferably, more than one discharge branch port is provided. For example, if more than two are provided, different liquid materials can be introduced through different branch pipes and merged into the second pipeline, so as to realize the mixing of some materials in the main pipeline with various other materials.

[0025] Preferably, a first valve is provided on the branch pipe, and the first valve is used to adjust the flow rate of the material in the branch pipe.

[0026] Preferably, 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 mixed material in the second pipeline.

[0027] In the technical solution provided by the present utility model, by providing a Venturi tube on the main pipeline, when the material in the main pipeline flows through the contraction section and the throat section of the Venturi tube, the material is accelerated and a low pressure is generated. This low pressure can suck other materials entering through the feed port of the throat section of the Venturi tube into the Venturi tube to achieve the mixing of two or more materials; by providing a spiral conduit on the main pipeline upstream of the Venturi tube, the compressed gas spirally advances under the constraint of the spiral conduit and impacts the material therein after entering the main pipeline, making the material disordered before entering the Venturi tube. This disorder effect ensures the efficient mixing of various materials after passing through the Venturi tube.

[0028] The swirl mixing tube provided by the present utility model can achieve the full mixing of two or more materials, and the device is simple and the effect is obvious; in addition, the swirl mixing tube provided by the present utility model does not introduce structural elements such as perforated plates and special-shaped plates that will generate resistance to the fluid, and effectively reduces the energy loss of the material on the premise of ensuring the mixing effect of the material. Description of the Drawings

[0029] Figure 1 is a schematic structural diagram of the first swirl mixing tube provided by the present utility model;

[0030] Figure 2 is a schematic connection structure diagram of the first swirl mixing tube provided by the present utility model and the second pipeline;

[0031] Figure 3 is a schematic connection structure diagram of the second swirl mixing tube provided by the present utility model and the second pipeline;

[0032] Figure 4 is a schematic connection structure diagram of the third swirl mixing tube provided by the present utility model and the second pipeline;

[0033] Figure 5 is a schematic connection structure diagram of the fourth swirl mixing tube provided by the present utility model and the second pipeline;

[0034] Figure 6 It is a schematic cross-sectional view of a spiral conduit provided by the present utility model;

[0035] Figure 7 is Figure 6 a schematic structural view inside the spiral conduit provided.

[0036] Explanation of reference numerals

[0037] 10. Main pipeline; 11. Branch pipeline; 111. First valve; 12. Venturi tube; 20. Second pipeline; 21. Second Venturi tube; 22. Second valve; 30. Spiral conduit; 31. First spiral rib; 40. Second spiral conduit. Detailed implementation manners

[0038] The following will detail the specific implementation manners of the present utility model with reference to the accompanying drawings. It should be understood that the specific implementation manners described herein are only for explaining and illustrating the present utility model and are not used to limit the present utility model.

[0039] It should be noted that in the description of the present utility model, terms such as "first", "second" and the like do not denote any order, quantity or importance, but are only used to distinguish different parts. Words such as "including" or "comprising" mean that the elements before this word cover the elements listed after this word, and do not exclude the possibility of also covering other elements.

[0040] It also should be noted that in the description of the present utility model, unless otherwise clearly defined and limited, the terms "installed", "connected" and "joined" 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 those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. When it is described that a specific device is 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.

[0041] All terms used in the present utility model have the same meanings as those understood by those of ordinary skill in the art to which the present utility model belongs, unless otherwise specifically defined. It should also be understood that terms defined in a general dictionary should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and should not be interpreted in an idealized or overly formal sense, unless clearly defined as such here.

[0042] For technologies, methods and devices known to those of ordinary skill in the relevant fields, detailed discussions may not be made, but in appropriate cases, the technologies, methods and devices should be regarded as part of the specification.

[0043] As described above, in combination with Figure 1 shown, the present utility model provides a swirl mixing tube, comprising: a main pipe 10, a spiral duct 30 and a Venturi tube 12; the spiral duct 30 and the Venturi tube 12 are sequentially connected to the main pipe 10 along the material flow direction; and the spiral duct 30 is obliquely arranged on the main pipe 10 for introducing compressed gas advancing spirally into the main pipe 10; the throat section of the Venturi tube 12 is provided with a feed port for introducing other materials to be mixed.

[0044] As described above, in combination with Figure 2 shown, the present utility model provides a swirl mixing tube for mixing material A and material B.

[0045] It should be noted that in the present utility model, material A and material B are two materials with a relatively large difference in mixing ratio and relatively high mixing requirements. Exemplarily, material A is a fermentation broth, and material B is liquid caustic soda for adjusting the pH of the fermentation broth.

[0046] For the convenience of description below, material A and material B are still used for illustration.

[0047] The swirl mixing tube in the present utility model comprises a main pipe 10, a spiral duct 30 and a Venturi tube 12. The spiral duct 30 and the Venturi tube 12 are sequentially connected to the main pipe 10 along the material flow direction; the main pipe 10 is used for transporting material A, the second pipe 20 is connected to the feed port of the throat section of the Venturi tube 12 for transporting material B, the discharge end of the second pipe 20 is connected to the feed port of the throat section of the Venturi tube 12, and the spiral duct 30 is obliquely connected to the main pipe 10 upstream of the Venturi tube 12. The spiral duct 30 is used for introducing compressed gas advancing spirally into the main pipe 10.

[0048] In the present utility model, a Venturi tube is a common device for measuring the fluid flow rate in a pipeline. It usually has a throat section, a contraction section provided at the inlet end of the throat section, and a diffuser section provided at the outlet end of the throat section; when the fluid flows through the Venturi tube, in the contraction section and the throat section, the fluid is accelerated, resulting in a decrease in static pressure, thereby generating a low pressure in the throat section.

[0049] In the swirl mixing tube provided by the present utility model, by arranging a Venturi tube 12 on the main pipeline 10, when the material A flows through the contraction section and the throat section of the Venturi tube 12, the material A is accelerated and generates a low pressure, and this low pressure can suck the material B in the second pipeline 20 into the Venturi tube 12 to achieve the mixing of the material A and the material B; by arranging a spiral conduit 30 on the main pipeline 10 upstream of the Venturi tube 12, the compressed gas spirally advances under the constraint of the spiral conduit 30, and impacts the material A therein after entering the main pipeline 10, making the material A become disordered before entering the Venturi tube 12, and this disorder effect ensures the efficient mixing of the material A and the material B after passing through the Venturi tube 12.

[0050] The swirl mixing tube provided by the present utility model realizes the full mixing of the material A and the material B, the device is simple and the effect is obvious; in addition, the swirl mixing tube provided by the present utility model does not introduce structural elements such as porous plates and special-shaped plates that will generate resistance to the fluid, and effectively reduces the energy loss of the material on the premise of ensuring the material mixing effect.

[0051] It should be noted that in the present utility model, the compressed gas can adopt any appropriate gas type. In order to avoid unnecessary reactions with the material A and / or the material B, resulting in changes in the physical properties of the material A and / or the material B, the compressed gas is an inert gas. Exemplarily, the compressed gas is nitrogen.

[0052] In the present utility model, the spiral conduit 30 can form an arbitrary appropriate angle with the main pipeline 10, as long as it can introduce the compressed gas into the main pipeline 10 and strengthen the turbulent flow effect of the material A in the main pipeline 10. It can be understood that in order to avoid energy loss caused by the counterflush of the compressed gas and the material A, the spiral conduit 30 forms an angle α with the upstream section of the main pipeline 10. Further, in some embodiments, the angle between the spiral conduit 30 and the upstream section of the main pipeline 10 is less than or equal to 30°.

[0053] In some embodiments, the cross-sectional area of the spiral conduit 30 gradually decreases in the direction towards the air flow outlet; it can be understood that through the above structural setting, the compressed gas is further compressed during the process of being introduced into the main pipeline 10.

[0054] In the present utility model, in order to ensure that the compressed gas can spiral forward during the process of passing through the spiral conduit 30, at least three first spiral ribs 31 are arranged on the inner wall of the spiral conduit 30, and the at least three first spiral ribs 31 respectively extend along the length direction of the spiral conduit 30. As Figure 6 and Figure 7A spiral catheter 30 as shown has six first spiral ribs 31 provided on the inner wall of the spiral catheter 30, and the six first spiral ribs 31 extend along the length direction of the spiral catheter 30 respectively.

[0055] In some embodiments, the cross-section of each of the first spiral ribs 31 is triangular.

[0056] In the present utility model, in order to improve the disturbing effect of the first spiral ribs 31 on the compressed air in the spiral catheter 30, the twist angle of each of the first spiral ribs 31 is 90° - 1080°. Further preferably, it is 180° - 360°; for example, the twist angle of each first spiral rib 31 is 180°, 210°, 240°, 270°, 300°, 330° or 360°.

[0057] In the present utility model, in order to further improve the disorder effect of the material A before entering the venturi tube 12, a second spiral rib is provided in the main pipe 10 upstream of the venturi tube 12. The second spiral rib is used to guide the material A in the main pipe 10 to advance spirally, and the spiral direction of the second spiral rib is opposite to that of the first spiral rib 31. Through the above structural arrangement, the spirally advancing compressed gas is mixed with the spirally advancing material A, making the material A more disordered before entering the venturi tube 12 and further enhancing its mixing effect with the material B through the venturi tube 12.

[0058] It should be noted that the present utility model does not impose special restrictions on the number and specific structural form of the second spiral rib, as long as it can guide the material A to advance spirally, and the present utility model will not elaborate herein.

[0059] In some embodiments, in combination with Figure 3 A swirl mixing tube is provided. A second spiral catheter 40 is obliquely connected to the second pipe 20, and the second spiral catheter 40 is used to introduce spirally advancing compressed gas into the second pipe 20. It can be understood that by introducing the spirally advancing compressed gas into the second pipe 20 through the second spiral catheter 40, the compressed gas is used to disturb the material B so that it can be better mixed with the material A when entering the throat section of the venturi tube 12.

[0060] In the present utility model, the second spiral catheter 40 can form any appropriate angle with the second pipe 20 as long as it can introduce the compressed gas into the second pipe 20 and enhance the turbulent flow effect of the material B in the second pipe 20. It can be understood that in order to avoid energy loss caused by the counterflow of the compressed gas and the material B, the second spiral catheter 40 forms an angle β with the upstream section of the second pipe 20. Further, in some embodiments, the angle between the second spiral catheter 40 and the upstream section of the second pipe 20 is less than or equal to 30°.

[0061] In some embodiments, the cross-sectional area of the second spiral conduit 40 gradually decreases in the direction towards the air flow outlet; it can be understood that through the above structural arrangement, the compressed gas is further compressed during the process of being introduced into the second conduit 20.

[0062] In the present utility model, in order to ensure that the compressed gas can advance spirally during the process of passing through the second spiral conduit 40, at least three third spiral ribs are provided on the inner wall of the second spiral conduit 40, and the at least three third spiral ribs are respectively arranged along the length direction of the second spiral conduit 40;

[0063] In some embodiments, the cross-section of each of the third spiral ribs is triangular.

[0064] In the present utility model, in order to improve the disturbing effect of the third spiral ribs on the compressed air in the second spiral conduit 40, the twisting angle of each of the third spiral ribs is 90° - 1080°. Further preferably 180° - 360°; for example, the twisting angle of each of the third spiral ribs is 180°, 210°, 240°, 270°, 300°, 330° or 360°.

[0065] In the present utility model, in order to further improve the disorder effect of the material B before entering the Venturi tube 12, a fourth spiral rib is provided on the inner wall of the second conduit 20, and the fourth spiral rib is used to guide the material B in the second conduit 20 to advance spirally, and the spiral direction of the fourth spiral rib is opposite to that of the third spiral rib. Through the above structural arrangement, the spirally advancing compressed gas is mixed with the spirally advancing material B, making the material B more disordered before entering the Venturi tube 12, and further strengthening its mixing effect with the material A passing through the Venturi tube 12.

[0066] It should be noted that the present utility model does not impose special restrictions on the number and specific structural form of the fourth spiral rib, as long as it can guide the material B to advance spirally, and the present utility model will not elaborate here.

[0067] In some embodiments, the inner diameter of the second conduit 20 is smaller than the inner diameter of the main conduit 10. Further, in the final mixture, the proportion of the material A conveyed by the main conduit 10 is greater than that of the material B conveyed by the second conduit 20.

[0068] In some embodiments, in combination with Figure 4As shown, a second Venturi tube 21 is provided on the second pipeline 20, and a branch pipe 11 is provided on the main pipeline 10 upstream of the Venturi tube 12. One end of the branch pipe 11 is communicated with the main pipeline 10, and the other end is communicated to the throat section of the second Venturi tube 21 for conveying a part of the material A in the main pipeline 10 to the throat section of the second Venturi tube 21.

[0069] Through the above structural arrangement, 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 a low pressure is generated. This low pressure can suck a part of the material A from the main pipeline 10 in the branch pipe 11 into the second Venturi tube 21 to achieve the primary mixing of a part of the material A and the material B. Similarly, when the remaining material A in the main pipeline 10 flows through the contraction section and the throat section of the Venturi tube 12, the remaining material A is accelerated and a low pressure is generated. This low pressure can suck the mixture of the material B and a part of the material A in the second pipeline 20 into the Venturi tube 12 to achieve the secondary mixing of the material A and the material B. It can be seen that through the above structural arrangement, the swirl mixing tube provided by the present utility model realizes the two - time mixing of the material A and the material B, effectively improves the mixing effect of the material A and the material B, and since no structural elements such as porous plates and special - shaped plates that will generate resistance to the fluid are introduced in the swirl mixing tube, on the premise of ensuring the material mixing effect, the energy loss of the material is effectively reduced.

[0070] It should be noted that in the present utility model, the purpose of the spiral conduit 30 to make the compressed gas spiral forward and enter the main pipeline 10 is to disturb the material A, and by using the mutual mixing of the compressed gas and the material A, the turbulent flow effect of the material A is strengthened. Based on the above design scheme of mixing the material A and the material B twice, as Figure 4 shown, in some embodiments, the spiral conduit 30 is obliquely connected to the main pipeline 10 between the branch pipe 11 and the Venturi tube 12, that is, only the remaining material A after being shunted by the branch pipe 11 is disturbed by the compressed gas.

[0071] Or, as Figure 5 shown, in the preferred scheme, the spiral conduit 30 is obliquely connected to the main pipeline 10 upstream of the branch pipe 11. In this way, the part of the material A shunted to the second Venturi tube 21 for primary mixing with the material B is in a turbulent state, thereby improving the mixing effect of the material B and a part of the material A.

[0072] In some embodiments, a first valve 111 is provided on the branch pipe 11, and the first valve 111 is used to adjust the flow rate of the material A in the branch pipe 11. Combined with Figure 4As shown, the pressure of material A in the main pipeline 10 upstream of the branch pipeline 11 is P1, and the pressure of the material in the throat section of the second Venturi tube 21 is P3. During actual operation, the incoming material pressures of material A and material B and the opening degree of the first valve 111 should be controlled to make P1 greater than P3.

[0073] In some embodiments, 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 a part of material A. Figure 4 As shown, the pressure of the material in the throat section of the Venturi tube 12 is P2. By providing the second valve 22 on the second pipeline 20 to adjust the flow rate of the mixture of material B and a part of material A, P2 is made the lowest pressure point, so that the mixture of material B and a part of material A can be secondarily mixed with the remaining material A in the main pipeline 10 in the throat section of the Venturi tube 12.

[0074] The preferred embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited thereto. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solutions of the present invention. To avoid unnecessary repetition, the present invention will not separately describe various possible combinations. But these simple modifications and combinations should also be regarded as the content disclosed by the present invention and fall within the protection scope of the present invention.

Claims

1. A swirl mixing tube, characterized in that, The cyclone mixing pipe includes: a main pipe (10), a spiral conduit (30) and a Venturi tube (12); the spiral conduit (30) and the Venturi tube (12) are sequentially connected to the main pipe (10) along the material flow direction; and the spiral conduit (30) is inclinedly arranged on the main pipe (10) for introducing compressed gas advancing spirally into the main pipe (10); a feed port is provided at the throat section of the Venturi tube (12).

2. The swirl mixing tube according to claim 1, wherein, The included angle between the spiral conduit (30) and the main pipe (10) is less than or equal to 30°.

3. The swirl mixing tube according to claim 2, wherein, The cross-sectional area of the spiral conduit (30) gradually decreases in the direction towards the air flow outlet.

4. The swirl mixing tube according to claim 1, characterized in that, At least three first spiral ribs (31) are provided on the inner wall of the spiral conduit (30), and the at least three first spiral ribs (31) are respectively arranged along the length direction of the spiral conduit (30).

5. The swirl mixing tube according to claim 4, characterized in that, The cross-section of each first spiral rib (31) is triangular.

6. The swirl mixing tube according to claim 4, characterized in that, The twisting angle of each first spiral rib (31) is 90° - 1080°.

7. The swirl mixing tube according to claim 4, characterized in that, A second spiral rib is provided in the main pipe (10) upstream of the Venturi tube (12), and the spiral direction of the second spiral rib is opposite to the spiral direction of the first spiral rib (31).

8. The swirl mixing tube according to claim 1, characterized in that, The feed port is externally connected to a second pipe (20) for conveying other materials into the main pipe (10).

9. The swirl mixing tube according to claim 8, characterized in that, A second spiral conduit (40) is inclinedly connected to the second pipe (20), and the second spiral conduit (40) is used for introducing compressed gas advancing spirally into the second pipe (20).

10. The swirl mixing tube according to claim 9, characterized in that, The included angle between the second spiral conduit (40) and the upstream section of the second pipe (20) is less than or equal to 30°.

11. The swirl mixing tube according to claim 9, wherein The cross-sectional area of the second spiral conduit (40) gradually decreases in the direction towards the air flow outlet.

12. The swirl mixing tube according to claim 9, characterized in that, At least three third spiral ribs are provided on the inner wall of the second spiral conduit (40), and the at least three third spiral ribs are respectively arranged along the length direction of the second spiral conduit (40).

13. The swirl mixing tube according to claim 12, characterized in that, The cross-section of each third spiral rib is triangular.

14. The swirl mixing tube according to claim 12, wherein The twisting angle of each third spiral rib is 90° - 1080°.

15. The swirl mixing tube according to claim 12, wherein, A fourth spiral rib is provided on the inner wall of the second pipe (20), and the spiral direction of the fourth spiral rib is opposite to the spiral direction of the third spiral rib.

16. The swirl mixing tube according to claim 8, characterized in that, The inner diameter of the second pipe (20) is smaller than the inner diameter of the main pipe (10).

17. The swirl mixing tube according to any one of claims 1-16, characterized in that, A discharge branch port is further provided on the main pipe (10) upstream of the Venturi tube (12); A mixing branch pipe is connected between the discharge branch port and the feed port. The mixing branch pipe includes: a second pipe (20) and a branch pipe (11). A second Venturi tube (21) is provided on the second pipe (20). One end of the branch pipe (11) is communicated with the main pipe (10) through the discharge branch port, and the other end is communicated to the throat section of the second Venturi tube (21) for conveying part of the materials in the main pipe (10) into the second pipe (20).

18. The cyclone mixing tube according to claim 17, characterized in that, The discharge branch port is provided on the main pipe section upstream of the spiral conduit (30).

19. The swirl mixing tube according to claim 17, wherein, The discharge branch port is provided on the main pipe section between the spiral conduit (30) and the Venturi tube (12).

20. The swirl mixing tube according to claim 17, wherein, Two or more discharge branch ports are provided.

21. The swirl mixing tube according to claim 17, wherein, A first valve (111) is provided on the branch pipe (11), and the first valve (111) is used to adjust the flow rate of the material in the branch pipe (11).

22. The swirl mixing tube according to claim 21, characterized in that, A second valve (22) is provided on the second pipe (20) downstream of the second Venturi tube (21), and the second valve (22) is used to adjust the flow rate of the mixed material in the second pipe (20).

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