Rotational flow distributor

Abstract

The invention provides a rotational flow distributor, which comprises a runner pipe, a flow inlet and a flow outlet which are oppositely arranged at the two ends of the runner pipe, and a flow inlet and a flow outlet which are oppositely arranged at the two ends of the runner pipe; the rotational flow structure is arranged in the runner pipe, a plurality of rotational flow channels are arranged in the circumferential direction of the rotational flow structure, the rotational flow channels spirally extend in the direction from the flow inlet to the flow outlet, and the two ends of each rotational flow channel communicate with the flow inlet and the flow outlet correspondingly; the flow limiting structure is arranged in the runner pipe, the flow limiting structure is located on the side, close to the outflow opening, of the rotational flow structure, the flow limiting structure and the rotational flow structure are arranged at an interval, the flow limiting structure is provided with a flow limiting channel, the two ends of the flow limiting channel communicate with the inflow opening and the outflow opening correspondingly, and the flowing area of the flow limiting channel is gradually decreased in the direction from the inflow opening to the outflow opening. By applying the technical scheme provided by the invention, the problem of uneven mixing of materials at the bottom of the reactor in the prior art can be solved.

Description

Technical Field

[0001] This invention relates to the field of distributor technology, and more specifically, to a swirl distributor. Background Technology

[0002] Gas-liquid (slurry) reactions, especially hydrogenation reactions, are common technologies in petrochemical and coal chemical industries, such as hydrocracking, hydrorefining, direct coal liquefaction, and indirect coal liquefaction. In gas-liquid (slurry) reactions, upward-flowing reactors are typically used. An upward-flowing reactor is a novel type of hydrogenation reactor where the feedstock and hydrogen enter the reactor in parallel from the bottom and flow upwards. After the hydrogenation reaction occurs under the action of a catalyst, the reaction products are discharged from the top of the reactor. Since the hydrogen is provided as dissolved hydrogen, to ensure a stable hydrogen partial pressure and hydrogen dissolution rate, the dissolved hydrogen in the liquid phase is always saturated, and a portion of the hydrogen also exists in gaseous form.

[0003] For gas-liquid two-phase mass transfer processes, especially liquid-phase hydrogenation processes where the reaction rate is much higher than the mass transfer rate, the mass transfer rate is the key factor determining the macroscopic reaction rate. Increasing the mass transfer surface area can significantly improve the mass transfer rate. Existing technologies use a gas-liquid distributor to uniformly distribute the gas and liquid phases radially in the reactor, while simultaneously dispersing hydrogen into small bubbles. When the reactants enter the reactor from the bottom, a large amount of material initially mixes within the bottom end cap, resulting in a relatively vigorous reaction. Uneven mixing of materials easily occurs at the bottom of the reactor, leading to localized insufficient hydrogen supply. Under these circumstances, free radicals generated from coal pyrolysis rapidly condense to form semi-coke and coke, causing a decrease in the liquefaction reaction rate and exacerbating coking. Summary of the Invention

[0004] This invention provides a swirl distributor to solve the problem of uneven material mixing at the bottom of reactors in the prior art.

[0005] This invention provides a swirl distributor, comprising: a flow tube having an inlet and an outlet at opposite ends; a swirl structure disposed within the flow tube, the swirl structure having multiple swirl channels arranged circumferentially, the swirl channels extending spirally from the inlet to the outlet, the two ends of the swirl channels being connected to the inlet and the outlet respectively; and a flow-limiting structure disposed within the flow tube, the flow-limiting structure being located on the side of the swirl structure near the outlet and spaced apart from the swirl structure, the flow-limiting structure having a flow-limiting channel, the two ends of the flow-limiting channel being connected to the inlet and the outlet respectively, the flow area of ​​the flow-limiting channel gradually decreasing from the inlet to the outlet.

[0006] Furthermore, the swirl structure includes an inner tube and an outer tube, with the outer tube sleeved outside the inner tube and a gap between them. The two ends of the inner tube are sealed structures. There are multiple swirl guide vanes between the outer tube and the inner tube. The inner tube and the outer tube are fixedly connected by the swirl guide vanes, and a swirl channel is formed between two adjacent swirl guide vanes.

[0007] Furthermore, the difference between the inner diameter of the outer tube and the outer diameter of the inner tube is r, and the difference between the inner diameter of the flow tube and the inner diameter of the flow tube is R, where 1 / 5 ≤ r / R ≤ 1 / 2.

[0008] Furthermore, the exit angle of the swirl guide vane is between 5° and 15°.

[0009] Furthermore, the flow-limiting structure has a flow-limiting pipe section, the inner wall of which is an arc surface, forming a flow-limiting channel.

[0010] Furthermore, the swirl distributor also includes a comb shroud, which is installed at the outlet. The comb shroud includes: a shroud body having a flow-dividing cavity, the outlet being located within the flow-dividing cavity, the shroud body having an open end and a blocking end arranged opposite to each other, the blocking end being spaced apart from the outlet, and the inner wall of the shroud body being circumferentially spaced from the outer wall of the flow pipe; and a first comb cover, which is installed at the open end and sleeved on the outer periphery of the flow pipe, the first comb cover having a plurality of first comb holes.

[0011] Furthermore, the comb shroud also includes a flow guide block, which is disposed inside the shroud and is positioned corresponding to the flow outlet. The side of the flow guide block facing the flow outlet has an arc surface.

[0012] Furthermore, the outer periphery of the guide block has a ring-shaped guide plate, the inner diameter of the guide plate gradually decreases in the direction away from the outlet, and the periphery of the guide plate facing the guide plate has a toothed structure.

[0013] Furthermore, a second comb cover is provided at the outlet, and the comb cover is provided with multiple second comb holes.

[0014] Furthermore, the flow tube also has multiple confluence ports, which are arranged in a ring at intervals on the side wall at one end of the inlet.

[0015] Applying the technical solution of this application, the gas-liquid (slurry) mixture enters the flow pipe from the distribution pipe or distribution plate through the inlet, and then flows towards the outlet. The mixed fluid first passes through the swirling structure, and under the guidance of the swirling channel, the mixed fluid is forcibly swirled. It then flows out of the swirling structure through the tangential outlet of the swirling channel and continues to flow upward in a swirling manner under the action of inertia. Because the swirling structure and the flow-limiting structure are set alternately, after the mixed fluid flows out of the swirling channel, the cross-sectional area of ​​the flow channel increases, the velocity decreases, and a pressure gradient is formed, which performs the first shearing and breaking of the gas. As the mixed fluid continues to flow upward, the flow channel in the flow pipe gradually contracts under the action of the flow-limiting channel, and the flow velocity gradually increases. After passing through the flow-limiting channel, the velocity suddenly decreases, and a pressure gradient is formed again, which performs the second shearing and breaking of the gas, so that the gas and liquid phases in the mixed fluid are uniformly mixed. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0017] Figure 1 A schematic diagram of the structure of a swirl distributor provided in one embodiment of the present invention is shown;

[0018] Figure 2 A schematic diagram of the structure of a swirl distributor provided in yet another embodiment of the present invention is shown;

[0019] Figure 3 A schematic diagram of the swirl structure provided by the present invention is shown;

[0020] Figure 4 A schematic diagram of the structure of a swirl distributor provided in yet another implementable embodiment of the present invention is shown.

[0021] The above figures include the following reference numerals:

[0022] 100. Flow tube; 101. Inlet; 102. Outlet; 110. Second comb cover; 120. Manifold;

[0023] 200. Swirl structure; 201. Swirl channel; 210. Inner tube; 220. Outer tube; 230. Swirl guide vane;

[0024] 300. Flow-limiting structure; 301. Flow-limiting channel;

[0025] 400, shroud; 410, shroud body; 420, first shroud cover; 430, guide block; 440, guide plate. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] like Figure 1 As shown, this embodiment of the invention provides a swirl distributor, which includes a flow pipe 100, a swirl structure 200, and a flow-limiting structure 300. The flow pipe 100 has an inlet 101 and an outlet 102 disposed opposite to each other at both ends. The inlet 101 is located below the distribution plate or inside the distribution pipe. During normal operation, the gas-liquid (slurry) two phases enter the flow pipe 100 through the inlet 101. The swirl structure 200 is disposed inside the flow pipe 100 and has multiple swirl channels 201 arranged circumferentially. The swirl channels 201 extend spirally along the direction from the inlet 101 to the outlet 102. Both ends are connected to the inlet 101 and the outlet 102, respectively; the flow-limiting structure 300 is set inside the flow pipe 100, the flow-limiting structure 300 is located on the side of the vortex structure 200 near the outlet 102, and is spaced apart from the vortex structure 200, the flow-limiting structure 300 has a flow-limiting channel 301, both ends of the flow-limiting channel 301 are connected to the inlet 101 and the outlet 102, respectively, and the flow area of ​​the flow-limiting channel 301 gradually decreases along the direction from the inlet 101 to the outlet 102.

[0028] Applying the technical solution of this application, the gas-liquid (slurry) mixture enters the flow pipe 100 from the distribution pipe or distribution plate through the inlet 101, and then flows towards the outlet 102. The mixed fluid first passes through the swirl structure 200, and under the guidance of the swirl channel 201, the mixed fluid is forcibly swirled, flows out of the swirl structure 200 through the tangential outlet of the swirl channel 201, and continues to flow upward in a swirling manner under the action of inertia. Since the swirl structure 200 and the flow-limiting structure 300 are arranged alternately, after the mixed fluid flows out of the swirl channel 201, the cross-sectional area of ​​the flow channel increases, the velocity decreases, and a pressure gradient is formed, which performs the first shearing and breaking of the gas. As the mixed fluid continues to flow upward, the flow channel in the flow pipe 100 gradually contracts under the action of the flow-limiting channel 301, and the flow velocity gradually increases. After passing through the flow-limiting channel 301, the velocity suddenly decreases, and a pressure gradient is formed again, which performs the second shearing and breaking of the gas, so that the gas and liquid phases in the mixed fluid are uniformly mixed, preventing local hydrogen shortage and coking.

[0029] In some embodiments of this application, when the swirl distributor is installed facing upwards, such as Figure 1 and Figure 3 As shown, the flow pipe 100 can be installed on a distribution plate in the reactor, as in the prior art. The distribution plate has multiple distribution plate through holes, which extend through the upper and lower surfaces. The flow pipe 100 passes through these through holes and is fixedly connected to the hole walls. Each distribution plate through hole contains one flow pipe 100. Alternatively, the flow pipe 100 can be installed on a distribution pipe in the reactor. The distribution pipe can be a distribution ring pipe or a distribution row pipe, with several holes at its top. The inlet 101 at the lower end of the flow pipe 100 is completely submerged in the distribution pipe. The flow pipe 100 is fixedly connected to the hole walls for upward supply of the slurry mixture.

[0030] In some other embodiments of this application, such as Figure 4 As shown, when the cyclone distributor is installed downwards, it can be installed lower and closer to the bottom of the reactor than the distribution plate in a conventional reactor with gas participation. The fluid ejected from the flow pipe 100 will still maintain a swirling flow pattern. On the one hand, this enhances mixing and mass transfer at the bottom of the reactor, preventing coking of the material due to insufficient local gas supply; on the other hand, it purges deposited particles at the bottom of the reactor, preventing sedimentation. In addition, because the distributor is installed closer to the bottom of the reactor, the mixture is first ejected downwards to near the bottom and then flows upwards, increasing the residence time of the mixture in the reactor.

[0031] Reference Figure 3 As shown, the swirling structure 200 includes an inner tube 210 and an outer tube 220. The outer tube 220 is sleeved outside the inner tube 210, and there is a gap between the outer tube 220 and the inner tube 210. The two ends of the inner tube 210 are sealed structures, which can be solid or hollow. Multiple swirling guide vanes 230 are located between the outer tube 220 and the inner tube 210. The inner tube 210 and the outer tube 220 are fixedly connected by the swirling guide vanes 230, and a swirling channel 201 is formed between two adjacent swirling guide vanes 230. With this configuration, the mixed fluid can be swirled by the swirling structure 200, maintaining a spiral flow pattern after exiting the swirling structure 200, thereby shearing and breaking up large bubbles in the mixed fluid.

[0032] In this application, the swirl structure 200 can be a separate internal component, embedded in the flow pipe 100, that is, the outer wall of the outer pipe 220 is in close contact with the inner wall of the flow pipe 100; or it can be connected to the flow pipe 100 by means of flanges, that is, the outer diameter of the swirl structure 200 is equal to that of the flow pipe 100.

[0033] Specifically, the difference between the inner diameter of the outer tube 220 and the outer diameter of the inner tube 210 is r, and the difference between the inner diameter of the outer tube 220 and the inner diameter of the flow tube 100 is R, where 1 / 5 ≤ r / R ≤ 1 / 2. When r / R is less than 1 / 5, that is, the flow area of ​​the vortex channel 201 is too small, it will generate a large flow resistance to the fluid, which is not conducive to the feeding of the distributor; when r / R is greater than 1 / 2, that is, the flow area of ​​the vortex channel 201 is too large, the vortex channel 201 has a poor vortex effect on the fluid, the overall fluid kinetic energy is poor, and the decomposition effect of large bubbles in the fluid is poor. In this application, by setting 1 / 5 ≤ r / R ≤ 1 / 2, the overall flow effect of the distributor and the decomposition effect of bubbles in the fluid can be guaranteed. Specifically, r / R can be 1 / 5, 1 / 4, 1 / 3, or 1 / 2.

[0034] Specifically, the outlet angle of the swirl guide vane 230 is between 5° and 15°. The core function of the swirl guide vane is to create swirl in the fluid and break up bubbles through shear force. If the outlet angle is too small, i.e., the outlet angle of the swirl guide vane 230 is < 5°, the fluid swirl velocity is weak, the shear force is insufficient, and the bubbles cannot be effectively broken up, resulting in insufficient gas-liquid contact. If the outlet angle is too large, i.e., the outlet angle of the swirl guide vane 230 is > 15°, the swirl intensity is too strong, the fluid turbulence in the central tube is violent, and the broken small bubbles are prone to re-aggregate, which reduces the dispersion effect. In this application, by setting the outlet angle of the swirl guide vane 230 between 5° and 15°, the shear efficiency of the swirl channel 201 can be maximized within a given flow channel size to decompose the bubbles. Specifically, the outlet angle of the swirl guide vane 230 can be set to 5°, 10°, or 15°.

[0035] The flow-limiting structure 300 has a flow-limiting section. In some embodiments of this application, the inner wall surface of the flow-limiting section is arc-shaped, forming a flow-limiting channel 301. The continuous and smooth arc surface enables a gradual reduction in the flow area of ​​the flow-limiting channel 301, rather than a sudden contraction. This avoids the generation of eddies or stagnation at the contraction point, prevents small bubbles broken by the swirling channel 201 from coalescing at this point, and allows the fluid velocity to increase steadily, providing a stable velocity basis for the second shearing.

[0036] In other embodiments of this application, the flow-limiting channel 301 may also be a tapered channel.

[0037] Reference Figure 1 and Figure 2As shown, the swirl distributor also includes a comb shroud 400, which covers the outlet 102. The comb shroud 400 includes a shroud body 410 and a first comb cover 420. The shroud body 410 has a flow-dividing cavity, and the outlet 102 is located within the flow-dividing cavity. The shroud body 410 has an open end and a closed end arranged opposite to each other, with a gap between the closed end and the outlet 102. Furthermore, there is a circumferential gap between the inner wall of the shroud body 410 and the outer wall of the flow pipe 100. The first comb cover 420 covers the open end and is fitted around the outer periphery of the flow pipe 100. The first comb cover 420 has multiple first comb holes. By setting the comb hood 400, the mixed fluid flows out of the flow pipe 100 and enters the annular flow channel between the hood 410 and the flow pipe 100. It is discharged into the reactor through multiple first comb holes set on the first comb cover 420. The first comb holes can play a third shearing and breaking action on the mixed fluid and comb the bubbles, while making the mixed fluid evenly distributed in the radial direction of the reactor.

[0038] like Figure 2 As shown, in some feasible embodiments of this application, the comb hood 400 further includes a guide block 430, which is disposed inside the hood body 410 and corresponds to the outlet 102. The side of the guide block 430 facing the outlet 102 is curved. This arrangement serves two purposes: firstly, the guide block 430 can disperse air bubbles, causing the fluid ejected from the top of the flow pipe 100 to first impact the curved surface, thus guiding and dispersing the fluid and reducing bubble aggregation to some extent. Secondly, after the mixture flows out of the flow pipe 100, it first collides with the wall of the curved surface. The fluid velocity gradient near the wall is large, causing the bubbles to be sheared again, which is beneficial for generating smaller bubbles.

[0039] Furthermore, the outer periphery of the flow guide block 430 has a ring-shaped flow guide plate 440. The inner diameter of the flow guide plate 440 gradually decreases in the direction away from the outlet 102, and the periphery of the flow guide plate 440 facing the flow guide plate 440 has a toothed structure. With this configuration, the flow guide plate 440 can guide the fluid, allowing the fluid to flow more smoothly to the first flow guide cover 420, reducing the flow resistance of the fluid. At the same time, the toothed structure can further evenly distribute the fluid, improving the flow guide effect of the first flow guide cover 420.

[0040] like Figure 4 As shown, in other embodiments of this application, when the comb hood 400 is not provided at the outlet 102, a second comb cover 110 can be provided at the outlet 102. The second comb cover 110 is provided at the outlet 102 and has a plurality of second comb holes. Similarly, the second comb holes on the second comb cover can perform a third bubble combing on the fluid, further breaking up and uniformly dispersing the mixed fluid flowing out of the flow pipe 100.

[0041] In this application, the flow pipe 100 also has multiple manifolds 120, which are arranged annularly at intervals on the sidewall of one end of the inlet 101. This arrangement allows the multiple manifolds 120 to collectively increase the flow rate of the fluid flowing into the flow pipe 100, thereby improving the overall flow effect of the distributor.

[0042] This application employs a three-stage synergistic design: a first shearing of bubbles by the swirl guide vane 230, a second shearing by the flow-limiting structure 300, and a third shearing by the comb hood 400. This results in smaller and more uniformly distributed bubble sizes, significantly increased gas-liquid contact area, greatly improved mass transfer efficiency, avoids local hydrogen shortages, ensures uniform distribution of the gas-liquid two-phase fluid, and enhances reaction stability. Simultaneously, it suppresses coking and deposition, extending the equipment's operating cycle. The uniformly dispersed small bubbles prevent material coking caused by localized gas shortages, improving the reaction effect of substances within the distributor.

[0043] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0044] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0045] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms 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 on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0046] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0047] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0048] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A swirl distributor, characterized in that, The swirl distributor includes: A flow tube (100) has an inlet (101) and an outlet (102) disposed opposite to each other at both ends. A swirling structure (200) is disposed inside the flow tube (100). The swirling structure (200) is provided with a plurality of swirling channels (201) in the circumferential direction. The swirling channels (201) extend spirally from the inlet (101) to the outlet (102). The two ends of the swirling channels (201) are respectively connected to the inlet (101) and the outlet (102). A flow-limiting structure (300) is disposed inside the flow pipe (100). The flow-limiting structure (300) is located on the side of the swirling structure (200) near the outlet (102) and is spaced apart from the swirling structure (200). The flow-limiting structure (300) has a flow-limiting channel (301). The two ends of the flow-limiting channel (301) are respectively connected to the inlet (101) and the outlet (102). The flow area of ​​the flow-limiting channel (301) gradually decreases along the direction from the inlet (101) to the outlet (102).

2. The swirl distributor according to claim 1, characterized in that, The swirling structure (200) includes: The inner tube (210) and the outer tube (220) are fitted outside the inner tube (210) and there is a gap between the outer tube (220) and the inner tube (210). The two ends of the inner tube (210) are sealed structures. There are multiple swirl guide vanes (230) between the outer tube (220) and the inner tube (210). The inner tube (210) and the outer tube (220) are fixedly connected by the swirl guide vanes (230). The swirl channel (201) is formed between two adjacent swirl guide vanes (230).

3. The swirl distributor according to claim 2, characterized in that, The difference between the inner diameter of the outer tube (220) and the outer diameter of the inner tube (210) is r, and the difference between the inner diameter of the outer tube (220) and the inner diameter of the flow tube (100) is R, where 1 / 5 ≤ r / R ≤ 1 / 2.

4. The swirl distributor according to claim 2, characterized in that, The exit angle of the swirl guide vane (230) is between 5° and 15°.

5. The swirl distributor according to claim 1, characterized in that, The flow-limiting structure (300) has a flow-limiting pipe section, the inner wall surface of which is an arc surface, and the flow-limiting pipe section forms the flow-limiting channel (301).

6. The swirl distributor according to claim 1, characterized in that, The swirl distributor further includes a comb shroud (400), which is disposed over the outlet (102). The comb shroud (400) includes: The cover (410) has a flow-dividing cavity, the outlet (102) is located in the flow-dividing cavity, the cover (410) has an open end and a blocking end arranged opposite to each other, the blocking end and the outlet (102) are spaced apart, and the inner wall of the cover (410) and the outer wall of the flow pipe (100) are circumferentially spaced apart; The first comb cover (420) is placed over the opening end and is sleeved on the outer periphery of the flow pipe (100). The first comb cover (420) is provided with a plurality of first comb holes.

7. The swirl distributor according to claim 6, characterized in that, The comb hood (400) also includes a flow guide block (430), which is disposed inside the hood body (410). The flow guide block (430) is disposed corresponding to the outlet (102), and the side of the flow guide block (430) facing the outlet (102) is arc-shaped.

8. The swirl distributor according to claim 7, characterized in that, The outer periphery of the flow guide block (430) has an annularly arranged flow guide plate (440), the inner diameter of the flow guide plate (440) gradually decreases in the direction away from the flow outlet (102), and the periphery of the flow guide plate (440) facing the flow guide plate (440) has a toothed structure.

9. The swirl distributor according to claim 1, characterized in that, A second comb cover (110) is provided at the outlet (102), and the second comb cover (110) is provided at the outlet (102), and the comb cover is provided with a plurality of second comb holes.

10. The swirl distributor according to claim 1, characterized in that, The flow tube (100) also has a plurality of manifolds (120), which are arranged in a ring-shaped interval on the side wall at one end of the inlet (101).

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