Flow equalization structure and particle collection device

Abstract

This utility model provides a flow equalization structure and a particle collection device, relating to the field of dust removal equipment technology. It includes an inner cylinder and an outer cylinder. The maximum radial dimension of the inner cylinder is greater than its minimum radial dimension. The top of the inner cylinder is an air inlet, and the side wall of the inner cylinder has a flow-through hole structure with an opening area not less than the area of ​​the air inlet. The outer cylinder is fitted outside the inner cylinder, and its bottom end is an air outlet. A particle collection area for setting up the particle collection structure is formed between the outer and inner cylinders. Based on a non-circular cross-section inner and outer cylinder structure, this utility model achieves uniform airflow distribution at the inlet of the particle collection area by adjusting the area and arrangement of the flow-through holes in the inner cylinder. This not only solves the problem of uneven airflow caused by the non-circular structure but also takes into account the flexibility and engineering adaptability of the equipment layout, making it better suited for the dust-laden flue gas treatment needs under various complex working conditions.

Description

Technical Field

[0001] This utility model relates to the field of dust removal equipment technology, and in particular to a flow equalization structure and a particle collection device. Background Technology

[0002] High-temperature flue gas treatment, especially the separation and capture of particulate matter in high-temperature flue gas, is a common and critical technical problem in various industrial processes. Particularly in mainstream converter steelmaking processes, the flue gas generated during converter smelting is characterized by high temperature, high dust, high velocity, and high CO concentration, while also possessing significant potential for waste heat recovery. Therefore, effective flue gas treatment and waste heat recovery are of paramount importance. In existing technologies, to safely and stably achieve full waste heat recovery from converter flue gas, it is typically necessary to install devices for capturing and separating ignition sources and soot. To ensure effective capture and uniform flow distribution within the device, existing particulate matter capture devices often adopt a circular layout. However, this circular layout requires significant space, necessitating the reservation of space to accommodate the circular structure, resulting in large space requirements and poor layout flexibility, posing considerable difficulties for on-site installation. Therefore, improving the layout flexibility of particulate matter capture devices while ensuring uniform internal airflow has become an urgent technical problem to be solved. Utility Model Content

[0003] In order to overcome the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is to provide a flow uniformity structure and a particle collection device to improve the arrangement flexibility and ensure the uniformity of internal airflow.

[0004] The above-mentioned objective of this utility model can be achieved by the following technical solution: this utility model provides a flow equalization structure, including:

[0005] The inner cylinder has a maximum radial dimension greater than its minimum radial dimension. The top of the inner cylinder is an air inlet. The side wall of the inner cylinder is provided with a flow passage structure, and the opening area of ​​the flow passage structure is not less than the area of ​​the air inlet.

[0006] An outer cylinder is sleeved on the outside of the inner cylinder. The bottom end of the outer cylinder is an air outlet. A particle collection area for setting a particle collection structure is formed between the outer cylinder and the inner cylinder. The particle collection area includes a particle collection area inlet face facing the inner cylinder and a particle collection area outlet face facing the outer cylinder. The particle collection area inlet face is spaced apart from the inner cylinder by a first preset distance, the particle collection area inlet face is spaced apart from the particle collection area outlet face by a second preset distance, and the particle collection area outlet face is spaced apart from the outer cylinder by a third preset distance.

[0007] In a preferred embodiment of the present invention, the inner cylinder includes two rectangular sidewalls spaced apart from each other, and two arc-shaped sidewalls disposed at opposite ends of the two rectangular sidewalls.

[0008] In a preferred embodiment of the present invention, the cross-section of the arc-shaped sidewall is semi-circular.

[0009] In a preferred embodiment of the present invention, the flow passage structure includes a plurality of first flow passages disposed on the rectangular sidewall and a plurality of second flow passages disposed on the arc-shaped sidewall.

[0010] In a preferred embodiment of this utility model, the total area of ​​the two rectangular sidewalls is S1, the total area of ​​the two arc-shaped sidewalls is S2, the total area of ​​each of the first flow holes is S1', the total area of ​​each of the second flow holes is S2', the area of ​​the air inlet is S, and the area of ​​the inlet end face of the particle collection area is Sa, wherein S1'+S2'≥S, (S2' / S2)>((S1'+S2') / Sa)>(S1' / S1).

[0011] In a preferred embodiment of the present invention, the flow equalization structure further includes a plurality of guide tubes disposed between the rectangular sidewall and the inlet end face of the particle collection area, each of the guide tubes being connected to a first flow passage hole.

[0012] In a preferred embodiment of this utility model, the cross-sectional shape of the guide tube matches the first flow hole.

[0013] In a preferred embodiment of this utility model, the shape of the first flow hole is elliptical or circular.

[0014] In a preferred embodiment of the present invention, the guide tube is inclinedly disposed on the rectangular sidewall, the angle between the guide tube and the rectangular sidewall is 10° to 80°, and the length of the guide tube is not greater than half of the first preset distance.

[0015] In a preferred embodiment of the present invention, the first flow passage is rectangular in shape, and the flow equalization structure further includes two guide plates disposed on both sides of each of the first flow passages. The guide plates are inclinedly disposed on the rectangular sidewalls, and the included angle between the guide plates and the rectangular sidewalls is 10° to 80°. The length of the guide plates is not greater than half of the first preset distance.

[0016] In a preferred embodiment of the present invention, the shape of the second flow hole is rectangular, elliptical, or circular.

[0017] This utility model also provides a particle collection device, including the aforementioned flow equalization structure and a particle collection structure, wherein the particle collection structure is disposed in the particle collection area of ​​the flow equalization structure.

[0018] In a preferred embodiment of the present invention, the particle trapping structure includes a plurality of inclined plates.

[0019] The technical solution of this utility model has the following significant beneficial effects:

[0020] The flow equalization structure described in this utility model is based on an inner and outer cylinder structure with a non-circular cross section. By adjusting the area and arrangement of the flow passage holes in the inner cylinder, a uniform distribution of the inlet airflow in the particle collection zone is achieved. This not only solves the problem of uneven airflow caused by the non-circular structure, but also takes into account the flexibility of equipment layout and engineering adaptability, significantly improving the operating efficiency and particle collection performance of the device. It is suitable for dusty flue gas treatment needs under various complex working conditions.

[0021] Specifically, by rationally configuring the opening area of ​​the flow passages, the airflow entering the inner cylinder is effectively diverted and uniformly decelerated as it passes through the flow passage structure. This optimizes the airflow distribution at the inlet face of the particle collection area, improves the uniformity of the airflow within the collection area, and provides stable and uniform flow field conditions for subsequent particle collection. Furthermore, a particle collection area is formed between the outer and inner cylinders. This particle collection area includes an inlet face and an outlet face, maintaining first, second, and third preset distances from the inner and outer cylinders, respectively. By setting reasonable spacing, the airflow has a uniform flow path and particle settling space within the collection area, thereby improving particle collection efficiency and system operational stability. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of this invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely illustrative to aid in understanding the invention and do not specifically limit the shapes and proportions of the components. Those skilled in the art, under the guidance of this invention, can select various possible shapes and proportions to implement this invention according to specific circumstances.

[0024] Figure 1 This is a top sectional view of one embodiment of the flow equalization structure described in this utility model;

[0025] Figure 2 This is a side view of the unfolded structure of one embodiment of the arc-shaped sidewall described in this utility model;

[0026] Figure 3 This is a side view of the unfolded structure of another embodiment of the arc-shaped sidewall described in this utility model;

[0027] Figure 4 This is a top view of the installation structure of one embodiment of the guide tube of this utility model;

[0028] Figure 5 This is a three-dimensional structural diagram of one embodiment of the guide tube of this utility model;

[0029] Figure 6 This is a top view of the installation structure of one embodiment of the guide plate of this utility model.

[0030] The reference numerals in the above figures are as follows:

[0031] 100. Inner cylinder; 111. First flow hole; 112. Second flow hole; 120. Rectangular sidewall; 130. Arc-shaped sidewall;

[0032] 200. Outer cylinder;

[0033] 300. Particle collection area; 310. Inlet face of particle collection area; 320. Outlet face of particle collection area;

[0034] 400. Flow deflector;

[0035] 500. Deflector plate. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0037] Implementation Method 1

[0038] Please refer to the following: Figures 1 to 6As shown, an embodiment of this utility model provides a flow equalization structure, which includes an inner cylinder 100 and an outer cylinder 200. The maximum radial dimension of the inner cylinder 100 is greater than the minimum radial dimension of the inner cylinder 100. The top of the inner cylinder 100 is an air inlet, and the side wall of the inner cylinder 100 is provided with a flow passage structure. The opening area of ​​the flow passage structure is not less than the area of ​​the air inlet. The outer cylinder 200 is sleeved on the outside of the inner cylinder 100, and the bottom end of the outer cylinder 200 is an air outlet. A particle trapping structure is formed between the outer cylinder 200 and the inner cylinder 100. The particle collection area 300 includes a particle collection area inlet end face 310 facing the inner cylinder 100 and a particle collection area outlet end face 320 facing the outer cylinder 200. The particle collection area inlet end face 310 is spaced apart from the inner cylinder 100 by a first preset distance h1, the particle collection area inlet end face 310 is spaced apart from the particle collection area outlet end face 320 by a second preset distance h2, and the particle collection area outlet end face 320 is spaced apart from the outer cylinder 200 by a third preset distance h3.

[0039] Overall, the flow equalization structure is based on an inner and outer cylinder structure with a non-circular cross section. By adjusting the area and arrangement of the flow holes on the inner cylinder 100, the uniform distribution of airflow at the inlet of the particle collection zone is achieved. This not only solves the problem of uneven airflow caused by the non-circular structure, but also takes into account the flexibility of equipment layout and engineering adaptability, significantly improving the operating efficiency and particle collection performance of the device. It can be better suited to the dust-laden flue gas treatment needs under various complex working conditions.

[0040] Specifically, by rationally configuring the opening area of ​​the flow passage structure, the airflow entering the inner cylinder 100 is effectively diverted and uniformly decelerated when passing through the flow passage structure, thereby optimizing the airflow distribution at the inlet end face 310 of the particle collection area, improving the uniformity of the airflow in the collection area, and providing stable and uniform flow field conditions for subsequent particle collection.

[0041] Furthermore, a particle collection area 300 is formed between the outer cylinder 200 and the inner cylinder 100. This particle collection area 300 includes an inlet end face 310 and an outlet end face 320, and maintains first, second, and third preset distances from the inner cylinder 100 and the outer cylinder 200, respectively. By setting a reasonable spacing, the airflow has a uniform flow path and particle settling space within the collection area, thereby improving particle collection efficiency and system operational stability.

[0042] The particle collection area 300 is used to arrange the particle collection structure. The inlet end face 310 of the particle collection area is the end face where the inlet of the particle collection structure is located, and the outlet end face 320 of the particle collection area is the end face where the outlet of the particle collection structure is located.

[0043] In embodiments of this utility model, designers can adjust the specific structures of the inner cylinder 100 and the outer cylinder 200 according to usage needs, and no specific limitations are imposed here. Preferably, as Figure 1 In the embodiment shown, the inner cylinder 100 and the outer cylinder 200 have the same shape and are nested together.

[0044] The inner cylinder 100 has a maximum radial dimension greater than its minimum radial dimension, resulting in a non-circular shape. The outer cylinder 200, following the shape of the inner cylinder 100, is also non-circular. The inner cylinder 100 and outer cylinder 200, in combination, form a non-circular flow distribution structure, greatly improving the shape flexibility of the flow distribution structure and enabling it to meet the layout requirements of different sites.

[0045] Designers can adjust the specific shapes of the inner cylinder 100 and the outer cylinder 200 according to usage needs, without specific limitations. For example, the inner cylinder 100 and the outer cylinder 200 can be set as racetrack-shaped, elliptical, quadrilateral, triangular, polygonal, star-shaped, curved, or irregular shapes, etc.

[0046] In one specific embodiment, the inner cylinder 100 includes two rectangular sidewalls 120 that are spaced apart from each other, and two arc-shaped sidewalls 130 that are disposed at opposite ends of the two rectangular sidewalls 120.

[0047] The inner cylinder 100, which is formed by two rectangular sidewalls 120 and two arc-shaped sidewalls 130, has better structural stability and enhances the adaptability of the inner cylinder 100 structure in non-circular arrangements. It is convenient for on-site layout, improves space utilization, and reduces construction difficulty.

[0048] The outer cylinder 200 and the inner cylinder 100 are respectively set in a racetrack shape. The racetrack-shaped flow distribution structure is easier to set in a narrow area than the circular structure, has better layout flexibility, and can better adapt to the complex environment of the application site.

[0049] Designers can adjust the specific shape of the arc-shaped sidewall 130 according to usage requirements, and no specific limitations are imposed here. Preferably, the cross-section of the arc-shaped sidewall 130 is semi-circular. The semi-circular arc-shaped sidewall 130 has better uniformity and facilitates the equidistant arrangement of the flow holes.

[0050] In the embodiments of this utility model, such as Figure 2 and Figure 3 The embodiment shown includes a plurality of first flow holes 111 disposed on a rectangular sidewall 120 and a plurality of second flow holes 112 disposed on an arc-shaped sidewall 130.

[0051] By setting flow holes with different distribution patterns in different side wall areas, the airflow is more evenly split and decelerated, optimizing the airflow distribution entering the particle collection area 300, effectively improving the air intake uniformity of the inlet end face 310 of the particle collection area, thereby improving the particle collection efficiency and the stability of the device operation.

[0052] Designers can adjust the opening areas of the first flow passage 111 and the second flow passage 112 according to usage needs, without specific limitations. Preferably, the total area of ​​the two rectangular sidewalls 120 is S1, the total area of ​​the two arc-shaped sidewalls 130 is S2, the total area of ​​each first flow passage 111 is S1', the total area of ​​each second flow passage 112 is S2', the area of ​​the air inlet is S, and the area of ​​the inlet end face 310 of the particle collection area is Sa, where S1'+S2'≥S, (S2' / S2)>((S1'+S2') / Sa)>(S1' / S1).

[0053] By rationally setting the ratio between the total area of ​​the flow holes on the rectangular sidewall 120 and the arc-shaped sidewall 130, more precise control of the airflow at the inlet end face 310 of the particle collection area is achieved. This not only ensures that the airflow is effectively diverted and evenly distributed before entering the particle collection area 300, but also optimizes the airflow distribution ratio in different sidewall areas, making the overall flow field more stable, thereby significantly improving the particle collection efficiency and the reliability of the device operation.

[0054] In one feasible embodiment of this utility model, such as Figure 4 and Figure 5 The embodiment shown further includes a plurality of guide tubes 400 disposed between the rectangular sidewall 120 and the inlet end face 310 of the particle collection area, each guide tube 400 being connected to a first flow passage 111.

[0055] By setting the guide tube 400, the airflow flowing out from the rectangular sidewall 120 can be further guided, so that the airflow enters the particle collection area 300 more smoothly and evenly, effectively improving the uniformity of airflow distribution at the inlet end face 310 of the particle collection area, and enhancing the particle collection efficiency and the stability of system operation.

[0056] Specifically, the cross-sectional shape of the guide tube 400 matches the first flow passage 111. By matching the cross-sectional shape of the guide tube 400 with the first flow passage 111, the smoothness of the airflow when entering the guide tube 400 from the first flow passage 111 is ensured, turbulence and energy loss are reduced, and the uniformity and stability of the airflow distribution are further improved.

[0057] Designers can adjust the specific shape of the first flow passage 111 according to usage requirements, and no specific limitations are imposed here. In one feasible embodiment, such as Figure 2In the illustrated embodiment, the first flow-through orifice 111 is elliptical in shape. Correspondingly, the cross-sectional shape of the guide tube 400 is elliptical. In another feasible embodiment, the first flow-through orifice 111 is circular in shape. Correspondingly, the cross-sectional shape of the guide tube 400 is circular.

[0058] In the embodiments of this utility model, such as Figure 4 In the embodiment shown, the guide tube 400 is inclinedly disposed on the rectangular sidewall 120, and the included angle α between the guide tube 400 and the rectangular sidewall 120 is 10° to 80°.

[0059] In one specific embodiment, the guide tube 400 is inclined to the rectangular sidewall 120 in the horizontal direction. By inclinedly setting the guide tube 400 on the rectangular sidewall 120, the airflow from the first flow hole 111 can be guided more evenly and smoothly along the guide tube 400 to the inlet end face 310 of the particle collection area. This effectively avoids disturbances and uneven distribution caused by direct airflow, helps to improve the uniformity of airflow distribution and particle collection efficiency, and enhances the adaptability and operational stability of the flow equalization structure to complex airflow conditions.

[0060] Designers can adjust the angle between the guide tube 400 and the rectangular sidewall 120 according to usage requirements; no specific limitations are imposed here. In one feasible embodiment, the angle α between the guide tube 400 and the rectangular sidewall 120 is 10°. In another feasible embodiment, the angle α between the guide tube 400 and the rectangular sidewall 120 is 50°. In yet another feasible embodiment, the angle α between the guide tube 400 and the rectangular sidewall 120 is 80°.

[0061] Of course, in other feasible embodiments, the designer may adjust the tilt direction of the guide tube 400 as needed, without making specific restrictions here.

[0062] In this embodiment of the invention, the length of the guide tube 400 is no greater than half of the first preset distance h1. By ensuring that the length of the guide tube 400 is no greater than half of the first preset distance h1, the size of the guide tube 400 is reasonably controlled while ensuring effective airflow guidance. This avoids increasing airflow resistance or occupying too much internal space due to excessive length of the guide tube 400, thereby improving the overall structural compactness and airflow efficiency. It also helps to optimize the distribution characteristics of the internal flow field, ensuring that the airflow achieves uniform and stable flow before entering the particle collection area 300, thus improving particle collection efficiency and operational reliability.

[0063] During operation of the flow equalization structure, the airflow flows in from the top of the inner cylinder 100, passes through the flow-through hole structure on the inner cylinder 100, enters the particle collection area 300 through the inlet end face 310, and then flows out through the outlet end face 320 of the particle collection area. After reaching the inner side of the outer cylinder 200, the airflow flows downward out of the flow equalization structure. During this process, the airflow is diverted by the flow-through hole structure on the inner cylinder 100, and after being uniformly decelerated, the particles it carries are collected in the particle collection area 300.

[0064] In another feasible embodiment of this utility model, such as Figure 6 In the embodiment shown, the first flow passage 111 is rectangular in shape. The flow equalization structure also includes two guide plates 500 disposed on both sides of each first flow passage 111. The guide plates 500 are obliquely disposed on the rectangular side wall 120. The included angle b between the guide plates 500 and the rectangular side wall 120 is 10° to 80°. The length of the guide plates 500 is not greater than half of the first preset distance h1.

[0065] By setting inclined guide plates 500 on both sides of the rectangular first flow hole 111, the airflow flowing out of the first flow hole 111 can be guided, reducing the generation of turbulence and local vortices, improving the uniformity of airflow distribution, thereby effectively improving particle capture efficiency and system operation reliability.

[0066] Designers can adjust the angle between the guide vane 500 and the rectangular sidewall 120 as needed, without specific limitations. In one feasible embodiment, the angle b between the guide vane 500 and the rectangular sidewall 120 is 10°. In another feasible embodiment, the angle b between the guide vane 500 and the rectangular sidewall 120 is 50°. In yet another feasible embodiment, the angle b between the guide vane 500 and the rectangular sidewall 120 is 80°.

[0067] Furthermore, by ensuring that the length of the guide plate 500 is no greater than half of the first preset distance h1, the size of the guide plate 500 is reasonably controlled while ensuring effective airflow guidance. This avoids increasing airflow resistance or occupying too much internal space due to the excessive length of the guide plate 500, thereby improving the overall structural compactness and airflow efficiency. It also helps to optimize the distribution characteristics of the internal flow field, ensuring that the airflow achieves uniform and stable flow before entering the particle collection area 300, thus improving particle collection efficiency and operational reliability.

[0068] In embodiments of this utility model, designers can adjust the specific shape of the second flow-through hole 112 according to usage needs, and no specific limitations are imposed here. In one feasible embodiment, the shape of the second flow-through hole 112 is rectangular. In another feasible embodiment, the shape of the second flow-through hole 112 is elliptical. In yet another feasible embodiment, the shape of the second flow-through hole 112 is circular.

[0069] Preferably, the shape of the second flow passage 112 is conformal to that of the first flow passage 111, which helps to improve airflow uniformity and reduce manufacturing difficulty.

[0070] Implementation Method 2

[0071] An embodiment of this utility model provides a particle trapping device, which includes a flow equalization structure as described in Embodiment 1 and a particle trapping structure, wherein the particle trapping structure is disposed in the particle trapping area 300 of the flow equalization structure.

[0072] Designers can adjust the specific construction of the particle trapping structure according to usage requirements, and no specific limitations are imposed here. In one feasible embodiment, the particle trapping structure includes multiple inclined plates.

[0073] By setting up a large number of downward-sloping ramps in the particle collection zone, these ramps are arranged in a way that guides the flow of fluid. As the fluid flows, the particles carried by the fluid collide with the ramps and are then separated from the fluid under the action of gravity, thus achieving the effect of particle collection.

[0074] All articles and references disclosed herein, including patent applications and publications, are incorporated herein by reference for various purposes. The term “substantially constitutes…” used to describe a combination should include the identified element, component, part, or step, as well as other elements, components, parts, or steps that do not substantially affect the essential novelty of the combination. The use of the terms “comprising” or “including” to describe combinations of elements, components, parts, or steps herein also contemplates embodiments substantially constituted by such elements, components, parts, or steps. The use of the term “may” herein is intended to indicate that any described attribute “may” include is optional. Multiple elements, components, parts, or steps can be provided by a single integrated element, component, part, or step. Alternatively, a single integrated element, component, part, or step can be divided into multiple separate elements, components, parts, or steps. The disclosure of “a” or “an” used to describe an element, component, part, or step does not imply exclusion of other elements, components, parts, or steps.

[0075] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A current sharing structure, characterized by, include: The inner cylinder has a maximum radial dimension greater than its minimum radial dimension. The top of the inner cylinder is an air inlet. The side wall of the inner cylinder is provided with a flow passage structure, and the opening area of ​​the flow passage structure is not less than the area of ​​the air inlet. An outer cylinder is sleeved on the outside of the inner cylinder. The bottom end of the outer cylinder is an air outlet. A particle collection area for setting a particle collection structure is formed between the outer cylinder and the inner cylinder. The particle collection area includes a particle collection area inlet face facing the inner cylinder and a particle collection area outlet face facing the outer cylinder. The particle collection area inlet face is spaced apart from the inner cylinder by a first preset distance, the particle collection area inlet face is spaced apart from the particle collection area outlet face by a second preset distance, and the particle collection area outlet face is spaced apart from the outer cylinder by a third preset distance.

2. The current sharing structure of claim 1, wherein, The inner cylinder includes two rectangular sidewalls spaced apart from each other, and two arc-shaped sidewalls positioned opposite each other at the ends of the two rectangular sidewalls.

3. The current sharing structure of claim 2, wherein, The cross-section of the arc-shaped sidewall is semi-circular.

4. The flow equalization structure as described in claim 2, characterized in that, The flow passage structure includes a plurality of first flow passages disposed on the rectangular sidewall and a plurality of second flow passages disposed on the arc-shaped sidewall. The first flow passages are elliptical or circular in shape, and the second flow passages are rectangular, elliptical or circular in shape.

5. The current sharing structure of claim 4, wherein, The total area of ​​the two rectangular sidewalls is S1, the total area of ​​the two arc-shaped sidewalls is S2, the total area of ​​each of the first flow holes is S1', the total area of ​​each of the second flow holes is S2', the area of ​​the air inlet is S, and the area of ​​the inlet end face of the particle collection area is Sa, wherein S1'+S2'≥S, (S2' / S2)>((S1'+S2') / Sa)>(S1' / S1).

6. The current sharing structure of claim 4, wherein, The flow equalization structure also includes a plurality of guide tubes disposed between the rectangular sidewall and the inlet end face of the particle collection area, each of the guide tubes being connected to a first flow passage.

7. The current sharing structure of claim 6, wherein, The cross-sectional shape of the guide tube matches the first flow hole.

8. The current sharing structure of claim 6, wherein, The guide tube is inclinedly disposed on the rectangular sidewall, and the angle between the guide tube and the rectangular sidewall is 10° to 80°. The length of the guide tube is not greater than half of the first preset distance.

9. The flow equalization structure as described in claim 4, characterized in that, The first flow passage is rectangular in shape. The flow equalization structure also includes two guide plates disposed on both sides of each first flow passage. The guide plates are inclinedly disposed on the rectangular sidewall. The angle between the guide plate and the rectangular sidewall is 10° to 80°. The length of the guide plate is not greater than half of the first preset distance.

10. A particulate trapping device characterised in that, The system includes a flow equalization structure as described in any one of claims 1 to 9, and a particle trapping structure, wherein the particle trapping structure is disposed in the particle trapping region of the flow equalization structure, and the particle trapping structure includes a plurality of inclined plates.

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