A flow disturbance device suitable for hydrogen blending in natural gas pipelines

Abstract

The present application provides a flow disturbance device suitable for hydrogen blending in natural gas pipelines, comprising a mounting part and at least two mixing components; the mixing component comprises a mounting frame and at least two blades, the blades are arranged on the mounting frame at intervals, and the blades are inclined toward the middle of the mounting frame; the mounting frame is connected to the mounting part, and each of the mounting frames is arranged in sequence at intervals along the extension direction of the mounting part; the mounting frame, the blades and at least part of the mounting part are used to be arranged in a natural gas pipeline. The flow disturbance device of the present application can be adapted to existing installed pipelines, without the need to build new pipelines, and the cost of hydrogen blending transportation is lower; it can evenly mix the natural gas and hydrogen transported in the pipeline, solving the problem of uneven mixing of natural gas and hydrogen during the transportation of hydrogen blended natural gas in the prior art.

Description

Technical Field

[0001] The present application relates to gas mixing technology, and in particular to a flow disturbance device suitable for hydrogen blending in natural gas pipelines. Background Art

[0002] With the energy transformation and the improvement of environmental protection requirements, hydrogen energy has attracted widespread attention as a clean and efficient energy source. In order to facilitate the transportation and use of hydrogen energy, existing natural gas pipelines can be used for hydrogen blending and transportation in the existing technology.

[0003] At present, when hydrogen-blended natural gas is transported, hydrogen is directly injected into the natural gas pipeline, and the hydrogen and the natural gas in the natural gas pipeline are transported along the pipeline.

[0004] However, hydrogen and natural gas are prone to uneven mixing in natural gas pipelines. Summary of the invention

[0005] The present application provides a flow disturbance device suitable for hydrogen blending in natural gas pipelines, which is used to solve the problem of uneven mixing of natural gas and hydrogen during hydrogen blending transportation in existing natural gas pipelines.

[0006] The present application provides a flow disturbance device suitable for hydrogen blending in a natural gas pipeline, comprising a mounting part and at least two mixing components;

[0007] The mixing assembly includes a mounting frame and at least two blades, wherein the blades are arranged on the mounting frame at intervals and the blades are inclined toward the middle of the mounting frame;

[0008] The mounting frames are connected to the mounting pieces, and the mounting frames are sequentially spaced apart along the extending direction of the mounting pieces;

[0009] The mounting frame, the blades and at least a portion of the mounting member are used to be arranged in a natural gas pipeline.

[0010] In a possible implementation, the blades in two adjacent mixing assemblies are staggered.

[0011] In a possible implementation, the blade is in the shape of a flat plate or an arc-shaped plate.

[0012] In a possible implementation, the blade has a first end and a second end opposite to each other, and any position between the first end and the second end is connected to the mounting frame, and a width of the blade gradually decreases from the first end to the second end.

[0013] In a possible implementation, the mixing assembly further includes at least two supporting members, and a surface of the blade facing the mounting frame is correspondingly connected to the mounting frame through the supporting members.

[0014] In a possible implementation manner, the distance between two adjacent mounting frames is adjustable.

[0015] In a possible implementation, the mounting member includes an annular baffle and at least one connecting rod.

[0016] The connecting rod is located at one side of the baffle and is connected to the baffle, and the baffle is used to be connected to the pipeline;

[0017] The mounting frame is connected to the connecting rod.

[0018] In a possible implementation, the connecting rod includes a plurality of transition rods, and each of the transition rods is detachably connected in sequence;

[0019] The transition rod is correspondingly connected to the installation frame.

[0020] In a possible implementation manner, at least two connecting pieces are provided on the baffle, and the connecting pieces are used to clamp the baffle in the pipeline.

[0021] In a possible implementation, the connecting member includes a clip or a retractable clip.

[0022] The present application provides a flow disturbance device suitable for hydrogen blending in natural gas pipelines. Multiple mixing components can be detachably inserted into the natural gas pipeline through the mounting parts, which facilitates the installation of the flow disturbance device and the existing natural gas pipeline. The blades arranged on the mixing component can guide the gas close to the inner wall of the pipeline toward the middle of the pipeline, so that the hydrogen in the upper layer can effectively contact the natural gas in the middle and lower layers; the gaps between the blades can cut the gas flowing through, so that the airflow generates turbulent vortices in the pipeline, and the hydrogen and natural gas are contacted and mixed with each other; each mixing component is arranged along the direction of the airflow, and the natural gas and hydrogen transported in the pipeline are continuously disturbed to achieve uniform mixing of the two, so as to solve the problem of uneven mixing of natural gas and hydrogen when hydrogen is blended and transported in the existing natural gas pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 A diagram showing the use status of the spoiler provided in an embodiment of the present application;

[0025] Figure 2 for Figure 1 Schematic diagram of the internal structure;

[0026] Figure 3 A schematic diagram of the structure of the spoiler device provided in an embodiment of the present application;

[0027] Figure 4 Schematic diagram of the structure of the mixing component in the spoiler device provided in the embodiment of the present application Figure 1 ;

[0028] Figure 5 for Figure 4 A schematic diagram of the structure from another perspective;

[0029] Figure 6 for Figure 4 Rear view in;

[0030] Figure 7 A positional relationship diagram of two adjacent mixing components in a spoiler device provided in an embodiment of the present application;

[0031] Figure 8 Schematic diagram of the structure of the mixing component in the spoiler device provided in the embodiment of the present application Figure 2 ;

[0032] Fig. 9 Schematic diagram of the structure of the mixing component in the spoiler device provided in the embodiment of the present application Figure 3 ;

[0033] Fig.10 Schematic diagram of the structure of the mixing component in the spoiler device provided in the embodiment of the present application Figure 4 ;

[0034] Fig.11 Schematic diagram of the structure of the mixing component in the spoiler device provided in the embodiment of the present application Figure 5 ;

[0035] Fig.12 Schematic diagram of the structure of the mixing component in the spoiler device provided in the embodiment of the present application Figure 6 ;

[0036] Fig.13 Schematic diagram of the structure of the mixing component in the spoiler device provided in the embodiment of the present application Figure 7 ;

[0037] Fig.14 Schematic diagram of the structure of the mixing component in the spoiler device provided in the embodiment of the present application Figure 8 ;

[0038] Fig.15 Schematic diagram of the connection structure between the mixing component and the mounting member in the spoiler device provided in the embodiment of the present application Figure 1 ;

[0039] Fig.16Schematic diagram of the connection structure between the mixing component and the mounting member in the spoiler device provided in the embodiment of the present application Figure 2 ;

[0040] Fig.17 Schematic diagram of the connection structure between the mixing component and the mounting member in the spoiler device provided in the embodiment of the present application Figure 3 ;

[0041] Fig.18 for Fig.17 A top view of

[0042] Fig.19 A front view of the connection structure between the connector and the baffle in the spoiler provided in an embodiment of the present application;

[0043] Fig. 20 for Fig.19 A partial side view of

[0044] Fig.21 Another structural schematic diagram of the installation of the connecting member and the baffle in the spoiler device provided in the embodiment of the present application;

[0045] Fig. 22 A diagram showing the relationship between the mixing effects of hydrogen and natural gas when different numbers of mixing components are set in the spoiler provided in an embodiment of the present application.

[0046] Description of reference numerals:

[0047] 100-pipeline;

[0048] 101-flange;

[0049] 200-Mounting parts;

[0050] 201-connecting rod; 2011-locking through hole; 2012-transition rod; 2012A-threaded locking hole; 2012B-connecting hole;

[0051] 202- baffle; 2021- retaining spring; 2022- retaining teeth; 2022A- rubber protrusion; 2023- rotating bolt;

[0052] 203-locking bolt;

[0053] 204-fixing bolt;

[0054] 205-connecting bolt;

[0055] 300-mixing components;

[0056] 301-mounting frame; 3011-fixing hole; 3012-sliding through hole; 3013-slot; 3014-fixing threaded hole;

[0057] 302-support member;

[0058] 303-Leaf.

[0059] The above drawings have shown clear embodiments of the embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the embodiments of the present application in any way, but to illustrate the concepts of the embodiments of the present application for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0060] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0061] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of this application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can, for example, be implemented in an order other than those illustrated or described herein.

[0062] In the embodiments of the present application, the words "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0063] During the transportation of hydrogen-blended natural gas, when the gas in the pipeline is transported at a low flow rate, the natural gas and hydrogen need to travel a distance of about 4,000 times the diameter of the pipeline to achieve uniform mixing. For transportation conditions with higher flow rates, a distance of at least 100 times the diameter of the pipeline is required to achieve uniform mixing of the two gases.

[0064] Before natural gas and hydrogen are evenly mixed, due to the differences in the physical and chemical properties of the two gases, natural gas and hydrogen are stratified in the pipeline, resulting in excessive hydrogen concentration in some locations in the pipeline, and damage to the pipeline steel such as hydrogen embrittlement, hydrogen-induced cracking, and hydrogen bubbling.

[0065] In order to solve the above problems, the hydrogen entering the natural gas pipeline can be quickly mixed with the natural gas in the pipeline to ensure the safety of the natural gas pipeline. The inventor found that by setting a spoiler device in the natural gas pipeline, the natural gas and hydrogen in the pipeline can be quickly mixed. At the same time, the setting of the spoiler device also needs to consider the transportation cost of hydrogen-blended natural gas, make use of the installed pipelines as much as possible, facilitate the transformation of existing natural gas pipelines, avoid the construction of new adapter pipelines, so as to reduce the transportation cost of hydrogen-blended natural gas. To this end, the present application provides the following spoiler device, which is suitable for the hydrogen-blended transportation of existing natural gas pipelines that have been installed and constructed.

[0066] The technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems are described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0067] Reference Figure 1 , Figure 2 , Figure 3 As shown, an embodiment of the present application provides a flow disturbance device suitable for hydrogen blending in a natural gas pipeline, comprising a mounting member 200 and at least two mixing assemblies 300; the mixing assembly 300 comprises a mounting frame 301 and at least two blades 303, the two blades 303 are arranged on the mounting frame 301 at intervals, and the blades 303 are inclined toward the middle of the mounting frame 301; the mounting frame 301 is connected to the mounting member 200, and each mounting frame 301 is arranged in sequence at intervals along the extension direction of the mounting member 200; the mounting frame 301, the blades 303 and at least part of the mounting member 200 are used to be arranged in a natural gas pipeline 100.

[0068] It should be noted that the flow spoiler of the present application is plugged into and matched with the existing natural gas pipeline 100 that has been completed, which is convenient for modifying the existing natural gas pipeline 100, without the need to build other pipelines, and reducing the transportation cost of hydrogen-blended natural gas. At the same time, the entire flow spoiler and pipeline 100 can be detachably connected, which is convenient for inspection and maintenance of the flow spoiler. The position of the flow spoiler in the pipeline 100 can be close to the injection port position of the hydrogen and natural gas pipeline 100, so that the hydrogen and natural gas entering the pipeline 100 can be quickly mixed under the action of the flow spoiler, ensuring the safety of the natural gas pipeline 100.

[0069] It can be understood that the installation frames 301 are plugged into the pipe 100, and each installation frame 301 entering the pipe 100 needs to be distributed along the axial direction of the pipe 100. To facilitate the layout of each installation frame 301, the installation frame 301 is an annular frame, for example, a circular ring frame, a rectangular ring frame, an octagonal ring frame, etc. Each installation frame 301 is distributed at intervals along the hollow direction and fixed to the mounting member 200, then the installation frame 301 is inserted into the pipe 100, and the annular center line of the installation frame 301 is parallel or colinear with the axis of the pipe 100.

[0070] It can be understood that the blades 303 fixed on the mounting frame 301 guide and cut the airflow in the pipeline 100 to achieve the mixing of natural gas and hydrogen. To this end, the mounting frame 301 is provided with inclined blades 303, and the number of blades 303 is at least two, and the two blades 303 need to be spaced apart.

[0071] Specifically, when the mixing assembly 300 is located in the pipeline 100, the blades 303 are inclined toward the downstream of the pipeline 100 according to the flow mode of the fluid in the pipeline 100. When the natural gas and hydrogen flow from one end of the blade 303 to the other end, the inclined blades 303 can guide the hydrogen above the pipeline 100 along the flow direction toward the middle of the pipeline 100, effectively contacting the natural gas below, and achieving the purpose of guiding. While the fluid is guided along the blades 303, it can be cut through the gaps between the blades 303, so that the natural gas and hydrogen flowing through the mixing assembly 300 can be cut and mixed.

[0072] Considering the mixing and cutting effect of the mixing assembly 300 on the gas, when the two blades 303 are fixed in the mounting frame 301, it is necessary to ensure that the two blades 303 are arranged at a relative interval and are relatively inclined. It can be understood that the multiple blades 303 set on the mounting frame 301 are arranged along the ring interval inside the mounting frame 301, so that the multiple blades 303 can form a constriction structure extending toward the downstream of the pipeline 100 (downstream according to the airflow direction). At the same time, the large end of the constriction structure is set close to the inner wall of the pipeline 100, and the small end of the constriction structure is set close to the middle of the pipeline 100.

[0073] Reference Figure 2 As shown, when natural gas and hydrogen enter the pipeline 100 from the left side of the pipeline 100 and flow along the pipeline 100, the two gases flow through the constriction structure, and the two gases will be guided under the action of the constriction structure, and the gas close to the inner wall of the pipeline 100 will be moved toward the middle of the pipeline 100; at the same time, since there are gaps between the blades 303, each gap can cut the airflow passing through, and when the airflow is guided and cut by a limited number of mixing components 300, the natural gas and the natural gas can be quickly mixed, avoiding or reducing the problem of damage to the pipeline 100 caused by the stratified transportation of natural gas and hydrogen in the prior art.

[0074] It is understandable that if one mixing assembly 300 is provided on the flow spoiler, a turbulent vortex is generated after the airflow passes through the mixing assembly 300. The generation of a single vortex makes the mixing effect of hydrogen and natural gas unsatisfactory. However, by using two mixing assemblies 300, at least two turbulent vortices can be generated during the flow of the airflow, so that the mixing effect of natural gas and hydrogen in the pipeline 100 can meet the requirements. For this reason, the flow spoiler is provided with at least two mixing assemblies 300.

[0075] In actual application, pipeline conditions with high flow rate and high hydrogen blending ratio will put forward more stringent requirements on the mixing assembly 300. In order to analyze the influence of different numbers of mixing assemblies 300 on the flow disturbance device on the mixing effect of hydrogen and natural gas, the present application sets flow disturbance devices in pipelines 100 with different inner diameters, and the number of mixing assemblies 300 on each flow disturbance device is different. Hydrogen and natural gas with the same flow rate and the same composition ratio are respectively introduced into different pipelines 100 to test the mixing effect, and the following results are obtained: Fig. 22 Results shown.

[0076] Fig. 22 In the figure, n represents the number of mixing assemblies 300 on the corresponding flow disturbance devices in different pipelines 100, D represents the inner diameter of the pipeline 100 used for the test, COV, and the gas concentration deviation coefficient. The larger the deviation value, the worse the mixing effect of hydrogen and natural gas in the pipeline 100.

[0077] pass Fig. 22 It can be seen from the data in that the greater the number of mixing assemblies 300 of the flow-turbulating device, the better the mixing effect of the natural gas and hydrogen in the pipeline 100.

[0078] In a possible implementation, the blades 303 in two adjacent mixing assemblies 300 are arranged in a staggered manner.

[0079] It is understandable that when the airflow passes through two adjacent mixing assemblies 300, the cutting mode with different directions has a better cutting effect on the airflow. Then the airflow flows through the staggered mixing assemblies 300, and each mixing assembly 300 continuously cuts and stirs the natural gas and hydrogen to achieve continuous and efficient mixing, thereby increasing the mixing effect of the natural gas and hydrogen.

[0080] Specifically, when two adjacent mixing assemblies 300 are installed, one of the mixing assemblies 300 is used as a reference, and the other mixing assembly 300 is rotated along the circumference of its mounting frame 301 by a certain angle to achieve staggered arrangement of the blades 303 in the two adjacent mixing assemblies 300.

[0081] For example, when the blades 303 of two adjacent mixing assemblies 300 are arranged in a staggered manner, Figure 7As shown, each blade 303 of one mixing assembly 300 can respectively cover a plurality of gaps formed by each blade 303 of another mixing assembly 300. This staggered manner can achieve the best mixing effect of natural gas and hydrogen.

[0082] In a possible implementation, the blade 303 is in the shape of a flat plate or an arc-shaped plate.

[0083] Since the annular inner wall structure of the mounting frame 301 can be circular, rectangular, hexagonal, octagonal, etc. Under the premise of ensuring the mixing efficiency of the mixing assembly 300, in order to make the blades 303 and the mounting frame 301 have more combinations to adapt to different mixing scenarios, the blades 303 set in the present application are flat or curved.

[0084] For example, Figure 6 , Fig.11 , Fig.12 , Fig.13 , Fig.14 As shown, when the annular inner wall of the mounting frame 301 is polygonal, in order to facilitate the fixed installation of the mounting frame 301 with a planar inner wall and the blade 303, in this embodiment, the blade 303 is in the shape of a flat plate.

[0085] For example, Fig. 9 , Fig.10 As shown, when the annular inner wall of the mounting frame 301 is circular, in order to facilitate the fixed installation of the mounting frame 301 with the arc-shaped inner wall and the blade 303, in this embodiment, the blade 303 is an arc-shaped plate.

[0086] In a possible implementation, the blade 303 has a first end and a second end opposite to each other, and is connected to the mounting frame 301 at any position between the first end and the second end, and the width of the blade 303 gradually decreases from the first end to the second end.

[0087] It can be understood that the first end and the second end of the blade 303 correspond to the two inclined ends of the blade 303 respectively, and the blade 303 is located inside the mounting frame 301. Then, any position between the first end and the second end of the blade 303 is fixed to the mounting frame 301, and a fixed connection between the blade 303 and the mounting frame 301 can be achieved.

[0088] For example, Figure 4 , Figure 5 As shown, one end of the blade 303 is welded to the annular end surface of the mounting frame 301 , and the other end of the blade 303 is inclined toward the middle of the mounting frame 301 .

[0089] Or, if Figure 8As shown, one side of the blade 303 is welded to the inner wall of the mounting frame 301 through the support 302, so that the blade 303 is tilted and both ends are suspended in the air, one end of the blade 303 is located outside the mounting frame 301, and the other end of the blade 303 is close to the annular center of the mounting frame 301.

[0090] Alternatively, one end of the blade 303 is welded to the annular end surface of the mounting frame 301 , and the other end of the blade 303 is inclined toward the periphery of the mounting frame 301 .

[0091] To facilitate welding of the mounting frame 301 and the blades 303 , the mounting frame 301 and the blades 303 may be made of alloy materials with good strength, such as aluminum alloy, nickel silver, brass, nickel steel plate, and the like.

[0092] The blade 303 and the mounting frame 301 can be fixed together by the above methods.

[0093] It can be understood that the blade 303 is used as a guide plate. When the gas is guided along the blade 303, it moves from the end of the blade 303 close to the inner wall of the pipe 100 (the first end) toward the end of the blade 303 close to the center of the pipe 100 (the second end). At the same time, the airflow is gathered toward the middle of the pipe 100 under the action of each blade 303. Considering the pressure change of the airflow during the guiding process, in order to increase the cutting effect of the mixing assembly 300, the width of the blade 303 is reduced in sequence along its inclination direction.

[0094] For example, Fig. 9 As shown, the blade 303 is a fan-shaped arc plate. Fig.10 From the structure of the blade 303, it can be seen that Fig. 9 In the embodiment, the shape of the gap between the blades 303 is more compatible with the shape of the blades 303. When the natural gas and hydrogen flow through the multiple mixing assemblies 300, each mixing assembly 300 cuts the gas more evenly, which can increase the mixing effect of the two gases.

[0095] For example, Figure 4 , Figure 5 , Figure 6 As shown, the blade 303 is in the shape of an isosceles trapezoidal flat plate. Compared with the curved plate-shaped blade 303, the flat plate-shaped blade 303 has a smaller contact area with the gas when guiding the gas, and is subjected to a smaller impact force. Therefore, when the natural gas and hydrogen are transported at high speed in the pipeline 100, the isosceles trapezoidal flat plate-shaped blade 303 has better stability. For this reason, the isosceles trapezoidal flat plate-shaped blade 303 is used in contrast to the curved plate-shaped blade 303, which can ensure a better mixing effect and ensure the stability of the blade 303 in use.

[0096] In a possible implementation, the mixing assembly 300 further includes at least two support members 302 , and a side of the blade 303 facing the mounting frame 301 is connected to the mounting frame 301 via the support member 302 .

[0097] It can be understood that the number of support members 302 is the same as the number of blades 303, and each support member 302 is used in conjunction with a corresponding blade 303 to fix the blade 303 and the mounting frame 301, or to strengthen the connection strength between the blade 303 and the mounting frame 301.

[0098] For example, Figure 4 As shown, when the first end of the blade 303 is welded to the annular side wall of the mounting frame 301, the support member 302 is disposed between one side of the blade 303 and the inner wall of the mounting frame 301, and is respectively welded to the blade 303 and the mounting frame 301. At this time, the support member 302 is used as a connecting reinforcement member between the blade 303 and the mounting frame 301, thereby improving the impact resistance of the blade 303 and further improving the use stability of the mixing assembly 300.

[0099] like Figure 8 As shown, when the first end and the second end of the blade 303 are respectively suspended, the blade 303 is fixed to the mounting frame 301 through the support member 302. At this time, the support member 302 plays a connecting role. The connection stability between the blade 303 and the mounting frame 301 can be ensured by changing the shape of the support member 302 and the contact area with the blade 303 and the mounting frame 301.

[0100] It can be understood that the support member 302 is made of the same metal material as the blades 303 and the mounting frame 301 , so as to ensure stable welding of the support member 302 , the blades 303 and the mounting frame 301 .

[0101] It can be understood that increasing the contact area between the support member 302 and the blade 303 and the contact area between the support member 302 and the mounting frame 301 can increase the connection stability between the blade 303 and the mounting frame 301. For example, the support member 302 adopts a columnar structure, one end of the columnar structure is a plane or an arc surface adapted to the inner wall of the mounting frame 301, and the other end of the columnar structure is an inclined plane or an inclined arc surface adapted to the side of the blade 303. Alternatively, the support member 302 is configured to have other special-shaped structures that fit the side of the blade 303 and the inner wall of the mounting frame 301.

[0102] During installation, the two ends of the support member 302 are welded to the blade 303 and the installation frame 301 respectively to achieve a stable connection between the blade 303 and the installation frame 301 .

[0103] In one possible implementation, four blades 303 are fixed in the mounting frame 301. The four blades 303 are arranged at intervals along the inner wall of the mounting frame 301. The blades 303 are in the shape of isosceles trapezoidal flat plates. The first end of the blade 303 is welded to an annular side wall of the mounting frame 301, and the second end of the blade 303 is arranged near the middle of the mounting frame 301.

[0104] It can be understood that the use of isosceles trapezoidal flat blades 303 can increase the connection stability between the blades 303 and the mounting frame 301, while also increasing the cutting effect of the mixing assembly 300 on the airflow. At the same time, considering various factors such as the pressure drop of the pipeline 100, the safety of use, and the gas flow rate in the pipeline 100, in order to optimize the mixing effect of the mixing assembly 300, in this embodiment, four blades 303 are set on the mounting frame 301. Correspondingly, in order to facilitate the fixing of the blades 303 of this structure, in this embodiment, the mounting frame 301 is an octagonal ring frame, and the following is obtained: Figure 4 , Figure 5 The structure of the mixing assembly 300 is shown.

[0105] When the mixing assembly 300 of this embodiment is used: when the fluid flows through the trapezoidal blades 303, high-speed flow occurs near the axis of the mounting frame 301, causing some fluid near the blades 303 to separate and tumble, forming a recirculation flow behind the blades 303, and generating large-scale vortices rotating in the opposite direction. On the one hand, the fluid near the axis of the pipeline 100 is transported to the wall of the pipeline 100 under the action of the large-scale vortex, thereby greatly increasing the intensity of radical mixing; on the other hand, the generated large-scale vortex is decomposed into many small-scale vortices, increasing the turbulent energy in the pipeline 100 and strengthening the mixing process.

[0106] In addition, the presence of the trapezoidal blades 303 can change the flow direction and enhance the flow in the turbulent direction, thereby promoting efficient mixing of hydrogen and natural gas.

[0107] The flow disturbance device of the present application is suitable for efficient mixing of natural gas and hydrogen. Compared with the requirement of 95% mixing uniformity in the traditional chemical industry, and the requirement of 98% mixing uniformity proposed by some scholars as the requirement for uniform mixing of natural gas and hydrogen, the flow disturbance device of the present invention can achieve higher mixing requirements for the mixing effect of natural gas and hydrogen. The flow disturbance device of the present application is arranged in the pipeline 100, which can make the mixing uniformity of the natural gas and hydrogen passing through the pipeline 100 reach more than 99%, realizing efficient mixing of the two gases. And this mixing uniformity may not be achieved even after the natural gas and hydrogen flow through the ultra-long pipeline 100.

[0108] In a possible implementation, the distance between two adjacent mounting frames 301 is adjustable.

[0109] The flow spoiler of the present application is used in conjunction with the natural gas pipeline 100 that has been constructed and installed, and the installation conditions of the natural gas pipeline 100 vary with the terrain. According to the terrain changes, the pipeline 100 has at least two installation conditions: horizontal installation and inclined installation. The pressure drop change of the pipeline 100 is different in the two installation conditions. Therefore, if the flow spoiler of the same structure is respectively set in the pipeline 100 in the two installation conditions, there must be a difference in the mixing effect of the natural gas and hydrogen in the two pipelines 100.

[0110] In order to make the flow disturbance device adaptable to pipelines 100 in different installation situations, so as to ensure the mixing effect of natural gas and hydrogen in the pipeline 100. In this embodiment, the distance between two adjacent installation frames 301 is adjustable.

[0111] It can be understood that if the pipeline 100 on which the spoiler device is to be installed is tilted and the airflow direction is from bottom to top, the resistance to the upward transportation of the airflow is greater than the resistance to horizontal transportation. At this time, it is necessary to appropriately increase the spacing between the mixing components 300 to reduce the resistance effect of the spoiler device, so that the spoiler device can adapt to the tilted pipeline 100 and ensure the mixing effect of the spoiler device on the natural gas and hydrogen in the pipeline 100.

[0112] In a possible implementation, the mounting member 200 includes an annular baffle 202 and at least one connecting rod 201 , wherein the connecting rod 201 is located on one side of the baffle 202 and connected to the baffle 202 , and the baffle 202 is used to be connected to the pipeline 100 ; the mounting frame 301 is connected to the connecting rod 201 .

[0113] It can be understood that the structure of the mounting member 200 needs to facilitate the spaced arrangement of multiple mounting frames 301. To this end, the mounting member 200 includes at least one connecting rod 201, and the connecting rod 201 connects multiple mounting frames 301 along the hollow direction of the mounting frame 301, so that the multiple mounting frames 301 are spaced along the length direction of the connecting rod 201. When the connecting rod 201 is inserted into the pipe 100, the connecting rod 201 is arranged along the length direction of the pipe 100, and the multiple mounting frames 301 are spaced along the length direction of the pipe 100, and the blades 303 arranged in the mounting frame 301 are arranged in the pipe 100 according to the preset direction.

[0114] Of course, considering the connection stability between the mounting member 200 and each mounting frame 301, the number of connecting rods 201 can be multiple. Multiple connecting rods 201 are arranged in parallel and distributed along the circumference of the mounting frame 301, and each connecting rod 201 is respectively connected to each mounting frame 301. Multiple connecting rods 201 can increase the connection stability between each mounting frame 301 and the mounting member 200, improve the service life of the spoiler, increase the maintenance cycle, and reduce the maintenance cost.

[0115] The connecting rod 201 can be a round rod, a rectangular rod, a strip rod, etc. The structure and material of the connecting rod 201 can be selected according to its impact resistance, production cost, etc., which is not required in this embodiment.

[0116] It is understandable that the mounting member 200 needs to be detachably connected to the pipeline 100 while connecting each mounting frame 301 to adapt to the installed natural gas pipeline 100. To this end, the present application combines the structural characteristics of the natural gas pipeline 100 and sets a ring-shaped baffle 202 that is adapted to the flange 101 at the end of the pipeline 100. The baffle 202 is fixed to the connecting rod 201, and multiple mounting frames 301 are connected to the connecting rod 201. Then, the baffle 202 is connected to the pipeline 100, and the connection between the entire spoiler device and the pipeline 100 can be achieved.

[0117] For example, Figure 1 , Figure 2 , Figure 3 As shown, the baffle 202 is a circular ring plate, the inner diameter of the baffle 202 is greater than or equal to the inner diameter of the pipeline 100, and the outer diameter of the baffle 202 is less than or equal to the outer diameter of the flange 101 of the pipeline 100; the connecting rod 201 is located on one side of the baffle 202 and is vertically fixed to the baffle 202; the connecting rod 201 is located on the outside of the mounting frame 301 and is welded to the outer wall of the mounting frame 301; and when multiple mounting frames 301 are welded to the connecting rod 201, each mounting frame 301 is welded at an appropriate position on the connecting rod 201. After the mounting frame 301 is fixed to the connecting rod 201, the annular center line of the mounting frame 301 is collinear with the annular center line of the baffle 202.

[0118] During installation, according to the flow mode of the gas in the pipeline 100, multiple installation frames 301 are inserted into the pipeline 100 from one end of the pipeline 100, so that the blades 303 are tilted toward the downstream of the airflow in the pipeline 100; until the side of the baffle 202 where the connecting rod 201 is provided is in contact with the side of the flange 101 of the pipeline 100, the plug-in assembly of the spoiler and the pipeline 100 is completed (such as Figure 1 shown).

[0119] The flange 101 of the pipeline 100 located at the rear of the installation is fixed to the flange 101 of the pipeline 100 , so that the baffle 202 is fixed between the two flanges 101 , thereby realizing a detachable connection between the baffle 202 and the pipeline 100 .

[0120] For example, in addition to being fixed by welding, the connecting rod 201 and the mounting frame 301 may also be connected by sliding relative to each other, so that the distance between two adjacent mounting frames 301 can be adjusted.

[0121] Specifically, Fig.15As shown, the installation frame 301 is provided with sliding through holes 3012 that penetrate along both sides of the annular side wall thereof, and the connecting rod 201 passes through the sliding through holes 3012 to realize the sliding connection between the installation frame 301 and the connecting rod 201. After the installation frame 301 is moved to a suitable position on the connecting rod 201, the installation frame 301 needs to be fixed to the connecting rod 201. To this end, the connecting rod 201 is provided with a plurality of locking through holes 2011 that are arranged at intervals along the length direction thereof, and the installation frame 301 is provided with a fixing hole 3011 that matches the locking through hole 2011, and the fixing hole 3011 communicates with the outside and the sliding through hole 3012.

[0122] During installation, the installation frame 301 is moved to a suitable position along the connecting rod 201. At this time, the fixing hole 3011 and the locking through hole 2011 at the preset position are connected to each other; the fixing hole 3011 and the locking through hole 2011 are fixed by the locking bolt 203 to realize the sliding setting and fixed connection between the installation frame 301 and the connecting rod 201. This connection method between the installation frame 301 and the connecting rod 201 can facilitate the adjustment of the position of each installation frame 301 on the connecting rod 201, and is convenient for adjusting the distance between two adjacent installation frames 301, so that the entire spoiler device can adapt to the natural gas pipeline 100 under different installation conditions.

[0123] The pipeline 100 to which the flow spoiler is plugged is close to the hydrogen injection port, and hydrogen will quickly float up and stratify with the natural gas when entering the natural gas pipeline 100. In order to enable the flow spoiler to quickly mix the natural gas and hydrogen, in this embodiment, the length of the connecting rod 201 is adapted to the length of the pipeline 100 to be assembled.

[0124] When the flow disruptor is inserted into the pipe 100, the position of the first mixing assembly 300 in the fluid transfer direction is as close as possible to the end of the pipe 100 (eg Figure 2 As shown in FIG. 1 ), the hydrogen entering the pipeline 100 can be mixed with the natural gas under the action of the mixing assembly 300 after moving a short transportation distance, thereby further ensuring the safety of the pipeline 100.

[0125] In a possible implementation, the connecting rod 201 includes a plurality of transition rods 2012 , and each transition rod 2012 is detachably connected in sequence; the transition rods 2012 are correspondingly connected to the mounting frame 301 .

[0126] It can be understood that the number of mixing assemblies 300 of the present application is variable, and the distance between each mixing assembly 300 is adjustable. When the connecting rod 201 is installed with the mounting frame 301, in addition to the above embodiment, the connecting rod 201 is an integrated structure, and the structure of this embodiment can also be adopted. The connecting rod 201 is set to a structure composed of multiple transition rods 2012, and the number of transition rods 2012 is one more than the number of mounting frames 301. One transition rod 2012 is fixed to each mounting frame 301, and the remaining transition rod 2012 is fixed to the baffle 202.

[0127] There are many ways to connect the transition bar 2012 to the mounting frame 301. For example, one end of the transition bar 2012 is fixed to the mounting frame 301, and the other end of the transition bar 2012 is detachably connected to the adjacent mounting frame 301, so as to realize the detachable connection of two adjacent transition bars 2012. For another example, the transition bar 2012 passes through the mounting frame 301 and is fixedly connected to the mounting frame 301, and the two ends of the transition bar 2012 are detachably connected to the ends of the adjacent transition bars 2012.

[0128] If the lengths of the transition bars 2012 are different, the distance between two adjacent installation frames 301 can be adjusted by changing the arrangement positions of the installation frames 301. Alternatively, the transition bars 2012 can be divided into two groups, and the transition bars 2012 in each group have the same length. Then, the distance between two adjacent installation frames 301 can be adjusted by changing the arrangement positions of the installation frames 301.

[0129] like Fig.17 , Fig.18 As shown, the transition rod 2012 penetrates the mounting frame 301 and is fixed to the mounting frame 301, and both ends of the transition rod 2012 are provided with connection holes 2012B. Two adjacent transition rods 2012 are in contact, so that the connection holes 2012B provided on the two transition rods 2012 are arranged opposite to each other, and the two connection holes 2012B are fixed by connecting bolts 205 to complete the connection of two adjacent mixing assemblies 300, and the multiple mixing assemblies 300 are connected in sequence to complete the assembly of the connecting rods 201.

[0130] The transition rod 2012 connected to the baffle 202 is located on one side of the baffle 202 and is vertically fixed to the baffle 202. A connecting hole 2012B is provided at the end of the transition rod 2012 away from the baffle 202. The transition rod 2012 and the transition rod 2012 on the adjacent mounting frame 301 are detachably connected in the above-mentioned manner to realize the assembly of multiple mixing components 300, connecting rods 201 and baffles 202.

[0131] like Fig.16As shown, in this embodiment, the transition rod 2012 is located at one side of the mounting frame 301 and fixed to the mounting frame 301, and the other end of the transition rod 2012 is extended along the annular hollow direction of the mounting frame 301. A threaded locking hole 2012A is provided on the transition rod 2012 near its other end; a slot 3013 for plugging and matching with other transition rods 2012 is provided on the mounting frame 301, and the slot 3013 is provided with a fixing threaded hole 3014 arranged in communication.

[0132] When two adjacent mixing assemblies 300 are installed, the transition rod 2012 located at the front installation position is inserted into the slot 3013 of the installation frame 301 located at the rear installation position, so that the threaded locking hole 2012A on the transition rod 2012 is arranged opposite to the fixed threaded hole 3014. Then, the transition rod 2012 is locked and fixed to the installation frame 301 by using the fixing bolt 204, and multiple mixing assemblies 300 are connected in sequence to complete the assembly of the mixing assemblies 300 and the connecting rod 201.

[0133] The transition rod 2012 connected to the baffle 202 is located on one side of the baffle 202 and is vertically fixed to the baffle 202. A slot 3013 is provided at the end of the transition rod 2012 away from the baffle 202, and a fixing threaded hole 3014 is provided in the slot 3013. The transition rod 2012 on the mounting frame 301 adjacent to the baffle 202 is inserted into the transition rod 2012 connected to the baffle 202 and is locked with the fixing bolt 204 to complete the assembly of the plurality of mixing assemblies 300, the connecting rod 201 and the baffle 202.

[0134] In a possible implementation, at least two connectors are provided on the baffle 202 , and the connectors are used to clamp the baffle 202 in the pipeline 100 .

[0135] The baffle plate 202 is used to be connected to the pipeline 100. In addition to the above-mentioned installation method of sticking to the side wall of the flange 101, the baffle plate 202 and the pipeline 100 can also be fixed to the pipeline 100 by a snap-fit ​​method.

[0136] The blocking arrangement of the baffle 202 and the pipeline 100 enables the entire structure of the spoiler to be located inside the pipeline 100 . This method is beneficial to the installation situation where the connection distance between the pipeline 100 and the downstream pipeline 100 is not adjustable.

[0137] In a possible implementation, the connecting member includes a clamping spring 2021 or a retractable clamping tooth 2022 .

[0138] In order to realize the clamping and fixing of the baffle 202 and the pipe 100, the connecting piece can be set to various structures, for example, the connecting piece adopts a wooden plug with a wedge structure. When the baffle 202 is inserted into the pipe 100, a gap is set between the outer wall of the baffle 202 and the inner wall of the pipe 100, and the wooden plug is clamped in the gap. By knocking and moving the wooden plug, the baffle 202 and the pipe 100 can be clamped. Of course, the connecting piece can also adopt the structure of this embodiment.

[0139] like Fig.19 , Fig. 20 As shown, the connecting member is a clip 2021, the baffle 202 is an annular plate structure, and a plurality of clips 2021 are fixed around the outer periphery of the baffle 202. The clip 2021 is made of elastic steel sheet or iron sheet, one end of the clip 2021 is fixed to the baffle 202, and the other end of the clip 2021 is bent toward the side away from the connecting rod 201.

[0140] When the baffle 202 is locked with the pipe 100, the baffle 202 is moved from the downstream of the pipe 100 to the upstream of the pipe 100, and the multiple mixing assemblies 300 are inserted into the pipe 100 until the baffle 202 enters the inner wall of the pipe 100. At this time, the side of the multiple retaining springs 2021 close to the baffle 202 contacts the inner wall of the pipe 100, and as the baffle 202 moves along the pipe 100, the multiple retaining springs 2021 are offset and deformed toward the baffle 202 under the action of external force until the baffle 202 is locked in the pipe 100 and fixed to the pipe 100, completing the installation of the entire spoiler.

[0141] like Fig.21 As shown, the connecting piece is a retractable latch 2022, which is an arc-shaped plate-like structure that is adapted to the inner wall of the pipe 100 and convex outward. A plurality of rubber protrusions 2022A are provided on the outer side of the retractable tooth, and the rubber protrusions 2022A can increase the friction between the latch 2022 and the inner wall of the pipe 100, thereby increasing the connection stability between the baffle 202 and the pipe 100. A rotating bolt 2023 is rotatably connected inside the latch 2022, and the rotating bolt 2023 and the latch 2022 can be rotatably connected by a bearing.

[0142] The baffle plate 202 is a circular plate-shaped structure, and the thickness of the baffle plate 202 is adapted to the diameter of the rotating bolt 2023; a plurality of threaded holes facing the outside are provided on the inner side of the baffle plate 202, and the plurality of threaded holes are arranged along the inner wall of the baffle plate 202; the number of the threaded holes is the same as the number of the latch teeth 2022; the rotating bolt 2023 connected to the latch teeth 2022 is located in the threaded hole at the corresponding position and is threadedly connected to the threaded hole.

[0143] When the baffle 202 is locked with the pipe 100, the baffle 202 is moved from the downstream of the pipe 100 to the upstream of the pipe 100, and the plurality of mixing assemblies 300 are inserted into the pipe 100 until the baffle 202 enters the inner wall of the pipe 100 to a suitable position. The plurality of rotating bolts 2023 are respectively rotated to make the corresponding locking teeth 2022 contact the inner wall of the pipe 100, so as to realize the fixed connection between the baffle 202 and the inside of the pipe 100.

[0144] In order to make the radial movement distance of each rotating bolt 2023 along the pipeline 100 basically consistent and ensure that the center line of the mixing assembly 300 coincides with the axis of the pipeline 100 as much as possible, a color mark can be set on the rotating bolt 2023. By observing the color of the rotating bolt 2023 exposed on the inner side of the baffle 202, the radial movement distance of the rotating bolt 2023 along the pipeline 100 can be judged.

[0145] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the invention disclosed herein. The present application is intended to cover any modification, use or adaptation of the present application, which follows the general principles of the present application and includes common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present application are indicated by the following claims.

[0146] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A flow disturbance device suitable for hydrogen blending in natural gas pipelines, characterized by: It comprises a mounting member (200) and at least two mixing components (300); The mixing assembly (300) comprises a mounting frame (301) and at least two blades (303), wherein the blades (303) are arranged on the mounting frame (301) at intervals, and the blades (303) are inclined toward the middle of the mounting frame (301); The mounting frames (301) are connected to the mounting member (200), and the mounting frames (301) are arranged in sequence and at intervals along the extension direction of the mounting member (200); The mounting frame (301), the blades (303), and at least a portion of the mounting member (200) are used to be arranged in a natural gas pipeline (100); The mounting member (200) comprises an annular baffle (202) and at least one connecting rod (201). The connecting rod (201) is located on one side of the baffle (202) and is connected to the baffle (202); the baffle (202) is used to be connected to the pipeline (100); The installation frame (301) is provided with sliding through holes (3012) extending along both sides of the annular side wall thereof; the connecting rod (201) is provided with a plurality of locking through holes (2011) arranged at intervals along the length direction thereof; the installation frame (301) is provided with a fixing hole (3011) adapted to the locking through hole (2011); the fixing hole (3011) is communicated with the outside and the sliding through hole (3012); the connecting rod (201) passes through the sliding through hole (3012), and the fixing hole (3011) and the locking through hole (2011) are fixed by a locking bolt (203), so as to realize sliding connection between the installation frame (301) and the connecting rod (201); so that the distance between two adjacent installation frames (301) can be adjusted; At least two connecting pieces are provided on the baffle (202), and the connecting pieces are used to clamp the baffle (202) in the pipeline (100); the connecting pieces include a clamping spring (208) or a retractable clamping tooth (211).

2. The flow disturbance device suitable for hydrogen blending in natural gas pipeline according to claim 1, characterized in that: The blades (303) in two adjacent mixing assemblies (300) are arranged in a staggered manner.

3. The flow disturbance device suitable for hydrogen blending in natural gas pipeline according to claim 2, characterized in that: The blades (303) are in the shape of a flat plate or an arc-shaped plate.

4. The flow disturbance device suitable for hydrogen blending in natural gas pipelines according to claim 3 is characterized in that: The blade (303) has a first end and a second end opposite to each other, and is connected to the mounting frame (301) at any position between the first end and the second end, and the width of the blade (303) gradually decreases from the first end to the second end.

5. The flow disturbance device suitable for hydrogen blending in natural gas pipeline according to claim 4 is characterized in that: The mixing assembly (300) further comprises at least two supporting members (302), and a side of the blade (303) facing the mounting frame (301) is connected to the mounting frame (301) via the supporting members (302).

6. The flow disturbance device suitable for hydrogen blending in natural gas pipeline according to claim 1, characterized in that: The mounting member (200) comprises an annular baffle (202) and at least one connecting rod (201). The connecting rod (201) is located on one side of the baffle (202) and is connected to the baffle (202); the baffle (202) is used to be connected to the pipeline (100); The mounting frame (301) is connected to the connecting rod (201).

7. The flow disturbance device suitable for hydrogen blending in natural gas pipeline according to claim 6, characterized in that: The connecting rod (201) comprises a plurality of transition rods (2012), and each of the transition rods (2012) is detachably connected in sequence; The transition rod (2012) is correspondingly connected to the installation frame (301).

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