Static rectifying device for hydrogen-doped natural gas

Abstract

The utility model discloses a hydrogen-doped natural gas static rectifying device which comprises a hydrogen injection pipe and a mixing structure, and the hydrogen injection pipe is used for injecting hydrogen into a natural gas pipeline; the mixing structure is used for being arranged in a natural gas pipeline and located on the downstream portion of a hydrogen injection pipe, the mixing structure comprises an outer sleeve and a rectifying plate, the two ends of the outer sleeve are open, the rectifying plate is arranged in an inner cavity of the outer sleeve, and a plurality of flow guide holes are formed in the rectifying plate. The gas mixing device has the beneficial effects that mixed gas is disturbed and drained through the outer sleeve, and the rectifying plate is arranged, so that the mixed gas flowing orderly changes the original flowing direction when colliding with the rectifying plate, impacts with the adjacent mixed gas and is continuously mixed under the action of the rectifying plate, and then natural gas and hydrogen are uniformly mixed; the flow guide holes are formed in the rectifying plate, so that the pressure drop loss caused by the arrangement of a mixing structure in the natural gas pipeline can be effectively reduced.

Description

Technical Field

[0001] The utility model relates to a technology for blending hydrogen into natural gas, in particular to a static rectification device for blending hydrogen into natural gas. Background Art

[0002] Natural gas hydrogen blending technology can improve the utilization rate of hydrogen energy resources and effectively reduce pollutants produced by natural gas combustion. It is of great significance for energy conservation, emission reduction and solving problems such as air pollution. Natural gas and hydrogen are mixed in a natural gas hydrogen blending device.

[0003] Currently, existing natural gas-hydrogen blending devices primarily rely on significantly reducing the cross-sectional area of pipelines to disrupt the airflow and achieve blending of natural gas and hydrogen. However, the limited radial space in natural gas pipelines results in uneven mixing of natural gas and hydrogen. This significant reduction in cross-sectional area also results in significant pressure drop losses in natural gas pipelines, increasing overall energy consumption for natural gas pipeline transportation. Utility Model Content

[0004] The technical problem to be solved by the present utility model is that the existing hydrogen blending device blends hydrogen by significantly reducing the pipeline flow cross-sectional area. Due to the significant reduction in the pipeline flow cross-sectional area, the pressure drop loss of the natural gas pipeline is relatively large. The purpose is to provide a hydrogen-blended natural gas static rectifier device with guide holes on the rectifier plate to reduce the pressure drop loss of the natural gas pipeline.

[0005] The utility model is achieved through the following technical solutions:

[0006] A hydrogen-blended natural gas static rectification device comprises a hydrogen injection pipe and a mixing structure. The hydrogen injection pipe is used to inject hydrogen into a natural gas pipeline; the mixing structure is used to uniformly mix hydrogen with natural gas. In a working state, the mixing structure is installed downstream of the hydrogen injection pipe. The mixing structure comprises an outer sleeve and a rectification plate. Both ends of the outer sleeve are open. The rectification plate is arranged in the inner cavity of the outer sleeve, and the rectification plate is provided with a plurality of guide holes.

[0007] The utility model adopts the above-mentioned scheme, and injects hydrogen into the natural gas pipeline by providing a hydrogen injection pipe, thereby achieving preliminary mixing of hydrogen and natural gas. A mixing structure is then provided in the natural gas pipeline, and the mixing structure is arranged downstream of the hydrogen injection pipe, so that the preliminarily mixed mixed gas enters the inner cavity of the outer sleeve from one end of the outer sleeve, and the mixed gas is disturbed and guided by the outer sleeve. A rectifier plate is also provided in the outer sleeve, so that the orderly flowing mixed gas parts change their original flow direction when they hit the rectifier plate, and impact with adjacent mixed gas, and continuously mix under the action of the rectifier plate, instead of mixing hydrogen and natural gas by significantly reducing the flow cross-sectional area of the pipeline, thereby uniformly mixing the natural gas and hydrogen. A guide hole is also provided on the rectifier plate, which can effectively reduce the pressure drop loss caused by the provision of the mixing structure in the natural gas pipeline, thereby avoiding an increase in the total energy consumption of natural gas pipeline transportation.

[0008] In some embodiments, the rectifier plate is integrally spiral along the length of the natural gas pipeline. Since the gas entering the mixing structure flows in an orderly manner in one direction, the spiral rectifier plate allows the orderly gas flow to change its original flow direction and state upon encountering the rectifier plate. The spiral rectifier plate then continuously changes the flow direction and state of the mixed gas, allowing the mixer to continuously mix the mixed gas and ultimately achieve a uniform mixture.

[0009] In some embodiments, the plurality of rectifier plates are provided, each having a different torsion angle. By providing multiple rectifier plates with different torsion angles, the flow direction and flow state of the mixed gas can be continuously changed, thereby increasing the disturbance effect on the mixed gas and improving the uniformity of the mixed gas.

[0010] In some embodiments, the twisting angle is 15° to 90°. By setting the twisting angle to 15° to 90°, a disturbance effect is generated on the mixed gas, so as to ensure that the mixed gas is mixed evenly.

[0011] In some embodiments, the length of each of the rectifying plates is different. By setting the lengths of the rectifying plates to be different, the flow state of the mixed gas can be continuously changed, the disturbance effect on the mixed gas can be increased, and the uniformity of the mixed gas can be improved.

[0012] In some embodiments, the inlet end cavity of the outer sleeve is provided with a tapered surface, the cross-section of which gradually decreases from the end of the outer sleeve toward the center. The provision of the tapered surface at the inlet end cavity of the outer sleeve facilitates the use of a throttling effect, gradually increasing the flow rate of the natural gas and hydrogen (mixed gas) through the tapered surface, thereby disturbing the mixed gas.

[0013] In some embodiments, the guide holes are perpendicular to the portion of the rectifier plate where the corresponding guide holes are provided. The guide holes are perpendicular to the portion of the rectifier plate where the corresponding guide holes are provided, so that the angles between the guide holes are different, so that the gas exiting the guide holes collides with the adjacent gas, further mixing the mixed gas.

[0014] In some embodiments, the hydrogen injection tube is generally L-shaped, with one end being open and the other end being sealed. The open end is located at the top of the vertical section of the L-shaped tube, and the horizontal section of the L-shaped tube is provided with a through hole, which constitutes a hydrogen jet hole for allowing high-pressure hydrogen to enter the natural gas pipeline. The top of the vertical section of the hydrogen injection tube is provided as an open hole to facilitate the hydrogen injection equipment to fill the hydrogen injection tube with high-pressure hydrogen from the open end. The hydrogen jet hole is provided in the vertical section of the hydrogen injection tube so that the high-pressure hydrogen can be injected into the natural gas pipeline from the hydrogen jet hole, thereby causing initial mixing of the hydrogen with the natural gas in the natural gas pipeline.

[0015] In some embodiments, a plurality of hydrogen jet holes are provided, each located on the sidewall of the horizontal section, with the virtual axis of the jet hole perpendicular to the natural gas flow direction. Since natural gas in a natural gas pipeline flows along the length of the pipeline, the hydrogen jet holes are provided on the sidewall of the horizontal section so that the high-pressure hydrogen ejected from the jet holes is perpendicular to the natural gas flow direction, causing the hydrogen and natural gas to collide and initially mix.

[0016] In some embodiments, the hydrogen jet holes are evenly distributed on the side wall of the horizontal section.

[0017] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0018] 1. An outer casing is set to disturb and guide the mixed gas, and a rectifier plate is set so that each part of the mixed gas flowing in an orderly manner changes its original flow direction when it hits the rectifier plate, and impacts with the adjacent mixed gas. Under the action of the rectifier plate, it is continuously mixed, and then the natural gas and hydrogen are evenly mixed.

[0019] 2. A guide hole is also provided on the rectifier plate, which can effectively reduce the pressure drop loss caused by setting a mixing structure in the natural gas pipeline, thereby avoiding increasing the total energy consumption of natural gas pipeline transportation.

[0020] 3. Setting up multiple rectifier plates with different torsion angles can facilitate the continuous change of the flow direction and flow state of the mixed gas, increase the disturbance effect on the mixed gas, and improve the uniformity of the mixed gas.

[0021] 4. The guide holes are perpendicular to the portion of the rectifier plate where the corresponding guide holes are provided, so that the angles between each guide hole are different, so that the gas coming out of the guide hole collides with the adjacent gas, further mixing the mixed gas.

[0022] 5. The operation method of the device is simple, low-cost, universal, and easy to mass produce. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the accompanying drawings:

[0024] Figure 1 This is a schematic diagram of the working principle of the utility model;

[0025] Figure 2 It is a structural diagram of the utility model;

[0026] Figure 3 This is a structural diagram of the rectifier plate in the utility model;

[0027] Figure 4 This is a structural diagram of the hydrogen injection tube in the utility model;

[0028] Figure 5 It is a structural diagram of the outer sleeve in the utility model.

[0029] Markings and corresponding parts names in the accompanying drawings:

[0030] Hydrogen injection pipe 1, natural gas pipeline 2, outer casing 3, rectifying plate 4, hydrogen jet hole 11, conical surface 31, guide hole 41. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The schematic implementation methods of the present invention and their descriptions are only used to explain the present invention and are not intended to limit the present invention.

[0032] Throughout this specification, references to "one embodiment," "an embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment of the present invention. Therefore, the phrases "one embodiment," "an embodiment," "an example," or "an example" appearing in various places throughout this specification do not necessarily all refer to the same embodiment or example. In addition, the particular features, structures, or characteristics may be combined in one or more embodiments or examples in any suitable combination and / or subcombination. Furthermore, it will be understood by those of ordinary skill in the art that the figures provided herein are for illustrative purposes only and are not necessarily drawn to scale. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0033] In the description of the present invention, the terms "front", "rear", "left", "right", "up", "down", "vertical", "horizontal", "high", "low", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the scope of protection of the present invention.

[0034] The terms "first" and "second" used in this utility model are only used to distinguish corresponding components for the sake of clarity of description and are not intended to limit any order or emphasize importance. In addition, the term "connected" used in this article can refer to direct connection or indirect connection through other components unless otherwise specified.

[0035] This embodiment provides a hydrogen-blended natural gas static rectification device, such as Figure 1-Figure 5 As shown, it includes a hydrogen injection pipe 1 and a mixing structure. The hydrogen injection pipe 1 is used to add hydrogen to the natural gas pipeline 2; the mixing structure is used to be arranged in the natural gas pipeline 2 and is located downstream of the hydrogen injection pipe 1. The mixing structure includes an outer sleeve 3 and a rectifying plate 4. Both ends of the outer sleeve 3 are open. The rectifying plate 4 is arranged in the inner cavity of the outer sleeve 3, and a plurality of guide holes 41 are provided on the rectifying plate 4.

[0036] The outer sleeve 3 disturbs and guides the mixed gas. A rectifier plate 4 is provided inside the outer sleeve 3 so that the orderly flowing mixed gas parts change their original flow direction when hitting the rectifier plate 4 and impact with the adjacent mixed gas. They are continuously mixed under the action of the rectifier plate 4, instead of mixing hydrogen and natural gas by significantly reducing the flow cross-sectional area of the pipeline, and then the natural gas and hydrogen are evenly mixed. A guide hole 41 is also provided on the rectifier plate 4, which can effectively reduce the pressure drop loss caused by setting the mixing structure in the natural gas pipeline 2, thereby avoiding increasing the total energy consumption of the natural gas pipeline 2.

[0037] Since the existing natural gas hydrogen mixing device has a large flow resistance area, the front of the device needs to withstand high pressure impact for a long time, so the material requirements for the device are high (high-strength materials), which increases the manufacturing cost of the device. Figure 1 and Figure 2 The outer sleeve 3 only reduces the inner diameter of the natural gas pipeline 2 by 5% to 8%, and does not significantly reduce the flow cross-sectional area of the natural gas pipeline 2. The outer sleeve 3 does not need to withstand high pressure shock for a long time, which reduces the material requirements for the outer sleeve 3 and reduces the manufacturing cost of the device.

[0038] See also Figures 1 to 3 The rectifier plate 4 is generally spiral-shaped. Since the gas entering the mixing structure flows in an orderly manner in one direction, the spiral-shaped rectifier plate 4 causes the orderly gas flow to change its original flow direction and flow state when encountering the rectifier plate 4. Consequently, the spiral-shaped rectifier plate 4 continuously changes the flow direction and flow state of the mixed gas, causing the mixer to continuously mix the mixed gas and ultimately achieve uniform mixing.

[0039] See also Figures 1 to 3 The rectifier plates 4 include multiple rectifier plates 4, each with a different torsion angle. By providing multiple rectifier plates 4 with different torsion angles, the flow direction and flow state of the mixed gas can be continuously changed, thereby increasing the disturbance effect on the mixed gas and improving the uniformity of the mixed gas.

[0040] See also Figures 1 to 3 The twisting angle is 15° to 90°. By setting the twisting angle to 15° to 90°, a disturbance effect is generated on the mixed gas, so as to ensure that the mixed gas is mixed evenly.

[0041] See also Figures 1 to 3 The lengths of the plurality of rectifying plates 4 are different. By setting the lengths of the plurality of rectifying plates 4 to be different, the flow state of the mixed gas can be continuously changed, the disturbance effect on the mixed gas can be increased, and the uniformity of the mixed gas can be improved.

[0042] See also Figure 1 and Figure 5The inlet end cavity of the outer sleeve 3 is provided with a tapered surface 31, the cross-section of which gradually decreases from the end of the outer sleeve 3 toward the center. The provision of the tapered surface 31 at the inlet end cavity of the outer sleeve 3 facilitates the use of a throttling effect, gradually increasing the flow rate of the natural gas and hydrogen (mixed gas) through the tapered surface 31 and disturbing the mixed gas.

[0043] See also Figure 1 and Figure 2 The guide holes 41 are perpendicular to the portion of the rectifier plate 4 where the corresponding guide holes 41 are provided. The guide holes 41 are perpendicular to the portion of the rectifier plate 4 where the corresponding guide holes 41 are provided, so that the angles between the guide holes 41 are different, so that the gas exiting the guide holes 41 collides with the adjacent gas, further mixing the mixed gas.

[0044] See also Figure 2 and Figure 4 The hydrogen injection tube 1 is generally L-shaped, with one end open and the other sealed. The open end is located at the top of the vertical section of the L-shaped tube. The horizontal section of the L-shaped tube is provided with a through hole, which constitutes a hydrogen jet hole 11. The hydrogen jet hole 11 is used to allow high-pressure hydrogen to enter the natural gas pipeline 2. The top of the vertical section of the hydrogen injection tube 1 is set to be open to facilitate the hydrogen injection equipment to add high-pressure hydrogen into the hydrogen injection tube 1 from the open end. The hydrogen jet hole 11 is provided in the vertical section of the hydrogen injection tube 1 so that the high-pressure hydrogen can be injected from the hydrogen jet hole 11 into the natural gas pipeline 2, thereby causing the hydrogen to initially mix with the natural gas in the natural gas pipeline 2.

[0045] See also Figure 2 and Figure 4 A plurality of hydrogen jet holes 11 are provided on the sidewall of the horizontal section, with the virtual axis of the jet holes perpendicular to the natural gas flow direction. Since the natural gas in natural gas pipeline 2 flows along its length, the hydrogen jet holes 11 are positioned on the sidewall of the horizontal section so that the high-pressure hydrogen ejected from the jet holes is perpendicular to the natural gas flow direction, causing the hydrogen and natural gas to collide and initially mix.

[0046] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only a specific implementation method of the utility model and is not intended to limit the scope of protection of the utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the utility model should be included in the scope of protection of the utility model.

Claims

1. A hydrogen-blended natural gas static rectification device, characterized in that: include: A hydrogen injection pipe, which is used to inject hydrogen into the natural gas pipeline; A mixing structure is used to evenly mix hydrogen with natural gas. In a working state, the mixing structure is installed downstream of the hydrogen injection pipe. The mixing structure includes an outer sleeve and a rectifying plate. Both ends of the outer sleeve are open. The rectifying plate is arranged in the inner cavity of the outer sleeve. Several guide holes are provided on the rectifying plate.

2. The hydrogen-blended natural gas static rectification device according to claim 1, characterized in that: The rectifier plate is in a spiral shape along the length direction of the natural gas pipeline as a whole.

3. The hydrogen-blended natural gas static rectification device according to claim 2, characterized in that: A plurality of the rectifier plates are provided, and the torsion angles of the plurality of rectifier plates are different.

4. The hydrogen-blended natural gas static rectification device according to claim 3, characterized in that: The torsion angle is 15° to 90°.

5. The hydrogen-blended natural gas static rectification device according to claim 3, characterized in that: The lengths of the plurality of rectifying plates are different.

6. The hydrogen-blended natural gas static rectification device according to claim 1, characterized in that: The inner cavity of the inlet end of the outer sleeve is provided with a tapered surface, and the cross section of the tapered surface gradually becomes smaller along the end of the outer sleeve toward the center.

7. The hydrogen-blended natural gas static rectification device according to any one of claims 1 to 6, characterized in that: The guide holes are perpendicular to the portion of the rectifier plate where the corresponding guide holes are provided.

8. The hydrogen-blended natural gas static rectification device according to claim 1, characterized in that: The hydrogen injection tube is L-shaped as a whole, with one end of the hydrogen injection tube being open and the other end being sealed. The open end is located at the top of the vertical section of the L-shaped tube, and a through hole is provided on the horizontal section of the L-shaped tube. The through hole constitutes a hydrogen jet hole, and the hydrogen jet hole is used to allow high-pressure hydrogen to enter the natural gas pipeline.

9. The hydrogen-blended natural gas static rectification device according to claim 8, characterized in that: There are a plurality of hydrogen jet holes, each of which is located on the side wall of the horizontal section, and the virtual axis of the jet hole is perpendicular to the gas flow direction of the natural gas.

10. The hydrogen-blended natural gas static rectification device according to any one of claims 8 or 9, characterized in that: The hydrogen jet holes are evenly distributed on the side wall of the horizontal section.

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