Natural gas hydrogen-doped static mixer

Abstract

The utility model provides a natural gas hydrogen-doped static mixer which comprises a natural gas conveying pipeline and a hydrogen conveying pipeline which is vertically arranged on the side wall of the natural gas conveying pipeline. A plurality of first mixing structures and second mixing structures are sequentially arranged on the downstream of the communicating position of the hydrogen conveying pipeline and the natural gas conveying pipeline at intervals, each first mixing structure comprises a plurality of waved plates, and the waved plates are sequentially distributed left and right at intervals. The second mixing structure comprises a plurality of groups of first mixing sub-groups and second mixing sub-groups which are sequentially distributed at intervals from top to bottom; each of the first mixing sub-groups and the second mixing sub-groups comprises a plurality of strip-shaped partition plates. Natural gas and hydrogen are fully cut and mixed through the first mixing structure and the second mixing structure in the mixer, the mixing uniformity of the natural gas and the hydrogen is improved, and then the use safety of gas equipment is improved.

Description

Technical Field

[0001] This utility model relates to the field of gas mixer technology, specifically a natural gas hydrogen-blended static mixer. Background Technology

[0002] Hydrogen blending into natural gas is one of the main forms of hydrogen energy utilization. It involves injecting hydrogen produced by the electrolysis of renewable energy sources or excess hydrogen generated under full-load operation of hydrogen refueling stations into the natural gas pipeline network to form hydrogen-blended natural gas. This blended natural gas is then transported to end users through the pipeline network, thus realizing a hydrogen energy industry chain of "blending-transportation-utilization" and promoting the deep integration of "hydrogen energy and gas network". Natural gas blending technology not only improves the utilization rate of renewable energy but also contributes to reducing pollutants generated from the combustion of natural gas at the end-user level, solving air pollution problems, and achieving carbon emission reduction.

[0003] Existing natural gas and hydrogen mixing equipment often places the hydrogen inlet pipe in the center of the natural gas pipeline and then mixes the hydrogen with the natural gas. This method causes the hydrogen to concentrate in the middle of the natural gas pipeline, resulting in poor mixing uniformity. Utility Model Content

[0004] The purpose of this invention is to provide a static mixer for blending natural gas and hydrogen. The first and second mixing structures in the mixer fully cut and mix natural gas and hydrogen, thereby improving the uniformity of the mixing of natural gas and hydrogen and thus improving the safety of gas-using equipment.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a natural gas hydrogen-blending static mixer, including a natural gas transmission pipeline and a hydrogen transmission pipeline. The hydrogen transmission pipeline is vertically arranged on the side wall of the natural gas transmission pipeline and is connected to the natural gas transmission pipeline. Downstream of the connection point of the hydrogen transmission pipeline and the natural gas transmission pipeline, a number of first mixing structures and second mixing structures are arranged at intervals. The first mixing structure includes a number of corrugated plates, which are arranged at intervals from left to right. The two corrugated ends of the corrugated plates are fixedly connected to the side wall of the natural gas transmission pipeline. A first mixing channel is formed between the corrugated plate away from the center of the natural gas transmission pipeline and the side wall of the natural gas transmission pipeline. A second mixing channel is formed between two adjacent corrugated plates. The second mixing structure includes a number of first mixing groups and second mixing groups arranged at intervals from top to bottom. Both the first mixing groups and the second mixing groups include a number of strip-shaped partitions. A third mixing channel is formed between the strip-shaped partitions adjacent to the side wall of the natural gas transmission pipeline and the natural gas transmission pipeline. A fourth mixing channel is formed between two adjacent strip-shaped partitions.

[0006] Preferably, the strip-shaped partitions in the first mixed group and the second mixed group are distributed in parallel intervals.

[0007] Furthermore, the two adjacent strip partitions are arranged perpendicularly to each other.

[0008] Furthermore, the two adjacent wave plates are distributed in a symmetrical manner.

[0009] Furthermore, the angle of the apex of the V-shaped groove of the wave plate is α, where 50°≤α≤70°.

[0010] Preferably, the outlet of the hydrogen transmission pipeline is located in the middle of the natural gas transmission pipeline.

[0011] The beneficial effects of this utility model are:

[0012] 1. The first mixing mechanism has multiple wave-shaped channels to achieve multi-stream diversion of the mixed gas. Each gas stream flows in a wave-like manner within the wave-shaped channels, thereby achieving full diffusion and mixing of natural gas and hydrogen. The strip-shaped baffles in the second mixing mechanism are distributed in a mesh structure, which can cut and mix the mixed gas flowing out from the wave-shaped channels again as a whole, thereby further improving the mixing effect of natural gas and hydrogen. Multiple sets of first mixing structures and second mixing mechanisms are arranged sequentially and at intervals in the natural gas transmission pipeline. Hydrogen and natural gas continuously flow through the first mixing structure and the second mixing mechanism, thereby ultimately ensuring the uniformity of mixing of natural gas and hydrogen.

[0013] 2. The mixer has no moving parts, has a simple structure, and reduces manufacturing costs.

[0014] 3. The mixer is small in size and occupies little space, making it easy to install and use in various production scenarios.

[0015] 4. This mixer has no vulnerable parts or moving parts, making it less prone to failure and with a long service life, thus reducing the cost and workload of maintenance and replacement of parts. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some preferred embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a longitudinal sectional view of the overall structure of this utility model;

[0018] Figure 2 for Figure 1Enlarged view of point A in the middle;

[0019] Figure 3 for Figure 1 Enlarged view at point B in the middle;

[0020] Figure 4 This is a schematic diagram showing the distribution of the first mixing structure within the natural gas transmission pipeline, viewed from the axial direction of the pipeline.

[0021] Figure 5 This is a schematic diagram showing the distribution of the second mixing structure within the natural gas transmission pipeline, viewed from the axial direction.

[0022] In the figure: 1 Natural gas transmission pipeline, 2 Hydrogen transmission pipeline, 3 First mixing structure, 31 Corrugated plate, 311 V-shaped groove, 32 First mixing channel, 33 Second mixing channel, 4 Second mixing structure, 41 First mixing group, 42 Second mixing group, 43 Strip baffle, 44 Third mixing channel, 45 Fourth mixing channel. Detailed Implementation

[0023] The following will describe specific embodiments and appendices. Figure 1-5 The technical solutions in the embodiments of this utility model are clearly and completely described below. Obviously, the described embodiments are only some preferred embodiments of this utility model, and not all embodiments. Those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0024] This invention provides a static mixer for hydrogen-blended natural gas (such as...). Figure 1As shown, the system includes a natural gas pipeline 1 and a hydrogen pipeline 2. The hydrogen pipeline 2 is vertically installed on the side wall of the natural gas pipeline 1 and is connected to the natural gas pipeline 1. In practical applications, the hydrogen pipeline 2 transports hydrogen into the natural gas pipeline 1, providing a foundation for the subsequent thorough mixing of natural gas and hydrogen. To improve the initial mixing effect of natural gas and hydrogen, the outlet of the hydrogen pipeline 2 can be located in the middle of the natural gas pipeline 1. The hydrogen flowing out of the hydrogen pipeline 2 is directly distributed in the middle of the natural gas flowing in the natural gas pipeline 2, which facilitates the full diffusion of hydrogen in the natural gas. Downstream of the gas transmission pipeline 1, several sets of first mixing structures 3 and second mixing structures 4 are sequentially spaced. Both the first mixing structures 3 and second mixing structures 4 are used to separate and agitate the mixed gas composed of hydrogen and natural gas, thereby facilitating further mixing of natural gas and hydrogen. In this specific embodiment, both the first mixing structures 3 and second mixing structures 4 are set in two sets, sequentially spaced. The first mixing structure 3 includes several corrugated plates 31, which are sequentially spaced to the left and right. The two corrugated ends of the corrugated plates 31 are fixedly connected to the sidewall of the natural gas transmission pipeline 1. A first mixing layer is formed between the corrugated plates 31 away from the center of the natural gas transmission pipeline 1 and the sidewall of the natural gas transmission pipeline 1. The mixing channel 31 forms a second mixing channel 33 between two adjacent corrugated plates 31. Multiple corrugated plates 31 are used to divert the mixed gas. The diverted gas flows within either the first mixing channel 32 or the second mixing channel 33. Because both the first and second mixing channels 32 and 33 are corrugated, they further obstruct and disturb the diverted gas flowing within them, thereby achieving further diffusion and mixing of natural gas and hydrogen within the diverted gas. The second mixing structure 4 includes several groups of first mixing groups 41 and second mixing groups 42 arranged vertically and alternately. Both the first mixing group 41 and the second mixing group 42 include several strip-shaped baffles 43. The strip-shaped baffles 43 adjacent to the side wall of the natural gas transmission pipeline 1 are connected to the side wall of the pipeline. A third mixing channel 44 is formed between the natural gas transmission pipelines 1, and a fourth mixing channel 45 is formed between two adjacent strip baffles 43. Multiple mixed gas flows from the first mixing structure 1 directly enter the second mixing structure 4. The mixed gas is blocked by multiple strip baffles 43 in the second mixing structure 4, and then enters the third mixing channel 44 and the fourth mixing channel 45. Because the adjacent strip baffles 43 are spaced apart, the mixed gas, after being blocked and disturbed by the strip baffles 43, is re-collected and mixed. After being collected and mixed, it is blocked and disturbed again by the strip baffles 43 in the second mixing structure 4, and the mixed gas is repeatedly blocked, disturbed and collected again, thereby achieving a thorough mixing of natural gas and hydrogen in the mixed gas.To further enhance the mixing effect of the second mixing structure 4 on the mixed gas flow, several strip-shaped baffles 43 within the first mixing group 41 and the second mixing group 42 are arranged in parallel intervals. The parallel intervals of the strip-shaped baffles 43 within each group effectively obstruct and disturb the mixed gas flow. Furthermore, adjacent strip-shaped baffles 43 are arranged perpendicularly to each other, and the adjacent strip-shaped baffles 43 have different inclination directions within the natural gas transmission pipeline 1, thus creating different directions of obstruction and disturbance to the mixed gas, thereby further enhancing the degree of obstruction and disturbance to the mixed gas.

[0025] Based on the above embodiments, in order to further improve the disturbance and mixing effect of the first mixing structure 3 on the mixed gas, the two adjacent wave plates 31 are distributed in a left-right symmetrical state.

[0026] Furthermore, the angle of the apex of the V-shaped groove 311 of the wave plate 31 is α, 50°≤α≤70°. In this specific embodiment, α is set to 60°. When α is 60°, it can effectively achieve the flow disturbance of the mixed gas while ensuring the flowability of the mixed gas. At the same time, it is also convenient to ensure the structural strength of the wave plate 31.

[0027] In this utility model, "upper", "lower", "front", "back", "left", and "right" are all relative positions used to facilitate the description of positional relationships, and therefore cannot be understood as absolute positions as limitations on the scope of protection.

[0028] Except for the technical features described in the specification, all other technologies are known to those skilled in the art.

[0029] The preferred embodiments and examples of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments and examples. For those skilled in the art, several improvements and modifications can be made without departing from the concept of the present invention, and these improvements and modifications should also be considered within the protection scope of the present invention.

Claims

1. A static mixer for blending hydrogen into natural gas, characterized in that, The system includes a natural gas pipeline and a hydrogen pipeline. The hydrogen pipeline is vertically installed on the side wall of the natural gas pipeline and is connected to the natural gas pipeline. Downstream of the connection point of the hydrogen and natural gas pipelines, several sets of first and second mixing structures are arranged at intervals. The first mixing structure includes several corrugated plates, which are arranged at intervals from left to right. The two corrugated ends of the corrugated plates are fixedly connected to the side wall of the natural gas pipeline. A first mixing channel is formed between the corrugated plate away from the center of the natural gas pipeline and the side wall of the natural gas pipeline. A second mixing channel is formed between two adjacent corrugated plates. The second mixing structure includes several sets of first and second mixing groups arranged at intervals from top to bottom. Both the first and second mixing groups include several strip-shaped partitions. A third mixing channel is formed between the strip-shaped partitions adjacent to the side wall of the natural gas pipeline and the natural gas pipeline. A fourth mixing channel is formed between two adjacent strip-shaped partitions.

2. A natural gas hydrogen-blending static mixer according to claim 1, characterized in that, The strip-shaped partitions in the first and second mixed groups are distributed in parallel intervals.

3. A static mixer for blending hydrogen into natural gas according to claim 2, characterized in that, The two adjacent strip partitions are arranged perpendicularly to each other.

4. A static mixer for blending hydrogen into natural gas according to claim 3, characterized in that, The two adjacent wave plates are distributed symmetrically.

5. A static mixer for blending hydrogen into natural gas according to claim 4, characterized in that, The angle of the apex of the V-shaped groove of the wave plate is α, where 50°≤α≤70°.

6. A static mixer for blending hydrogen into natural gas according to any one of claims 1-5, characterized in that, The outlet of the hydrogen transmission pipeline is located in the middle of the natural gas transmission pipeline.

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