Natural gas hydrogen-doped and hydrogen-mixed online conveying system and natural gas hydrogen-doped and hydrogen-mixed device thereof

Abstract

The utility model discloses a natural gas hydrogen doping and mixing device which comprises a device body, a circulation channel used for gas circulation is arranged in the device body, and the gas inlet end and the gas outlet end of the circulation channel are respectively provided with a rotary flange assembly. The rotating flange assembly comprises an inserting pipe, a connecting flange is arranged at one end of the inserting pipe, the other end of the inserting pipe is inserted into the circulation channel, and a sealing bearing is arranged between the inserting pipe and the device body. The utility model further provides a natural gas hydrogen-doped and hydrogen-mixed online conveying system which comprises a first natural gas conveying pipe and a second natural gas conveying pipe, and the natural gas hydrogen-doped and hydrogen-mixed device is installed between the first natural gas conveying pipe and the second natural gas conveying pipe. A hydrogen conveying pipe is connected to the first natural gas conveying pipe, and mounting flanges are arranged at the ends, facing the natural gas hydrogen doping and mixing device, of the first natural gas conveying pipe and the second natural gas conveying pipe correspondingly. The natural gas hydrogen-doped and mixed on-line conveying system has the advantage of being convenient to install.

Description

Technical Field

[0001] This utility model relates to the technical field of hydrogen mixing equipment, specifically to an online natural gas hydrogen blending and transportation system and its natural gas hydrogen blending and mixing device. Background Technology

[0002] The principle of hydrogen blending with natural gas and transporting it through existing natural gas pipelines involves injecting a certain proportion of hydrogen into natural gas to form a mixed gas (HCNG), which is then transported through existing natural gas pipelines. This mixed gas can be used directly as fuel, or hydrogen can be separated and used downstream of the pipeline.

[0003] Online mixing and transportation of hydrogen and natural gas requires the installation of a hydrogen-hydrogen mixing unit on the natural gas pipeline. However, during installation, the flange mounting holes of existing hydrogen-hydrogen mixing units often fail to align correctly with those on the transportation pipeline. This necessitates manual lifting of the mixing unit for alignment, which is not only time-consuming and labor-intensive but also detrimental to installation. Furthermore, existing online hydrogen-hydrogen mixing systems simply connect the natural gas pipeline to the mixing pipe, resulting in incomplete mixing of hydrogen and natural gas, affecting usability. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide an online natural gas blending and mixing system and a natural gas blending and mixing device, which has the advantage of convenient installation.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] This utility model first proposes a natural gas hydrogen blending device, including a device body, wherein the device body is provided with a flow channel for gas flow, and the inlet end and outlet end of the flow channel are respectively provided with rotating flange assemblies.

[0007] The rotary flange assembly includes a connector, one end of which is provided with a connecting flange, and the other end of which is inserted into the flow channel. An airtight sealed bearing is provided between the connector and the main body of the device.

[0008] Furthermore, the flow channel is provided with a baffle element to block the airflow and promote the mixing of natural gas and hydrogen.

[0009] Furthermore, the partition element is a partition plate disposed within the flow channel.

[0010] Furthermore, a connecting hole for airflow is provided on the baffle plate or between the baffle plate and the flow channel.

[0011] Furthermore, the partition plates are spaced at least two apart, and the connecting holes between adjacent partition plates are staggered.

[0012] Furthermore, the connecting hole is a semi-circular connecting hole.

[0013] Furthermore, the sealed bearing is a gas bearing or a mechanical seal bearing.

[0014] Furthermore, the flow channel is provided with spiral vanes for agitating the airflow to promote the mixing of natural gas and hydrogen.

[0015] This utility model also proposes an online natural gas blending and mixing system, including a first natural gas transport pipe and a second natural gas transport pipe, wherein the natural gas blending and mixing device described above is installed between the first natural gas transport pipe and the second natural gas transport pipe.

[0016] A hydrogen transport pipe is connected to the first natural gas transport pipe, and the first and second natural gas transport pipes are respectively provided with mounting flanges at the ends facing the natural gas hydrogen blending device.

[0017] The mounting flange installed on the first natural gas transport pipe is connected to the connecting flange located at the gas inlet end of the flow channel; the mounting flange installed on the second natural gas transport pipe is connected to the connecting flange located at the gas outlet end of the flow channel.

[0018] Furthermore, the mounting flange and the connecting flange are respectively provided with the same number of mounting through holes and connecting through holes evenly distributed in a ring; in the mounting flange and the connecting flange that are connected to each other, the mounting through holes and the connecting through holes are aligned, and a bolt is passed through the aligned mounting through hole and the connecting through hole, and a nut for connecting and fixing the mounting flange and the connecting flange is installed on the bolt.

[0019] The beneficial effects of this utility model are as follows:

[0020] This utility model discloses an online natural gas blending and mixing system. A natural gas blending and mixing device is installed between a first natural gas transport pipe and a second natural gas transport pipe, and a hydrogen transport pipe is connected to the first natural gas transport pipe. Natural gas and hydrogen are transported from the first and hydrogen transport pipes to the blending and mixing device for mixing, and then output through the second natural gas transport pipe. Specifically, by installing rotating flange assemblies at the inlet and outlet ends of the flow channel of the blending and mixing device, even if the mounting flange on the first natural gas transport pipe is not aligned with the connecting flange at the inlet end of the flow channel, or the mounting flange on the second natural gas transport pipe is not aligned with the connecting flange at the outlet end of the flow channel, the connecting flange can be easily rotated to align with the corresponding mounting flange, thus achieving connection between the connecting flange and the mounting flange. This system offers the advantage of convenient installation and effectively saves manpower and resources.

[0021] In addition, by setting baffles in the flow channel and staggering the connecting holes between adjacent baffles, the airflow flowing in from the connecting hole near the air inlet is blocked by the baffle near the air outlet, thereby causing the airflow to turn and flow out from the connecting hole near the air outlet. This can promote the mixing of natural gas and hydrogen.

[0022] By installing spiral vanes in the flow channel, the spiral vanes can turbulently circulate the airflow, further promoting the mixing of natural gas and hydrogen. Attached Figure Description

[0023] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the following drawings are provided for illustration:

[0024] Figure 1 This is a schematic diagram of the structure of an embodiment of the natural gas hydrogen blending and mixing online transportation system of this utility model;

[0025] Figure 2 A schematic diagram of a natural gas hydrogen blending device;

[0026] Figure 3 This is a full cross-sectional view of a natural gas hydrogen blending unit.

[0027] Explanation of reference numerals in the attached figures:

[0028] 10-First natural gas transport pipe; 11-First mounting flange; 20-Second natural gas transport pipe; 21-Second mounting flange; 30-Natural gas blending and mixing device; 31-Main body of the device; 32-Flow channel; 33-Baffle plate; 34-Connecting hole; 35-Spiral fan blade; 40-Rotating flange assembly; 41-Plug-in pipe; 42-Connecting flange; 43-Sealed bearing; 44-Bolt; 45-Nut. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.

[0030] like Figure 1 As shown, the natural gas hydrogen blending and mixing online transportation system of this embodiment includes a first natural gas transportation pipe 10 and a second natural gas transportation pipe 20, and a natural gas hydrogen blending and mixing device 30 is installed between the first natural gas transportation pipe 10 and the second natural gas transportation pipe 20.

[0031] Specifically, such as Figure 2 As shown, the natural gas hydrogen blending device 30 of this embodiment includes a device body 31, within which a flow channel 32 for gas flow is provided. A rotating flange assembly 40 is provided at both the inlet and outlet ends of the flow channel 32. In this embodiment, the rotating flange assembly 40 includes a connector 41, one end of which is provided with a connecting flange 42. The other end of the connector 41 is inserted into the flow channel 32, and an airtight sealed bearing 43 is provided between the connector 41 and the device body 31. Specifically, the sealed bearing 43 allows the connector 41 to rotate flexibly relative to the device body 31 while also meeting airtightness requirements and preventing gas leakage. The sealed bearing 43 can be implemented using various existing bearings, such as gas bearings (including gas hydrostatic bearings and gas dynamic bearings) and mechanical seal bearings (including metallurgical seal bearings and dry gas seal bearings), which will not be elaborated further.

[0032] In this embodiment, a hydrogen transport pipe 50 is connected to the first natural gas transport pipe 10, and mounting flanges are respectively provided at the ends of the first natural gas transport pipe 10 and the second natural gas transport pipe 20 facing the natural gas hydrogen blending device 30. The two mounting flanges are a first mounting flange 11 provided on the first natural gas transport pipe 10 and a second mounting flange 21 provided on the second natural gas transport pipe 20. Specifically, the first mounting flange 11 provided on the first natural gas transport pipe 10 is connected to the connecting flange 42 located at the gas inlet end of the flow channel 32. Specifically, when the first mounting flange 11 is connected to the connecting flange 42 located at the gas inlet end of the flow channel 32, if the first mounting flange 11 and the connecting flange 42 are not aligned, the connecting flange 42 can be driven to rotate so that the connecting flange 42 is aligned with the first mounting flange 11 before the first mounting flange 11 is connected and fixed to the corresponding connecting flange 42. Similarly, the second mounting flange 21 provided on the second natural gas transport pipe 20 is connected to the connecting flange 42 located at the gas outlet end of the flow channel 32. Specifically, when the second mounting flange 21 is connected to the connecting flange 42 located at the air outlet end of the flow channel 32, if the second mounting flange 21 and the connecting flange 42 are not aligned, the connecting flange 42 can be driven to rotate so that the connecting flange 42 is aligned with the second mounting flange 21 before the second mounting flange 21 is connected and fixed to the corresponding connecting flange 42.

[0033] Specifically, in this embodiment, the mounting flange and the connecting flange 42 are provided with the same number of mounting through holes and connecting through holes evenly distributed in a ring. In the interconnected mounting flange and connecting flange 42, the mounting through holes and connecting through holes are aligned, and bolts 44 are inserted between the aligned mounting through holes and connecting through holes. Nuts 45 for connecting and fixing the mounting flange and the connecting flange 42 are installed on the bolts 44.

[0034] In a preferred embodiment of this example, the flow channel 32 is provided with a baffle element to obstruct airflow and promote the mixing of natural gas and hydrogen. In this embodiment, the baffle element is a baffle plate 33 disposed within the flow channel 32. Specifically, a connecting hole 34 for airflow is provided on the baffle plate 33 or between the baffle plate 33 and the flow channel 32. In this embodiment, the connecting hole 34 is disposed on the baffle plate 33 and is a semi-circular connecting hole to increase the flow area of ​​the connecting hole 34. Specifically, at least two baffle plates 33 are spaced apart, and the connecting holes 34 between adjacent baffle plates 33 are staggered. In this embodiment, three baffle plates 33 are spaced apart. Of course, in other embodiments, the number of baffle plates 33 can also be four or more, the principle is the same, and will not be elaborated further. By setting baffles 33 in the flow channel 32 and staggering the connecting holes 34 between adjacent baffles 33, the airflow flowing in from the connecting hole 34 near the air inlet is blocked by the baffle 33 near the air outlet, thereby causing the airflow to turn and flow out from the connecting hole 34 near the air outlet. This can promote the mixing of natural gas and hydrogen.

[0035] In a preferred embodiment of this example, the flow channel 32 is provided with a spiral vane 35 for disturbing the airflow to promote the mixing of natural gas and hydrogen. In this way, the spiral vane 35 can be used to disturb the airflow and further promote the mixing of natural gas and hydrogen.

[0036] The natural gas-hydrogen blending online transportation system of this embodiment installs a natural gas-hydrogen blending device 30 between the first natural gas transportation pipe 10 and the second natural gas transportation pipe 20, and connects a hydrogen transportation pipe 50 to the first natural gas transportation pipe 10. Natural gas and hydrogen are then transported from the first natural gas transportation pipe 10 and the hydrogen transportation pipe 50 to the natural gas-hydrogen blending device 30 for mixing, and then output through the second natural gas transportation pipe 20. Specifically, rotating flange assemblies 4 are respectively installed at the inlet and outlet ends of the flow channel 32 of the natural gas-hydrogen blending device 30. When installing the natural gas hydrogen blending device 30, even if the first mounting flange 11 on the first natural gas transport pipe 10 is not aligned with the connecting flange 42 at the gas inlet end of the flow channel 32, or the second mounting flange 21 on the second natural gas transport pipe 20 is not aligned with the connecting flange 42 at the gas outlet end of the flow channel 32, the connecting flange 42 can be easily aligned with the corresponding mounting flange by rotating the connecting flange 42, thereby realizing the connection between the connecting flange 42 and the mounting flange. It has the advantage of convenient installation and can effectively save manpower and material resources.

[0037] The above-described embodiments are merely preferred embodiments provided to fully illustrate the present invention, and the scope of protection of the present invention is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present invention are all within the scope of protection of the present invention. The scope of protection of the present invention is defined by the claims.

Claims

1. A hydrogen-mixing device for natural gas, characterized by comprising: The device includes a main body, which has a flow channel for gas flow. The inlet and outlet ends of the flow channel are respectively equipped with rotating flange assemblies. The rotary flange assembly includes a connector, one end of which is provided with a connecting flange, and the other end of which is inserted into the flow channel. An airtight sealed bearing is provided between the connector and the main body of the device.

2. The hydrogen-enriched gas mixing device according to claim 1, wherein: The flow channel is equipped with a baffle element to block the airflow and promote the mixing of natural gas and hydrogen.

3. The hydrogen-enriched gas mixing device according to claim 2, wherein: The baffle element is a baffle plate disposed in the flow channel.

4. The hydrogen-enriched gas mixing device according to claim 3, wherein: The baffle plate or the space between the baffle plate and the flow channel is provided with a connecting hole for airflow.

5. The hydrogen-enriched gas mixing device according to claim 4, wherein: The partition plates are spaced at least two apart, and the connecting holes between adjacent partition plates are staggered.

6. The hydrogen-enriched gas mixing device according to claim 4, wherein: The connecting hole is a semi-circular connecting hole.

7. The hydrogen-enriched gas mixing device according to claim 1, wherein: The sealed bearing is either a gas bearing or a mechanical seal bearing.

8. The apparatus for mixing hydrogen into natural gas according to any one of claims 1 to 7, characterized in that: The flow channel is equipped with spiral vanes for agitating the airflow to promote the mixing of natural gas and hydrogen.

9. A natural gas hydrogen blended online hydrogen delivery system characterized by: It includes a first natural gas transport pipe and a second natural gas transport pipe, and a natural gas hydrogen blending device as described in any one of claims 1-8 is installed between the first natural gas transport pipe and the second natural gas transport pipe; A hydrogen transport pipe is connected to the first natural gas transport pipe, and the first and second natural gas transport pipes are respectively provided with mounting flanges at the ends facing the natural gas hydrogen blending device. The mounting flange installed on the first natural gas transport pipe is connected to the connecting flange located at the gas inlet end of the flow channel; the mounting flange installed on the second natural gas transport pipe is connected to the connecting flange located at the gas outlet end of the flow channel.

10. The on-line hydrogen blending and hydrogen-mixed natural gas delivery system of claim 9, wherein: The mounting flange and the connecting flange are respectively provided with the same number of mounting through holes and connecting through holes evenly distributed in a ring; in the mounting flange and the connecting flange that are connected to each other, the mounting through holes and the connecting through holes are aligned, and a bolt is passed through the aligned mounting through hole and the connecting through hole, and a nut for connecting and fixing the mounting flange and the connecting flange is installed on the bolt.

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