Natural gas hydrogen blending ratio gas mixing adjusting device

Abstract

The utility model provides a natural gas mixes hydrogen ratio mixed gas adjusting device, natural gas mixes hydrogen ratio mixed gas adjusting device includes mounting bracket, is fixedly connected with natural gas inlet pipeline and hydrogen inlet pipeline respectively on the mounting bracket, one end of hydrogen inlet pipeline is fixedly connected with hydrogen flowmeter, the hydrogen flowmeter is fixedly connected with hydrogen regulating valve away from one end of hydrogen inlet pipeline, one end of natural gas inlet pipeline is fixedly connected with natural gas flowmeter, the natural gas flowmeter is fixedly connected with natural gas regulating valve away from one end of natural gas inlet pipeline, the other end of natural gas inlet pipeline is fixedly connected with connecting section, the other end of connecting section away from natural gas inlet pipeline is fixedly connected with hydrogen inlet pipeline, the outside wall of connecting section is fixedly connected with adjusting assembly, realizes the flexible adjustment to the flow passage cross -section area through adjusting assembly, effectively adapts the working condition of different flow and pressure, improves the applicability.

Description

Technical Field

[0001] This utility model relates to the field of hydrogen blending in natural gas, and in particular to a natural gas hydrogen blending ratio regulating device. Background Technology

[0002] Against the backdrop of energy transition, blending hydrogen into natural gas pipelines in a certain proportion for transportation and utilization is an important technological path to improve the absorption capacity of renewable energy and reduce carbon emissions. Different application scenarios, such as industrial combustion, residential gas, and gas turbines, have different requirements for the proportion of hydrogen blending, and the proportion needs to be flexibly adjusted according to the gas source, load, and other conditions.

[0003] Existing natural gas hydrogen blending proportioning devices mostly use fixed mixing channels. When the total flow rate or inlet pressure required by the system changes significantly, the fixed mixing channel structure is difficult to adapt to all operating conditions. Under low flow conditions, a large mixing channel will result in excessively low gas flow velocity and poor mixing efficiency. Under high flow conditions, a fixed channel may cause excessive flow resistance, significant pressure loss, or insufficient mixing due to excessively high flow velocity. Therefore, it is necessary to provide a new natural gas hydrogen blending proportioning device to solve the above technical problems. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a natural gas hydrogen blending ratio mixing adjustment device.

[0005] The natural gas-hydrogen blending proportioning device provided by this utility model includes a mounting frame, on which a natural gas inlet pipe and a hydrogen inlet pipe are fixedly connected respectively. A hydrogen flow meter is fixedly connected to one end of the hydrogen inlet pipe, and a hydrogen regulating valve is fixedly connected to the end of the hydrogen flow meter away from the hydrogen inlet pipe. A natural gas flow meter is fixedly connected to one end of the natural gas inlet pipe, and a natural gas regulating valve is fixedly connected to the end of the natural gas flow meter away from the natural gas inlet pipe. A connecting section is fixedly connected to the other end of the natural gas inlet pipe, and the end of the connecting section away from the natural gas inlet pipe is fixedly connected to the hydrogen inlet pipe. An adjusting component is provided on the outer wall of the connecting section.

[0006] Preferably, the adjusting assembly includes a threaded sleeve disposed on the outer wall of the connecting section, an adjusting screw is threadedly connected to the threaded sleeve, one end of the adjusting screw extends into the connecting section, a conical block is fixedly connected to the end of the adjusting screw extending into the connecting section, and a rotating handle is fixedly connected to the end of the adjusting screw located outside the connecting section.

[0007] Preferably, a mixing chamber is fixedly connected to the outer wall of the connecting section, and a driving chamber and a mixed gas discharge pipe are fixedly connected to the outer wall of the mixing chamber.

[0008] Preferably, two sliding rails are fixedly connected to the inner side wall of the drive chamber, and a sliding seat is provided on each of the two sliding rails. A motor is fixedly connected between the two sliding seats, and the output end of the motor extends into the mixing chamber.

[0009] Preferably, two sliding rails are fixedly connected to the inner side wall of the drive chamber, and a sliding seat is provided on each of the two sliding rails. A motor is fixedly connected between the two sliding seats, and the output end of the motor extends into the mixing chamber.

[0010] Preferably, the plurality of the turbulence-disrupting elements are spiral-shaped guide vanes.

[0011] Compared with related technologies, the natural gas hydrogen blending ratio regulating device provided by this utility model has the following beneficial effects: This invention provides a natural gas hydrogen blending ratio regulating device. In specific implementation, by setting an adjustable mixing channel structure, the cross-sectional area of ​​the flow channel can be flexibly adjusted using the regulating components, effectively adapting to different flow and pressure conditions: at low flow rates, the channel is narrowed to increase flow velocity and mixing efficiency, while at high flow rates, the channel is widened to reduce flow resistance and pressure loss. The device has a compact structure and is easy to operate, significantly improving the mixing performance and energy utilization efficiency of the hydrogen blending system under all operating conditions, which is of positive significance for promoting the consumption of renewable energy and emission reduction. Attached Figure Description

[0012] Figure 1 A schematic diagram of a preferred embodiment of the natural gas hydrogen blending ratio mixing and regulating device provided by this utility model; Figure 2 for Figure 1 The schematic diagram of the cross-sectional structure of the utility model shown; Figure 3 for Figure 1 The diagram shows another cross-sectional view of the utility model.

[0013] Labels in the diagram: 1. Mounting bracket; 2. Natural gas inlet pipe; 3. Hydrogen inlet pipe; 4. Hydrogen flow meter; 5. Hydrogen regulating valve; 6. Natural gas flow meter; 7. Natural gas regulating valve; 8. Connecting section; 9. Adjusting assembly; 901. Threaded sleeve; 902. Adjusting screw; 903. Conical block; 904. Rotating handle; 10. Mixing chamber; 1001. Rotating rod; 1002. Baffle; 11. Drive chamber; 1101. Sliding rail; 1102. Sliding seat; 1103. Motor; 12. Mixed gas discharge pipe. Detailed Implementation

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0015] In specific implementation, a natural gas hydrogen blending ratio regulating device has the following structure: Figure 1 — Figure 3 As shown, the device includes a mounting frame 1, which supports and secures all pipes and components to ensure structural stability. A natural gas inlet pipe 2 and a hydrogen inlet pipe 3 are fixedly connected to the mounting frame 1. A hydrogen flow meter 4 is fixedly connected to one end of the hydrogen inlet pipe 3. The natural gas inlet pipe 2 and the hydrogen inlet pipe 3 respectively transport natural gas and hydrogen from the upstream pipeline network or gas source. A hydrogen regulating valve 5 is fixedly connected to the end of the hydrogen flow meter 4 away from the hydrogen inlet pipe 3. A natural gas flow meter 6 is fixedly connected to one end of the natural gas inlet pipe 2. A natural gas regulating valve 7 is fixedly connected to the end of the natural gas flow meter 6 away from the natural gas inlet pipe 2. The hydrogen regulating valve 5 and the natural gas regulating valve 7 precisely adjust the inlet flow rates of hydrogen and natural gas based on the data provided by the hydrogen flow meter 4 and the natural gas flow meter 6, achieving precise blending ratio control. In this embodiment, the hydrogen flow meter is a RHM06L high-pressure hydrogen mass flow meter manufactured by RHEONIK in Germany, with a standard range of 0.15 ~ 20 kg / min. The system features high-precision measurement and stable performance. The natural gas flow meter selected is the XD-LUX intelligent natural gas flow meter manufactured by Jiangsu Xianda Instrument Co., Ltd. This flow meter boasts a wide flow range, simple operation and maintenance, and convenient installation and use. The hydrogen regulating valve selected is the HDH high-pressure hydrogen regulating valve manufactured by Chongqing Haiwang Instrument Co., Ltd. Its material selection, referencing Nelson curves and operating conditions, can prevent hydrogen embrittlement or hydrogen erosion. The natural gas regulating valve selected is the RTZ-32 gas pressure regulating valve manufactured by Shanghai Qiaoyi Valve Manufacturing Co., Ltd. This regulating valve has an inlet pressure of 0.02~0.4Mpa and an outlet pressure of 1~30Kpa, offering large flow capacity and high pressure regulation accuracy.

[0016] A connecting section 8 is fixedly connected to the other end of the natural gas intake pipe 2. The end of the connecting section 8 away from the natural gas intake pipe 2 is fixedly connected to the hydrogen intake pipe 3. The connecting section 8 is the pipe section where natural gas and hydrogen initially merge. An adjusting component 9 is provided on the outer wall of the connecting section 8. The adjusting component 9 includes a threaded sleeve 901, which provides threaded engagement and support for the adjusting screw 902. The threaded sleeve 901 is located on the outer wall of the connecting section 8. The adjusting screw 902 is threadedly connected to the inner thread of the threaded sleeve 901. One end of the adjusting screw 902 extends into the connecting section 8. One end of the screw 902 is fixedly connected to a conical block 903. The adjusting screw 902 can be precisely moved axially by rotation, thereby pushing the conical block 903 to change its position. The change in the axial position of the conical block 903 directly changes the cross-sectional area of ​​the flow channel inside the connecting section 8 to adapt to different working conditions and ensure mixing efficiency. The top of the threaded sleeve 901 is provided with a sealing ring made of a polymer material with excellent hydrogen compatibility, such as perfluoroether rubber or hydrogenated nitrile rubber, so that the device has good airtightness when it starts working after adjustment. The end of the adjusting screw 902 located outside the connecting section 8 is fixedly connected to a rotating handle 904.

[0017] A mixing chamber 10 is also fixedly connected to the outer wall of the connecting section 8. The mixing chamber 10 provides a space for the full and final mixing of gases. A drive chamber 11 and a mixed gas discharge pipe 12 are fixedly connected to the outer wall of the mixing chamber 10. Two sliding rails 1101 are fixedly connected to the inner wall of the drive chamber 11. Each of the two sliding rails 1101 is provided with a sliding seat 1102. A motor 1103 is fixedly connected between the two sliding seats 1102. The sliding track 1101 and the sliding seat 1102 together form a sliding pair, allowing the motor 1103 to move axially synchronously with the adjusting component 9, while ensuring the stable operation of the motor 1103. The output end of the motor 1103 extends into the mixing chamber 10. A rotating rod 1001 is rotatably connected to the bottom of the conical block 903. The end of the rotating rod 1001 away from the conical block 903 is fixedly connected to the output end of the motor 1103. Multiple flow-disrupting elements 1002 are fixedly connected to the outer wall of the rotating rod 1001. The motor 1103 drives the rotating rod 1001 and the flow-disrupting elements 1002 to rotate at high speed, which is the core power source for active mixing. The multiple flow-disrupting elements 1002 are spiral guide vanes. When rotating at high speed, they generate strong shearing and turbulence effects on the gas, forcing the gas to be fully mixed and ensuring the uniformity of hydrogen doping. Finally, the fully mixed hydrogen-doped natural gas is transported to the downstream pipeline network or user end through the mixed gas discharge pipe 12.

[0018] The working principle of this utility model is as follows: Hydrogen and natural gas enter the system through their respective inlet pipes. The inlet ratio is precisely controlled by the hydrogen regulating valve 5, the natural gas regulating valve 7, and the matching flow meter. The two airflows converge in the connecting section 8. The operator can drive the adjusting screw 902 by rotating the rotating handle 904, thereby controlling the axial position of the conical block 903 in the connecting section 8 and dynamically changing the effective cross-sectional area of ​​the mixing channel. Under high flow conditions, the conical block 903 is raised to expand the flow channel and reduce flow resistance and pressure loss. Under low flow conditions, the conical block 903 is lowered to contract the flow channel and increase the flow velocity. Subsequently, the premixed gas enters the mixing chamber 10, and the rotating rod 1001 is driven by the motor 1103 to rotate at high speed, causing the spiral guide vanes on it to generate strong shearing and turbulence, so that the hydrogen and natural gas are fully and uniformly mixed. Finally, the hydrogen-blended natural gas with precise ratio and uniform mixing is output from the mixed gas discharge pipe 12 to meet the needs of different downstream application scenarios.

[0019] The circuits and controls involved in this utility model are all existing technologies, and will not be described in detail here.

[0020] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A natural gas hydrogen blending ratio regulating device, characterized in that, The system includes a mounting frame (1), on which a natural gas inlet pipe (2) and a hydrogen inlet pipe (3) are fixedly connected respectively. A hydrogen flow meter (4) is fixedly connected to one end of the hydrogen inlet pipe (3), and a hydrogen regulating valve (5) is fixedly connected to the end of the hydrogen flow meter (4) away from the hydrogen inlet pipe (3). A natural gas flow meter (6) is fixedly connected to one end of the natural gas inlet pipe (2), and a natural gas regulating valve (7) is fixedly connected to the end of the natural gas flow meter (6) away from the natural gas inlet pipe (2). A connecting section (8) is fixedly connected to the other end of the natural gas inlet pipe (2), and the end of the connecting section (8) away from the natural gas inlet pipe (2) is fixedly connected to the hydrogen inlet pipe (3). An adjusting component (9) is provided on the outer wall of the connecting section (8).

2. The natural gas hydrogen blending proportioning device according to claim 1, characterized in that, The adjusting assembly (9) includes a threaded sleeve (901) disposed on the outer wall of the connecting section (8). An adjusting screw (902) is threadedly connected inside the threaded sleeve (901). One end of the adjusting screw (902) extends into the connecting section (8). A conical block (903) is fixedly connected to one end of the adjusting screw (902) extending into the connecting section (8). A rotating handle (904) is fixedly connected to one end of the adjusting screw (902) located outside the connecting section (8).

3. The natural gas hydrogen blending proportioning device according to claim 2, characterized in that, The outer wall of the connecting section (8) is fixedly connected to a mixing chamber (10), and the outer wall of the mixing chamber (10) is fixedly connected to a drive chamber (11) and a mixed gas discharge pipe (12).

4. The natural gas hydrogen blending proportioning device according to claim 3, characterized in that, The inner wall of the drive chamber (11) is fixedly connected to two sliding rails (1101), and each of the two sliding rails (1101) is provided with a sliding seat (1102). A motor (1103) is fixedly connected between the two sliding seats (1102).

5. The natural gas hydrogen blending proportioning device according to claim 4, characterized in that, The output end of the motor (1103) extends into the mixing chamber (10). A rotating rod (1001) is rotatably connected to the bottom of the conical block (903). The end of the rotating rod (1001) away from the conical block (903) is fixedly connected to the output end of the motor (1103). Multiple baffles (1002) are fixedly connected to the outer wall of the rotating rod (1001).

6. The natural gas hydrogen blending proportioning device according to claim 5, characterized in that, The plurality of the aforementioned baffles (1002) are spiral-shaped baffles.

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