Hydrogenation device based on hydrogen doping of natural gas

Abstract

The present invention relates to the technical field of natural gas hydrogen doping, and discloses a natural gas hydrogen doping-based hydrogenation apparatus, which comprises: a hydrogen tank for storing hydrogen, one end of a connection pipe of the hydrogen tank is provided with a pressure reducing valve through a flange, and one end of the pressure reducing valve far away from the connection pipe is provided with a conveying pipe through a flange; the turbulent flow mechanism is used for optimizing the flow characteristic in the hydrogen conveying process; the hydrogen accelerating mechanism is used for accelerating the hydrogen flow rate; the nitrogen mechanism is used for providing a nitrogen barrier for the conveying pipe; the pressure relief mechanism is used for automatically releasing nitrogen when the nitrogen mechanism is too high; the hydrogen accelerating mechanism comprises a fixing ring, and the fixing ring is fixedly connected to the end, away from the connecting pipe, of the interior of the conveying pipe. The flow characteristic of hydrogen is optimized through the turbulent flow mechanism, the flow speed is increased through the hydrogen acceleration mechanism, the nitrogen mechanism forms an isolation barrier, automatic pressure relief is achieved through the pressure relief mechanism, and the hydrogen mixing efficiency and the conveying safety are overall improved.

Description

Technical Field

[0001] The present invention relates to the technical field of natural gas hydrogen blending, and specifically to a hydrogen addition device based on natural gas hydrogen blending. Background Art

[0002] The hydrogen-blended natural gas technology is an important way to realize the integrated application of hydrogen energy and natural gas. This technology mainly converts renewable energy (such as wind energy and solar energy) into electric energy, which is used for electrolyzing water to produce hydrogen. Then, the produced hydrogen is incorporated into the natural gas transmission system at a certain ratio to form hydrogen-blended natural gas, which is finally supplied to the terminal combustion device or other application systems. Due to the good cleanliness and high calorific value of hydrogen, this technology can not only reduce the carbon emissions of natural gas but also provide a path for the large-scale utilization of hydrogen energy.

[0003] In the prior art, the hydrogen blending process usually relies on a single hydrogen valve control and pressure-reducing conveying device, which has a relatively simple structure. The core process mainly includes: opening the main valve at the top of the hydrogen tank to release high-pressure hydrogen, adjusting the pressure to an appropriate range through a pressure reducing valve, and then conveying it into the natural gas pipeline to be mixed with natural gas. Although this process can achieve the basic transportation and blending of hydrogen, it still faces various limitations in practical applications.

[0004] First of all, due to the lack of effective turbulence and guiding structures in the hydrogen flow process, it is easy to cause unstable flow velocity and uneven gas distribution during the hydrogen blending process, thereby affecting the mixing uniformity of hydrogen and natural gas and reducing the blending efficiency. Secondly, the low molecular weight and high diffusivity of hydrogen make it more likely to occur side flow or aggregation phenomena during the rapid transportation process in the pipeline. The lack of flow velocity control and air flow rectification means will further exacerbate this problem. In addition, to ensure the safety of the hydrogen blending transportation process, most of the prior technologies only rely on manual monitoring or a single pressure valve component. When the external environment or internal pressure of the pipeline is abnormal, it often cannot achieve rapid and automatic response, easily forming potential safety hazards.

[0005] Therefore, the present invention proposes a hydrogen addition device based on natural gas hydrogen blending to solve the deficiencies of the prior art. Summary of the Invention

[0006] Aiming at the deficiencies of the prior art, the present invention provides a hydrogen addition device based on natural gas hydrogen blending, which solves the problems of unstable flow velocity and uneven mixing during the hydrogen transportation process of the existing hydrogen addition device for natural gas hydrogen blending.

[0007] To achieve the above objectives, the present invention is realized through the following technical solutions: A hydrogen addition device based on natural gas hydrogen blending, comprising: A hydrogen tank for storing hydrogen. One end of the connecting pipe of the hydrogen tank is installed with a pressure reducing valve through a flange, and the end of the pressure reducing valve away from the connecting pipe is installed with a conveying pipe through a flange; A spoiler mechanism for optimizing the flow characteristics during hydrogen transportation; A hydrogen acceleration mechanism for accelerating the hydrogen flow rate; A nitrogen mechanism for providing a nitrogen barrier for the delivery pipe; A pressure relief mechanism for automatically releasing nitrogen when the nitrogen mechanism pressure is too high.

[0008] Preferably, the hydrogen acceleration mechanism includes a fixed ring fixedly connected to one end of the inside of the delivery pipe away from the connection pipe. A plurality of inclined sheets are equidistantly and fixedly connected to the inner side wall of the fixed ring, and positioning columns are fixedly connected to the adjacent sides of the plurality of inclined sheets.

[0009] Preferably, the spoiler mechanism includes a spoiler disk fixedly connected to one end of the inside of the delivery pipe close to the connection pipe. A plurality of honeycomb holes are formed in the inside of the spoiler disk.

[0010] Preferably, the nitrogen mechanism includes a nitrogen pipe fixedly connected to the outside of the delivery pipe. A storage cavity is formed in the inside of the nitrogen pipe.

[0011] Preferably, a gas filling port is communicated with the outside of the nitrogen pipe.

[0012] Preferably, the pressure relief mechanism includes an adapter pipe and an installation box. One end of the adapter pipe is communicated with the nitrogen pipe. The through hole at the bottom of the installation box is communicated with the end of the adapter pipe away from the nitrogen pipe. A moving disk is slidably connected to the through hole at the bottom of the installation box. A connecting rod is fixedly connected to the top of the moving disk. A moving plate is fixedly connected to the top of the connecting rod. A top plate is fixedly connected to the top of the moving plate. A pressure sensor is installed on the inner top wall of the installation box. A pressure relief pipe is communicated with the outside of the adapter pipe. An electromagnetic valve is installed on the outside of the pressure relief pipe.

[0013] Preferably, two guide rods are fixedly connected to the inner wall of the installation box. A return spring is sleeved on the outside of the guide rods. The return spring is fixedly connected between the top of the moving plate and the inner top wall of the installation box.

[0014] Preferably, the through hole inside the moving plate is slidably connected to the outside of the guide rods.

[0015] The present invention provides a hydrogenation device based on natural gas hydrogen blending, having the following beneficial effects: 1. The present invention combines the spoiler plate with the honeycomb holes to disperse the hydrogen gas flow and enhance the turbulence, optimize the flow characteristics, and achieve uniform and stable flow of hydrogen during transportation; by combining the fixed ring with the inclined plate, it guides the hydrogen to form a rotating gas flow, uses the central low-pressure area to generate suction to accelerate the hydrogen flow, and realizes the improvement of the hydrogen gas flow rate; the hydrogen gas after spoiler and acceleration treatment enters the natural gas storage container with a higher flow rate and more uniform distribution, realizing rapid and efficient mixing with natural gas, and improving the hydrogen blending efficiency and stability.

[0016] 2. The present invention fixes the nitrogen gas pipe on the outside of the delivery pipe, and fills nitrogen gas into the storage cavity through the gas filling port to form a nitrogen gas barrier. This nitrogen gas barrier helps to isolate hydrogen from the external environment, prevent hydrogen leakage, and provide necessary safety guarantees.

[0017] 3. The present invention combines the connecting pipe with the installation box to transfer the excessive nitrogen gas pressure to the internal structure of the installation box; through the sequential linkage of the moving disk, connecting rod, moving plate, and top plate to move upward, the top plate triggers the pressure sensor to control the solenoid valve to open the pressure relief pipe to release the excess nitrogen gas, realizing automatic pressure relief; through the compression and release of the return spring, the moving plate is pushed back to its original position to close the pressure relief channel. This structure realizes the dynamic regulation and recovery of the nitrogen gas pressure, forms a stable nitrogen gas barrier, effectively isolates hydrogen from the external air, reduces the risk of leakage and explosion, and significantly improves the safety of hydrogen blending. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a three-dimensional view of the present invention; Figure 2 is a rear view of the present invention; Figure 3 is a schematic structural view of the positioning column of the present invention; Figure 4 is a cross-sectional view of the delivery pipe and the nitrogen gas pipe of the present invention; Figure 5 is a schematic structural view of the spoiler mechanism of the present invention; Figure 6 is a schematic structural view of the nitrogen gas acceleration mechanism of the present invention; Figure 7 is a schematic structural view of the nitrogen gas mechanism of the present invention; Figure 8 is a schematic structural view of the pressure relief mechanism of the present invention.

[0019] Among them, 1. hydrogen gas tank; 2. connecting pipe; 3. pressure reducing valve; 4. delivery pipe; 5. flow disturbing mechanism; 501. flow disturbing disc; 502. honeycomb holes; 6. hydrogen gas accelerating mechanism; 601. fixing ring; 602. positioning column; 603. inclined sheet; 7. nitrogen gas mechanism; 701. nitrogen gas pipe; 702. storage cavity; 703. gas filling port; 8. pressure relief mechanism; 801. connecting pipe; 802. installation box; 803. moving disc; 804. connecting rod; 805. moving plate; 806. top plate; 807. pressure sensor; 808. pressure relief pipe; 809. solenoid valve; 8010. guide rod; 8011. return spring. Detailed implementation manners

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0021] Please refer to the atta Figure 1 - atta Figure 8 , the embodiment of the present invention provides a hydrogen addition device based on natural gas doped with hydrogen, including: A hydrogen gas tank 1 for storing hydrogen gas. One end of the connecting pipe 2 of the hydrogen gas tank 1 is installed with a pressure reducing valve 3 through a flange, and one end of the pressure reducing valve 3 away from the connecting pipe 2 is installed with a delivery pipe 4 through a flange; A flow disturbing mechanism 5 for optimizing the flow characteristics during the hydrogen gas delivery process; A hydrogen gas accelerating mechanism 6 for accelerating the hydrogen gas flow rate; A nitrogen gas mechanism 7 for providing a nitrogen gas barrier for the delivery pipe 4; A pressure relief mechanism 8 for automatically releasing nitrogen gas when the nitrogen gas mechanism 7 is at too high a pressure.

[0022] Specifically, through the hydrogen gas tank 1, the safe storage function of hydrogen gas is realized; through the cooperation of the connecting pipe 2 and the pressure reducing valve 3, the stored hydrogen gas is guided into the pressure reducing area, realizing the stable introduction of high-pressure hydrogen gas; through the cooperation of the pressure reducing valve 3 and the delivery pipe 4, the pressure adjustment is completed before the hydrogen gas enters the delivery stage, realizing the safe delivery of hydrogen gas at an appropriate pressure; through the hydrogen gas accelerating mechanism 6, the increase of the hydrogen gas flow rate is realized; through the flow disturbing mechanism 5, the optimization of the hydrogen gas flow state is realized; through the nitrogen gas mechanism 7, the safe isolation function during the hydrogen gas delivery process is realized; through the pressure relief mechanism 8, the automatic release function when the nitrogen gas pressure is abnormal is realized.

[0023] Please refer to the atta Figure 3 , atta Figure 4 and atta Figure 6, the hydrogen acceleration mechanism 6 includes a fixed ring 601 which is fixedly connected to the end of the inner part of the conveying pipe 4 far from the connecting pipe 2. A plurality of inclined sheets 603 are fixedly connected to the inner side wall of the fixed ring 601 at equal intervals, and a positioning column 602 is fixedly connected to the adjacent side of the plurality of inclined sheets 603.

[0024] Specifically, through the cooperation of the fixed ring 601 and the inclined sheets 603, the hydrogen is guided to form a rotational flow at a specific angle, and suction is generated by using the low-pressure area in the center of the air flow, effectively improving the hydrogen flow rate; Through the cooperation of the inclined sheets 603 and the positioning column 602, the direction of the rotational air flow is stabilized and the gas deviation is prevented, realizing the orderly control of the hydrogen flow path.

[0025] Please refer to the appendix Figure 4 - appendix Figure 5 , the turbulence mechanism 5 includes a turbulence disk 501 which is fixedly connected to the end of the inner part of the conveying pipe 4 close to the connecting pipe 2. A plurality of honeycomb holes 502 are formed in the inner side of the turbulence disk 501.

[0026] Specifically, through the cooperation of the turbulence disk 501 and the honeycomb holes 502, the incoming hydrogen flow is dispersed into multiple thin streams and turbulent flow is generated, optimizing the gas flow state and realizing the uniform and stable flow of hydrogen during transportation.

[0027] Please refer to the appendix Figure 1 , appendix Figure 4 and appendix Figure 7 , the nitrogen mechanism 7 includes a nitrogen pipe 701 which is fixedly connected to the outside of the conveying pipe 4. A storage cavity 702 is formed inside the nitrogen pipe 701, and a gas filling port 703 is communicated with the outside of the nitrogen pipe 701.

[0028] Specifically, through the cooperation of the nitrogen pipe 701 and the storage cavity 702, nitrogen is accommodated and maintained in a limited space, realizing the formation of a stable nitrogen barrier; through the cooperation of the storage cavity 702 and the gas filling port 703, nitrogen is supplemented by an external gas filling method, realizing the continuous supply and pressure regulation of the nitrogen barrier.

[0029] Please refer to the appendix Figure 1 , appendix Figure 2 and appendix Figure 8, the pressure relief mechanism 8 includes a connecting pipe 801 and a mounting box 802. One end of the connecting pipe 801 is connected to the nitrogen pipe 701 in communication. The bottom through hole of the mounting box 802 is connected to the end of the connecting pipe 801 away from the nitrogen pipe 701. A moving disk 803 is slidably connected at the bottom through hole of the mounting box 802. A connecting rod 804 is fixedly connected to the top of the moving disk 803. A moving plate 805 is fixedly connected to the top of the connecting rod 804. A top plate 806 is fixedly connected to the top of the moving plate 805. A pressure sensor 807 is installed on the inner top wall of the mounting box 802. A pressure relief pipe 808 is communicated with the outside of the connecting pipe 801. An electromagnetic valve 809 is installed on the outside of the pressure relief pipe 808. Two guide rods 8010 are fixedly connected to the inner wall of the mounting box 802. A return spring 8011 is sleeved on the outside of the guide rod 8010. The return spring 8011 is fixedly connected between the top of the moving plate 805 and the inner top wall of the mounting box 802. The inner through hole of the moving plate 805 is slidably connected to the outside of the guide rod 8010.

[0030] Specifically, through the cooperation of the connecting pipe 801 and the mounting box 802, the nitrogen pressure is guided into the interior of the mounting box 802, realizing the effective transfer of the system pressure; Through the cooperation of the mounting box 802 and the moving disk 803, when the pressure inside the nitrogen pipe 701 rises, the pressure is transmitted to the moving disk 803, and then the moving disk 803 is pushed to slide upward along the through hole; Through the cooperation of the moving disk 803 and the connecting rod 804, the generated force is transmitted upward, realizing the step-by-step conduction of the force; Through the cooperation of the connecting rod 804 and the moving plate 805, the moving plate 805 is driven to move along the guiding path, realizing the synchronous drive of the top plate 806; Through the cooperation of the moving plate 805 and the top plate 806, the top plate 806 moves upward to contact the pressure sensor 807, realizing the real-time triggering of the overpressure state; Through the cooperation of the pressure sensor 807 and the electromagnetic valve 809, after receiving the trigger signal, the electromagnetic valve 809 is controlled to open, realizing the on-off control of the pressure relief pipe 808; Through the cooperation of the electromagnetic valve 809 and the pressure relief pipe 808, when it is opened, the excess nitrogen in the storage cavity 702 is released, realizing the rapid release of the system pressure; Through the cooperation of the guide rod 8010 and the moving plate 805, the moving direction is restricted and sliding guidance is provided, realizing the smooth and orderly up and down sliding of the moving plate 805; Through the cooperation of the return spring 8011 and the inner top wall of the mounting box 802, after the pressure is released, a downward elastic force is applied to the moving plate 805, realizing the reset function of the top plate 806 moving away from the pressure sensor 807 and closing the pressure relief path.

[0031] Working principle: By moving the delivery pipe 4 away from the flange on the connecting pipe 2 and connecting it to the natural gas storage container, and by opening the valve on the hydrogen tank 1, the hydrogen stored in the hydrogen tank 1 flows through the connecting pipe 2 to the delivery pipe 4. During this process, the pressure reducing valve 3 adjusts the hydrogen pressure to an appropriate range; The hydrogen flows into the delivery pipe 4. The honeycomb holes 502 inside the spoiler disc 501 disperse the hydrogen gas flow, increasing the degree of turbulence and optimizing the flow characteristics, making the hydrogen flow more uniform and stable; The hydrogen passing through the honeycomb holes 502 moves towards the fixed ring 601. The inclined pieces 603 on the inner wall of the fixed ring 601 guide the hydrogen to form a rotating gas flow, and the suction force generated by the central low-pressure area is used to accelerate the hydrogen flow. Finally, the accelerated hydrogen enters the natural gas storage container. During this process, since the hydrogen has undergone spoiler optimization and acceleration treatment in the early stage, it can mix with natural gas more quickly and evenly when entering the container; The nitrogen pipe 701 is fixed on the outside of the delivery pipe 4. Nitrogen is filled into the storage cavity 702 through the gas filling port 703 to form a nitrogen barrier. This nitrogen barrier helps to isolate hydrogen from the external environment, prevent hydrogen leakage, and provide necessary safety guarantees; When the pressure in the nitrogen pipe 701 is too high, the pressure is transmitted through the connecting pipe 801 to the installation box 802, pushing the moving disc 803, connecting rod 804, moving plate 805, and top plate 806 upward. The top plate 806 triggers the pressure sensor 807, and the signal causes the solenoid valve 809 to open the pressure relief pipe 808 for pressure relief. At the same time, the return spring 8011 is compressed. After the pressure drops to the normal range, the return spring 8011 pushes the moving plate 805 to reset and closes the pressure relief pipe 808. The effective barrier formed by the appropriate nitrogen pressure can more accurately isolate hydrogen from the outside air, greatly reducing the risk of explosion caused by the mixture of leaked hydrogen and air, and significantly improving the safety of the hydrogen delivery environment.

[0032] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hydrogenation unit based on hydrogen-doped natural gas, characterized in that Comprising: A hydrogen tank (1) for storing hydrogen. One end of a connecting pipe (2) of the hydrogen tank (1) is installed with a pressure reducing valve (3) through a flange, and one end of the pressure reducing valve (3) away from the connecting pipe (2) is installed with a delivery pipe (4) through a flange; A flow disturbing mechanism (5) for optimizing the flow characteristics during hydrogen delivery; A hydrogen acceleration mechanism (6) for accelerating the hydrogen flow rate; A nitrogen mechanism (7) for providing a nitrogen barrier for the delivery pipe (4); A pressure relief mechanism (8) for automatically releasing nitrogen when the nitrogen mechanism (7) is at too high a pressure.

2. The hydrogenation device based on hydrogen-doped natural gas according to claim 1, wherein The hydrogen acceleration mechanism (6) includes a fixing ring (601) fixedly connected to the inner end of the delivery pipe (4) away from the connecting pipe (2). A plurality of inclined sheets (603) are fixedly connected to the inner side wall of the fixing ring (601) at equal intervals, and a positioning column (602) is fixedly connected to the adjacent side of the plurality of inclined sheets (603).

3. The hydrogenation device based on hydrogen-doped natural gas according to claim 1, wherein The flow disturbing mechanism (5) includes a flow disturbing disc (501) fixedly connected to the inner end of the delivery pipe (4) close to the connecting pipe (2). A plurality of honeycomb holes (502) are formed in the inner side of the flow disturbing disc (501).

4. The hydrogenation device based on hydrogen-doped natural gas according to claim 1, characterized in that, The nitrogen mechanism (7) includes a nitrogen pipe (701) fixedly connected to the outer side of the delivery pipe (4). A storage cavity (702) is formed in the inner part of the nitrogen pipe (701).

5. The hydrogenation device based on hydrogen-doped natural gas according to claim 4, wherein, An air filling port (703) is communicated with the outer side of the nitrogen pipe (701).

6. The hydrogenation device based on natural gas hydrogen blending according to claim 1, characterized in that The pressure relief mechanism (8) includes an adapter pipe (801) and a mounting box (802). One end of the adapter pipe (801) is communicated with the nitrogen pipe (701). The through hole at the bottom of the mounting box (802) is communicated with the end of the adapter pipe (801) away from the nitrogen pipe (701). A moving disc (803) is slidably connected to the through hole at the bottom of the mounting box (802). A connecting rod (804) is fixedly connected to the top of the moving disc (803). A moving plate (805) is fixedly connected to the top of the connecting rod (804). A top plate (806) is fixedly connected to the top of the moving plate (805). A pressure sensor (807) is installed on the inner top wall of the mounting box (802). A pressure relief pipe (808) is communicated with the outer side of the adapter pipe (801). An electromagnetic valve (809) is installed on the outer side of the pressure relief pipe (808).

7. The hydrogenation device based on natural gas hydrogen blending according to claim 6, wherein, Two guide rods (8010) are fixedly connected to the inner wall of the mounting box (802). A return spring (8011) is sleeved on the outer side of the guide rods (8010). The return spring (8011) is fixedly connected between the top of the moving plate (805) and the inner top wall of the mounting box (802).

8. The hydrogenation device based on natural gas hydrogen blending according to claim 7, characterized in that, The inner through hole of the moving plate (805) is slidably connected to the outer side of the guide rods (8010).

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