Natural gas hydrogen-doped mixer

Abstract

The utility model discloses a natural gas hydrogen-doped mixer which comprises a pre-mixing pipe, a mixing mechanism is arranged on the outer side of the pre-mixing pipe and used for mixing natural gas and hydrogen, the mixing mechanism comprises a pre-mixing assembly, and the utility model relates to the technical field of natural gas hydrogen-doped mixing. According to the natural gas hydrogen-doped mixer, the mixing uniformity of natural gas and hydrogen can be improved through the arranged connecting pipe and guide vanes, when the natural gas hydrogen-doped mixer is used, hydrogen and natural gas are premixed through a premixing assembly and a premixing pipe, then mixed gas enters the connecting pipe, and at the moment, the mixed gas forms turbulent flow gas through the guide vanes; the static mixer has the advantages that gas stratosphere distribution is disturbed, mixing is realized while a gas flow channel is changed, four groups of frames are arranged, four times of mixing can be completed in a cross flow channel in the static mixer, finally, uniform mixing of the gas is completed, the layering phenomenon of the mixed gas is reduced, and the use safety of gas utilization equipment is improved.

Description

Technical Field

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

[0002] With the deepening of the "dual-carbon" strategy, society's demand for clean energy is growing. Hydrogen energy, as a zero-emission energy carrier, will become an important component of the future national energy system. Natural gas blending technology is of great significance to the development of hydrogen energy. The principle of this technology is to mix hydrogen with natural gas and transport it to end users through natural gas pipelines, promoting deep carbon reduction in industries, buildings, and other fields. Secondly, this technology is beneficial to ensuring energy security; as a supplement to natural gas resources, hydrogen energy can reduce my country's dependence on imported natural gas.

[0003] Referring to the natural gas-hydrogen blending structure disclosed in patent application CN221182347U, at least one set of baffle assemblies is provided on the inner wall of the first chamber. Each baffle assembly consists of an upper baffle and a lower baffle, which are arranged alternately and located on the upper and lower sides of the first chamber, respectively. The function of the baffles is to change the flow direction and path of the gas or fluid in the chamber. By staggering the upper and lower baffles, the mixing and turbulence effects of the fluid can be effectively increased, making the mixer more efficient. When the gas or fluid passes through, natural gas and hydrogen can be uniformly mixed through this structure, and the mixed gas is discharged through the outlet pipe. When the hydrogen pressure exceeds the set value, the pressure relief port and the safety valve work together to release the excess hydrogen into the storage tank, preventing hydrogen overflow and ensuring safety and environmental protection.

[0004] However, the above-mentioned technology uses a baffle assembly to mix hydrogen and natural gas. The mixture is then discharged into the pipeline. Hydrogen and methane have significantly different properties, especially in terms of combustion performance. If the mixing uniformity of the two gases is low, or if stratification occurs in the downstream pipeline, it will cause disturbances in the Wobbe number and combustion potential of the mixed gas. Both gases are flammable and explosive media, which can easily affect the safety of gas-using equipment. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a natural gas hydrogen blending mixer, which solves the problem that existing natural gas hydrogen blending mixers may cause stratification in the downstream pipeline after mixing and discharging the mixture, which can easily affect the safety of gas-using equipment.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a natural gas-hydrogen blender, comprising a premixing pipe, wherein a mixing mechanism is provided on the outer side of the premixing pipe for mixing natural gas and hydrogen, the mixing mechanism comprising:

[0007] A premixing assembly, located on the top surface of the premixing tube, is used to inject hydrogen gas to mix with the natural gas inside the premixing tube;

[0008] A static mixing assembly is located on the right side of the premixing pipe to uniformly mix the premixed gas again. The right end flange of the premixing pipe is connected to a connecting pipe for conveying the mixed gas. A limit ring is movably installed inside the connecting pipe. Four horizontal plates are fixedly installed on the right side of the limit ring. A connecting cylinder is fixedly installed on the right end of the four horizontal plates to limit the position of the four horizontal plates.

[0009] The limiting component is installed inside the connecting pipe to fix the position of the limiting ring and improve the stability of the limiting ring.

[0010] Preferably, the premixing assembly includes a hydrogen pipe fixedly installed on the top surface of the premixing tube for conveying hydrogen, and a connecting head fixedly installed at the bottom end of the hydrogen pipe, with several air holes on the outside of the connecting head to spray hydrogen at multiple angles.

[0011] Preferably, the bottom end of the hydrogen pipe penetrates the top surface of the premixing pipe and is fixedly installed at one end of the connector to mix the hydrogen with the natural gas flowing through the premixing pipe.

[0012] Preferably, the static mixing assembly further includes four frames fixedly installed on the inner sides of the four horizontal plates, and four guide vanes are fixedly installed on the inner sides of each of the four frames to form turbulent gas and disrupt the gas stratosphere distribution.

[0013] Preferably, the limiting component includes a fixing ring fixedly installed on the left end of the inner side of the connecting pipe to limit the lateral position of the fixing ring. A limiting groove is formed on the right side of the fixing ring, and a baffle is fixedly installed on the right side of the limiting groove. An arc plate is fixedly installed on the left side of the limiting ring. A bolt is threaded on the top surface of the inner side of the connecting cylinder, and the top thread of the bolt penetrates the inner side of the connecting cylinder and extends into the interior of the connecting pipe to fix the position of the connecting cylinder.

[0014] Preferably, the left side of the arc plate is movably installed inside the limiting groove, and the right side of the arc plate is closely attached to the left side of the baffle to position the limiting ring.

[0015] This invention provides a natural gas hydrogen blending mixer. Compared with the prior art, it has the following advantages:

[0016] (1) The natural gas-hydrogen blending mixer can improve the uniformity of natural gas and hydrogen mixing through the connecting pipe and guide vanes. During use, hydrogen and natural gas are premixed through the premixing component and the premixing pipe. Then the mixed gas enters the interior of the connecting pipe. At this time, the mixed gas forms turbulent gas through the guide vanes, which disrupts the gas stratosphere distribution and achieves mixing while changing the gas flow channel. The frame is set with four sets, which means that four mixings will be completed in the cross-flow channel in the static mixer, and finally the gas is uniformly mixed, reducing the occurrence of mixed gas stratification and improving the safety of gas-using equipment.

[0017] (2) The natural gas hydrogen blending mixer is designed with an arc plate and bolts to facilitate the disassembly and cleaning of the guide vanes. When disassembly is required, rotate the bolts to unscrew them from the inside of the connecting pipe. Then rotate the connecting cylinder to drive the arc plate to rotate so that it moves away from the left side of the baffle. Then, pull the connecting cylinder to pull the arc plate out of the limiting groove so that the guide vanes can be pulled out of the inside of the connecting pipe for cleaning. It is convenient, quick and practical. Attached Figure Description

[0018] Figure 1 This is a three-dimensional appearance schematic diagram of the present utility model;

[0019] Figure 2 This is a three-dimensional appearance diagram of the premixed component of this utility model;

[0020] Figure 3 This is a three-dimensional cross-sectional view of the premixed component of this utility model;

[0021] Figure 4 This is a three-dimensional appearance diagram of the static hybrid component of this utility model;

[0022] Figure 5 This is a partial cross-sectional three-dimensional appearance diagram of the static mixing component of this utility model;

[0023] Figure 6 This is a partial three-dimensional appearance schematic diagram of the static mixing component of this utility model.

[0024] In the diagram: 1-Premixing pipe, 2-Mixing mechanism, 21-Premixing component, 211-Hydrogen pipe, 212-Connecting head, 213-Gas hole, 22-Static mixing component, 221-Connecting pipe, 222-Limiting ring, 223-Guide vane, 224-Frame, 225-Horizontal plate, 226-Connecting cylinder, 23-Limiting component, 231-Limiting groove, 232-Arc plate, 233-Baffle, 234-Fixing ring, 235-Bolt. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] See Figures 1-6 This utility model provides two technical solutions:

[0027] First embodiment: Natural gas-hydrogen blender, including a premixing pipe 1, with a mixing mechanism 2 disposed on the outside of the premixing pipe 1 for mixing natural gas and hydrogen, the mixing mechanism 2 including:

[0028] The premixing component 21 is disposed on the top surface of the premixing pipe 1 for injecting hydrogen gas to mix with the natural gas inside the premixing pipe 1;

[0029] A static mixing component 22 is located on the right side of the premixing pipe 1 to uniformly mix the premixed gas again. The right end flange of the premixing pipe 1 is connected to a connecting pipe 221 for conveying the mixed gas. A differential pressure transmitter is installed on the outside of the connecting pipe 221 to monitor the pressure loss in real time. A limit ring 222 is movably installed inside the connecting pipe 221. Four horizontal plates 225 are fixedly installed on the right side of the limit ring 222. The four horizontal plates 225 are evenly distributed in a circle on the right side of the limit ring 222. A connecting cylinder 226 is fixedly installed on the right end of the four horizontal plates 225 to limit the position of the four horizontal plates 225.

[0030] A limiting component 23, disposed inside the connecting pipe 221, is used to fix the position of the limiting ring 222 and improve the stability of the limiting ring 222. The premixing component 21 includes a hydrogen pipe 211 fixedly installed on the top surface of the premixing pipe 1 for conveying hydrogen. The bottom end of the hydrogen pipe 211 inside the premixing pipe 1 is bent to the left. A connecting head 212 is fixedly installed at the bottom end of the hydrogen pipe 211. Several air holes 213 are opened on the outside of the connecting head 212 to spray hydrogen at multiple angles. The bottom end of the hydrogen pipe 211 penetrates the top surface of the premixing pipe 1 and is fixedly installed at one end of the connecting head 212 for conveying hydrogen. Hydrogen is mixed with natural gas flowing through premixing pipe 1. The static mixing assembly 22 also includes four frames 224 fixedly installed inside four horizontal plates 225. The four frames 224 are octagonal. Four guide vanes 223 are fixedly installed inside each of the four frames 224 to form turbulent gas and disrupt the gas stratosphere distribution. The four guide vanes 223 will complete four mixing processes in the cross-flow channel in the connecting pipe 221, and finally achieve uniform gas mixing, reducing the occurrence of mixed gas stratification. All materials in contact with the gas in this device are made of hydrogen-resistant stainless steel.

[0031] The uniformity of the natural gas and hydrogen mixture can be improved by using the connecting pipe 221 and the guide vanes 223. During use, the hydrogen and natural gas are premixed through the premixing component 21 and the premixing pipe 1. Then, the mixed gas enters the interior of the connecting pipe 221. At this time, the mixed gas forms turbulent gas through the guide vanes 223, which disrupts the gas stratosphere distribution and achieves mixing while changing the gas flow channel. The frame 224 is equipped with four sets, which means that four mixing processes are completed in the cross-flow channel in the static mixer, and finally, the gas is uniformly mixed, reducing the occurrence of gas stratification and improving the safety of gas-using equipment.

[0032] The second embodiment differs from the first embodiment in that: the limiting component 23 includes a fixing ring 234 fixedly installed on the left side of the inner side of the connecting pipe 221 to limit the lateral position of the fixing ring 234. A limiting groove 231 is formed on the right side of the fixing ring 234, and a baffle 233 is fixedly installed on the right side of the limiting groove 231. The baffle 233 is arc-shaped and installed below the right side of the limiting groove 231. An arc plate 232 is fixedly installed on the left side of the limiting ring 222, and the cross-section of the arc plate 232 after unfolding is L-shaped, connecting the top surface of the inner side of the connecting cylinder 226. A bolt 235 is threadedly installed, and the threaded tip of the bolt 235 penetrates the inner side of the connecting cylinder 226 and extends into the interior of the connecting pipe 221 to fix the position of the connecting cylinder 226. The left side of the arc plate 232 is movably installed inside the limiting groove 231. When the limiting ring 222 is rotated so that the limiting groove 231 is above the limiting groove 231, the limiting ring 222 can be pulled to drive the arc plate 232 out of the limiting groove 231 for disassembly. The right side of the arc plate 232 is close to the left side of the baffle 233 to position the limiting ring 222.

[0033] The guide vane 223 can be easily disassembled and cleaned using the arc plate 232 and bolt 235. When disassembly is required, rotate the bolt 235 to unscrew it from the inside of the connecting pipe 221. Then, rotate the connecting cylinder 226 to rotate the arc plate 232 so that it moves away from the left side of the baffle 233. Then, pull the connecting cylinder 226 to pull the arc plate 232 out of the limiting groove 231, and then pull out the inside of the connecting pipe 221 to clean the guide vane 223. It is convenient, quick and practical.

[0034] Furthermore, all content not described in detail in this specification is existing technology known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited; conventional equipment can be used.

[0035] In use, the operator installs the device in a suitable location, then connects the hydrogen pipe 211 to the hydrogen external pipe, and connects the left end of the premixing pipe 1 to the gas pipe. Hydrogen then enters the connecting head 212 through the hydrogen pipe 211 and is ejected from the gas hole 213, where it undergoes its first mixing with the parallel and perpendicular flowing natural gas, completing the initial gas premixing. The mixed gas then enters the interior of the connecting pipe 221, where it forms turbulent gas through the guide vanes 223, disrupting the gas stratosphere distribution and achieving mixing while changing the airflow channel. Meanwhile, the frame 224... There are four sets of mixing, which means that the mixing will be completed four times in the cross-flow channel in the static mixer, and the gas will be uniformly mixed in the end, reducing the occurrence of gas stratification. Then it enters the gas-using equipment. When it is necessary to clean the guide vane 223, rotate the bolt 235 to unscrew it from the inside of the connecting pipe 221. Then rotate the connecting cylinder 226 to drive the arc plate 232 to rotate so that it moves away from the left side of the baffle 233. Then, the connecting cylinder 226 can be pulled to pull the arc plate 232 out of the limiting groove 231, and then the connecting pipe 221 can be pulled out to clean the guide vane 223.

[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A natural gas hydrogen blending mixer, comprising a premixing pipe (1), characterized in that: A mixing mechanism (2) is provided on the outside of the premixing pipe (1) for mixing natural gas and hydrogen. The mixing mechanism (2) includes: A premixing assembly (21) is installed on the top surface of the premixing tube (1) for injecting hydrogen gas to mix with the natural gas inside the premixing tube (1); A static mixing component (22) is set on the right side of the premixing pipe (1) to uniformly mix the premixed gas again. The right end flange of the premixing pipe (1) is connected to a connecting pipe (221) for conveying the mixed gas. A limiting ring (222) is movably installed inside the connecting pipe (221). Four horizontal plates (225) are fixedly installed on the right side of the limiting ring (222). A connecting tube (226) is fixedly installed on the right end of the four horizontal plates (225) to limit the position of the four horizontal plates (225). The limiting component (23) is set inside the connecting pipe (221) to fix the position of the limiting ring (222) and improve the stability of the limiting ring (222).

2. The hydrogen-enriched natural gas mixer of claim 1, wherein: The premixing assembly (21) includes a hydrogen pipe (211) fixedly installed on the top surface of the premixing pipe (1) for conveying hydrogen. A connecting head (212) is fixedly installed at the bottom end of the hydrogen pipe (211), and several air holes (213) are opened on the outside of the connecting head (212) to spray hydrogen at multiple angles.

3. The hydrogen-enriched natural gas mixer of claim 2, wherein: The bottom end of the hydrogen pipe (211) penetrates the top surface of the premixing pipe (1) and is fixedly installed at one end of the connector (212) to mix hydrogen with the natural gas flowing through the premixing pipe (1).

4. The hydrogen-enriched natural gas mixer of claim 1, wherein: The static mixing component (22) also includes four frames (224) fixedly installed inside the four horizontal plates (225), and four guide vanes (223) are fixedly installed inside the four frames (224) to form turbulent gas and disrupt the gas stratosphere distribution.

5. The hydrogen-enriched natural gas mixer of claim 1, wherein: The limiting component (23) includes a fixing ring (234) fixedly installed on the left side of the inner side of the connecting pipe (221) to limit the lateral position of the limiting ring (222). A limiting groove (231) is opened on the right side of the fixing ring (234). A baffle (233) is fixedly installed on the right side of the limiting groove (231). An arc plate (232) is fixedly installed on the left side of the limiting ring (222). A bolt (235) is threaded on the top surface of the inner side of the connecting cylinder (226), and the top thread of the bolt (235) penetrates the inner side of the connecting cylinder (226) and extends into the interior of the connecting pipe (221) to fix the position of the connecting cylinder (226).

6. The hydrogen-enriched natural gas mixer of claim 5, wherein: The left side of the arc plate (232) is movably installed inside the limiting groove (231), and the right side of the arc plate (232) is closely attached to the left side of the baffle (233) to position the limiting ring (222).

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