CN114542977A - Natural gas hydrogen-mixing device - Google Patents
Natural gas hydrogen-mixing device Download PDFInfo
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- CN114542977A CN114542977A CN202210187794.1A CN202210187794A CN114542977A CN 114542977 A CN114542977 A CN 114542977A CN 202210187794 A CN202210187794 A CN 202210187794A CN 114542977 A CN114542977 A CN 114542977A
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- natural gas
- pipeline
- venturi tube
- inlet
- loading device
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 184
- 239000003345 natural gas Substances 0.000 title claims abstract description 91
- 238000002156 mixing Methods 0.000 title claims abstract description 44
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 53
- 239000001257 hydrogen Substances 0.000 claims abstract description 52
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 52
- 238000007789 sealing Methods 0.000 claims description 18
- 230000008602 contraction Effects 0.000 claims description 4
- 230000008901 benefit Effects 0.000 abstract description 5
- 230000000694 effects Effects 0.000 description 8
- 239000007789 gas Substances 0.000 description 6
- 238000004891 communication Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 150000002431 hydrogen Chemical class 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000009466 transformation Effects 0.000 description 4
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 3
- 229910052731 fluorine Inorganic materials 0.000 description 3
- 239000011737 fluorine Substances 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 239000003292 glue Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000002737 fuel gas Substances 0.000 description 2
- 210000001503 joint Anatomy 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000037452 priming Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 238000010146 3D printing Methods 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 210000003734 kidney Anatomy 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 229920001778 nylon Polymers 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
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Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/02—Pipe-line systems for gases or vapours
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/14—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid
- F04F5/16—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing elastic fluids
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/14—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid
- F04F5/36—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid characterised by using specific inducing fluid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/44—Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/12—Arrangements for supervising or controlling working operations for injecting a composition into the line
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/45—Hydrogen technologies in production processes
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
Abstract
The invention discloses a natural gas hydrogen-loading device, which comprises a pipeline, a Venturi tube and a rectifying plate, wherein the pipeline comprises a main pipeline and a branch pipeline which are communicated, the Venturi tube is matched in the main pipeline and closes openings at two ends of the main pipeline, a middle cavity is formed between the outer surface of the Venturi tube and the inner surface of the main pipeline and is communicated with the branch pipeline, the Venturi tube is provided with an inlet which is communicated with the middle cavity and an inner cavity of the Venturi tube, one of the inlet end of the Venturi tube and the inlet end of the branch pipeline is communicated with the natural gas pipeline, the other one of the inlet end of the Venturi tube and the inlet end of the branch pipeline is communicated with a hydrogen pipeline, the rectifying plate is arranged at the outlet end of the Venturi tube, and the rectifying plate is provided with a plurality of rectifying holes. The natural gas hydrogen-loading device provided by the invention has the advantages of low cost and high mixing uniformity.
Description
Technical Field
The invention relates to the technical field of fuel blending, in particular to a natural gas hydrogen-blending device.
Background
The method is characterized in that hydrogen is mixed into natural gas and is conveyed through an existing natural gas long-distance pipeline network or a city combustion pipeline network, or the hydrogen is supplied through a nearby hydrogen source in a pipeline manner, and finally the hydrogen is utilized by an end user at a large scale and at a low cost. The natural gas hydrogen-loading device in the related technology has the problems of high cost and low blending uniformity.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, the embodiment of the invention provides a natural gas loading device which has the advantages of low cost and high blending uniformity.
The natural gas loading device comprises a pipeline, a Venturi tube and a rectifying plate, wherein the pipeline comprises a main pipeline and a branch pipeline which are communicated; the venturi tube is matched in the main pipeline and closes openings at two ends of the main pipeline, a middle cavity is formed between the outer surface of the venturi tube and the inner surface of the main pipeline, the middle cavity is communicated with the branch pipeline, an inlet communicated with the middle cavity and the inner cavity of the venturi tube is arranged on the venturi tube, one of the inlet end of the venturi tube and the inlet end of the branch pipeline is communicated with the natural gas pipeline, and the other one of the inlet end of the venturi tube and the inlet end of the branch pipeline is communicated with the hydrogen pipeline; the rectifying plate is arranged at the outlet end of the Venturi tube, and a plurality of rectifying holes are formed in the rectifying plate.
According to the natural gas hydrogen-mixing device provided by the embodiment of the invention, natural gas flows into the inner cavity of the Venturi tube through the natural gas pipeline, meanwhile, hydrogen enters the middle cavity of the Venturi tube through the hydrogen pipeline and the branch pipeline and enters the inner cavity of the Venturi tube through the inlet, the natural gas and the hydrogen are mixed at the position, the purpose of natural gas hydrogen mixing is realized, then, the mixed gas flows to the outlet end of the Venturi tube, and the rectifying plate arranged at the position further promotes the mixing of the hydrogen and the natural gas, so that the mixing uniformity between the hydrogen and the natural gas is improved.
Secondly, compare in the correlation technique blending device and need generally carry out extensive transformation to original pipeline, even need be equipped with special fuel blending system, the natural gas loading device in this embodiment can be connected with original pipeline, utilizes parts such as valve, flowmeter that have had in original pipeline to a great extent, greatly reduced the economic cost of blending pipeline transformation to reduce the cost in aspects such as design, use, maintenance of natural gas loading device, can realize mass production, do benefit to extensive popularization and application.
In some embodiments, the venturi tube includes an inlet pipe section, a contraction pipe section, a throat, a ring plate and a divergent pipe section which are connected in sequence, the movable end of the inlet pipe section seals one end opening of the main pipe and constitutes the inlet end of the venturi tube, the movable end of the divergent pipe section seals two end openings of the main pipe and constitutes the outlet end of the venturi tube, and the inlet is arranged on the ring plate.
In some embodiments, the inlet comprises a plurality of through holes spaced circumferentially around the annular plate.
In some embodiments, a plurality of the rectifying holes are uniformly distributed on the rectifying plate, and the cross-sectional shape of the rectifying holes is any one of circular, square, prismatic and hexagonal; or, the rectifying plate is of a grid structure, and a plurality of rectifying holes are formed around the grid structure.
In some embodiments, there are a plurality of the flow straightening plates, and the plurality of the flow straightening plates are all arranged in the divergent pipe section and are arranged at intervals along the axial direction of the main pipe.
In some embodiments, the longitudinal sectional line of the wall surface of each of the inlet tube section, the convergent tube section, the throat, and the divergent tube section is a victoris curve.
In some embodiments, the outer wall surface of the inlet pipe section is provided with a first annular groove, the outer wall surface of the divergent pipe section is provided with a second annular groove, and the natural gas loading device further comprises a first sealing ring matched in the first annular groove and a second sealing ring matched in the second annular groove.
In some embodiments, the main pipe includes a first flange portion for connection to a natural gas pipe and a second flange portion for connection to a mixing pipe.
In some embodiments, the branch conduit includes a third flange portion for connection with the hydrogen gas conduit.
In some embodiments, the first flange portion, the second flange portion and the third flange portion each have a connection hole, and the cross-sectional shape of the connection hole is kidney-shaped or long-strip-shaped.
Drawings
Fig. 1 is a schematic front sectional view of a natural gas loading apparatus according to an embodiment of the present invention.
Fig. 2 is a schematic sectional view of a pipeline of a natural gas loading apparatus according to an embodiment of the present invention.
Fig. 3 is a schematic cross-sectional view of a venturi tube of a natural gas loading apparatus according to an embodiment of the present invention.
Fig. 4 is a schematic view of a ring plate of a natural gas loading device according to an embodiment of the present invention.
Fig. 5 is a schematic view of a flow straightener of a natural gas loading device according to an embodiment of the invention.
Fig. 6 is still another schematic view of a flow straightener of a natural gas loading device according to an embodiment of the invention.
Reference numerals: 1. a pipeline; 11. a main pipeline; 111. a first flange portion; 1111. a first O-ring; 112. a second flange portion; 1121. a second O-ring; 12. branch pipelines; 121. a third flange portion; 1211. a third O-ring;
2. a venturi tube; 21. an inlet pipe section; 211. a first seal ring; 22. shrinking the pipe section; 23. a throat; 24. a ring plate; 241. a through hole; 25. a divergent pipe section; 251. a second seal ring;
3. a rectifying plate; 31. a flow rectifying hole;
4. an intermediate chamber;
5. an inner cavity.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are illustrative and intended to explain the present invention and should not be construed as limiting the present invention.
A natural gas loading apparatus according to an embodiment of the present invention will be described below with reference to fig. 1 to 6.
As shown in fig. 1, a natural gas loading apparatus according to an embodiment of the present invention includes a pipe 1, a venturi tube 2, and a rectifying plate 3. The pipe 1 comprises a main pipe 11 and a branch pipe 12 which are communicated with each other. Venturi 2 cooperates in trunk line 11 and seals the both ends opening of trunk line 11, constitutes middle chamber 4 between venturi 2's the surface and trunk line 11's the internal surface, and middle chamber 4 is linked together with small transfer line 12, is equipped with the entry of intercommunication middle chamber 4 and venturi 2's inner chamber 5 on venturi 2, one in venturi 2's the entry end and the entry end of small transfer line 12 and natural gas line intercommunication, another and hydrogen pipeline intercommunication. The rectifying plate 3 is arranged at the outlet end of the Venturi tube 2, and a plurality of rectifying holes 31 are formed in the rectifying plate 3.
Illustratively, the inlet end of the venturi tube 2 is in communication with a natural gas pipeline, and the inlet end of the branch pipeline 12 is in communication with a hydrogen gas pipeline.
According to the natural gas loading device provided by the embodiment of the invention, firstly, the flow rate of the natural gas and the flow rate of the hydrogen are calculated according to the required mixing proportion, and the valves of the natural gas pipeline and the hydrogen pipeline at the upstream of the natural gas loading device are adjusted.
Afterwards, the natural gas flows into venturi 2's inner chamber 5 through natural gas line, and meanwhile, hydrogen is through hydrogen pipeline, branch pipe 12 gets into venturi 2's middle chamber 4, get into venturi 2's inner chamber 5 through the entry again, and here, the natural gas is accomplished with hydrogen and is mixed, has realized the purpose that the natural gas was mixed hydrogen, afterwards, the exit end of mist flow direction venturi 2, the cowling panel 3 of locating here further promotes the mixture of hydrogen and natural gas, with the mixing degree of consistency that improves between the two.
Secondly, compare in the correlation technique blending device and need generally carry out extensive transformation to original pipeline, even need be equipped with special fuel blending system, the natural gas loading device in this embodiment can be connected with original pipeline, utilizes parts such as valve, flowmeter that have had in original pipeline to a great extent, greatly reduced the economic cost of blending pipeline transformation to reduce the cost in aspects such as design, use, maintenance of natural gas loading device, can realize mass production, do benefit to extensive popularization and application.
In addition, the natural gas flow in venturi 2 forms the negative pressure in the entry position, realizes the self priming to hydrogen, the mixing between the two of being convenient for, simultaneously, this self priming has accelerated the flow of hydrogen, has improved its velocity of flow, makes hydrogen mix with the natural gas with the mode of drawing the penetrating, has realized the effect that hydrogen gos deep into the inlayer of natural gas, has improved the degree of consistency of mixing.
Specifically, main pipeline 11 and natural gas line can dismantle the connection, and branch pipeline 12 and hydrogen pipeline can dismantle the connection, and the dismouting and the change of the whole device of being convenient for have improved the commonality of whole device.
The pipeline 1 is made of seamless steel pipes, and the specific pipe can be 20# steel or Q345D, so that the pipeline 1 has good toughness, plasticity and weldability, and the risk of hydrogen damage during conveying of fuel gas containing hydrogen is low.
Specifically, the natural gas pipeline size was DN32, and the hydrogen pipeline size was DN 15.
For the sake of easy understanding, the arrow a in fig. 1 shows the left-right direction of the natural gas loading apparatus.
In some embodiments, as shown in fig. 3, the venturi tube 2 includes an inlet tube section 21, a converging tube section 22, a throat 23, a ring plate 24 and a diverging tube section 25 connected in sequence, the movable end of the inlet tube section 21 closes one end opening of the main tube 11 and forms an inlet end of the venturi tube 2, the movable end of the diverging tube section 25 closes two end openings of the main tube 11 and forms an outlet end of the venturi tube 2, and the inlet is disposed on the ring plate 24.
The natural gas flows in from the inlet pipe section 21, when the natural gas passes through the contraction pipe section 22, the drift diameter of the natural gas is gradually reduced, the speed of the natural gas is continuously increased, after the natural gas enters the throat pipe 23, the flow rate of the natural gas reaches the maximum, according to Bernoulli's theorem, the pressure of the natural gas at the position is the minimum, then, the natural gas passes through the annular plate 24, hydrogen is sucked in through the inlet, and the mixing process is completed.
The setting up of annular middle chamber 4 makes the latus rectum of the hydrogen that flows in by branch pipe 12 grow suddenly, then makes hydrogen deceleration and step up, has further improved the pressure difference between the hydrogen of natural gas and middle chamber 4 in the inner chamber 5 to promote drawing of hydrogen and penetrated speed, improved the mixing effect between natural gas and the hydrogen.
Wherein, the annular plate 24 is sleeved on the throat 23, the end with smaller diameter of the upper cross section of the gradually expanding pipe section 25 is coaxially welded with the annular plate 24 or integrally formed, and the two processing modes have the effects of stable connection and convenient operation.
Wherein, the communication position of the main pipeline 11 and the branch pipeline 12 is positioned at the left side of the inlet, which is convenient for the flow of hydrogen; or the communication position of the main pipeline 11 and the branch pipeline 12 is opposite to the annular plate 24 along the radial direction, so that hydrogen flows conveniently, air resistance is reduced, and the injection speed is increased.
Wherein, each of the inlet pipe section 21, the contraction pipe section 22, the throat 23 and the divergent pipe section 25 selects high-performance nylon as the material and is formed by 3D printing, the cost is low, the manufacture is easy, and the disassembly, the assembly and the replacement are convenient.
Wherein, venturi 2's exit end and mixing pipe 1 intercommunication, the internal diameter of entry pipeline section 21 equals with natural gas line's internal diameter, and the internal diameter of divergent pipeline section 25 right-hand member equals with mixing pipe 1's internal diameter, and the design makes each parts installation back of finishing like this, and venturi 2's the left and right sides receives natural gas line and mixing pipe 1's spacing respectively, has further improved venturi 2's fixed effect, has ensured the smooth operation of device.
In some embodiments, as shown in FIG. 4, the inlet includes a plurality of through holes 241 spaced circumferentially around the ring plate 24 to facilitate hydrogen gas flow.
Specifically, the cross-sectional shape of the through-hole 241 is a sector, and the flux of hydrogen gas can be maximally increased on the basis of ensuring the structural strength of the ring plate 24.
Specifically, a plurality of through-holes 241 are distributed at equal intervals along the circumference of the ring plate 24, so that the hydrogen is divided into a plurality of strands and injected into the natural gas along all directions, the mixing uniformity is further improved, and in some optional implementations, the number of the through-holes 241 is 8.
Specifically, the thickness of the ring plate 24 is 5mm, the structural strength of the ring plate is increased, and in addition, the ring plate 24 also has the effect of guiding the hydrogen.
In some embodiments, as shown in fig. 5 and 6, a plurality of rectifying holes 31 are uniformly distributed on the rectifying plate 3, and the cross-sectional shape of the rectifying holes 31 is any one of circular, square, prismatic, and hexagonal; alternatively, the rectifying plate 3 has a lattice structure in which a plurality of rectifying holes 31 are formed around the lattice.
The arrangement makes the blending of the hydrogen and the natural gas more uniform, and further improves the blending uniformity between the hydrogen and the natural gas. It is understood that the cross-sectional shape of the rectifying hole 31 may be triangular, rectangular, or other shapes, and the embodiment is not limited thereto.
In some embodiments, as shown in fig. 3, there are a plurality of flow straightener 3, and a plurality of flow straighteners 3 are arranged in the divergent section 25 and are arranged at intervals in the axial direction of the main conduit 11.
The provision of a plurality of flow straightening holes 31 further enhances mixing between the hydrogen and the natural gas.
Specifically, the thickness of the single current plate 3 is 1 mm.
In some embodiments, the longitudinal sectional line of the wall of each of the inlet tube section 21, the convergent tube section 22, the throat 23, and the divergent tube section 25 is a victoris curve.
The design makes the wall smooth, and the gas can flow evenly at the movable end of the divergent pipe section 25.
In some embodiments, as shown in fig. 1, the outer wall surface of the inlet pipe section 21 is provided with a first annular groove, the outer wall surface of the divergent pipe section 25 is provided with a second annular groove, and the natural gas loading apparatus further includes a first sealing ring 211 fitted in the first annular groove and a second sealing ring 251 fitted in the second annular groove.
The first sealing ring 211 ensures the sealing effect between the inlet pipe section 21 and the main pipe 11, avoiding the natural gas from flowing into the intermediate chamber 4. The second sealing ring 251 ensures the sealing effect between the divergent pipe section 25 and the main pipe 11, and prevents hydrogen from directly flowing into the mixing pipe from the intermediate chamber 4.
Specifically, at least a portion of the first sealing ring 211 is exposed outside the first annular groove, and the main pipe 11 is connected to the inlet pipe section 21 through the first sealing ring 211.
Specifically, at least a portion of the second seal 251 is exposed outside the second annular groove, and the main pipe 11 is connected to the divergent pipe section 25 through the second seal 251.
Specifically, the material of the first sealing ring 211 and the material of the second sealing ring 251 are both fluorine glue, which has excellent chemical resistance and is suitable for sealing the fuel gas containing hydrogen.
In some embodiments, as shown in fig. 2, the main pipe 11 includes a first flange portion 111 for connection to a natural gas pipe and a second flange portion 112 for connection to the mixing pipe 1.
The design of first flange portion 111 and second flange portion 112 makes trunk pipe 11 dismouting simple and convenient, and is easily changed, and simultaneously, connects firmly.
The hydrogen and the natural gas which are mixed in the venturi tube 2 form mixed gas, then the mixed gas flows into the mixing pipeline 1 through the second flange part 112, the total flow is obtained through a flowmeter in the mixing pipeline 1, the hydrogen and methane ratio of the mixed gas is obtained through a gas component detection device at the downstream of the natural gas hydrogen mixing device, whether the mixing ratio is accurate or not is judged according to the total flow, and if deviation exists, the valve opening degrees of the natural gas pipeline and the hydrogen pipeline at the upstream of the natural gas hydrogen mixing device can be continuously adjusted.
Specifically, a first O-ring 1111 is coaxially disposed on an end surface of the first flange portion 111, a second O-ring 1121 is coaxially disposed on an end surface of the second flange portion 112, the first O-ring 1111 is used for sealing a connection portion between the main pipe 11 and the natural gas pipe, and the second O-ring 1121 is used for sealing a connection portion between the main pipe 11 and the mixing pipe 1.
The first O-ring 1111 and the second O-ring 1121 are both made of fluorine glue.
The main pipeline 11 is connected with the natural gas pipeline through the first flange part 111 and is connected with the mixing pipeline 1 through the second flange part 112, so that more extrusion force transmitted from the natural gas pipeline and the mixing pipeline 1 is born by the main pipeline, the extrusion force on the Venturi tube 2 is reduced, the Venturi tube 2 is protected, and the service life of the Venturi tube 2 is prolonged.
In some embodiments, as shown in fig. 2, the branch pipe 12 includes a third flange 121 for connecting with the hydrogen pipe, so that the branch pipe is easy to disassemble and assemble and easy to replace, and the whole device can be recycled.
In addition, the first flange part 111, the second flange part 112 and the third flange part 121 form a split structure of the natural gas loading device.
Wherein, the first flange, the second flange and the third flange are designed according to the working pressure of 1.0 MPa.
Specifically, a third O-ring 1211 is coaxially disposed on an end surface of the third flange portion 121, and the third O-ring 1211 is used for sealing a connection between the branch pipe 12 and the hydrogen pipe.
The third O-ring 1211 is made of fluorine glue.
The branch pipes 12 are connected to the hydrogen pipe via the third flange portion 121, and the function thereof is similar to that of the main pipe 11 in the above embodiment, and the description thereof is omitted.
In some embodiments, the first flange portion 111, the second flange portion 112, and the third flange portion 121 each have a connection hole having a cross-sectional shape of a kidney or a bar.
Compared with conventional circular bolt holes, the connecting holes in the embodiment can enable the connecting bolts of the flanges to slide in the connecting holes along the length direction of the connecting bolts, the connecting holes are convenient to be in butt joint with the bolt holes in the flange plate of the original pipeline, the connecting holes provide certain moving space for the connecting bolts, and the problem that the connecting bolts cannot be fastened due to butt joint errors of the flange plate is solved.
In conclusion, the natural gas hydrogen-mixing device has the advantages of good mixing effect, compact structure, convenience in disassembly and assembly, low cost and the like.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly specified otherwise.
In the present invention, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being permanently connected, detachably connected, or integral; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be interconnected within two elements or in a relationship where two elements interact with each other unless otherwise specifically limited. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although the above embodiments have been shown and described, it should be understood that they are exemplary and should not be construed as limiting the present invention, and that many changes, modifications, substitutions and alterations to the above embodiments may be made by those of ordinary skill in the art without departing from the scope of the present invention.
Claims (10)
1. A natural gas loading device, comprising:
the pipeline comprises a main pipeline and a branch pipeline which are communicated with each other;
the venturi tube is matched in the main pipeline and closes openings at two ends of the main pipeline, an intermediate cavity is formed between the outer surface of the venturi tube and the inner surface of the main pipeline, the intermediate cavity is communicated with the branch pipeline, an inlet communicated with the intermediate cavity and the inner cavity of the venturi tube is formed in the venturi tube, one of the inlet end of the venturi tube and the inlet end of the branch pipeline is communicated with the natural gas pipeline, and the other one of the inlet end of the venturi tube and the inlet end of the branch pipeline is communicated with the hydrogen pipeline; and
the rectifying plate is arranged at the outlet end of the Venturi tube, and a plurality of rectifying holes are formed in the rectifying plate.
2. The natural gas loading device according to claim 1, wherein the venturi tube comprises an inlet tube section, a contraction tube section, a throat tube, a ring plate and a gradual expansion tube section which are connected in sequence, the movable end of the inlet tube section seals one end opening of the main tube and forms the inlet end of the venturi tube, the movable end of the gradual expansion tube section seals two end openings of the main tube and forms the outlet end of the venturi tube, and the inlet is arranged on the ring plate.
3. A natural gas loading device according to claim 2, wherein the inlet comprises a plurality of through holes spaced circumferentially around the annular plate.
4. The natural gas loading device according to claim 1, wherein a plurality of the rectifying holes are uniformly distributed on the rectifying plate, and the cross-sectional shape of the rectifying holes is any one of circular, square, prismatic and hexagonal; or, the rectifying plate is of a grid structure, and a plurality of rectifying holes are formed around the grid structure.
5. A natural gas loading apparatus as claimed in claim 2, wherein there are a plurality of said rectifying plates, and a plurality of said rectifying plates are provided in said divergent section and arranged at intervals in the axial direction of said main pipe.
6. The natural gas loading device according to claim 2, wherein a longitudinal sectional line of a wall surface of each of the inlet pipe section, the contracted pipe section, the throat pipe section, and the divergent pipe section is a victorian curve.
7. The natural gas loading device according to claim 2, wherein the outer wall surface of the inlet pipe section is provided with a first annular groove, the outer wall surface of the divergent pipe section is provided with a second annular groove, and the natural gas loading device further comprises a first sealing ring fitted in the first annular groove and a second sealing ring fitted in the second annular groove.
8. The natural gas loading device according to claim 1, wherein the main pipe includes a first flange portion for connection with a natural gas pipe and a second flange portion for connection with a mixing pipe.
9. The natural gas loading device according to claim 8, wherein the branch pipe includes a third flange portion for connection with the hydrogen gas pipe.
10. The natural gas loading device according to claim 9, wherein the first flange portion, the second flange portion and the third flange portion are provided with connecting holes, and the cross section of each connecting hole is kidney-shaped or long-strip-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210187794.1A CN114542977A (en) | 2022-02-28 | 2022-02-28 | Natural gas hydrogen-mixing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210187794.1A CN114542977A (en) | 2022-02-28 | 2022-02-28 | Natural gas hydrogen-mixing device |
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| CN114542977A true CN114542977A (en) | 2022-05-27 |
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| CN202210187794.1A Pending CN114542977A (en) | 2022-02-28 | 2022-02-28 | Natural gas hydrogen-mixing device |
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Cited By (1)
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Application publication date: 20220527 |