CN115013729B - Medium-high pressure gas conveying system and method adopting double-layer air flue composite material pipe - Google Patents
Medium-high pressure gas conveying system and method adopting double-layer air flue composite material pipe Download PDFInfo
- Publication number
- CN115013729B CN115013729B CN202210615014.9A CN202210615014A CN115013729B CN 115013729 B CN115013729 B CN 115013729B CN 202210615014 A CN202210615014 A CN 202210615014A CN 115013729 B CN115013729 B CN 115013729B
- Authority
- CN
- China
- Prior art keywords
- low
- pipeline
- pressure gas
- layer
- gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000002131 composite material Substances 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000007789 gas Substances 0.000 claims abstract description 232
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 41
- 239000001257 hydrogen Substances 0.000 claims abstract description 41
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 36
- 239000010410 layer Substances 0.000 claims description 153
- 239000000463 material Substances 0.000 claims description 23
- 230000008569 process Effects 0.000 claims description 14
- 239000000835 fiber Substances 0.000 claims description 10
- 239000002184 metal Substances 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 239000012466 permeate Substances 0.000 claims description 7
- 239000011241 protective layer Substances 0.000 claims description 7
- 230000004888 barrier function Effects 0.000 claims description 6
- 239000002861 polymer material Substances 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 239000000956 alloy Substances 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 4
- 238000007726 management method Methods 0.000 claims description 4
- 229920002748 Basalt fiber Polymers 0.000 claims description 3
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 3
- 239000004917 carbon fiber Substances 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 239000003365 glass fiber Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 229920006231 aramid fiber Polymers 0.000 claims description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 2
- 229920000728 polyester Polymers 0.000 claims description 2
- 150000002431 hydrogen Chemical class 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 229910052755 nonmetal Inorganic materials 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229920001903 high density polyethylene Polymers 0.000 description 2
- 239000004700 high-density polyethylene Substances 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 239000004800 polyvinyl chloride Substances 0.000 description 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 2
- 239000012783 reinforcing fiber Substances 0.000 description 2
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000003487 anti-permeability effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- 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
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/14—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups
-
- 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
- F17D1/065—Arrangements for producing propulsion of gases or vapours
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/34—Hydrogen distribution
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Abstract
The invention discloses a middle-high pressure gas conveying system adopting double-layer air flue composite material pipes, which comprises a main pipeline, a low-pressure accompanying pipeline, a low-pressure gas outlet pipeline and a gas reinjection pipeline, wherein the main pipeline is formed by continuously connecting a plurality of composite material pipes through connecting hardware fittings; the composite material pipe comprises a multilayer pipe body, the pipe body at least comprises an outer structural layer and an inner structural layer, and a low-pressure air guide layer is arranged between the outer structural layer and the inner structural layer; the low-pressure gas leading-out pipeline and the gas reinjection pipeline are arranged between the low-pressure accompanying pipeline and the main pipeline; the low-pressure gas guiding pipeline, the gas reinjection pipeline and the low-pressure accompanying pipeline form a low-pressure gas loop. The invention solves the gas permeation problem in long-distance pipeline transportation of medium and high pressure gas through the product characteristics and active management in system operation, thereby thoroughly overcoming the gas leakage problem in long-distance transportation of medium and high pressure gas in hydrogen. The invention also discloses a medium-high pressure gas conveying method adopting the double-layer air flue composite material pipe.
Description
Technical Field
The invention relates to middle and high pressure gas conveying equipment, in particular to a middle and high pressure gas conveying system adopting a double-layer air flue composite material pipe. The invention also relates to a medium-high pressure gas conveying method adopting the double-layer air flue composite material pipe.
Background
Hydrogen is the cleanest energy source and is a future hope for humans. The proposal of the double-carbon (namely short for carbon peak reaching and carbon neutralization) target more quickly researches the hydrogen energy technology and develops the hydrogen energy industry. The hydrogen energy industry chain is actively developing the front-end hydrogen production technology and the back-end hydrogen consumption technology. However, the transportation of hydrogen is always a bottleneck restricting the development of the hydrogen industry.
The transportation of hydrogen is mainly carried out in the following ways: container check, long-tube trailer structure, liquid hydrogen tank car and pipeline transport. The first three transportation modes are not high in transportation efficiency, but are the mainstream transportation modes at present, and the market ratio of the promising pipeline hydrogen transportation mode is small. Without reliable and low-cost pipeline hydrogen transportation conditions, the hydrogen energy source is almost impossible to popularize and apply on a large scale.
The pipeline hydrogen transportation technology has not been developed rapidly, and the main reason is that the hydrogen embrittlement phenomenon of metal pipelines is difficult to overcome. The seamless steel tube body for conveying hydrogen and the welding seam at the joint of the seamless steel tube body are easy to have embrittlement (namely hydrogen embrittlement) and leakage, especially under high-pressure environment. Thus, the long-term safety effectiveness of hydrogen piping, and particularly of piping equipment, is a significant technical challenge. The industry has been trying to solve the problem of high pressure pipeline transportation of hydrogen by changing the material of the transportation pipeline, and the main solution is to use polymer material as the pipeline material for transporting high pressure hydrogen. The polymer material does not have the phenomenon of hydrogen embrittlement, but has obvious defects. Compared with metal materials, high polymer materials (such as plastics) have better permeability on molecular layers, and hydrogen molecules can permeate into a material body of the pipe body under the action of certain pressure and gradually permeate into an outer low-pressure area of the pipe body, so that the permeated hydrogen can be gradually accumulated in a pipe ditch for accommodating the pipe body on the way of conveying high-pressure hydrogen by the high polymer material pipe body, and explosion combustion is easily caused. Therefore, the plastic pipe is adopted to convey high-pressure hydrogen, and great potential safety hazards exist. In addition, in order to realize long-distance hydrogen transmission of the existing plastic pipe, a section of composite plastic short pipe needs to be connected, and a joint hardware tool still needs to use a metal material, so that the hydrogen embrittlement phenomenon is difficult to avoid. As long as there are several weak links in the whole pipeline, the long pipe high pressure delivery will fail.
Disclosure of Invention
The invention aims to provide a medium-high pressure gas conveying system adopting a double-layer air flue composite material pipe, which can thoroughly solve the problems of gas leakage and gas escape generated in the process of conveying medium-high pressure gas by a non-metal pipe.
In order to solve the technical problems, the invention adopts a technical scheme of a middle-high pressure gas conveying system of a double-layer air flue composite material pipe, which comprises the following steps:
the device comprises a main pipeline 11, a low-pressure gas leading-out pipeline 15, a gas reinjection pipeline 16 and a booster pump 14, wherein the main pipeline 11 is formed by splicing N composite material pipes through a connecting hardware fitting 12; the composite material tube comprises a multilayered tube body formed with a hollow main channel 10; the pipe body at least comprises an outer structural layer 2 and an inner structural layer 4, and a low-pressure air guide layer 3 is arranged between the outer structural layer 2 and the inner structural layer 4; the low-pressure gas guide layer 3 forms a low-pressure gas channel; the inlet of the low-pressure gas leading-out pipeline 15 is communicated with the low-pressure gas leading layer 3 of the main pipeline 11; the outlet of the gas reinjection pipeline 16 is communicated with the main channel 10 of the main pipeline 11; the inlet of the booster pump 14 is connected with the outlet of the low-pressure gas outlet pipeline 15, and the outlet of the booster pump 14 is connected with the inlet of the gas reinjection pipeline 16; the low-pressure gas outlet pipeline 15, the gas reinjection pipeline 16 and the booster pump 14 form a low-pressure gas loop.
In another embodiment, the device further comprises a low-pressure accompanying pipeline 13, wherein the low-pressure accompanying pipeline 13 is arranged on one side of the main pipeline 11; one end of the low-pressure accompanying pipeline 13 is connected with an outlet of a low-pressure gas outlet pipeline 15, and the other end of the low-pressure accompanying pipeline 13 is connected with an inlet of the booster pump 14.
In another embodiment, the main conduit 11 is a plurality of; the main pipelines 11 share the same low-pressure accompanying pipeline 13.
In another embodiment, the length of the low pressure accompanying conduit 13 is less than the length of the main conduit 11; the number of the low-pressure gas loops is multiple; the plurality of low-pressure gas loops are distributed along the length direction of the main pipe 11; the plurality of low-pressure gas circuits have the gas return line 16 alone or share the same gas return line 16.
In another embodiment, the tube body comprises an outer protection layer 1, an outer structural layer 2, a low pressure gas guiding layer 3, an inner structural layer 4, a barrier layer 5 and an inner protection layer 6 in sequence from outside to inside.
In another embodiment, the material of the outer structural layer 2 and/or the inner structural layer 4 is compounded by a high polymer material and fibers; the fiber is one or more of polyester fiber, aramid fiber, glass fiber, carbon fiber or basalt fiber;
in another embodiment, the low-pressure gas-guiding layer 3 is a hollow layer, a support material is arranged in the hollow layer, and the low-pressure gas-guiding layer 3 realizes the fixed connection between the outer structural layer 2 and the inner structural layer 4 through the support material; the support material of the low-pressure air-guiding layer 3 is reinforced fiber bundles, glass fiber reinforced plastic bands or metal strips soaked by resin.
In another embodiment, the connection hardware 12 is made of hydrogen embrittlement resistant alloy material.
In another embodiment, the inlet of the low-pressure gas outlet pipe 15 and the outlet of the gas return pipe 16 are communicated with the main pipe 11 through the connection fitting 12 of the main pipe 11.
In another embodiment, a plurality of data communication cables extending along the length direction of the pipe body are laid outside the outer structural layer 2;
in another embodiment, a plurality of pressure sensors 21 are arranged outside the outer structural layer 2 at intervals along the length direction of the pipe body.
The invention also provides a medium-high pressure gas conveying method adopting the double-layer air flue composite material pipe, and the technical scheme is that the method comprises the following steps:
inputting medium-high pressure gas into a main channel 10 of a main pipeline 11, and in the process that the medium-high pressure gas is conveyed forwards along the main pipeline 11, a small amount of hydrogen molecules in the medium-high pressure gas permeate outwards beyond the material of the inner structural layer 4 and enter the low-pressure gas guide layer 3 to form low-pressure permeating gas; the low-pressure permeating gas entering the low-pressure gas guiding layer 3 flows to one end or two ends of the main pipeline 11 along the axial direction in a low-pressure gas channel of the low-pressure gas guiding layer 3; the low-pressure permeating gas flows into the booster pump 14 through the low-pressure gas leading-out pipeline 15, the booster pump 14 boosts the low-pressure permeating gas and then inputs the low-pressure permeating gas into the gas reinjection pipeline 16, and the permeating gas finally flows back to the main channel 10 of the main pipeline 11 and is conveyed forwards together with the medium-high pressure gas, so that the long-distance conveying of the active management type medium-high pressure gas is realized.
The invention can achieve the technical effects that:
the low-pressure air guide layer is arranged between the outer structural layer and the inner structural layer, the outer structural layer and the inner structural layer are fixedly connected into a whole through the supporting material of the low-pressure air guide layer, and a gap as large as possible can be reserved in the pipe wall structure of the main pipeline, so that an annular space which can be communicated with each other and axially moves can be formed.
Because the gas permeability is related to the pressure and the anti-permeability of the material, the invention utilizes the double-layer air passage of the main pipeline, wherein the low-pressure gas guide layer of the main pipeline is used as an annular hollow interlayer for bearing high-pressure permeating gas, the permeating gas with the permeating pressure is gathered in the low-pressure gas guide layer, and the permeating gas mainly flows forwards or backwards along the axial direction in the low-pressure gas guide layer under the constraint of the outer structure layer and the outer protection layer, so that the continuous permeating amount to the outer structure can be strictly limited within a certain range; because the connecting hardware fittings are distributed on the main pipeline at intervals, the permeated gas is inevitably led out of the pipeline by the low-pressure gas in the process of flowing in the low-pressure gas guide layer, thereby realizing the collection of the exosmotic gas; the collected permeating gas returns to the main channel through a low-pressure gas loop formed by the booster pump, so that the problem of leakage of high-pressure gas in non-metal pipeline conveying can be fundamentally solved.
The invention solves the gas permeation problem of the medium and high pressure gas in long-distance pipeline transmission by the product characteristics and the active management in the system operation through the low pressure gas guiding layer arranged in the pipe body and the low pressure gas loop formed by the gas booster pump or the low pressure accompanying pipeline arranged outside the pipe body, thereby thoroughly overcoming the gas leakage problem of the medium and high pressure long transmission of the hydrogen. The invention can be used for long-distance pipe transportation of hydrogen and also can be used for medium-high pressure transportation of other gases such as oxygen.
Drawings
It is to be understood by those skilled in the art that the following description is only exemplary of the principles of the present invention, which may be applied in numerous ways to achieve many different alternative embodiments. These descriptions are made for the purpose of illustrating the general principles of the present teachings and are not meant to limit the inventive concepts disclosed herein.
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the general description given above and the detailed description of the drawings given below, serve to explain the principles of the invention.
The invention is described in further detail below with reference to the following figures and detailed description:
FIG. 1 is a schematic diagram of a medium to high pressure gas delivery system of the present invention utilizing a double layer airway composite tube;
FIG. 2 is a schematic cross-sectional view of a composite tube of the present invention having a double layer air channel;
FIG. 3 is a schematic view of another embodiment of a medium to high pressure gas delivery system of the present invention;
fig. 4 is a schematic view of a third embodiment of the medium to high pressure gas delivery system of the present invention.
The reference numbers in the figures illustrate:
1 is an outer protective layer, 2 is an outer structural layer,
3 is a low-pressure air-conducting layer, 4 is an inner structural layer,
5 is a barrier layer, 6 is an inner protective layer,
a main pipe 11, a connecting hardware fitting 12,
13 is a low-pressure accompanying pipeline, 14 is a booster pump,
15 is a low-pressure gas outlet pipeline, 16 is a gas reinjection pipeline,
10 is the main channel and 21 is the pressure sensor.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the invention. Unless defined otherwise, technical or scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. As used herein, the terms "first," "second," and the like, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" and similar words are intended to mean that the elements or items listed before the word cover the elements or items listed after the word and their equivalents, without excluding other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
As shown in fig. 1, the medium-high pressure gas delivery system adopting the double-layer airway composite pipe comprises a main pipeline 11, wherein a low-pressure accompanying pipeline 13 is arranged on one side of the main pipeline 11, and the low-pressure accompanying pipeline 13 is laid at a distance from the main pipeline 11;
the main pipeline 11 is formed by splicing a plurality of composite material pipes through a connecting hardware fitting 12; as shown in fig. 2, the composite material pipe comprises a multilayered pipe body formed with a hollow main passage 10, the main passage 10 being for the passage of a medium-high pressure gas; the pipe body is sequentially provided with an outer protection layer 1, an outer structural layer 2, a low-pressure air guide layer 3, an inner structural layer 4, a barrier layer 5 and an inner protection layer 6 from outside to inside;
the low-pressure gas guide layer 3 is a hollow layer, and an annular space formed by the hollow layer is used as a low-pressure gas channel for the low-pressure permeation gas to pass through;
the hollow layer is internally provided with a support material, and the low-pressure air guide layer 3 is fixedly connected between the outer structure layer 2 and the inner structure layer 4 through the support material;
the support material of the low-pressure air-guiding layer 3 is reinforced fiber bundles soaked by resin, glass steel bands or metal strips. The reinforcing fibers may be one or more of glass fibers, carbon fibers, or basalt fibers. The reinforced fiber bundle can improve the bearing capacity of the pipe body.
The barrier layer 5 can slow down the permeation degree of medium-high pressure gas;
preferably, the material of the outer structure layer 2 and/or the inner structure layer 4 is a high molecular material, such as thermoplastic resin PVC (polyvinyl chloride), HDPE (high density polyethylene) or PA12 (nylon);
preferably, the link hardware 12 is made of nickel alloy (such as "Meng Naier alloy") or other alloy material resistant to hydrogen embrittlement to improve the hydrogen resistance of the joint material.
A low-pressure gas leading-out pipeline 15 and a gas reinjection pipeline 16 are arranged between the low-pressure accompanying pipeline 13 and the main pipeline 11; the inlet of the low-pressure gas leading-out pipeline 15 is communicated with the low-pressure gas leading-out layer 3 of the main pipeline 11, and the outlet of the low-pressure gas leading-out pipeline 15 is communicated with the inner cavity of the low-pressure accompanying pipeline 13; the inlet of the gas reinjection pipeline 16 is communicated with the inner cavity of the low-pressure accompanying pipeline 13, and the outlet of the gas reinjection pipeline 16 is communicated with the main channel 10 of the main pipeline 11;
the low-pressure gas guiding-out pipeline 15 is used for communicating the low-pressure gas guiding layer 3 of the main pipeline 11 with the low-pressure accompanying pipeline 13, and the gas reinjection pipeline 16 is used for communicating the low-pressure accompanying pipeline 13 with the main channel 10 of the main pipeline 11, so that a low-pressure gas loop is formed;
the inlet of the low-pressure gas leading-out pipeline 15 and the outlet of the gas reinjection pipeline 16 are communicated with the main pipeline 11 through a connecting fitting 12 of the main pipeline 11;
preferably, a plurality of low-pressure gas circuits may be provided between the low-pressure accompanying pipe 13 and the main pipe 11; the plurality of low-pressure gas loops are distributed along the length direction of the main pipe 11; multiple low pressure gas circuits may share the same gas return line 16;
preferably, the low-pressure gas outlet pipeline 15 and the gas return pipeline 16 are respectively provided with a one-way valve;
preferably, a booster pump 14 is provided at the inlet of the gas reinjection conduit 16;
preferably, in order to avoid the pressure loss phenomenon of the medium-high pressure gas in the long-distance conveying process, a pressurizing station is required to be arranged on the main pipeline 11 at a certain distance in order to maintain the pressure of the medium-high pressure gas in the long-distance pipe conveying process; the booster pumps 14 for collecting the low pressure permeate gas may be provided separately or may share a booster station.
Preferably, a plurality of data communication cables extending along the length direction of the pipe body are laid outside the outer structure layer 2; the data communication cable may be disposed between the outer structural layer 2 and the outer protective layer 1, or disposed within the outer protective layer 1.
A plurality of pressure sensors 21 are arranged in the outer structure layer 2, and the plurality of pressure sensors 21 are distributed along the length direction of the main pipeline 11; the pressure sensor 21 is used to monitor the pressure in the low pressure gas guiding layer 3.
Preferably, the length of the low-pressure accompanying duct 13 is less than the length of the main duct 11; a plurality of low pressure accompanying pipes 13 may be provided at intervals along a length direction thereof at one side of the main pipe 11 so that the main pipe 11 has a plurality of low pressure gas circuits.
The support material of the low-pressure air-guiding layer 3 of the present invention is a resin-impregnated reinforcing fiber bundle, a glass steel belt or a metal strip.
Preferably, the low pressure gas guiding layer 3 may be provided with metal strips at intervals along the length direction of the pipe body so as to support the annular space.
The invention discloses a middle-high pressure gas conveying method adopting a double-layer air flue composite material pipe, which comprises the following steps of:
inputting medium-high pressure gas (such as hydrogen) into a main channel 10 of a main pipeline 11, wherein a small amount of hydrogen molecules in the medium-high pressure gas permeate outwards beyond materials of an inner protective layer 6, a barrier layer 5 and an inner structural layer 4 and enter a low-pressure gas guide layer 3 to form low-pressure permeating gas in the process that the medium-high pressure gas is conveyed forwards along the main pipeline 11;
the low-pressure permeating gas entering the low-pressure gas guiding layer 3 flows to one end or two ends of the main pipeline 11 along the axial direction in a low-pressure gas channel of the low-pressure gas guiding layer 3;
in the process that the low-pressure permeation gas flows axially in the low-pressure gas guiding layer 3, when encountering the low-pressure gas guiding-out pipeline 15, the low-pressure permeation gas can enter the low-pressure gas guiding-out pipeline 15 and flow into the low-pressure accompanying pipeline 13 because the pressure in the low-pressure gas guiding-out pipeline 15 is low;
the low-pressure permeate gas is collected to the booster pump 14 in the process of flowing axially in the low-pressure accompanying pipeline 13, flows into the gas reinjection pipeline 16 through the boosting of the booster pump 14, finally flows back to the main channel 10 of the main pipeline 11, and is conveyed forwards together with the medium-high pressure gas.
The invention utilizes the double-layer air passage of the main pipeline 11, the low-pressure air guide layer 3 of the main pipeline 11 is used as an annular hollow interlayer for bearing high-pressure permeating gas, the permeating gas with permeating pressure is gathered in the low-pressure air guide layer 3, and the permeating gas flows forwards or backwards in the low-pressure air guide layer 3 along the axial direction under the constraint of the outer structure layer 2 and the outer protection layer 1; since the connecting fittings 12 are distributed on the main pipe 11 at intervals, the permeated gas inevitably encounters the low-pressure gas leading-out pipe 15 in the process of flowing in the low-pressure gas guiding layer 3, so that the collection of the externally permeated gas is realized;
the permeating gas returns to the main channel 10 through a low-pressure gas loop formed by the low-pressure accompanying pipeline 13, so that the flow loss and the potential safety hazard caused by the outward permeation of the middle-high pressure gas in the process of conveying the middle-high pressure gas along the main channel 10 can be reduced as much as possible.
Preferably, a pressure sensor is arranged outside the outer structure layer 2, and the pressure sensor can monitor the pressure in the low-pressure gas guide layer 3; the pressure sensor can be arranged between the outer structure layer 2 and the outer protection layer 1 or arranged in the outer protection layer 1;
if any one part of the main pipeline 11 leaks, gas can enter the low-pressure gas guide layer 3 from the leakage point, so that the local pressure of the low-pressure gas guide layer 3 is higher; or the local pressure of the low-pressure gas guide layer 3 is lower due to the breakage and leakage of any position of the outer protection layer 1; at the moment, the pressure sensor can monitor the leakage point so as to carry out repair operation in time. Obviously, the online instant monitoring function of the pressure sensor can provide the most important technical means for the integrity management of the oil and gas pipeline system.
In order to solve the technical problem of high-pressure gas in long-distance pipeline transportation, the composite material pipe is adopted to replace a metal pipe to serve as a transportation pipeline, so that the hydrogen embrittlement phenomenon is avoided. Meanwhile, in order to solve the problem of permeation caused by hydrogen molecules passing through the pipe wall in the process of conveying medium-high pressure gas by the non-metal pipe, the composite material pipe with the double-layer gas channel is adopted, the low-pressure gas guide layer 3 is formed between the outer structure layer 2 and the inner structure layer 4, the inner structure layer 4 enables the pipe body to bear high pressure, the low-pressure gas guide layer 3 arranged between the outer structure layer 2 and the inner structure layer 4 forms a gas channel and can bear the permeation of medium-high pressure gas, and the hydrogen molecules passing through the inner structure layer 4 can enter a low-pressure gas loop formed by the low-pressure gas guide layer 3 and a booster pump 14 or a low-pressure accompanying pipeline 13 after entering the low-pressure gas guide layer 3 and finally flow back to the main channel 10 of the main pipeline 11 to be conveyed forwards, so that the problem of leakage of the high-pressure gas in the process of conveying by the non-metal pipe is thoroughly solved.
As another embodiment of the present invention, as shown in fig. 3, a plurality of main pipes 11 may share the same low-pressure accompanying pipe 13.
As a third embodiment of the present invention, as shown in fig. 4, if the pressure of the medium-high pressure gas is low and the leakage amount of the gas during the transportation is small, the low pressure accompanying pipe 13 may be eliminated, so that the inlet of the low pressure gas leading pipe 15 is communicated with the low pressure gas leading layer 3 of the main pipe 11, and the outlet of the low pressure gas leading pipe 15 is communicated with the inlet of the booster pump 14; the inlet of the gas reinjection pipeline 16 is communicated with the outlet of the booster pump 14, and the outlet of the gas reinjection pipeline 16 is communicated with the main channel 10 of the main pipeline 11; the low-pressure gas outlet pipe 15, the gas return pipe 16 and the booster pump 14 form a low-pressure gas loop.
The third embodiment is characterized in that the leaked gas is collected by the low pressure gas guiding layer 3, pressurized by the pressurizing pump 14 and pumped back to the main channel 10 for further transportation. Especially for branch pipelines.
The medium-pressure gas in the present invention means a gas of 1.6 to 10MPa, and the high-pressure gas means a gas of 10MPa or more.
It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.
Claims (9)
1. A middle-high pressure gas conveying system adopting double-layer air flue composite material pipes is characterized by comprising a main pipeline (11), wherein the main pipeline (11) is formed by splicing N composite material pipes through a connecting hardware fitting (12); the composite material tube comprises a multilayered tube body formed with a hollow main channel (10); the pipe body at least comprises an outer structural layer (2) and an inner structural layer (4), and a low-pressure air guide layer (3) is arranged between the outer structural layer (2) and the inner structural layer (4); the low-pressure gas guide layer (3) forms a low-pressure gas channel;
the inlet of the low-pressure gas leading-out pipeline (15) is communicated with the low-pressure gas leading-out layer (3) of the main pipeline (11);
the outlet of the gas reinjection pipeline (16) is communicated with the main channel (10) of the main pipeline (11); and
an inlet of the booster pump (14) is connected with an outlet of the low-pressure gas outlet pipeline (15), and an outlet of the booster pump (14) is connected with an inlet of the gas reinjection pipeline (16);
the low-pressure gas outlet pipeline (15), the gas reinjection pipeline (16) and the booster pump (14) form a low-pressure gas loop;
the low-pressure accompanying pipeline (13) is arranged on one side of the main pipeline (11); one end of the low-pressure accompanying pipeline (13) is connected with an outlet of the low-pressure gas leading-out pipeline (15), and the other end of the low-pressure accompanying pipeline (13) is connected with an inlet of the booster pump (14).
2. The middle-high pressure gas delivery system adopting the double-layer air flue composite material pipe according to claim 1, wherein the main pipe (11) is provided with a plurality of strips; the plurality of main pipelines (11) share the same low-pressure accompanying pipeline (13).
3. The middle and high pressure gas delivery system with double layer airway composite tube according to claim 1 is characterized in that the length of the low pressure accompanying tube (13) is less than the length of the main tube (11); the number of the low-pressure gas loops is multiple; the plurality of low-pressure gas loops are distributed along the length direction of the main pipeline (11); the plurality of low-pressure gas circuits have gas return lines (16) individually or share the same gas return line (16).
4. The middle-high pressure gas conveying system adopting the double-layer air flue composite material pipe as claimed in claim 1, wherein the pipe body is sequentially provided with an outer protective layer (1), an outer structural layer (2), a low-pressure gas conducting layer (3), an inner structural layer (4), a barrier layer (5) and an inner protective layer (6) from outside to inside.
5. The middle-high pressure gas delivery system adopting the double-layer air flue composite material pipe is characterized in that the material of the outer structural layer (2) and/or the inner structural layer (4) is compounded by high polymer material and fiber; the fiber is one or more of polyester fiber, aramid fiber, glass fiber, carbon fiber or basalt fiber;
and/or the low-pressure air guide layer (3) is a hollow layer, a support material is arranged in the hollow layer, and the low-pressure air guide layer (3) is fixedly connected between the outer structural layer (2) and the inner structural layer (4) through the support material; the support material of the low-pressure air guide layer (3) is reinforced fiber bundles soaked by resin, glass steel bands or metal strips.
6. The medium-high pressure gas conveying system adopting the double-layer air flue composite pipe as claimed in claim 1, characterized in that the connecting hardware (12) is made of a hydrogen embrittlement resistant alloy material.
7. The middle-high pressure gas conveying system adopting the double-layer air flue composite pipe as claimed in claim 1 or 6, wherein the inlet of the low-pressure gas leading-out pipeline (15) and the outlet of the gas reinjection pipeline (16) are communicated with the main pipeline (11) through a connecting hardware fitting (12) of the main pipeline (11).
8. The middle-high pressure gas conveying system adopting the double-layer air flue composite material pipe is characterized in that a plurality of data communication cables extending along the length direction of the pipe body are paved outside the outer structure layer (2);
and/or a plurality of pressure sensors (21) are arranged outside the outer structural layer (2) at intervals along the length direction of the pipe body.
9. The middle-high pressure gas conveying method adopting the double-layer air flue composite material pipe is characterized by comprising the following steps of:
inputting medium-high pressure gas into a main channel (10) of a main pipeline (11), and in the process that the medium-high pressure gas is conveyed forwards along the main pipeline (11), a small amount of hydrogen molecules in the medium-high pressure gas permeate outwards across the material of the inner structural layer (4) and enter the low-pressure gas guide layer (3) to form low-pressure permeating gas;
the low-pressure permeating gas entering the low-pressure gas guiding layer (3) flows to one end or two ends of the main pipeline (11) along the axial direction in a low-pressure gas channel of the low-pressure gas guiding layer (3);
in the process that low-pressure permeation gas flows in the low-pressure gas guiding layer (3) along the axial direction, when meeting the low-pressure gas guiding pipeline (15), the low-pressure permeation gas enters the low-pressure gas guiding pipeline (15) and flows into the low-pressure accompanying pipeline (13);
the low-pressure permeating gas flows into the booster pump (14) through the low-pressure gas guiding pipeline (15), the booster pump (14) boosts the low-pressure permeating gas and then inputs the low-pressure permeating gas into the gas reinjection pipeline (16), and the permeating gas finally flows back to the main channel (10) of the main pipeline (11) and is conveyed forwards together with the medium-high pressure gas, so that the active management type long-distance conveying of the medium-high pressure gas is realized.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210615014.9A CN115013729B (en) | 2022-06-01 | 2022-06-01 | Medium-high pressure gas conveying system and method adopting double-layer air flue composite material pipe |
| PCT/CN2022/097272 WO2023231053A1 (en) | 2022-06-01 | 2022-06-07 | Medium- and high-pressure gas transportation system and method using composite material pipes having double gas channels |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210615014.9A CN115013729B (en) | 2022-06-01 | 2022-06-01 | Medium-high pressure gas conveying system and method adopting double-layer air flue composite material pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115013729A CN115013729A (en) | 2022-09-06 |
| CN115013729B true CN115013729B (en) | 2023-03-21 |
Family
ID=83071899
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210615014.9A Active CN115013729B (en) | 2022-06-01 | 2022-06-01 | Medium-high pressure gas conveying system and method adopting double-layer air flue composite material pipe |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN115013729B (en) |
| WO (1) | WO2023231053A1 (en) |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1475891B1 (en) * | 1965-08-06 | 1971-02-04 | Gerard F Wittgenstein | Arrangement for locating cracks or similar leaks in a pipeline for hydrocarbons |
| JPH07127762A (en) * | 1993-11-05 | 1995-05-16 | Ogata Kanagata Seisakusho:Kk | Piping method for underground double tube and its outer shell structure |
| US20080121643A1 (en) * | 2006-09-11 | 2008-05-29 | Hydrogen Discoveries, Inc. | Mitigating Hydrogen Flux Through Solid and Liquid Barrier Materials |
| US9205373B2 (en) * | 2010-11-29 | 2015-12-08 | Quantum Fuel Systems Trechnologies Worldwide, Inc. | Breather layer for exhausting permeate from pressure vessels |
| CN102200219A (en) * | 2011-04-15 | 2011-09-28 | 中国石油大学(北京) | Method for supercharging and refilling after sampling of particulate matter in gas pipeline and device |
| CN102797974A (en) * | 2012-07-31 | 2012-11-28 | 张立永 | Hydrogen maser |
| WO2018000091A1 (en) * | 2016-06-27 | 2018-01-04 | Shawcor Ltd. | Polymeric pipe with axial venting elements |
| CN107781545A (en) * | 2016-08-30 | 2018-03-09 | 安徽万安环境科技股份有限公司 | A kind of interlayer plastic conduit with high leakproofness |
| CN110360388A (en) * | 2019-07-15 | 2019-10-22 | 广州天河胶管制品有限公司 | A kind of environment friendly fuel hose and production method |
| CN110454139A (en) * | 2019-09-16 | 2019-11-15 | 上海飞舟博源石油装备股份有限公司 | Gas-liquid two-phase shunts oil extraction system |
| CN110805832B (en) * | 2019-11-22 | 2021-03-16 | 绵阳科大久创科技有限公司 | High-pressure hydrogen storage and pipeline transportation safety system |
| CN114383056A (en) * | 2022-01-12 | 2022-04-22 | 中海石油气电集团有限责任公司 | Pipeline system and method for long-distance transportation of liquefied natural gas |
| CN114484098B (en) * | 2022-01-24 | 2023-07-14 | 临海伟星新型建材有限公司 | Hydrogen and natural gas mixed energy transmission pipeline and preparation method thereof |
| CN114413186B (en) * | 2022-03-29 | 2022-10-25 | 浙江大学 | Composite pipeline for hydrogen transportation and hydrogen leakage monitoring method |
-
2022
- 2022-06-01 CN CN202210615014.9A patent/CN115013729B/en active Active
- 2022-06-07 WO PCT/CN2022/097272 patent/WO2023231053A1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CN115013729A (en) | 2022-09-06 |
| WO2023231053A1 (en) | 2023-12-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104334950B (en) | The method of annular multi-layer piping, the machine component of manufacturing pipeline and formation pipeline | |
| US6032699A (en) | Fluid delivery pipe with leak detection | |
| US8839822B2 (en) | Dual containment systems, methods and kits | |
| CN1847717B (en) | Line system for fluids having volatile components | |
| EP3721125A1 (en) | High-pressure pipe with pultruded elements and method for producing the same | |
| CN104520629A (en) | Lining of pipelines to offshore installations | |
| US10890276B2 (en) | Metal strip winding continuous reinforced thermoplastic composite pipe | |
| US11892123B2 (en) | Strategies for safe fast-fill of compressed gas tanks | |
| JP2015092112A (en) | Hose assembly for transferring cryogenic fluid and composite hose | |
| CN205383359U (en) | A metal hose that is used for non - excavation of old pipeline to change | |
| US9322495B2 (en) | Connection for a thermoplastic pipe, assembly and method | |
| CN104141838A (en) | Flexible composite high-pressure delivery pipe | |
| CN115013729B (en) | Medium-high pressure gas conveying system and method adopting double-layer air flue composite material pipe | |
| US20140305535A1 (en) | Reinforced Liners for Pipelines | |
| CN107956934A (en) | A kind of steel strip winding continuously strengthens non-adherent flexible composite pipe | |
| CN207584207U (en) | A kind of steel strip winding continuously enhances non-adherent flexible composite pipe | |
| CN106917922A (en) | A kind of flexible compound internal lining pipe and its production technology | |
| US20130092316A1 (en) | Reinforced Liners For Pipelines | |
| CN105299333A (en) | Multilayer pipe | |
| CN113400696B (en) | Method for connecting large-caliber high-pressure fiber reinforced flexible composite pipe | |
| CN114382957B (en) | LNG low-temperature hose body forming method | |
| CN219082482U (en) | High-pressure-resistant and low-temperature-resistant pipeline | |
| CN218935552U (en) | Steel fiber and glass fiber reinforced polyethylene composite pipe for coal mine | |
| CN220082364U (en) | Composite hose capable of conveying low-temperature liquid | |
| CN216976190U (en) | Flexible joint of large-caliber high-pressure fiber reinforced flexible composite pipe |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: Room 401, Building 2 and Room 102, Building 4, No. 1618 Xinyang Road, Fengxian District, Shanghai, 2014 Patentee after: Shanghai Feizhou Boyuan Material Technology Co.,Ltd. Address before: 201413 Room 401, building 2, 1618 Xinyang Road, Fengxian District, Shanghai Patentee before: Shanghai Feizhou Boyuan Petroleum Equipment Co.,Ltd. |
|
| CP03 | Change of name, title or address |