CN114636529A - Multifunctional hydrogen conveying pipeline test system - Google Patents
Multifunctional hydrogen conveying pipeline test system Download PDFInfo
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2807—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes
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- G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
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Abstract
The invention discloses a multifunctional hydrogen conveying pipeline test system. The multifunctional hydrogen conveying pipeline test system comprises a gas source, a gas metering detection unit, a combustion and explosion characteristic test unit, a pipeline hydrogen adaptability test unit, a hydraulic characteristic monitoring unit, a pipeline connecting system and a master control room. Compared with the prior art, the test system established by the invention can perform the following processes under a circulation path: the method comprises the steps of gas mixing, separating, metering and precision testing in a pure hydrogen/hydrogen-doped pipeline, combustion and explosion characteristic testing, hydrogen adaptability testing of in-service/newly-built pipelines and parts under different temperature, pressure and load conditions, defect and leakage detection of the pipelines and the parts thereof, hydraulic characteristic monitoring of a pipeline system and full-line data acquisition and management.
Description
Technical Field
The invention relates to the technical field of pipeline tests, in particular to a multifunctional hydrogen conveying pipeline test system.
Background
The hydrogen energy has the characteristics of rich sources, greenness, low carbon, wide application and the like, and the national fourteen-five planning clearly puts forward that the development of the hydrogen energy industry is an important way for improving the energy safety, promoting the energy revolution, leading the transformation and the upgrade of the industry and realizing the green development. The safe and economic transportation is one of the key links of hydrogen energy development, and the current main modes of hydrogen energy transportation include high-pressure hydrogen cylinder long tube trailer transportation, liquid hydrogen tank truck transportation and liquid hydrogen barge transportation, which have higher transportation cost and lower efficiency. Because natural gas pipe networks in China are widely distributed and large in construction scale, the method for transporting hydrogen by using in-service natural gas pipelines or newly-built pipelines is the best way for large-scale economic transportation and utilization of hydrogen energy in the future.
At present, natural gas pipeline transmission technology in China is mature, and a natural gas transmission chain consisting of modules such as line engineering, a process station, an automatic control system, a communication system, a power supply and distribution system, pipeline corrosion prevention and gas storage is formed. However, hydrogen has physical and chemical properties such as easy leakage, flammability and explosiveness, the pressure range of pipelines is wide, the variety of pipeline materials is various, and hydrogen is transported through in-service natural gas pipelines or newly-built pipelines to generate a series of new technical and safety problems. At present, the influence of the simulated hydrogen-loaded natural gas on materials is researched in Japan, America, Korea and the like, but if the actual influence of pure hydrogen/hydrogen loading on pipelines, parts and systems is to be proved, systematic tests should be carried out in a real circulating pure hydrogen/hydrogen loading environment, and related testing devices and methods are still lacked in China.
At present, the pure hydrogen/hydrogen-doped pipeline transportation application mainly faces the following problems:
(1) the hydrogen molecules are small, the diffusion is fast, and when the hydrogen is transported by using in-service or newly-built pipelines, pipes, parts, equipment and the like face larger hydrogen leakage/seepage risks;
(2) the hydrogen ignition energy is low, the fuel is flammable and explosive, and leaked hydrogen accumulates in a limited space to cause great potential safety hazard, so that the safety of surrounding life and property is seriously damaged in case of open fire;
(3) the compatibility problem exists between the in-service or newly-built hydrogen transmission pipeline, parts and related equipment thereof and the hydrogen/hydrogen-doped natural gas, and the hydrogen doping can lead the pipe, the parts or the equipment (such as a compressor, mixing equipment, separating equipment, metering equipment and the like) to fail prematurely, thereby causing serious safety accidents;
(4) the pipeline pressure range is wide, the temperature and load environment are variable, the service condition is complex, and great challenges are provided for the prediction regulation of the hydrogen-doped pipeline.
At present, representative achievements in domestic related fields are as follows: 202110654808.1 'an experiment system and method for medium and low pressure hydrogen-containing pipeline', invention patent 202011477933.1 'a hydrogen-doped natural gas transportation and separation system and control method thereof', invention patent 202011634936.1 'a pure hydrogen transportation and distribution pipeline network system and control method thereof', and the like. The systems and the methods only design the procedures of blending, conveying, distributing, separating and purifying technologies in the process of conveying the hydrogen-doped/pure hydrogen pipelines, and do not specifically consider and design the characteristics of hydrogen, the influence of the hydrogen on the pipelines and the prevention of the hydrogen-induced failure consequence of the pipelines.
Therefore, in order to realize the large-scale safe application of the pure hydrogen/hydrogen-doped pipeline, the above-mentioned problems need to be solved urgently, and a multifunctional hydrogen conveying pipeline test system is established.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. To this end, an object of the present invention is to provide a multifunctional hydrogen transportation pipeline testing system, which includes: the system comprises a gas source, a gas metering detection unit, a combustion and explosion characteristic test unit, a pipeline hydrogen adaptability test unit, a hydraulic characteristic monitoring unit, a pipeline connecting system and a master control room;
the gas source comprises at least one or more of hydrogen gas, natural gas and hydrogen-loaded natural gas;
the gas metering detection unit comprises a flowmeter, a mixing device, a first buffer tank, a separation device and a mixing precision detection and separation purity detection instrument;
preferably, the blending device components include but are not limited to a flowmeter, a valve, a sealing element, a gas mixing pry, a gas component analyzer, a central control console and the like, the mixing process includes but is not limited to the utilization of a constant pressure proportioning system and an online mixing system, the front end of the blending device is connected with at least two input ports, one input port is connected with hydrogen, at least one second input port is connected with natural gas, the output port is connected with a first buffer tank, and the input port and the output port are both provided with flowmeters;
as a preferable embodiment, the separation method includes, but is not limited to, a cryogenic method, an air separation method, a pressure swing adsorption method, a membrane separation method, and the like;
the front end of the combustion and explosion characteristic testing unit is connected with a second buffer tank, and the gas flows out of the branch gas from the second buffer tank, passes through a pressure reducing valve for pressure change and flows to the combustion and explosion characteristic testing unit;
as a preferred scheme, after flowing into the combustion and explosion risk testing unit, the gas flows in multiple paths and enters a combustion and explosion testing device, and tests which can be carried out include but are not limited to a gas detonation test, a jet fire test, a pipeline explosion test and the like;
the pipeline adaptability test unit comprises a loading module, a detection and evaluation module, a third buffer tank and three sections of pipelines;
preferably, the gas flowing into the pipeline adaptability test unit flows in three paths through a valve:
furthermore, a first path of gas of the pipeline adaptability test unit flows into the loading module through a third buffer tank, and the path of gas is in a standing state;
furthermore, the second path of gas of the pipeline adaptability test unit flows into a pipeline with one end arranged under the air and the other end buried through a transverse pipe, so that the soil environment of the real pipeline can be simulated;
furthermore, the pipeline adaptability test unit is used for detecting the third path of gas flowing into the detection evaluation module, the hydrogen adaptability of the pipeline, parts and equipment is detected in the module by using a carrier gas bin test device and method, and various damage detection equipment is connected to the inner pipe wall;
the hydraulic characteristic monitoring unit monitors hydraulic characteristics of the whole pipeline test system, wherein the hydraulic characteristics comprise at least one or more of flow, gas transmission power, pipeline pressure drop and dynamic pressure;
the connecting pipeline system at least comprises a plurality of sections of pipelines and a plurality of valves, and runs through the whole cycle, and pipelines, valves, buffer tanks, compressors, pressure reducing valves and the like used by all units belong to the system;
preferably, the connecting pipeline system further comprises an in-service pipeline and a newly-built pipeline, wherein the in-service pipeline is an active natural gas pipeline or a pipeline produced according to the prior art standard, and the newly-built pipeline is a pipeline produced according to a standard different from the prior art.
As a preferred scheme, the pipe diameters of an in-service pipeline and a newly-built pipeline are in the range of 400-800 mm, the pressure range in the pipeline is 0-20 MPa, and the temperature test interval in the pipeline is-40-80 ℃;
the master control room is electrically connected with at least one or more of the gas metering detection unit, the combustion and explosion characteristic testing unit, the pipeline adaptability testing unit and the hydraulic characteristic monitoring unit and executes control.
Preferably, the system further comprises a carrier gas bin testing device, wherein the carrier gas bin testing device is used for being fastened outside the pipeline to be tested in the connecting pipeline system and detecting hydrogen leakage of the pipeline to be tested.
The device also comprises a pipeline loading device used for applying load to the pipeline to be tested.
According to one aspect of the invention, the test system cycling process comprises: gas source gas flows into the gas metering detection unit, flows into the first buffer tank through the plurality of flow meters and the mixing device, and flows into the second buffer tank under the action of the compressor; the gas in the second buffer tank is divided into two paths, one path flows to the combustion and explosion characteristic testing unit, and the other path flows to the pipeline hydrogen adaptability testing unit; and the gas in the pipeline hydrogen adaptability test unit is divided into three paths: the first path is introduced into the loading module through a third buffer tank, the second path is introduced into a pipeline with one end arranged under the air and one end buried, and the third path is introduced into the detection evaluation module; the gas flows into a fourth buffer tank after passing through a pipeline hydrogen adaptability test unit, the gas flows out of the fourth buffer tank and then flows into a gas metering detection unit in two paths, the first path participates in the circulation process, the second path enters a separation and purification device, and the separated gas can be selectively re-mixed into the pipeline after being detected to participate in the circulation process; the hydraulic characteristic monitoring unit is distributed throughout the whole circulation chain and monitors the hydraulic characteristic of the whole circulation process; the testing of all units can be done individually or multiple processes can be done simultaneously.
Compared with the prior related art, one or more technical solutions in the embodiment of the present invention have at least the following technical effects or advantages:
(1) the test device and the method established by the invention can carry out multifunctional tests under a circulation path, and comprise the following steps: mixing, separating, metering and testing the precision of gas in a pure hydrogen/hydrogen-doped pipeline, testing the combustion and explosion characteristics, testing the hydrogen adaptability of in-service/newly-built pipelines and parts under different temperatures, pressures and loads, detecting the quality and leakage of the pipelines and the parts thereof, monitoring the hydraulic characteristics of a pipeline system and acquiring and managing the data on line;
(2) the carrier gas bin testing device and the carrier gas bin testing method can be used for testing the hydrogen adaptability of the pipeline, parts of the pipeline and the like in situ, so that the disassembly and the damage of the pipeline are reduced, the testing process is simplified, the testing efficiency is improved, and the multifunctional performance, the safety and the reliability of the test are ensured;
(3) the device and the method for establishing the test can comprehensively perform pure hydrogen/hydrogen-doped pipeline experiments, can establish a set of complete experiment system and test method, and accelerate the development of pure hydrogen/hydrogen-doped pipeline transportation technology.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
FIG. 1 is a schematic diagram of an overall test system of the present invention;
description of the drawings:
the system comprises a first flowmeter 111, a second flowmeter 112, a third flowmeter 113, a first blending device 121, a second blending device 122, a first buffer tank 131, a second buffer tank 132, a third buffer tank 133, a fourth buffer tank 134, a compressor 14, a first valve 151, a second valve 152, a third valve 153, a fourth valve 154, a fifth valve 155, a sixth valve 156, a pressure reducing valve 16, an explosion experiment device 17, a first pressure gauge 181, a second pressure gauge 182, a third pressure gauge 183, a fourth pressure gauge 184 and a separation and purification device 19.
FIG. 2 is a schematic view of a carrier gas bin testing apparatus of the present invention; wherein fig. 2 (a) is a sectional view of the carrier gas silo testing device of the present invention, fig. 2 (b) is a side view of the carrier gas silo testing device of the present invention, fig. 2 (c) is a top view of the carrier gas silo testing device of the present invention, and fig. 2 (d) is a partially enlarged view of the sealing member in fig. 2 (c);
FIG. 3 is a schematic view of a duct-loaded carrier gas bin test system of the present invention; wherein, fig. 3 (a) is a cross-sectional view of the carrier gas bin test system loaded by the pipeline of the present invention, fig. 3 (b) is a side view of the carrier gas bin test device of the present invention, and fig. 3 (c) is a schematic diagram of the limit base of the carrier gas bin test system loaded by the pipeline of the present invention;
description of the drawings: the device comprises a double-end rubber flange ferrule 20, a pipeline to be tested 21, a valve 211, an instrument 212, a damage detector 213, a connecting piece 214, a gas detection device 22, a carrier gas bin 23, a refrigerant pipe 24, an inert gas storage unit 25, a refrigerant compressor unit 26, a sealing piece 27, a first sealing ring 271, a second sealing ring 272, a third sealing ring 273, a connecting elbow 31, a stop 311, a limit base 32, a fixing base 321, a baffle 322, a screw hole 323, a semi-cylindrical sealing cover 324, a connecting flange 33, a pipeline to be tested 34, a blocking flange 35, a load applying device 36 and a load applying port 361.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
The test platform and method of operation depicted in fig. 1-3 are preferred schematic diagrams of the system implementation, but the specific embodiments of the present invention may be implemented in other similar ways and are not limited to the frames and sequences shown in fig. 1-3. More precisely, the implementation flow given by the invention is a better way to fully understand the technical route of the invention in the technical field related to the invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the summary of the invention and the accompanying drawings is for the purpose of better describing the steps performed in the technical process of the invention and is not intended to be limited to the terminology so described.
The embodiments of the invention disclosed are, where appropriate, combinable with each other.
FIG. 1 is a schematic diagram of an overall testing system of the present invention. As shown in fig. 1, an embodiment of the present invention provides a multifunctional hydrogen transportation pipeline testing system, including: the system comprises a gas source, a gas metering detection unit, a combustion and explosion characteristic test unit, a pipeline hydrogen adaptability test unit, a hydraulic characteristic monitoring unit, a pipeline connecting system and a master control room.
The gas source comprises at least one or more of hydrogen gas, natural gas, and hydrogen-loaded natural gas. As a preferred scheme, the hydrogen source comprises hydrogen production by fossil fuel, industrial by-product hydrogen production, biomass hydrogen production, renewable energy hydrogen production (wind power, hydropower or solar energy system) and the like, and the purity of the hydrogen is more than 99%. As a preferable scheme, the natural gas source comprises coal-made synthetic natural gas, southwest oil and gas field natural gas, northwest oil and gas field natural gas, Zhongya natural gas, Zhongrussian natural gas, Zhongmai natural gas, offshore natural gas and the like, and the components meet the regulation of GB/T37124-2018 gas quality requirement for entering natural gas long-distance pipeline. By controlling the gas source, different gas component combinations can be generated so as to carry out experiments under different gas environments.
The gas metering detection unit comprises a mixing device, a flowmeter, a first buffer tank and a separation and purification device. The flowmeter is purchased in the market and meets the technical requirements of the natural gas metering system in GB/T18603-2001; the blending device component comprises but not limited to a flowmeter, a valve, a sealing element, a gas mixing pry, a gas component analyzer, a central control console and the like, gas of a gas source enters the first blending device 121 after being metered by the flowmeter, and the device can control the proportion of different hydrogen dopes so as to carry out experiments under gas environments with different hydrogen doping ratios; sampling the mixed gas, performing mixing precision test, and testing the content of each component of the mixed gas under a chromatographic analyzer; the recycled gas is separated and purified by a separation and purification device 19, the separation and purification device adopts methods including but not limited to a cryogenic method, an air separation method, a pressure swing adsorption method, a membrane separation method and the like, and the separation efficiency and the separation purity of the separated and purified hydrogen are tested to check the performance of the separation device; the separated gas flows back to the main pipeline through the second mixing device 122 again to ensure the materials in the circulation process; the flowmeter records the input quantity of the hydrogen gas source, the input quantity of the natural gas source, the output quantity of the mixed gas and the input quantity of the gas which is circulated back, and meanwhile, the gas at several positions can be subjected to component detection through the gas component analyzer, and metering and detection data are transmitted into the gas metering detection unit and are simultaneously transmitted to the hydraulic characteristic monitoring unit and finally are subjected to control processing through the master control chamber.
In the combustion and explosion characteristic testing unit, gas flowing out of the second buffer tank 132 passes through the pressure reducing valve 16, enters the unit, and then flows in multiple paths, and tests which can be carried out include but are not limited to a gas detonation test, a jet fire test, a pipeline explosion test and the like;
the pipeline hydrogen adaptability testing unit comprises a loading module, a detection and evaluation module and three sections of pipelines. The gas flows into the unit through the pipeline connecting system and then flows in three paths; the first path of gas flows into the loading module through the third buffer tank 133, the gas is in a standing state after flowing into the module, and if the standing pressure is changed, the third buffer tank 133 supplements the gas to the module; a second path of gas flows into a pipeline with one end arranged under the air and the other end buried through a transverse pipe, and the soil environment where the real pipeline is located is simulated; the third path of gas flows into a detection and evaluation module, the hydrogen adaptability of the pipeline, parts and equipment is detected in the module by using a carrier gas bin test method, and various damage detection equipment including but not limited to a multi-frequency array eddy current detector, an intelligent multi-frequency eddy current flaw detector and an EMT-200 pipeline detection rotating gun is connected to the inner pipe wall;
the hydraulic characteristic monitoring units are distributed all over the whole circulation chain and monitor the flow, gas transmission power, pipeline pressure drop and dynamic pressure of each unit in the whole circulation process; further, the gas transmission power is the heat load of the pipeline for transmitting gas in unit time, and can represent the gas transmission rate of the pipeline, and is expressed as:Φ= q v Q h, z (ii) a In the formula, phi is gas transmission power, MJ/h; q. q.svIs the volume flow rate, m3/h；Q h, zHigh calorific value of gas MJ/m3(ii) a The recorded data of valve instruments and the like of the whole circulation chain are simultaneously transmitted into the hydraulic characteristic monitoring unit, so that the hydraulic characteristics of the unit in terms of system pipeline pressure drop and dynamic pressure are analyzed; data of a gas metering and analyzing unit on the whole circulation chain are transmitted into the hydraulic characteristic monitoring unit, and the hydraulic characteristic of the system pipeline in the aspect of gas transmission power can be analyzed through gas flow and high gas heat.
The pipeline connecting system runs through the whole cycle, and pipelines, parts, equipment and the like (including buffer tanks, compressors, pressure reducing valves and the like in pipelines) used by all units belong to the system; further, the upper limit of the pressure required by the compressor 14 in the pipeline connecting system at least reaches 20MPa, and the requirement of the change of the pressure range of 0-20 MPa in the pipeline passage is ensured; furthermore, pipelines in the pipeline connecting system are divided into an in-service pipeline and a newly-built pipeline, and the pipe diameter ranges from 400 mm to 800 mm; furthermore, the in-service pipeline is selected from but not limited to an active natural gas pipeline, and the active natural gas pipeline or a pipeline produced by the same technical standard is applied to the test device; furthermore, newly built pipelines in the pipeline system can be customized according to requirements, and newly built pipelines produced by different technical standards can be selected and used for testing by the testing device and the method; preferably, the two pipelines in the pipeline system can carry out gas source transportation with different doping ratios (including pure hydrogen and pure natural gas).
Specific embodiments of the detection evaluation module and the loading module are shown in fig. 2 and fig. 3:
as shown in the left upper part sectional view of fig. 2, the gas-carrying bin 23 is buckled on the pipeline 21 to be tested by using two semi-cylindrical sleeves according to the structural characteristics of half, and as an application example, the two sleeves of the gas-carrying bin are made of austenitic stainless steel and are connected by bolts on bolt holes; seal 27, which is required to realize 4-face sealing: for straight sealing, a sealing groove on one surface is formed, and a sealing strip is placed in the sealing groove; for sealing on a semicircle, a three-layer sealing ring mode is adopted, wherein a first sealing ring 271 is a wedge-shaped sealing ring, a second sealing ring 272 is an O-shaped sealing ring, a third sealing ring 273 is a hard triangular seal, the first sealing ring is higher than a sealing surface, the first sealing surface can be squeezed in the middle when the sealing surface is pressed, the second sealing ring is a main sealing structure, and the third sealing ring is used for preventing the second sealing ring from being squeezed out; a cooling medium pipe 24 is introduced into the cooling medium compressor unit 26 and welded on the inner wall of the gas carrying bin 23, so that the temperature range in the gas carrying bin 23 can be controlled, and the temperature range is planned to be-40-80 ℃; the gas in the inert gas storage unit 25 is introduced into the carrier gas bin 23, and the inert gas and the gas which is possibly leaked in the range of the test pipe section flow out together and flow through the gas detection device 22 to realize leakage detection; further, the diameter of a through hole in the side surface of the air carrying bin 23 is 800mm, a pipeline with the maximum pipe diameter of 800mm can be tested, and for a pipeline with the diameter of 400-800 mm, the difference value of the pipe diameter of 800mm is supplemented by adding double-end rubber flange ferrules 20 at two ends, so that multi-pipe diameter detection is realized;
for the loading module of fig. 3, the gas flows into the module through the connecting elbow 31, and the limit seat 32 ensures the stability of the test pipe 34 to be loaded when loaded; the connecting bent pipe 31 is welded with 4 stoppers 311, the baffle 322 is buckled at the stoppers 311, the connecting bent pipe 31 is buckled through the semi-cylindrical sealing cover 324, and the connecting bent pipe 31 is fixed by bolts, so that the upper, lower, left, right, front and back fixing of the connecting bent pipe 31 can be ensured without freedom degree; furthermore, the connecting bent pipe 31 is connected with a test pipeline through a connecting flange 33, the rear end of the test pipeline is sealed by a sealing flange 35, 8 load applying ports 361 are arranged on the flange, and a load is applied through a load applying device 36, so that the test of tensile, compressive and bending loads of the test pipeline can be realized; it should be noted that the connecting bend 31 is thicker than the test tube, which ensures that the loading force acts on the test tube rather than the connecting bend;
the invention provides a multifunctional hydrogen conveying pipeline test system by utilizing a detection evaluation module and a loading module, and the method comprises the following steps:
for a section of the pipeline to be tested, the overall process is to snap-fit the carrier gas bin 23 to the section of the pipeline to be tested, which may include a valve 211, a meter 212, a connector 214, other parts, and the like; various damage detectors 213 are mounted at the pipe section and used for detecting the defects of cracks, corrosion and the like at the pipeline; after the gas carrying bin 23 is installed, the inert gas in the bin is controlled to circulate, the flux and the components of the inflow gas and the outflow gas are detected by the gas detection device 22, and the leakage amount and the leakage position of a pipe or a part of a detected pipe section can be judged; the carrier gas bin is buckled on the test pipe section of the loading module, so that the hydrogen adaptability of the pipeline under the conditions of tensile, compression and bending loads under variable temperature and variable pressure of the test pipeline can be realized;
the invention designs a multifunctional pure hydrogen/hydrogen-doped pipeline testing device and a method, wherein the global circulation flow direction comprises the following steps:
the gas source gas flows into the gas metering detection unit, flows into the first buffer tank 131 through the plurality of flow meters and the first mixing device 121, and flows into the second buffer tank 132 under the action of the compressor 14; the gas in the second buffer tank 132 is divided into two paths, one path flows to the combustion and explosion characteristic test unit (not participating in circulation), and the other path flows to the pipeline hydrogen adaptability test unit (participating in circulation); and the gas in the pipeline hydrogen adaptability test unit is divided into three paths: the first path is introduced into a loading module (not participating in circulation), the second path is introduced into a pipeline with one end arranged under the air and one end buried, and the third path is introduced into a detection evaluation module; the gas flows into the fourth buffer tank 134 after passing through the pipeline hydrogen adaptability test unit, the gas flows out of the fourth buffer tank 134 and then flows into the gas metering detection unit in two ways, the first way participates in the circulation process, the second way enters the separation and purification device 19, the separated gas can be selectively re-mixed into the pipeline after being detected to participate in the circulation process, and the tests of all the units can be carried out independently or simultaneously in multiple processes.
In the description herein, references to the description of the term "one embodiment," "a preferred embodiment," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily 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.
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 the like, used in the embodiments of the present invention, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any indication of the number of technical features indicated in the embodiments. Thus, a feature of an embodiment of the present invention that is defined by the terms "first," "second," etc. may explicitly or implicitly indicate that at least one of the feature is included in the embodiment. In the description of the present invention, the word "plurality" means at least two or two and more, for example, two, three, four, etc., unless the embodiment is specifically defined otherwise.
In the present invention, unless otherwise explicitly stated or limited by the relevant description or limitation, the terms "mounted," "connected," and "fixed" in the embodiments are to be understood in a broad sense, for example, the connection may be a fixed connection, a detachable connection, or an integrated connection, and it may be understood that the connection may also be a mechanical connection, an electrical connection, etc.; of course, they may be directly connected or indirectly connected through intervening media, or they may be interconnected within one another or in an interactive relationship. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to specific implementation 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.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A multifunctional hydrogen conveying pipeline test system is characterized by comprising: the system comprises a gas source, a gas metering detection unit, a combustion and explosion characteristic test unit, a pipeline hydrogen adaptability test unit, a hydraulic characteristic monitoring unit, a pipeline connecting system and a master control room;
the gas source comprises at least one or more of hydrogen gas, natural gas and hydrogen-loaded natural gas;
the gas metering detection unit comprises a flowmeter, a mixing device, a first buffer tank, a separation device and a mixing precision detection and separation purity detection instrument;
the combustion and explosion characteristic testing unit comprises a combustion and explosion testing device and a combustion and explosion testing field;
the pipeline adaptability testing unit comprises a loading module, a detection and evaluation module, a third buffer tank and three sections of pipeline systems;
the hydraulic characteristic monitoring unit monitors hydraulic characteristics of the whole pipeline test system, wherein the hydraulic characteristics comprise at least one or more of flow, gas transmission power, pipeline pressure drop and dynamic pressure;
the connecting pipeline system at least comprises a plurality of sections of pipelines and a plurality of valves;
the master control room is electrically connected with at least one or more of the gas metering detection unit, the combustion and explosion characteristic testing unit, the pipeline adaptability testing unit and the hydraulic characteristic monitoring unit and executes control.
2. The multifunctional hydrogen conveying pipeline testing system according to claim 1, characterized in that the blending device comprises: the gas mixing device comprises a flowmeter, a valve, a sealing element, a gas mixing pry, a gas component analyzer and a control device, and is used for controlling the gas source to mix so as to obtain the gas to be tested with different hydrogen mixing ratios.
3. The multifunctional hydrogen conveying pipeline test system according to claim 1, wherein the front end of the combustion and explosion characteristic test unit is connected with a second buffer tank, and the gas flows out of the branch gas from the second buffer tank, passes through a pressure reducing valve, is subjected to pressure change, and flows to the unit.
4. The multi-functional hydrogen transport pipeline testing system of claim 1, wherein the pipeline adaptability test unit further comprises a three-way pipeline system comprising a loading module system, a simulated real pipeline system, and a detection and evaluation module system.
5. The multifunctional hydrogen transportation pipeline testing system according to claim 4,
the path of gas of the loading module system is in a standing state, and the gas flows into the loading module through a third buffer tank;
one end of the pipeline in the simulated real pipeline system is arranged in the air, and the other end of the pipeline is buried underground, and is provided with damage detection equipment and a leakage detector for detecting the pipeline condition in the simulated real environment;
the detection and evaluation module system detects hydrogen damage and leakage conditions of pipelines, parts and equipment by using a gas-carrying bin device detection method, and the inner pipe wall is connected with various damage detection equipment.
6. The multifunctional hydrogen transportation pipeline testing system of claim 1, wherein the hydraulic characteristic monitoring unit monitors flow, gas transportation power, pipeline pressure drop and dynamic pressure throughout the cycle.
7. The multifunctional hydrogen transportation pipeline testing system according to claim 1, wherein the connection pipeline system further comprises an in-service pipeline which is an active natural gas pipeline or a pipeline produced according to a prior art standard and a newly-built pipeline which is a pipeline produced according to a standard different from the prior art.
8. The multifunctional hydrogen conveying pipeline testing system according to claim 1, further comprising a carrier gas bin testing device, wherein the carrier gas bin testing device is used for fastening the outer part of a pipeline to be tested in the connecting pipeline system and detecting hydrogen leakage of the pipeline to be tested.
9. The multifunctional hydrogen conveying pipeline testing system according to claim 8, characterized by further comprising a pipeline loading device for applying a load to the pipeline to be tested.
10. The multifunctional hydrogen transportation pipeline test system according to the claims 1-9, characterized in that the test system cycle process comprises: gas source gas flows into the gas metering detection unit, flows into the first buffer tank through the plurality of flow meters and the mixing device, and flows into the second buffer tank under the action of the compressor; the gas in the second buffer tank is divided into two paths, one path flows to the combustion and explosion characteristic testing unit, and the other path flows to the pipeline hydrogen adaptability testing unit; the gas in the pipeline hydrogen adaptability test unit is divided into three paths: the first path is introduced into the loading module through a third buffer tank, the second path is introduced into a pipeline with one end arranged under the air and one end buried, and the third path is introduced into the detection and evaluation module; the gas flows into a fourth buffer tank after passing through a pipeline hydrogen adaptability test unit, the gas flows out of the fourth buffer tank and then flows into a gas metering detection unit in two paths, the first path participates in the circulation process, the second path enters a separation and purification device, and the separated gas can be selectively re-mixed into the pipeline after being detected to participate in the circulation process; the hydraulic characteristic monitoring unit is distributed throughout the whole circulation chain and monitors the hydraulic characteristic of the whole circulation process; the testing of all units can be done individually or multiple processes can be done simultaneously.
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