CN113640127B - Method for testing air entrainment device - Google Patents
Method for testing air entrainment device Download PDFInfo
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- CN113640127B CN113640127B CN202010394350.6A CN202010394350A CN113640127B CN 113640127 B CN113640127 B CN 113640127B CN 202010394350 A CN202010394350 A CN 202010394350A CN 113640127 B CN113640127 B CN 113640127B
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- 238000012360 testing method Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims description 8
- 238000003860 storage Methods 0.000 claims abstract description 40
- 238000010998 test method Methods 0.000 claims abstract description 20
- 238000004140 cleaning Methods 0.000 claims abstract description 8
- 239000007789 gas Substances 0.000 claims description 161
- 239000001257 hydrogen Substances 0.000 claims description 23
- 229910052739 hydrogen Inorganic materials 0.000 claims description 23
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 21
- 238000006073 displacement reaction Methods 0.000 claims description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 8
- 239000011261 inert gas Substances 0.000 claims description 8
- 238000005192 partition Methods 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- 238000010926 purge Methods 0.000 claims description 4
- 230000004888 barrier function Effects 0.000 claims 1
- 238000004880 explosion Methods 0.000 claims 1
- 230000006835 compression Effects 0.000 abstract description 2
- 238000007906 compression Methods 0.000 abstract description 2
- 238000011056 performance test Methods 0.000 abstract description 2
- 238000011076 safety test Methods 0.000 abstract description 2
- 238000005984 hydrogenation reaction Methods 0.000 description 9
- 238000002955 isolation Methods 0.000 description 7
- 238000009661 fatigue test Methods 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 239000003507 refrigerant Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- -1 that is Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0003—Steady
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0044—Pneumatic means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0073—Fatigue
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0262—Shape of the specimen
- G01N2203/0274—Tubular or ring-shaped specimens
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention relates to safety test of gas filling equipment, and discloses a test method of the gas filling equipment, which is characterized by comprising a gas storage container (1), a heat exchanger (2), an input pipeline (5) connected between the gas storage container (1) and an inlet of the heat exchanger (2), and an output pipeline (7) connected to an outlet of the heat exchanger (2), wherein the gas storage container (1) is connected with a pressurizing pipeline (6), and the test method comprises the following steps: a replacement cleaning step; a pressurizing step; and a testing step of opening an input pipeline (5) to input target gas into the heat exchanger (2), closing the input pipeline (5) after a first preset time, opening an output pipeline (7) to discharge the target gas after a second preset time, and measuring the pressure change of the heat exchanger (2) in the second preset time. Through the technical scheme, the compression resistance of the heat exchanger under the high-pressure condition can be monitored, and the pressure fatigue performance test of the heat exchanger is realized.
Description
Technical Field
The invention relates to the field of safety test of air entrainment equipment, in particular to a test method of the air entrainment equipment.
Background
Energy is the basic stone and motive force for development in human society. With the development of social economy, the development of new energy is paid attention to in recent years in various countries in the world facing the challenge of exhaustion of fossil fuel energy, and hydrogen energy is favored in virtue of its advantages of cleanliness, no pollution, high efficiency and the like.
At present, the related technology and engineering application of the hydrogenation station are gradually promoted in China, the process and equipment are gradually mature, the standards and specifications are gradually improved, and the operation is basically safe and reliable. The hydrogen adding machine is used as one of key equipment of the hydrogen adding station, hydrogen reserved in the station is added into the vehicle-mounted hydrogen storage bottle according to a set filling strategy, and the hydrogen storage bottle is ensured not to be overtemperature, overpressure or overcharge. In the hydrogen filling process, the outside works on the hydrogen storage bottle, the thermal effect of Joule-Thomson and kinetic energy conversion heat, the temperature of the hydrogen in the hydrogen storage bottle can be increased, so that the density of the hydrogen is reduced, when the pressure reaches a set pressure value, the actually filled hydrogen amount cannot reach the amount required to be filled, and meanwhile, the service life, the safety and the like of the hydrogen storage bottle can be influenced due to the fact that the hydrogen temperature is too high, so that in the current general hydrogen filling method, the hydrogen can be pre-cooled. The heat exchanger is a device which is arranged in the hydrogenation machine and used for precooling heat exchange of hydrogen, and is mainly divided into three types, namely a micro-channel type heat exchanger, a shell coil type heat exchanger and a sleeve type heat exchanger.
The air tightness of the heat exchanger for the hydrogenation machine is usually tested according to the standard of the hydrogenation machine, but because the shell-and-coil heat exchanger adopts three or more 3/8 'stainless steel pipes to rotate and spiral, a plurality of clamping sleeve joints can only be used for converging the stainless steel pipes into a middle-high pressure joint to be connected with the 9/16' stainless steel pipes to enter the hydrogenation machine, the working pressure of the clamping sleeve joints is 6000PSI, and the working pressure of the clamping sleeve joints is far less than the pressure resistance of the middle-high pressure joint used on the hydrogenation machine by at least 10000PSI, even if the heat exchanger passes the test according to the air tightness standard of the hydrogenation machine, the fatigue test of the heat exchanger for the hydrogenation machine is very necessary. At present, few studies on fatigue tests of heat exchangers of hydrogenation machines at home and abroad are reported.
Disclosure of Invention
The invention aims to provide a test method of air entrainment equipment so as to realize pressure fatigue test of a heat exchanger in the air entrainment equipment.
In order to achieve the above object, the present invention provides a method for testing an air-entraining apparatus, wherein the air-entraining apparatus includes an air container, a heat exchanger, an input pipeline connected between the air container and an inlet of the heat exchanger, and an output pipeline connected to an outlet of the heat exchanger, the air container is connected with a pressurizing pipeline, the method includes:
a replacement cleaning step, namely replacing non-target gas in the gas storage container, the input pipeline, the heat exchanger and the output pipeline by target gas through the pressurizing pipeline;
A pressurizing step, namely inputting target gas into the gas storage container through a pressurizing pipeline, so that the pressure in the gas storage container reaches the maximum working pressure;
And a testing step of opening an input pipeline to input target gas into the heat exchanger, closing the input pipeline after a first preset time, opening an output pipeline to discharge the target gas after a second preset time, and measuring the pressure change of the heat exchanger in the second preset time.
Optionally, the replacement cleaning step includes:
An intermediate gas replacement step of opening the pressurizing pipe and the input pipe, closing the output pipe to input inert gas into the gas storage container, the input pipe and the heat exchanger, then closing the pressurizing pipe and the input pipe, and opening the output pipe to discharge the inert gas;
And a target gas replacement step of opening the pressurizing pipeline and the input pipeline, closing the output pipeline to input target gas into the gas storage container, the input pipeline and the heat exchanger, closing the pressurizing pipeline and the input pipeline, and opening the output pipeline to discharge the target gas.
Optionally, the target gas is hydrogen and the intermediate gas is nitrogen.
Optionally, repeating the intermediate gas displacement step a plurality of times; and/or repeating the target gas displacement step a plurality of times.
Alternatively, a plurality of sets of the pressurizing step and the testing step are repeated.
Alternatively, the first predetermined time is 30 seconds to 35 seconds, and the second predetermined time is 60 seconds to 70 seconds.
Alternatively, the maximum working pressure is 40MPa-45MPa, and the maximum working pressure is 1.5 times of the rated working pressure.
Optionally, the output pipeline is connected with a discharge pipeline capable of communicating with the environment and a collection pipeline connected with the collection container.
Optionally, in the displacement purge step, the bleed line is opened to open the output line.
Optionally, in the testing step, the bleed line is opened to vent the target gas.
Optionally, in the testing step, the collecting line is opened to introduce the target gas into the collecting container, and when the rated operating pressure is reached in the collecting container, another collecting container is replaced.
Optionally, a return line is connected between the collecting line and the pressurizing line.
Optionally, the input line, the boost line, the output line, the bleed line, the return line are controllably connected to a control unit.
Optionally, the outside of the air entrainment device is provided with a closed explosion-proof isolation wall, and the output pipeline can be communicated with the outside of the explosion-proof isolation wall.
Optionally, the gas filling device comprises a target gas concentration monitor arranged on the inner side of the explosion-proof partition wall.
Through the technical scheme, the compression resistance of the heat exchanger under the high-pressure condition can be monitored, and the pressure fatigue performance test of the heat exchanger is realized.
Drawings
Fig. 1 is a schematic diagram of a method of testing an air entrainment device according to an embodiment of the invention.
Description of the reference numerals
1-Gas storage container, 2-heat exchanger, 3-collecting container, 4-gas supply container, 5-input pipeline, 6-pressurizing pipeline, 7-output pipeline, 8-bleeder pipeline, 9-collecting pipeline, 10-return pipeline, 11-first valve, 12-second valve, 13-third valve, 14-fourth valve, 15-fifth valve, 16-first check valve, 17-second check valve, 18-third check valve, 19-booster pump, 20-first pressure gauge, 21-second pressure gauge, 22-third pressure gauge, 23-explosion-proof partition wall, 24-target gas concentration monitor, 25-control unit, 26-flowmeter.
Detailed Description
The following describes specific embodiments of the present invention in detail with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the invention, are not intended to limit the invention.
The invention provides a test method of gas filling equipment, wherein the gas filling equipment comprises a gas storage container 1, a heat exchanger 2, an input pipeline 5 connected between the gas storage container 1 and an inlet of the heat exchanger 2, and an output pipeline 7 connected to an outlet of the heat exchanger 2, and the gas storage container 1 is connected with a pressurizing pipeline 6, and the test method comprises the following steps:
a replacement cleaning step of replacing non-target gas in the gas storage container 1, the input pipeline 5, the heat exchanger 2 and the output pipeline 7 with target gas through the pressurizing pipeline 6;
A pressurizing step of inputting target gas into the gas storage container 1 through a pressurizing pipeline 6 so that the pressure in the gas storage container 1 reaches the maximum working pressure;
And a testing step of opening an input pipeline 5 to input target gas into the heat exchanger 2, closing the input pipeline 5 after a first preset time, opening an output pipeline 7 to discharge the target gas after a second preset time, and measuring the pressure change of the heat exchanger 2 during the second preset time.
As shown in fig. 1, a second valve 12 and a flow meter 26 are arranged on an input pipeline 5 between the gas storage container 1 and the heat exchanger 2, and the gas storage container 1 can convey gas into the heat exchanger 2 through the input pipeline 5; the heat exchanger 2 is internally provided with a refrigerant pipeline and a gas transmission pipeline which are mutually and thermally coupled, the inlet of the gas transmission pipeline is connected with the input pipeline 5, the outlet of the gas transmission pipeline is connected with the output pipeline 7, the refrigerant pipeline can transmit refrigerant so as to cool gas from the gas storage container 1 in the gas transmission pipeline, and the gas is discharged to other equipment through the output pipeline 7; in addition, a first pressure gauge 20 is connected to the input line 5 to monitor the pressure in the air container 1; the output pipeline 7 is provided with a second one-way valve 17 for preventing gas from flowing back into the heat exchanger 2, and the output pipeline 7 is connected with a second pressure gauge 21 for monitoring the gas pressure in the heat exchanger 2, so that the pressure fatigue test of the heat exchanger 2 is realized.
In addition, the gas container 1 is connected with a pressurizing pipe 6 to charge the gas into the gas container 1 through the pressurizing pipe 6 so that the gas pressure in the gas container 1 reaches a target pressure, such as the maximum working pressure described above; the pressurizing pipeline 6 is sequentially provided with a first valve 11, a pressurizing pump 19 and a first one-way valve 16, and can be connected with the gas supply container 4, and the pressurizing pump 19 can convey the gas in the gas supply container 4 to the gas storage container 1 so as to achieve the target pressure.
The testing method is mainly used for testing the pressure fatigue performance of the heat exchanger, and in the testing method, firstly, non-target gas in each pipeline and the container is replaced by target gas through a replacement cleaning step, so that the relevant pressure fatigue test can be conveniently carried out by using purer target gas; then, adding target gas with the maximum working pressure into the gas storage container 1 through a pressurizing step; in the testing step, the input pipeline 5 is opened first, gas is input into the heat exchanger 2 in a first preset time, high pressure is formed in the gas pipeline of the heat exchanger 2 because the output pipeline 7 is not opened, after the input pipeline 5 is closed, the pressure in the heat exchanger 2 is stable, and after the second preset time is kept, the output pipeline 7 is opened to release the high pressure gas in the heat exchanger 2; and, during this second predetermined time period, the pressure change in the heat exchanger 2 is monitored, and the pressure fatigue test of the heat exchanger 2 is realized.
Specifically, the replacement cleaning step includes:
An intermediate gas replacement step of opening the pressurizing pipe 6 and the input pipe 5, closing the output pipe 7 to input inert gas into the gas storage container 1, the input pipe 5 and the heat exchanger 2, then closing the pressurizing pipe 6 and the input pipe 5, and opening the output pipe 7 to discharge inert gas;
And a target gas replacement step of opening the pressurizing pipe 6 and the input pipe 5, closing the output pipe 7 to input target gas into the gas storage container 1, the input pipe 5 and the heat exchanger 2, closing the pressurizing pipe 6 and the input pipe 5, and opening the output pipe 7 to discharge the target gas.
In some cases, the non-target gas and the target gas react and even explode after being mixed with each other, so the non-target gas can be replaced by using the intermediate gas, that is, inert gas is filled into the pipeline and the container to discharge the non-target gas; the intermediate gas is replaced with the target gas, and similarly, the pipeline and the container are filled with the target gas to discharge the intermediate gas.
Optionally, the target gas is hydrogen and the intermediate gas is nitrogen. The scheme can be used for the air filling equipment of hydrogen, and the air in each pipeline can be discharged by using nitrogen during testing so as to avoid mixing of hydrogen and oxygen in the air. In other embodiments, the target gas may be any gas that needs to be preserved for use, such as oxygen, chlorine, carbon monoxide, etc.; the intermediate gas may be other inert gases such as argon, or any gas that does not react with air, the target gas.
Wherein the intermediate gas displacement step is repeated a plurality of times; and/or repeating the target gas displacement step a plurality of times. That is, the concentration of the intermediate gas in the piping and the vessel is made higher by the intermediate gas replacement step plural times to discharge the non-target gas as much as possible; then, the target gas is filled into the pipeline and the container through a plurality of target gas replacement steps, so that the concentration of the intermediate gas is reduced as much as possible. The intermediate gas replacement step may be repeated 3 times and the target gas replacement step may be repeated 3 times, although other times are possible.
In addition, a plurality of sets of the pressurizing step and the testing step are repeated. Each pressurizing step and each testing step are a group, and in order to test the pressure fatigue performance of the heat exchanger 2 under high-pressure gas for multiple times, the high-pressure gas can be charged and discharged for multiple times, and the pressure change in the high-pressure gas can be monitored in real time.
Specifically, the first preset time is 30 seconds to 35 seconds, and the second preset time is 60 seconds to 70 seconds. That is, in the test step, the input line 5 is opened first, the high-pressure target gas is charged into the heat exchanger 2 for 30 seconds to 35 seconds, and then the input line 5 is disconnected; after the high pressure gas in the heat exchanger 2 is maintained for 60 seconds to 70 seconds, the output line 7 is opened to release the high pressure gas in the heat exchanger 2.
Wherein the maximum working pressure is 40MPa-45MPa, and the maximum working pressure is 1.5 times of the rated working pressure. The maximum working pressure can be regarded as the limit safety pressure of the gas filling device, the rated working pressure is the gas pressure used under the common working condition, the pressure in the gas storage container 1 is controlled to be the maximum working pressure, and the pressure fatigue performance of the heat exchanger 2 under the limit condition can be tested.
The output line 7 is connected to a drain line 8 that can communicate with the environment and a collection line 9 that is connected to the collection container 3. The third valve 13 and the third one-way valve 18 are arranged on the discharge pipeline 8, the third valve 13 can control the opening and closing of the discharge pipeline 8, the third one-way valve 18 can avoid gas backflow, and the gas from the output pipeline 7 can be discharged into the atmosphere through the discharge pipeline 8. The collecting line 9 is provided with a fourth valve 14 and is connected to the collecting vessel 3, and the collecting vessel 3 can receive the discharged gas from the output line 7, collect it and store it for the next use. The discharge line 8 and the collection line 9 are parallel to each other and can be selectively opened either or, of course, all to receive the gas from the output line 7.
In addition, in the displacement purge step, the bleed line 8 is opened to open the output line 7. The bleed line 8 can vent non-target gases and intermediate gases from the displacement purge step to the atmosphere, generally without the need to re-collect these gases.
According to one embodiment of the present solution, in the test step, the bleed line 8 is opened to exhaust the target gas. If only the maximum working pressure (e.g., 45 MPa) pair-filling and pressure-maintaining experiments are performed, the fourth valve 14 may be opened to vent the target gas (e.g., hydrogen) to the atmosphere during the test step.
According to another embodiment of the present solution, in the test step, the collecting line 9 is opened to introduce the target gas into the collecting container 3, and when the rated operating pressure is reached in the collecting container 3, another collecting container 3 is replaced. In this embodiment, the gas pair of the maximum operating pressure is charged into the collection container 3 through the gas storage container 1 so that the pressure in the collection container 3 reaches the rated operating pressure; the collection container 3 reaching the rated working pressure can be connected with the pressurizing pipeline 6 and used for re-filling high-pressure gas into the gas storage container 1 so as to realize the recycling of target gas. The collecting pipeline 9 is connected with a third pressure gauge 22, so that the pressure in the collecting container 3 can be monitored in real time.
Further, a return line 10 is connected between the collecting line 9 and the pressurizing line 6. Referring to fig. 1, a return line 10 is connected to the collecting line 9 at a connection point between the fourth valve 14 and the collecting container 3, a fifth valve 15 is provided to the return line 10, and the collecting container 3 can be connected to the pressurizing line 6 by opening the fifth valve 15 to transfer the gas in the collecting container 3 to the gas storage container 1.
Wherein the inlet line 5, the pressure increasing line 6, the outlet line 7, the discharge line 8, the return line 10 are controllably connected to a control unit 25. Referring to fig. 1, the first valve 11, the second valve 12, the third valve 13, the fourth valve 14, the fifth valve 15, and the booster pump 19 on each line are connected to a control unit 25, and the control unit 25 may electrically, pneumatically, or hydraulically control each respective component to achieve each operational step.
In addition, the outside of the air entrainment device is provided with a closed explosion-proof isolation wall 23, and the output pipeline 7 can be communicated with the outside of the explosion-proof isolation wall 23. The explosion-proof isolation wall 23 can enclose a closed structure, each container and pipeline are located on the inner side of the explosion-proof isolation wall 23, and only the discharge pipeline 8 is communicated to the outside of the explosion-proof isolator so as to guide the gas exhausted by the output pipeline 7 to the outside of the explosion-proof isolation wall 23.
Further, the gas filling apparatus includes a target gas concentration monitor 24 provided inside the explosion-proof partition wall 23. The target gas concentration monitor 24 can monitor the inner side of the explosion-proof partition wall 23 to cope with leakage of the heat exchanger 2 or other pipelines and components, and particularly when the target gas is inflammable and explosive, if the target gas concentration is increased, measures should be taken timely.
The gas storage container 1, the gas supply container 4 and the collection container 3 in the scheme can be steel cylinders.
The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, a plurality of simple variants of the technical proposal of the invention can be carried out, comprising that each specific technical feature is combined in any suitable way, and in order to avoid unnecessary repetition, the invention does not need to be additionally described for various possible combinations. Such simple variations and combinations are likewise to be regarded as being within the scope of the present disclosure.
Claims (14)
1. The method for testing the gas filling equipment is characterized by comprising a gas storage container (1), a heat exchanger (2), an input pipeline (5) connected between the gas storage container (1) and an inlet of the heat exchanger (2) and an output pipeline (7) connected to an outlet of the heat exchanger (2), wherein the gas storage container (1) is connected with a pressurizing pipeline (6), and the method for testing the gas filling equipment comprises the following steps:
A replacement cleaning step, namely replacing non-target gas in the gas storage container (1), the input pipeline (5), the heat exchanger (2) and the output pipeline (7) by target gas through the pressurizing pipeline (6);
a pressurizing step, namely inputting target gas into the gas storage container (1) through a pressurizing pipeline (6) so that the pressure in the gas storage container (1) reaches the maximum working pressure;
A testing step of opening an input pipeline (5) to input target gas into the heat exchanger (2), closing the input pipeline (5) after a first preset time, opening an output pipeline (7) to discharge the target gas after a second preset time, and measuring the pressure change of the heat exchanger (2) in the second preset time;
wherein, the replacement cleaning step includes:
An intermediate gas replacement step of opening the pressurizing pipe (6) and the input pipe (5), closing the output pipe (7) to input inert gas into the gas storage container (1), the input pipe (5) and the heat exchanger (2), then closing the pressurizing pipe (6) and the input pipe (5), and opening the output pipe (7) to discharge inert gas;
And a target gas replacement step of opening the pressurizing pipeline (6) and the input pipeline (5), closing the output pipeline (7) to input target gas into the gas storage container (1), the input pipeline (5) and the heat exchanger (2), closing the pressurizing pipeline (6) and the input pipeline (5), and opening the output pipeline (7) to discharge the target gas.
2. A method of testing an air entrainment device according to claim 1 wherein the target gas is hydrogen and the intermediate gas is nitrogen.
3. A method of testing an air entrainment device according to claim 1 wherein the intermediate gas displacement step is repeated a plurality of times; and/or repeating the target gas displacement step a plurality of times.
4. A method of testing an air entrainment device according to claim 1 wherein a plurality of sets of said pressurizing step and said testing step are repeated.
5. A method of testing an air entrainment device according to claim 1 wherein the first predetermined time is from 30 seconds to 35 seconds and the second predetermined time is from 60 seconds to 70 seconds.
6. A method of testing an air entrainment device according to claim 1 wherein the maximum operating pressure is from 40MPa to 45MPa and the maximum operating pressure is 1.5 times the rated operating pressure.
7. A method of testing an air entrainment device according to claim 1, characterized in that the output line (7) is connected with a bleed line (8) which can be connected with the environment and a collecting line (9) which is connected to the collecting vessel (3).
8. A method of testing an air entrainment device according to claim 7, characterized in that in the displacement purge step the bleed line (8) is opened to open the output line (7).
9. A method of testing an air entrainment device according to claim 7, characterized in that in the testing step the bleed line (8) is opened to expel target gas.
10. A method of testing an air entrainment device according to claim 7, characterized in that in the testing step the collecting line (9) is opened to introduce target gas into the collecting vessel (3) and when the nominal operating pressure is reached in the collecting vessel (3) it is replaced by another collecting vessel (3).
11. A method of testing an air entrainment device according to claim 10, characterized in that a return line (10) is connected between the collecting line (9) and the pressurizing line (6).
12. A method of testing an air entrainment device according to claim 11, characterized in that the inlet line (5), the pressure increasing line (6), the outlet line (7), the discharge line (8), the return line (10) are controllably connected to a control unit.
13. A method of testing an air entrainment device according to claim 1, characterized in that the air entrainment device is provided externally with a closed explosion-proof partition (23), the output line (7) being communicable with the outside of the explosion-proof partition (23).
14. A method of testing a gas filling apparatus according to claim 13, wherein the gas filling apparatus comprises a target gas concentration monitor (24) arranged inside the explosion proof barrier (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010394350.6A CN113640127B (en) | 2020-05-11 | 2020-05-11 | Method for testing air entrainment device |
Applications Claiming Priority (1)
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