CN212364208U - Testing device of fuel cell hydrogen eliminator - Google Patents
Testing device of fuel cell hydrogen eliminator Download PDFInfo
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- CN212364208U CN212364208U CN202021450804.9U CN202021450804U CN212364208U CN 212364208 U CN212364208 U CN 212364208U CN 202021450804 U CN202021450804 U CN 202021450804U CN 212364208 U CN212364208 U CN 212364208U
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Abstract
The utility model provides a testing arrangement of fuel cell hydrogen elimination ware, include: the test main pipeline is provided with an air inlet end and an air outlet end at two ends, the air inlet end is used for conveying mixed gas required by the test, and the mixed gas consists of air, nitrogen and hydrogen; the downstream pipeline of the air inlet end is provided with an oxygen concentration detector, a first hydrogen concentration detector, a humidity sensor, a temperature sensor, a pressure sensor and a first gas flowmeter; the downstream pipeline of the first gas flowmeter is connected to a hydrogen eliminator, pipelines at two ends of the hydrogen eliminator are respectively provided with a sampling port, and a pressure drop tester is connected between the two sampling ports; and a downstream pipeline of the dehydrogenation device is provided with a second hydrogen concentration detector for detecting the concentration of hydrogen in the pipeline after dehydrogenation. The utility model discloses an exhaust complicated operating mode of simulation fuel cell rear of a vehicle to the realization is synthesized the aassessment to fuel cell hydrogen elimination ware's the performance of removing hydrogen and efficiency.
Description
Technical Field
The utility model relates to a hydrogen fuel cell car technical field, in particular to testing arrangement of fuel cell hydrogen elimination ware.
Background
The fuel cell passenger car has the application scene of passing through the tunnel, parking in underground garage, and fuel cell fork truck often needs to be in indoor confined space operation, and the hydrogen of not having reacted in the fuel cell positive pole tail gas directly discharges to the confined space if not through any processing, and the accumulation of hydrogen is gathered and is easily caused very big potential safety hazard. The fuel cell hydrogen eliminator is used for eliminating unreacted hydrogen in the tail gas of the fuel cell, and the hydrogen elimination performance of the fuel cell hydrogen eliminator needs to be evaluated by a relatively complete and mature testing method and device to assist the development of the fuel cell automobile industry.
The fuel cell vehicle directly discharges hydrogen, and the hydrogen is required to be subjected to dehydrogenation treatment by a dehydrogenation unit and then discharged into ambient air, so that potential safety hazards caused by hydrogen accumulation are eliminated. Under complex working conditions of high and low temperature, high humidity and the like, whether the hydrogen elimination efficiency of the hydrogen eliminator is influenced or not is required, so that a set of complete testing device and method are required, the hydrogen elimination performance and efficiency of the hydrogen eliminator under the environments of high temperature, high saturation humidity, large flow, low concentration hydrogen and the like can be tested simultaneously, and the hydrogen elimination performance of the fuel cell hydrogen eliminator is identified and evaluated.
Patent number CN201210562972.0 discloses a test system and a test method for the hydrogen elimination performance of a catalyst, which can record the temperature, pressure, hydrogen content and relative humidity of the inlet and outlet of a catalytic reactor along with the time change through a data acquisition control system, and can simulate the design reference accident state of a containment vessel of a nuclear power station. However, compared with the working condition of the using environment of the hydrogen eliminator for the nuclear power station, the working condition of the tail exhaust environment of the fuel cell vehicle is more complex, firstly, the concentration of oxygen in the tail exhaust of the fuel cell vehicle is low, the concentration of oxygen in the tail exhaust of the fuel cell vehicle is not more than 10 percent normally, and the concentration of oxygen in the tail exhaust of the fuel cell vehicle is far lower than the concentration of oxygen in normal air by; secondly, the temperature is high, the humidity is high, the exhaust temperature of the tail of the fuel cell vehicle is as high as 80-110 ℃, the humidity is close to a saturated state, and the working condition is different from that of the working environment of a common hydrogen eliminator; third, the flow rate is high, and the fuel cell vehicle tail exhaust flow rate is high.
SUMMERY OF THE UTILITY MODEL
In view of this, the main objective of the present invention is to provide a testing apparatus and method for a fuel cell hydrogen eliminator, which can comprehensively evaluate the hydrogen eliminating performance and efficiency of the fuel cell hydrogen eliminator by simulating the complicated working condition of exhaust at the tail of the fuel cell vehicle.
The utility model discloses a technical scheme do, a testing arrangement of fuel cell hydrogen elimination ware, include:
the test main pipeline is provided with an air inlet end and an air outlet end at two ends, the air inlet end is used for conveying mixed gas required by the test, and the mixed gas consists of air, nitrogen and hydrogen;
the downstream pipeline of the air inlet end is provided with an oxygen concentration detector, a first hydrogen concentration detector, a humidity sensor, a temperature sensor, a pressure sensor and a first gas flowmeter;
the downstream pipeline of the first gas flowmeter is connected to a hydrogen eliminator, pipelines at two ends of the hydrogen eliminator are respectively provided with a sampling port, and a pressure drop tester is connected between the two sampling ports;
and a downstream pipeline of the dehydrogenation device is provided with a second hydrogen concentration detector for detecting the concentration of hydrogen in the pipeline after dehydrogenation.
By last, when testing, open the mixing storehouse, the messenger is by the air, the mixed gas that nitrogen gas and hydrogen are constituteed enters into the test main line through this testing arrangement's inlet end, and detect the hydrogen concentration in the mixed gas through first hydrogen concentration detector, the mixed gas enters into the hydrogen elimination ware through the test main line and disappears after handling, rethread second hydrogen concentration detector detects the hydrogen concentration after handling of removing hydrogen, can obtain the efficiency of removing hydrogen of hydrogen elimination ware according to twice testing result, this device is through the carminative complicated operating mode of simulation fuel cell rear of a vehicle, in order to realize carrying out the comprehensive assessment to the performance and the efficiency of removing hydrogen of fuel cell hydrogen elimination ware.
Optionally, the device further comprises a mixing bin, wherein an air inlet of the mixing bin is respectively connected with an air inlet, a hydrogen inlet and a nitrogen inlet through pipelines;
the mixing bin is internally provided with a fan which is used for stirring and mixing air, nitrogen and hydrogen and then conveying the air, nitrogen and hydrogen to the air inlet end of the main testing pipeline.
By last, utilize the mixing storehouse can stir the mixing with air, nitrogen gas and hydrogen, make it satisfy the required mist condition of test, simultaneously, this mixing storehouse should adopt sealed anticorrosive material, makes the fan work in its inside, avoids the air to leak and causes the pollution.
Optionally, the hydrogen inlet is connected to a hydrogen cylinder filled with pure hydrogen gas, and a first pressure regulating valve, a first electromagnetic valve and a second gas flow meter are arranged at an air outlet of the hydrogen cylinder.
Therefore, the first pressure regulating valve is used for regulating the pressure of the gas outlet of the hydrogen cylinder, the first electromagnetic valve is used for controlling the flow and the purging time of hydrogen entering the main pipeline, and the second gas flowmeter is used for controlling the flow rate of the hydrogen.
Optionally, the nitrogen gas inlet is connected to a nitrogen gas cylinder filled with pure nitrogen gas, and a second pressure regulating valve and a third gas flow meter are arranged at the gas outlet of the nitrogen gas cylinder.
Therefore, the second pressure regulating valve is used for regulating the pressure of the gas outlet of the nitrogen gas cylinder, and the third gas flowmeter is used for controlling the flow rate of the nitrogen gas.
Optionally, the air inlet is provided with a filter.
Therefore, the filter can be used for removing particulate matters in air and gas which easily poisons a catalyst of the hydrogen eliminator, so that the air entering the main pipeline is kept clean.
Optionally, a humidifier and a heater are further arranged on the pipeline between the air inlet, the hydrogen inlet and the mixing bin, and are used for humidifying and heating the mixed gas of air and nitrogen.
By last, the humidifier is used for the test gas that the humidification got into in the test main line, and the heater is used for heating the test gas that gets into in the test main line, and humidity and temperature all can be adjusted according to the test needs.
Optionally, a second electromagnetic valve is arranged at the front end of the hydrogen eliminator.
From above, the second solenoid valve is used for controlling the flow and the time that the gas mixture enters the hydrogen eliminator.
Optionally, the test main pipeline and the blending bin are made of stainless steel.
Therefore, the mixed gas contains hydrogen with higher concentration, and the aim of resisting hydrogen embrittlement can be fulfilled by adopting a stainless steel material.
The application also provides a test method of the fuel cell hydrogen eliminator, which adopts the test device of the fuel cell hydrogen eliminator and comprises the following steps:
after the air, the nitrogen and the hydrogen are stirred and mixed uniformly through a mixing bin, the mixture is conveyed to a main testing pipeline;
measuring the hydrogen concentration before dehydrogenation by a first hydrogen concentration detector at the upstream of the dehydrogenation unit;
testing the pressure drop at two ends of the hydrogen eliminator by a pressure drop tester at two ends of the hydrogen eliminator, and measuring the hydrogen concentration after hydrogen elimination by a second hydrogen concentration detector at the downstream of the hydrogen eliminator after the pressure drop requirement is met;
and calculating the dehydrogenation efficiency of the dehydrogenation unit according to the hydrogen concentration before dehydrogenation and the hydrogen concentration after dehydrogenation.
According to the method, air, nitrogen and hydrogen are mixed through the mixing bin, the complicated working condition of tail gas exhaust of the fuel cell vehicle is achieved, meanwhile, the wind resistance pressure drop at the two ends of the hydrogen eliminator is tested, the hydrogen concentration in the main pipeline of the hydrogen eliminator is tested at the front end and the rear end of the hydrogen eliminator, the hydrogen elimination efficiency of the hydrogen eliminator is obtained through calculation, the hydrogen elimination performance of the fuel cell hydrogen eliminator can be judged according to the wind resistance pressure drop and the hydrogen elimination efficiency of the hydrogen eliminator to carry out overall evaluation, and whether the index requirement of the hydrogen concentration in the tail gas exhaust of the fuel cell can be met or not is evaluated.
Optionally, it includes to mix air, nitrogen gas and hydrogen through mixing storehouse evenly:
opening a second electromagnetic valve and a blending bin on the testing main pipeline, enabling air to enter the blending bin after passing through a filter, opening a valve of a nitrogen cylinder, and enabling nitrogen after pressure reduction to enter the blending bin by adjusting a second pressure regulating valve and a third gas flowmeter at an air outlet of the nitrogen cylinder to be mixed with the air;
opening a humidifier and a heater, and humidifying and heating air and nitrogen in a pipeline to meet the humidity and temperature required by the test;
and opening a valve of the hydrogen cylinder, enabling the decompressed hydrogen to enter the blending bin by adjusting a first pressure regulating valve and a second gas flowmeter at the gas outlet of the hydrogen cylinder, mixing the decompressed hydrogen with air and nitrogen, and controlling the purging time of the hydrogen by adjusting a first solenoid valve.
By last, through making air, nitrogen gas and hydrogen get into the mixing storehouse in proper order to through humidifying, heating air and nitrogen gas, make the mist in mixing storehouse can simulate out exhaust environment operating mode such as high temperature, high saturation humidity, large-traffic, low concentration hydrogen, thereby realize the performance test that disappears to the hydrogen elimination ware under various environment operating modes.
Drawings
FIG. 1 is a schematic diagram of a testing device of the fuel cell hydrogen eliminator of the present invention;
fig. 2 is a flow chart of a testing method of the fuel cell hydrogen eliminator according to the present invention.
Description of the symbols
The system comprises a test main pipeline 101, a blending bin 102, an oxygen concentration detector 103, a hydrogen concentration detector 104, a humidity sensor 105, a temperature sensor 106, a pressure sensor 107, a gas flowmeter 108, an electromagnetic valve 109, a fuel cell hydrogen eliminator 110, a pressure drop tester 111, a hydrogen concentration detector 112, an air filter 113, a humidifier 114, a heater 115, a nitrogen cylinder 116, a pressure regulating valve 117, a gas flowmeter 118, a hydrogen cylinder 119, a pressure regulating valve 120, an electromagnetic valve 121 and a gas flowmeter 122.
Detailed Description
The utility model aims to provide a testing arrangement and method of fuel cell hydrogen elimination ware through the carminative complicated operating mode of simulation fuel cell rear of a vehicle, can be arranged in the laboratory to the authentication test of fuel cell hydrogen elimination ware, also can be used to the quality inspection control detection before fuel cell hydrogen elimination ware production line dispatches from the factory.
The working principle and working procedure of the present invention will be described in detail with reference to the embodiments shown in the drawings.
As shown in fig. 1, the preferred embodiment of the present invention provides a testing device for a fuel cell hydrogen eliminator, which includes a main testing pipeline 101, an air filter 113 on the pipeline, a humidifier 114, a heater 115, a blending chamber 102, an oxygen concentration detector 103, a hydrogen concentration detector 104, a humidity sensor 105, a temperature sensor 106, a pressure sensor 107, a gas flow meter 108, an electromagnetic valve 109, a fuel cell hydrogen eliminator 110, a pressure drop tester 111, and a hydrogen concentration detector 112.
The testing main pipeline 101 is made of stainless steel, two ends of the testing main pipeline are provided with an air inlet end and an air outlet end, and the air inlet end is respectively provided with an air inlet, a nitrogen inlet and a hydrogen inlet;
an air filter 113 is arranged at the air inlet and used for removing particulate matters in air and gas which easily poisons a catalyst of the hydrogen eliminator 110 so as to keep the air entering the main test pipeline 101 clean, a humidifier 114 and a heater 115 are arranged on a downstream pipeline of the air filter 113, the humidifier 114 is used for humidifying mixed gas entering the main test pipeline 101, the heater 115 is used for heating the mixed gas entering the main test pipeline 10, and the humidity and the temperature can be adjusted according to test requirements;
the nitrogen inlet is arranged on a pipeline between the air filter 113 and the humidifier 114, the nitrogen inlet is connected with a nitrogen cylinder 116 filled with pure nitrogen through a hose and is used for diluting the air entering the humidifier 114 to keep the oxygen concentration in the air within a proper range so as to simulate the oxygen concentration content in the tail exhaust of the fuel cell vehicle, a cylinder mouth valve is arranged on the nitrogen cylinder 116 and is used for opening or closing, a pressure regulating valve 117 and a gas flow meter 118 are arranged on a pipeline between the nitrogen cylinder 116 and the nitrogen inlet, the pressure regulating valve 117 is used for regulating the outlet pressure of the nitrogen, and the gas flow meter 118 is used for controlling the flow rate of the nitrogen;
the hydrogen inlet is arranged on a pipeline between the heater 115 and the blending bin 102, the hydrogen inlet is connected with a hydrogen cylinder 119 filled with pure hydrogen gas through a hose, a bottleneck valve is arranged on the hydrogen cylinder 119 and used for opening or closing, a pressure regulating valve 120, an electromagnetic valve 121 and a gas flowmeter 122 are arranged on the pipeline between the hydrogen cylinder 119 and the hydrogen inlet, the pressure regulating valve 120 is used for regulating the outlet pressure of the hydrogen gas, the electromagnetic valve 121 is used for controlling the flow of the hydrogen gas entering the main pipeline, and the gas flowmeter 122 is used for controlling the flow rate of the hydrogen gas;
the blending bin 102 is made of corrosion-resistant stainless steel and can resist hydrogen embrittlement, a fan is arranged in the blending bin, the fan is an explosion-proof fan, air entering from an air inlet, nitrogen entering from a nitrogen inlet and hydrogen entering from a hydrogen inlet are stirred and blended by the fan, and then mixed gas required by testing is output;
an oxygen concentration detector 103 and a hydrogen concentration detector 104 are arranged on a downstream pipeline of the blending bin 102, the oxygen concentration detector 103 is used for detecting the oxygen concentration content in the blended mixed gas, and the hydrogen concentration detector 104 is used for detecting the hydrogen concentration content in the blended mixed gas so as to meet the requirement of test conditions and ensure the reliability of the test;
a downstream pipeline of the hydrogen concentration detector 104 is provided with a humidity sensor 105, a temperature sensor 106 and a pressure sensor 107, wherein the humidity sensor 105 and the temperature sensor 106 are respectively used for testing the humidity and the temperature of the mixed gas output by the blending bin 102, and the pressure sensor 107 is used for testing the pressure of the mixed gas so as to meet the requirements of testing conditions and ensure the reliability of the test;
a gas flowmeter 108 is arranged on a downstream pipeline of the pressure sensor 107, wherein the gas flowmeter 108 is used for detecting the flow rate and the air volume of the mixed gas passing through the fuel cell hydrogen eliminator 110 so as to meet the requirements of test conditions and ensure the accuracy and reliability of the test;
the downstream pipeline of the gas flow meter 108 is connected to a fuel cell hydrogen eliminator 110 through an electromagnetic valve 109, the fuel cell hydrogen eliminator 110 can be directly connected to the test main pipeline 101 in a sealing way through a pipeline, pipelines at two ends connected with the fuel cell air hydrogen eliminator 110 are respectively provided with an upstream sampling port and a downstream sampling port, a pressure drop tester 111 is connected between the upstream sampling port and the downstream sampling port, the pressure drop tester 111 is used for detecting the pressure drop of the fuel cell hydrogen eliminator 110 at different wind speeds, wherein the upstream sampling port and the downstream sampling port are as close to an air inlet and an air outlet of the fuel cell hydrogen eliminator 110 as possible, so that the test of the pressure drop tester 111 is accurate and reliable;
the downstream piping of the above-mentioned fuel cell hydrogen eliminator 110 is provided with a hydrogen concentration detector 112. The hydrogen concentration detector 112 is used for detecting the concentration of hydrogen in the pipeline after dehydrogenation so as to judge whether the dehydrogenation performance of the dehydrogenation reactor 110 meets the requirement;
the gas tested by the hydrogen concentration detector 112 is discharged to the outdoor ambient air through the exhaust end of the main testing pipeline 101, and it should be noted that the exhaust end needs to be placed outdoors, extends to a high place through a pipeline, is far away from static electricity, fire source and the like, and cannot be placed in a closed environment such as indoors.
The following describes in detail a method for testing a fuel cell hydrogen generator according to the present invention with reference to fig. 2, with reference to the apparatus shown in fig. 1, the method comprising the following steps:
s201: after the air, the nitrogen and the hydrogen are stirred and mixed uniformly through a mixing bin, the mixture is conveyed to a main testing pipeline;
specifically, before air, nitrogen and hydrogen are stirred and mixed uniformly through a mixing bin, a fuel cell hydrogen eliminator 110 to be tested is required to be connected into a testing main pipeline 101 at first, sealing and leakage prevention are confirmed, an electromagnetic valve 109 and the mixing bin 102 are opened in sequence, air at an air inlet enters the testing main pipeline 101 after passing through an air filter 113, the air flow rate and pressure in the testing main pipeline 101 are kept stable, the gas flow in the testing main pipeline 101 is detected through a gas flowmeter 108, whether the air speed in the testing main pipeline 101 meets a rated air speed is confirmed, the gas pressure in the testing main pipeline 101 is detected through a pressure sensor 107, and whether a set pressure range is met is confirmed;
opening a bottle mouth valve of a nitrogen bottle 116, adjusting a gas flowmeter 118, decompressing nitrogen through a pressure regulating valve 117, entering a testing main pipeline 101, diluting air in a blending bin 102, fully blending the air through fan stirring, and detecting the oxygen concentration content through a downstream oxygen concentration detector 103, so that the oxygen concentration in the testing main pipeline 101 is kept in a set range, the oxygen concentration content in the tail exhaust of the fuel cell is simulated, and the testing is accurate and reliable;
the humidifier 114 and the heater 115 are turned on, the mixed gas of the air and the nitrogen entering the main testing pipeline 101 is humidified and heated, after the air speed of the gas in the main testing pipeline 101 is stable, the humidity sensor 105 at the downstream detects that the gas is humidified to a required humidity range, the temperature sensor 106 detects that the gas is heated to a required temperature range, the temperature and the humidity of the inlet air are kept in a stable value range, and the testing is accurate and reliable;
after the conditions are stable, opening a bottle mouth valve of the hydrogen bottle 119 to reduce the pressure of the high-pressure hydrogen to the required pressure through the pressure regulating valve 120, controlling the opening time and the opening interval time of the electromagnetic valve 121, wherein the opening time refers to the purging and hydrogen discharging duration of the fuel cell vehicle, generally about 200-300ms, the opening interval time is set according to the purging interval duration of the purging and hydrogen discharging of the fuel cell vehicle, and the opening and closing of the electromagnetic valve 121 completely simulates the purging duration and the interval duration of the tail hydrogen discharging of the fuel cell vehicle to control;
when passing through the gas flowmeter 122, the hydrogen enters the blending bin 102 to be fully blended with the air and the nitrogen, and then enters the testing main pipeline 101 at the downstream of the blending bin 102.
S202: measuring the hydrogen concentration before dehydrogenation by a hydrogen concentration detector at the upstream of the dehydrogenation unit;
in this step, a hydrogen concentration detector 104 on a downstream pipeline of the blending bin 102 detects whether the hydrogen concentration in the mixed gas output by the blending bin is stable within a set concentration range, generally 0.5% -1.5%, which is not higher than 2%;
s203: testing the pressure drop at two ends of the hydrogen eliminator by a pressure drop tester at two ends of the hydrogen eliminator, and measuring the hydrogen concentration after hydrogen elimination by a hydrogen concentration detector at the downstream of the hydrogen eliminator after the pressure drop requirement is met;
in this step, the pressure drop tester 111 at the two ends of the fuel cell hydrogen eliminator 110 is opened to test the pressure drop of the mixed gas passing through the fuel cell hydrogen eliminator 110 under the set humidity, temperature, wind speed and pressure, and test conditions and data are recorded to determine whether the fuel cell hydrogen eliminator 110 can meet the pressure drop requirement of the exhaust gas of the fuel cell system.
S204: calculating the dehydrogenation efficiency of the dehydrogenation device according to the hydrogen concentration before dehydrogenation and the hydrogen concentration after dehydrogenation;
in this step, the mixed gas after being mixed passes through the fuel cell hydrogen eliminator 110, after the hydrogen is eliminated, the concentration content of the mixed gas is detected by the downstream hydrogen concentration detector 112, and the downstream hydrogen concentration data is read and recorded in real time;
based on the data recorded by the upstream and downstream hydrogen concentration detectors 104, 112, the dehydrogenation efficiency of the fuel cell dehydrogenation reactor is calculated by the formula
Dehydrogenation efficiency (upstream concentration-downstream concentration)/upstream concentration 100%
The dehydrogenation effect of the fuel cell dehydrogenation device can be judged according to the calculated dehydrogenation efficiency, and whether the index requirement of the hydrogen concentration in the exhaust gas of the fuel cell system can be met or not can be met.
It is worth to say that, in the specific application of the present invention, the dehydrogenation efficiency is divided into two cases: one is normal dehydrogenation efficiency, and the other is purging dehydrogenation efficiency.
The normal dehydrogenation efficiency means that a hydrogen gas inlet is closed, namely the electromagnetic valve 121 is closed, no hydrogen gas is swept and enters the test main pipeline 101, the concentration of the hydrogen gas in the test main pipeline 101 is lower, about 0.5 percent or even lower, and the dehydrogenation efficiency of the dehydrogenation device under the low hydrogen concentration is tested;
the purging dehydrogenation efficiency means that the electromagnetic valve 121 is opened for 200-300 milliseconds, a large amount of hydrogen enters the test main pipeline 101 instantly at the moment of hydrogen purging, the concentration of the hydrogen in the test main pipeline 101 is higher, about 1.5 percent or even higher, and the dehydrogenation efficiency of the dehydrogenation device under high hydrogen concentration is tested;
the normal dehydrogenation efficiency and the purging dehydrogenation efficiency are two very important indexes for evaluating the dehydrogenation efficiency of the dehydrogenating device.
After the normal state hydrogen elimination efficiency and the purging hydrogen elimination efficiency are tested, the humidifier and the heater are closed, humidification and heating are not performed any more, and the rest of the humidifier and the heater are kept unchanged, so that the hydrogen elimination efficiency of the hydrogen eliminator when the fuel cell vehicle is just started is simulated and tested;
when the fuel cell vehicle is just started, the fuel cell stack does not reach a normal stable operation state, so that the temperature and the humidity of the purged tail gas are low, and the dehydrogenation efficiency of the dehydrogenation device during starting is continuously tested according to the method;
according to all the test results described above: the parameters of the hydrogen eliminator such as wind resistance pressure drop, normal state hydrogen elimination efficiency, purging hydrogen elimination efficiency, starting hydrogen elimination efficiency and the like can be used for integrally evaluating the hydrogen elimination performance of the fuel cell hydrogen eliminator.
It is worth to be noted that, in the above test, when the hydrogen concentration detector 104 detects that the hydrogen concentration in the upstream mixed gas exceeds 4%, the electromagnetic valve 121 is immediately closed, the fan in the blending bin 102 increases the air volume to purge the main testing pipeline 101, so as to dilute the hydrogen, thereby ensuring the safety of the test;
after all the tests are finished, the bottleneck valve, the electromagnetic valve 121 and the gas flowmeter 122 of the hydrogen cylinder 119 are closed, the bottleneck valve and the gas flowmeter 118 of the nitrogen cylinder 116 are closed, the humidifier 114, the heater 115 and the pressure drop tester 111 are closed, clean air is continuously introduced, the hydrogen concentration detector 104 is used for detecting that the hydrogen concentration in the test main pipeline 101 is lower than a safety line, the fan, the gas flowmeter 108 and the electromagnetic valve 109 of the blending bin 102 are closed, the fuel cell hydrogen eliminator 110 is taken out from the test main pipeline 101, and the test device is recovered.
In addition, in the above test apparatus, accurate measurement instruments such as the oxygen concentration detector 103, the hydrogen concentration detector 104, the gas flow meters 108, 118, and 122, and the pressure drop tester 111 need to be calibrated periodically to ensure that the test data is accurate and reliable;
the high-pressure hydrogen in the hydrogen cylinder 119 needs to meet the indexes in the hydrogen standard for fuel cell vehicles, the impurity content cannot exceed the standard, otherwise, the catalyst of the hydrogen eliminator is possibly poisoned, and the test of the hydrogen elimination efficiency is inaccurate;
in the main test pipeline 101, the air filter 113 at the air inlet needs to be replaced regularly to effectively filter harmful gases in the air, and thus, inaccurate test data caused by influence on the hydrogen eliminator to be tested is avoided.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A test apparatus for a fuel cell hydrogen suppressor, comprising:
the test main pipeline is provided with an air inlet end and an air outlet end at two ends, the air inlet end is used for conveying mixed gas required by the test, and the mixed gas consists of air, nitrogen and hydrogen;
the downstream pipeline of the air inlet end is provided with an oxygen concentration detector, a first hydrogen concentration detector, a humidity sensor, a temperature sensor, a pressure sensor and a first gas flowmeter;
the downstream pipeline of the first gas flowmeter is connected to a hydrogen eliminator, pipelines at two ends of the hydrogen eliminator are respectively provided with a sampling port, and a pressure drop tester is connected between the two sampling ports;
and a downstream pipeline of the dehydrogenation device is provided with a second hydrogen concentration detector for detecting the concentration of hydrogen in the pipeline after dehydrogenation.
2. The device of claim 1, further comprising a blending bin, wherein an air inlet of the blending bin is respectively connected with an air inlet, a hydrogen inlet and a nitrogen inlet through pipelines;
the mixing bin is internally provided with a fan which is used for stirring and mixing air, nitrogen and hydrogen and then conveying the air, nitrogen and hydrogen to the air inlet end of the main testing pipeline.
3. The device as claimed in claim 2, wherein the hydrogen inlet is connected to a hydrogen cylinder containing pure hydrogen gas, and the outlet of the hydrogen cylinder is provided with a first pressure regulating valve, a first electromagnetic valve and a second gas flow meter.
4. The apparatus of claim 2, wherein the nitrogen inlet is connected to a nitrogen cylinder containing pure nitrogen gas, and a second pressure regulating valve and a third gas flow meter are provided at an air outlet of the nitrogen cylinder.
5. The device of claim 2, wherein the air intake is provided with a filter.
6. The device according to any one of claims 2, 4 or 5, wherein a humidifier and a heater are further arranged on a pipeline between the air inlet, the hydrogen inlet and the blending bin, and are used for humidifying and heating the mixed gas of air and nitrogen.
7. The apparatus of claim 1, wherein a second solenoid valve is provided at a front end of the hydrogen eliminator.
8. The device of claim 2, wherein the main testing pipeline and the blending bin are made of stainless steel.
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| CN202021450804.9U CN212364208U (en) | 2020-07-21 | 2020-07-21 | Testing device of fuel cell hydrogen eliminator |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111830189A (en) * | 2020-07-21 | 2020-10-27 | 北京国鸿氢能科技有限公司 | Testing device and method for fuel cell hydrogen eliminator |
| CN116046432A (en) * | 2023-02-10 | 2023-05-02 | 四川晟蔚智能科技有限公司 | System and method for testing single-pass separation efficiency of hydrogen separation device |
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2020
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111830189A (en) * | 2020-07-21 | 2020-10-27 | 北京国鸿氢能科技有限公司 | Testing device and method for fuel cell hydrogen eliminator |
| CN116046432A (en) * | 2023-02-10 | 2023-05-02 | 四川晟蔚智能科技有限公司 | System and method for testing single-pass separation efficiency of hydrogen separation device |
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