CN218765843U - Hydrogen leakage detection system - Google Patents
Hydrogen leakage detection system Download PDFInfo
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- CN218765843U CN218765843U CN202223065389.7U CN202223065389U CN218765843U CN 218765843 U CN218765843 U CN 218765843U CN 202223065389 U CN202223065389 U CN 202223065389U CN 218765843 U CN218765843 U CN 218765843U
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Abstract
The utility model discloses a hydrogen leakage detection system relates to the technical field of hydrogen energy, include: a catalyst carrier having a hydrogen combustion catalyst attached thereto; a temperature sensor in contact with the catalyst support to detect a temperature of the catalyst support; and the single chip microcomputer is connected with the temperature sensor circuit. The utility model discloses utilize hydrogen combustion catalyst to meet hydrogen meeting catalytic combustion reaction, temperature sensor and singlechip only need measure the temperature value of catalyst carrier, can judge hydrogen leakage situation, and sensitivity is high. The hydrogen combustion catalyst in the catalyst carrier can eliminate hydrogen and radically stop the leakage of hydrogen, thereby eliminating the potential safety hazard of hydrogen and achieving the technical effects of detecting hydrogen and eliminating hydrogen.
Description
Technical Field
The utility model relates to a technical field of hydrogen energy, concretely relates to hydrogen leak testing system.
Background
The hydrogen energy is a green energy source which has wide sources, cleanness, no carbon, high heat value and rich application scenes. Hydrogen has a hydrogen embrittlement problem, which is also called hydrogen induced cracking or hydrogen damage, and is a phenomenon of material mechanical property reduction, plasticity reduction, cracking or damage caused by hydrogen in metal.
The hydrogen embrittlement phenomenon is caused by that hydrogen atoms have small radius and easily enter into crystal lattice gaps of metal and perform diffusion movement, so that after the atoms are recombined at a material defect position or react with other substances to form gaseous molecules, the volume rapidly expands to cause cracks at the position, and a hydrogen system is easy to leak hydrogen. The explosion limit of hydrogen is 4.0-75.6% (volume concentration), and if the volume concentration of hydrogen in the air is 4.0-75.6%, the hydrogen can explode when meeting a fire source, which is a potential safety hazard.
At present, usually, use the hydrogen sensor to detect the concentration value of hydrogen, at the airtight space top installation hydrogen sensor with hydrogen, detect whether hydrogen concentration is in the safety range, and when the hydrogen sensor detected hydrogen concentration and in the explosion limit within range, many hydrogen explosion accidents had taken place, consequently can only play the early warning effect, can not eliminate hydrogen potential safety hazard.
For example, in a hydrogen fuel cell stack, hydrogen gas does not completely react in the hydrogen fuel cell stack, so that the tail gas of the hydrogen fuel cell stack contains a small amount of hydrogen gas, but the hydrogen gas is continuously accumulated in a certain space, so that the hydrogen gas reaches an explosion limit range, and the safety of the hydrogen fuel cell stack is reduced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a hydrogen leak testing system solves the technical problem that hydrogen leak testing and hydrogen eliminated to fundamentally solve the problem of hydrogen safety.
In order to achieve the above purpose, the utility model provides a following technical scheme: the method comprises the following steps:
a catalyst carrier having a hydrogen combustion catalyst attached thereto;
a temperature sensor in contact with the catalyst support to detect a temperature of the catalyst support;
and the single chip microcomputer is connected with the temperature sensor circuit.
By adopting the technical scheme, if hydrogen leaks, when the hydrogen flows through the catalyst carrier, the hydrogen and the oxygen can be subjected to flameless catalytic combustion on the hydrogen combustion catalyst, so that heat is released, and the temperature of the catalyst carrier is increased. The catalyst carrier is arranged at the tail gas outlet of the hydrogen fuel electric pile, and a small amount of hydrogen in the tail gas can be basically eliminated by utilizing the hydrogen combustion catalyst, so that the requirement of safe emission is met. Meanwhile, the temperature sensor collects the temperature value on the catalyst carrier, whether hydrogen leaks or not is judged by using the temperature difference, the collected temperature value is transmitted to the single chip microcomputer, data analysis and calculation are carried out by using the single chip microcomputer, and whether hydrogen leaks or not and the leakage amount are detected.
Preferably, the catalyst carrier is a first catalyst carrier which is cylindrical, a plurality of airflow channels are vertically formed in the first catalyst carrier, and hydrogen combustion catalysts are attached to the airflow channels.
By adopting the technical scheme, when hydrogen flows through the plurality of gas flow channels, water and heat are generated under the catalytic reaction of the hydrogen and the oxygen on the hydrogen combustion catalyst, the hydrogen is eliminated, the temperature of the first catalyst carrier is increased, and the temperature of the first catalyst carrier is used as the index of hydrogen leakage.
Preferably, the catalyst carrier is a second catalyst carrier which is in a disc-shaped net structure, and a hydrogen combustion catalyst is attached to the outer wall of the second catalyst carrier.
Through adopting above-mentioned technical scheme, only need detect hydrogen and leak, need not eliminate under the application scene of hydrogen, catalyst carrier two adopts disc type network structure, and the hydrogen leaks the back, and during disc type network structure, hydrogen and oxygen take place catalytic reaction under on the hydrogen combustion catalyst, release heat, through the difference in temperature change that detects disc type network structure, can confirm whether hydrogen leaks.
Preferably, the system also comprises a speed regulation fan, and the speed regulation fan is connected with the single chip microcomputer circuit.
Through adopting above-mentioned technical scheme, when temperature sensor, singlechip detected hydrogen and leaked, singlechip control speed governing fan opened, and the speed governing fan blows the air to the hydrogen leakage point, sweeps the hydrogen of leaking, avoids hydrogen concentration after the gathering to reach explosion limit scope.
Preferably, the temperature sensor comprises a thermocouple temperature measuring line and an operational amplifier, the thermocouple temperature measuring line is connected with the operational amplifier through a circuit, and the operational amplifier is connected with the single chip microcomputer through a circuit.
By adopting the technical scheme, the temperature sensing point of the thermocouple temperature measuring line is contacted with the catalyst carrier, the temperature difference change signal of the catalyst carrier is collected and is amplified by the operational amplifier and then is transmitted to the single chip microcomputer, and the single chip microcomputer judges whether hydrogen is leaked or not according to the temperature difference of the catalyst carrier.
Preferably, the temperature sensor comprises a thermal resistor, a fixed resistor and an acquisition line, the thermal resistor is connected with a fixed resistor circuit, one end of the acquisition line is connected with a circuit between the thermal resistor and the fixed resistor, and the other end of the acquisition line is connected with the singlechip.
By adopting the technical scheme, when the temperature of the catalyst carrier rises, the resistance of the thermal resistor is reduced, the voltage of the circuit rises, the voltage signal on the circuit is collected by the collecting wire and is sent to the single chip microcomputer, and the single chip microcomputer judges whether hydrogen leaks or not through the voltage signal.
Compared with the prior art, the utility model provides a hydrogen leakage detection system has following beneficial effect:
1. the utility model discloses utilize hydrogen combustion catalyst to meet hydrogen meeting catalytic combustion reaction, temperature sensor and singlechip only need measure the temperature value of catalyst carrier, can judge hydrogen leakage situation, and sensitivity is high.
2. The hydrogen combustion catalyst in the catalyst carrier can eliminate hydrogen and radically stop the leakage of hydrogen, thereby eliminating the potential safety hazard of hydrogen, and realizing the technical effects of detecting hydrogen and eliminating hydrogen.
Drawings
FIG. 1 is a schematic structural diagram of a hydrogen leak detection system according to a first embodiment;
FIG. 2 is a schematic structural view of a catalyst carrier according to the first embodiment;
FIG. 3 is a schematic structural diagram of a hydrogen leak detection system according to a second embodiment;
fig. 4 is a plan view of the catalyst carrier of example two.
Reference numerals are as follows: 1. a single chip microcomputer; 2. a first catalyst carrier; 21. an air flow channel; 3. a second catalyst carrier; 31. a circular outer frame; 32. a circular metal mesh; 4. a thermocouple temperature measuring line; 5. an operational amplifier; 6. a thermal resistor; 7. fixing a resistor; 8. collecting a line; 9. a housing; 91. an intermediate; 92. a truncated cone; 93. an interface; 10. a box body; 11. a speed-regulating fan; 12. an alarm.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and embodiments.
It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention
Furthermore, it should be noted that in the description of the present invention, the terms "mounted," "disposed," and "connected" are to be construed broadly unless otherwise explicitly stated or limited. For example, it may be a fixed connection, a detachable connection or an integral connection; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Example one
Referring to fig. 1 and 2, a hydrogen leakage detection system according to an embodiment of the present invention includes: the device comprises a catalyst carrier I2, a temperature sensor and a singlechip 1, wherein the catalyst carrier I2 is a cordierite catalyst carrier or a stainless steel catalyst carrier, the catalyst carrier I2 is in a cylindrical shape, a plurality of airflow channels 21 are vertically arranged in the catalyst carrier I2, a hydrogen combustion catalyst is coated in the airflow channels 21, and the hydrogen combustion catalyst is Al 2 O 3 The ball is loaded with 1% of metal catalyst particles by mass fraction; al (Al) 2 O 3 The ball is a ball star structure made of alumina serving as a substrate, and platinum elements with the mass fraction of 1% are mixed to promote hydrogen to perform catalytic combustion.
The temperature sensor is in contact with the catalyst carrier I2 and is used for detecting the temperature of the catalyst carrier I2. When hydrogen leaks, the hydrogen and the oxygen pass through a plurality of airflow channels 21, and the hydrogen combusts without flames to release heat under the catalytic reaction of the hydrogen combustion catalyst, so that the temperature of the catalyst carrier I2 is increased.
Singlechip 1 and temperature sensor circuit connection, temperature sensor send singlechip 1 with the temperature signal of catalyst carrier 2 who gathers, and singlechip 1 carries out data analysis and calculation to temperature signal, judges whether hydrogen leaks and leaks the quantity. The single chip microcomputer 1 is connected with a power supply, and the power supply is used for supplying power to the single chip microcomputer 1.
Further, the temperature sensor comprises a thermocouple temperature measuring line 4 and an operational amplifier 5, the thermocouple temperature measuring line 4 is in circuit connection with the operational amplifier 5, and the operational amplifier 5 is in circuit connection with the single chip microcomputer 1. The temperature sensing point of the thermocouple temperature measuring line 4 is in surface contact with the first catalyst carrier 2, the temperature difference change signal of the first catalyst carrier 2 is acquired, the operational amplifier 5 is a circuit unit with a high amplification factor, the operational amplifier 5 amplifies the temperature difference change signal and then transmits the amplified temperature difference change signal to the single chip microcomputer 1, and the single chip microcomputer 1 judges whether hydrogen leaks or not through the temperature difference of the first catalyst carrier 2.
Also, the catalyst carrier one 2 is usually placed at a place where there is a risk of hydrogen leakage, and when hydrogen gas leaks, it can flow quickly to the catalyst carrier one 2. The outer portion of the first catalyst carrier 2 is provided with a shell 9, two ends of the shell 9 are both provided with openings, the single chip microcomputer 1 is arranged in a box body 10, the box body 10 can be arranged outside the shell 9, and heat insulation treatment needs to be carried out between the box body 10 and the shell 9.
The shell 9 comprises a middle body 91, a truncated cone 92 and a connector 93, wherein the middle body 91 and the connector 93 are hollow cylinders, a first catalyst carrier 2 is placed in the middle body 91, and the connector 93 is connected with a hydrogen outlet pipeline to be eliminated. The upper port of the truncated cone 92 is welded with the lower port of the intermediate body 91, the lower port of the truncated cone 92 is welded with the upper port of the intermediate body 91, and the intermediate body 91, the truncated cone 92 and the connector 93 are communicated with each other.
When the hydrogen of hydrogen fuel galvanic pile tail gas is required to be detected and eliminated, the tail gas outlet of the hydrogen fuel galvanic pile is communicated with the interface 93 outside the catalyst carrier I2, the tail gas of the hydrogen fuel galvanic pile flows through a plurality of airflow channels 21 of the catalyst carrier I2, the tail gas also contains a large amount of air, the hydrogen and the oxygen in the air are subjected to catalytic combustion in the airflow channels 21 to release heat, so that the temperature of the catalyst carrier I2 is increased, the temperature sensor detects the temperature signal of the catalyst carrier I2 and sends the temperature signal to the single chip microcomputer 1, the single chip microcomputer 1 judges the hydrogen leakage condition according to the temperature difference signal, the hydrogen leakage can be detected, the leaked hydrogen can be eliminated, and the potential safety hazard of the hydrogen is eliminated.
Example two
Referring to fig. 3 and 4, a hydrogen leakage detecting system according to an embodiment of the present invention only detects hydrogen leakage without removing hydrogen, and includes: the catalyst carrier II 3 is of a disc-shaped net structure and comprises a circular outer frame 31 and a circular metal net 32, the circular metal net 32 is fixed in the circular outer frame 31, and the circular metal net 32 is coated with a hydrogen combustion catalyst.
The temperature sensor is in contact with the second catalyst carrier 3 and comprises a thermal resistor 6, a fixed resistor 7 and an acquisition line 8, the thermal resistor 6 is in circuit connection with the fixed resistor 7, one end of the acquisition line 8 is connected with a circuit between the thermal resistor 6 and the fixed resistor 7, and the other end of the acquisition line 8 is connected with the singlechip 1. When the temperature of the catalyst carrier II 3 rises, the resistance of the thermal resistor 6 is reduced, the voltage of the circuit rises, the collecting line 8 collects a voltage signal on the circuit and sends the voltage signal to the singlechip 1, and the singlechip 1 judges whether hydrogen leaks or not according to the voltage signal.
In order to avoid that hydrogen gathering reaches hydrogen explosion limit range, adopt speed governing fan 11 to blow away the hydrogen and the air of hydrogen leakage point department, speed governing fan 11 and singlechip 1 circuit connection, speed governing fan 11 is the normal close state, when singlechip 1 detects there is hydrogen to leak, control speed governing fan 11 and open, blow away hydrogen, reduce local hydrogen concentration, eliminate hydrogen potential safety hazard.
Further, the hydrogen leakage alarm device further comprises an alarm 12, wherein the alarm 12 is in circuit connection with the single chip microcomputer 1, and when the single chip microcomputer 1 detects hydrogen leakage, an alarm signal is sent out through the alarm 12.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A hydrogen leak detection system, comprising:
a catalyst carrier having a hydrogen combustion catalyst attached thereto;
a temperature sensor in contact with the catalyst support to detect a temperature of the catalyst support;
the temperature sensor comprises a single chip microcomputer (1), and the single chip microcomputer (1) is connected with the temperature sensor circuit.
2. The hydrogen leakage detection system according to claim 1, wherein the catalyst carrier is a first catalyst carrier (2), the first catalyst carrier (2) is cylindrical, a plurality of gas flow channels (21) are vertically formed in the first catalyst carrier (2), and a hydrogen combustion catalyst is attached to the plurality of gas flow channels (21).
3. The hydrogen leakage detection system according to claim 1, wherein the catalyst carrier is a second catalyst carrier (3), the second catalyst carrier (3) is a disk-shaped mesh structure, and a hydrogen combustion catalyst is attached to an outer wall of the second catalyst carrier (3).
4. The hydrogen leakage detection system according to claim 3, further comprising a speed-adjustable fan (11), wherein the speed-adjustable fan (11) is in circuit connection with the single chip microcomputer (1).
5. The hydrogen leak detection system according to claim 1, wherein the temperature sensor includes a thermocouple temperature measurement line (4) and an operational amplifier (5), the thermocouple temperature measurement line (4) is electrically connected to the operational amplifier (5), and the operational amplifier (5) is electrically connected to the single chip microcomputer (1).
6. The hydrogen leakage detection system according to claim 1, wherein the temperature sensor comprises a thermal resistor (6), a fixed resistor (7) and an acquisition line (8), the thermal resistor (6) is electrically connected with the fixed resistor (7), one end of the acquisition line (8) is connected with a circuit between the thermal resistor (6) and the fixed resistor (7), and the other end of the acquisition line (8) is connected with the singlechip (1).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223065389.7U CN218765843U (en) | 2022-11-18 | 2022-11-18 | Hydrogen leakage detection system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223065389.7U CN218765843U (en) | 2022-11-18 | 2022-11-18 | Hydrogen leakage detection system |
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| CN218765843U true CN218765843U (en) | 2023-03-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117167673A (en) * | 2023-11-03 | 2023-12-05 | 南通东来冶金装备有限公司 | Detection device for combustible gas leakage |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117167673A (en) * | 2023-11-03 | 2023-12-05 | 南通东来冶金装备有限公司 | Detection device for combustible gas leakage |
| CN117167673B (en) * | 2023-11-03 | 2023-12-26 | 南通东来冶金装备有限公司 | Detection device for combustible gas leakage |
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