CN108758355B - Hydrogen leakage monitoring and protecting device and method for hydrogen energy power generation device - Google Patents
Hydrogen leakage monitoring and protecting device and method for hydrogen energy power generation device Download PDFInfo
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- CN108758355B CN108758355B CN201810480253.1A CN201810480253A CN108758355B CN 108758355 B CN108758355 B CN 108758355B CN 201810480253 A CN201810480253 A CN 201810480253A CN 108758355 B CN108758355 B CN 108758355B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/02—Preventing, monitoring, or locating loss
- F17D5/06—Preventing, monitoring, or locating loss using electric or acoustic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
Abstract
The application relates to the technical field of hydrogen leakage monitoring and protection, in particular to a hydrogen leakage monitoring and protection device and method for a hydrogen energy power generation device. The hydrogen leakage monitoring and protecting device and the method for the hydrogen energy power generation device are characterized in that an air exhaust cover is arranged right above each valve of the hydrogen energy power generation device to collect hydrogen leaked by each valve; collecting the collected hydrogen into a local pipeline through a preset number of branch pipelines, monitoring the hydrogen concentration by using a hydrogen concentration tester and an audible and visual alarm device arranged in the local pipeline, and giving an alarm when the hydrogen concentration exceeds a standard; and an electromagnetic valve is arranged at the communication part of the local pipeline and the main pipeline, the opening and closing of the electromagnetic valve is controlled according to the hydrogen concentration in the local pipeline and the standard exceeding condition, and finally the hydrogen is discharged into the air through the main pipeline. The hydrogen leakage monitoring device and method for the hydrogen energy power generation device are simple and practical, high in sensitivity and capable of effectively preventing accidents such as fire disasters and explosions caused by excessive hydrogen concentration.
Description
Technical Field
The application relates to the technical field of hydrogen leakage monitoring and protection, in particular to a hydrogen leakage monitoring and protection device and method for a hydrogen energy power generation device.
Background
Hydrogen energy is used for generating electricity, namely hydrogen and oxygen are combusted to form a hydrogen-oxygen generator set. The rocket-type internal combustion engine is structurally matched with a generator, does not need a complex steam boiler system, has simple structure, convenient maintenance and quick start, and can be started when required and stopped when required. When the power grid is in low load, the surplus electricity can be absorbed to electrolyze water to produce hydrogen and oxygen for power generation at peak time. Therefore, a power generation method of hydrogen energy power generation has been widely used.
Since hydrogen is used in power generation, conventional hydrogen power generation equipment monitors leakage of hydrogen. Hydrogen power generation equipment all places usually in indoor or semi-enclosed space, and traditional hydrogen leakage monitoring devices are mainly at indoor several hydrogen concentration monitoring sensors of arranging, monitor the hydrogen that leaks to the indoor air, and the concentration of hydrogen in the air exceeds standard, utilizes the alarm to send out the police dispatch newspaper.
However, when the conventional hydrogen leakage monitoring device is used for monitoring the hydrogen leakage condition, because the hydrogen concentration monitoring sensor is directly placed indoors, the sensitivity is low, when the alarm gives an alarm, the concentration of hydrogen in indoor air is often seriously exceeded, the excessive hydrogen cannot be treated in time, and even accidents such as explosion, fire and the like can be caused in serious cases.
Disclosure of Invention
The application provides a hydrogen leakage monitoring and protecting device and method for a hydrogen energy power generation device, and aims to solve the problems that the traditional hydrogen leakage monitoring device and method are low in sensitivity, and the hydrogen concentration seriously exceeds the standard during alarming.
A hydrogen leakage monitoring and protecting device of a hydrogen energy power generation device comprises an air extraction cover, branch pipelines, a local pipeline, a hydrogen concentration tester, an electromagnetic valve and a main pipeline;
the air extraction cover is arranged right above each valve of the hydrogen energy power generation device;
one end of each branch pipeline is communicated with the air extraction cover, and the other ends of each preset number of branch pipelines are communicated with each other and gathered into a local air outlet end;
one end of the local pipeline is communicated with the local air outlet end, and the other ends of all the local pipelines are communicated with one end of the main pipeline; the hydrogen concentration tester is arranged on the inner wall of each local pipeline, and the electromagnetic valve is arranged at the other end of each local pipeline;
the other end of the main pipeline is in an open form and is communicated with the air.
Optionally, a power supply and a fan are arranged in the air exhaust cover, and the power supply is electrically connected with the fan.
Optionally, an audible and visual alarm device is arranged on the hydrogen concentration tester.
Optionally, the hydrogen leakage monitoring and protecting device for the hydrogen energy power generation device further comprises a control circuit, wherein the control circuit is arranged on the outer wall of the pipeline at the communication position of the main pipeline and all the local pipelines.
Optionally, the control circuit is electrically connected with the hydrogen concentration tester, the electromagnetic valve and the power supply.
Optionally, the distance between the air extraction cover and the valve of the hydrogen energy power generation device is 80-120 mm.
A hydrogen leakage monitoring and protecting method for a hydrogen energy power generation device comprises the following steps:
an air extraction cover is arranged right above each valve of the hydrogen energy power generation device, so that hydrogen leaked by each valve is collected;
the hydrogen of each valve is stored in the branch pipeline by communicating the air exhaust cover with the branch pipeline;
then communicating each preset number of branch pipelines with local pipelines to collect hydrogen in the branch pipelines into the local pipelines;
detecting the hydrogen concentration in each local pipeline by using a hydrogen concentration tester arranged in each local pipeline, and judging whether the hydrogen concentration in each local pipeline exceeds a limit value or not;
determining whether each local pipeline is communicated with a main pipeline according to a judgment result of whether the hydrogen concentration in each local pipeline exceeds a limit value;
the communicated local pipeline and the main pipeline collect hydrogen in the local pipeline into the main pipeline and finally discharge the hydrogen into the air.
Optionally, the determining whether each local pipeline is communicated with the main pipeline according to the judgment result of whether the hydrogen concentration in each local pipeline exceeds the limit value includes:
if the hydrogen concentration in all the local pipelines is below a limit value, an electromagnetic valve arranged between each local pipeline and a main pipeline is in an open state, and all the local pipelines are communicated with the main pipeline;
if the hydrogen concentration in two or more than two local pipelines reaches or exceeds a limit value, starting a control circuit to sequentially close the electromagnetic valves between all the local pipelines and the main pipeline for 5-10min from small to large according to the hydrogen concentration, and then opening the electromagnetic valves to communicate the local pipelines with the main pipeline.
Optionally, the limit value of the hydrogen concentration is set to be in a range of 0.1% to 3.5% by volume concentration.
The technical scheme provided by the application comprises the following beneficial technical effects:
according to the hydrogen leakage monitoring and protecting device and method for the hydrogen energy power generation device, the air exhaust cover is arranged right above each valve of the hydrogen energy power generation device, and hydrogen leaked from the valves is actively collected; the branch pipeline is communicated with the air exhaust cover, and hydrogen can be stored in the branch pipeline; the preset number of branch pipelines are communicated to collect hydrogen in the local pipeline, the hydrogen concentration tester arranged in the local pipeline can monitor the hydrogen concentration, and when the hydrogen concentration exceeds a limit value, the sound-light alarm device arranged on the hydrogen concentration tester can give out sound-light alarm; if the hydrogen concentration in two or more local pipelines exceeds the standard, the control circuit is started to control the electromagnetic valves positioned at the end parts of the local pipelines to be closed for 5-10min from small to large according to the hydrogen concentration, so that the hydrogen entering the main pipeline from the local pipelines through the opened electromagnetic valves is reduced, and the hydrogen concentration of the air exhausted through the main pipeline is not too high. The application provides a hydrogen energy power generation facility hydrogen leakage monitoring protector and method, sensitivity is high, and sustainable monitoring hydrogen concentration is unlikely too high with regard to controllable hydrogen concentration in the pipeline, effectively adjusts the concentration of the hydrogen of discharging into the air, can effectively prevent accidents such as conflagration, explosion that hydrogen concentration exceeds standard and arouse.
Drawings
In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a hydrogen leakage monitoring and protecting device of a hydrogen energy power generation device according to an embodiment of the present application.
Fig. 2 is a schematic structural diagram of the suction hood provided in the embodiment of the present application.
Fig. 3 is a flowchart of a hydrogen leakage monitoring and protecting method for a hydrogen energy power generation device according to an embodiment of the present application.
Description of reference numerals: 1. an air extraction hood; 2. dividing pipelines; 3. a local pipeline; 4. a hydrogen concentration tester; 5. an electromagnetic valve; 6. a main conduit; 7. a local air outlet end; 8. a control circuit; 101. a power source; 102. a fan; 401. audible and visual alarm device.
Detailed Description
Referring to fig. 1, a structure of a hydrogen leakage monitoring and protecting device for a hydrogen power generation device according to an embodiment of the present application is shown.
The hydrogen leakage monitoring and protecting device for the hydrogen energy power generation device comprises an air extraction cover 1, branch pipelines 2, local pipelines 3, a hydrogen concentration tester 4, an electromagnetic valve 5 and a main pipeline 6;
the air extraction cover 1 is arranged right above each valve of the hydrogen energy power generation device;
one end of each branch pipeline 2 is communicated with the air extraction cover 1, and the other ends of each preset number of branch pipelines 2 are communicated with each other and are gathered into a local air outlet end 7;
one end of the local pipeline 3 is communicated with the local air outlet end 7, and the other ends of all the local pipelines 3 are communicated with one end of the main pipeline 6; the hydrogen concentration tester 4 is arranged on the inner wall of each local pipeline 3, and the electromagnetic valve 5 is arranged at the other end of each local pipeline 3;
the other end of the main pipeline 6 is in an open form and is communicated with the air.
Traditional hydrogen leakage monitoring devices all are at indoor installation hydrogen concentration tester and alarm, and when the hydrogen concentration in the indoor air exceeds standard, the alarm just can report an alarm. The method has low sensitivity, and can prompt when the hydrogen in the air exceeds the standard, at the moment, the hydrogen seriously exceeds the standard and cannot be subjected to subsequent treatment measures, so that accidents such as fire, explosion and the like are easily caused, and great potential safety hazards exist.
Compared with the traditional hydrogen leakage monitoring device, the device collects the leaked hydrogen in the pipeline, and compared with the leaked hydrogen in the air, the volume fraction of the same mass of hydrogen in the narrow pipeline is far larger than that in the air, namely, the concentration of the same mass of hydrogen in the pipeline is far larger than that in the air. Thus, when we monitor that the hydrogen concentration in the pipeline is over standard, the hydrogen concentration in the air is far below the limit of the hydrogen concentration, and then the hydrogen which is shown to be over standard in the pipeline is released into the indoor air, and the hydrogen is in a safe range.
Specifically, this application embodiment has all set up extraction hood 1 to every valve department of hydrogen energy power generation facility, and its reason is that valve department is the position of easily leaking hydrogen in the device, and this application embodiment has all set up extraction hood 1 directly over every valve, can accomplish to monitor comprehensively the condition that every valve leaked hydrogen.
Each extraction hood 1 is provided with a branch pipeline 2 connected with the extraction hood, and hydrogen collected by the extraction hood 1 is stored in the branch pipeline 2. Every preset number of branch pipelines 2 are communicated with each other, three, four, five or even more branch pipelines 2 can be communicated with each other, the specific number can be reasonably set according to the number of valves of the hydrogen power generation device, and the embodiment of the application is not limited.
The connected branch pipes 2 have a common hydrogen outlet, namely a local gas outlet end 7, and hydrogen discharged from the local gas outlet end 7 enters the local pipe 3. All the hydrogen in the local pipes 3 will eventually collect in the main pipe 6 and enter the room air through the main pipe.
Before the hydrogen in the local pipeline 3 is converged into the main pipeline 6, the hydrogen concentration in the local pipeline 3 can be monitored by the hydrogen concentration tester 4, and whether the hydrogen concentration in the local pipeline 3 exceeds the standard or not is judged. And opening and closing the electromagnetic valve 5 positioned at the end part of the local pipeline according to the monitoring condition of the hydrogen concentration tester, wherein the electromagnetic valve 5 controls the communication condition of the local pipeline 3 and the main pipeline 6.
Specifically, if the hydrogen concentration in all the local pipelines 3 is below a limit value, the electromagnetic valve is opened, all the local pipelines 3 are communicated with the main pipeline 6, and the hydrogen in all the local pipelines 3 is sent into the main pipeline 6 and finally enters the air; if the hydrogen concentration in two or more local pipelines 3 exceeds the standard, the electromagnetic valves 5 at the end parts of all the local pipelines 3 are closed for 5-10min from small to large according to the hydrogen concentration condition in all the local pipelines 3, and then the electromagnetic valves 5 are opened successively to communicate the local pipelines 3 with the main pipeline 6. As for whether the electromagnetic valve 5 is closed for 5min, 7min or 9min and other time periods within the range, the closing time period may be determined according to the specific situations of the exceeding of the concentration and the hydrogen concentration in each local pipeline 3, and the embodiment of the present application is not limited.
In the embodiment of the present application, when the hydrogen concentration in two or more local pipelines 3 exceeds the standard, the electromagnetic valve 5 is controlled to be closed for a period of time and then opened according to the hydrogen concentration from small to large. Because the embodiment of the application monitors the hydrogen concentration in the pipeline, compared with the direct monitoring in the air, the monitored concentration is larger, so if the hydrogen concentration in a local pipeline 3 exceeds the standard, the hydrogen concentration is still in a safe range after being discharged into the air, and no influence is generated. Therefore, the embodiment of the application controls the communication between the local pipeline 3 and the main pipeline 6 according to the excessive hydrogen concentration in two or more local pipelines 3.
When the hydrogen concentration in two or more local pipelines 3 exceeds the standard, the electromagnetic valve 5 is controlled to be closed for a period of time from small to large according to the hydrogen concentration, and the reason is twofold. On one hand, the electromagnetic valve 5 is closed for a period of time in sequence, so that the local pipeline 3 and the main pipeline 6 are not communicated for a period of time, hydrogen entering the main pipeline 6 from the local pipeline 3 is reduced, the total amount of hydrogen entering air from the main pipeline 6 is naturally reduced, and the concentration of hydrogen in the air can be ensured to be absolutely within a safe range; on the other hand, the local pipeline 3 with low hydrogen concentration is closed preferentially, so that the hydrogen concentration accumulated in the local pipeline 3 is not too high, the hydrogen concentration in the local pipeline 3 exceeds the standard, and the electromagnetic valve 5 is closed from low to high according to the concentration, so that the hydrogen concentration in all the local pipelines 3 can be ensured to be in a safe range. Thus, it is ensured that the concentration of hydrogen in the discharged air is within a safe range, and that the concentration of hydrogen in the local pipe 3 is within a safe range.
Optionally, a power source 101 and a fan 102 are disposed in the air extraction hood 1, and the power source 101 and the fan 102 are electrically connected.
In the embodiment of the application, the collection of the leaked hydrogen is actively collected instead of naturally collected, so that the collection speed of the hydrogen can be increased, and the leaked hydrogen is ensured to be completely collected into the extraction hood 1 as far as possible. Therefore, as shown in fig. 2, a power supply 101 and a fan 102 are arranged in the extraction hood 1, the power supply 101 supplies electric energy to the fan 102, and drives a motor in the fan 102 to rotate the fan 102, so that the collection of hydrogen can be accelerated, the collection rate of hydrogen is higher, and the collection is more complete.
Optionally, an audible and visual alarm device 401 is arranged on the hydrogen concentration tester 4.
Referring to fig. 1, when the hydrogen concentration tester 4 monitors that the hydrogen concentration in the local pipeline 3 exceeds a limit value, the audible and visual alarm device 401 arranged on the hydrogen concentration tester 4 gives an audible and visual alarm. The branch pipeline 2, the local pipeline 3 and the main pipeline 6 used in the embodiment of the application are made of transparent plastics, namely, when the sound-light alarm device 401 gives an alarm, the sound can be heard, the light which is transmitted through the transparent plastics can be sensed, the alarm is given out from the sound and the light, the closing action response of the follow-up electromagnetic valve 5 can be faster, and the condition can be found by the working personnel more timely.
Optionally, the hydrogen leakage monitoring and protecting device for the hydrogen energy power generation device further comprises a control circuit 8, and the control circuit 8 is arranged on the outer wall of the pipeline at the communication position of the main pipeline 6 and all the local pipelines 3.
Specifically, a trigger circuit and a timing circuit are provided in the control circuit 8. A comparison circuit is arranged in the hydrogen concentration tester 4, the concentration of the hydrogen in the local pipeline 3 can be compared with a hydrogen concentration limit value, and when the concentration of the hydrogen in the local pipeline 3 exceeds the limit value, the audible and visual alarm device 401 is started to alarm; at this time, the trigger circuit in the control circuit responds to control the electromagnetic valve 5 which is originally in the open state to be closed according to the concentration in all the local pipelines 3 from small to large, further, the timing circuit controls the closing time of the electromagnetic valve 5, and after the closing time is enough, the electromagnetic valve 5 is opened again to communicate the local pipelines 3 with the main pipeline 6.
Since the control circuit 8 controls the opening and closing of the solenoid valves 5 at the ends of all the local conduits 3, which in turn is determined according to the hydrogen concentration in the local conduits 3, the control circuit 8 is associated with each local conduit 3. And the main pipe 6 generally sets up the middle part position in the set of all local pipelines 3, so, this application embodiment sets up control circuit 8 on the lower extreme pipeline outer wall of main pipe 6 and all local pipelines 3 intercommunication departments, sets up like this and makes overall arrangement more reasonable, avoids control circuit 8 and the local pipeline 3 between the circuit overlength near the tip, has the potential safety hazard, phenomena such as easy appearance opens circuit.
Optionally, the control circuit 8 is electrically connected to the hydrogen concentration tester 4, the electromagnetic valve 5, and the power supply 101.
As mentioned above, the control circuit 8 must control the opening and closing of the electromagnetic valve 5 according to the hydrogen concentration condition in the local pipeline 3, and therefore, the control circuit 8 must be electrically connected with the hydrogen concentration tester 4 and the electromagnetic valve 5; at the same time, the control circuit 8 controls the rotation of the fan 102 by supplying power to the power source 101 in the suction hood 1, so that the control circuit 8 is also electrically connected to the power source 101.
Optionally, the distance between the air extraction cover 1 and the valve of the hydrogen energy power generation device is 80-120 mm.
The distance between the extraction hood 1 and the valve of the hydrogen energy power generation device is required to ensure that leaked hydrogen is completely collected as much as possible, and simultaneously, the extraction hood 1 and the fan 102 arranged inside the extraction hood 1 are prevented from being too tight from the valve, so that the valve can be influenced or damaged, and unnecessary potential safety hazards are avoided. Therefore, the distance set in the embodiments of the present application is 80 to 120mm, and may be 85mm, 100mm, 115mm, etc., as long as it is within this range, and is not particularly limited.
The embodiment of the application provides a hydrogen leakage monitoring and protecting method for a hydrogen energy power generation device, which comprises the following steps:
an air extraction cover 1 is arranged right above each valve of the hydrogen energy power generation device, so that hydrogen leaked by each valve is collected;
the hydrogen of each valve is stored in the branch pipeline 2 by communicating the air exhaust cover 1 with the branch pipeline 2;
then, communicating each preset number of branch pipelines 2 with a local pipeline 3, so that hydrogen in the branch pipelines 2 is collected in the local pipeline 3;
detecting the hydrogen concentration in each local pipeline 3 by using a hydrogen concentration tester 4 arranged in each local pipeline 3, and judging whether the hydrogen concentration in each local pipeline 3 exceeds a limit value;
determining whether each local pipeline 3 is communicated with a main pipeline 6 according to the judgment result of whether the hydrogen concentration in each local pipeline 3 exceeds a limit value;
the partial pipe 3 and the main pipe 6, which are communicated, collect hydrogen gas in the partial pipe 3 into the main pipe 6, and finally discharge the hydrogen gas into the air.
Referring to fig. 3, a flow chart of a method for monitoring and protecting hydrogen leakage of a hydrogen power generation device according to an embodiment of the present application is shown.
The hydrogen leakage monitoring and protecting method for the hydrogen energy power generation device is specific to the hydrogen leakage monitoring and protecting device for the hydrogen energy power generation device.
According to the hydrogen leakage monitoring and protecting device for the hydrogen energy power generation device, the method in the embodiment of the application collects the hydrogen leaked from each valve of the hydrogen energy power generation device, stores the collected hydrogen in the branch pipelines 2, and then collects the hydrogen in the branch pipelines 2 in a preset number into the local pipeline 3; monitoring the hydrogen concentration in the local pipelines 3, and determining the communication condition of each local pipeline 3 and the main pipeline 6 according to the condition whether the hydrogen concentration in each local pipeline 3 exceeds a limit value; eventually, the hydrogen in the local pipes 3 will be collected in the main pipe 6, and the main pipe 6 will discharge the hydrogen into the indoor air.
The method collects the leaked hydrogen in the pipeline and monitors the hydrogen concentration, compared with the method of directly monitoring in the air, the volume concentration of the hydrogen with the same mass fraction in the pipeline is far greater than that in the air, namely, even if the hydrogen concentration in the pipeline seriously exceeds the standard, the hydrogen concentration in the air is absolutely in a safe range under the same condition. Compared with the conventional hydrogen leakage monitoring method, the method provided by the embodiment of the application has the advantages that the sensitivity is higher, the limitation on the hydrogen concentration is tighter, the processing effect is better, and the safety is higher.
Optionally, the determining whether each of the local pipelines 3 is communicated with the main pipeline 6 according to the judgment result of whether the hydrogen concentration in each of the local pipelines 3 exceeds the limit value includes:
if the hydrogen concentration in all the local pipelines 3 is below a limit value, an electromagnetic valve 5 arranged between each local pipeline 3 and a main pipeline 6 is in an open state, and all the local pipelines 3 and the main pipeline 6 are communicated;
if the hydrogen concentration in two or more local pipelines 3 reaches or exceeds a limit value, the control circuit 8 is started to close the electromagnetic valves 5 between all the local pipelines 3 and the main pipeline 6 for 5-10min from small to large according to the hydrogen concentration, and then the electromagnetic valves 5 are opened to communicate the local pipelines 3 with the main pipeline 6.
According to the hydrogen leakage monitoring and protecting device of the hydrogen energy power generation device, the local pipeline 3 and the main pipeline 6 are controlled to be communicated according to the fact whether the hydrogen concentration in each local pipeline 3 exceeds the standard or not and the concentration.
Specifically, if the hydrogen concentration in all the local pipelines 3 does not exceed the standard, the electromagnetic valves 5 at the end parts of all the local pipelines are opened, all the local pipelines 3 are communicated with the main pipeline 6, and all the hydrogen in all the local pipelines 3 is discharged into the air through the main pipeline 6; if the hydrogen concentration in two or more local pipelines 3 exceeds the standard, the electromagnetic valves 5 are closed for 5-10min from small to large according to the hydrogen concentration in all the local pipelines 3, and then the electromagnetic valves 5 are opened in sequence to communicate the local pipelines 3 with the main pipeline 6. Therefore, the concentration of hydrogen entering the air through the main pipeline 6 is ensured to be within a safe range, the excessive concentration of the hydrogen in the local pipeline 3 is avoided, and the safety of the whole device is ensured.
Optionally, the limit value of the hydrogen concentration is set to be in a range of 0.1% to 3.5% by volume concentration.
The ignition of hydrogen in air can cause explosion, and the explosion limit of the hydrogen in the air is achieved when the volume concentration of the hydrogen in the air is 4.1% -74.2%, namely, the explosion can occur when the volume concentration of the hydrogen is 4.1% -74.2%. Therefore, the limiting value of the hydrogen concentration is set to 0.1% to 3.5% by volume concentration in the examples, specifically, it may be 0.1%, 1%, 2.2%, 2.8%, 3.4%, etc., and the examples are not particularly limited.
If the hydrogen concentration in the local pipeline 3 exceeds the limit value set in the embodiment of the application, the hydrogen concentration tester 4 triggers the audible and visual alarm device 401 to alarm when monitoring that the hydrogen concentration exceeds the standard. At this time, the hydrogen concentration in the local pipeline 3 is outside the hydrogen explosion limit range, and is safe; in addition, the subsequent treatment of the method provided by the embodiment of the application can reduce the concentration of the hydrogen discharged into the air, ensure that the concentration of the hydrogen in the air is always in a safe range, and eliminate potential safety hazards.
According to the hydrogen leakage monitoring and protecting device and method for the hydrogen energy power generation device, the air exhaust cover is arranged right above each valve of the hydrogen energy power generation device, and hydrogen leaked from the valves is actively collected; the branch pipeline is communicated with the air exhaust cover, and hydrogen can be stored in the branch pipeline; the preset number of branch pipelines are communicated to collect hydrogen in the local pipeline, the hydrogen concentration tester arranged in the local pipeline can monitor the hydrogen concentration, and when the hydrogen concentration exceeds a limit value, the sound-light alarm device arranged on the hydrogen concentration tester can give out sound-light alarm; if the hydrogen concentration in two or more local pipelines exceeds the standard, the control circuit is started to control the electromagnetic valves positioned at the end parts of the local pipelines to be closed for 5-10min from small to large according to the hydrogen concentration, so that the hydrogen entering the main pipeline from the local pipelines through the opened electromagnetic valves is reduced, and the hydrogen concentration of the air exhausted through the main pipeline is not too high. The application provides a hydrogen energy power generation facility hydrogen leakage monitoring protector and method, sensitivity is high, and sustainable monitoring hydrogen concentration is unlikely too high with regard to controllable hydrogen concentration in the pipeline, effectively adjusts the concentration of the hydrogen of discharging into the air, can effectively prevent accidents such as conflagration, explosion that hydrogen concentration exceeds standard and arouse.
It is to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an 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. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
It should be understood that the present application is not limited to what has been described above and shown in the accompanying drawings, and that various modifications and changes can be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.
Claims (8)
1. A hydrogen leakage monitoring and protecting device of a hydrogen energy power generation device is characterized by comprising an air extraction cover (1), branch pipelines (2), a local pipeline (3), a hydrogen concentration tester (4), an electromagnetic valve (5) and a main pipeline (6);
the air extraction cover (1) is arranged right above each valve of the hydrogen energy power generation device;
one end of each branch pipeline (2) is communicated with the air extraction cover (1), and the other ends of each preset number of branch pipelines (2) are communicated with each other and are gathered into a local air outlet end (7);
one end of the local pipeline (3) is communicated with the local air outlet end (7), and the other ends of all the local pipelines (3) are communicated with one end of the main pipeline (6); the hydrogen concentration tester (4) is arranged on the inner wall of each local pipeline (3), and the electromagnetic valve (5) is arranged at the other end of each local pipeline (3);
the other end of the main pipeline (6) is in an open form and is communicated with the air;
the hydrogen energy power generation device hydrogen leakage monitoring and protecting device further comprises a control circuit (8), wherein the control circuit (8) is arranged on the outer wall of the pipeline at the communication position of the main pipeline (6) and all the local pipelines (3).
2. The hydrogen leakage monitoring and protecting device for the hydrogen energy power generation device according to claim 1, characterized in that a power supply (101) and a fan (102) are arranged in the air extraction hood (1), and the power supply (101) is electrically connected with the fan (102).
3. The hydrogen leakage monitoring and protecting device for the hydrogen energy power generation device according to claim 1, wherein an audible and visual alarm device (401) is arranged on the hydrogen concentration tester (4).
4. The hydrogen leakage monitoring and protecting device for the hydrogen energy power generation device according to claim 2, wherein the control circuit (8) is electrically connected with the hydrogen concentration tester (4), the electromagnetic valve (5) and the power supply (101).
5. The hydrogen leakage monitoring and protecting device for the hydrogen energy power generation device according to claim 1, wherein the distance between the air extraction cover (1) and the valve of the hydrogen energy power generation device is 80-120 mm.
6. A hydrogen leakage monitoring and protecting method for a hydrogen energy power generation device is characterized by comprising the following steps:
an air extraction cover (1) is arranged right above each valve of the hydrogen energy power generation device, so that hydrogen leaked by each valve is collected;
the hydrogen of each valve is stored in the branch pipeline (2) by communicating the air extraction cover (1) with the branch pipeline (2);
then, communicating each preset number of branch pipelines (2) with a local pipeline (3) to collect hydrogen in the branch pipelines (2) into the local pipeline (3);
detecting the hydrogen concentration in each local pipeline (3) by using a hydrogen concentration tester (4) arranged in each local pipeline (3), and judging whether the hydrogen concentration in each local pipeline (3) exceeds a limit value or not;
determining whether each local pipeline (3) is communicated with a main pipeline (6) according to the judgment result of whether the hydrogen concentration in each local pipeline (3) exceeds a limit value;
the communicated local pipeline (3) and the main pipeline (6) collect hydrogen in the local pipeline (3) into the main pipeline (6) and finally discharge the hydrogen into the air.
7. The hydrogen leakage monitoring and protecting method for a hydrogen energy power generation device according to claim 6, wherein the determining whether each of the local pipes (3) is communicated with the main pipe (6) according to the judgment result of whether the hydrogen concentration in each of the local pipes (3) exceeds a limit value comprises:
if the hydrogen concentration in all the local pipelines (3) is below a limit value, an electromagnetic valve (5) arranged between each local pipeline (3) and a main pipeline (6) is in an open state, and all the local pipelines (3) are communicated with the main pipeline (6);
if the hydrogen concentration in two or more than two local pipelines (3) reaches or exceeds a limit value, starting a control circuit (8) to close the electromagnetic valves (5) between all the local pipelines (3) and the main pipeline (6) for 5-10min from small to large according to the hydrogen concentration, and then opening the electromagnetic valves (5) to communicate the local pipelines (3) with the main pipeline (6).
8. The hydrogen leakage monitoring and protecting method for a hydrogen energy power generation device according to claim 6, wherein the limit value of the hydrogen concentration is set within a range of 0.1% to 3.5% by volume concentration.
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| EP4279392A1 (en) * | 2022-05-20 | 2023-11-22 | Airbus Operations GmbH | Hydrogen accumulation control system for monitoring and controlling leaked hydrogen within an interior space |
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| CN201194230Y (en) * | 2008-05-15 | 2009-02-11 | 黄晋伟 | Solar battery apparatus capable of automatic folding and cleaning |
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| CN103161989A (en) * | 2011-12-17 | 2013-06-19 | 西安艾贝尔科技发展有限公司 | System capable of cutting off gas automatically |
| CN204153471U (en) * | 2014-09-09 | 2015-02-11 | 青岛厚科信息工程有限公司 | A kind of combustion gas lateral Leak testtion and emergent treatment system |
| CN204204161U (en) * | 2014-09-11 | 2015-03-11 | 国网山东省电力公司青岛供电公司 | A kind of leakage gas-detecting device |
| CN104546449A (en) * | 2015-01-21 | 2015-04-29 | 齐鲁工业大学 | Moxa burning smoke collection device |
| CN205785703U (en) * | 2016-05-25 | 2016-12-07 | 合肥佳智自动化科技有限公司 | A kind of method of cumulative scale leak detection system |
| CN206530881U (en) * | 2017-02-15 | 2017-09-29 | 中国电力工程顾问集团中南电力设计院有限公司 | Hydrogen supply pipe leakage and the structure of reduction explosion danger in a kind of detection main building |
| CN107098083B (en) * | 2017-04-19 | 2019-03-26 | 山东海益化工科技有限公司 | A kind of chlorine storage tank anti-leak monitoring system |
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