CN115307248A - Tail exhaust back pressure discharge device for fuel cell small-scale test and use method thereof - Google Patents
Tail exhaust back pressure discharge device for fuel cell small-scale test and use method thereof Download PDFInfo
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- CN115307248A CN115307248A CN202210746024.6A CN202210746024A CN115307248A CN 115307248 A CN115307248 A CN 115307248A CN 202210746024 A CN202210746024 A CN 202210746024A CN 115307248 A CN115307248 A CN 115307248A
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- air inlet
- pipe
- buffer
- inlet pipe
- tail gas
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F7/00—Ventilation
- F24F7/04—Ventilation with ducting systems, e.g. by double walls; with natural circulation
- F24F7/06—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit
- F24F7/08—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit with separate ducts for supplied and exhausted air with provisions for reversal of the input and output systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/02—Ducting arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/22—Means for preventing condensation or evacuating condensate
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/378—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC] specially adapted for the type of battery or accumulator
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/06—Combination of fuel cells with means for production of reactants or for treatment of residues
- H01M8/0662—Treatment of gaseous reactants or gaseous residues, e.g. cleaning
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Abstract
The invention belongs to the technical field of fuel cell testing, and discloses a tail exhaust back pressure discharge device for small-sized testing of a fuel cell and a use method thereof. The method comprises the following steps that a fan is used for connecting an air inlet pipe and an air outlet pipe, wherein the inlet of the air inlet pipe is arranged indoors or outdoors, an inlet protective net is arranged at the air inlet of the air inlet pipe to prevent foreign matters from entering, the air inlet protective net is preferably arranged on the same floor of a test room outdoors, the outlet of the air outlet pipe is arranged at the high position of a building, and the fan is arranged at the outlet of the air outlet pipe at the high position of the building or between the air inlet pipe and the air outlet pipe in the test room; the hydrogen tail gas of the electric pile is buffered by the buffer, is mixed with outdoor ambient air introduced by the air inlet pipe and is discharged to the outside through the exhaust pipe. The parallel device and the using method are also provided, when the parallel device is used in parallel, the environmental backpressure interference caused by multiple operation can be effectively reduced, the device is simple in structure and low in manufacturing cost, and can save electric power and reduce noise.
Description
Technical Field
The invention belongs to the technical field of fuel cell testing, and relates to a tail exhaust back pressure discharge device for small-sized testing of a fuel cell and a use method thereof. In particular to a device and a method for solving the resistance and the water vapor condensation of tail gas generated by the test of a fuel cell in an exhaust path. The device also relates to a parallel device which can effectively reduce the environmental backpressure interference caused by the operation of a plurality of devices.
Background
In hydrogen power generation, fuel cells produce fuel tail gas, including anode fuel tail gas and cathode oxidant air tail gas, which is either untreated or treated and discharged to the ambient atmosphere. In fuel cell detection, hydrogen is discharged not through a fume hood of a conventional chemical laboratory but through a specially-established pipeline in many occasions. For such plumbing discharges, the resistance of the path can have an effect on stack operation. In particular, the indoor fuel cell is generally tested by being connected to a pipeline arranged in a building through a test bench management or a test bench and discharged to the top of a discharge building, and due to the long path, the discharge has certain resistance, and when the resistance is large, the resistance has influence on the operation of the electric pile, especially in the test of small-sized normal pressure operation. When the tail gases of a plurality of detection devices are connected to the same discharge pipeline in parallel, individual unsmooth exhaust or even gas return may occur due to different discharge pressures, so that the normal operation of an experiment is influenced, and a safety accident may be generated in a serious case.
In a specific experimental environment, induced air suction is adopted for tail gas, but power change and pulse discharge are mostly adopted for hydrogen tail gas, so that the flow of the tail gas is unstable, and particularly, under the condition that the galvanic pile is operated under the pressure of the environment, the phenomenon of air flow blockage or gas extraction in the galvanic pile is generated, the normal operation of the galvanic pile is interfered, and even the membrane electrode of the battery is damaged.
The operation temperature of the galvanic pile is higher, the tail gas contains water vapor, and the dew point of the water vapor may exceed 40-50 ℃ or even be higher according to specific operation conditions. Therefore, the problem of the formation of condensed water is common in the anode off-gas discharge line, and the outdoor line is liable to be frozen in winter to block the discharge pipe. If the water is dehydrated to below the freezing point and then discharged, the dew point needs to be lowered to below the freezing point, and the equipment is complex and the cost is high. And the problems of safety management and high energy consumption of electric heating measures in a hydrogen environment exist in the process of using electric heating for pipelines for antifreezing.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a tail exhaust back pressure discharge device for a fuel cell miniature test and a use method thereof, wherein a fan is used for connecting an air inlet pipe and an air exhaust pipe, the inlet of the air inlet pipe is arranged indoors or outdoors, an air inlet of the air inlet pipe is provided with an inlet protective net for preventing foreign matters from entering, the air inlet protective net is preferably arranged outside the same floor of a test room, the outlet of the air exhaust pipe is arranged at the high position of a building, and the fan is arranged at the outlet of the air exhaust pipe at the high position of the building or between the air inlet pipe and the air exhaust pipe in the test room; the air inlet pipe and the air outlet pipe are connected to form an air pipe, and tail exhaust gas is taken as a partition boundary towards an air pipe access opening; the hydrogen tail gas of the galvanic pile is buffered by a buffer, mixed and diluted with outdoor ambient air introduced by an air inlet pipe, and then discharged outdoors through an exhaust pipe. The parallel device and the using method are also provided, when the parallel device is used in parallel, the environmental backpressure interference caused by multiple operation can be effectively reduced, the device is simple in structure and low in manufacturing cost, and can save electric power and reduce noise.
The above purpose of the invention is realized by the following technical scheme:
a first object of the present invention is to protect a tail bleed back pressure drain for fuel cell miniature testing; the device comprises a building, an air inlet pipe, an exhaust pipe, a test board, a galvanic pile and a galvanic pile tail gas pipe; the test bench is arranged in a building, and the galvanic pile to be tested is placed on the test bench; the galvanic pile is connected with a galvanic pile tail gas pipe; the tail end of the pile tail gas pipe is connected with an air inlet pipe; the air inlet pipe is connected with the air exhaust pipe to form an air pipe, and tail exhaust gas is used as a boundary for dividing the air inlet pipe and the air exhaust pipe towards an air pipe access port; the exhaust pipe penetrates through the building roof of the building and is externally connected with an outdoor exhaust outlet; the exhaust pipe is provided with a fan; the air inlet pipe is arranged in the building or outside the building; the fan can be arranged in the building or outside the building;
the first mode of the device provided by the invention is as follows: when the fan is arranged in a building, a pipe orifice for tail gas to enter the air inlet pipe is arranged between the pile tail gas pipe and the air inlet pipe; the air inlet pipe is arranged in the building; and the fan is arranged between the air inlet pipe and the exhaust pipe.
The second mode of the present invention for providing the above apparatus is: when the fan is arranged outside a building and named as an outdoor fan, the opening of the air inlet pipe is arranged outside the building and the opening of the air inlet pipe is arranged downwards; the outdoor fan is arranged at the outdoor air outlet; a buffer is arranged between the pile tail gas pipe and the air inlet pipe, and the buffer is an expandable buffer; the expandable buffer is provided with a tail gas inlet connected with a tail gas pipe of the pile and a tail gas outlet for discharging tail gas to the air inlet pipe, and the lower end of the expandable buffer is provided with a mechanical automatic drain valve; draining the separated and collected water into a receiving container in the building room; the receiving container is not particularly limited and can be used for receiving water;
the third mode of the present invention for providing the above apparatus is: when the fan is arranged outside a building and named as an outdoor fan, the opening of the air inlet pipe is arranged outside the building and the opening of the air inlet pipe is arranged downwards; the outdoor fan is arranged at the outdoor air outlet; a buffer is arranged between the pile tail gas pipe and the air inlet pipe, and the buffer is an expandable buffer; a closed shell is arranged outside the expandable buffer; the expandable buffer is arranged in the closed shell, the closed shell is communicated with the air inlet pipe, and a pipe orifice through which tail gas enters the air inlet pipe is arranged at the communication position of the closed shell and the air inlet pipe; the expandable buffer is provided with a tail gas inlet connected with a tail gas pipe of the pile and a tail gas outlet for discharging tail gas to the air inlet pipe, and the lower end of the expandable buffer is provided with a mechanical automatic drain valve; draining the separated and collected water into a receiving container in the building room; the receiving container is not particularly limited and can be used for receiving water;
the fourth mode of the present invention for providing the above apparatus is: when the fan is arranged outside a building and is named as an outdoor fan, a buffer with fixed volume is arranged between the tail gas pipe and the air inlet pipe of the electric pile, and the buffer with fixed volume is preferably a vertical cylinder or a cube; the opening of the air inlet pipe is arranged outside the building and is arranged downwards; the outdoor fan is arranged at the outdoor air outlet; the buffer with the fixed volume is provided with a tail gas inlet, the tail gas inlet is positioned in the middle of the height of the buffer with the fixed volume, a baffling baffle is arranged in the buffer with the fixed volume and is over against the tail gas inlet, the area of the baffle is preferably 1/10 to 1/3 of the cross section area of the flow direction, and the space between the upper edge and the lower edge of the baffle and the inner wall of the buffer with the fixed volume is not closed; the upper part and the lower part of the opposite surface of the tail gas inlet of the buffer with fixed volume are respectively provided with a first connecting port and a second connecting port, the first connecting port is arranged at the tail end of the air inlet pipe, the second connecting port is arranged on the exhaust pipe, and the opening distance is preferably 0.2-2 m at the tail end of the air inlet pipe; the lower end of the buffer with fixed volume is provided with a water separator and a mechanical automatic drain valve, and the separated and collected water is discharged into a receiving container in the building room through the water separator and the water drainer; the receiving container is not particularly limited and can be used for receiving water;
the fifth mode of the present invention for providing the above apparatus is: when two test systems share one discharge device, the discharge device can be selected from any one of the modes 2-4; the test benches are used for the galvanic piles of the same model, and are respectively connected with the air inlet pipe through the galvanic pile tail air pipe; each pile tail gas pipe is provided with a branch discharge valve; the outdoor fan adopts a speed-regulating fan, and the outdoor fan and each branch discharge valve are respectively connected with the PLC system. The PLC system regulates and controls the rotating speed of the outdoor fan according to requirements or transmits an opening and closing signal according to requirements. To save energy and reduce unnecessary noise.
Further, the exhaust duct may be run through the building, through a roof, through an air duct, through a window, up an exterior wall, through a wall, up an exterior wall, etc.
Further, the air inlet of the air inlet pipe is provided with a grid to prevent foreign matters from entering.
Furthermore, the mechanical automatic drain valve does not limit the specific model, and the working function is realized.
The use method of the device comprises the following steps:
the method comprises the following steps that a fan is used for connecting an air inlet pipe and an air exhaust pipe, the inlet of the air inlet pipe is arranged indoors or outdoors, an inlet protective net is arranged at the air inlet of the air inlet pipe to prevent foreign matters from entering, the air inlet protective net is preferably arranged outside the same floor of a test room, the outlet of the air exhaust pipe is arranged at the high position of a building, and the fan is arranged at the outlet of the air exhaust pipe at the high position of the building or between the air inlet pipe and the air exhaust pipe in the test room; the hydrogen tail gas of the galvanic pile is buffered by the buffer, is mixed with outdoor ambient air introduced by the air inlet pipe and is discharged outdoors through the exhaust pipe.
The use method of the device provided by the third mode comprises the following steps: the inflatable buffer is preferably an air bag or a flexible corrugated pipe, when the pulse tail gas of the galvanic pile is released, the tail gas enters the inflatable buffer and expands the inflatable buffer under the action of release pressure, and the buffer slowly releases the collected tail gas to the air inlet pipe and gradually recovers the volume, so that hydrogen is continuously released to realize reduction of the peak value of hydrogen flow; the lower end of the expandable buffer is provided with a mechanical automatic drain valve which discharges the separated and collected water into a receiving container in the room; the closed casing is communicated with the air inlet pipe, the outer wall of the closed casing can be opened for inspecting the expandable buffer and maintaining the expandable buffer, and the closed casing has the advantages that when the expandable buffer is cracked and leaked, the tail gas hydrogen is still discharged into the air inlet pipe but not discharged into the indoor part of the test room, the outlet of the expandable buffer is connected to the air inlet pipe, and the tail gas hydrogen is mixed with the outdoor ambient air introduced by the air inlet pipe and is discharged to the outdoor through the air exhaust pipe under the action of an outdoor fan.
The use method of the device of the fourth mode provided above is as follows: the first and second ports allow a fixed volume damper to form parallel branches of the air inlet duct. When the outdoor fan operates, the air in the buffer with fixed volume is continuously replaced by the ambient air of the air inlet pipe. In operation, after the pulse hydrogen enters, the pulse hydrogen is blocked by the baffle in the buffer with the fixed volume and is diffused in the buffer with the fixed volume, and the original gas with a certain mixing degree in the buffer is replaced into the air inlet pipe, so that the slow release discharge of the hydrogen is realized.
The hydrogen tail gas of the galvanic pile is buffered by the buffer, is mixed with outdoor ambient air introduced by the air inlet pipe and is discharged outdoors through the exhaust pipe. The concentration of the hydrogen discharged to the outdoor is reduced to be below the explosion limit of the hydrogen by mixing with the ambient air introduced by the air inlet pipe, meanwhile, the concentration of the tail gas water vapor is reduced, the occurrence of pipeline condensation and outdoor pipeline freezing is reduced, particularly, when the outdoor is in the zero position, the introduced ambient air enters the indoor and is heated, and the carrying capacity of the water vapor is improved. The buffer is adopted to reduce the peak value of hydrogen formed by pulse, at this time, the discharge hydrogen speed is one tenth of the peak value discharge speed when the buffer is not adopted, for example, when the pulse period is 30s and the discharge time is 1s, the discharge peak value is about 30 times of the average value, the environment air for mixing required by the buffer is about 1/30 of the environment air without the buffer, and the required air quantity and the pipe diameter can be greatly reduced.
Compared with the prior art, the invention has the beneficial effects that:
1) The pulse peak value of tail gas emission can be effectively reduced, and the combustible gas is controlled to be below the explosion limit;
2) The proportion of tail gas water vapor is reduced by the mixed air, and the reduction of water vapor condensation in the exhaust pipeline is facilitated;
3) The method eliminates the discharged environmental backpressure interference on the operation of the fuel cell, and particularly avoids the test interference on the operation of the galvanic pile under the environmental pressure;
4) The device has simple structure and low cost, can save electric power and reduce noise, and has reliable system control.
Drawings
The invention is further illustrated with reference to the following figures and examples:
fig. 1 is a schematic view of a basic structure of a tail row processing system in embodiment 1.
FIG. 2 is a schematic view showing the basic structure of the tail gate processing system with the inflatable buffer in embodiment 2.
FIG. 3 is a schematic diagram showing the basic structure of the tail row processing system of the inflatable buffer with shield in embodiment 3.
FIG. 4 is a schematic diagram showing the basic structure of the tail gas processing system with a buffer of fixed volume in embodiment 4.
FIG. 5 is a diagram showing a method of managing a plurality of tests in example 5.
In the figure: 01. a building; 02. a galvanic pile; 021. a galvanic pile A; 022. a galvanic pile B; 03. a test bench; 031. a test bench A; 032. a test bench B; 04. a pile tail gas pipe; 041. a pile tail gas pipe A; 042. a pile tail gas pipe B; 05. an air inlet pipe; 06. tail gas enters the pipe orifice of the air inlet pipe; 061. tail gas enters a pipe orifice A of the air inlet pipe; 062. tail gas enters a pipe orifice B of the air inlet pipe; 07. a fan; 08. an exhaust duct; 09. building a roof; 10. an outdoor air outlet; 11. an inflatable bumper; 12. an outdoor fan; 13. a closed housing; 14. a fixed volume damper; 15. a baffle plate; 16. a first connection port; 17. a second connection port; 181. a branch discharge valve A; 182. and a branch discharge valve B.
Detailed Description
The invention is described in more detail below with reference to specific examples, without limiting the scope of the invention. Unless otherwise specified, the experimental methods adopted by the invention are all conventional methods, and experimental equipment, materials, reagents and the like used in the experimental method can be obtained from commercial sources. The test board related in the embodiment is a general test board available to those skilled in the art, and the test board is not limited to a specific model and can be used for testing the function of the electric pile; the mechanical automatic drain valve, the outdoor fan and the branch drain valve which are connected with the PLC system in the embodiment are not limited to a specific model, and the working function is realized.
Example 1
A tail exhaust back pressure discharge device for a small-sized test of a fuel cell is shown in figure 1 and comprises a building 01, an air inlet pipe 05, an exhaust pipe 08, a test bench 03, a galvanic pile 02 and a galvanic pile tail gas pipe 04; the test bench 03 is arranged in the building 01, and the electric pile 02 to be tested is placed on the test bench; the galvanic pile is connected with a galvanic pile tail gas pipe 04; the tail end of the electric pile tail gas pipe 04 is connected with an air inlet pipe 05; a pipe orifice 06 for tail gas to enter the air inlet pipe is arranged between the pile tail gas pipe 04 and the air inlet pipe 05; the air inlet pipe 05 is arranged in the building 01; the top of the air inlet pipe 05 is connected with an air exhaust pipe 08; a fan 07 is arranged between the air inlet pipe 05 and the air outlet pipe 08; the fan is arranged in the building 01; the exhaust pipe penetrates through the building roof 09 of the building and is externally connected with an outdoor exhaust outlet 10;
the specific using method of the device comprises the following steps: the indoor to-be-tested electric pile 02 of the building 01 is placed on the test bench 03, tail gas in operation is discharged into the air inlet pipe 05 through the tail gas pipe 04 of the electric pile at the pipe orifice 06 of the tail gas inlet pipe, the pipe orifice of the air inlet pipe 05 is arranged indoors, and the air inlet of the air inlet pipe is provided with a grid to prevent foreign matters from entering. The fan 07 delivers ambient air and exhaust gas together into the exhaust duct 08, through the building roof 09, and through the outdoor exhaust outlet 10. The exhaust duct 08 may extend through the building 01 in a manner that includes extending through a roof, through an air duct, through a window, up an exterior wall, through a wall, up an exterior wall, etc.
Example 2
A tail exhaust back pressure discharge device for a small-sized test of a fuel cell is shown in figure 2, and comprises a building 01, an air inlet pipe 05, an exhaust pipe 08, a test bench 03, a galvanic pile 02 and a galvanic pile tail gas pipe 04; the test bench 03 is arranged in the building 01, and the electric pile 02 to be tested is placed on the test bench; the galvanic pile is connected with a galvanic pile tail gas pipe 04; the tail end of the pile tail gas pipe 04 is connected with an air inlet pipe 05; a pipe opening 06 for tail gas to enter the air inlet pipe is arranged between the electric pile tail gas pipe 04 and the air inlet pipe 05; an expandable buffer 11 is arranged between the tail gas pipe 04 of the pile and a pipe orifice 06 of the tail gas inlet air inlet pipe; the opening of the air inlet pipe 05 is arranged outside the building 01 and downwards; the tail gas enters the joint of the pipe orifice 06 of the air inlet pipe and the air inlet pipe 05 and is connected with the exhaust pipe 08; the exhaust pipe penetrates through the building roof 09 of the building and is externally connected with an outdoor exhaust outlet 10; an outdoor fan 12 is arranged at the outdoor air outlet 10; the lower end of the expandable buffer 11 is provided with a mechanical automatic drain valve;
the specific use method of the device comprises the following steps: unlike embodiment 1, the air inlet pipe 05 has a downward opening and is disposed outdoors, and the air inlet thereof has a grill to prevent foreign matter from entering. An expandable buffer 11 is arranged between the tail gas pipe 04 of the galvanic pile and a pipe orifice 06 of the tail gas inlet air inlet pipe; the air and tail gas in the air inlet pipe 05 are discharged to the high place outside by the outdoor fan 12 after entering the pipe orifice 06 of the air inlet pipe. The expandable buffer 11 is preferably an air bag or a flexible corrugated pipe, when the pulse tail gas of the galvanic pile is released, under the action of release pressure, the tail gas enters the expandable buffer 11 and expands the buffer, enters the pipe orifice 06 of the air inlet pipe through the tail gas, the expandable buffer 11 slowly releases the collected tail gas in the air inlet pipe 05 and gradually recovers the volume of the expandable buffer 11, thereby continuously releasing hydrogen to realize reduction of the peak value of hydrogen flow, the tail gas is mixed with outdoor ambient air introduced by the air inlet pipe 05, and the mixture is discharged to the outdoor through the exhaust pipe 08 under the action of the outdoor fan 12. A mechanical automatic drain valve (not shown) is provided at the lower end of the inflatable buffer 11, and the separated and collected water is drained to a receiving container in the room of the building 01. The receiving container is not particularly limited and may be water-receiving.
After buffering and discharging, the hydrogen release speed is one tenth of the peak discharge speed when the buffer is not used, for example, when the pulse period is 30s and the discharge time is 1s, the discharge peak value is about 30 times of the average value, and the environment air for mixing required by buffering is about 1/30 of the environment air without buffering, so that the required air volume serving as dilution can be greatly reduced, and the pipe diameter and the fan power are correspondingly greatly reduced.
Example 3
A tail exhaust back pressure discharge device for a small-sized test of a fuel cell is shown in figure 3, and comprises a building 01, an air inlet pipe 05, an exhaust pipe 08, a test bench 03, a galvanic pile 02 and a galvanic pile tail gas pipe 04; the test bench 03 is arranged in the building 01, and the electric pile 02 to be tested is placed on the test bench; the galvanic pile is connected with a galvanic pile tail gas pipe 04; the tail end of the pile tail gas pipe 04 is connected with an air inlet pipe 05; an expandable buffer 11 is arranged between the electric pile tail gas pipe 04 and the air inlet pipe 05; the outside of the expandable buffer 11 is provided with a closed shell 13; the expandable buffer 11 is arranged in the closed shell 13, the closed shell 13 is communicated with the air inlet pipe 05, and a pipe orifice 06 for tail gas to enter the air inlet pipe is arranged at the communication position of the closed shell 13 and the air inlet pipe 05; the opening of the air inlet pipe 05 is arranged outside the building 01 and downwards; the joint of the pipe orifice 06 of the tail gas entering the air inlet pipe and the air inlet pipe 05 is connected with the exhaust pipe 08; the exhaust pipe penetrates through the building roof 09 of the building and is externally connected with an outdoor exhaust outlet 10; an outdoor fan 12 is arranged at the outdoor air outlet 10; the lower end of the expandable buffer 11 is provided with a mechanical automatic drain valve;
the specific use method of the device comprises the following steps: with respect to embodiment 2, a closed casing 13 is added to the expandable buffer 11, the expandable buffer 11 is placed in the closed casing 13, the closed casing 13 is communicated with the air inlet duct 05, the outer wall of the closed casing 13 is openable for inspection of the expandable buffer 11 and maintenance of the expandable buffer 11, and there is a feature that when a burst leak occurs in the expandable buffer 11, the exhaust hydrogen gas is still discharged into the air inlet duct 05 without being discharged into a test room. The outlet of the inflatable buffer 11 is mixed with the outdoor ambient air introduced by the air inlet pipe 05 and discharged to the outside of the building 01 through the air discharge pipe 08 by the outdoor fan 12. The rest is the same as example 2.
Example 4
As shown in fig. 4, the tail exhaust back pressure discharge device for the small-scale test of the fuel cell comprises a building 01, an air inlet pipe 05, an exhaust pipe 08, a test bench 03, a galvanic pile 02 and a galvanic pile tail gas pipe 04; the test bench 03 is arranged in the building 01, and the electric pile 02 to be tested is placed on the test bench; the galvanic pile is connected with a galvanic pile tail gas pipe 04; a buffer 14 with fixed volume is arranged between the tail gas pipe 04 of the electric pile and the air inlet pipe 05; a tail gas inlet connected with a pile tail gas pipe 04 is arranged at one side of the buffer 14 with fixed volume, a first connecting port 16 and a second connecting port 17 are respectively arranged at the upper part and the lower part of the other side of the buffer 14 with fixed volume, and a water separator and a mechanical automatic drain valve are arranged at the lower end of the buffer 14 with fixed volume; the tail gas inlet is positioned in the middle of the height of the buffer 14 with fixed volume; (ii) a The first connecting port 16 is connected with the pipeline of the air inlet pipe 05, and the first connecting port 16 is arranged at the tail end of the air inlet pipe 05; the second connecting port 17 is connected with an exhaust pipe 08, and the opening distance is preferably 0.2-2 m at the tail end of an air inlet pipe; a baffling baffle 15 is arranged in the buffer 14 with the fixed volume, the baffling baffle 15 is opposite to the inlet of the tail gas pipe 04, the area of the baffle 15 is preferably 1/10 to 1/3 of the cross section area of the flow direction, and the upper edge and the lower edge of the baffle 15 are not sealed with the upper edge and the lower edge of the inner wall of the buffer 14 with the fixed volume; the opening of the air inlet pipe 05 is arranged outside the building 01 and downwards; the air inlet pipe 05 is connected with the air outlet pipe 08 and is defined as a boundary by a second connecting port of the buffer 14 with fixed volume; the exhaust pipe penetrates through the building roof 09 of the building and is externally connected with an outdoor exhaust outlet 10; an outdoor fan 12 is arranged at the outdoor air outlet 10; the separated and collected water is discharged to a receiving container in the room of the building 01, and the receiving container is not particularly limited and may be used as long as water can be received.
The specific use method of the device comprises the following steps: the air inlet of the air inlet pipe 05 is provided with a grid to prevent foreign matters from entering. The first connection port 16 and the second connection port 17 form a parallel branch of the fixed volume damper 14 with the air inlet duct 05; when the outdoor fan 12 is operated, the air in the fixed volume damper 14 is continuously replaced with the ambient air in the intake duct 05. In operation, after the pulse hydrogen enters, the pulse hydrogen is blocked by the baffle 15 in the buffer 14 with the fixed volume and is diffused in the buffer 14 with the fixed volume, and the original gas with a certain mixing degree in the buffer is replaced into the air inlet pipe 05, so that the slow release discharge of the hydrogen is realized.
Example 5
A tail drain back pressure drain for a fuel cell miniature test, as shown in fig. 5, when two test systems share one drain, the drain can be selected from any one of embodiments 2-4; the test benches 03 used for the same type of the galvanic pile 02 are respectively connected with the air inlet pipe 05 through the galvanic pile tail air pipe 04; each electric pile tail gas pipe 04 is provided with a branch discharge valve; the outdoor fan 12 is a speed-regulating fan, and the outdoor fan 12 and each branch discharge valve are respectively connected with the PLC system. The PLC system regulates and controls the rotating speed of the outdoor fan 12 according to requirements or transmits an opening and closing signal according to requirements. To save energy and reduce unnecessary noise.
The embodiments described above are merely preferred embodiments of the invention, rather than all possible embodiments of the invention. Any obvious modifications thereof, which would occur to one skilled in the art without departing from the principles and spirit of the invention, are to be considered as included within the scope of the following claims.
Claims (9)
1. A tail exhaust back pressure discharge device for a small-sized test of a fuel cell is characterized by comprising a building (01), an air inlet pipe (05), an exhaust pipe (08), a test board (03), a galvanic pile (02) and a galvanic pile tail gas pipe (04); the test bench (03) is arranged in the building (01), and the galvanic pile (02) to be tested is placed on the test bench (03); the galvanic pile (02) is connected with a galvanic pile tail gas pipe (04); the tail end of the pile tail gas pipe (04) is connected with an air inlet pipe (05); the air inlet pipe (05) is connected with the air exhaust pipe (08) to form an air pipe, and tail exhaust gas is taken as a boundary for dividing the air inlet pipe (05) and the air exhaust pipe (08) to an air pipe inlet; the exhaust pipe (05) penetrates through the building roof (09) of the building (01) and is externally connected with an outdoor exhaust outlet (10); a fan (07) is arranged on the exhaust pipe (08); the air inlet pipe (08) is arranged in the building (01) or outside the building (01); the fan (07) can be arranged inside the building (01) or outside the building (01).
2. The back pressure discharge device for fuel cell miniature test as set forth in claim 1, wherein when the blower (07) is disposed in the building (01), a nozzle (06) for the tail gas to enter the air inlet pipe is disposed between the stack tail gas pipe (04) and the air inlet pipe (05); the air inlet pipe (05) is arranged in the building (01); and the fan (07) is arranged between the air inlet pipe (05) and the air outlet pipe (08).
3. The tail discharge back pressure discharge device for the fuel cell miniature test as set forth in claim 1, characterized in that when the fan (07) is disposed outside the building (01) and is named as the outdoor fan (12), the opening of the air inlet duct (05) is disposed outside the building (01) and the opening of the air inlet duct (05) is disposed downward; the outdoor fan (12) is arranged at the outdoor air outlet (10); a buffer is arranged between the pile tail gas pipe (04) and the air inlet pipe (05), and the buffer is an expandable buffer (11); the expandable buffer (11) is provided with a tail gas inlet connected with a pile tail gas pipe (04) and a tail gas outlet for discharging tail gas to an air inlet pipe (05), and the lower end of the expandable buffer (11) is provided with a mechanical automatic drain valve; draining the separated and collected water into a receiving container in the room of the building (01); the receiving container is not particularly limited, and may be water-receiving.
4. The tail discharge back pressure discharge device for the fuel cell miniature test as set forth in claim 1, characterized in that when the fan (07) is disposed outside the building (01) and is named as the outdoor fan (12), the opening of the air inlet duct (05) is disposed outside the building (01) and the opening of the air inlet duct (05) is disposed downward; the outdoor fan (12) is arranged at the outdoor air outlet (10); a buffer is arranged between the pile tail gas pipe (04) and the air inlet pipe (05), and the buffer is an expandable buffer (11); a closed shell (13) is arranged outside the expandable buffer (11); the expandable buffer (11) is arranged in the closed shell (13), the closed shell (13) is communicated with the air inlet pipe (05), and a pipe orifice (06) for tail gas to enter the air inlet pipe is arranged at the communication part of the closed shell (13) and the air inlet pipe (05); the expandable buffer (11) is provided with a tail gas inlet connected with a pile tail gas pipe (04) and a tail gas outlet for discharging tail gas to an air inlet pipe (05), and the lower end of the expandable buffer (11) is provided with a mechanical automatic drain valve; draining the separated and collected water into a receiving container in the room of the building (01); the receiving container is not particularly limited and may be water-receiving.
5. The exhaust back pressure discharge device for fuel cell mini test as claimed in claim 1, wherein when the fan (07) is located outside the building (01) and named outdoor fan (12), a buffer (14) of fixed volume is provided between the stack tail gas pipe (04) and the air inlet pipe (05), the buffer (14) of fixed volume is preferably a vertical cylinder or cube; the opening of the air inlet pipe (05) is arranged outside the building (01) and the opening of the air inlet pipe (05) is arranged downwards; the outdoor fan (12) is arranged at the outdoor air outlet (10); the buffer (14) with the fixed volume is provided with a tail gas inlet, the tail gas inlet is positioned in the middle of the height of the buffer (14) with the fixed volume, a baffling baffle (15) is arranged in the buffer (14) with the tail gas inlet facing the fixed volume, the area of the baffle (15) is preferably 1/10 to 1/3 of the cross section area of the flow direction, and the space between the upper edge and the lower edge of the baffle (15) and the inner wall of the buffer (14) with the fixed volume is not closed; the upper part and the lower part of the opposite surface of the tail gas inlet of the buffer (14) with fixed volume are respectively provided with a first connecting port (16) and a second connecting port (17), the first connecting port (16) is arranged at the tail end of the air inlet pipe (05), the second connecting port (17) is arranged on the exhaust pipe (08), and the opening distance is preferably 0.2-2 m at the tail end of the air inlet pipe (05); the lower end of the buffer (14) with fixed volume is provided with a water separator and a mechanical automatic drain valve, and the separated and collected water is discharged into a receiving container in the room of the building (01) through the water separator and the water drainer; the receiving container is not particularly limited and may be water-receiving.
6. The back pressure discharge device of the tail discharge for the fuel cell miniature test as set forth in any one of claims 3-5, characterized in that when two test systems share one discharge device for the test stations (03) of the same type of the electric pile, each test station (03) is connected with the air inlet pipe (05) through the tail air pipe (04) of the electric pile; each pile tail gas pipe (04) is provided with a branch discharge valve; the outdoor fan (12) adopts a speed-regulating fan, and the outdoor fan (12) and each branch discharge valve are respectively connected with the PLC system.
7. The use method of the tail discharge back pressure discharge device for the fuel cell small-scale test is characterized in that a fan (07) is used to connect an air inlet pipe (05) and an air outlet pipe (08), the inlet of the air inlet pipe (05) is indoor or outdoor, the air inlet of the air inlet pipe (05) is provided with an inlet protective net to prevent foreign matters from entering, the air inlet protective net is preferably arranged outside the same floor of a test room, the outlet of the air outlet pipe (08) is arranged at the high position of a building (01), and the fan (07) is arranged between the outlet of the air outlet pipe (08) at the high position of the building (01) or the air inlet pipe (05) and the air outlet pipe (08) in the test room; the hydrogen tail gas of the galvanic pile (02) is buffered by a buffer, is mixed with outdoor ambient air introduced by an air inlet pipe (05), and is discharged to the outside through an exhaust pipe (08).
8. The use method of the exhaust back pressure discharge device for fuel cell small scale test as claimed in claim 4, wherein the expandable buffer (11) is preferably an air bag, a flexible bellows, when the stack (02) pulse exhaust release, under the release pressure, the exhaust enters the expandable buffer (11) and expands the expandable buffer (11), the expandable buffer (11) slowly releases the collected exhaust to the air inlet pipe (05) and gradually recovers the volume, thereby continuously releasing hydrogen to reduce the peak value of hydrogen flow; the lower end of the expandable buffer (11) is provided with a mechanical automatic drain valve which discharges the precipitated and collected water into a receiving container in a room; the closed casing (13) is communicated with the air inlet duct (05) and has an outer wall that is openable for inspection of the inflatable buffer (11) and maintenance of the inflatable buffer (11), and has a structure in which, when the inflatable buffer (11) is ruptured and leaked, the exhaust gas hydrogen is still discharged into the air inlet duct (05) without being discharged into an indoor portion of the test room where an outlet of the inflatable buffer (11) is connected to the air inlet duct (05), mixed with the outdoor ambient air introduced through the air inlet duct (05), and discharged to the outside through the air discharge duct (08) by an outdoor fan (12).
9. The use of the back pressure discharge device for fuel cell miniature test as set forth in claim 5, characterized in that the first connection port (16) and the second connection port (17) form parallel branches of the air inlet duct (05) with the fixed volume damper (14); when the outdoor fan (12) runs, the air in the buffer (14) with fixed volume is continuously replaced by the ambient air of the air inlet pipe (05); in operation, after the pulse hydrogen enters, the pulse hydrogen is blocked by the baffle (15) in the buffer (14) with the fixed volume and diffuses in the buffer (14) with the fixed volume, and the original gas with a certain mixing degree in the buffer is replaced into the air inlet pipe (05), so that the slow release discharge of the hydrogen is realized.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210746024.6A CN115307248A (en) | 2022-06-29 | 2022-06-29 | Tail exhaust back pressure discharge device for fuel cell small-scale test and use method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210746024.6A CN115307248A (en) | 2022-06-29 | 2022-06-29 | Tail exhaust back pressure discharge device for fuel cell small-scale test and use method thereof |
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| CN202210746024.6A Pending CN115307248A (en) | 2022-06-29 | 2022-06-29 | Tail exhaust back pressure discharge device for fuel cell small-scale test and use method thereof |
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Cited By (1)
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| CN116598549A (en) * | 2023-05-22 | 2023-08-15 | 北京亿华通科技股份有限公司 | Tail row control device for multi-fuel cell system |
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