CN112490474B - Gas humidifying device of fuel cell system - Google Patents
Gas humidifying device of fuel cell system Download PDFInfo
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- CN112490474B CN112490474B CN202011348440.8A CN202011348440A CN112490474B CN 112490474 B CN112490474 B CN 112490474B CN 202011348440 A CN202011348440 A CN 202011348440A CN 112490474 B CN112490474 B CN 112490474B
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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
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
- H01M8/04089—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
- H01M8/04119—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with simultaneous supply or evacuation of electrolyte; Humidifying or dehumidifying
- H01M8/04126—Humidifying
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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
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04007—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
- H01M8/04014—Heat exchange using gaseous fluids; Heat exchange by combustion of reactants
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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
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04007—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
- H01M8/04067—Heat exchange or temperature measuring elements, thermal insulation, e.g. heat pipes, heat pumps, fins
- H01M8/04074—Heat exchange unit structures specially adapted for fuel cell
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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
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04694—Processes for controlling fuel cells or fuel cell systems characterised by variables to be controlled
- H01M8/04701—Temperature
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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
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04694—Processes for controlling fuel cells or fuel cell systems characterised by variables to be controlled
- H01M8/04701—Temperature
- H01M8/04708—Temperature of fuel cell reactants
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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
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04694—Processes for controlling fuel cells or fuel cell systems characterised by variables to be controlled
- H01M8/04701—Temperature
- H01M8/04731—Temperature of other components of a fuel cell or fuel cell stacks
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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
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04694—Processes for controlling fuel cells or fuel cell systems characterised by variables to be controlled
- H01M8/04701—Temperature
- H01M8/04738—Temperature of auxiliary devices, e.g. reformer, compressor, burner
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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
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04694—Processes for controlling fuel cells or fuel cell systems characterised by variables to be controlled
- H01M8/04828—Humidity; Water content
- H01M8/04835—Humidity; Water content of fuel cell reactants
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
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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 discloses a gas humidifying device and a humidifying method of a fuel cell system, and the gas humidifying device and the humidifying method comprise a humidifying box, a gas uniform distribution device, an ultrasonic humidifying device, a flow mixing device, a heating device and a water-vapor separation device, wherein the humidifying box is a box body with a hollow interior, the gas uniform distribution device, the ultrasonic humidifying device, the flow mixing device, the heating device and the water-vapor separation device are sequentially arranged in the humidifying box from the bottom to the top, and a first gas inlet, a second gas inlet, a third gas inlet, a water inlet and a gas outlet are respectively arranged on the humidifying box. The humidifying device has the advantages that the humidifying device is simple in structure and process and low in cost, can be suitable for different application sites, can flexibly switch working modes, controls the air output of the air outlet to meet the humidifying requirements of fuel cells with different powers, controls the temperature of humidified gas through the heating device, and prevents moisture contained in the humidified gas from damaging the fuel cells through the water-vapor separation device.
Description
Technical Field
The invention relates to the technical field of fuel cells, in particular to a gas humidifying device and a humidifying method of a fuel cell system.
Background
The fuel cell is an energy conversion device with zero pollution emission, high conversion efficiency and low noise. Its main components include: membrane electrode, bipolar plate, current collector, end plate, wherein the membrane electrode is its core component. The proton exchange membrane can exert the maximum ion conduction effect under the wet state, and simultaneously, the overall performance and the service life of the galvanic pile are improved. Therefore, a gas humidifying device must be added into the test system, and the humidifying method mainly comprises the following steps: bubbling, spraying, membrane permeation, and the like. Firstly, the principle of bubbling humidification is to disperse gas into a bubbling water tank, and to evaporate water by heating the temperature of the water in the bubbling water tank to humidify the gas flowing through the bubbling water tank, for example, chinese utility model patent publication No. CN202792334U discloses a gas humidification system, which comprises a humidification device, wherein the humidification device comprises a first container, a second container, a spray header and a circulation pump, the first container is set in a cylindrical shape, the circulation pump pumps the humidification liquid in the first container into the second container from the bottom end of the first container, and the humidification liquid flows back to the spray header in the first container to be sprayed out after being heated by the second container; air enters the first container from the lower end of the first container, and an air outlet is formed in the upper end of the first container; after entering the humidifying device, the air firstly passes through the humidifying liquid in the first container in a bubbling mode, and then is further humidified in a spraying mode, so that the air is fully humidified. However, this method is limited by the height of the bubble box and is only suitable for use in low-power test equipment. Secondly, the principle of spraying and humidifying is that precipitation is sprayed out through a spray head and is mixed with gas for a short time to humidify the gas, but the liquid water is easily brought into a test system and a tested electric pile by the method, so that a relative humidity sensing element and even a fuel cell are damaged. Thirdly, the principle of membrane permeation humidification is to realize humidification of gas by permeating water to the other side of the membrane and mixing the water with the gas through the concentration difference of the water, but the permeable membrane is expensive, complex in process, high in cost and narrow in humidity adjustable range.
Disclosure of Invention
The invention aims to provide a humidifying device and a humidifying method which have simple structure, can adapt to the humidification of a high-power fuel cell and prevent the fuel cell from being damaged.
In order to solve the technical problems, the invention provides the following technical scheme:
the utility model provides a fuel cell system's gaseous humidification device, includes humidification case, gaseous equipartition device, supersound humidification device, mixed flow device, heating device and vapor separation device, the humidification case is inside hollow box, the humidification incasement portion sets gradually by bottom to top gaseous equipartition device, supersound humidification device, mixed flow device, heating device and vapor separation device, be provided with first air inlet, second air inlet, third air inlet, water inlet and gas outlet on the humidification case respectively, first air inlet and second air inlet respectively with gaseous equipartition device and mixed flow device are connected, the third air inlet is connected with the one end that the second air inlet was kept away from to the mixed flow device, the water inlet sets up in the humidification bottom of the case portion, the gas outlet sets up at the humidification roof portion.
The humidifying device is simple in structure and process and low in cost, can be suitable for different application sites, can flexibly switch working modes, and can adapt to the humidifying requirements of different power fuel cells by adjusting the flow of the second air inlet and the third air inlet to control the air output of the air outlet, or adjust the flow of the first air inlet and the voltage of the ultrasonic humidifying device to control the air output of the air outlet to adapt to the humidifying requirements of different power fuel cells, and control the temperature of humidified gas through the heating device, and prevent the humidified gas discharged from the air outlet from containing moisture to damage the fuel cells through the water-vapor separation device.
Preferably, the mixed flow device comprises a plurality of groups of mixed flow structures, the mixed flow structures are stacked, each mixed flow structure comprises a mixed flow layer, a mass transfer layer and a buffer layer, the mixed flow layer, the mass transfer layer and the buffer layer are sequentially arranged from bottom to top, and two ends of the mixed flow layer are respectively connected with the second air inlet and the third air inlet; through the matching arrangement of the mixed flow layer and the transmission layer, the sufficient mixing of the gas to be humidified and the steam is ensured to realize the first-stage heat transfer and mass transfer and provide a 'hotbed' in effective contact with the mixed gas, and the second-stage heat transfer and mass transfer are completed.
Preferably, the mixed flow layer comprises a plurality of first pipelines and a plurality of second pipelines, the first pipelines and the second pipelines are horizontally arranged at intervals, the first pipelines are communicated with the second air inlet, the second pipelines are communicated with the third air inlet, the first pipelines and the second pipelines are respectively provided with a first through hole and a second through hole, and the first through holes and the second through holes on the adjacent first pipelines and the second pipelines are oppositely arranged.
Preferably, the transmission layer is formed by horizontally overlapping a plurality of metal sheets, and a plurality of third through holes are uniformly formed in the metal sheets.
Preferably, the metal sheet is of an accordion type.
Preferably, the heating device comprises a plurality of layers of heating wire mesh plates and a temperature control device, the heating wire mesh plates are stacked, two ends of each heating wire mesh plate are respectively fixed on the inner wall of the humidifying box, one end of the temperature control device is connected with the heating wire mesh plates, and the other end of the temperature control device is arranged outside the humidifying box and used for adjusting the temperature of the heating wire mesh plates; not only realize the heating of mist, can also preheat the surface temperature of humidification case and all inside devices before the gas mixing, improve the humidification effect of treating the humidification gas.
Preferably, the temperature control device comprises a temperature probe, a temperature control instrument and an electric power regulator, the temperature probe is respectively arranged on the bottom heating wire mesh plate and the top heating wire mesh plate, the temperature probe is electrically connected with the temperature control instrument, and the output end of the electric power regulator is connected with the heating wire mesh plate.
Preferably, the heating wires of the heating wire net plates between adjacent heating wire net plates are arranged in a staggered manner; the heat conversion rate of the gas mixed by the flow mixing device on the heating wire net plate is improved.
Preferably, the first and second air inlets are arranged in parallel.
Preferably, a liquid level detector is further arranged on the side face of the bottom of the humidifying box.
Preferably, the present invention further provides a humidification method for a gas humidification device of a fuel cell system, the gas humidification device being applied without a boiler, comprising the steps of:
step 1: starting the heating device to preheat the interior of the humidifying box;
step 2: closing the second air inlet and the third air inlet, opening the water inlet to inject water into the humidifying box, starting the ultrasonic humidifying device to atomize water, simultaneously opening the first air inlet to charge the gas to be humidified into the gas distribution device, naturally mixing atomized water particles with the uniformly distributed gas to be humidified, humidifying the gas to be humidified, and controlling the flow of mixed gas by adjusting the air inlet flow of the first air inlet and adjusting the voltage of the ultrasonic humidifying device to control the atomizing amount;
and step 3: the mixed gas passes through the mixed flow device and then is heated by the heating device, and the temperature of the mixed gas is controlled by controlling the heating device;
and 4, step 4: the gas heated by the heating device is subjected to water-vapor separation by the water-vapor separation device, so that humidified gas is obtained and discharged from the gas outlet.
Preferably, the present invention further provides a humidification method for a gas humidification device of a fuel cell system, the gas humidification device including a boiler at an application site thereof, comprising the steps of:
step 1: turning off the ultrasonic humidifying device, and turning on the heating device to preheat the interior of the humidifying box;
step 2: the first air inlet and the water inlet are closed, a steam outlet of the steam boiler is communicated with the third air inlet, the second air inlet is opened to convey gas to be humidified, the gas to be humidified and steam respectively enter the flow mixing device to be mixed, the humidification of the gas to be humidified is realized, and the flow of the mixed gas is controlled by adjusting the air inlet flow of the second air inlet and the third air inlet;
and step 3: the mixed gas passes through the mixed flow device and then is heated by the heating device, and the temperature of the mixed gas is controlled by controlling the heating device;
and 4, step 4: the gas heated by the heating device is subjected to water-vapor separation by the water-vapor separation device, so that humidified gas is obtained and discharged from the gas outlet.
Compared with the prior art, the invention has the beneficial effects that:
1. the humidifying device is simple in structure and process and low in cost, can be suitable for different application sites, can flexibly switch working modes, and can adapt to the humidifying requirements of different power fuel cells by adjusting the flow of the second air inlet and the third air inlet to control the air output of the air outlet, or adjust the flow of the first air inlet and the voltage of the ultrasonic humidifying device to control the air output of the air outlet to adapt to the humidifying requirements of different power fuel cells, and control the temperature of humidified gas through the heating device, and prevent the humidified gas discharged from the air outlet from containing moisture to damage the fuel cells through the water-vapor separation device.
2. Through the matching arrangement of the mixed flow layer and the transmission layer, the sufficient mixing of the gas to be humidified and the steam is ensured to realize the first-stage heat transfer and mass transfer and provide a 'hotbed' in effective contact with the mixed gas, and the second-stage heat transfer and mass transfer are completed.
3. Through heating device's setting, not only realize the heating of mist, can also preheat the surface temperature of humidification case and all inside devices before the gas mixing, improve the humidification effect of treating the humidified gas.
4. The heating wires of the heating wire net plates between adjacent heating wire net plates are arranged in a staggered mode to improve the heat conversion rate of the gas mixed by the flow mixing device on the heating wire net plates.
Drawings
Fig. 1 is a schematic structural view of a gas humidifying device of a fuel cell system according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of a flow mixing device according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a mixed flow layer according to an embodiment of the present invention;
FIG. 4 is a front view of a mass transfer layer according to an embodiment of the present invention;
FIG. 5 is a top view of a mass transfer layer according to an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a heating apparatus according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of the dislocation of the heater strip panels according to the embodiment of the present invention.
Detailed Description
In order to facilitate the understanding of the technical solutions of the present invention for those skilled in the art, the technical solutions of the present invention will be further described with reference to the drawings attached to the specification.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
Example one
Referring to fig. 1, the embodiment discloses a gas humidifying device of a fuel cell system, which comprises a humidifying box 1, a gas uniform distribution device 2, an ultrasonic humidifying device 3, a flow mixing device 4, a heating device 5 and a water-vapor separation device 6, wherein the humidifying box 1 is a hollow box body, the gas uniform distribution device 2, the ultrasonic humidifying device 3, the flow mixing device 4, the heating device 5 and the water-vapor separation device 6 are sequentially arranged in the humidifying box 1 from bottom to top, a first gas inlet 11, a second gas inlet 12, a third gas inlet 13, a water inlet 14, a water outlet 15 and a gas outlet 16 are respectively arranged on the humidifying box 1, the first gas inlet 11 and the second gas inlet 12 are respectively connected with the gas uniform distribution device 2 and the flow mixing device 4, the third gas inlet 13 is connected with one end of the flow mixing device 4 far away from the second gas inlet 12, the water inlet and the water outlet 15 are arranged at the bottom of the humidifying box 1, the air outlet 16 is arranged at the top of the humidifying box.
The humidifying device is simple in structure and process and low in cost, can be suitable for different application sites, can flexibly switch working modes, controls the air output of the air outlet 16 by adjusting the flow of the second air inlet 12 and the third air inlet 13 to meet the humidifying requirements of fuel cells with different powers, or controls the air output of the air outlet 16 by adjusting the flow of the first air inlet 11 and the voltage of the ultrasonic humidifying device to meet the humidifying requirements of the fuel cells with different powers, controls the temperature of humidified gas by the heating device 5, and prevents the humidified gas discharged from the air outlet 14 from containing moisture to damage the fuel cells by the water-vapor separation device 6.
In this embodiment, gas equipartition device 2 is the gas equipartition ware, supersound humidification device 3 is the supersound humidifier, water vapor separator 6 is the vapor separation equipment, and the homoenergetic is bought in the market and is obtained.
Referring to fig. 2, the flow mixing device 4 includes a plurality of sets of flow mixing structures, the flow mixing structures are stacked, the flow mixing structures include a flow mixing layer 41, a mass transfer layer 42 and a buffer layer 43, and the flow mixing layer 41, the mass transfer layer 42 and the buffer layer 43 are sequentially arranged from bottom to top.
Referring to fig. 3, the mixed flow layer 41 includes a plurality of first ducts 411 and second ducts 412, the first ducts 411 and second ducts 412 are horizontally arranged at intervals, the first ducts 411 are communicated with the second gas inlet 12, the second ducts 412 are communicated with the third gas inlet 13, first through holes 4111 and second through holes 4121 are respectively arranged on the first ducts 411 and the second ducts 412, and the first through holes 4111 and the second through holes 4121 on the first ducts 411 and the second ducts 412 between adjacent ducts are oppositely arranged, so that the gas to be humidified in the first ducts 411 and the steam in the second ducts 412 can be sufficiently mixed to transfer energy, and the first stage of heat and mass transfer is realized.
Referring to fig. 4 and 5, the transmission layer 42 is formed by horizontally stacking a plurality of layers of pleated wave-shaped metal sheets 421, and a plurality of third through holes 4211 are uniformly formed in the metal sheets 421, so that the contact surface area of the gas mixed by the mixed flow layer 41 and the metal sheets 421 can be effectively increased, a "hotbed" in effective contact is provided for the mixed gas, and second-stage heat and mass transfer is completed in the mass transfer layer 42.
The buffer layer 43 is a section of cavity, so that the mixed gas is buffered, and meanwhile, the resistance in the cavity is smaller than that of the mixed flow layer 41 and the mass transfer layer 42, so that the flow rate of the mixed gas can be increased.
Referring to fig. 6 and 7, the heating device 5 includes a plurality of layers of heating wire mesh plates 51 and a temperature control device 52, the heating wire mesh plates 51 are stacked, two ends of each heating wire mesh plate 51 are respectively fixed on the inner wall of the humidification box 1, and the heating wires of the adjacent heating wire mesh plates 51 are arranged in a staggered manner to improve the heat conversion rate of the gas mixed by the flow mixing device 4 in the heating wire mesh plates 51, as shown in fig. 7, the staggered distance is L.
The temperature control device 52 comprises a temperature probe 521, a temperature control instrument 522, a power regulator 523 and an armor sheath 524, the temperature probes 521 are respectively arranged on the bottom heating wire mesh plate 51 and the top heating wire mesh plate 51, and are arranged in a diagonal direction, is used for measuring the temperature of the bottom and the top of the heating wire mesh plate 51, the connecting end of the temperature probe 521 is electrically connected with the temperature control instrument 522 at the outer side of the humidifying box 1 and is used for displaying the temperature signal output by the temperature probe 521, the output end of the power regulator 523 outside the humidification box 1 is connected with the heating wire net plate 51 through a heat conducting wire to provide heat for the heating wire net plate, and the voltage of power regulator 523 can be varied according to the temperature signal displayed by temperature control meter 522, thereby controlling the heat of the heater strip screen 51, and controlling the adjustment of the temperature of the mixed gas in real time, and further controlling the temperature of the humidified gas finally discharged from the gas outlet 16. Specifically, referring to fig. 6, two through holes are formed in one side of the humidification chamber 1 close to the temperature control device 52, the armor sheath 524 is hermetically welded in each through hole, the wires and the heat conducting wires connected to the temperature probe 521 respectively penetrate through the armor sheath 524, and the space between the wires and the armor sheath 524 is sealed by using a sealant, so as to prevent gas from leaking out from the humidification chamber 1.
In addition, because the surface temperature of the humidifying box 1 and all devices in the humidifying box is low before the gas is mixed, the humidifying box needs to be preheated for a period of time to ensure a good humidifying effect, and therefore the preheating time can be effectively shortened by utilizing the heating investment of the heating device 5, and the humidifying effect is improved.
Further, the first air inlet 11 and the second air inlet 12 are arranged in parallel.
Further, a liquid level detector 7 is further arranged on the side face of the bottom of the humidification box 1 and used for monitoring the water quantity inside the humidification box 1.
Example two:
when the application site of the gas humidifying device does not have a boiler, the embodiment also discloses a humidifying method of the gas humidifying device of the fuel cell system, which comprises the following steps:
step 1: and starting the heating device 5 to preheat the interior of the humidifying box 1.
Step 2: the second air inlet 12 and the third air inlet 13 are closed, water is injected into the humidifying box 1 by opening the water inlet 14, the ultrasonic humidifying device 3 is started, moisture in the humidifying box 1 is atomized, the first air inlet 11 is opened, the gas to be humidified is filled in the humidifying box 1, the gas to be humidified uniformly enters the humidifying box 1 through the gas uniform distribution device 2, atomized water particles and the uniformly distributed gas to be humidified are naturally mixed, the gas to be humidified is humidified, and the flow of mixed gas is controlled by adjusting the air inlet flow of the first air inlet 11 and adjusting the voltage control atomization amount of the ultrasonic humidifying device 3.
And step 3: the mixed gas enters the multi-layer heating wire net plate 51 for heating after passing through the flow mixing device, and the voltage of the electric power regulator 523 can be changed according to the temperature signal measured by the temperature probe 521 displayed by the temperature control instrument 522, so that the heat of the heating wire net plate 51 is controlled, and the adjustment of the temperature of the mixed gas is controlled in real time.
And 4, step 4: the mixed gas after heating is used for separating the moisture in the mixed gas through the water-vapor separation device 6, so that humidified gas is obtained and is discharged from the gas outlet 16, and the moisture in the humidified gas discharged from the gas outlet 16 is prevented from damaging the fuel cell.
Example three:
when the application site of the gas humidifying device does not have a boiler, the embodiment also discloses a humidifying method of the gas humidifying device of the fuel cell system, which comprises the following steps:
step 1: and (3) closing the ultrasonic humidifying device 3, and opening the heating device 5 to preheat the interior of the humidifying box 1.
Step 2: a steam outlet of the boiler is communicated with the third air inlet 13 for conveying steam, the first air inlet 11 is closed, the second air inlet 12 is opened for conveying gas to be humidified, the gas to be humidified and the steam respectively enter the first pipeline 411 and the second pipeline 412 in the flow mixing device 4 and flow out from the first through hole 4111 and the second through hole 4121 for mixing, so that first-stage heat transfer and mass transfer are realized, then the mixed gas is in surface contact with the metal sheet 421 to provide an effectively contacted 'hotbed' for the mixed gas, second-stage heat transfer and mass transfer are completed on the mass transfer layer 42, and finally the mixed gas passes through the third through hole 4211; and controls the flow rate of the mixed gas by adjusting the intake air flow rates of the second and third intake ports 12 and 13.
And step 3: the mixed gas enters the multi-layer heating wire net plate 51 for heating after passing through the flow mixing device, and the voltage of the electric power regulator 523 can be changed according to the temperature signal measured by the temperature probe 521 displayed by the temperature control instrument 522, so that the heat of the heating wire net plate 51 is controlled, and the adjustment of the temperature of the mixed gas is controlled in real time.
And 4, step 4: the mixed gas after heating is used for separating the moisture in the mixed gas through the water-vapor separation device 6, so that humidified gas is obtained and is discharged from the gas outlet 16, and the moisture in the humidified gas discharged from the gas outlet 16 is prevented from damaging the fuel cell.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.
The above-mentioned embodiments only represent embodiments of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the concept of the present invention, and these embodiments are all within the protection scope of the present invention.
Claims (9)
1. A gas humidification device of a fuel cell system, characterized in that: the humidifying device comprises a humidifying box, a gas uniform distribution device, an ultrasonic humidifying device, a flow mixing device, a heating device and a water-vapor separation device, wherein the humidifying box is a box body with a hollow interior, the gas uniform distribution device, the ultrasonic humidifying device, the flow mixing device, the heating device and the water-vapor separation device are sequentially arranged in the humidifying box from bottom to top, a first air inlet, a second air inlet, a third air inlet, a water inlet and a gas outlet are respectively arranged on the humidifying box, the first air inlet is connected with the gas uniform distribution device, the second air inlet is connected with the flow mixing device, the third air inlet is connected with one end, away from the second air inlet, of the flow mixing device, the water inlet is arranged at the bottom of the humidifying box, and the gas outlet is arranged at the top of the humidifying box; the mixed flow device comprises a plurality of groups of mixed flow structures, the mixed flow structures are arranged in an overlapped mode, each mixed flow structure comprises a mixed flow layer, a mass transfer layer and a buffer layer, the mixed flow layer, the mass transfer layer and the buffer layer are sequentially arranged from bottom to top, one end of the mixed flow layer is connected with the second air inlet, and the other end of the mixed flow layer is connected with the third air inlet; the heating device comprises a plurality of layers of heating wire mesh plates and a temperature control device, the heating wire mesh plates are arranged in a stacked mode, two ends of each heating wire mesh plate are fixed to the inner wall of the humidifying box respectively, one end of the temperature control device is connected with the heating wire mesh plates, and the other end of the temperature control device is arranged on the outer side of the humidifying box and used for adjusting the temperature of the heating wire mesh plates; the temperature control device comprises a temperature probe, a temperature control instrument and an electric power regulator, wherein the temperature probe is respectively arranged on the bottom heating wire mesh plate and the top heating wire mesh plate, the temperature probe is electrically connected with the temperature control instrument, and the output end of the electric power regulator is connected with the heating wire mesh plate; two through holes are formed in one side, close to the temperature control device, of the humidification box, armor sheaths are welded in the through holes in a sealing mode, and a lead connected with the temperature probe penetrates through the armor sheaths;
and closing the second air inlet and the third air inlet, opening the first air inlet and the water inlet, adjusting the flow of the first air inlet and the voltage of the ultrasonic humidifying device or closing the first air inlet and the water inlet, opening and adjusting the flow of the second air inlet and the third air inlet to control the air output of the air outlet so as to adapt to the humidifying requirements of fuel cells with different powers, opening the heating device to control the temperature of the humidified gas, and opening the water-vapor separation device to separate water from the humidified gas.
2. A gas humidifying device of a fuel cell system according to claim 1, characterized in that: the mixed flow layer comprises a plurality of first pipelines and second pipelines, the first pipelines and the second pipelines are horizontally arranged at intervals, the first pipelines are communicated with the second air inlet, the second pipelines are communicated with the third air inlet, first through holes are formed in the first pipelines, second through holes are formed in the second pipelines, and the first through holes and the second through holes in the adjacent first pipelines and the second pipelines are oppositely arranged.
3. A gas humidifying device of a fuel cell system according to claim 1, characterized in that: the transmission layer is formed by horizontally superposing a plurality of metal sheets, and a plurality of third through holes are uniformly formed in the metal sheets.
4. A gas humidifying device of a fuel cell system according to claim 3, characterized in that: the metal sheet is of an accordion-like wave shape.
5. A gas humidifying device of a fuel cell system according to claim 1, characterized in that: the heating wires of the heating wire net plates between adjacent heating wire net plates are arranged in a staggered way.
6. A gas humidifying device of a fuel cell system according to claim 1, characterized in that: the first air inlet and the second air inlet are arranged in parallel.
7. A gas humidifying device of a fuel cell system according to claim 1, characterized in that: and a liquid level detector is also arranged on the side surface of the bottom of the humidifying box.
8. A humidification method using a gas humidification device of a fuel cell system according to any one of claims 1 to 7, characterized in that: the application site of the gas humidifying device is not provided with a boiler, and the method comprises the following steps:
step 1: starting the heating device to preheat the interior of the humidifying box;
step 2: closing the second air inlet and the third air inlet, opening the water inlet to inject water into the humidifying box, starting the ultrasonic humidifying device to atomize water, simultaneously opening the first air inlet to charge the gas to be humidified into the gas distribution device, naturally mixing atomized water particles with the uniformly distributed gas to be humidified, humidifying the gas to be humidified, and controlling the flow of mixed gas by adjusting the air inlet flow of the first air inlet and adjusting the voltage of the ultrasonic humidifying device to control the atomizing amount;
and step 3: the mixed gas passes through the mixed flow device and then is heated by the heating device, and the temperature of the mixed gas is controlled by controlling the heating device;
and 4, step 4: the gas heated by the heating device is subjected to water-vapor separation by the water-vapor separation device, so that humidified gas is obtained and discharged from the gas outlet.
9. A humidification method using a gas humidification device of a fuel cell system according to any one of claims 1 to 7, characterized in that: the application site of the gas humidifying device is provided with a boiler, and the method comprises the following steps:
step 1: turning off the ultrasonic humidifying device, and turning on the heating device to preheat the interior of the humidifying box;
step 2: the first air inlet and the water inlet are closed, a steam outlet of the steam boiler is communicated with the third air inlet, the second air inlet is opened to convey gas to be humidified, the gas to be humidified and steam respectively enter the flow mixing device to be mixed, the humidification of the gas to be humidified is realized, and the flow of the mixed gas is controlled by adjusting the air inlet flow of the second air inlet and the third air inlet;
and step 3: the mixed gas passes through the mixed flow device and then is heated by the heating device, and the temperature of the mixed gas is controlled by controlling the heating device;
and 4, step 4: the gas heated by the heating device is subjected to water-vapor separation by the water-vapor separation device, so that humidified gas is obtained and discharged from the gas outlet.
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