CN114739456B - Multichannel PEM pure water electrolysis hydrogen production testing device and application method - Google Patents
Multichannel PEM pure water electrolysis hydrogen production testing device and application method Download PDFInfo
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- CN114739456B CN114739456B CN202210387456.2A CN202210387456A CN114739456B CN 114739456 B CN114739456 B CN 114739456B CN 202210387456 A CN202210387456 A CN 202210387456A CN 114739456 B CN114739456 B CN 114739456B
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- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
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- C25B1/00—Electrolytic production of inorganic compounds or non-metals
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- C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
- C25B9/17—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof
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Abstract
The application discloses a multichannel PEM pure water electrolytic hydrogen production testing device and a using method thereof, wherein the multichannel PEM pure water electrolytic hydrogen production testing device comprises a frame, a pure water supply mechanism, a hydrogen detection assembly and a power supply assembly, the pure water supply mechanism comprises a pure water supply pipeline and a pure water cooling assembly, the pure water supply pipeline comprises a water tank, a water supplementing and filling valve, a plurality of water supply channel water supply pump sets, a plurality of pure water supply pipes and a plurality of pure water return pipes, the hydrogen detection assembly comprises a hydrogen-water separator and a dryer which are arranged in the frame, an intelligent dew point instrument arranged on an instrument display area, a high-pressure mass flowmeter connected with a flow indicator, a plurality of hydrogen collecting joints arranged on an operation area, the power supply assembly comprises a power supply arranged on the frame, a conductivity instrument connected with the power supply, and a plurality of pairs of power supply joints arranged on the operation area, and the testing efficiency is improved by controlling the serial-parallel combination of the power supply and the water flow of the plurality of the water supply channels and the testing of PEM electrolytic tanks under different currents, voltages and flow rates.
Description
Technical Field
The application relates to the technical field of hydrogen production by water electrolysis, in particular to a multichannel PEM pure water electrolysis hydrogen production testing device and a using method thereof.
Background
The PEM pure water hydrogen production has the advantages of stability, cleanness, no noise and the like, is a technical high point of future power energy sources, and is a research hotspot of colleges and universities, scientific research institutions and national enterprises. In various links of development and development of an electrolytic cell in the process of producing hydrogen by using pure water through PEM electrolysis, the technical level of a testing platform of a PEM electrolytic hydrogen production unit plays a crucial role. However, the existing test bench in the market rarely or only can meet the performance test of a single electrolytic cell, and the test is single and unstable. It is important to develop a stable and efficient PEM electrolytic pure water hydrogen production unit test device.
Disclosure of Invention
The application aims to provide a multichannel PEM pure water electrolysis hydrogen production testing device and a using method thereof, which are used for solving one or more technical problems in the prior art and at least providing a beneficial selection or creation condition.
The technical scheme adopted for solving the technical problems is as follows:
the application provides a multi-channel PEM pure water electrolysis hydrogen production testing device, which comprises: the device comprises a rack, a pure water supply mechanism, a hydrogen detection assembly and a power supply assembly, wherein a test table top and a control panel are arranged on the front side of the rack, the control panel is arranged on the upper part of the rear side of the test table top, a plurality of clamping supports for clamping a PEM (PEM) electrolytic cell are uniformly distributed on the test table top, the control panel comprises an instrument display area arranged on the upper part and an operation area arranged on the lower part, and a flow display instrument is arranged in the instrument display area; the pure water supply mechanism comprises a pure water supply pipeline and a pure water cooling assembly, the pure water supply pipeline comprises a water tank, a water supplementing electromagnetic valve, a water supply pump set, a plurality of pure water supply pipes and a plurality of pure water return pipes, the water tank is arranged in a rack, the water supplementing electromagnetic valve is connected to the upper side of the water tank, the water supply pump set is provided with a multi-channel pressure control instrument arranged in an instrument display area, a heating assembly and a third sensor are arranged in the water tank, a water inlet of the pure water cooling assembly is connected with the water tank, a water outlet of the pure water cooling assembly is connected with water inlet ends of the plurality of water supply channels, a plurality of pure water return joints are arranged in the operation area, the pure water supply joints and the water supply channels are connected with each other, a control water valve is arranged between each pure water supply joint and each pure water return pipe, one end of the pure water supply pipe is connected with the pure water return pipe is connected with the pure water supply joint in a one-to-one correspondence manner, and the other ends of the pure water return pipe and the pure water return pipe are detachably connected with the water outlet of the water electrolyzer; the hydrogen detection assembly comprises a hydrogen-water separator and a dryer which are arranged in a rack, an intelligent dew-point meter arranged on an instrument display area, a high-pressure mass flowmeter connected with the flow indicator, and a plurality of hydrogen collecting connectors arranged on an operation area, wherein the hydrogen collecting connectors are connected with a hydrogen collecting pipe, the hydrogen collecting pipe is detachably connected with a hydrogen port of a PEM (PEM) electrolytic tank, the inner ends of the hydrogen collecting connectors are connected with an inlet of the hydrogen-water separator, a second sensor and a one-way valve are sequentially arranged between each hydrogen collecting connector and an air inlet end of the hydrogen-water separator, an air outlet end of the hydrogen-water separator is connected with an air inlet end of the dryer, a hydrogen pressure meter arranged at the front side of a test bench is connected between the air outlet end of the hydrogen-water separator and the dryer, the air outlet end of the dryer is respectively connected with the intelligent dew-point meter and the high-pressure mass flowmeter through three-way connectors, an electromagnetic valve is arranged between the intelligent dew-point meter and the dryer, and a flowmeter is arranged between the high-pressure mass flowmeter and the electromagnetic valve; the power supply assembly comprises a power supply, a conductivity meter and a plurality of pairs of power supply connectors, wherein the power supply is arranged on the rack, the conductivity meter is connected with the power supply, the power supply connectors are arranged in an operation area, the power supply connectors are connected with power supply wires, each pair of power supply connectors are detachably connected with two electrodes of the PEM electrolytic tank through two power supply wires, the conductivity meter is arranged in a meter display area, and the power supply supplies power to the plurality of pairs of power supply connectors;
the power supply connectors, the hydrogen collecting connectors, the pure water supply connectors, the pure water backwater connectors and the control water valves are arranged in a one-to-one correspondence manner.
The multichannel PEM pure water electrolysis hydrogen production testing device has the beneficial effects that: when in use, a plurality of PEM electrolytic tanks can be clamped on a plurality of clamping brackets, then the other ends of a corresponding pair of pure water supply pipe and pure water return pipe are connected with the water inlet and the water outlet of the PEM electrolytic tank, a corresponding hydrogen collecting pipe is connected with the hydrogen inlet of the PEM electrolytic tank, a corresponding pair of power supply connectors are connected with two electrodes of the PEM electrolytic tank through two power supply wires, pure water of the water tank is heated and then cooled by a pure water cooling assembly, so that pure water coming out of the pure water cooling assembly reaches the working temperature, the pure water flow and the pressure of each water supply channel in a water supply pump set are controlled by a multichannel pressure controller, a plurality of corresponding control water valves are opened, the conductivity controllers control the power supply to supply different currents and voltages to each PEM electrolytic tank, so that the plurality of PEM electrolytic tanks can electrolyze water under different working conditions, pure water flows back to the water tank from the PEM electrolytic tank, hydrogen from the PEM electrolytic tank enters the hydrogen-water separator and the dryer after passing through the second sensor and the one-way valve, the hydrogen-water separator separates the hydrogen from water, the dryer dries the hydrogen, the hydrogen after drying treatment is divided into two branches, hydrogen in the branch I sequentially passes through the dew point electromagnetic valve and the intelligent dew point meter, the intelligent dew point meter detects the water content in the hydrogen, the purpose of measuring the purity of the hydrogen is achieved, hydrogen in the branch II sequentially passes through the flowmeter electromagnetic valve and the high-pressure mass flowmeter, the high-pressure mass flowmeter can test the hydrogen production rate, the test of the PEM electrolytic tanks under different currents, voltages and flows can be simultaneously carried out by controlling the serial-parallel combination of the power supply and the water supply pump group of the water supply channels, the test efficiency is improved, and the instrument display area and the operation area on the control panel are integrated, the operation is more convenient and visual.
As a further improvement of the technical scheme, a pressure reducing valve is arranged between the intelligent dew point meter and the dew point electromagnetic valve, the pressure reducing valve is arranged on the front side of the test table surface, an overpressure switch, a pressure tracker, a backpressure valve and an output electromagnetic valve are sequentially connected between the hydrogen pressure meter and the dryer, and the backpressure valve is arranged on the front side of the test table surface. In order to ensure that the hydrogen has certain pressure, an overpressure switch is arranged, and the overpressure switch is controlled to be opened when the pressure is set, and the hydrogen sequentially flows into the pressure tracker, the backpressure valve and the output electromagnetic valve and then enters the dryer.
As a further improvement of the technical scheme, an emptying pipeline is connected between the back pressure valve and the output electromagnetic valve, and the emptying pipeline is sequentially connected with an emptying electromagnetic valve, an emptying manual valve and an emptying sensor.
If the hydrogen pressure is over set or the hydrogen amount is large, the overpressure switch and the emptying electromagnetic valve are opened, and the hydrogen is discharged outwards through the emptying pipeline.
As a further improvement of the technical scheme, the water outlet of the hydrogen-water separator is connected with the water tank through a water return pipeline, and a water return electromagnetic valve is arranged on the water return pipeline.
When the water in the hydrogen-water separator reaches a set value, the water return electromagnetic valve is controlled to be opened, and the water flows back to the water tank.
As a further improvement of the technical scheme, the hydrogen-water separator is of a multi-stage hydrogen-water separator structure, and the dryer comprises a plurality of drying pipes which are connected in sequence.
The scheme adopts the structure of the multistage hydrogen-water separator, improves the effect of hydrogen-water separation, and improves the drying effect by arranging a plurality of drying pipes.
As a further improvement of the technical scheme, a water quality and temperature detector is arranged between the water supply pump set and the pure water cooling assembly, an outlet of the water supply pump set is connected with a drainage pipeline connected with a plurality of water supply channels, and a drainage electromagnetic valve is arranged on the drainage pipeline.
The water quality and temperature detector is arranged to monitor the water quality of pure water, if the water quality is unqualified, the drainage solenoid valve is opened, the water supply pump set discharges water to the drainage pipeline, and after the water quality is qualified, the corresponding control water valve is opened.
As a further improvement of the technical scheme, a water outlet is formed in the bottom of the water tank and connected with a water draining pipeline through a water draining valve, and the third sensor comprises a liquid level sensor and a temperature sensor.
If the water level of the water tank in the scheme is higher than the upper limit of the set value, the drain valve is opened, and if the water level is lower than the lower limit of the set value, the water supplementing valve is opened.
As a further improvement of the technical scheme, the pure water cooling assembly comprises a buffer tank, a heat exchanger, a chiller and a circulating pump which are sequentially connected in a closed loop, wherein a water inlet and a water outlet of the heat exchanger are respectively connected with a water tank and water inlet ends of a plurality of water supply channels, and the water supply pump set is a multichannel peristaltic pump.
The scheme is characterized in that the buffer tank, the heat exchanger, the chiller and the circulating pump form a refrigerant cooling loop to cool pure water.
As a further improvement of the technical scheme, the rack is of a chassis structure, an upper mounting cavity and a lower mounting cavity which are mutually communicated are arranged in the rack, and a cooling fan is arranged at the top of the rack.
The cooling fan mainly dissipates heat in the frame, and avoids overheating. The upper and lower mounting chambers are used for mounting various parts.
In addition, the application also provides a using method of the multi-channel PEM pure water electrolytic hydrogen production testing device, and the multi-channel PEM pure water electrolytic hydrogen production testing device also comprises a PLC control unit, wherein the PLC control unit is in control connection with each electric element, and the method comprises the following specific steps:
s1, clamping a plurality of PEM electrolytic cells to be tested on a clamping bracket in a one-to-one correspondence manner, connecting the other ends of a plurality of pairs of pure water supply pipes and pure water return pipes with the water inlets and water outlets of the PEM electrolytic cells, connecting a plurality of hydrogen collecting pipes with the hydrogen ports of the PEM electrolytic cells, and connecting a plurality of pairs of power supply connectors with two electrodes of the PEM electrolytic cells through power supply wires;
s2, tap water is connected with a water supplementing valve through a small water purifier and supplies water to the water tank, the heating assembly heats water in the water tank, and the third sensor monitors the water level and temperature of the water tank;
s3, after the pure water in the water tank is heated to a set temperature, the pure water is cooled by the pure water cooling assembly, so that the pure water from the pure water cooling assembly reaches the working temperature;
s4, the water quality and temperature detector purely detects the outlet of the pure water cooling component, if the detected water quality is unqualified, the water discharge electromagnetic valve is opened, the water supply pump set is started, unqualified pure water is discharged, and then the water tank is subjected to water supplementing, heating and cooling, so that the water quality and temperature detector is qualified in detecting the water quality.
S5, opening each control water valve, starting a water supply pump set, controlling the water flow and the pressure of a plurality of water supply channels by a multichannel pressure controller, controlling the series-parallel combination of power supplies by a PLC control unit after water enters the PEM electrolytic tanks to meet the electrolytic hydrogen production working requirement, enabling the current and the voltage applied to each PEM electrolytic tank to be different, and finally enabling the water to flow back to the water tank;
s6, after hydrogen generated by electrolysis of the PEM electrolytic tank passes through the second sensor and the one-way valve, the hydrogen enters the hydrogen-water separator and the dryer, the hydrogen-water separator separates the hydrogen from water, the dryer dries the hydrogen, the hydrogen subjected to drying treatment is divided into two branches, the hydrogen in the first branch sequentially passes through the dew point electromagnetic valve and the intelligent dew point meter, the intelligent dew point meter detects the water content in the hydrogen, the purpose of measuring the hydrogen purity is achieved, the hydrogen in the second branch sequentially passes through the electromagnetic valve of the flowmeter and the high-pressure mass flowmeter, and the high-pressure mass flowmeter can test the hydrogen production rate.
Drawings
The application is further described below with reference to the drawings and examples;
FIG. 1 is a schematic diagram of a device for testing pure water electrolysis hydrogen production through a channel PEM according to one embodiment of the present application;
FIG. 2 is a schematic diagram of a device for testing pure water electrolysis hydrogen production by channel PEM provided by the application, which is in another view angle;
FIG. 3 is a side view of one embodiment of a channel PEM pure water electrolytic hydrogen production test device provided by the present application;
FIG. 4 is a control flow diagram of one embodiment of a channel PEM pure water electrolysis hydrogen production test apparatus provided by the present application.
Detailed Description
Reference will now be made in detail to the present embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein the accompanying drawings are used to supplement the description of the written description so that one can intuitively and intuitively understand each technical feature and overall technical scheme of the present application, but not to limit the scope of the present application.
In the description of the present application, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present application and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present application.
In the description of the present application, if there is a word description such as "a plurality" or the like, the meaning of a plurality is one or more, and the meaning of a plurality is two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and above, below, within, etc. are understood to include the present number.
In the description of the present application, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present application can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.
Referring to fig. 1 to 4, the multi-channel PEM pure water electrolysis hydrogen production test apparatus of the present application makes the following examples:
the multi-channel PEM pure water electrolysis hydrogen production testing device of the embodiment comprises a rack 30, a pure water supply mechanism, a hydrogen detection assembly and a power supply assembly.
The front side of the rack 30 is provided with a test table surface 32 and a control panel 33 arranged on the upper portion of the rear side of the test table surface 32, the test table surface 32 is uniformly provided with a plurality of clamping supports for clamping the PEM electrolytic tank 10, the control panel 33 comprises an instrument display area arranged on the upper portion and an operation area arranged on the lower portion, the instrument display area is provided with a flow display 27 connected with each flow sensor, the rack 30 is of a cabinet structure, an upper mounting cavity and a lower mounting cavity which are mutually communicated are arranged in the rack 30, the top of the rack 30 is provided with a heat dissipation fan 31, the heat dissipation fan 31 mainly dissipates the inside of the rack 30, the phenomenon of overheating is avoided, and the upper mounting cavity and the lower mounting cavity are used for mounting each part.
The pure water supply mechanism comprises a pure water supply pipeline and a pure water cooling assembly, the pure water supply pipeline comprises a water tank 1 installed in a rack 30, a water supply pump set 2 connected to the upper side of the water tank 1, a plurality of water supply channels, a plurality of pure water supply pipes 34 and a plurality of pure water return pipes 35, the water supply pump set is provided with a multichannel pressure controller 29 arranged in an instrument display area, the water supply pump set is a multichannel peristaltic pump 8, the multichannel pressure controller 29 is used for controlling the pump head driving force of each water supply channel, a heating assembly and a third sensor are arranged in the water tank 1, a water quality detector 44 is arranged between the water supply pump set and the pure water cooling assembly, a water outlet connected with the water supply channels is connected with a water discharge pipeline, the water discharge electromagnetic valve 3 is installed in the water discharge pipeline, the bottom of the water tank 1 is provided with a water discharge valve 45, the water discharge outlet is connected with the water outlet through a water discharge valve 45, the third sensor comprises a liquid level sensor and a temperature sensor, the water quality detector 44 is arranged in the embodiment to control the water level controller to control the water supply pipeline, if the water quality detector is not limited by the water quality detector is equal to the water quality detector 2, the water quality detector is opened, and the water quality detector is limited by the water quality detector is opened, and the water quality detector is controlled to be less than a water level valve 2 if the water quality is limited by the water level is opened, and the water level is not is equal to the water level 2, and the water level is not limited by the water level valve is opened, and is opened by the water valve and is corresponding to the water valve is opened by a water valve and has a water valve and is if the water valve.
The pure water cooling assembly of this embodiment includes buffer tank 5, heat exchanger 4, chiller 7 and circulating pump 6 that closed loop connects gradually, the water inlet and outlet of heat exchanger 4 links to each other with water tank 1, a plurality of water supply channel's water inlet end respectively, cools off with pure water through the refrigerant cooling circuit that buffer tank 5, heat exchanger 4, chiller 7 and circulating pump 6 formed.
The operation area is provided with a plurality of pure water supply joints connected with the water outlet ends of a plurality of water supply channels respectively, a plurality of pure water backwater joints connected with the water tank 1, a control water valve 9 is arranged between each pure water supply joint and the water supply channel, the control water valve 9 is arranged in the operation area, one end of the pure water supply pipe 34 is connected with the pure water supply joints in a one-to-one correspondence manner, the pure water backwater pipe 35 is connected with the pure water backwater joints in a one-to-one correspondence manner, and a corresponding pair of the pure water supply pipe 34 and the other end of the pure water backwater pipe 35 are detachably connected with the water inlet and the water outlet of the PEM electrolytic tank 10.
In use, a plurality of PEM electrolytic cells 10 are clamped on a plurality of clamping brackets, and then the other ends of a corresponding pair of pure water supply pipe 34 and pure water return pipe 35 are connected with the water inlet and outlet of the PEM electrolytic cells 10.
The hydrogen detection assembly comprises a hydrogen-water separator 13 and a dryer which are arranged in a rack 30, an intelligent dew-point meter 24 arranged on an instrument display area, a high-pressure mass flowmeter 26 connected with a flow indicator 27, and a plurality of hydrogen collecting connectors arranged on an operation area, wherein the hydrogen collecting connectors are connected with a hydrogen collecting pipe 36, the hydrogen collecting pipe 36 is detachably connected with a hydrogen port of a PEM electrolytic tank 10, the inner ends of the plurality of the hydrogen collecting connectors are connected with an inlet of the hydrogen-water separator 13, a second sensor 11 and a check valve 12 are sequentially arranged between each hydrogen collecting connector and an air inlet end of the hydrogen-water separator 13, an air outlet end of the hydrogen-water separator 13 is connected with an air inlet end of the dryer, a hydrogen pressure meter 15 arranged on the front side of a test table surface 32 is connected between the air outlet end of the hydrogen-water separator 13 and the dryer, the air outlet end of the dryer is respectively connected with the intelligent dew-point meter 24 and the high-pressure mass flowmeter 26 through three-way connectors, a dew-point solenoid valve 22 is arranged between the dew-point meter 24 and the dryer, and a solenoid valve 25 is arranged between the high-pressure mass flowmeter 26 and the dryer.
Further, a pressure reducing valve 23 is arranged between the intelligent dew-point meter 24 and the dew-point electromagnetic valve 22, the pressure reducing valve 23 is arranged on the front side of the test table surface 32, an overpressure switch 16, a pressure tracker 17, a backpressure valve 18 and an output electromagnetic valve 19 are sequentially connected between the hydrogen pressure meter 15 and the dryer, the backpressure valve 18 is arranged on the front side of the test table surface 32, the overpressure switch 16 is arranged for ensuring that hydrogen has a certain pressure, the overpressure switch 16 is controlled to be opened only when the pressure is set, and the hydrogen sequentially flows into the dryer after flowing through the pressure tracker 17, the backpressure valve 18 and the output electromagnetic valve 19.
An evacuation line 39 is connected between the back pressure valve 18 and the output solenoid valve 19, the evacuation line 39 is sequentially connected with an evacuation solenoid valve 21, an evacuation manual valve 40, and an evacuation sensor 41, and if the hydrogen pressure is too set or the hydrogen amount is large, the overpressure switch 16 and the evacuation solenoid valve 21 are opened, and the hydrogen is discharged to the outside through the evacuation line 39.
Furthermore, the water outlet of the hydrogen-water separator 13 is connected with the water tank 1 through a water return pipeline 42, the water return pipeline 42 is provided with a water return electromagnetic valve 43, and when the water in the hydrogen-water separator 13 reaches a set value, the water return electromagnetic valve 43 is controlled to be opened, and the water flows back to the water tank 1.
The hydrogen-water separator 13 in this embodiment is a multi-stage hydrogen-water separator structure, and the dryer includes a plurality of drying pipes 20 connected in sequence, and the structure of the multi-stage hydrogen-water separator is adopted to improve the effect of hydrogen-water separation, and a plurality of drying pipes 20 are provided to improve the drying effect.
In use, the corresponding hydrogen header 36 is connected to the hydrogen port of the PEM electrolyzer 10.
The power supply assembly comprises a power supply 37 arranged on the rack 30, a conductivity meter 28 connected with the power supply 37, and a plurality of pairs of power supply connectors 38 arranged in an operation area, wherein the power supply connectors 38 are connected with power supply wires, each pair of power supply connectors 38 are detachably connected with two electrodes of the PEM electrolytic tank 10 through two power supply wires, the conductivity meter 28 is arranged in an instrument display area, the power supply 37 supplies power to the plurality of pairs of power supply connectors 38, and when in use, a corresponding pair of power supply connectors 38 are connected with two electrodes of the PEM electrolytic tank 10 through two power supply wires.
The embodiment also provides a using method of the multichannel PEM pure water electrolytic hydrogen production testing device, and the multichannel PEM pure water electrolytic hydrogen production testing device also comprises a PLC control unit, wherein the PLC control unit is in control connection with each electric element, and the method comprises the following specific steps:
s1, clamping a plurality of PEM electrolytic cells 10 to be tested on a clamping bracket in a one-to-one correspondence manner, connecting the other ends of a plurality of pairs of pure water supply pipes 34 and pure water return pipes 35 with the water inlets and water outlets of the plurality of PEM electrolytic cells 10, connecting a plurality of hydrogen collecting pipes 36 with hydrogen ports of the plurality of PEM electrolytic cells 10, and connecting a plurality of pairs of power supply connectors 38 with two electrodes of the PEM electrolytic cells 10 through power supply wires;
s2, tap water is connected with a water supplementing valve 2 through a small water purifier and supplies water to the water tank 1, a heating assembly heats water in the water tank 1, and a third sensor monitors the water level and temperature of the water tank 1;
s3, after the pure water in the water tank 1 is heated to a set temperature, the pure water is cooled by the pure water cooling assembly, so that the pure water from the pure water cooling assembly reaches the working temperature;
s4, the water quality and water temperature detector 44 purely detects the outlet of the pure water cooling assembly, if the detected water quality is unqualified, the water discharge electromagnetic valve 3 is opened, the water supply pump set is started, unqualified pure water is discharged, and then the water tank 1 is subjected to water supplementing, heating and cooling, so that the water quality and water temperature detector 44 detects that the detected water quality is qualified.
S5, opening each control water valve 9, starting a water supply pump set, controlling the water flow and the pressure of a plurality of water supply channels by a multi-channel pressure controller 29, controlling the series-parallel combination of power supplies 37 by a PLC control unit after water enters PEM electrolytic tanks 10 to meet the electrolytic hydrogen production working requirement, enabling the current and the voltage applied to each PEM electrolytic tank 10 to be different, and finally enabling the water to flow back to the water tank 1;
s6, after hydrogen generated by electrolysis of the PEM electrolytic tank 10 passes through the second sensor 11 and the one-way valve 12, the hydrogen enters the hydrogen-water separator 13 and the dryer, the hydrogen-water separator 13 separates the hydrogen from water, the dryer dries the hydrogen, the hydrogen subjected to drying treatment is divided into two branches, the hydrogen of the first branch sequentially passes through the dew point electromagnetic valve 22 and the intelligent dew point meter 24, the water content in the hydrogen is detected by the intelligent dew point meter 24, the purpose of measuring the purity of the hydrogen is achieved, the hydrogen of the second branch sequentially passes through the flowmeter electromagnetic valve 25 and the high-pressure mass flowmeter 26, and the high-pressure mass flowmeter 26 can test the hydrogen production rate.
The present embodiment can test the PEM electrolytic cells 10 under different currents, voltages and flows simultaneously by controlling the serial-parallel combination of the power supply 37 and the water flow of the water supply pump group of the water supply channels, so as to improve the test efficiency, and the instrument display area and the operation area on the control panel 33 integrate the display and operation areas, so that the operation is more convenient and visual.
While the preferred embodiment of the present application has been described in detail, the application is not limited to the embodiments, and various equivalent modifications and substitutions can be made by those skilled in the art without departing from the spirit of the application, and these modifications and substitutions are intended to be included in the scope of the present application as defined in the appended claims.
Claims (10)
1. A multichannel PEM pure water electrolysis hydrogen production testing device is characterized in that: it comprises the following steps:
the device comprises a rack (30), wherein a test table board (32) and a control panel (33) are arranged on the front side of the rack, the control panel (33) is arranged on the upper part of the rear side of the test table board (32), a plurality of clamping supports for clamping a PEM (PEM) electrolytic tank (10) are uniformly distributed on the test table board (32), the control panel (33) comprises an instrument display area arranged on the upper part and an operation area arranged on the lower part, and the instrument display area is provided with a flow display instrument (27);
the pure water supply mechanism comprises a pure water supply pipeline and a pure water cooling assembly, wherein the pure water supply pipeline comprises a water tank (1) installed in a rack (30), a water supplementing electromagnetic valve (2) connected to the upper side of the water tank (1), a water supply pump set provided with a plurality of water supply channels independent of each other, a plurality of pure water supply pipes (34) and a plurality of pure water return pipes (35), the water supply pump set is provided with a multichannel pressure control instrument (29) arranged in an instrument display area, a heating assembly and a third sensor are arranged in the water tank (1), a water inlet of the pure water cooling assembly is connected with the water tank (1), a water outlet of the pure water cooling assembly is connected with water inlet ends of the plurality of water supply channels, a plurality of pure water supply joints connected with water outlet ends of the plurality of water supply channels respectively, a plurality of return water joints connected with the water tank (1) are arranged in the operation area, a control water valve (9) is arranged between each pure water supply joint and the water supply channel, one end of the pure water supply pipe (34) is connected with one-to-one water return pipe (35) in one-to-one correspondence with the water return pipe (35) and one-to-one correspondence with the water return pipe (35);
the hydrogen detection assembly comprises a hydrogen-water separator (13) and a dryer which are arranged in a rack (30), an intelligent dew-point meter (24) arranged on an instrument display area, a high-pressure mass flowmeter (26) connected with a flow indicator (27), and a plurality of hydrogen collecting connectors arranged in an operation area, wherein the hydrogen collecting connectors are connected with a hydrogen collecting pipe (36), the hydrogen collecting pipe (36) is detachably connected with a hydrogen port of a PEM (10), the inner ends of the plurality of hydrogen collecting connectors are connected with an inlet of the hydrogen-water separator (13), a second sensor (11) and a check valve (12) are sequentially arranged between each hydrogen collecting connector and an air inlet end of the hydrogen-water separator (13), an air outlet end of the hydrogen-water separator (13) is connected with an air inlet end of the dryer, a hydrogen pressure meter (15) arranged on the front side of a test table top (32) is connected between the air outlet end of the hydrogen-water separator (13) and the dryer, an air outlet end of the dryer is respectively connected with the intelligent dew-point meter (24) and the high-pressure mass flowmeter (26) through three-way connectors, and a solenoid valve (25) is arranged between the intelligent dew-point meter (24) and the solenoid valve (25);
the power supply assembly comprises a power supply source (37) arranged on the rack (30), a conductivity meter (28) connected with the power supply source (37) and a plurality of pairs of power supply connectors (38) arranged in an operation area, wherein the power supply connectors (38) are connected with power supply wires, each pair of power supply connectors (38) is detachably connected with two electrodes of the PEM electrolytic cell (10) through two power supply wires, the conductivity meter (28) is arranged in an instrument display area, and the power supply source (37) supplies power to the plurality of pairs of power supply connectors (38);
the power supply connectors (38), the hydrogen collecting connectors, the pure water supply connectors, the pure water backwater connectors and the control water valves (9) are arranged in a one-to-one correspondence manner.
2. A multi-channel PEM pure water electrolytic hydrogen production test device according to claim 1,
the method is characterized in that:
be provided with relief pressure valve (23) between intelligence dew point meter (24) and dew point solenoid valve (22), relief pressure valve (23) set up in the front side of test mesa (32) be connected gradually superpressure switch (16), pressure tracker (17), backpressure valve (18) and output solenoid valve (19) between hydrogen pressure gauge (15) and the desicator, backpressure valve (18) set up in the front side of test mesa (32).
3. A multi-channel PEM pure water electrolytic hydrogen production test device according to claim 2,
the method is characterized in that:
an evacuation pipeline (39) is connected between the back pressure valve (18) and the output electromagnetic valve (19), and the evacuation pipeline (39) is sequentially connected with an evacuation electromagnetic valve (21), an evacuation manual valve (40) and an evacuation sensor (41).
4. A multi-channel PEM pure water electrolytic hydrogen production test device according to claim 1,
the method is characterized in that:
the water outlet of the hydrogen-water separator (13) is connected with the water tank (1) through a water return pipeline (42), and a water return electromagnetic valve (43) is arranged on the water return pipeline (42).
5. A multi-channel PEM pure water electrolytic hydrogen production test device according to claim 1,
the method is characterized in that:
the hydrogen-water separator (13) is of a multi-stage hydrogen-water separator structure, and the dryer comprises a plurality of drying pipes (20) which are connected in sequence.
6. A multi-channel PEM pure water electrolytic hydrogen production test device according to claim 1,
the method is characterized in that:
a water quality and temperature detector (44) is arranged between the water supply pump set and the pure water cooling assembly, an outlet of the water supply pump set is connected with a drainage pipeline connected with a plurality of water supply channels, and a drainage electromagnetic valve (3) is arranged on the drainage pipeline.
7. A multi-channel PEM pure water electrolytic hydrogen production test device according to claim 6,
the method is characterized in that:
the bottom of the water tank (1) is provided with a water outlet, the water outlet is connected with a water draining pipeline through a water draining valve (45), and the third sensor comprises a liquid level sensor and a temperature sensor.
8. A multi-channel PEM pure water electrolytic hydrogen production test device according to claim 1,
the method is characterized in that:
the pure water cooling assembly comprises a buffer tank (5), a heat exchanger (4), a water chiller (7) and a circulating pump (6) which are sequentially connected in a closed loop, wherein a water inlet and a water outlet of the heat exchanger (4) are respectively connected with a water tank (1) and water inlet ends of a plurality of water supply channels, and the water supply pump set is a multichannel peristaltic pump (8).
9. A multi-channel PEM pure water electrolytic hydrogen production test device according to claim 1,
the method is characterized in that:
the machine frame (30) is of a machine case structure, an upper mounting cavity and a lower mounting cavity which are mutually communicated are arranged in the machine frame (30), and a cooling fan (31) is arranged at the top of the machine frame (30).
10. A method of using a multi-channel PEM pure water electrolysis hydrogen production test apparatus according to any one of claims 1 to 9, characterized in that: still include PLC control unit, PLC control unit is connected with each electrical component control, be provided with quality of water temperature detector (44) between water supply pump package and the pure water cooling module, the exit linkage of water supply pump package has the drain pipe who is connected with a plurality of water supply channel, drain solenoid valve (3) are installed to the drain pipe, and concrete step is as follows:
s1, clamping a plurality of PEM electrolytic tanks (10) to be tested on a clamping bracket in a one-to-one correspondence manner, connecting the other ends of a plurality of pairs of pure water supply pipes (34) and pure water return pipes (35) with the water inlets and water outlets of the plurality of PEM electrolytic tanks (10), connecting a plurality of hydrogen collecting pipes (36) with hydrogen ports of the plurality of PEM electrolytic tanks (10), and connecting a plurality of pairs of power supply connectors (38) with two electrodes of the PEM electrolytic tanks (10) through power supply wires;
s2, tap water is connected with a water supplementing valve (2) through a small water purifier, water is supplied to the water tank (1), water in the water tank (1) is heated by a heating assembly, and a third sensor monitors the water level and the temperature of the water tank (1);
s3, after the pure water in the water tank (1) is heated to a set temperature, the pure water is cooled by the pure water cooling assembly, so that the pure water from the pure water cooling assembly reaches the working temperature;
s4, the pure water cooling component is purely detected by the water quality and water temperature detector (44), if the detected water quality is unqualified, the water discharge electromagnetic valve (3) is opened, the water supply pump set is started, unqualified pure water is discharged, and then the water tank (1) is subjected to water supplementing, heating and cooling, so that the water quality and water temperature detector (44) detects that the water quality is qualified;
s5, opening each control water valve (9), starting a water supply pump set, controlling the water flow and the pressure of a plurality of water supply channels by a multi-channel pressure controller (29), controlling the series-parallel combination of power supplies (37) by a PLC control unit after water enters the PEM electrolytic tanks (10) to meet the electrolytic hydrogen production working requirement, enabling the current and the voltage applied to each PEM electrolytic tank (10) to be different, and finally enabling the water to flow back to the water tank (1);
s6, after hydrogen generated by electrolysis of the PEM electrolytic tank (10) passes through the second sensor (11) and the one-way valve (12), the hydrogen enters the hydrogen-water separator (13) and the dryer, the hydrogen-water separator (13) separates the hydrogen from the water, the dryer dries the hydrogen, the hydrogen subjected to drying treatment is divided into two branches, the hydrogen in the branch I sequentially passes through the dew point electromagnetic valve (22) and the intelligent dew point meter (24), the intelligent dew point meter (24) detects the water content in the hydrogen, the purpose of measuring the purity of the hydrogen is achieved, the hydrogen in the branch II sequentially passes through the flowmeter electromagnetic valve (25) and the high-pressure mass flowmeter (26), and the high-pressure mass flowmeter (26) can test the hydrogen production rate.
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