Operation test platform device for multi-channel multi-specification PEM electrolytic reactor

Abstract

An operation test platform device for a multi-channel multi-specification PEM electrolytic reactor is characterized in that a water tank is connected with a liquid level flowmeter, a drain pipe, a water inlet pipe and an electromagnetic pump, a water outlet of the electromagnetic pump is divided into two branches, one branch is connected with a purification column through a valve and then connected with an electric heater, and the other branch is directly connected with the electric heater through a valve; a water outlet of the electric heater is connected to a pure water inlet rectifying row, each outlet of the pure water inlet rectifying row is respectively connected with a water inlet of each PEM electrolytic reactor, a hydrogen discharge port of each PEM electrolytic reactor is connected with a hydrogen condenser, and a liquid phase outlet of the hydrogen condenser is connected to a water tank through a small electromagnetic valve; a water outlet of each PEM electrolytic reactor is connected with the water tank through a pure water outlet rectifying row; all the components are integrally installed on a device frame, and an exhaust fan and a water collecting tank are further arranged on the device frame. The device has the advantages that the electrolytic stacks are arranged in parallel, the branches are independently regulated and controlled and do not influence one another, hydrogen and oxygen are prevented from being mixed, and the testing efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of PEM water electrolysis hydrogen production, and in particular to a multi-channel and multi-specification PEM electrolysis stack operation test platform device. Background Art

[0002] Compared with energy sources such as coal and natural gas, hydrogen energy will become an important carrier for building a low-carbon society in the future because of its advantages such as green and pollution-free, high energy density, low operation and maintenance costs, and long-term storage. Hydrogen mainly comes from electrolysis of water as raw material. PEM electrolysis of water to produce hydrogen is an efficient and clean hydrogen production technology with simple process, high hydrogen purity and fast response speed. However, the electrolytic stack test device on the existing market can only meet the test of a single electrolyzer or a single-specification electrolytic stack test. The test mode is simple and the response is slow. These shortcomings increase the operation and maintenance costs. Therefore, it is urgent to develop a stable electrolytic stack device that can test multiple channels and specifications. When the PEM electrolytic stack is producing hydrogen, there will be a certain amount of wastewater on the operating table, which will cause pipeline corrosion and even cause electrical hazards. Long-term operation will be a safety hazard to the operating table. Utility Model Content

[0003] The purpose of the utility model is to address the technical problems existing in the existing PEM electrolysis stack testing devices on the market, and based on the specific working conditions of hydrogen production, provide a highly integrated multi-channel and multi-specification PEM electrolysis stack operation test platform device to realize electrolysis stack testing of various specifications.

[0004] In order to solve the above technical problems, the utility model provides a multi-channel and multi-specification PEM electrolytic stack operation test platform device, which is characterized in that: a liquid level flowmeter 2 is connected to the water tank 1, a drain pipe 4 and a water inlet pipe 5 are connected to the water tank 1, wherein the drain pipe 4 is externally connected to a water treatment pipeline of the installation environment, the water inlet pipe 5 is connected to an ultrapure water machine, an oxygen discharge pipeline is provided on the upper part of the water tank 1, an oxygen valve 12 is provided in the oxygen discharge pipeline, and a conductivity meter 29 is also provided on the water tank 1; an electromagnetic pump 3 is connected to the rear side of the water tank 1, and the water outlet of the electromagnetic pump 3 is divided into two branches, one branch is connected to the purification column 26 through the second valve 28, and then connected to the electric heater 13, and the other branch is directly connected to the electric heater 13 through the first valve 27, and the water outlet of the electric heater 13 is connected to the pure water inlet rectifier The pure water inlet rectifying row 40 is respectively equipped with a flow back pressure valve 6, a flow sensor 15, a first explosion-proof pressure sensor 16 and a hydrogen side temperature sensor 18 at each outlet, and then connected to the water inlet 32 ​​of each PEM electrolytic stack 39 respectively. The hydrogen outlet 34 of each PEM electrolytic stack 39 is connected to the hydrogen condenser 9 through the hydrogen rectifying row 17. The gas phase outlet of the hydrogen condenser 9 is sequentially connected to the condenser 11, the hydrogen side one-way valve 21, the hydrogen flowmeter 23, the second explosion-proof pressure sensor 22 and the hydrogen outlet valve 19. The liquid phase outlet of the hydrogen condenser 9 is connected to the water tank 1 through a small electromagnetic valve 37. The water outlet 31 of each PEM electrolytic stack 39 is connected to the water tank 1 through the pure water outlet rectifying row 7; at the same time, each water outlet 31 is provided with an oxygen side temperature sensor 14;

[0005] All the above components are integrated and installed on the device frame 38, and the device frame 38 is also provided with an exhaust fan 10 and a water collecting tank 8.

[0006] Furthermore, a heating plate is provided on the water tank 1 .

[0007] Furthermore, a condenser 11 is provided above the hydrogen condenser 9 .

[0008] Furthermore, a water return branch is provided between the outlet of the electric heater 13 and the water tank 1 , and a branch main switch 30 is provided in the water return branch.

[0009] Furthermore, a nitrogen inlet valve 20 is provided at the gas phase outlet of the hydrogen condenser 9 .

[0010] The beneficial effects of the utility model are: each electrolytic stack is set in parallel, each branch is independently regulated, and does not affect each other, so as to avoid the mixing of hydrogen and oxygen and improve the test efficiency. It has the following characteristics: (1) high integration, clear structure, easy operation, integrated display and operation area, more convenient and intuitive operation, clear display interface, able to achieve coordinated control of multiple modules, the water tank can also be used as an oxygen tank, no need to add an oxygen tank; (2) wide range of applications, not only meet the working condition test of 80℃ and above, but also realize multi-channel performance test of PEM electrolytic stacks of different specifications; (3) the operating table is equipped with a special water collection tank to prevent water from overflowing into the cabinet when replacing equipment and damaging the equipment inside; (4) the branch main switch is set to short-circuit the water tank inlet and outlet to avoid damage to the equipment due to abnormal pressure of the PEM electrolytic stack, thereby improving the safety performance of the device. (5) The temperature and pressure sensors used in the operating device are explosion-proof sensors, which meet national standards and improve the stability and safety of the equipment.

[0011] The invention will be further described below in conjunction with the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 A schematic diagram of the structure of a multi-channel and multi-specification PEM water electrolysis hydrogen production test device from one perspective provided in an embodiment of the utility model;

[0013] Figure 2-4 Structural schematic diagrams of the multi-channel and multi-specification PEM water electrolysis hydrogen production test device provided by the new embodiment from three other perspectives;

[0014] Figure 5 This is a flow chart of one embodiment of the multi-channel and multi-specification PEM water electrolysis hydrogen production testing device provided by the utility model.

[0015] Description of the drawings: water tank-1, liquid level flow meter-2, electromagnetic pump-3, drain pipe-4, water inlet pipe-5, flow back pressure valve-6, pure water outlet rectifier row-7, water collecting tank-8, hydrogen condenser-9, exhaust fan-10, condenser-11, oxygen valve-12, electric heater-13, oxygen side temperature sensor-14, flow sensor-15, first explosion-proof pressure sensor-16, hydrogen rectifier row-17, hydrogen side temperature sensor-18, hydrogen valve-19, nitrogen valve-20, Hydrogen side check valve -21, second explosion-proof pressure sensor -22, hydrogen flowmeter -23, nitrogen side check valve -24, control panel -25, purification column -26, first valve -27, second valve -28, conductivity meter -29, branch main switch -30, water outlet -31, water inlet -32, main power supply -33, hydrogen discharge port -34, flowmeter -35, power supply -36, small solenoid valve -37, frame -38, PEM electrolysis stack -39, pure water inlet rectifier row -40. DETAILED DESCRIPTION

[0016] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, and to enable people in the technical field to understand the present invention more specifically, the specific implementation of the present invention is now described in detail with reference to the accompanying drawings. The specific implementation case described in this section is only used to explain the embodiment, not all embodiments, and the description includes but is not limited to the present invention.

[0017] The utility model is further explained with reference to the accompanying drawings and specific implementation cases.

[0018] The multi-channel and multi-specification PEM water electrolysis hydrogen production test device described in this embodiment is a four-channel PEM water electrolysis hydrogen production test device, and each channel can be equipped with a PEM electrolysis stack of different specifications and tested.

[0019] like Figure 1 The figure shows a schematic structural diagram of a multi-channel and multi-specification PEM water electrolysis hydrogen production test device from one perspective provided by an embodiment of the utility model, including: a device frame module, a water tank circulation control module, a PEM electrolysis stack hydrogen production module, a gas-liquid separation module, a water purification module and a control module.

[0020] like Figure 1-5 As shown, the multi-channel and multi-specification PEM water electrolysis hydrogen production test device provided in this embodiment is a four-channel electrolytic stack test device, and each channel can test the same or different specifications of electrolytic stacks, wherein:

[0021] The device frame module serves as the skeleton and shell of the entire PEM water electrolysis hydrogen production test device, and includes a device frame 38, an exhaust fan 10, a water collection tank 8, a plurality of external pipes, an oxygen valve-12, a hydrogen valve-19, a nitrogen valve-20, etc.; the device frame module includes a device frame, a test table, a control panel, a heat dissipation device and a plurality of external pipes. The operation test table can be used to be placed on a plurality of electrolyzers. The test control panel includes a simplified flow chart of the entire device and various important related parameters. The related parameters include the temperature and flow rate of the inlet and outlet of each module and the real-time display of the conductivity of the electrolyzer inlet water. The heat dissipation device includes an exhaust port. The plurality of external pipes include a water inlet pipe, a hydrogen outlet pipe, a drainage pipe, and a nitrogen replacement pipe.

[0022] The water collection tank 8 can collect and drain the water leaking during the disassembly and assembly of the table test equipment to prevent the water from overflowing into the cabinet and damaging the equipment; the exhaust fan 10 can prevent the internal components from overheating and can discharge the heat in time to ensure the safe operation of the device.

[0023] Water tank circulation control module The water tank circulation control module provides pure water for electrolysis for the entire device. The water tank circulation control module includes a liquid level control device, a temperature adjustment device, a flow adjustment device, and a water quality control device. The online liquid level control device includes a liquid level flowmeter 2, and the water tank temperature adjustment device includes an electric heater 13, a heating plate, etc. The water tank flow adjustment device includes a flow back pressure valve 6 and a liquid level flowmeter 2. The water tank circulating water quality control device includes a conductivity meter 29; the multi-channel and multi-specification PEM water electrolysis hydrogen production test device described in this embodiment, wherein the water tank circulation control module includes a water tank 1, a flowmeter 35, a liquid level flowmeter 2, an electromagnetic pump 3, an electric heater 13, a first valve 27 and a second valve 28, etc.; pure water prepared by an ultrapure water machine is connected to the water tank water replenishment valve, and the liquid level is displayed on the outside of the water tank by a flowmeter. Secondly, a heating plate is attached to the outside of the water tank to prevent the water tank from dissipating heat, and the water outlet of the water tank is connected with a water outlet valve and a flow back pressure valve in sequence.

[0024] The PEM electrolysis stack hydrogen production module includes a water inlet 32, a water outlet 31, a hydrogen outlet 34, a power supply 36 system, and a plurality of PEM electrolysis stacks 39, a power supply module 36, a flow back pressure valve 6, a temperature detection device, etc.;

[0025] When the PEM electrolysis stack hydrogen production module is powered on, water is electrolyzed into hydrogen and oxygen and the two gases enter the gas-liquid separation unit respectively.

[0026] The gas-liquid separation module includes a hydrogen-side gas-liquid separation module and an oxygen-side gas-liquid separation module. The hydrogen-side gas-liquid separation module is arranged on the hydrogen side, including a hydrogen condenser 9, a condenser 11, an explosion-proof temperature sensor, a pressure sensor and a one-way oxygen valve 12; the oxygen-side gas-liquid separation module includes an oxygen-containing water vapor outlet 31 of a PEM electrolysis stack, a pure water outlet rectifying row 7, etc. The oxygen-containing water vapor outlet 31 of each PEM electrolysis stack converges at the pure water outlet rectifying row 7, and then flows back to the water tank 1. After passing through the water tank 1, the oxygen is directly discharged from the oxygen valve 12. The water tank 1 can also be used as an oxygen tank to discharge the oxygen from the oxygen valve 12. The water tank kills two birds with one stone, replaces the oxygen tank, and achieves high integration.

[0027] The water purification module purifies water so that the pure water entering the electrolytic stack reaches a qualified conductivity. It includes a purification column 26 and a first purification control valve 27, a second valve 28, etc.; the purification column 26 is composed of a stainless steel shell and a purification resin, and flanges are connected at both ends to ensure airtightness. The filter is sintered by metal titanium, and the conductivity of the purified water reaches the required standard; currently most test platforms heat the pure water first and then purify it before entering the electrolytic stack. Since the purification resin is easily melted at high temperatures, the disadvantage of this type of device is that it can only test the working conditions of 70-80°C. In this embodiment, before the pure water is heated and enters the electrolytic stack, the valve can be controlled to select whether to purify the water and then heat it. This can overcome the difficulty of not being able to test at high temperatures, and can achieve testing at temperatures of 80°C and above, with a wider test range.

[0028] The control module realizes equipment communication with each electrical component in other modules. It includes a control panel 25, a PLC controller, a main power supply 33, etc. The control module realizes equipment communication with each electrical component in the water tank circulation control module, the PEM electrolysis stack hydrogen production module, the gas-liquid separation module, and the water purification module. The control panel 25 displays the key parameters of each interface in real time to realize online adjustment.

[0029] See attached Figure 5In this embodiment, the water tank 1 is connected to a liquid level flow meter 2, which can monitor the water flow in and out of the water tank 1 in real time and output signals. In addition, the liquid level flow meter 2 can also monitor the water level in the water tank 1, and can decide whether to replenish water in the water tank 1 in time according to the water level display. The water tank 1 is connected to a drain pipe 4 and a water inlet pipe 5, wherein the drain pipe 4 is externally connected to a water treatment pipeline of the installation environment, or the drain pipe 4 is externally connected to a sewer; the water inlet pipe 5 is connected to an ultrapure water machine for replenishing water to the water tank 1. An oxygen discharge pipeline is provided at the top of the water tank 1, in which an oxygen valve 12 is provided, and a conductivity meter 29 is also provided on the water tank 1; an electromagnetic pump 3 is connected to the rear side of the water tank 1, and the water outlet of the electromagnetic pump 3 is divided into two branches, one branch is connected to the purification column 26 through the second valve 28, and then connected to the electric heater 13, and the other branch is directly connected to the electric heater 13 through the first valve 27, the second valve 28 is closed and the first valve 27 is opened at the same time, and the pure water in the device enters the electric heater 13 through the pipeline, and the pure water can be heated; the second valve 28 is opened and the first valve 27 is closed at the same time, and the pure water in the device enters the electric heater 13 after passing through the purification column 26, and the pure water can be purified and heated; the water outlet of the electric heater 13 is connected to the pure water inlet rectifying row 40, and the pure Each outlet of the water inlet rectifying row 40 is respectively installed with a flow back pressure valve 6, a flow sensor 15, a first explosion-proof pressure sensor 16 and a hydrogen side temperature sensor 18, and then is respectively connected to the water inlet 32 ​​of each PEM electrolytic stack 39, and the hydrogen outlet 34 of each PEM electrolytic stack 39 is connected to the hydrogen condenser 9 through the hydrogen rectifying row 17, and the gas phase outlet of the hydrogen condenser 9 is sequentially connected with the condenser 11, the hydrogen side one-way valve 21, the hydrogen flowmeter 23, the second explosion-proof pressure sensor 22 and the hydrogen outlet valve 19, and the liquid phase outlet of the hydrogen condenser 9 is connected to the water tank 1 through the small solenoid valve 37; the water outlet 31 of each PEM electrolytic stack 39 is connected to the water tank 1 through the pure water outlet rectifying row 7; at the same time, each water outlet 31 is provided with an oxygen side temperature sensor 14.

[0030] Each of the PEM electrolytic stacks 39 is equipped with a corresponding power supply 36 to provide energy for the corresponding PEM electrolytic stack 39 .

[0031] The multi-channel and multi-specification PEM water electrolysis hydrogen production test device described in this embodiment also includes a nitrogen replacement pipeline. When the device is not in operation for a long time, nitrogen is used to replace the gas in the pipeline to protect the device pipeline system and avoid corrosion. In the nitrogen replacement pipeline, nitrogen is connected to the device at the nitrogen inlet valve 20. In this embodiment, the nitrogen inlet valve 20 is arranged at the gas phase outlet of the hydrogen condenser 9, and then passes through the nitrogen check valve 24, the hydrogen rectifier row 17, the electrolytic stack 39, and then passes through the pure water inlet rectifier row 40, the electric heater 13, and the electromagnetic pump 3 to reach the water tank 1. Nitrogen replaces the gas in the device, so that the entire device is filled with nitrogen to ensure that the device is not corroded.

[0032] The specific working process of the test system provided in this embodiment is as follows:

[0033] During the use of the water tank circulation control module and the water purification module, ultrapure water produced by the ultrapure water machine enters the water tank 1 through the water inlet pipe 5. The water volume in the water tank 1 can be displayed in real time by the liquid level flowmeter 2, and the specific water volume can be displayed by the flowmeter 35. The control module monitors and decides whether to perform water replenishment operation. The water temperature of the water tank is controlled by the electric heater 13. When the temperature is too low, the pure water in the water tank 1 is heated; before the water tank is replenished with water, all devices are shut down, the electrolytic stack 39 stops being powered on, and the electric heater 13 stops heating. After the water level is qualified, check whether the conductivity shown on the conductivity meter 29 meets the requirements, and then start the machine for testing. The flow control of the water tank 1 is regulated by the electromagnetic pump 3 and the flow back pressure valve 6 in several channels. The total flow is regulated by controlling the frequency of the electromagnetic pump 3, and the pure water flow in different channels can be controlled by adjusting the branch back pressure valve 6. The water quality of the water tank is displayed by the conductivity meter 29 in real time, and the control module determines whether the water quality meets the requirements. When the conductivity is abnormal, the pure water is regulated by closing the first valve 27 and opening the second valve 28 to pass through the purification column 26 for purification. After the conductivity of the pure water meets the qualified requirements, it enters each PEM electrolytic stack 39 to ensure that the water quality meets the required standards.

[0034] In addition, if you want to test the temperature of 80°C or above, close the first valve 27 in advance to purify the pure water. After the conductivity meter 29 shows that it meets the standard, open the first valve 27 and close the second valve 28 to achieve the working condition test under high temperature.

[0035] In the PEM electrolytic stack hydrogen production module and the gas-liquid separation module, the water flow in each channel is controlled by the flow back pressure valve 6, and passes through the flow sensor 15, the first explosion-proof pressure sensor 16 and the hydrogen side temperature sensor 18 in sequence, and then enters the PEM electrolytic stack 39 to be powered on to produce hydrogen. The hydrogen passes through the hydrogen discharge port 34 and is collected by the hydrogen rectifier row 17 to enter the hydrogen condenser 9. The upper condenser 11 plays a secondary condensation role, effectively condensing the water vapor carried in the hydrogen. When the condensed water reaches a sufficient amount, it is discharged from the lower part of the hydrogen condenser 9 through the solenoid valve 37 into the water tank 1; the hydrogen is discharged through the hydrogen side one-way valve 21, and a second explosion-proof pressure sensor 22 is provided at the outlet. The hydrogen production pressure is monitored in real time through the control module to prevent accidents. The hydrogen flowmeter 23 can evaluate the hydrogen production performance through the control module.

[0036] In this embodiment, a liquid level flow meter 2 is provided in the water tank 1, which can be used by the control module to monitor the water volume in real time. When the liquid level is found to be too low or too high, the water inlet pipe 5 or the drain pipe 4 can be opened to adjust the liquid level in the water tank 1 to ensure an appropriate amount of water. At the same time, the control module can monitor the temperature of the water tank 1 in real time. When the temperature is too high, the control module will activate the alarm device and the protection device, stop heating, and inject pure water to cool it down in time.

[0037] In this embodiment, a heating plate is also attached to the surface of the water tank 1. When the external environment temperature is too low, the heating plate can be started to effectively prevent heat dissipation; when the control module detects that the water quality does not meet the electrolysis standard, it will promptly alarm and cut off the power supply, drain the water with unqualified water quality in the water tank 1 through the drain pipe 4, and refill the water through the water inlet pipe 5. After the conductivity meter 29 shows that the water quality meets the requirements, the power supply can be restored and the experiment can be carried out. A return water branch is provided between the outlet of the electric heater 13 and the water tank 1, and a branch main switch 30 is provided in the return water branch. By adjusting the branch main switch 30, not only the total flow rate can be controlled, but also the safety problem caused by the abnormal increase of the pipeline pressure of the PEM electrolytic stack 39 can be avoided.

[0038] The control module of this embodiment can realize online monitoring of several inlet and outlet temperatures, pressures, and flows of the water tank 1 and each PEM electrolytic stack 39. The display panel 25 is independently designed and equipped with a special alarm device. The flow back pressure valve 6 is used to control the flow of each channel. The sensors used are explosion-proof temperature sensors and explosion-proof pressure sensors that comply with national electrical explosion-proof standards, which effectively ensure the safety performance of the device.

[0039] The gas-liquid separation module and the hydrogen condenser 9 are externally connected to the condenser 11, which can effectively condense the water carried by the hydrogen produced by water electrolysis. After a certain amount of water is accumulated, it is discharged into the water tank 1 through the small electromagnetic valve 37 pump to complete the water circulation; the drain pipe 4 of the water tank 1 can also be used as a sampling port to perform online real-time sampling and analysis of water, so as to grasp the performance changes of pure water in the electrolytic stack in real time and make adjustments accordingly.

[0040] The frame module includes several external piping devices, which include nitrogen replacement pipelines. Before or after the operation of the device, nitrogen is introduced to replace the air in the device to prevent accidents and improve the safety performance of the device. A one-way safety valve is placed in front of the hydrogen outlet valve. When the pressure is insufficient, the one-way safety valve automatically closes. When the pressure exceeds the set value, the one-way safety valve automatically opens to discharge hydrogen to ensure smooth operation of the device.

[0041] The utility model provides a multi-channel and multi-specification PEM electrolytic stack operation test platform device, which realizes multi-channel and multi-specification electrolytic stack performance testing, and is equipped with nitrogen replacement pipelines, explosion-proof sensors and one-way safety valves to ensure the safety of the device; the adopted water tank kills two birds with one stone, and also acts as an oxygen tank as an oxygen-side gas-liquid separator, thereby achieving high integration; the set purification branch control valve realizes temperature condition testing in a wider range; the setting of the heat sink prevents heat dissipation due to excessively cold environment, thereby ensuring stable temperature; the separately set branch main switch can avoid abnormal increase in device pipeline pressure, thereby improving the safety of the device; the matching control unit can effectively control the water flow and temperature of each unit and issue reminder alarms to units that do not meet the conditions, thereby effectively improving the efficiency of the test and reducing enterprise costs.

[0042] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific embodiments, which are only illustrative and not restrictive. The scope of protection of the present utility model shall be subject to the scope defined in the claims. For relevant technical personnel engaged in this field, under the enlightenment of this new invention, the form of the invention that is modified and improved without departing from the scope of protection of the claims of the present invention still belongs to the protection scope of the present invention.

Claims

1. A multi-channel and multi-specification PEM electrolysis stack operation test platform device, characterized in that: The water tank (1) is connected to a liquid level flow meter (2), a drain pipe (4) and a water inlet pipe (5), wherein the drain pipe (4) is externally connected to a water treatment pipeline of an installation environment, and the water inlet pipe (5) is connected to an ultrapure water machine. An oxygen discharge pipeline is provided at the top of the water tank (1), and an oxygen valve (12) is provided in the oxygen discharge pipeline. The water tank (1) is also provided with a conductivity meter (29). The rear side of the water tank (1) is connected to an electromagnetic pump (3), and the water outlet of the electromagnetic pump (3) is divided into two branches, one branch is connected to a purification column (26) through a second valve (28), and then connected to an electric heater (13), and the other branch is directly connected to the electric heater (13) through a first valve (27), and the water outlet of the electric heater (13) is connected to a pure water inlet rectifying row (40), and each outlet of the pure water inlet rectifying row (40) is respectively provided with a flow back pressure regulator. A valve (6), a flow sensor (15), a first explosion-proof pressure sensor (16) and a hydrogen side temperature sensor (18) are connected to the water inlet (32) of each PEM electrolytic stack (39) respectively. The hydrogen outlet (34) of each PEM electrolytic stack (39) is connected to the hydrogen condenser (9) through a hydrogen rectifying row (17). The gas phase outlet of the hydrogen condenser (9) is connected to a condenser (11), a hydrogen side one-way valve (21), a hydrogen flow meter (23), a second explosion-proof pressure sensor (22) and a hydrogen outlet valve (19) in sequence. The liquid phase outlet of the hydrogen condenser (9) is connected to the water tank (1) through a small electromagnetic valve (37). The water outlet (31) of each PEM electrolytic stack (39) is connected to the water tank (1) through a pure water outlet rectifying row (7); at the same time, each water outlet (31) is provided with an oxygen side temperature sensor (14); All the above-mentioned components are integrated and installed on a device frame (38), and the device frame (38) is also provided with an exhaust fan (10) and a water collecting tank (8).

2. A multi-channel and multi-specification PEM electrolysis stack operation test platform device according to claim 1, characterized in that: The water tank (1) is provided with a heating plate.

3. A multi-channel and multi-specification PEM electrolysis stack operation test platform device according to claim 1, characterized in that: A condenser (11) is provided above the hydrogen condenser (9).

4. A multi-channel and multi-specification PEM electrolysis stack operation test platform device according to claim 1, characterized in that: A water return branch is provided between the outlet of the electric heater (13) and the water tank (1), and a branch main switch (30) is provided in the water return branch.

5. The multi-channel and multi-specification PEM electrolysis stack operation test platform device according to claim 1, characterized in that: The nitrogen inlet valve (20) is arranged at the gas phase outlet of the hydrogen condenser (9).

Images