A PEM water electrolysis hydrogen production integrated device

Abstract

The utility model discloses a PEM water electrolysis hydrogen production integrated device, including: a mounting frame; a water purifier, mounted on a frame at the top of the mounting frame, whose water inlet is connected to a tap water pipe provided with a water inlet solenoid valve through a pipeline; the water inlet of the water purifier is connected to a pure water tank through a pipeline; an ultrapure water purification column, whose inlet end is connected to the water outlet of the pure water tank through a pipeline provided with a circulating pump; a PEM water electrolyzer, mounted at the bottom of the mounting frame, whose liquid inlet is connected to the outlet end of the ultrapure water purification column through a pipeline, and whose liquid outlet is connected to the pure water tank through a pipeline; a gas-liquid separator, vertically mounted at the bottom of the mounting frame, whose hydrogen pipeline is introduced into the gas inlet end of the gas-liquid separator, whose liquid outlet end of the gas-liquid separator is connected to the pure water tank through a pipeline provided with a solenoid valve, and whose gas outlet end of the gas-liquid separator is connected to a hydrogen storage tank through a pipeline. The device of the present application integrates water electrolysis hydrogen production reaction and separation, has a high energy conversion efficiency, and is suitable for water electrolysis hydrogen production processes in multiple scenarios.

Description

Technical Field

[0001] The utility model relates to the technical field of PEM water electrolysis hydrogen production, in particular to a PEM water electrolysis hydrogen production integrated device. Background Art

[0002] Water electrolysis hydrogen production technology has gradually come into people's view. Proton exchange membrane (PEM) water electrolysis hydrogen production is one of the mature hydrogen production technologies. The prepared hydrogen has high purity (above 99.99%) and is easy to transport. It can be directly used as fuel, carrier gas, reducing or protective gas, and cooling medium.

[0003] This application aims to use PEM water electrolysis hydrogen production technology to develop a method that converts surplus electrical energy into hydrogen and stores the generated gas in a natural gas pipeline network or natural gas storage equipment. When there is a power shortage, the stored gas can be converted back into electrical energy or thermal energy to provide to users, thereby improving the ability of the integrated energy system to absorb renewable energy. Utility Model Content

[0004] The technical problem to be solved by this application is how to use PEM water electrolysis hydrogen production technology to achieve gas-to-electricity conversion.

[0005] In order to solve the above technical problems, the present application provides a PEM water electrolysis hydrogen production integrated device, including: an installation frame, used to fix the instruments and equipment of the entire water electrolysis hydrogen production integrated device; a water purifier, fixedly installed on the frame at the top of the installation frame, the water inlet of the water purifier is connected to the tap water pipeline through a pipeline, and the pipeline is provided with a water inlet solenoid valve; the water inlet of the water purifier is connected to the pure water tank on the frame at the bottom of the installation frame through a pipeline; an ultrapure water purification column, the inlet end of which is connected to the water outlet of the pure water tank through a pipeline provided with a circulating pump; the ultrapure water purification column is fixedly installed on the side frame of the installation frame; a PEM water electrolyzer, fixedly installed on the frame at the bottom of the installation frame, and the liquid inlet of the PEM water electrolyzer is connected to the water outlet of the pure water tank through a pipeline. The outlet end of the ultrapure water purification column and the liquid outlet of the PEM water electrolyzer are connected to the pure water tank through a pipeline; the gas-liquid separator is vertically installed on the frame at the bottom of the installation frame, the hydrogen pipeline of the PEM water electrolyzer is introduced into the gas inlet end of the gas-liquid separator, the liquid outlet end of the gas-liquid separator is connected to the pure water tank through a pipeline equipped with a solenoid valve, and the gas outlet end of the gas-liquid separator is connected to the hydrogen storage tank through a pipeline; wherein, the water purifier purifies the tap water input from the tap water pipeline and then introduces it into the pure water tank through a circulating pump, the outlet water of the pure water tank enters the PEM water electrolyzer after being processed by the ultrapure water purification column, the hydrogen and water mixture obtained by the PEM water electrolyzer is introduced into the gas-liquid separator through a pipeline, the gas outlet end of the gas-liquid separator leads to the hydrogen storage tank, and the liquid outlet end leads to the pure water tank.

[0006] According to an embodiment of the present application, a PEM water electrolyzer includes a cathode plate, an anode plate, a membrane electrode assembly, a cathode current collector, and an anode current collector.

[0007] According to an embodiment of the present application, a membrane electrode assembly includes a non-gas-permeable membrane with highly active catalyst particles attached thereto.

[0008] According to the embodiment of the present application, the cell body of the PEM water electrolyzer is provided with a water inlet pipeline interface, an oxygen pipeline interface and a hydrogen pipeline interface connected to a liquid inlet, an oxygen outlet and a hydrogen outlet.

[0009] According to an embodiment of the present application, the water inlet pipeline interface is arranged on the lower side of the cell body of the PEM water electrolyzer, and the oxygen pipeline interface and the hydrogen pipeline interface are arranged on the upper side of the cell body of the PEM water electrolyzer.

[0010] According to the embodiments of the present application, the liquid inlet, oxygen outlet and hydrogen outlet are all provided with plug tubes protruding from the surface of the anode plate or the cathode plate, and the water inlet pipe interface, oxygen pipe interface and hydrogen pipe interface are all provided with connector pipes that are plugged into and matched with the plug tubes during installation.

[0011] According to an embodiment of the present application, a dryer, a micro-oxygen inspection instrument and a leak point instrument are sequentially provided on the connecting pipeline between the gas outlet end of the gas-liquid separator and the hydrogen storage tank.

[0012] According to an embodiment of the present application, a radiator is further provided on the connecting pipeline between the circulation pump and the ultrapure water purification column, and the radiator is installed on the upper side of the installation frame using a mounting bracket.

[0013] According to an embodiment of the present application, the installation frame is a frame made of stainless steel.

[0014] According to an embodiment of the present application, further, the PEM water electrolysis hydrogen production integrated device can also be connected to a PLC controller.

[0015] Compared with the prior art, the technical solution of the present application has the following beneficial effects:

[0016] 1. The utility model integrates a water purification device, a PEM water electrolyzer and a gas-liquid separator in an installation frame, so that the pure water electrolysis hydrogen production technology (PEM) integrates reaction and separation, and has a high energy conversion efficiency; a modular assembly structure is adopted in the installation frame, and the water purification device, the PEM water electrolyzer and the gas-liquid separator are easily installed in the installation frame, with high integration, small size, and a wide range of application scenarios.

[0017] 2. Each instrument and equipment unit in the integrated device for producing hydrogen by PEM water electrolysis of the utility model is easy to disassemble and assemble, and is more convenient to maintain than a conventional water electrolysis hydrogen production system.

[0018] 3. The utility model's reclaimed water purification device, PEM water electrolyzer and gas-liquid separator form a circulation system through the design of pipelines, which fully utilizes water resources, improves the utilization rate of comprehensive energy and reduces costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present application, rather than limiting the present application.

[0020] Figure 1 A schematic diagram of the structure of an embodiment of the utility model;

[0021] Figure 2 The figure is a schematic structural diagram of another embodiment of the present utility model.

[0022] The following are the descriptions of the reference numerals:

[0023] 1. Installation frame, 11. Water purifier, 12. Pure water tank, 13. Ultrapure water purification column, 14. Water inlet solenoid valve, 15. Circulation pump, 16. Radiator, 20. PEM water electrolyzer, 30. Gas-liquid separator, 31. Leakage point meter, 32. Dryer, 311. Hydrogen outlet. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the embodiment of the present application clearer, the technical scheme of the embodiment of the present application will be clearly and completely described in conjunction with the drawings of the embodiment of the present application. Obviously, the described embodiment is a part of the embodiment of the present application, not all of the embodiments. Based on the described embodiment of the present application, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of this application.

[0025] Unless otherwise defined, the technical or scientific terms used herein shall have the common meanings understood by persons with ordinary skills in the field to which this application belongs. The words "first", "second" and similar words used in the patent application specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "an" do not indicate a quantity limitation, but indicate the existence of at least one.

[0026] according to Figure 1 and Figure 2As shown, a PEM water electrolysis hydrogen production integrated device exemplified in the utility model includes an installation frame 1 and a water purifier 11, an ultrapure water purification column 13, a PEM water electrolyzer 20 and a gas-liquid separator 30 fixedly installed in the installation frame 1, etc. These equipments and instruments are connected by pipelines and valves, wherein the water purifier 11 purifies the tap water input from the tap water pipeline and introduces it into the pure water tank 12 through a circulation pump 15, and the outlet water of the pure water tank 12 enters the PEM water electrolyzer 20 after being treated by the ultrapure water purification column 13, and the hydrogen and water mixture obtained by the treatment of the PEM water electrolyzer 20 is introduced into the gas-liquid separator 30 through a pipeline, and the gas outlet end of the gas-liquid separator 30 leads to the hydrogen storage tank, and the liquid outlet end leads to the pure water tank 12. This application breaks through the difficulties of multi-disciplinary intersection, multi-system integration, and multi-professional cooperation of comprehensive energy, and builds a regional multi-energy microgrid integration test platform that can realize gas-electricity conversion.

[0027] In this embodiment, the mounting frame 1 is used to fix the instruments and equipment of the entire integrated device for producing hydrogen by water electrolysis.

[0028] Furthermore, four supporting feet or four universal wheels may be installed at the bottom of the mounting frame 1 .

[0029] Furthermore, the installation frame is a frame made of stainless steel material, which can be welded from stainless steel pipes and is rust-proof and corrosion-resistant.

[0030] In this embodiment, the water purifier 11 is fixedly mounted on the frame at the top of the mounting frame 1, and the water inlet of the water purifier 11 is connected to the tap water pipe through a pipeline, on which a water inlet solenoid valve 14 is provided; the water inlet of the water purifier 11 is connected to the pure water tank 12 on the frame at the bottom of the mounting frame 1 through a pipeline.

[0031] Furthermore, the water inlet solenoid valve 14 can be connected to a PLC controller, and the PLC controller can be remotely controlled by a program on a remote control terminal.

[0032] Furthermore, the tap water pipeline may be a municipal water supply pipeline or an enterprise water supply pipeline.

[0033] Furthermore, the water purifier 11 is fixed to the frame on the top of the mounting frame 1 by means of bolts.

[0034] In this embodiment, the inlet end of the ultrapure water purification column 13 is connected to the water outlet of the pure water tank 12 through a pipeline provided with a circulation pump 15; the ultrapure water purification column 13 is fixedly mounted on the side frame of the mounting frame 1.

[0035] Furthermore, a plurality of fixing rings are provided on the installation frame 1 , and the ultrapure water purification column 13 is transversely fixed in the fixing rings and is located on the side of the installation frame 1 .

[0036] Furthermore, a radiator 16 is provided on the connection pipeline between the circulation pump 15 and the ultrapure water purification column 13 to ensure the temperature of the pure water entering the water electrolyzer, and the radiator 16 is installed on the upper side of the installation frame 1 using a mounting bracket. Through the pressurization of the circulation pump 15, the pure water flows into the radiator 16 and then enters the ultrapure water purification column 13.

[0037] In this embodiment, the PEM water electrolyzer 20 is fixedly mounted on a frame at the bottom of the mounting frame 1, the liquid inlet of the PEM water electrolyzer 20 is connected to the outlet end of the ultrapure water purification column 13 through a pipeline, and the liquid outlet of the PEM water electrolyzer 20 is connected to the pure water tank 12 through a pipeline.

[0038] Specifically, the PEM water electrolyzer 20 is the core of the hydrogen production system. The PEM water electrolyzer 20 includes a cathode plate, an anode plate, a membrane electrode assembly, a cathode current collector and an anode current collector. Among them, the cathode and anode plates support the current collector and the membrane electrode, transfer electrons and provide channels for the flow of substances. The cathode and anode current collectors distribute the current evenly to the membrane electrode and are also channels for the flow of substances. The core component of the electrolyzer, the membrane electrode assembly, directly attaches highly active catalyst particles to the membrane to form a non-permeable diaphragm that can withstand a large pressure difference, and the proton membrane has a selective separation effect, so that the pure water electrolysis hydrogen production technology (PEM) integrates reaction and separation, and has a very high energy conversion efficiency.

[0039] Furthermore, the cell body of the PEM water electrolyzer 20 is provided with a water inlet pipeline interface, an oxygen pipeline interface and a hydrogen pipeline interface connected to the liquid inlet, the oxygen outlet and the hydrogen outlet; the water inlet pipeline interface is arranged on the lower side of the cell body of the PEM water electrolyzer 20, and the oxygen pipeline interface and the hydrogen pipeline interface are arranged on the upper side of the cell body of the PEM water electrolyzer 20; the liquid inlet, the oxygen outlet and the hydrogen outlet are all provided with plug tubes protruding from the surface of the anode plate or the cathode plate, and the water inlet pipeline interface, the oxygen pipeline interface and the hydrogen pipeline interface are all provided with a joint pipe that is plugged into and matched with the plug pipe during installation.

[0040] In this embodiment, the gas-liquid separator 30 is vertically mounted on the frame at the bottom of the mounting frame 1 and is located inside the mounting frame 1; the hydrogen pipeline connected to the hydrogen outlet of the PEM water electrolyzer 20 is introduced into the gas inlet end of the gas-liquid separator 30, the liquid outlet end of the gas-liquid separator 30 is connected to the pure water tank 12 through a pipeline provided with a solenoid valve, and the gas outlet end of the gas-liquid separator 30 is connected to the hydrogen storage tank through a pipeline.

[0041] Furthermore, a dryer 32, a micro-oxygen inspection instrument and a leak detector 31 are sequentially provided on the connection pipeline between the gas outlet of the gas-liquid separator 30 and the hydrogen storage tank, and the hydrogen outlet 311 on the leak detector 31 is connected to the hydrogen storage tank through a pipeline (not shown in the figure). The dryer 32 is filled with a molecular sieve with excellent water absorption performance. The hydrogen flows through the molecular sieve bed, and the saturated water in the hydrogen is adsorbed by the molecular sieve, and the high-purity hydrogen flows out of the dryer 32. The leak detector 31 is used to detect gas leakage points to ensure the safety of the hydrogen pipeline.

[0042] Furthermore, the PEM water electrolysis hydrogen production integrated device can also be connected to a PLC controller. During the hydrogen production process, the PLC controller controls the electrolysis power supply of the PEM water electrolysis hydrogen production integrated device, and receives data generated during the operation of the PEM water electrolysis hydrogen production integrated device through the PLC controller, so that the hydrogen production system can operate stably under reliable control.

[0043] Furthermore, the hydrogen storage tank may be a natural gas pipeline network or a natural gas storage device.

[0044] In this embodiment, the working process of a PEM water electrolysis hydrogen production integrated device is as follows: the tap water inlet solenoid valve 14 is controlled to open by a PLC controller, and the tap water is connected to the water purifier 11, so that the system can produce self-made pure water; the pure water flows into the radiator 16 through the pressurization of the circulating pump 15, and then passes through the ultrapure water purification column 13 for further purification, and the purified water reaches the PEM water electrolyzer 20; the water is decomposed under the action of the direct current in the PEM water electrolyzer 20, and hydrogen and oxygen are precipitated on the electrode surface, and enter the gas-liquid system through their respective channels; the hydrogen and water mixture coming out of the PEM water electrolyzer 20 flows through the hydrogen channel together, flows out from the upper end of the PEM water electrolyzer 20, and is introduced into the gas-water separator after being collected, and gas-liquid separation is carried out under the action of gravity. The hydrogen side of the electrolyzer contains only a small amount of water that permeates through the proton exchange membrane. After the water gathers at the bottom of the steam-water separator to a certain height, it is controlled by the solenoid valve to return to the pure water tank 12; the water side in the PEM water electrolyzer 20 returns to the pure water tank 12 from the electrolyzer outlet pipeline together with oxygen, forming a closed-loop system to ensure continuous operation.

[0045] In summary, the technical solution of this application has the following beneficial effects:

[0046] 1. The utility model integrates a water purification device, a PEM water electrolyzer and a gas-liquid separator in an installation frame, so that the pure water electrolysis hydrogen production technology (PEM) integrates reaction and separation, and has a high energy conversion efficiency; a modular assembly structure is adopted in the installation frame, and the water purification device, the PEM water electrolyzer and the gas-liquid separator are easily installed in the installation frame, with high integration, small size, and a wide range of application scenarios.

[0047] 2. Each instrument and equipment unit in the integrated device for producing hydrogen by PEM water electrolysis of the utility model is easy to disassemble and assemble, and is more convenient to maintain than a conventional water electrolysis hydrogen production system.

[0048] 3. The utility model's reclaimed water purification device, PEM water electrolyzer and gas-liquid separator form a circulation system through the design of pipelines, which fully utilizes water resources, improves the utilization rate of comprehensive energy and reduces costs.

[0049] The above are merely exemplary embodiments of the present application and are not intended to limit the protection scope of the present application. The protection scope of the present application is determined by the appended claims.

Claims

1. A PEM water electrolysis hydrogen production integrated device, characterized in that: include: An installation frame is used to fix the instruments and equipment of the entire water electrolysis hydrogen production integrated device; A water purifier is fixedly mounted on a frame at the top of the installation frame, the water inlet of the water purifier is connected to a tap water pipeline through a pipeline, and a water inlet solenoid valve is provided on the pipeline; the water inlet of the water purifier is connected to a pure water tank on the frame at the bottom of the installation frame through a pipeline; An ultrapure water purification column, the inlet end of which is connected to the water outlet of the pure water tank through a pipeline provided with a circulation pump; the ultrapure water purification column is fixedly mounted on the side frame of the mounting frame; A PEM water electrolyzer, fixedly mounted on a frame at the bottom of the mounting frame, wherein the liquid inlet of the PEM water electrolyzer is connected to the outlet of the ultrapure water purification column through a pipeline, and the liquid outlet of the PEM water electrolyzer is connected to the pure water tank through a pipeline; A gas-liquid separator is vertically mounted on the frame at the bottom of the mounting frame, the hydrogen pipeline of the PEM water electrolyzer is introduced into the gas inlet end of the gas-liquid separator, the liquid outlet end of the gas-liquid separator is connected to the pure water tank through a pipeline provided with a solenoid valve, and the gas outlet end of the gas-liquid separator is connected to the hydrogen storage tank through a pipeline; Among them, the water purifier purifies the tap water input from the tap water pipe and then introduces it into the pure water tank through the circulation pump. The water outlet of the pure water tank enters the PEM water electrolyzer after being processed by the ultrapure water purification column. The hydrogen and water mixture obtained by the treatment of the PEM water electrolyzer is introduced into the gas-liquid separator through a pipeline. The gas outlet end of the gas-liquid separator leads to the hydrogen storage tank, and the liquid outlet end leads to the pure water tank.

2. A PEM water electrolysis hydrogen production integrated device according to claim 1, characterized in that: The PEM water electrolyzer comprises a cathode plate, an anode plate, a membrane electrode assembly, a cathode current collector and an anode current collector.

3. A PEM water electrolysis hydrogen production integrated device according to claim 2, characterized in that: The membrane electrode assembly includes a non-gas-permeable membrane with highly active catalyst particles attached.

4. A PEM water electrolysis hydrogen production integrated device according to claim 2, characterized in that: The cell body of the PEM water electrolyzer is provided with a water inlet pipeline interface, an oxygen pipeline interface and a hydrogen pipeline interface connected to a liquid inlet, an oxygen outlet and a hydrogen outlet.

5. A PEM water electrolysis hydrogen production integrated device according to claim 4, characterized in that: The water inlet pipeline interface is arranged on the lower side of the tank body of the PEM water electrolyzer, and the oxygen pipeline interface and the hydrogen pipeline interface are arranged on the upper side of the tank body of the PEM water electrolyzer.

6. A PEM water electrolysis hydrogen production integrated device according to claim 4, characterized in that: The liquid inlet, oxygen outlet and hydrogen outlet are all provided with plug tubes protruding from the surface of the anode plate or the cathode plate, and the water inlet pipeline interface, oxygen pipeline interface and hydrogen pipeline interface are all provided with joint pipes that are plugged and matched with the plug tubes during installation.

7. The PEM water electrolysis hydrogen production integrated device according to claim 1, characterized in that: A dryer, a micro-oxygen inspection instrument and a leakage point instrument are also arranged in sequence on the connecting pipeline between the gas outlet end of the gas-liquid separator and the hydrogen storage tank.

8. The PEM water electrolysis hydrogen production integrated device according to claim 1, characterized in that: A radiator is also provided on the connecting pipeline between the circulation pump and the ultrapure water purification column, and the radiator is installed on the upper side of the installation frame by using a mounting bracket.

9. The PEM water electrolysis hydrogen production integrated device according to claim 1, characterized in that: The installation frame is made of stainless steel.

10. The PEM water electrolysis hydrogen production integrated device according to claim 1, characterized in that: Furthermore, the PEM water electrolysis hydrogen production integrated device can also be connected to a PLC controller.

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