Hydrogen production system and hydrogen production equipment for electrolytic cell

Abstract

The utility model discloses an electrolytic bath hydrogen production system and hydrogen production equipment, and relates to the technical field of hydrogen production. In the application, the electrolytic cell hydrogen production system comprises a water system, an air system and an electrolytic cell, the water system and the air system are connected with an anode of the electrolytic cell, and the anode of the electrolytic cell generates oxygen, electrons and protons based on water provided by the water system and air provided by the air system; and generating hydrogen on the basis of the electrons, the protons and the water through the cathode of the electrolytic cell. The air system is additionally arranged on the anode water inlet pipeline of the electrolytic cell, so that air and water are simultaneously added into the anode of the electrolytic cell, the effect of diluting hydrogen in anode oxygen is achieved, and then the proportion of hydrogen in oxygen is reduced; the hydrogen production cost of the electrolytic cell can be reduced while the hydrogen proportion in oxygen is reduced.

Description

Technical Field

[0001] This application relates to the field of hydrogen production technology, and in particular to an electrolyzer hydrogen production system and hydrogen production equipment. Background Technology

[0002] Electrolysis of water for hydrogen production is widely used in commercial hydrogen production due to its high hydrogen purity and high production pressure. However, under pressure differential (cathode hydrogen production pressure is higher than anode), hydrogen can easily permeate through the membrane to reach the anode, causing an increase in hydrogen content in the oxygen. If the hydrogen content in the oxygen exceeds 4%, there is a risk of explosion. How to reduce the hydrogen content in the oxygen under pressure differential is a huge challenge for the fuel cell stack. Therefore, how to effectively reduce the hydrogen content in the oxygen during hydrogen production has become an urgent technical problem to be solved. Utility Model Content

[0003] The main purpose of this application is to propose an electrolyzer hydrogen production system and hydrogen production equipment, which aims to solve the technical problem of how to effectively reduce the hydrogen content in oxygen during the hydrogen production process.

[0004] To achieve the above objectives, the electrolyzer hydrogen production system proposed in this application includes: a water system, an air system, and an electrolyzer;

[0005] The water system and the air system are connected to the anode of the electrolytic cell;

[0006] The anode of the electrolytic cell is used to generate oxygen, electrons, and protons based on the water provided by the water system and the air provided by the air system;

[0007] The cathode of the electrolyzer is used to generate hydrogen gas based on the electrons, the protons, and the water.

[0008] In one embodiment, the electrolytic cell is a PEM electrolytic cell.

[0009] In one embodiment, the air system includes: an air filter module and an air pump;

[0010] The air pump is connected to the air filter module, the water system, and the anode of the PEM electrolysis cell, respectively.

[0011] In one embodiment, the water system includes: a water tank and a water pump;

[0012] The water tank is connected to the cathode of the PEM electrolytic cell and the water pump, respectively. The water pump is also connected to the air system and the anode of the PEM electrolytic cell.

[0013] In one embodiment, the electrolyzer hydrogen production system further includes: a gas-liquid separation system;

[0014] The cathode of the PEM electrolyzer is connected to the gas-liquid separation system;

[0015] The gas-liquid separation system is used to separate the oxygen from the water and the hydrogen from the water, and output the separated oxygen and hydrogen.

[0016] In one embodiment, the gas-liquid separation system includes: an oxygen-side gas-liquid separation module and a hydrogen-side gas-liquid separation module;

[0017] The oxygen-side gas-liquid separation module is connected to the cathode of the PEM electrolyzer and the water system, respectively; the hydrogen-side gas-liquid separation module is connected to the cathode of the PEM electrolyzer and the water system, respectively.

[0018] The oxygen-side gas-liquid separation module is used to separate the oxygen from the water and output the separated oxygen.

[0019] The hydrogen-side gas-liquid separation module is used to separate the hydrogen from the water and output the separated hydrogen.

[0020] In one embodiment, the oxygen-side gas-liquid separation module is further configured to separate the oxygen from the water and output the separated water.

[0021] The hydrogen-side gas-liquid separation module is also used to separate the hydrogen from the water and output the separated water.

[0022] In one embodiment, the electrolyzer hydrogen production system further includes: a purification and filtration module;

[0023] The purification and filtration module is connected to the oxygen-side gas-liquid separation module, the hydrogen-side gas-liquid separation module, and the water system, respectively.

[0024] The purification and filtration module is used to purify and filter the separated water and output the filtered water to the water system.

[0025] In one embodiment, when the ratio of hydrogen to oxygen is less than a preset threshold, the power of the air pump is reduced.

[0026] This application also proposes a hydrogen production device, which includes an electrolyzer hydrogen production system as described above.

[0027] In this application, the electrolyzer hydrogen production system includes a water system, an air system, and an electrolyzer. The water system and the air system are connected to the anode of the electrolyzer. This application generates oxygen, electrons, and protons at the anode of the electrolyzer based on water provided by the water system and air provided by the air system. Hydrogen gas is then generated at the cathode of the electrolyzer based on electrons, protons, and the water. This application adds an air system to the anode inlet pipe of the electrolyzer, allowing air and water to be added to the anode simultaneously. This dilutes the hydrogen in the oxygen at the anode, thereby reducing the hydrogen content in the oxygen. Compared to existing methods that add platinum material to the anode side of the proton exchange membrane for hydrogen removal, this application can reduce the hydrogen content in the oxygen while simultaneously reducing the cost of hydrogen production in the electrolyzer. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0029] Figure 1 A schematic diagram of the structure of an embodiment of the electrolyzer hydrogen production system provided in this application;

[0030] Figure 2 This is a schematic diagram of another embodiment of the electrolyzer hydrogen production system provided in this application.

[0031] Explanation of icon numbers:

[0032] 10. Water system; 20. Air system; 30. Electrolyzer; 301. PEM electrolyzer; 201. Air filtration module; 202. Air pump; 101. Water tank; 102. Water pump; 40. Gas-liquid separation system; 401. Oxygen-side gas-liquid separation module; 402. Hydrogen-side gas-liquid separation module; 50. Purification filtration module.

[0033] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0034] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0035] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0036] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0037] This application proposes an electrolyzer hydrogen production system.

[0038] Please see Figure 1 , Figure 1 This is a schematic diagram of the structure of an embodiment of the electrolyzer hydrogen production system provided in this application. In one embodiment of this application, the electrolyzer hydrogen production system includes: a water system 10, an air system 20, and an electrolyzer 30.

[0039] The water system 10 and the air system 20 are connected to the anode of the electrolytic cell 30;

[0040] Furthermore, in this embodiment, the electrolytic cell 30 is a PEM electrolytic cell 301.

[0041] Understandably, the electrolyzer in this embodiment can be a PEM electrolyzer, which uses a proton exchange membrane (PEM) to allow protons (hydrogen ions) to pass through but prevents electrons and other gases from passing through. The water system 10 can be used to supply water, and the air system 20 can be used to supply air.

[0042] The anode of the electrolytic cell 30 is used to generate oxygen, electrons, and protons based on the water provided by the water system 10 and the air provided by the air system 20.

[0043] It should be understood that in the electrolyzer 30, the water supplied by the water system 10 can undergo an oxidation reaction at the anode to produce oxygen, electrons and protons, and air supplied by the air system 20 is also input at the anode.

[0044] The cathode of the electrolytic cell 30 is used to generate hydrogen gas based on the electrons, the protons, and the water.

[0045] Understandably, electrons generated at the anode of electrolyzer 30 flow to the cathode through an external circuit, while protons pass through the proton exchange membrane. At the cathode of electrolyzer 30, protons, electrons, and water react to generate hydrogen. Furthermore, the continuous supply of air by the air system 20 reduces the hydrogen content in the oxygen. Compared to the commonly used thicker proton exchange membranes in engineering to reduce hydrogen in oxygen, which increases proton transfer resistance and degrades electrolyzer performance, another method is to add platinum material to the anode side of the proton exchange membrane to remove hydrogen. However, this significantly increases the cost of the electrolyzer and reduces its efficiency. This embodiment adds an air system to the anode inlet pipe of the electrolyzer, allowing air and water to be added simultaneously to the anode, thereby diluting the hydrogen in the anode oxygen. This reduces the hydrogen content in the oxygen while lowering the cost of hydrogen production from the electrolyzer.

[0046] In this application, the electrolyzer hydrogen production system includes a water system, an air system, and an electrolyzer. The water system and the air system are connected to the anode of the electrolyzer. This application generates oxygen, electrons, and protons at the anode of the electrolyzer based on water provided by the water system and air provided by the air system. Hydrogen gas is then generated at the cathode of the electrolyzer based on electrons, protons, and the water. This application adds an air system to the anode inlet pipe of the electrolyzer, allowing air and water to be added to the anode simultaneously. This dilutes the hydrogen in the oxygen at the anode, thereby reducing the hydrogen content in the oxygen. Compared to existing methods that add platinum material to the anode side of the proton exchange membrane for hydrogen removal, this application can reduce the hydrogen content in the oxygen while simultaneously reducing the cost of hydrogen production in the electrolyzer.

[0047] Reference Figure 2 , Figure 2 This is a schematic diagram of another embodiment of the electrolyzer hydrogen production system provided in this application. In another embodiment of this application, the air system 20 includes: an air filter module 201 and an air pump 202;

[0048] The air pump 202 is connected to the air filter module 201, the water system 10, and the anode of the PEM electrolysis cell 301.

[0049] It should be understood that the air filter module 201 can filter impurities in the air, such as gaseous pollutants and particulate matter, and deliver the filtered air to the anode of the PEM electrolysis cell 301 via the air pump 202.

[0050] Furthermore, in this embodiment, the water system 10 includes: a water tank 101 and a water pump 102;

[0051] The water tank 101 is connected to the cathode of the PEM electrolysis cell 301 and the water pump 102 respectively. The water pump 102 is also connected to the air system 20 and the anode of the PEM electrolysis cell 301.

[0052] Understandably, the water tank 101 can contain ultrapure water, and the ultrapure water in the water tank 101 is transported to the anode of the PEM electrolysis cell 301 by the water pump 102.

[0053] Furthermore, in this embodiment, the electrolyzer hydrogen production system further includes: a gas-liquid separation system 40;

[0054] The cathode of the PEM electrolysis cell 301 is connected to the gas-liquid separation system 40;

[0055] The gas-liquid separation system 40 is used to separate the oxygen from the water and the hydrogen from the water, and output the separated oxygen and hydrogen.

[0056] It should be understood that the oxygen generated at the anode of the PEM electrolyzer 301 and the hydrogen generated at the cathode of the PEM electrolyzer 301 may carry water. Therefore, the oxygen and water can be separated by the gas-liquid separation system 40 to output the separated oxygen. The hydrogen and water can also be separated by the gas-liquid separation system 40 to output the separated hydrogen.

[0057] Furthermore, in this embodiment, the gas-liquid separation system 40 includes: an oxygen-side gas-liquid separation module 401 and a hydrogen-side gas-liquid separation module 402;

[0058] The oxygen-side gas-liquid separation module 401 is connected to the cathode of the PEM electrolyzer 301 and the water system 10, respectively, and the hydrogen-side gas-liquid separation module 402 is connected to the cathode of the PEM electrolyzer 301 and the water system 10, respectively.

[0059] The oxygen-side gas-liquid separation module 401 is used to separate the oxygen from the water and output the separated oxygen.

[0060] The hydrogen-side gas-liquid separation module 402 is used to separate the hydrogen from the water and output the separated hydrogen.

[0061] In a specific implementation, the oxygen-side gas-liquid separation module 401 provided in this embodiment can separate oxygen and water into gas and liquid, and output the separated oxygen. The hydrogen-side gas-liquid separation module 402 can separate hydrogen and water into gas and liquid, and output the separated hydrogen.

[0062] Furthermore, in this embodiment, the oxygen-side gas-liquid separation module 401 is also used to separate the oxygen from the water and output the separated water.

[0063] The hydrogen-side gas-liquid separation module 402 is also used to separate the hydrogen from the water and output the separated water.

[0064] Understandably, after separating oxygen and water, the oxygen-side gas-liquid separation module 401 can output both separated oxygen and separated water. Similarly, after separating hydrogen and water, the hydrogen-side gas-liquid separation module 402 can output both separated hydrogen and separated water.

[0065] Furthermore, in this embodiment, the electrolyzer hydrogen production system further includes: a purification and filtration module 50;

[0066] The purification and filtration module 50 is connected to the oxygen-side gas-liquid separation module 401, the hydrogen-side gas-liquid separation module 402, and the water system 10, respectively.

[0067] The purification and filtration module 50 is used to purify and filter the separated water and output the filtered water to the water system 10.

[0068] It should be understood that the purification and filtration module 50 provided in this embodiment can purify and filter the separated water, remove impurities from the separated water, obtain filtered water, and output the filtered water to the water system 10 for recycling and use in hydrogen production.

[0069] Furthermore, in this embodiment, when the ratio between hydrogen and oxygen is less than a preset threshold, the power of the air pump 202 is reduced.

[0070] In practice, when the electrical density is low (the amount of hydrogen and oxygen produced is small), that is, when the ratio of hydrogen to oxygen is less than a preset threshold, the power of the air pump can be reduced, thereby reducing the energy consumption of the electrolyzer hydrogen production system while ensuring a low hydrogen content in oxygen.

[0071] This application also proposes a hydrogen production device, which includes an electrolyzer hydrogen production system. The specific structure of the electrolyzer hydrogen production system is as described in the above embodiments. Since this hydrogen production device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0072] The above description is merely an exemplary embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the technical concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. An electrolyzer hydrogen production system, characterized in that, The electrolyzer hydrogen production system includes: a water system, an air system, and an electrolyzer, wherein the electrolyzer is a PEM electrolyzer; The water system and the air system are connected to the anode of the electrolytic cell; The anode of the electrolytic cell is used to generate oxygen, electrons, and protons based on the water provided by the water system and the air provided by the air system; The cathode of the electrolyzer is used to generate hydrogen gas based on the electrons, the protons, and the water; The air system includes: an air filter module and an air pump; The air pump is connected to the air filtration module, the water system, and the anode of the PEM electrolysis cell, respectively. The water system includes: a water tank and a water pump; The water tank is connected to the cathode of the PEM electrolytic cell and the water pump, respectively. The water pump is also connected to the air system and the anode of the PEM electrolytic cell.

2. The electrolyzer hydrogen production system as described in claim 1, characterized in that, The electrolyzer hydrogen production system also includes: a gas-liquid separation system; The cathode of the PEM electrolyzer is connected to the gas-liquid separation system; The gas-liquid separation system is used to separate the oxygen from the water and the hydrogen from the water, and output the separated oxygen and hydrogen.

3. The electrolyzer hydrogen production system as described in claim 2, characterized in that, The gas-liquid separation system includes: an oxygen-side gas-liquid separation module and a hydrogen-side gas-liquid separation module; The oxygen-side gas-liquid separation module is connected to the cathode of the PEM electrolyzer and the water system, respectively; the hydrogen-side gas-liquid separation module is connected to the cathode of the PEM electrolyzer and the water system, respectively. The oxygen-side gas-liquid separation module is used to separate the oxygen from the water and output the separated oxygen. The hydrogen-side gas-liquid separation module is used to separate the hydrogen from the water and output the separated hydrogen.

4. The electrolyzer hydrogen production system as described in claim 3, characterized in that, The oxygen-side gas-liquid separation module is also used to separate the oxygen from the water and output the separated water. The hydrogen-side gas-liquid separation module is also used to separate the hydrogen from the water and output the separated water.

5. The electrolyzer hydrogen production system as described in claim 4, characterized in that, The electrolyzer hydrogen production system also includes: a purification and filtration module; The purification and filtration module is connected to the oxygen-side gas-liquid separation module, the hydrogen-side gas-liquid separation module, and the water system, respectively. The purification and filtration module is used to purify and filter the separated water and output the filtered water to the water system.

6. The electrolyzer hydrogen production system as described in claim 1, characterized in that, When the ratio of hydrogen to oxygen is less than a preset threshold, the power of the air pump is reduced.

7. A hydrogen production device, characterized in that, The hydrogen production equipment includes an electrolyzer hydrogen production system as described in any one of claims 1 to 6.

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