Alkaline water electrolysis hydrogen production device

Abstract

The utility model relates to electrolytic water hydrogen production technical field especially relates to a kind of hydrogen production device of alkaline electrolytic water, comprising: alkaline electrolytic cell, alkaline electrolytic cell is used for electrolytic hydrogen production;Hydrogen separator and oxygen separator, hydrogen separator and oxygen separator are respectively communicated with alkaline electrolytic cell, for separating the hydrogen and oxygen generated by electrolysis;Trapper, trapper is set on hydrogen separator, and located hydrogen gas export, trapper carries out pure water flushing to hydrogen gas, removes alkali liquor carried therein. In the utility model, by setting trapper at the hydrogen gas export of hydrogen separator, and using pure water to flush hydrogen gas, effectively remove the alkali liquor impurities entrained in hydrogen gas, avoid alkali liquor into subsequent deoxidation tower to cause corrosion to catalyst. This design not only prolongs the service life of deoxidation tower, reduces equipment maintenance frequency and replacement cost, also improves the operation stability and reliability of entire hydrogen production system.

Description

Technical Field

[0001] This utility model relates to the field of water electrolysis for hydrogen production technology, and in particular to an alkaline water electrolysis hydrogen production device. Background Technology

[0002] Hydrogen is a clean and environmentally friendly green energy source. With the increasing demand for fossil fuels and the dwindling global reserves, hydrogen is considered the most likely green energy source to replace fossil fuels in the future. Furthermore, the only byproduct of the complete combustion of hydrogen is water, making it an ideal and clean green energy source. The main methods of hydrogen production in industry include: hydrogen production from fossil fuels, methanol production, and water electrolysis. Hydrogen production through water electrolysis combined with renewable energy sources offers advantages such as zero carbon emissions and suitability for large-scale applications, and is considered the most promising and cleanest hydrogen production method.

[0003] Currently, the commercially available methods for producing hydrogen through water electrolysis include: alkaline water electrolysis (ALK), proton exchange membrane water electrolysis (PEM), and solid oxide electrolysis (SOEC). The first two methods have been commercialized, while the third is currently in the laboratory testing phase. Alkaline water electrolysis technology has been developed for a longer period and has advantages such as high technological maturity, low cost, low requirements for water quality, large capacity for electrolysis, and suitability for large-scale production. It is currently the most mainstream method for producing hydrogen through water electrolysis.

[0004] Traditional alkaline water electrolysis has the following drawbacks: the hydrogen generated in the electrolyzer enters the deoxygenation tower directly after passing through the hydrogen separator, and some of the alkaline solution in the hydrogen will damage the deoxygenation catalyst, affecting the lifespan of the deoxygenation tower.

[0005] The information disclosed in this background section is intended only to enhance the understanding of the overall background technology of this utility model, and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0006] This invention provides an alkaline water electrolysis hydrogen production device, thereby effectively solving the problems in the background art.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is: an alkaline water electrolysis hydrogen production device, comprising:

[0008] An alkaline electrolyzer, wherein the alkaline electrolyzer is used for electrolytic hydrogen production;

[0009] A hydrogen separator and an oxygen separator are respectively connected to the alkaline electrolytic cell and are used to separate hydrogen and oxygen produced by electrolysis.

[0010] A collector is installed on the hydrogen separator and located at the hydrogen outlet. The collector flushes the hydrogen with pure water to remove any alkaline solution carried therein.

[0011] Furthermore, the trap includes:

[0012] A filter screen, wherein the filter screen is disposed within the collector;

[0013] A pure water pipeline is installed on the collector to supply pure water to the collector and flush out the hydrogen gas.

[0014] Furthermore, the collector also includes an output port, which is connected to the hydrogen separator. Pure water is used to flush the hydrogen gas and then output from the output port into the hydrogen separator.

[0015] Furthermore, the hydrogen separator and oxygen separator are equipped with an alkaline solution circulation pipeline, which is connected to the alkaline electrolytic cell to circulate the alkaline solution separated from hydrogen or oxygen into the alkaline electrolytic cell.

[0016] Furthermore, it also includes a condenser, which is respectively disposed after the hydrogen separator and the oxygen separator to condense hydrogen and oxygen.

[0017] Furthermore, cooling water pipes are respectively provided on the condenser, hydrogen separator and oxygen separator, and the cooling water pipes are arranged around the condenser, hydrogen separator and oxygen separator.

[0018] Furthermore, the condenser is provided with a condensate outlet, which is connected to the hydrogen separator or oxygen separator to input condensate into the hydrogen separator or oxygen separator.

[0019] Furthermore, it also includes a nitrogen pipeline, which is connected to the hydrogen separator and the oxygen separator respectively, for filling the hydrogen separator and the oxygen separator with nitrogen before operation.

[0020] Furthermore, it also includes a three-tower circulating drying system, the three-tower circulating drying system comprising:

[0021] Three drying towers, the three drying towers being used for cyclic drying of hydrogen;

[0022] Three second condensers are connected to hydrogen gas, and each of the three second condensers is equipped with a solenoid valve for controlling the direction of hydrogen gas delivery.

[0023] Furthermore, the direction of hydrogen delivery between the three second condensers is controlled by pipes and valves installed between the three second condensers, thereby achieving cyclic drying of the three drying towers.

[0024] Furthermore, it also includes temperature regulating valves, pressure regulating valves, and liquid level regulating valves;

[0025] The temperature regulating valve is installed in the condenser pipeline after the hydrogen separator;

[0026] The pressure regulating valve is located in the outlet pipe of the hydrogen separator;

[0027] The liquid level regulating valve is installed in the outlet pipe of the oxygen separator.

[0028] The beneficial effects of this invention are as follows: By installing a collector at the hydrogen outlet of the hydrogen separator and using pure water to flush the hydrogen, alkaline impurities entrained in the hydrogen are effectively removed, preventing alkaline solutions from entering the subsequent deoxygenation tower and corroding the catalyst. This design not only extends the service life of the deoxygenation tower and reduces equipment maintenance frequency and replacement costs, but also improves the operational stability and reliability of the entire hydrogen production system. Furthermore, the pure water flushing method is simple to operate and inexpensive, making it suitable for the modification and upgrading of existing alkaline water electrolysis hydrogen production systems, and possesses good engineering practical value and promising prospects for widespread application. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the structure of this utility model;

[0031] Figure 2 This is a schematic diagram of the trap's structure;

[0032] Figure 3 This is a schematic diagram of the alkali solution circulation pipeline;

[0033] Figure 4 This is a schematic diagram of a nitrogen pipeline.

[0034] Figure 5 This is a schematic diagram of a three-tower circulating drying system. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0036] like Figures 1 to 5 As shown: An alkaline water electrolysis hydrogen production device, comprising:

[0037] Alkaline electrolyzer 1 is used for electrolytic hydrogen production.

[0038] Hydrogen separator 2 and oxygen separator 3 are respectively connected to alkaline electrolytic cell 1 and are used to separate hydrogen and oxygen produced by electrolysis.

[0039] The collector 4 is installed on the hydrogen separator 2 and located at the hydrogen outlet. The collector 4 flushes the hydrogen with pure water to remove the alkaline solution carried in it.

[0040] like Figure 1 As shown, Figure 1 The direction of the middle arrow indicates the hydrogen delivery direction. By installing a collector 4 at the hydrogen outlet of hydrogen separator 2 and flushing the hydrogen with pure water, alkaline impurities entrained in the hydrogen are effectively removed, preventing alkaline solutions from entering the subsequent deoxygenation tower and corroding the catalyst. This design not only extends the service life of the deoxygenation tower and reduces equipment maintenance frequency and replacement costs, but also improves the operational stability and reliability of the entire hydrogen production system. Furthermore, the pure water flushing method is simple to operate and inexpensive, making it suitable for the retrofitting and upgrading of existing alkaline water electrolysis hydrogen production systems, and possesses good engineering practical value and promising prospects for widespread application.

[0041] like Figure 2 As shown, the trap 4 includes:

[0042] Filter mesh, the filter mesh is installed inside the collector 4;

[0043] Pure water pipeline 41 is installed on the collector 4 to input pure water into the collector 4 and flush out the hydrogen gas.

[0044] The collector 4 is equipped with a filter screen to further intercept alkaline droplets entrained in the hydrogen, improving the physical separation effect. Simultaneously, a pure water pipeline 41 is installed on the collector 4, allowing pure water to be injected into it to flush the hydrogen, enhancing the removal of alkaline solution. This structural design ensures higher purity hydrogen after dual treatment of filtration and flushing, effectively guaranteeing the stable operation of the subsequent deoxygenation tower and further enhancing the system's corrosion resistance and safety. The overall structure is simple, cost-effective, and possesses good practicality and scalability.

[0045] The collector 4 also includes an output port 42, which is connected to the hydrogen separator 2. After pure water washes the hydrogen gas, it is output from the output port 42 to the hydrogen separator 2, which facilitates the recovery of alkaline solution and can also replenish the water in the alkaline electrolysis cell 1.

[0046] like Figure 3 As shown, hydrogen separator 2 and oxygen separator 3 are equipped with alkaline solution circulation pipelines 5. Figure 3 The reverse direction of the middle arrow indicates the direction of alkali solution delivery. The alkali solution circulation pipeline 5 is connected to the alkaline electrolytic cell 1, and the alkali solution separated from hydrogen or oxygen is circulated into the alkaline electrolytic cell 1.

[0047] Hydrogen separator 2 and oxygen separator 3 are equipped with alkali circulation pipelines 5, which are connected to the alkaline electrolytic cell 1, allowing the alkali carried during the separation process to flow back into the electrolytic cell. This design not only effectively recovers the alkali that escapes during the separation process, reducing alkali loss and lowering operating costs, but also prevents the discharge of alkali from affecting subsequent equipment, further improving the system's resource utilization and environmental performance, and contributing to the long-term stable operation of the device.

[0048] As a preferred embodiment of the above, a condenser 6 is also included, which is disposed after the hydrogen separator 2 and the oxygen separator 3 to condense hydrogen and oxygen.

[0049] Condenser 6 is installed after hydrogen separator 2 and oxygen separator 3 to condense the separated hydrogen and oxygen, further reducing the gas temperature, facilitating subsequent storage and transportation, improving gas quality and system safety, and also condensing the alkaline solution entrained in the gas.

[0050] In this embodiment, cooling water pipes 7 are respectively provided on the condenser 6, hydrogen separator 2 and oxygen separator 3, and the cooling water pipes 7 are wound around the condenser 6, hydrogen separator 2 and oxygen separator 3.

[0051] Cooling water pipes 7 are provided on the condenser 6, hydrogen separator 2, and oxygen separator 3, and these pipes are wound around the surface of the devices to achieve continuous external cooling. This design helps maintain the operation of each part of the system within a reasonable temperature range, prevents equipment damage or performance degradation caused by high temperatures, and enhances the overall thermal stability and operational reliability of the system.

[0052] The condenser 6 is equipped with a condensate outlet, which is connected to the hydrogen separator 2 or the oxygen separator 3 to input condensate into the hydrogen separator 2 or the oxygen separator 3.

[0053] Condenser 6 is equipped with a condensate outlet, which is connected to the interior of hydrogen separator 2 or oxygen separator 3, allowing condensate generated during the condensation process to be directed into the corresponding separator. This design fully utilizes the cooling effect of condensate to assist in cooling the separator's interior, improving gas-liquid separation efficiency. Simultaneously, it prevents condensate accumulation from causing system pressure fluctuations, optimizes the system's thermal cycle and drainage management, and further enhances the overall operational stability and energy efficiency of the unit.

[0054] like Figure 4 As shown, it also includes a nitrogen pipeline 8. Figure 4 The direction of the middle arrow indicates the direction of nitrogen delivery. The nitrogen pipeline 8 is connected to the hydrogen separator 2 and the oxygen separator 3 respectively, and is used to fill the hydrogen separator 2 and the oxygen separator 3 with nitrogen before operation.

[0055] Nitrogen line 8 is connected to the interior of hydrogen separator 2 and oxygen separator 3, respectively, and is used to fill them with nitrogen before system startup. This design can effectively achieve inert gas protection, remove residual air inside the separators, and prevent safety hazards such as explosions caused by the mixing of oxygen with flammable gases in the air, thereby improving the inherent safety of the device and ensuring the stability and reliability of the system startup process.

[0056] like Figure 5 As shown, in this embodiment, a three-tower circulating drying system 9 is also included, which includes:

[0057] Three drying towers 91 are used for the cyclic drying of hydrogen.

[0058] Three secondary condensers 92 are connected to hydrogen gas, and each of the three secondary condensers 92 is equipped with a solenoid valve 93, which is used to control the direction of hydrogen gas delivery.

[0059] The hydrogen between the three second condensers 92 is controlled by pipes and valves installed between the three second condensers 92 to achieve circulating drying in the three drying towers 91.

[0060] As a preferred embodiment of the above, the system further includes a temperature regulating valve 101, a pressure regulating valve 102, and a liquid level regulating valve 103.

[0061] Temperature regulating valve 101 is installed in the condenser pipe after the hydrogen separator; it can control the cooling water volume according to the temperature of the hydrogen produced by the electrolyzer to ensure the temperature of the hydrogen delivered.

[0062] Pressure regulating valve 102 is installed in the outlet pipe of the hydrogen separator; it can regulate the pressure in the oxygen separator and the hydrogen separator.

[0063] The liquid level regulating valve 103 is installed in the outlet pipe of the oxygen separator; it can regulate the liquid level in the oxygen separator and hydrogen separator.

[0064] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An alkaline water electrolysis hydrogen production device, characterized in that, include: An alkaline electrolyzer, wherein the alkaline electrolyzer is used for electrolytic hydrogen production; A hydrogen separator and an oxygen separator are respectively connected to the alkaline electrolytic cell and are used to separate hydrogen and oxygen produced by electrolysis. A collector is installed on the hydrogen separator and located at the hydrogen outlet. The collector flushes the hydrogen with pure water to remove any alkaline solution carried therein.

2. The alkaline water electrolysis hydrogen production apparatus according to claim 1, characterized in that, The trap includes: A filter screen, wherein the filter screen is disposed within the collector; A pure water pipeline is installed on the collector to supply pure water to the collector and flush out the hydrogen gas.

3. The alkaline water electrolysis hydrogen production apparatus according to claim 2, characterized in that, The collector also includes an output port, which is connected to the hydrogen separator. Pure water is used to flush the hydrogen gas and then outputs it from the output port into the hydrogen separator.

4. The alkaline water electrolysis hydrogen production apparatus according to claim 1, characterized in that, The hydrogen separator and oxygen separator are equipped with an alkaline solution circulation pipeline, which is connected to the alkaline electrolytic cell to circulate the alkaline solution separated from hydrogen or oxygen into the alkaline electrolytic cell.

5. The alkaline water electrolysis hydrogen production apparatus according to claim 1, characterized in that, It also includes a condenser, which is respectively installed after the hydrogen separator and the oxygen separator to condense hydrogen and oxygen.

6. The alkaline water electrolysis hydrogen production apparatus according to claim 5, characterized in that, Cooling water pipes are respectively provided on the condenser, hydrogen separator and oxygen separator, and the cooling water pipes are arranged around the condenser, hydrogen separator and oxygen separator.

7. The alkaline water electrolysis hydrogen production apparatus according to claim 6, characterized in that, The condenser is provided with a condensate outlet, which is connected to the hydrogen separator or oxygen separator to input condensate into the hydrogen separator or oxygen separator.

8. The alkaline water electrolysis hydrogen production apparatus according to claim 1, characterized in that, It also includes a nitrogen pipeline, which is connected to the hydrogen separator and the oxygen separator respectively, and is used to fill the hydrogen separator and the oxygen separator with nitrogen before operation.

9. The alkaline water electrolysis hydrogen production apparatus according to claim 1, characterized in that, It also includes a three-tower circulating drying system, which comprises: Three drying towers, the three drying towers being used for cyclic drying of hydrogen; Three second condensers are connected to hydrogen gas, and each of the three second condensers is equipped with a solenoid valve for controlling the direction of hydrogen gas delivery.

10. The alkaline water electrolysis hydrogen production apparatus according to claim 9, characterized in that, Hydrogen gas between the three second condensers is controlled by pipes and valves installed between the three second condensers to achieve circulating drying in the three drying towers.

11. The alkaline water electrolysis hydrogen production apparatus according to claim 5, characterized in that, It also includes temperature regulating valves, pressure regulating valves, and liquid level regulating valves; The temperature regulating valve is installed in the condenser pipeline after the hydrogen separator; The pressure regulating valve is located in the outlet pipe of the hydrogen separator; The liquid level regulating valve is installed in the outlet pipe of the oxygen separator.

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