Horizontal oxyhydrogen gas-liquid separator for hydrogen production by water electrolysis

Abstract

The utility model relates to the technical field of hydrogen production, in particular to a horizontal hydrogen-oxygen-liquid separator for producing hydrogen by electrolyzing water, which comprises a cylinder body, a gas-liquid inlet is arranged at one end of the bottom of the cylinder body, an alkali liquor outlet is arranged at the other end of the bottom of the cylinder body, and a gas outlet is arranged at the top of the cylinder body; the circulating water cooling device is arranged in the cylinder body, the circulating water cooling device comprises a cooling coil pipe, and the cooling coil pipe is used for condensing gas and liquid and cooling alkali liquor; and the trapping device is arranged at the gas outlet and is used for washing the gas by using pure water. According to the utility model, the gas-liquid separator is designed into a horizontal structure, so that the contact area between alkali liquor and gas is increased, the gas-liquid separation efficiency is improved, and the gas-liquid separator is suitable for various installation scenes. The built-in circulating water cooling device directly cools a gas-liquid mixture and separated alkali liquor in the barrel through the cooling coil, an external cooler is not needed, the system structure is simplified, the occupied space is reduced, and the construction and maintenance cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of hydrogen production technology, and in particular to a horizontal hydrogen-oxygen-liquid separator for hydrogen production by water electrolysis. Background Technology

[0002] With the introduction of the "dual carbon" target, new energy sources are being more closely integrated into social development. Among them, hydrogen energy is an ideal clean energy source. Combining renewable energy with water electrolysis to produce hydrogen can achieve zero-emission hydrogen production. After producing hydrogen through water electrolysis, it is necessary to separate and collect the alkaline solution entrained in the hydrogen and oxygen. This protects downstream containers and allows the alkaline solution to be recycled.

[0003] Compared to vertical gas-liquid separators, horizontal gas-liquid separators have a larger alkaline solution surface area, which is more conducive to the separation of gas from the alkaline solution. Horizontal gas-liquid separators also require less installation space and have a wider range of applications. In existing water electrolysis hydrogen production technologies, a separate cooler is often required on the alkaline solution recovery pipeline to cool the separated alkaline solution, increasing the overall system construction cost and resulting in a larger space occupied by the entire water electrolysis system, making it inconvenient to install.

[0004] The information disclosed in this background section is intended only to enhance the understanding of the general background 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

[0005] This invention provides a horizontal hydrogen-oxygen-liquid separator for hydrogen production by water electrolysis, thereby effectively solving the problems in the background art.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is: a horizontal hydrogen-oxygen-liquid separator for hydrogen production by water electrolysis, comprising:

[0007] The cylinder is arranged horizontally, with a gas-liquid inlet at one end of the bottom and an alkaline solution outlet at the other end, and a gas outlet at the top.

[0008] A circulating water cooling device is disposed inside the cylinder. The circulating water cooling device includes a cooling coil, which is used for gas-liquid condensation and for cooling alkaline solution.

[0009] A collection device is provided at the gas outlet to flush the gas with pure water.

[0010] Furthermore, the circulating water cooling device includes:

[0011] A cooling water inlet is provided at the bottom of the cylinder.

[0012] A cooling water outlet is provided at the top of the cylinder, and the two ends of the cooling coil are respectively connected to the cooling water inlet and the cooling water outlet.

[0013] Furthermore, the cooling coil is spirally wound inside the cylinder.

[0014] Furthermore, the collection device is vertically installed at the air outlet. Gas enters the bottom of the collection device from the air outlet, is flushed with pure water inside the collection device, and is discharged from the top of the collection device.

[0015] Furthermore, the trapping device includes:

[0016] An inlet, which is connected to the outlet;

[0017] A pure water inlet is located at one end of the top of the collection device;

[0018] The liquid outlet is located at the bottom of the collecting device at one end relative to the pure water inlet;

[0019] An exhaust port is located at the top of the collection device.

[0020] Furthermore, the liquid outlet is connected to the bottom of the cylinder via a pipe.

[0021] Furthermore, the cylinder is provided with a nitrogen purging port, which is connected to the bottom of the cylinder through a pipe.

[0022] Furthermore, the top of the cylinder is provided with several interfaces, which are used to install any one or more of a pressure transmitter, safety valve, pressure gauge, and level gauge.

[0023] Furthermore, the cylinder is also provided with an upper pressure port and a lower pressure port, which are respectively located at the upper end and the lower end of the cylinder.

[0024] The beneficial effects of this invention are as follows: By designing the gas-liquid separator as a horizontal structure, the contact area between the alkaline solution and the gas is increased, improving the gas-liquid separation efficiency and facilitating the complete separation of gas from the alkaline solution, making it suitable for various installation scenarios. The built-in circulating water cooling device directly cools the gas-liquid mixture and the separated alkaline solution inside the cylinder through cooling coils, eliminating the need for an external cooler, simplifying the system structure, reducing floor space, and lowering construction and maintenance costs. The collection device at the gas outlet uses pure water flushing to effectively capture residual alkaline solution entrained in the gas, improving the purity of hydrogen and oxygen gas, protecting downstream equipment, and extending the system's service life. The overall design achieves integrated separation, cooling, and purification, which is beneficial for the efficient, compact, and stable operation of the water electrolysis hydrogen production system. Attached Figure Description

[0025] 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.

[0026] Figure 1 This is a schematic diagram of the structure of this utility model;

[0027] Figure 2 This is a schematic diagram of a circulating water cooling device;

[0028] Figure 3 This is a schematic diagram of the trapping device;

[0029] Figure 4 This is a schematic diagram of the cylinder structure. Detailed Implementation

[0030] 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.

[0031] like Figures 1 to 4 As shown: A horizontal hydrogen-oxygen-liquid separator for hydrogen production by water electrolysis, comprising:

[0032] The cylinder 1 is arranged horizontally. One end of the bottom of the cylinder 1 is provided with a gas-liquid inlet 11, the other end of the bottom is provided with an alkaline solution outlet, and the top is provided with a gas outlet 13.

[0033] The circulating water cooling device 2 is installed inside the cylinder 1. The circulating water cooling device 2 includes a cooling coil 21, which condenses gas and liquid and cools alkaline solution.

[0034] The collection device 3 is located at the gas outlet 13 and uses pure water to flush the gas.

[0035] By designing the gas-liquid separator as a horizontal structure, the contact area between the alkali solution and the gas is increased, improving the gas-liquid separation efficiency and facilitating the complete separation of gas from the alkali solution. This design is suitable for various installation scenarios. The built-in circulating water cooling device 2 directly cools the gas-liquid mixture and the separated alkali solution inside the cylinder 1 through the cooling coil 21, eliminating the need for an external cooler, simplifying the system structure, reducing floor space, and lowering construction and maintenance costs. The collection device 3 at the gas outlet 13 uses pure water flushing to effectively capture residual alkali solution entrained in the gas, improving the purity of hydrogen and oxygen gas, protecting downstream equipment, and extending the system's service life. The overall design integrates separation, cooling, and purification, which is beneficial for the efficient, compact, and stable operation of the water electrolysis hydrogen production system.

[0036] In this embodiment, the circulating water cooling device 2 includes:

[0037] Cooling water inlet 22 is located at the bottom of cylinder 1;

[0038] Cooling water outlet 23 is located at the top of cylinder 1, and the two ends of cooling coil 21 are connected to cooling water inlet 22 and cooling water outlet 23 respectively.

[0039] By setting a cooling water inlet 22 at the bottom and a cooling water outlet 23 at the top of the cylinder 1, the cooling water flows from bottom to top in the cooling coil 21, which helps to fully absorb the heat of the gas-liquid mixture and the alkaline solution, improving the overall cooling efficiency. The cooling coil 21 is connected to the inlet and outlet at both ends, forming a closed-loop structure that ensures uniform cooling water flow and stable heat transfer. This structure eliminates the need for an external cooler, reducing system complexity and construction costs, while also reducing equipment size for easier integration and installation. The bottom-to-top flow also effectively avoids localized bubble retention, enhancing heat exchange and further improving hydrogen purity and system operational stability.

[0040] As a preferred embodiment of the above, the cooling coil 21 is spirally wound inside the cylinder 1.

[0041] The cooling coil 21 is spirally wound inside the cylinder 1 and is evenly distributed along the axial direction of the cylinder 1.

[0042] This structural design significantly increases the contact area between the cooling coil 21 and the gas-liquid mixture and alkaline solution, improving heat exchange efficiency. The spiral winding method extends the flow path of cooling water within the coil, allowing for more sufficient heat transfer time and contributing to a more stable cooling effect. Simultaneously, this arrangement is compact, occupies little space, and facilitates efficient placement within the horizontal cylindrical body 1, without affecting the gas-liquid separation process, thus contributing to the miniaturization and high integration of the overall equipment.

[0043] In this embodiment, the collection device 3 is vertically arranged at the air outlet 13. Gas enters the bottom of the collection device 3 from the air outlet 13, is flushed with pure water inside the collection device 3, and is discharged from the top of the collection device 3.

[0044] The gas collection device 3 utilizes the upward flow path of the gas combined with gravity to make it easier for entrained alkaline particles to be intercepted and washed by pure water, significantly improving the gas purification effect. Pure water rinsing further removes residual alkaline mist or impurities, ensuring the purity of the output gas and reducing corrosion and pollution to downstream equipment. The vertical arrangement is compact and easy to install, while also facilitating water vapor stratification and sedimentation, enhancing collection efficiency and improving the overall safety and stability of the system.

[0045] As a preferred embodiment of the above, the trapping device 3 includes:

[0046] Inlet 31, which is connected to outlet 13;

[0047] Pure water inlet 32 ​​is located at one end of the top of the collection device 3;

[0048] Liquid outlet 33 is located at the bottom of the collecting device 3 at one end relative to the pure water inlet 32.

[0049] The exhaust port is located at the top of the collection device 3.

[0050] By creating a top-down flushing flow of pure water within the collection device 3, while the gas flows upward through the pure water flushing zone, a counter-current contact is formed, significantly enhancing the collection and washing effect of alkaline residues. The liquid outlet 33 and the pure water inlet 32 ​​are located at opposite ends, facilitating timely discharge of waste liquid and preventing liquid accumulation from affecting flushing efficiency. The overall layout is reasonable and compact, effectively improving gas purity and further ensuring the stable operation of subsequent systems and equipment safety.

[0051] The liquid outlet 33 is connected to the bottom of the cylinder 1 through a pipe.

[0052] By connecting the outlet 33 to the bottom of the cylinder 1 via a pipeline, pure water is recycled, reducing pure water consumption, lowering operating costs, and avoiding environmental pollution caused by waste liquid discharge. Simultaneously, the returned flushing water can mix with the alkaline solution at the bottom of the cylinder 1 and be discharged together or cooled again, improving the overall liquid management efficiency of the system. Automatic return is achieved through pipeline connection, requiring no additional operation, further simplifying the structure and enhancing the automation and integration level of the equipment.

[0053] In this embodiment, a nitrogen replacement port 14 is provided on the cylinder 1, and the nitrogen replacement port 14 is connected to the bottom of the cylinder 1 through a pipe.

[0054] When the water electrolysis system needs to be gas-purified before starting or after stopping, it can be done through the nitrogen purging port 14 set on the gas-liquid separator. Nitrogen can be passed through the nitrogen purging port 14 and the stainless steel pipe connected to it to the bottom of the container to complete the gas replacement more completely.

[0055] As a preferred embodiment of the above, the top of the cylinder 1 is provided with a plurality of interfaces 15, which are used to install any one or more of pressure transmitters, safety valves, pressure gauges, and level gauges.

[0056] Safety valves, pressure transmitters, and pressure gauges are installed on the gas-liquid separator to ensure the stability of the internal pressure of the gas-liquid separator and the safe operation of the water electrolysis system.

[0057] The cylinder 1 is also provided with an upper pressure port 16 and a lower pressure port 17, which are respectively located at the upper end and the lower end of the cylinder 1.

[0058] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. "A plurality of" means two or more, unless otherwise explicitly specified.

[0059] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0060] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0061] 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. A horizontal hydrogen-oxygen-liquid separator for hydrogen production by water electrolysis, characterized in that, include: The cylinder is arranged horizontally, with a gas-liquid inlet at one end of the bottom and an alkaline solution outlet at the other end, and a gas outlet at the top. A circulating water cooling device is disposed inside the cylinder. The circulating water cooling device includes a cooling coil, which is used for gas-liquid condensation and for cooling alkaline solution. A collection device is provided at the gas outlet to flush the gas with pure water.

2. The horizontal hydrogen-oxygen-liquid separator for hydrogen production by water electrolysis according to claim 1, characterized in that, The circulating water cooling device includes: A cooling water inlet is provided at the bottom of the cylinder. A cooling water outlet is provided at the top of the cylinder, and the two ends of the cooling coil are respectively connected to the cooling water inlet and the cooling water outlet.

3. The horizontal hydrogen-oxygen-liquid separator for hydrogen production by water electrolysis according to claim 2, characterized in that, The cooling coil is spirally wound inside the cylinder.

4. The horizontal hydrogen-oxygen-liquid separator for hydrogen production by water electrolysis according to claim 1, characterized in that, The collection device is vertically installed at the air outlet. Gas enters the bottom of the collection device from the air outlet, is flushed with pure water inside the collection device, and is discharged from the top of the collection device.

5. The horizontal hydrogen-oxygen-liquid separator for hydrogen production by water electrolysis according to claim 4, characterized in that, The trapping device includes: An inlet, which is connected to the outlet; A pure water inlet is located at one end of the top of the collection device; The liquid outlet is located at the bottom of the collecting device at one end relative to the pure water inlet; An exhaust port is located at the top of the collection device.

6. The horizontal hydrogen-oxygen-liquid separator for hydrogen production by water electrolysis according to claim 5, characterized in that, The liquid outlet is connected to the bottom of the cylinder via a pipe.

7. The horizontal hydrogen-oxygen-liquid separator for hydrogen production by water electrolysis according to claim 1, characterized in that, The cylinder is provided with a nitrogen purging port, which is connected to the bottom of the cylinder through a pipe.

8. The horizontal hydrogen-oxygen-liquid separator for hydrogen production by water electrolysis according to claim 1, characterized in that, The top of the cylinder is provided with several interfaces, which are used to install any one or more of the following: pressure transmitter, safety valve, pressure gauge, and level gauge.

9. The horizontal hydrogen-oxygen-liquid separator for hydrogen production by water electrolysis according to claim 1, characterized in that, The cylinder is also provided with an upper pressure port and a lower pressure port, which are respectively located at the upper end and the lower end of the cylinder.

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