Washer for producing hydrogen by electrolyzing water

Abstract

The utility model discloses an electrolytic water hydrogen production scrubber which comprises a scrubber body, a gas inlet pipe is arranged on one side of the lower portion of the scrubber body, one end of the gas inlet pipe extends into the scrubber body and is connected with a gas distributor, and a water inlet pipe is arranged on one side of the upper portion of the scrubber body. One end of the water inlet pipe extends into the scrubber body and is connected with a liquid distributor, an exhaust pipe is arranged at the upper end of the scrubber body, and an overflow pipe is arranged on one side of the scrubber body; a spiral fin is arranged at the upper part of the gas distributor, and a plurality of bulges are arranged on at least one surface of the spiral fin; and a wire mesh demister is arranged at the upper part of the liquid distributor. The spiral fins are arranged in the scrubber body, the protrusions are arranged on the spiral fins, on one hand, alkali liquor in hydrogen is separated through centrifugal force, on the other hand, the hydrogen collides with the protrusions during circulation, the alkali liquor in the hydrogen is captured again, efficient purification of the hydrogen is achieved, and meanwhile the use amount of pure water is reduced.

Description

Technical Field

[0001] The utility model belongs to the field of scrubbers, and particularly relates to a scrubber for producing hydrogen by electrolyzing water. Background Art

[0002] As a clean, efficient, and renewable energy carrier, hydrogen is becoming increasingly important. As one of the primary methods for hydrogen production, hydrogen production through water electrolysis, with its mature technology and high product purity, is becoming a key cornerstone of the future hydrogen energy industry. In this process, efficient hydrogen separation and purification are key to ensuring hydrogen quality and improving energy efficiency.

[0003] In traditional water electrolysis hydrogen production systems, the hydrogen produced by electrolysis in the hydrolyzer often carries a certain amount of electrolyte (such as sodium hydroxide or potassium hydroxide solution in alkaline electrolytes). If these residues are directly used in subsequent applications, they will not only corrode equipment and reduce product quality, but may also have adverse impacts on the environment. Therefore, a hydrogen scrubber is usually installed after the hydrogen separator. Using pure water as the scrubbing medium, it removes the small amount of alkaline solution entrained in the hydrogen through physical or chemical reactions to achieve the purpose of purifying the hydrogen.

[0004] However, existing hydrogen scrubbers suffer from significant water consumption during operation. Large quantities of pure water must be continuously injected into the scrubber to maintain scrubbing effectiveness, especially when producing high-purity hydrogen. This high water consumption significantly increases water consumption in regions where water resources are already scarce, exacerbating the imbalance between water supply and demand and limiting the widespread adoption of hydrogen production technology through water electrolysis. Utility Model Content

[0005] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a water electrolysis hydrogen production scrubber that achieves efficient purification of hydrogen while significantly reducing water consumption during the washing process.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A water electrolysis hydrogen production scrubber includes a scrubber body, a support leg is provided at the lower part of the scrubber body, an air inlet pipe is provided on one side of the lower part of the scrubber body, one end of the air inlet pipe extends to the interior of the scrubber body and is connected to a gas distributor, a water inlet pipe is provided on one side of the upper part of the scrubber body, one end of the water inlet pipe extends to the interior of the scrubber body and is connected to a liquid distributor, the gas distributor and the liquid distributor both include a main pipe and a plurality of branch pipes provided on both sides of the main pipe, the lower part of the branch pipe is provided with a through hole, the lower end of the scrubber body is provided with a sewage pipe, the upper end of the scrubber body is provided with an exhaust pipe, and one side of the scrubber body is provided with an overflow pipe; the upper part of the gas distributor is provided with a spiral fin, and the spiral fin is provided with a plurality of protrusions on at least one surface; the upper part of the liquid distributor is provided with a wire mesh demister.

[0008] Furthermore, the height of the protrusions is 5-10 mm, the spacing between adjacent protrusions is not less than 10 mm, and the protrusions on the spiral fins are arranged in a staggered manner.

[0009] Furthermore, a packing layer is provided between the liquid distributor and the spiral fins.

[0010] Furthermore, the filler layer is made of porous ball fillers.

[0011] Furthermore, an air distribution plate is provided between the packing layer and the spiral fins, and the air distribution plate is provided with a plurality of evenly distributed air distribution holes.

[0012] Furthermore, a heat exchanger is provided on one side of the air inlet pipe, and the cooling medium inlet of the heat exchanger is connected to an external water pipe or communicated with an overflow pipe.

[0013] Furthermore, a pressure valve is provided on one side of the heat exchanger, and the pressure valve includes a valve body, an air inlet is provided on one side of the valve body, and the air inlet is connected to the air outlet of the heat exchanger, and a top plug is provided on the other side of the valve body, and a spring is provided on one side of the top plug, and the other end of the spring is connected to a piston, and an air outlet pipe is connected to the side wall of the valve body, one end of the air outlet pipe is located on the side of the piston close to the spring, and the other end of the air outlet pipe is connected to the air inlet pipe of the scrubber body.

[0014] Furthermore, the top plug is threadedly connected to the valve body.

[0015] The beneficial effects of the utility model are:

[0016] 1) The utility model provides spiral fins inside the scrubber body and protrusions on the spiral fins. On the one hand, centrifugal force is used to separate the alkali liquid from the hydrogen. On the other hand, when the hydrogen circulates, it collides with the protrusions and captures the alkali liquid again. While achieving efficient purification of the hydrogen, the amount of pure water used is reduced.

[0017] 2) A packing layer is set between the liquid distributor and the spiral fins. The packing layer uses porous ball packing, which not only reduces the temperature of the hydrogen again, but also ensures the washing effect of the hydrogen.

[0018] 3) An air distribution plate is set between the packing layer and the spiral fins, so that the hydrogen can be evenly distributed and pass through the packing layer after flowing through the spiral fins, thereby making the contact between hydrogen and pure water more sufficient and uniform, thereby improving the washing efficiency.

[0019] 4) A heat exchanger is set on one side of the air inlet pipe to cool the hydrogen, which is beneficial to reduce the temperature of the gaseous alkali liquid carried in the hydrogen to the liquefaction point, making it easier to condense and remove the alkali liquid during the washing process.

[0020] 5) A pressure valve is installed on one side of the heat exchanger. Through the interaction of its internal structure, the pressure valve maintains a certain pressure on the hydrogen within the heat exchanger. This pressure helps to extend the heat exchange time of the hydrogen. Because the high-pressure hydrogen flows relatively slowly within the heat exchanger, it increases its contact time with the cooling medium and heat exchange efficiency. In addition, when the hydrogen passes through the pressure valve and enters the scrubber body, the regulating effect of the pressure valve increases the flow rate of the hydrogen to a certain extent. This increase in flow rate helps the spiral fins to more effectively separate the alkali liquid carried by the hydrogen. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Attachment Figure 1 The utility model is a structural schematic diagram of a water electrolysis hydrogen production scrubber.

[0022] Attachment Figure 2 This is a schematic diagram of the interior of a water electrolysis hydrogen production scrubber of the utility model.

[0023] Attachment Figure 3 The utility model is a schematic diagram of a gas distributor in a water electrolysis hydrogen production scrubber.

[0024] Attachment Figure 4 The utility model is a schematic diagram of spiral fins in a water electrolysis hydrogen production scrubber.

[0025] Attachment Figure 5 The utility model is a schematic diagram of a porous ball filler in a water electrolysis hydrogen production scrubber.

[0026] Attachment Figure 6 This is a cross-sectional view of a pressure valve in a water electrolysis hydrogen production scrubber of the utility model.

[0027] In the figure, 1. scrubber body; 11. support leg; 12. air inlet pipe; 13. exhaust pipe; 14. overflow pipe; 15. sewage pipe; 16. water inlet pipe; 2. gas distributor; 21. main pipe; 22. branch pipe; 3. spiral fin; 31. protrusion; 4. air distribution plate; 5. packing layer; 51. porous ball packing; 6. liquid distributor; 7. wire mesh demister; 8. pressure valve; 81. valve body; 82. air inlet; 83. piston; 84. spring; 85. top plug; 86. outlet pipe; 9. heat exchanger. DETAILED DESCRIPTION

[0028] The following will be combined with the Figures 1-6 The technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0029] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention.

[0030] like Figure 1 、 Figure 2 As shown, a water electrolysis hydrogen production scrubber includes a scrubber body 1, a support leg 11 is provided at the lower part of the scrubber body 1, an air inlet pipe 12 is provided on one side of the lower part of the scrubber body 1, one end of the air inlet pipe 12 extends to the inside of the scrubber body 1 and is connected to a gas distributor 2, and a water inlet pipe 16 is provided on one side of the upper part of the scrubber body 1, one end of the water inlet pipe 16 extends to the inside of the scrubber body 1 and is connected to a liquid distributor 6, as shown in FIG. Figure 3 As shown, the gas distributor 2 and the liquid distributor 6 each include a main pipe 21 and a plurality of branch pipes 22 arranged on both sides of the main pipe 21. The lower portion of the branch pipe 22 is provided with a through hole (not shown in the figure) for discharging gas or water. The lower end of the scrubber body 1 is provided with a drain pipe 15, the upper end of the scrubber body 1 is provided with an exhaust pipe 13, and one side of the scrubber body 1 is provided with an overflow pipe 14. When the liquid level inside the scrubber body 1 exceeds the normal operating liquid level, it flows out through the overflow pipe 14; the upper portion of the gas distributor 2 is provided with a spiral fin 3, as shown in FIG. Figure 4As shown, the spiral fin 3 is provided with a plurality of protrusions 31 on at least one surface. In this embodiment, the protrusions 31 are provided on the lower surface of the spiral fin 3. In other embodiments, the protrusions 31 can also be provided on the upper surface of the spiral fin 3 or on both the upper and lower surfaces. When the hydrogen passes through the spiral fin 3, a certain centrifugal force is generated to separate the alkali droplets entrained in the hydrogen. In addition, when the rising hydrogen encounters the spiral fin 3, it will collide with the fin and the protrusions 31 on the fin, which not only increases the contact area between the hydrogen and the fin, but also part of the alkali solution is captured by the protrusions 31, which can also separate the alkali droplets entrained in the hydrogen. A wire mesh demister 7 is provided on the upper part of the liquid distributor 6. The wire mesh demister 7 adheres and separates the small droplets carried in the rising hydrogen, thereby ensuring the effect of hydrogen washing.

[0031] Preferably, the height of the protrusions 31 is 5-10 mm, and the distance between adjacent protrusions 31 is not less than 10 mm. In order to ensure the capture effect of the protrusions 31 on the alkali solution, the protrusions 31 on the spiral fins 3 are staggered.

[0032] like Figure 2 As shown, a packing layer 5 is provided between the liquid distributor 6 and the spiral fins 3. As the hydrogen rises, it comes into contact with the pure water within the packing layer 5, achieving a highly efficient heat exchange process. This not only significantly reduces the temperature of the hydrogen to a predetermined range, ensuring that subsequent process steps are carried out under suitable temperature conditions, but also effectively avoids safety risks or product quality issues that may arise from excessively high temperatures. Furthermore, the design of the packing layer 5 increases the contact area and contact time between the hydrogen and the pure water, allowing any trace amounts of alkali liquid that may be entrained in the hydrogen to be more thoroughly washed away, significantly reducing residual alkali liquid and improving the purity of the hydrogen.

[0033] like Figure 5 As shown, the packing layer 5 uses porous spherical packing 51, which greatly increases the contact area between the hydrogen and the pure water. This increased contact area ensures that the alkaline solution in the hydrogen can more fully contact the pure water, thereby improving the washing efficiency and purification effect. In addition, due to the increased contact area, the heat exchange between the hydrogen and the pure water is more complete.

[0034] like Figure 2 As shown, an air distribution plate 4 is provided between the packing layer 5 and the spiral fins 3. The air distribution plate 4 is provided with a number of evenly distributed air distribution holes. The design of the air distribution holes on the air distribution plate 4 ensures that the hydrogen can be evenly distributed and pass through the packing layer 5 after flowing through the spiral fins 3. This uniform air distribution avoids the situation where the local flow rate of hydrogen in the packing layer 5 is too fast or too slow, so that the contact between hydrogen and pure water is more sufficient and uniform, thereby improving the washing efficiency.

[0035] like Figure 1As shown, a heat exchanger 9 is provided on one side of the air inlet pipe 12. The cooling medium inlet of the heat exchanger 9 is connected to an external water pipe or an overflow pipe 14. The heat exchanger 9 cools the hydrogen before hydrogen washing, which is beneficial to reduce the temperature of the gaseous alkali liquid carried in the hydrogen to the liquefaction point, making it easier for the alkali liquid to be condensed and removed during the washing process.

[0036] like Figure 1 、 Figure 6 As shown, a pressure valve 8 is provided on one side of the heat exchanger 9, and the pressure valve 8 includes a valve body 81. An air inlet 82 is provided on one side of the valve body 81, and the air inlet 82 is connected to the air outlet of the heat exchanger 9. A top plug 85 is provided on the other side of the valve body 81, and a spring 84 is provided on one side of the top plug 85. The other end of the spring 84 is connected to a piston 83. An air outlet pipe 86 is connected to the side wall of the valve body 81, and one end of the air outlet pipe 86 is located on the side of the piston 83 close to the spring 84, and the other end of the air outlet pipe 86 is connected to the air inlet pipe 12 of the scrubber body 1; the pressure valve 8 maintains a certain pressure of hydrogen in the heat exchanger 9 through the interaction of its internal structure. The existence of this pressure is conducive to extending the heat exchange time of the hydrogen, because the flow velocity of the hydrogen under high pressure in the heat exchanger 9 will be relatively slow, thereby increasing the contact time with the cooling medium and the heat exchange efficiency. In addition, when hydrogen enters the scrubber body 1 through the pressure valve 8, the flow rate of hydrogen will be increased to a certain extent due to the regulating effect of the pressure valve 8. This increase in flow rate is conducive to the spiral fins 3 to more effectively separate the alkali solution carried in the hydrogen.

[0037] like Figure 6 As shown, the top plug 85 is threadedly connected to the valve body 81 to facilitate adjustment of the elastic force of the spring 84, thereby adjusting the pressure of the hydrogen in the heat exchanger 9 and when entering the scrubber body 1.

[0038] During hydrogen scrubbing, hydrogen generated by the hydrolyzer is passed into the heat exchanger 9 for heat exchange. This lowers the temperature of the hydrogen and the alkali liquid it carries, which helps lower the temperature of the gaseous alkali liquid carried by the hydrogen to its liquefaction point. When the hydrogen pressure within the heat exchanger 9 exceeds the elastic force of the spring 84, the hydrogen pushes open the piston 83, and the pressurized hydrogen enters the scrubber body 1. It is first washed with water at the bottom of the scrubber body 1 (the water level is below the overflow pipe 14), and then spirals upward under the guidance of the spiral fins 3. During the upward movement, some alkali liquid is separated by centrifugal force, and some alkali liquid collides with the protrusions 31 of the spiral fins 3 and is captured by them. After preliminary separation, the hydrogen rises evenly to the packing layer 5 under the action of the gas distribution plate 4. There, it contacts the surface and internal pores of the porous ball packing 51 with pure water sprayed from above, undergoing a secondary water wash. This not only reduces the temperature of the hydrogen, but also removes the alkali liquid entrained in the hydrogen. After the second water wash, the hydrogen continues to rise and comes into direct contact with the pure water sprayed by liquid distributor 6, washing the hydrogen again. After multiple washes, the hydrogen passes through wire mesh demister 7 to separate the droplets, and then enters the hydrogen purification unit through exhaust pipe 13 for purification. The liquid at the bottom of the scrubber body 1 flows out of the scrubber through the overflow port for reuse, exits the scrubber through the drain port, or is reused as a cooling medium in heat exchanger 9. This achieves efficient hydrogen purification while significantly reducing water consumption during the scrubbing process.

[0039] The above content is merely an example and explanation of the structure of the present utility model. Technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the utility model or exceed the scope defined by the claims, they should all fall within the scope of protection of the present utility model.

Claims

1. A water electrolysis hydrogen production scrubber, comprising a scrubber body (1), wherein the scrubber body (1) is provided with a support leg (11) at the lower portion, an air inlet pipe (12) is provided on one side of the lower portion of the scrubber body (1), one end of the air inlet pipe (12) extends to the interior of the scrubber body (1) and is connected to a gas distributor (2), an upper side of the scrubber body (1) is provided with a water inlet pipe (16), one end of the water inlet pipe (16) extends to the interior of the scrubber body (1) and is connected to a liquid distributor (6), the gas distributor (2) and the liquid distributor (6) both comprise a main pipe (21) and a plurality of branch pipes (22) provided on both sides of the main pipe (21), the lower portion of the branch pipe (22) is provided with a through hole, the lower end of the scrubber body (1) is provided with a sewage pipe (15), the upper end of the scrubber body (1) is provided with an exhaust pipe (13), and one side of the scrubber body (1) is provided with an overflow pipe (14); characterized in that, The gas distributor (2) is provided with a spiral fin (3) on the upper part, and the spiral fin (3) is provided with a plurality of protrusions (31) on at least one surface; the liquid distributor (6) is provided with a wire mesh demister (7) on the upper part.

2. A water electrolysis hydrogen production scrubber according to claim 1, characterized in that: The height of the protrusions (31) is 5-10 mm, the spacing between adjacent protrusions (31) is not less than 10 mm, and the protrusions (31) on the spiral fins (3) are arranged in a staggered manner.

3. The electrolytic water hydrogen production scrubber according to claim 1, characterized in that: A packing layer (5) is provided between the liquid distributor (6) and the spiral fins (3).

4. A water electrolysis hydrogen production scrubber according to claim 3, characterized in that: The filler layer (5) uses porous spherical fillers (51).

5. The electrolytic water hydrogen production scrubber according to claim 3, characterized in that: An air distribution plate (4) is provided between the packing layer (5) and the spiral fins (3), and the air distribution plate (4) is provided with a plurality of evenly distributed air distribution holes.

6. A water electrolysis hydrogen production scrubber according to any one of claims 1 to 5, characterized in that: A heat exchanger (9) is provided on one side of the air inlet pipe (12), and a cooling medium inlet of the heat exchanger (9) is connected to an external water pipe or communicated with an overflow pipe (14).

7. The electrolytic water hydrogen production scrubber according to claim 6, characterized in that: A pressure valve (8) is provided on one side of the heat exchanger (9), and the pressure valve (8) includes a valve body (81). An air inlet (82) is provided on one side of the valve body (81), and the air inlet (82) is connected to the air outlet of the heat exchanger (9). A top plug (85) is provided on the other side of the valve body (81), and a spring (84) is provided on one side of the top plug (85). The other end of the spring (84) is connected to the piston (83). An air outlet pipe (86) is connected to the side wall of the valve body (81), and one end of the air outlet pipe (86) is located on the side of the piston (83) close to the spring (84). The other end of the air outlet pipe (86) is connected to the air inlet pipe (12) of the scrubber body (1).

8. The electrolytic water hydrogen production scrubber according to claim 7, characterized in that: The top plug (85) is threadedly connected to the valve body (81).

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