Hydrogen washing cooler for hydrogen production through alkaline electrolysis of water
By designing a hydrogen washing and cooling cooler with integrated hydrogen washing and cooling functions, the problems of inconvenience and low efficiency caused by the separation of hydrogen washing and cooling in the existing technology are solved, efficient washing and cooling of hydrogen are achieved, and production efficiency and purity are improved.
Patent Information
- Application Number
- CN202423025118.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-09
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-12-09
AI Technical Summary
In the prior art, hydrogen scrubbing and cooling in the alkaline water electrolysis hydrogen production process are completed by two separate devices, which makes operation and management inconvenient and leads to low production efficiency.
A hydrogen scrubbing cooler integrating hydrogen scrubbing and cooling functions is designed. A uniform air distribution device, a cooling and heat exchange device, a multi-layer demister and a water mist spraying device are used to achieve hydrogen scrubbing and cooling in one device.
The integration of hydrogen scrubbing and cooling is achieved, which improves the convenience of operation management and production efficiency, ensures hydrogen purity and reduces temperature.
Smart Images
Figure CN223474688U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of hydrogen production equipment technology, and in particular to a hydrogen scrubbing cooler for producing hydrogen through alkaline water electrolysis. Background Technology
[0002] Hydrogen is the most widely distributed carbon-based energy source in nature, characterized by high energy density, low combustion temperature, and cleanliness. Currently, the main technology for hydrogen production is water electrolysis, which obtains high-purity hydrogen by electrolyzing an alkaline aqueous solution. However, after gas-liquid separation in a gas-liquid separator, the hydrogen gas remains at a high temperature and contains a small amount of alkaline solution, requiring washing and cooling. Currently, hydrogen washing and cooling are performed using two separate devices, which is inconvenient to operate and manage, resulting in low production efficiency. Utility Model Content
[0003] The technical objective of this utility model is to provide a hydrogen scrubbing cooler for alkaline water electrolysis hydrogen production, addressing the shortcomings of the prior art. This hydrogen scrubbing cooler integrates hydrogen scrubbing and cooling, is easy to operate and manage, and has high production efficiency.
[0004] The technical solution adopted by this utility model to solve its technical problem is as follows: it includes a shell and a washing liquid inlet pipe, a washing liquid outlet pipe, a hydrogen inlet pipe, and a hydrogen outlet pipe disposed on the shell. A uniform gas distribution device is disposed inside the shell and is connected to the hydrogen inlet pipe. A cooling heat exchange device is disposed inside the shell. A first demister and a second demister are disposed inside the shell above the uniform gas distribution device. The second demister is located above the first demister. A water mist spraying device is disposed between the first demister and the second demister.
[0005] The cooling heat exchange device includes a cooling heat exchange coil, a cooling water inlet pipe, and a cooling water outlet pipe. The cooling water inlet pipe and the cooling water outlet pipe are located on the shell, and the cooling water inlet pipe is connected to the lower end of the cooling heat exchange coil, while the cooling water outlet pipe is connected to the upper end of the cooling heat exchange coil.
[0006] The uniform gas distribution device adopts the form of an inverted funnel. The bottom of the funnel is a circular perforated plate with small holes evenly distributed on it. The diameter of the small holes on the circular perforated plate is 500μm and the porosity is 50%.
[0007] An inclined perforated plate is provided between the water mist spraying device and the first demister. The inclined perforated plate has multiple vertical holes. The outer periphery of the inclined perforated plate is fixed to the inner wall of the shell. A water groove is opened at the lowest point of the inclined perforated plate.
[0008] The water mist spraying device includes a water mist inlet pipe, a water mist spraying branch pipe, and a water mist nozzle. The water mist inlet pipe is equipped with multiple water mist spraying branch pipes, and each water mist spraying branch pipe is equipped with multiple water mist nozzles.
[0009] The first demister consists of multiple baffles, which are C-shaped and evenly arranged from left to right.
[0010] The second demister is composed of multiple baffles, which are S-shaped and evenly arranged from left to right.
[0011] Compared with existing technologies, this utility model's hydrogen scrubbing and cooling device for alkaline water electrolysis hydrogen production has the following outstanding advantages: It centralizes hydrogen scrubbing and cooling into a single device, employing a liquid-phase plus gas-phase scrubbing method. This allows for the complete washing and cooling of hydrogen within a single unit, dissolving trace amounts of alkali in the water, ensuring hydrogen purity, and simultaneously reducing hydrogen temperature. Operation and management are convenient, and production efficiency is high. The uniform gas distribution device adopts an inverted funnel design. The large internal space of the funnel ensures consistent gas pressure and flow rate at all orifices, resulting in uniform gas distribution and thorough mixing of hydrogen and scrubbing liquid for excellent scrubbing effect. Within the gas phase space, the addition of an inclined orifice plate further obstructs the flow, making the water mist distribution denser and more uniform, allowing for more thorough contact between hydrogen and water mist, thus improving the hydrogen scrubbing effect. Attached Figure Description
[0012] Appendix Figure 1 This is a schematic diagram of a hydrogen scrubbing cooler used for hydrogen production via alkaline water electrolysis.
[0013] Appendix Figure 2 This is a schematic diagram of the uniform air distribution device;
[0014] Appendix Figure 3 This is a schematic diagram of the circular perforated plate structure of a uniform air distribution device.
[0015] Appendix Figure 4 This is a top view of the inclined perforated plate.
[0016] Explanation of reference numerals in the attached drawings: 1. Washing liquid outlet pipe; 2. Uniform gas distribution device; 21. Circular orifice plate; 22. Small hole; 3. Cooling water inlet pipe; 4. Cooling heat exchange coil; 5. Cooling water outlet pipe; 6. Washing liquid inlet pipe; 7. Hydrogen inlet pipe; 8. First demister; 9. Inclined orifice plate; 91. Vertical hole; 92. Water trough; 10. Water mist nozzle; 11. Water mist spray branch pipe; 12. Water mist inlet pipe; 13. Second demister; 14. Hydrogen outlet pipe; 15. Shell. Detailed Implementation
[0017] Refer to the instruction manual appendix Figure 1 To be continued Figure 4The following is a detailed description of a hydrogen scrubbing cooler for producing hydrogen through alkaline water electrolysis according to this utility model.
[0018] This utility model discloses a hydrogen scrubbing and cooling device for alkaline water electrolysis to produce hydrogen. Its structure includes a shell 15 and a scrubbing liquid inlet pipe 6, a scrubbing liquid outlet pipe 1, a hydrogen inlet pipe 7, and a hydrogen outlet pipe 14 disposed on the shell 15. The scrubbing liquid outlet pipe 1 is located at the bottom of the shell 15, and the hydrogen outlet pipe 14 is located at the top of the shell 15. A uniform gas distribution device 2 is disposed inside the shell, located in the lower middle part of the shell cavity. The uniform gas distribution device 2 is connected to the hydrogen inlet pipe 7, which is located in the middle of the shell 15. A cooling and heat exchange device is disposed inside the shell, surrounding the uniform gas distribution device 2. Above the uniform gas distribution device 2, inside the shell, a first demister 8 and a second demister 13 are disposed. The second demister 13 is located above the first demister 8, and a water mist spraying device is disposed between the first demister 8 and the second demister 13.
[0019] The cooling heat exchange device includes a cooling heat exchange coil 4, a cooling water inlet pipe 3, and a cooling water outlet pipe 5. The cooling water inlet pipe 3 and the cooling water outlet pipe 5 are located on the shell 15, and the cooling water inlet pipe 5 is connected to the lower end of the cooling heat exchange coil 4, while the cooling water outlet pipe 5 is connected to the upper end of the cooling heat exchange coil 4.
[0020] The uniform gas distribution device 2 adopts the form of an inverted funnel. The bottom of the funnel is a circular perforated plate 21. The circular perforated plate 21 is evenly distributed with small holes 22. The diameter of the small holes 22 on the circular perforated plate 21 is 500μm and the porosity is 50%.
[0021] An inclined perforated plate 9 is provided between the water mist spraying device and the first demister 8. The inclined perforated plate 9 is provided with a plurality of vertical holes 91. The outer periphery of the inclined perforated plate 9 is fixed to the inner wall of the shell. A water groove 92 is opened at the lowest point of the inclined perforated plate 9.
[0022] The water mist spraying device includes a water mist inlet pipe 12, a water mist spraying branch pipe 11, and a water mist nozzle 10. The water mist inlet pipe 12 is provided with multiple water mist spraying branch pipes 11, and each water mist spraying branch pipe 11 is provided with multiple water mist nozzles 10.
[0023] The first demister 8 consists of multiple baffles, which are C-shaped and evenly arranged from left to right.
[0024] The second demister 13 consists of multiple baffles, which are S-shaped and evenly arranged from left to right.
[0025] Hydrogen produced by alkaline water electrolysis undergoes gas-liquid separation in a gas-liquid separator. The resulting hydrogen is at a high temperature and contains a small amount of alkaline solution. Therefore, the hydrogen needs to be washed and cooled. It enters the hydrogen washing and cooling unit through the hydrogen inlet pipe 7 and is evenly distributed into the liquid phase space of the washing and cooling unit via the uniform gas distribution device 2. The inner cavity of the shell is divided into a lower liquid phase space and an upper gas phase space. In the liquid phase space, hydrogen is ejected through the uniform gas distribution device 2 to form a microbubble flow. The microbubbles fully contact and mix with the washing liquid in the lower part of the shell cavity for the first washing. The washing liquid is demineralized water. A cooling heat exchange coil 4 is installed in the liquid phase space, and external cooling water cools the hydrogen through the cooling heat exchange coil 4. After cooling, the hydrogen microbubbles rise from the liquid phase space due to buoyancy and overflow into the first demister 8 formed by the C-shaped baffle plate. Due to the inertial impact of the gas, the water mist collides with the corrugated plate and condenses into droplets, which are then intercepted. The hydrogen continues to rise and passes through the vertical holes of the inclined perforated plate 9 into the gas phase space. Within the gas phase space, the demineralized water mist sprayed by the water mist ejector is more densely and uniformly distributed due to the obstruction of the inclined orifice plate 9, resulting in closer contact between hydrogen and water mist. The water mist fully absorbs the residual alkali solution in the hydrogen. When the hydrogen and water mist carrying residual alkali solution rise and pass through the second demister 13 formed by the S-shaped baffle plate, the water mist carrying residual alkali solution is fully intercepted by the second demister 13, allowing the hydrogen to enter the upper pure hydrogen space and flow out through the hydrogen outlet pipe 14. Within the gas phase space, the water droplets formed by the interception of the water mist carrying residual alkali solution by the second demister 13 due to gravity detach from the second demister 13, forming raindrops. These raindrops fall onto the inclined orifice plate 9 and converge into small streams on its surface. Under the influence of the inclination, they flow to the lowest point of the inclined orifice plate 9, passing through the water tank 92. From there, they flow down the inner wall of the casing to the liquid phase space, merging with the liquid washing liquid. The merged washing liquid then flows out through the washing liquid outlet pipe 1.
[0026] The embodiments listed above are for understanding the present utility model only and are not intended to limit the technical solutions described herein. Those skilled in the art can make various changes or modifications based on the technical solutions described in the claims, and all equivalent changes or modifications should be covered within the scope of protection of the claims of the present utility model. Any aspects not detailed in the present utility model are well-known to those skilled in the art.
Claims
1. A hydrogen scrubbing cooler for alkaline water electrolysis to produce hydrogen, comprising a shell and a scrubbing liquid inlet pipe, a scrubbing liquid outlet pipe, a hydrogen inlet pipe, and a hydrogen outlet pipe disposed on the shell, characterized in that: The housing is equipped with a uniform gas distribution device, which is connected to a hydrogen inlet pipe. The housing is also equipped with a cooling heat exchange device. Above the uniform gas distribution device, the housing is equipped with a first demister and a second demister. The second demister is located above the first demister. A water mist spraying device is provided between the first demister and the second demister.
2. A hydrogen scrubbing cooler for alkaline water electrolysis to produce hydrogen according to claim 1, characterized in that: The cooling heat exchange device includes a cooling heat exchange coil, a cooling water inlet pipe, and a cooling water outlet pipe. The cooling water inlet pipe and the cooling water outlet pipe are located on the shell, and the cooling water inlet pipe is connected to the lower end of the cooling heat exchange coil, while the cooling water outlet pipe is connected to the upper end of the cooling heat exchange coil.
3. A hydrogen scrubbing cooler for alkaline water electrolysis to produce hydrogen according to claim 1, characterized in that: The uniform air distribution device adopts the form of an inverted funnel, with a circular perforated plate at the bottom of the funnel, and small holes evenly distributed on the circular perforated plate.
4. A hydrogen scrubbing cooler for alkaline water electrolysis to produce hydrogen according to claim 3, characterized in that: The diameter of the pores on the circular perforated plate is 500 μm, and the porosity is 50%.
5. A hydrogen scrubbing cooler for alkaline water electrolysis to produce hydrogen according to claim 1, characterized in that: An inclined perforated plate is provided between the water mist spraying device and the first demister. The inclined perforated plate has multiple vertical holes. The outer periphery of the inclined perforated plate is fixed to the inner wall of the shell. A water groove is opened at the lowest point of the inclined perforated plate.
6. A hydrogen scrubbing cooler for alkaline water electrolysis to produce hydrogen according to claim 1, characterized in that: The water mist spraying device includes a water mist inlet pipe, a water mist spraying branch pipe, and a water mist nozzle. The water mist inlet pipe is equipped with multiple water mist spraying branch pipes, and each water mist spraying branch pipe is equipped with multiple water mist nozzles.
7. A hydrogen scrubbing cooler for alkaline water electrolysis to produce hydrogen according to claim 1, characterized in that: The first demister consists of multiple baffles, which are C-shaped and evenly arranged from left to right.
8. A hydrogen scrubbing cooler for alkaline water electrolysis to produce hydrogen according to claim 1, characterized in that: The second demister is composed of multiple baffles, which are S-shaped and evenly arranged from left to right.