Alkaline electrolyzer hydrogen production system with gas-liquid pre-separation function

Abstract

The application discloses a hydrogen production system of an alkaline electrolytic cell with a gas-liquid pre-separation function, which comprises an electrolytic cell main body, a first gas-liquid separation device and a connecting pipeline, the electrolytic cell main body is provided with a reaction cavity; the first gas-liquid separation device is arranged in the reaction cavity and is used for pre-separating the gas and the liquid generated in the reaction, the first gas-liquid separation device is formed with a gas outlet and a liquid outlet, the gas outlet is located above the liquid level of the liquid in the first gas-liquid separation device, and the liquid outlet is located below the liquid level of the liquid in the first gas-liquid separation device; and the connecting pipeline comprises a gas conveying pipe and a liquid conveying pipe, the gas conveying pipe and the liquid conveying pipe are connected with the gas outlet and the liquid outlet respectively so as to convey the pre-separated gas and liquid respectively. The application solves the technical problem that the existing hydrogen production system of the alkaline electrolytic cell cannot effectively separate the gas and the liquid at the front end, thereby increasing the load of the subsequent separation equipment, influencing the circulation efficiency of the electrolyte and the purity of the gas product.

Description

Technical Field

[0001] This invention relates to the field of hydrogen production equipment technology, specifically to an alkaline electrolyzer hydrogen production system with gas-liquid pre-separation function. Background Technology

[0002] Alkaline electrolyzers are currently the mainstream choice for large-scale green hydrogen production. The main body of an alkaline electrolyzer typically consists of dozens to hundreds of electrolysis chambers stacked and connected in series. Each chamber contains key components such as plates, electrodes, and diaphragms. The electrolyte circulates within the chamber and undergoes an electrolytic reaction. The generated hydrogen or oxygen mixes with the electrolyte to form a gas-liquid two-phase mixture, which rises to a gas-liquid separation box at the top of the chamber, where gravity achieves initial gas-liquid separation. However, in existing alkaline electrolyzer hydrogen production systems, each electrolysis chamber's gas-liquid separation box only has a single side outlet. Both the initially separated gas and liquid flow out through this side outlet, causing them to remix upon passing through. This makes the pre-separation function of the gas-liquid separation box ineffective, increasing the load on subsequent separation equipment and negatively impacting the electrolyte circulation efficiency and the purity of the gaseous products. Therefore, there is an urgent need to design an alkaline electrolyzer hydrogen production system with gas-liquid pre-separation function to achieve effective separation of gas and liquid at the front end. Summary of the Invention

[0003] This invention provides an alkaline electrolyzer hydrogen production system with gas-liquid pre-separation function, which solves the technical problem that existing alkaline electrolyzer hydrogen production systems cannot effectively separate gas and liquid at the front end, thereby increasing the load on subsequent separation equipment, affecting the circulation efficiency of electrolyte and the purity of gas products.

[0004] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: An alkaline electrolyzer hydrogen production system with gas-liquid pre-separation function includes: An electrolytic cell body, wherein the electrolytic cell body has a reaction chamber; A first gas-liquid separation device is disposed in the reaction chamber for pre-separating the gas and liquid generated by the reaction. The first gas-liquid separation device has a gas outlet and a liquid outlet. The gas outlet is located above the liquid surface in the first gas-liquid separation device, and the liquid outlet is located below the liquid surface in the first gas-liquid separation device. The connecting pipeline includes a gas delivery pipe and a liquid delivery pipe, which are respectively connected to the gas outlet and the liquid outlet to deliver the pre-separated gas and liquid respectively.

[0005] In some embodiments, the electrolytic cell body includes a plurality of stacked unit cells, and the internal cavities of the plurality of unit cells are connected in series to form the reaction chamber.

[0006] In some embodiments, the first gas-liquid separation device includes a plurality of separation boxes, each of the separation boxes is disposed in the internal cavity of each unit slot, and each separation box is provided with a gas outlet and a liquid outlet.

[0007] In some embodiments, the gas supply pipe includes gas supply branch pipes and gas supply main pipe, with one end of each of the gas supply branch pipes connected to a plurality of gas outlets and the other end of each of the gas supply branch pipes connected to the gas supply main pipe.

[0008] In some embodiments, the infusion tubing includes infusion branch tubing and infusion main tubing, with one end of each of the plurality of infusion branch tubing connected to a plurality of infusion outlets and the other end of each of the plurality of infusion branch tubing connected to the infusion main tubing.

[0009] In some embodiments, the connecting pipeline further includes a return pipe, one end of which is connected to the bottom of the gas main pipe and the other end of which is connected to the liquid main pipe.

[0010] In some embodiments, the gas outlet and the liquid outlet are located on the same side of the first gas-liquid separation device.

[0011] In some embodiments, the air outlet is located on the top surface of the first gas-liquid separator, and the liquid outlet is located on the side surface of the first gas-liquid separator.

[0012] In some embodiments, a second gas-liquid separation device is further included, the second gas-liquid separation device having an air inlet and a liquid inlet, the air inlet being connected to the gas delivery pipe and the liquid inlet being connected to the liquid delivery pipe, for secondary separation of the pre-separated gas and liquid.

[0013] In some embodiments, the air inlet is disposed at the upper part of the second gas-liquid separator, and the liquid inlet is disposed at the lower part of the second gas-liquid separator.

[0014] Compared with the prior art, the beneficial effects of the present invention mainly include: This invention provides an alkaline electrolyzer hydrogen production system with gas-liquid pre-separation function. By setting separate outlets for gas and liquid discharge along the gas-liquid discharge path—namely, the gas outlet and liquid outlet set on the first gas-liquid separation device—the generated gas and liquid can be discharged separately through the gas outlet and liquid outlet, respectively. This avoids the situation in the prior art where only one outlet is set, causing the gas and liquid to remix at that outlet. Thus, the generated hydrogen and oxygen are effectively separated from the electrolyte at the front end, reducing the processing load of the subsequent gas-liquid separation terminal. At the same time, it avoids the interference of gas-liquid mixing on the electrolyte circulation, improves the electrolyte circulation efficiency, reduces the amount of electrolyte entrained in the gaseous products, and improves the purity of the gaseous products. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in this application, the accompanying drawings used in the embodiments will be briefly described below: Figure 1 This is a schematic diagram of the structure of the alkaline electrolyzer hydrogen production system described in this invention; Figure 2 This is a schematic diagram of the structure of the main body of the electrolytic cell described in this invention; Figure 3 This is a schematic diagram of the first arrangement of the air outlet and liquid outlet according to the present invention; Figure 4 This is a schematic diagram of the second arrangement of the air outlet and liquid outlet described in this invention; Figure 5 This is a schematic diagram of the third configuration of the air outlet and liquid outlet described in this invention.

[0016] As shown in the figure: 1. Electrolytic cell body; 101. Reaction chamber; 11. Unit cell; 2. First gas-liquid separation device, 201, gas outlet, 202, liquid outlet, 203, gas-liquid mixture outlet; 3. Connecting pipelines, 31. Gas supply pipe, 311. Gas supply branch pipe, 312. Gas supply main pipe, 32. Infusion pipe, 321. Infusion branch pipe, 322. Infusion main pipe, 33. Return pipe, 34. Exhaust pipe; 4. Second gas-liquid separation device, 401, air inlet, 402, liquid inlet, 403, gas outlet, 404, liquid outlet. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0018] In alkaline electrolyzer hydrogen production systems, the electrolyzer typically consists of multiple individual cells, each equipped with a gas-liquid separator. Inside this separator, the upper part contains the hydrogen or oxygen produced by electrolysis, while the lower part contains the electrolyte. The electrolyte accumulates at the bottom due to gravity, creating a liquid level. However, current gas-liquid separators typically have only one outlet, through which both the gas and liquid produced in the reaction are discharged. This causes the separated gas and liquid to remix at the outlet, hindering the separator's effective separation function. This not only increases the load on subsequent separation equipment but also negatively impacts the electrolyte circulation efficiency and the purity of the gaseous products.

[0019] To address the problems existing in the prior art, the present invention provides an alkaline electrolyzer hydrogen production system with gas-liquid separation function, which realizes independent and orderly discharge of gas and liquid, and can achieve effective pre-separation of gas and liquid at the front end of the system, thereby improving the stability of electrolyte circulation and the purity of gas products.

[0020] It should be noted that this invention uses a square electrolyzer, which is frequently used, as a specific embodiment to describe the structural composition and working principle of the invention in detail. It is understood that the working principle of alkaline electrolyzers of other shapes is the same as that of the hydrogen production system of the square electrolyzer described in this embodiment, so they will not be described again.

[0021] like Figure 1 As shown, this embodiment provides an alkaline electrolyzer hydrogen production system with gas-liquid pre-separation function, including an electrolyzer body 1, a first gas-liquid separation device 2, and a connecting pipeline 3. The electrolyzer body 1 has a reaction chamber 101. The first gas-liquid separation device 2 is disposed in the reaction chamber 101 and is used to pre-separate the gas and liquid generated by the reaction. The first gas-liquid separation device 2 has a gas outlet 201 and a liquid outlet 202. The gas outlet 201 is located above the liquid surface in the first gas-liquid separation device 2, and the liquid outlet 202 is located below the liquid surface in the first gas-liquid separation device 2. The connecting pipeline 3 includes a gas delivery pipe 31 and a liquid delivery pipe 32. The gas delivery pipe 31 and the liquid delivery pipe 32 are respectively connected to the gas outlet 201 and the liquid outlet 202 to respectively deliver the pre-separated gas and liquid.

[0022] Thus, the alkaline electrolyzer hydrogen production system with gas-liquid pre-separation function provided by the present invention sets separate outlets for gas and liquid discharge along the gas-liquid discharge path. Specifically, it sets separate gas outlet 201 and liquid outlet 202 on the first gas-liquid separation device 2, with the gas outlet 201 located above the liquid surface in the first gas-liquid separation device 2 and the liquid outlet 202 located below the liquid surface in the first gas-liquid separation device 2. This allows the gas floating on the top and the liquid remaining at the bottom of the first gas-liquid separation device 2 due to gravity to be discharged through the gas outlet 201 and the liquid outlet 202 respectively. This avoids the situation in the prior art where only one outlet is set, causing the gas and liquid to remix at that outlet. This achieves the purpose of effectively separating the generated hydrogen and oxygen from the electrolyte at the front end, reducing the processing load of the subsequent gas-liquid separation terminal. At the same time, it avoids the interference of gas-liquid mixing on the electrolyte circulation, improves the electrolyte circulation efficiency, reduces the amount of electrolyte entrained in the gaseous product, and improves the purity of the gaseous product.

[0023] In one preferred embodiment, such as Figure 2As shown, the main body 1 of the electrolytic cell includes multiple stacked unit cells 11. The internal cavities of the multiple unit cells 11 are connected in series to form the reaction chamber 101. Each unit cell 11 typically has an inlet on one side of its bottom for introducing electrolyte. In this embodiment, the pre-separated liquid flows back to the unit cell 11 through the outlet 202 for recycling, while the returned electrolyte flows back to the unit cell 11 through the inlet.

[0024] In this embodiment, the operating temperature of the unit tank 11 is typically between 70 and 90°C, the operating pressure range is 0.1 to 3.0 MPa, and its current density is typically less than 0.8 A / M. 2 Through material and structural innovation, the current density of some advanced products has exceeded 10,000 A / M. 2 The hydrogen production capacity of the unit cell 11 is between 4 and 5 kWh / m³ during operation, and its hydrogen production is relatively large, reaching 2000 to 3000 M³. 3 The overall hydrogen production efficiency is between 62% and 82% per hour.

[0025] In one preferred embodiment, the first gas-liquid separation device 2 includes a plurality of separation boxes, and each of the unit slots 11 has a separation box in its internal cavity. Each separation box has an air outlet 201 and a liquid outlet 202.

[0026] In this embodiment, the separation box is highly integrated in the unit groove 11, and is made of alkali-resistant, high-temperature-resistant and corrosion-resistant stainless steel material, and is equipped with a high-precision sealing gasket to ensure that the separation box can operate stably and leak-free for a long time.

[0027] After the electrolysis reaction occurs in unit tank 11, the mixed fluid slows down in the separation box due to gravity or the principle of vortex flow. The gas rises to the gas outlet 201 and is discharged, while the liquid sinks to the bottom of the separation box, accumulating to form a liquid level of a certain height. The liquid outlet 202 is located below this liquid level, and the liquid is discharged from the liquid outlet 202. It should be noted that valves can be installed on the gas outlet 201 and the liquid outlet 202 to control the discharge of gas and liquid. The gas outlet 201 is connected to the gas supply pipe 31, and the liquid outlet 202 is connected to the liquid supply pipe 32.

[0028] In one preferred embodiment, the gas supply pipe 31 includes gas supply branch pipes 311 and gas supply main pipe 312. One end of each of the gas supply branch pipes 311 is connected to a plurality of gas outlets 201, and the other end is connected to the gas supply main pipe 312. That is, each gas outlet 201 on the separation box is connected to a gas supply branch pipe 311, and all the gas supply branch pipes 311 connected to the gas outlets 201 of all separation boxes are connected to a gas supply main pipe 312. In this way, the hydrogen or oxygen separated from each separation box is collected into the gas supply main pipe 312 through its respective gas outlet 201 and gas supply branch pipe 311, and then transported by the gas supply main pipe 312 to subsequent equipment for secondary separation.

[0029] In one preferred embodiment, the infusion tube 32 includes infusion branch tubes 321 and infusion main tube 322. One end of each of the multiple infusion branch tubes 321 is connected to a multiple of the outlets 202, and the other end is connected to the infusion main tube 322. That is, each outlet 202 on the separation box is connected to an infusion branch tube 321, and all the infusion branch tubes 321 connected to the outlets 202 of all the separation boxes are connected to a common infusion main tube 322. In this way, the liquid separated from each separation box is collected into the infusion main tube 322 through its respective outlet 202 and infusion branch tube 321, and then transported by the infusion main tube 322 to subsequent equipment for secondary separation to separate the gas mixed in the liquid.

[0030] Although an outlet 201 and a gas supply branch pipe 311 are provided, the initially separated gas will still carry a small amount of electrolyte. This small amount of electrolyte will accumulate at the bottom of the gas supply main pipe 312. Therefore, in one preferred embodiment, the connecting pipe 3 also includes a return pipe 33. One end of the return pipe 33 is connected to the bottom of the gas supply main pipe 312, and the other end is connected to the liquid supply main pipe 322. In this way, the electrolyte accumulated at the bottom of the gas supply main pipe 312 can flow to the liquid supply main pipe 322 through the return pipe 33.

[0031] In one preferred embodiment, the gas collected in the gas main 312 and the liquid collected in the liquid main 322 are both connected to a subsequent gas-liquid separator for complete separation. Therefore, the hydrogen production system of the present invention also includes a second gas-liquid separator 4 for complete separation of the pre-separated gas and liquid.

[0032] In one preferred embodiment, the second gas-liquid separation device 4 has an air inlet 401 and a liquid inlet 402. The air inlet 401 is connected to the gas delivery pipe 31, specifically to the main gas delivery pipe 312, and the liquid inlet 402 is connected to the liquid delivery pipe 32, specifically to the main liquid delivery pipe 322, for secondary separation of the pre-separated gas and liquid.

[0033] In one preferred embodiment, the air inlet 401 is disposed at the upper part of the second gas-liquid separator 4, and the liquid inlet 402 is disposed at the lower part of the second gas-liquid separator 4.

[0034] In one preferred embodiment, the second gas-liquid separation device 4 is a gas-liquid separation tank. A gas discharge port 403 is provided at the top of the gas-liquid separation tank, and a liquid discharge port 404 is provided at the bottom of the gas-liquid separation tank. The gas discharged through the gas discharge port 403 is a hydrogen product, which can be collected for later use. The liquid discharged through the liquid discharge port 404 can be recycled back to the unit tank 11 through a pipeline.

[0035] In one preferred embodiment, a wire mesh demister is also provided at the gas discharge port 403 of the second gas-liquid separation device 4.

[0036] In one preferred embodiment, such as Figure 3 As shown, the gas outlet 201 and the liquid outlet 202 can be located on the same side of the first gas-liquid separation device 2.

[0037] In one preferred embodiment, such as Figure 4 As shown, the air outlet 201 can also be opened on the top surface of the first gas-liquid separator 2, while the liquid outlet 202 is opened on the side of the first gas-liquid separator 2.

[0038] In one preferred embodiment, such as Figure 5 As shown, to achieve the technical objective of this invention, only one gas-liquid mixing outlet 203 can be provided on the first gas-liquid separation device 2. That is, a gas-liquid mixing outlet 203 is provided on one side of each separation box. Each gas-liquid mixing outlet 203 is connected to a liquid delivery branch pipe 321. All liquid delivery branch pipes 321 are connected to the liquid delivery main pipe 322. An exhaust pipe 34 is provided near the outlet of the liquid delivery main pipe 322 to separate the gas in the electrolyte.

[0039] This invention employs a multi-level gradient stratification along the gas-liquid discharge path to ensure that the gas and liquid do not re-converge after separation. The specific working principle includes the following process: 1. First-stage separation achieves stratification of the "static liquid level" inside the gas-liquid separation box. The electrolysis reaction generates a large amount of gas (H2 or O2) in unit tank 11, which carries the electrolyte upward into the first gas-liquid separator 2 at the top. Due to the high gas flow rate and slow liquid return, a stable dynamic liquid level is naturally maintained in the first gas-liquid separator 2. This invention breaks away from the traditional design of setting a single outlet on the side of the separation device. On the side wall of the first gas-liquid separator 2, differentiated openings are made according to the liquid level height. That is, a gas outlet 201 is opened above the liquid level (allowing only gas to pass through), while a liquid outlet 202 is opened below the liquid level (allowing only liquid to pass through). Thus, the gas and liquid are physically separated the instant they leave the first gas-liquid separator 2, completely eliminating the phenomenon of "liquid at the outlet being entrained by gas to form a jet and undergoing secondary mixing" in the traditional structure.

[0040] 2. Second-stage separation to achieve "high-low" spatial gravity settling of the gas main pipe 312 and the liquid main pipe 322. The separated gas and liquid enter their respective independent branch pipes and converge into the main pipes arranged at different height levels, namely, the gas supply branch pipe 311 and the liquid supply branch pipe 321, and then converge into the gas supply main pipe 312 and the liquid supply main pipe 322. The gas supply main pipe 312 is installed at the top of the electrolytic cell body 1, and the liquid supply main pipe 322 is installed below the electrolytic cell body 1. This height difference design ensures that even if a very small amount of mist-like electrolyte is carried along during the gas's ascent, these droplets will fall back due to gravity as they rise to the higher main pipe, or adhere to the pipe wall and flow downstream. To address the unavoidable accumulation of a small amount of condensate at the bottom of the gas supply main pipe 312, this invention connects a return pipe 33 to the lowest point of the gas supply main pipe 312, using gravity to automatically guide this accumulated liquid to the lower liquid supply main pipe 322, realizing the "self-draining" function of the gas phase pipeline and preventing liquid blockage.

[0041] 3. The "lateral tangential" inlet layout of the second gas-liquid separator 4 Independent gas supply main 312 and liquid supply main 322 are connected to the upper and lower sides of the second gas-liquid separator 4, respectively. Gas enters the upper space of the second gas-liquid separator 4 from the upper air inlet 401; liquid enters the bottom liquid pool of the second gas-liquid separator 4 directly from the liquid inlet 402. The two do not mix or collide, avoiding the generation of a large number of secondary entrained droplets by the high-speed airflow impacting the liquid surface, thereby protecting the wire mesh demister at the top.

[0042] In another alternative embodiment of the present invention, the gas outlet 201 can be directly opened at the top of the unit tank 11. Taking advantage of the fact that the density of hydrogen / oxygen is much lower than that of air and electrolyte, the gas can be allowed to escape in a "straight line", with the shortest path and the least amount of entrainment.

[0043] In another alternative of the present invention, the first gas-liquid separation device 1 is provided with only one gas-liquid mixing outlet 203. This solution cleverly uses the infusion main pipe 322 as a "secondary gravity settling chamber". When the mixture flows through the infusion main pipe 322, the gas automatically floats to the top. An exhaust pipe 34 is added at the end of the infusion main pipe 322 near the outlet to "intercept" and draw out the pure gas at the top, which can also achieve pre-separation.

[0044] The alkaline electrolyzer hydrogen production system with gas-liquid pre-separation function provided by this invention has the following beneficial effects: 1. By setting up independent flow channels located above and below the liquid surface, the first gas-liquid separation device 2 truly becomes a "separator" rather than a "mixing chamber", cutting off the momentum exchange between gas and liquid at the source and laying the physical foundation for subsequent purification; 2. The load on the subsequent second gas-liquid separator 4 is reduced, which greatly reduces the processing pressure on the downstream equipment. Since more than 80% of the electrolyte is diverted and intercepted at the front end, the amount of liquid entrained in the second gas-liquid separator 4 is significantly reduced, which allows the volume of the second gas-liquid separator 4 to be designed to be smaller or the processing capacity to be improved, thereby reducing the overall energy consumption of the system and the manufacturing cost of the separation equipment, and improving the compactness of the entire hydrogen production system. 3. It can improve the circulation efficiency and stability of the electrolyte. Gas no longer "push" the electrolyte through the outlet pipe. The outlet pipe is a pure liquid phase flow, which reduces the flow resistance and stabilizes the flow rate. This ensures the liquid level balance of each unit cell 11 and the stable pressure difference across the ion exchange membrane, extends the service life of the electrolytic cell, and avoids drastic changes in cell voltage caused by liquid level fluctuations. 4. Reduce the amount of alkaline solution entrained in the gas products, significantly improve the purity of the gas products, and the gas phase follows an independent "high-level channel" with a reflux pipe to remove condensate. The water and alkali content of hydrogen / oxygen before entering subsequent processes (such as purification and compression) is greatly reduced, which reduces the adsorbent consumption and energy consumption of gas post-processing (such as drying and deoxygenation). 5. Easy to modify and adaptable to existing stacked structures. The core modification of this invention lies in the routing of the pipeline connection and the position of the branch pipe opening. There is no need to change the internal electrode structure of the unit cell 11. Thus, it can be directly used for the technical transformation and upgrading of existing square alkaline electrolytic cells, with a short implementation cycle and high return on investment.

[0045] In summary, the alkaline electrolyzer hydrogen production system with gas-liquid pre-separation function provided by this invention, by setting separate outlets for gas and liquid discharge along the gas-liquid discharge path, namely the gas outlet 201 and liquid outlet 202 set on the first gas-liquid separation device, enables the generated gas and liquid to be discharged through the gas outlet 201 and liquid outlet 202 respectively. This avoids the situation in the prior art where only one outlet is set, causing the gas and liquid to remix at that outlet. Thus, the generated hydrogen and oxygen are effectively separated from the electrolyte at the front end, reducing the processing load of the subsequent gas-liquid separation terminal. At the same time, it avoids the interference of gas-liquid mixing on the electrolyte circulation, improves the electrolyte circulation efficiency, reduces the amount of electrolyte entrained in the gaseous product, and improves the purity of the gaseous product.

[0046] The specific embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any other corresponding changes and modifications made in accordance with the technical concept of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. An alkaline electrolyzer hydrogen production system with gas-liquid pre-separation function, characterized in that, include: An electrolytic cell body, wherein the electrolytic cell body has a reaction chamber; A first gas-liquid separation device is disposed in the reaction chamber for pre-separating the gas and liquid generated by the reaction. The first gas-liquid separation device has a gas outlet and a liquid outlet. The gas outlet is located above the liquid surface in the first gas-liquid separation device, and the liquid outlet is located below the liquid surface in the first gas-liquid separation device. The connecting pipeline includes a gas delivery pipe and a liquid delivery pipe, which are respectively connected to the gas outlet and the liquid outlet to deliver the pre-separated gas and liquid respectively.

2. The alkaline electrolyzer hydrogen production system with gas-liquid pre-separation function according to claim 1, characterized in that, The main body of the electrolytic cell includes multiple stacked unit cells, and the internal cavities of the multiple unit cells are connected in series to form the reaction chamber.

3. The alkaline electrolyzer hydrogen production system with gas-liquid pre-separation function according to claim 2, characterized in that, The first gas-liquid separation device includes multiple separation boxes. Each separation box is provided in the internal cavity of each unit tank. Each separation box is provided with a gas outlet and a liquid outlet.

4. The alkaline electrolyzer hydrogen production system with gas-liquid pre-separation function according to claim 3, characterized in that, The gas transmission pipe includes gas transmission branch pipes and gas transmission main pipe. One end of each of the gas transmission branch pipes is connected to a plurality of gas outlets, and the other end of each of the branch pipes is connected to the gas transmission main pipe.

5. The alkaline electrolyzer hydrogen production system with gas-liquid pre-separation function according to claim 4, characterized in that, The infusion tubing includes infusion branch tubes and an infusion main tube. One end of each of the multiple infusion branch tubes is connected to a multiple of the infusion outlets, and the other end of each branch tube is connected to the infusion main tube.

6. The alkaline electrolyzer hydrogen production system with gas-liquid pre-separation function according to claim 5, characterized in that, The connecting pipeline also includes a return pipe, one end of which is connected to the bottom of the gas main pipe and the other end of which is connected to the liquid main pipe.

7. The alkaline electrolyzer hydrogen production system with gas-liquid pre-separation function according to claim 1, characterized in that, The gas outlet and liquid outlet are located on the same side of the first gas-liquid separation device.

8. The alkaline electrolyzer hydrogen production system with gas-liquid pre-separation function according to claim 1, characterized in that, The air outlet is located on the top surface of the first gas-liquid separator, and the liquid outlet is located on the side surface of the first gas-liquid separator.

9. The alkaline electrolyzer hydrogen production system with gas-liquid pre-separation function according to any one of claims 1 to 8, characterized in that, It also includes a second gas-liquid separation device, which has an air inlet and a liquid inlet. The air inlet is connected to the gas delivery pipe, and the liquid inlet is connected to the liquid delivery pipe, for secondary separation of the pre-separated gas and liquid.

10. The alkaline electrolyzer hydrogen production system with gas-liquid pre-separation function according to claim 9, characterized in that: The air inlet is located at the upper part of the second gas-liquid separator, and the liquid inlet is located at the lower part of the second gas-liquid separator.

Images