Water electrolysis hydrogen production condensate water nondestructive recovery gas-liquid treatment device

Abstract

The utility model discloses a water electrolysis hydrogen production condensate water nondestructive recovery gas-liquid treatment device which comprises an electrolytic cell, an oxygen-liquid separation tank, a hydrogen-liquid separation tank, an oxygen scrubber, a hydrogen scrubber, an oxygen gas cooler, a hydrogen gas cooler, an oxygen secondary gas-liquid separator and a hydrogen secondary gas-liquid separator, and the oxygen-liquid separation tank is connected with the electrolytic cell through a pipeline; the hydrogen-liquid separation tank is connected with the electrolytic bath through a pipeline, and the hydrogen-liquid separation tank is connected with the oxygen-liquid separation tank through a pipeline; the oxygen washer is connected with the oxygen-liquid separation tank through a pipeline; the hydrogen washer is connected with the hydrogen-liquid separation tank through a pipeline; the oxygen cooler is connected with the oxygen washer through a pipeline, and the oxygen cooler is connected with the oxygen-liquid separation tank through a pipeline; and the hydrogen gas cooler is connected with the hydrogen washer through a pipeline. The weakly alkaline condensate water recovery device can solve the problems that an existing weakly alkaline condensate water recovery device is poor in safety, complex in structure and not environmentally friendly.

Description

Technical Field

[0001] This application relates to the field of hydrogen production technology by water electrolysis, and in particular to a device for non-destructive recovery of gas-liquid treatment of condensate from hydrogen production by water electrolysis. Background Technology

[0002] With the booming development of the hydrogen energy industry, water electrolysis hydrogen production technology, due to its green and environmentally friendly characteristics, has been widely used in industry, energy, and other fields. However, during the hydrogen production process, alkaline water electrolysis hydrogen production equipment typically produces hydrogen and oxygen carrying large amounts of water vapor and alkaline mist. Upon cooling, this water vapor and alkaline mist condense into weakly alkaline condensate. Therefore, it is necessary to treat this weakly alkaline condensate. Currently, there are three main methods for treating this weakly alkaline condensate:

[0003] Method 1: Directly discharge the generated weakly alkaline condensate into the sewage treatment pond;

[0004] Method 2: First, collect the generated weakly alkaline condensate into a container, then use an external power pump to recover the weakly alkaline condensate into the water supply tank, and then use the water supply pump to recover the water in the water supply tank into the system.

[0005] Method 3: The generated weakly alkaline condensate is quantitatively returned to the gas-liquid separation tank of the gas-liquid treatment device through a valve inside the gas-liquid treatment device.

[0006] The first method, direct discharge, will cause environmental pollution, and long-term discharge will lead to the depletion of electrolytes (potassium hydroxide) in the system. The second method, collecting weakly alkaline water, poses certain safety hazards. This is because hydrogen or oxygen can easily accumulate during the collection of weakly alkaline water, which can easily explode upon encountering static electricity, and the entire system is complex and costly. The third method, if the control interlock or valve hardware fails to perform its function, will affect the quality of the gas processed by the gas-liquid treatment system, leading to equipment shutdown.

[0007] In summary, there is an urgent need to design a non-destructive gas-liquid treatment device for the condensate recovery of hydrogen produced by water electrolysis to solve the above problems. Utility Model Content

[0008] The main purpose of this application is to provide a non-destructive gas-liquid treatment device for the recovery of condensate from hydrogen production via water electrolysis, which aims to solve the problems of poor safety, complex structure, and environmental unfriendliness of existing weakly alkaline condensate recovery devices.

[0009] To achieve the above objectives, this application provides a water electrolysis hydrogen production condensate non-destructive gas-liquid treatment device, comprising: an electrolytic cell, an oxygen-liquid separation tank, a hydrogen-liquid separation tank, an oxygen scrubber, a hydrogen scrubber, an oxygen gas cooler, a hydrogen gas cooler, an oxygen secondary gas-liquid separator, and a hydrogen secondary gas-liquid separator. The oxygen-liquid separation tank is connected to the electrolytic cell via a pipeline; the hydrogen-liquid separation tank is connected to the electrolytic cell via a pipeline, and the hydrogen-liquid separation tank is connected to the oxygen-liquid separation tank via a pipeline; the oxygen scrubber is connected to the oxygen-liquid separation tank via a pipeline; and the hydrogen scrubber is connected to the hydrogen-liquid separation tank via a pipeline. Piping connections are provided; the oxygen gas cooler and the oxygen scrubber are connected by a pipeline, and the oxygen gas cooler and the oxygen-liquid separator are connected by a pipeline; the hydrogen gas cooler and the hydrogen scrubber are connected by a pipeline, and the hydrogen gas cooler and the hydrogen-liquid separator are connected by a pipeline; the oxygen secondary gas-liquid separator and the oxygen gas cooler are connected by a pipeline, and the oxygen secondary gas-liquid separator and the oxygen-liquid separator are connected by a pipeline; the hydrogen secondary gas-liquid separator and the hydrogen gas cooler are connected by a pipeline, and the hydrogen secondary gas-liquid separator and the hydrogen-liquid separator are connected by a pipeline.

[0010] Optionally, a first inlet pipe and a first outlet pipe are provided between the oxygen scrubber and the oxygen-liquid separator.

[0011] Optionally, a second inlet pipe and a second outlet pipe are provided between the hydrogen scrubber and the hydrogen-liquid separator.

[0012] Optionally, the pipe between the secondary oxygen gas-liquid separator and the oxygen-liquid separation tank is a reducing pipe.

[0013] Optionally, the outer diameter of the variable-diameter pipe at its minimum point is 8-12 mm, and the wall thickness is 1.5-3 mm.

[0014] Optionally, the pipe between the hydrogen secondary gas-liquid separator and the hydrogen gas-liquid separation tank is a reducing pipe.

[0015] Optionally, the outer diameter of the variable-diameter pipe at its minimum point is 8-12 mm, and the wall thickness is 1.5-3 mm.

[0016] Optionally, the pipeline between the oxygen secondary gas-liquid separator and the oxygen-liquid separation tank is below the liquid level in the oxygen-liquid separation tank.

[0017] Optionally, the pipeline between the secondary hydrogen gas-liquid separator and the hydrogen gas-liquid separation tank is below the liquid level in the hydrogen gas-liquid separation tank.

[0018] Optionally, the oxygen secondary gas-liquid separator is a cyclone separator; the hydrogen secondary gas-liquid separator is a cyclone separator.

[0019] This application discloses a non-destructive gas-liquid treatment device for the recovery of condensate from water electrolysis hydrogen production. During the water electrolysis hydrogen production process, the oxygen produced passes through an oxygen-liquid separator to separate most of the water and alkali. The oxygen then passes through an oxygen scrubber to remove alkali mist. The oxygen scrubber has packing material added to the gas side, and the water scrubber and gas packed tower are combined into a single container to achieve oxygen washing. The washed oxygen then passes through an oxygen gas cooler to remove some moisture. The condensate in the oxygen gas cooler then flows into the oxygen-liquid separator, where the oxygen passes through a secondary oxygen gas-liquid separator to remove trace amounts of water and alkali mist. Similarly, the hydrogen produced during the water electrolysis hydrogen production process passes through a hydrogen-liquid separator to separate most of the water and alkali. The hydrogen then passes through a hydrogen scrubber to remove alkali mist. The hydrogen scrubber adds packing material to the gas side, combining the water scrubber with the gas packed tower to form a container for washing the hydrogen. The washed hydrogen then passes through a hydrogen gas cooler to remove some moisture. The condensate from the hydrogen gas cooler then flows into a hydrogen-liquid separator, where the hydrogen further passes through a secondary hydrogen gas-liquid separator to remove trace amounts of water and alkaline mist. The water electrolysis hydrogen production condensate non-destructive recovery gas-liquid treatment device provided in this application, through optimized pipeline layout, the use of efficient scrubbing and cooling devices, and a two-stage gas-liquid separation device, achieves non-destructive recovery of condensate and efficient gas purification. This device not only solves the problems of poor safety, complex structure, and environmental unfriendliness of existing weakly alkaline condensate recovery devices, but also provides strong technical support for the sustainable development of the hydrogen energy industry. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a water electrolysis hydrogen production condensate non-destructive gas-liquid treatment device provided in an embodiment of this application.

[0021] In the diagram, 1 is an electrolytic cell; 2 is an oxygen-liquid separator; 3 is a hydrogen-liquid separator; 4 is an oxygen scrubber; 5 is a hydrogen scrubber; 6 is an oxygen gas cooler; 7 is a hydrogen gas cooler; 8 is an oxygen secondary gas-liquid separator; 9 is a hydrogen secondary gas-liquid separator; 10 is the first inlet pipe; 11 is the first outlet pipe; 12 is the second inlet pipe; and 13 is the second outlet pipe.

[0022] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0025] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0027] Please see Figure 1This application provides a water electrolysis hydrogen production condensate non-destructive gas-liquid treatment device. This device may include: an electrolyzer 1, an oxygen-liquid separator 2, a hydrogen-liquid separator 3, an oxygen scrubber 4, a hydrogen scrubber 5, an oxygen gas cooler 6, a hydrogen gas cooler 7, an oxygen secondary gas-liquid separator 8, and a hydrogen secondary gas-liquid separator 9. The oxygen-liquid separator 2 is connected to the electrolyzer 1 via a pipeline; the hydrogen-liquid separator 3 is connected to the electrolyzer 1 via a pipeline, and the hydrogen-liquid separator 3 is also connected to the oxygen-liquid separator 2 via a pipeline; the oxygen scrubber 4 is connected to the oxygen-liquid separator 2 via a pipeline. The hydrogen scrubber 5 is connected to the hydrogen-liquid separator 3 via a pipeline; the oxygen gas cooler 6 is connected to the oxygen scrubber 4 via a pipeline, and the oxygen gas cooler 6 is connected to the oxygen-liquid separator 2 via a pipeline; the hydrogen gas cooler 7 is connected to the hydrogen scrubber 5 via a pipeline, and the hydrogen gas cooler 7 is connected to the hydrogen-liquid separator 3 via a pipeline; the oxygen secondary gas-liquid separator 8 is connected to the oxygen gas cooler 6 via a pipeline, and the oxygen secondary gas-liquid separator 8 is connected to the oxygen-liquid separator 2 via a pipeline; the hydrogen secondary gas-liquid separator 9 is connected to the hydrogen gas cooler 7 via a pipeline, and the hydrogen secondary gas-liquid separator 9 is connected to the hydrogen-liquid separator 3 via a pipeline.

[0028] In this embodiment, the oxygen produced during the water electrolysis hydrogen production process passes through an oxygen-liquid separator 2 to separate most of the water and alkali. The oxygen then passes through an oxygen scrubber 4 to remove alkali mist. The oxygen scrubber 4 has packing material added to the gas side, and the water scrubber and gas packing tower are combined into a single container to wash the oxygen. The washed oxygen then passes through an oxygen gas cooler 6 to remove some moisture. The condensate in the oxygen gas cooler 6 then flows into the oxygen-liquid separator 2, where the oxygen then passes through a secondary oxygen gas-liquid separator 8 to remove trace amounts of water and alkali mist. The hydrogen produced during the water electrolysis hydrogen production process passes through a hydrogen-liquid separator 3 to separate most of the water and alkali. The hydrogen then passes through a hydrogen scrubber 5 to remove alkali mist. The hydrogen scrubber 5 adds packing material to the gas side, combining the water scrubber and the gas packed tower into a single container to wash the hydrogen. The washed hydrogen then passes through a hydrogen gas cooler 7 to remove some moisture. The condensate in the hydrogen gas cooler 7 then flows into a hydrogen-liquid separator 3, where the hydrogen further passes through a secondary hydrogen gas-liquid separator 9 to remove trace amounts of water and alkaline mist. The water electrolysis hydrogen production condensate non-destructive recovery gas-liquid treatment device provided in this application, through optimized pipeline layout, the use of efficient scrubbing and cooling devices, and a two-stage gas-liquid separation device, achieves non-destructive recovery of condensate and efficient purification of gas. This device not only solves the problems of poor safety, complex structure, and environmental unfriendliness of existing weakly alkaline condensate recovery devices, but also provides strong technical support for the sustainable development of the hydrogen energy industry.

[0029] Please see Figure 1A first inlet pipe 10 and a first outlet pipe 11 are provided between the oxygen scrubber 4 and the oxygen liquid separator 2.

[0030] In this embodiment, the arrangement of the first inlet pipe 10 and the first outlet pipe 11 makes the gas flow between the oxygen scrubber 4 and the oxygen-liquid separator 2 smoother, and at the same time facilitates the maintenance and cleaning of the oxygen scrubber 4.

[0031] Please see Figure 1 A second inlet pipe 12 and a second outlet pipe 13 are provided between the hydrogen scrubber 5 and the hydrogen-liquid separator 3.

[0032] Similarly, the second inlet pipe 12 and the second outlet pipe 13 serve a similar function to the first inlet pipe 10 and the first outlet pipe 11. They ensure smooth gas flow between the hydrogen scrubber 5 and the hydrogen-liquid separator 3 and facilitate the maintenance and cleaning of the hydrogen scrubber 5.

[0033] Furthermore, the pipe between the secondary oxygen gas-liquid separator 8 and the oxygen-liquid separator 2 is a reducing pipe.

[0034] Specifically, the pipeline between the secondary oxygen gas-liquid separator 8 and the oxygen-liquid separator 2 is set as a reducing pipe, which not only optimizes the pipeline layout and reduces the space occupied by the pipeline, but also improves the efficiency and stability of gas flow.

[0035] Furthermore, the minimum outer diameter of the reducer is 8-12mm, and the wall thickness is 1.5-3mm.

[0036] In this embodiment, the outer diameter of the smallest part of the reducer can be set to 8mm, 9mm, 10mm, 11mm, or 12mm, and the wall thickness can be set to 1.5mm, 2mm, 2.5mm, or 3mm. This design ensures both the strength of the pipe and the smooth flow of gas.

[0037] Furthermore, the pipe between the hydrogen secondary gas-liquid separator 9 and the hydrogen gas-liquid separator 3 is a reducing pipe.

[0038] The pipe between the hydrogen secondary gas-liquid separator 9 and the hydrogen gas-liquid separator 3 is set as a reducing pipe, which not only optimizes the pipe layout and reduces the space occupied by the pipe, but also improves the efficiency and stability of gas flow.

[0039] Furthermore, the minimum outer diameter of the reducer is 8-12mm, and the wall thickness is 1.5-3mm.

[0040] In this embodiment, the outer diameter of the smallest part of the reducer can be set to 8mm, 9mm, 10mm, 11mm, or 12mm, and the wall thickness can be set to 1.5mm, 2mm, 2.5mm, or 3mm. This design ensures both the strength of the pipe and the smooth flow of gas.

[0041] Furthermore, the pipeline between the oxygen secondary gas-liquid separator 8 and the oxygen-liquid separator 2 is below the liquid level in the oxygen-liquid separator 2.

[0042] Specifically, by placing the pipeline between the secondary oxygen gas-liquid separator 8 and the oxygen-liquid separation tank 2 below the liquid level in the oxygen-liquid separation tank 2, gas can be effectively prevented from escaping from the pipeline, thereby improving the airtightness and separation efficiency of the entire device. This design not only ensures high-quality oxygen output but also further enhances the safety and stability of the device.

[0043] Furthermore, the pipeline between the secondary hydrogen gas-liquid separator 9 and the hydrogen gas-liquid separator 3 is below the liquid level in the hydrogen gas-liquid separator 3.

[0044] Similarly, the pipeline between the secondary hydrogen gas-liquid separator 9 and the hydrogen gas-liquid separation tank 3 is also located below the liquid level in the hydrogen gas-liquid separation tank 3. This design also aims to improve the airtightness and separation efficiency of the device, ensuring the purity and high-quality output of hydrogen. By optimizing the pipeline layout and setting reasonable pipeline positions, the water electrolysis hydrogen production condensate non-destructive recovery gas-liquid treatment device provided in this application embodiment achieves non-destructive recovery of condensate and efficient purification of gas, providing strong technical support for the sustainable development of the hydrogen energy industry.

[0045] Furthermore, the oxygen secondary gas-liquid separator 8 is a cyclone separator; the hydrogen secondary gas-liquid separator 9 is a cyclone separator.

[0046] In this embodiment, a cyclone separator is used as the oxygen secondary gas-liquid separator 8 and the hydrogen secondary gas-liquid separator 9, based on its high separation efficiency and stable operating performance. Through its unique internal structure, the cyclone separator can effectively separate liquid water droplets from the gas, thereby achieving further purification of the gas. This design not only improves the separation efficiency of the entire device but also ensures high-quality gas output, meeting the stringent requirements of the hydrogen energy industry for gas purity. Simultaneously, the cyclone separator has a simple structure and is easy to maintain, reducing the overall operating cost of the device. Therefore, this embodiment selects a cyclone separator as the oxygen secondary gas-liquid separator 8 and the hydrogen secondary gas-liquid separator 9, which is one of the important technical means to achieve lossless recovery of condensate and efficient gas purification.

[0047] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A device for non-destructive recovery of condensate from water electrolysis for hydrogen production, characterized in that, include: Electrolytic cell (1); The oxygen-liquid separator (2) is connected to the electrolytic cell (1) via a pipeline; The hydrogen-liquid separator (3) is connected to the electrolytic cell (1) via a pipeline, and the hydrogen-liquid separator (3) is connected to the oxygen-liquid separator (2) via a pipeline; The oxygen scrubber (4) is connected to the oxygen liquid separator (2) via a pipeline; The hydrogen scrubber (5) is connected to the hydrogen gas-liquid separator (3) via a pipeline; The oxygen gas cooler (6) is connected to the oxygen scrubber (4) via a pipe, and the oxygen gas cooler (6) is connected to the oxygen liquid separator (2) via a pipe; The hydrogen gas cooler (7) is connected to the hydrogen scrubber (5) via a pipeline, and the hydrogen gas cooler (7) is connected to the hydrogen-liquid separator (3) via a pipeline. The secondary oxygen gas-liquid separator (8) is connected to the oxygen gas cooler (6) via a pipeline, and the secondary oxygen gas-liquid separator (8) is connected to the oxygen liquid separation tank (2) via a pipeline. The hydrogen secondary gas-liquid separator (9) is connected to the hydrogen gas cooler (7) via a pipeline, and the hydrogen secondary gas-liquid separator (9) is connected to the hydrogen gas-liquid separation tank (3) via a pipeline.

2. The water electrolysis hydrogen production condensate non-destructive recovery gas-liquid treatment device according to claim 1, characterized in that, A first inlet pipe (10) and a first outlet pipe (11) are provided between the oxygen scrubber (4) and the oxygen liquid separator (2).

3. The water electrolysis hydrogen production condensate non-destructive recovery gas-liquid treatment device according to claim 1, characterized in that, A second inlet pipe (12) and a second outlet pipe (13) are provided between the hydrogen scrubber (5) and the hydrogen gas-liquid separator (3).

4. The water electrolysis hydrogen production condensate non-destructive recovery gas-liquid treatment device according to claim 1, characterized in that, The pipe between the oxygen secondary gas-liquid separator (8) and the oxygen-liquid separator (2) is a reducing pipe.

5. The water electrolysis hydrogen production condensate non-destructive recovery gas-liquid treatment device according to claim 4, characterized in that, The minimum outer diameter of the reducer is 8-12mm, and the wall thickness is 1.5-3mm.

6. The water electrolysis hydrogen production condensate non-destructive recovery gas-liquid treatment device according to claim 1, characterized in that, The pipe between the hydrogen secondary gas-liquid separator (9) and the hydrogen gas-liquid separator (3) is a variable diameter pipe.

7. The water electrolysis hydrogen production condensate non-destructive recovery gas-liquid treatment device according to claim 6, characterized in that, The minimum outer diameter of the reducer is 8-12mm, and the wall thickness is 1.5-3mm.

8. The water electrolysis hydrogen production condensate non-destructive recovery gas-liquid treatment device according to claim 1, characterized in that, The pipe between the oxygen secondary gas-liquid separator (8) and the oxygen liquid separator (2) is below the liquid level in the oxygen liquid separator (2).

9. The water electrolysis hydrogen production condensate non-destructive recovery gas-liquid treatment device according to claim 1, characterized in that, The pipe between the hydrogen secondary gas-liquid separator (9) and the hydrogen gas-liquid separator (3) is below the liquid level in the hydrogen gas-liquid separator (3).

10. The water electrolysis hydrogen production condensate non-destructive recovery gas-liquid treatment device according to claim 1, characterized in that, The oxygen secondary gas-liquid separator (8) is a cyclone separator; The hydrogen secondary gas-liquid separator (9) is a cyclone separator.

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