Liquid seal drainage recovery device based on PEM water electrolysis hydrogen production system
By setting up liquid sealing components and outer wall heat exchanger in the PEM electrolytic water hydrogen production system, the problems of drainage backflow and temperature increase are solved, safe and efficient drainage recovery is achieved, and water resource utilization and system stability are improved.
Patent Information
- Application Number
- CN202422426094.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-09
- Publication Date
- 2025-08-19
- Estimated Expiration
- 2034-10-09
AI Technical Summary
In the PEM electrolytic hydrogen production system, the drainage temperature is high, which causes the water tank temperature to rise, affecting the normal operation of the electrolytic tank, and the drainage may flow back into the gas-liquid separator, affecting the normal purification of the system; at the same time, there is a safety hazard for hydrogen and oxygen mixing.
A liquid sealing component is provided between the drainage water tank and the water tank, and a heat exchanger is installed on its outer wall to form a liquid seal to isolate the hydrogen and oxygen mixing. The drainage temperature is reduced through the heat exchanger to ensure that the electrolytic temperature is within the optimal range.
It realizes safe recycling and utilization of drainage, prevents hydrogen and oxygen mixing, reduces drainage temperature, ensures the stable electrolytic water temperature in the system, improves water resource utilization, and reduces operating costs.
Smart Images
Figure CN223240175U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of water electrolysis hydrogen production, and specifically relates to a liquid seal drainage recovery device based on a PEM water electrolysis hydrogen production system. Background Art
[0002] The production of hydrogen and oxygen by electrolysis of water is a relatively mature process. Its main components include: electrolytic cell, gas-water separation and alkali adding tank, washing tank, dehydration tank, buffer tank, cooling water tank, etc.
[0003] In the PEM water electrolysis hydrogen production system, each electrolyzer has different processes and raw materials, and its performance is also different, but no matter which type of cell is used, water needs to be discharged. Through test data, it is known that the purity of the discharged water can be directly used in fuel cells.
[0004] Based on this background, we want to recycle the system drainage, which can not only improve the utilization rate of water resources, but also reduce the system operation cost;
[0005] Considering that the drainage backflows back to the gas-liquid separator during the process of returning to the water tank, the gas-liquid separator cannot drain water normally, affecting the normal purification work of the system. Another point is that the drainage in the system is mainly generated by the gas-liquid separator, and the drainage temperature is relatively high. The drainage is recycled to the water tank, which may cause the water temperature of the water tank to rise, affecting the normal electrolysis of the electrolytic cell;
[0006] Therefore, a device is set up before the drainage returns to the water tank to isolate the oxygen in the water tank from entering the system, preventing the problem of hydrogen and oxygen mutual transmission. It can also effectively solve the phenomenon of drainage backflow in the process of returning to the water tank, and can cool the drainage in time to reduce the impact of the return water temperature on the downstream water temperature in the water tank, ensuring that the temperature of the electrolyzed water in the system remains within the optimal electrolysis temperature range of the electrolytic cell.
[0007] In view of this, the utility model provides a liquid-sealed drainage recovery device based on a PEM water electrolysis hydrogen production system, so as to achieve safe recycling of drainage during the water electrolysis hydrogen production process and improve the efficiency of water resource utilization. Utility Model Content
[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a liquid seal drainage recovery device based on a PEM water electrolysis hydrogen production system, comprising: a liquid seal component connected between a drainage buffer tank and a water tank in the PEM water electrolysis hydrogen production system, wherein the liquid seal component is used to temporarily store part of the drainage in the PEM water electrolysis hydrogen production system to form a liquid seal therein.
[0009] As a preferred embodiment of the liquid seal drainage recovery device of the PEM water electrolysis hydrogen production system of the present invention, the open end of the liquid seal component is connected to a check valve.
[0010] As a preferred liquid seal drainage recovery device of the present invention based on the PEM water electrolysis hydrogen production system, the liquid seal component is a "U"-shaped pipe, and the check valves are respectively connected to both ends of the "U" pipe.
[0011] As a preferred embodiment of the liquid seal drainage recovery device based on the PEM water electrolysis hydrogen production system of the present invention, the check valve is respectively connected with a connecting pipe 1 and a connecting pipe 2 for connecting the drainage buffer tank and the water tank.
[0012] As a preferred embodiment of the liquid seal drainage recovery device based on the PEM water electrolysis hydrogen production system of the present invention, a heat exchanger is fitted on the outer wall of the liquid seal component for heat exchange with the drainage in the liquid seal component.
[0013] As a preferred embodiment of the liquid seal drainage recovery device of the PEM water electrolysis hydrogen production system of the present invention, the heat exchanger is a shell and tube heat exchanger.
[0014] As a preferred embodiment of the liquid seal drainage recovery device of the PEM water electrolysis hydrogen production system of the present invention, the heat exchanger is spirally wound on the outer wall of the liquid seal component.
[0015] As a preferred embodiment of the liquid seal drainage recovery device of the PEM water electrolysis hydrogen production system of the present invention, the heat exchanger is made of copper or carbon steel.
[0016] Compared with the prior art, the beneficial effects of the present invention are:
[0017] 1. In the PEM electrolysis water hydrogen production system, the utility model sets a liquid seal component between the drainage buffer tank and the water tank to achieve isolation between the drainage and the water tank, prevent hydrogen and oxygen from mixing, and improve the safe recycling of drainage;
[0018] 2. Secondly, the heat exchanger installed on the outer wall of the liquid seal component can effectively reduce the temperature of the drainage and reduce the impact of drainage recovery on the temperature of the water tank in the system, so as to ensure that the temperature of the electrolyzed water in the system is maintained within the optimal electrolysis temperature range of the electrolytic cell. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:
[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;
[0021] Figure 2 This is a schematic diagram of the explosion structure of the utility model;
[0022] Figure 3This is a schematic diagram of the planar structure of the utility model;
[0023] Figure 4 It is a schematic diagram of the principle of the present utility model.
[0024] In the figure: 1. Liquid seal component; 2. Check valve; 3. Heat exchanger; 4. Connecting pipe 1; 5. Connecting pipe 2. DETAILED DESCRIPTION
[0025] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0026] The utility model relates to a liquid seal drainage recovery device based on a PEM electrolysis water hydrogen production system, such as Figure 1-Figure 3 As shown, it includes a liquid seal component 1, a "U"-shaped pipe, connected between the drainage buffer tank and the water tank in the PEM water electrolysis hydrogen production system. Check valves 2 are installed at the two open ends of the top of the liquid seal component 1 to prevent the backflow of drainage through the liquid seal component 1. Connecting pipe 1 4 and connecting pipe 2 5 are respectively installed on the two check valves 2 connected to the top of the liquid seal component 1. Connecting pipe 1 4 and connecting pipe 2 5 are used to connect the drain outlet of the drainage buffer tank and the water inlet of the water tank in the PEM water electrolysis hydrogen production system, forming a loop in the entire system.
[0027] Furthermore, a heat exchanger 3 made of copper or carbon steel is fitted on the outer wall of the liquid sealing component 1. In this embodiment, the heat exchanger 3 is preferably a shell-and-tube heat exchanger made of copper, which is spirally wound on the outer wall of the liquid sealing component 1 to increase the contact area with the outer wall of the liquid sealing component 1 and improve the heat exchange effect.
[0028] When using, Figure 4 As shown, the drainage discharged from the PEM water electrolysis hydrogen production system will first enter the drainage buffer tank to regulate and stabilize the drainage water flow. The drainage in the drainage buffer tank will pass through the connecting pipe 1 4 connected to its drainage port, and then flow into the "U"-shaped liquid seal component 1 through a check valve 2, and then flow into the water tank of the system through another check valve 2 and the connecting pipe 2 5. Since the liquid seal component 1 is "U"-shaped, the drainage flowing into the liquid seal component 1 will be temporarily stored in the liquid seal component 1 to form a liquid seal, thereby preventing hydrogen leakage and improving safety.
[0029] The heat exchanger 3 with a spirally wound outer wall of the liquid sealing component 1 will be fed with cooling water, which will exchange heat with the relatively high temperature drainage flowing into the liquid sealing component 1, thereby taking away the heat of the drainage to achieve the cooling of the drainage. This can reduce the impact of the return water temperature on the downstream water temperature in the water tank, and ensure that the temperature of the electrolyzed water in the system is maintained within the optimal electrolysis temperature range of the electrolytic cell.
[0030] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.
Claims
1. A liquid seal drainage recovery device based on a PEM electrolysis water hydrogen production system, characterized in that: include: A liquid seal component (1) connected between a drainage buffer tank and a water tank in a PEM water electrolysis hydrogen production system, wherein the liquid seal component (1) is used to temporarily store part of the drainage in the PEM water electrolysis hydrogen production system to form a liquid seal therein; The open end of the liquid sealing component (1) is connected to a check valve (2). The liquid sealing component (1) is a "U"-shaped pipe. The check valves (2) are respectively connected to both ends of the "U" pipe. The check valve (2) is respectively connected to a connecting pipe 1 (4) and a connecting pipe 2 (5) for connecting the drainage buffer tank and the water tank.
2. The liquid seal drainage recovery device based on the PEM water electrolysis hydrogen production system according to claim 1, characterized in that: The outer wall of the liquid sealing component (1) is fitted with a heat exchanger (3) for performing heat exchange with drainage in the liquid sealing component (1).
3. The liquid seal drainage recovery device based on the PEM electrolysis water hydrogen production system according to claim 2, characterized in that: The heat exchanger (3) is a shell-and-tube heat exchanger.
4. The liquid seal drainage recovery device based on the PEM electrolysis water hydrogen production system according to claim 3, characterized in that: The heat exchanger (3) is spirally wound on the outer wall of the liquid sealing component (1).
5. The liquid seal drainage recovery device based on the PEM water electrolysis hydrogen production system according to claim 4, characterized in that: The heat exchanger (3) is made of copper or carbon steel.