Automatic drainage device for tail gas of fuel cell
By adopting an inverted U-shaped pipeline structure in the automatic exhaust drainage device of fuel cell, automatic drainage is achieved, and the safety and reliability problems caused by improper drainage in the prior art are solved, and the safety and reliability of the system are improved.
Patent Information
- Application Number
- CN202421914166.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-08
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-08-08
AI Technical Summary
The drainage methods of existing fuel cell power generation systems pose risks of excessive drainage and solenoid valve failure, resulting in system safety and reliability problems.
A fuel cell exhaust automatic drainage device is designed, and an inverted U-shaped pipeline structure is adopted. When the water storage height exceeds the highest point of the inverted U-shaped pipeline, the water is automatically discharged to ensure that a certain amount of water storage is always present in the vertical main pipe, and the use of solenoid valves is avoided through the inverted U-shaped pipeline structure.
It effectively avoids excessive drainage or non-drainage problems caused by solenoid valve failure, improves the safety and reliability of the system, and prevents hydrogen leakage.
Smart Images
Figure CN222995436U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of fuel cells, in particular to an automatic drainage device for the tail gas of a fuel cell. Background Art
[0002] For the drainage method of a high-power fixed fuel cell power generation system, at present, most of them directly connect a vertical drain pipe to the hydrogen or mixed gas main pipe, and an electromagnetic switch valve is adopted to realize the drainage of the hydrogen system. Specifically, an electromagnetic switch valve is installed at the low position of the vertical drain pipe. The hydrogen or mixed gas main pipe realizes gas-water separation through the vertical drain pipe, and drains water regularly at a certain power point. The existing method has the risk of excessive drainage and solenoid valve failure, resulting in problems with the safety and reliability of the system. Content of the Utility Model
[0003] The purpose of the utility model is to overcome the shortcomings of the prior art and provide an automatic drainage device for the tail gas of a fuel cell.
[0004] The purpose of the utility model is realized through the following technical solutions: an automatic drainage device for the tail gas of a fuel cell, comprising a vertical main pipe, an intake pipe and a liquid drainage structure; the bottom of the vertical main pipe is closed; the intake pipe is communicated with the side part of the vertical main pipe, and the inlet main pipe is used for intake; the liquid drainage structure comprises an inverted U-shaped pipe, one end of the bottom of the inverted U-shaped pipe is communicated with the bottom of the vertical main pipe through a pipeline, and the other end of the bottom of the inverted U-shaped pipe is used for liquid drainage;
[0005] The height at the highest point of the inverted U-shaped pipe is lower than the height at the connection of the intake pipe and the vertical main pipe, and the height at the highest point of the inverted U-shaped pipe is higher than the height at the bottom end of the vertical main pipe.
[0006] By setting the inverted U-shaped pipe in the utility model, when the water storage height in the end of the inverted U-shaped pipe communicated with the vertical main pipe is lower than the height at the highest point of the inverted U-shaped pipe, the water accumulates in the vertical main pipe and plays a role of liquid seal for the hydrogen in the vertical main pipe. When the water storage height in the end of the inverted U-shaped pipe communicated with the vertical main pipe exceeds the height at the highest point of the inverted U-shaped pipe, it will be automatically discharged from one end of the inverted U-shaped pipe. The utility model can ensure that there is always a certain amount of water stored in the vertical main pipe, and no electromagnetic valve is set to avoid the failure of the electromagnetic valve resulting in excessive drainage or non-drainage, and further avoid hydrogen leakage.
[0007] In some embodiments, the liquid drainage structure further comprises a manual liquid drainage pipe, both ends of the manual liquid drainage pipe are respectively communicated with both ends of the bottom of the inverted U-shaped pipe, and a manual valve is arranged on the manual liquid drainage pipe. By setting the manual liquid drainage pipe, the water in the vertical main pipe can be completely discharged by manually opening the manual valve. In addition, the manual liquid drainage pipe can also play a role in discharging slag.
[0008] In some embodiments, the bottom of the vertical main pipe is conical, and the inverted U-shaped pipe is connected to the lowest point of the conical bottom of the vertical main pipe through a pipeline. Setting the bottom of the vertical main pipe to be conical can completely drain the water in the vertical main pipe and avoid water accumulation.
[0009] In some embodiments, a high liquid level monitoring device for monitoring an excessive liquid level is provided on the side of the vertical main pipe. When the high liquid level monitoring device monitors an excessive liquid level, it gives a reminder to avoid excessive water accumulation and backflow into the intake pipe due to blockage of the liquid drainage structure, which may cause safety risks.
[0010] In some embodiments, the height of the high liquid level monitoring device is lower than the height of the connection between the intake pipe and the vertical main pipe and higher than the height of the highest point of the inverted U-shaped pipe. The high liquid level monitoring device is higher than the highest point of the inverted U-shaped pipe, enabling the liquid drainage structure to drain water normally. At the same time, the high liquid level monitoring device is lower than the height of the intake pipe, and it can give a timely reminder before the water storage height in the vertical main pipe reaches the height of the intake pipe.
[0011] In some embodiments, a low liquid level monitoring device for monitoring a too low liquid level is provided on the side of the vertical main pipe. The low liquid level monitoring device monitors a too low liquid level and gives a reminder when the liquid level is too low.
[0012] In some embodiments, the height of the low liquid level monitoring device is lower than the height of the highest point of the inverted U-shaped pipe. The height of the low liquid level monitoring device is lower than the height of the inverted U-shaped pipe, which facilitates the normal drainage of the liquid drainage structure.
[0013] In some embodiments, it further includes a liquid adding pipe, which is connected to the side of the vertical main pipe, and the liquid adding pipe is used to add liquid into the vertical main pipe. When there is no water in the vertical main pipe previously, water can be added into the vertical main pipe through the liquid adding pipe.
[0014] In some embodiments, the liquid adding pipe is in an L shape. The end of the horizontal section of the liquid adding pipe is connected to the vertical main pipe. A sealing cover is provided at the top of the vertical section of the liquid adding pipe. The height of the top end of the vertical section of the liquid adding pipe is lower than the height of the highest point of the inverted U-shaped pipe and higher than the height of the low liquid level monitoring device. The L-shaped liquid adding pipe facilitates water addition.
[0015] The utility model has the following advantages:
[0016] The utility model is provided with an inverted U-shaped pipe. When the water level height in the end of the inverted U-shaped pipe communicating with the vertical main pipe is higher than the height of the highest point of the inverted U-shaped pipe, the water will automatically drain out from the inverted U-shaped pipe, and the water level in the vertical main pipe is always maintained within a certain height range, avoiding the use of a solenoid valve to control drainage, thereby avoiding the problem of solenoid valve failure, preventing excessive drainage, and avoiding hydrogen leakage. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 is a schematic structural diagram of the automatic drainage device for the fuel cell tail gas of the utility model;
[0018] In the figure: 1, vertical main pipe; 2, intake pipe; 3, inverted U-shaped pipe; 4, manual drain pipe; 41, manual valve; 5, high liquid level monitoring device; 6, low liquid level monitoring device; 7, liquid adding pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0019] In order to make the objectives, technical solutions and advantages of the utility model clearer, the following further describes the utility model in detail with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model, that is, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings herein can be arranged and designed in various different configurations.
[0020] The following further describes the utility model with reference to the drawings, but the protection scope of the utility model is not limited to the following description.
[0021] As Figure 1 shown, an automatic drainage device for fuel cell tail gas includes a vertical main pipe 1, an intake pipe 2 and a drainage structure; the bottom of the vertical main pipe 1 is closed; the intake pipe 2 communicates with the side of the vertical main pipe 1, and the inlet main pipe is used for intake; the drainage structure includes an inverted U-shaped pipe 3, one end of the bottom of the inverted U-shaped pipe 3 is communicated with the bottom of the vertical main pipe 1 through a pipeline, and the other end of the bottom of the inverted U-shaped pipe 3 is used for drainage;
[0022] The height of the highest point of the inverted U-shaped pipe 3 is lower than the height of the connection between the intake pipe 2 and the vertical main pipe 1, and the height of the highest point of the inverted U-shaped pipe 3 is higher than the height of the bottom end of the vertical main pipe 1.
[0023] Specifically, in this embodiment, the two ends of the bottom of the inverted U-shaped pipe 3 are at the same horizontal height. One end of the bottom of the inverted U-shaped pipe 3 is communicated with the bottom of the vertical main pipe 1 through a horizontal pipeline, and the other end of the bottom of the inverted U-shaped pipe 3 is connected with a horizontal pipeline for drainage.
[0024] During the working process of this embodiment, hydrogen or a mixed gas enters the vertical main pipe 1 through the intake pipe 2 and realizes water-gas separation. The gas is discharged from the top of the vertical main pipe 1, while water accumulates at the bottom of the vertical main pipe 1. When the water level in the end of the inverted U-shaped pipe 3 connected to the vertical main pipe 1 is lower than the highest point of the inverted U-shaped pipe 3, the water continues to accumulate. When the water level reaches the height of the highest point of the inverted U-shaped pipe 3, the excess water will be automatically discharged from the other end of the inverted U-shaped pipe 3. No solenoid valve is provided on the entire drainage device, solving the problem of over-drainage or system shutdown caused by non-drainage due to solenoid valve failure, thereby avoiding hydrogen leakage and improving the safety and reliability of the system.
[0025] Preferably, the liquid discharge structure further includes a manual liquid discharge pipe 4. Both ends of the manual liquid discharge pipe 4 are respectively connected to both ends of the bottom of the inverted U-shaped pipe 3, and a manual valve 41 is provided on the manual liquid discharge pipe 4. In this embodiment, both ends of the manual liquid discharge pipe 4 are connected to both ends of the bottom of the inverted U-shaped pipe 3 through a tee joint. When the fuel system needs to be maintained, the water in the vertical main pipe 1 needs to be emptied. By providing the manual liquid discharge pipe 4 at both ends of the bottom of the inverted U-shaped pipe 3 and the manual valve 41 on the manual liquid discharge pipe 4, opening the manual valve 41 can connect both ends of the bottom of the inverted U-shaped pipe 3, and the water in the vertical main pipe 1 can be drained completely. At the same time, the manual liquid discharge pipe 4 can also play a role in discharging slag from the vertical main pipe 1.
[0026] Preferably, the bottom of the vertical main pipe 1 is conical, and the inverted U-shaped pipe 3 is connected to the lowest point of the conical bottom of the vertical main pipe 1 through a pipeline. In some other embodiments, the bottom of the vertical main pipe 1 can also be of other shapes, but the inverted U-shaped pipe 3 is always connected to the bottommost part of the vertical main pipe 1. The conical bottom of the vertical main pipe 1 can ensure that the water in the vertical main pipe 1 is drained completely during fuel cell maintenance, avoiding water accumulation.
[0027] Preferably, a high liquid level monitoring device 5 for monitoring excessive liquid level is provided on the side of the vertical main pipe 1. The high liquid level monitoring device 5 in this embodiment is a liquid level sensor. Through the high liquid level monitoring device 5, excessive liquid level can be monitored to avoid system shutdown caused by excessive liquid level.
[0028] Preferably, the height of the high liquid level monitoring device 5 is lower than the height of the connection between the intake pipe 2 and the vertical main pipe 1 and higher than the highest point of the inverted U-shaped pipe 3. Setting the height of the high liquid level monitoring device 5 lower than the height of the intake pipe 2 can issue an alarm before the water flows back into the intake pipe 2 and enters the fuel cell power generation system, improving safety; at the same time, setting the height of the high liquid level monitoring device 5 lower than the highest point of the inverted U-shaped pipe 3 ensures that the inverted U-shaped pipe 3 does not issue an alarm during normal drainage.
[0029] Preferably, a low liquid level monitoring device 6 for monitoring too low liquid level is provided on the side of the vertical main pipe 1. The low liquid level monitoring device 6 is a liquid level sensor. By providing the low liquid level monitoring device 6, excessive drainage can be avoided to cause the water level in the vertical main pipe 1 to be too low.
[0030] Preferably, the height of the low liquid level monitoring device 6 is lower than the height of the highest point of the inverted U-shaped pipe 3. The height of the low liquid level monitoring device 6 is lower than the height of the highest point of the inverted U-shaped pipe 3, so that an alarm will be issued only when the water level in the vertical main pipe 1 drops below the height of the highest point of the inverted U-shaped pipe 3, so that the inverted U-shaped pipe 3 can be drained normally.
[0031] Preferably, a liquid adding pipeline 7 is further included, the liquid adding pipeline 7 is connected to the side of the vertical main pipe 1, and the liquid adding pipeline 7 is used to add liquid into the vertical main pipe 1. The liquid adding pipeline 7 is provided to add water into the vertical main pipe 1 after the fuel cell maintenance or when the system is used for the first time, so as to avoid hydrogen leakage when there is no water in the vertical main pipe 1 at the initial operation of the fuel cell.
[0032] Preferably, the liquid adding pipe 7 is L-shaped, the end of the horizontal section of the liquid adding pipe 7 is connected to the vertical main pipe 1, and a plugging cap is provided at the top of the vertical section of the liquid adding pipe 7. The height of the top of the vertical section of the liquid adding pipe 7 is lower than the height of the highest point of the inverted U-shaped pipe 3 and higher than the height of the low liquid level monitoring device 6. In some other embodiments, the liquid adding pipe 7 can also be other shapes. The liquid adding pipe 7 is L-shaped to facilitate pouring water into the vertical main pipe 1. One end of the liquid adding pipe 7 is vertically arranged and the other end is horizontally arranged. The whole is L-shaped. The top height of the vertical section of the liquid adding pipe 7 is lower than the height of the highest point of the inverted U-shaped pipe 3. Avoid adding too much water when adding water. The top height of the vertical section of the liquid adding pipe 7 is higher than the height of the low liquid level monitoring device 6 to avoid adding too little water and causing an alarm of the low liquid level monitoring device 6.
[0033] When adding water, pour water into the liquid adding pipe 7 until the water overflows from the top of the vertical section of the liquid adding pipe 7. At this time, the liquid adding is completed, and the liquid adding pipe 7 is blocked with a blocking cap.
[0034] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Any technician familiar with the field can make many possible changes and modifications to the technical solution of the utility model by using the above-mentioned technical content without departing from the scope of the technical solution of the utility model, or modify it into an equivalent embodiment of equivalent changes. Therefore, any changes, modifications, equivalent changes and modifications made to the above embodiments based on the technology of the utility model without departing from the content of the technical solution of the utility model shall fall within the protection scope of the technical solution of the utility model.
Claims
1. A fuel cell exhaust gas automatic drainage device, characterized in that: include: A vertical main pipe (1), the bottom of the vertical main pipe (1) is closed; An air intake pipe (2), the air intake pipe (2) being in communication with a side portion of the vertical manifold (1), the air intake pipe (2) being used for air intake; A liquid drainage structure, the liquid drainage structure comprising an inverted U-shaped pipe (3), one end of the bottom of the inverted U-shaped pipe (3) being connected to the bottom of the vertical main pipe (1) through a pipeline, and the other end of the bottom of the inverted U-shaped pipe (3) being used for liquid drainage; The height of the highest point of the inverted U-shaped pipe (3) is lower than the height of the connection point between the air intake pipe (2) and the vertical main pipe (1), and the height of the highest point of the inverted U-shaped pipe (3) is higher than the height of the bottom end of the vertical main pipe (1).
2. The automatic exhaust gas drainage device for a fuel cell according to claim 1, characterized in that: The drainage structure further comprises a manual drainage pipe (4), the two ends of which are respectively connected to the two ends of the bottom of the inverted U-shaped pipe (3), and a manual valve (41) is provided on the manual drainage pipe (4).
3. The automatic exhaust drainage device for fuel cell according to claim 1, characterized in that: The bottom of the vertical main pipe (1) is conical, and the inverted U-shaped pipe (3) is connected to the lowest point of the conical bottom of the vertical main pipe (1) through a pipeline.
4. The automatic exhaust gas drainage device for a fuel cell according to claim 1, characterized in that: A high liquid level monitoring device (5) for monitoring excessively high liquid levels is arranged on the side of the vertical main pipe (1).
5. The automatic exhaust gas drainage device for a fuel cell according to claim 4, characterized in that: The height of the high liquid level monitoring device (5) is lower than the height of the connection point between the air intake pipe (2) and the vertical main pipe (1) and higher than the height of the highest point of the inverted U-shaped pipe (3).
6. The automatic exhaust gas drainage device for a fuel cell according to claim 1, characterized in that: A low liquid level monitoring device (6) for monitoring excessively low liquid levels is arranged on the side of the vertical main pipe (1).
7. The automatic drainage device for fuel cell tail gas according to claim 6, characterized in that: The height of the low liquid level monitoring device (6) is lower than the height of the highest point of the inverted U-shaped pipe (3).
8. The automatic exhaust gas drainage device for a fuel cell according to claim 6, characterized in that: It also comprises a liquid adding pipeline (7), wherein the liquid adding pipeline (7) is connected to the side of the vertical main pipe (1), and the liquid adding pipeline (7) is used to add liquid into the vertical main pipe (1).
9. The automatic drainage device for fuel cell tail gas according to claim 8, characterized in that: The liquid adding pipeline (7) is L-shaped, the end of the horizontal section of the liquid adding pipeline (7) is connected to the vertical main pipe (1), the top of the vertical section of the liquid adding pipeline (7) is provided with a blocking cover, and the height of the top of the vertical section of the liquid adding pipeline (7) is lower than the height of the highest point of the inverted U-shaped pipeline (3) and higher than the height of the low liquid level monitoring device (6).