Hydrogen pipeline gas inlet device for improving single low of blind end of laminated double-reactor system

Abstract

The utility model belongs to the field of fuel cell stacks, and particularly relates to a hydrogen pipeline gas inlet device for improving single low of a blind end of a laminated double-stack system. The device comprises a steam-water separator, a drain valve, an electric pile and an ejector module, the ejector module comprises a particle filter, a hydrogen inlet valve, a proportional valve and double ejectors; the particle filter is connected with the hydrogen inlet valve, the hydrogen inlet valve is divided into two paths of outlets which are respectively connected with the proportional valves, the proportional valves are respectively connected with two inlets of the double ejectors, and the outlets of the double ejectors are converged into one path to be connected with the electric pile; a hydrogen return port of the double ejector is connected with a hydrogen outlet of the steam-water separator, and a hydrogen outlet of the double ejector is connected with a hydrogen inlet of the steam-water separator. The laminated double-reactor hydrogen inlet pipeline avoids direct vertical reactor inlet, and water in backflow hydrogen is uniformly distributed and enters the upper reactor and the lower reactor, so that the problem of single and low blind ends of the lower reactor is solved.

Description

Technical Field

[0001] This utility model belongs to the field of fuel cell stacks, specifically relating to a hydrogen pipeline inlet device for improving the single low-temperature blind end of a stacked dual-stack system. Background Technology

[0002] A stacked dual-stacking hydrogen fuel cell system is a device that directly converts hydrogen and oxygen into electrical energy through an electrochemical reaction. Currently, the basic principle of the hydrogen subsystem in a stacked dual-stacking hydrogen fuel cell system is as follows: Hydrogen (dry hydrogen) enters the ejector module from the outside, passes through the ejector module, and enters the dual-stacking stack through the dual-stacking hydrogen inlet pipe. Inside the stack, the hydrogen undergoes a reaction; unreacted hydrogen becomes more humid and contains moisture, exiting from the stack's hydrogen outlet and being recirculated back through the ejector. It then passes through the dual-stacking hydrogen outlet pipe, where the moist hydrogen mixes with the dry hydrogen inside the ejector, and re-enters the upper and lower stacks through the dual-stacking hydrogen inlet pipe. Because the existing dual-stacking hydrogen inlet pipe enters the lower stack vertically, most of the moisture, under the influence of gravity, flows into the lower stack along the inlet pipe, with only a small portion being carried into the upper stack. This results in excessive moisture in the lower stack, causing blind-end blockage and low voltage. Utility Model Content

[0003] This invention provides a hydrogen inlet device for improving the single low pressure at the blind end of a stacked dual-reactor system. The hydrogen inlet pipe of this invention avoids direct vertical entry into the reactor, allowing the moisture in the returning hydrogen to be evenly distributed into both the upper and lower reactors, thereby solving the problem of a single low pressure at the blind end of the lower reactor.

[0004] The technical solution of this utility model is as follows.

[0005] A stacked dual-reactor system for improving the hydrogen pipeline inlet device in blind-end single-low pressure includes a gas-water separator, a drain valve, a fuel cell stack, and an ejector module. The ejector module includes a particulate filter, a hydrogen inlet valve, a proportional valve, and dual ejectors. The particulate filter is connected to the hydrogen inlet valve, which has two outlets, each connected to a proportional valve. The proportional valves are connected to the two inlets of the dual ejectors, and the outlets of the dual ejectors converge into one outlet connected to the fuel cell stack. The hydrogen return port of the dual ejectors is connected to the hydrogen outlet of the gas-water separator, and the hydrogen outlet of the fuel cell stack is connected to the hydrogen inlet of the gas-water separator.

[0006] More preferably, the ejector module further includes a safety valve, which is disposed on the pipe between the dual ejectors and the fuel cell stack.

[0007] More preferably, the fuel cell stack is composed of a first fuel cell stack and a second fuel cell stack stacked one on top of the other.

[0008] More preferably, the ejector module is connected to the first and second fuel cell stacks via a dual-stack hydrogen inlet pipe.

[0009] More preferably, the hydrogen inlet pipe of the dual-stacking system is connected to the center of the first horizontal pipe via a branch point. One end of the first horizontal pipe is connected to the first fuel cell stack, and the other end is connected to a vertical pipe and then to a second horizontal pipe, which is connected to the second fuel cell stack. The hydrogen inlet pipe of the dual-stacking system does not directly enter the lower stack vertically, but is made into a three-way structure. After the hydrogen enters the hydrogen inlet pipe of the dual-stacking system, it flows straight in, impacts the horizontal pipe, and flows out evenly to the left and right. Because the existing hydrogen inlet pipe of the stacked dual-stacking system directly enters the lower stack, it is easy for the moisture in the returning hydrogen to enter the lower stack directly due to gravity, resulting in water accumulation at the blind end of the lower stack, causing low voltage at the blind end and affecting system performance. Therefore, the hydrogen inlet pipe of the stacked dual-stacking system of this invention avoids direct vertical entry into the stack, allowing the moisture in the returning hydrogen to be evenly distributed into the upper and lower stacks, thereby solving the problem of low voltage at the blind end of the lower stack.

[0010] More preferably, a drain valve is connected to the drain outlet of the steam-water separator.

[0011] More preferably, a hydrogen sensor is installed on the connecting pipe between the hydrogen inlet valve and the proportional valve.

[0012] More preferably, a first pressure sensor is provided on the pipe between the dual ejectors and the fuel cell stack.

[0013] More preferably, a second pressure sensor is installed on the pipe between the steam-water separator and the fuel cell stack.

[0014] Compared with the prior art, the advantages of this utility model are:

[0015] This utility model's stacked dual-stacking hydrogen inlet pipe avoids direct vertical inlet, allowing the moisture in the reflux hydrogen to be evenly distributed into the upper and lower stacks, thereby solving the problem of blind-end blockage and low pressure caused by excessive moisture entering the lower stack. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the PID controller for the hydrogen subsystem.

[0017] Figure 2 This is a schematic diagram of the hydrogen subsystem;

[0018] Figure 3 It is a three-way structure dual-stacking hydrogen inlet pipe.

[0019] The components shown in the diagram are as follows: 1. Particle filter; 2. Hydrogen inlet valve; 3. Proportional valve; 4. Dual ejectors; 5. Safety valve; 6. Gas-water separator; 7. Drain valve; 8. Fuel cell stack; 8.1 First fuel cell stack; 8.2 Second fuel cell stack; 9.1 Hydrogen sensor; 9.2 First pressure sensor; 9.3 Second pressure sensor; 10. Ejector module; 11. Diversion point; 12. Dual-stack hydrogen inlet pipe; 12.1 First horizontal pipe; 12.2 Vertical pipe; 12.3 Second horizontal pipe. Detailed Implementation

[0020] The technical solutions described below, in conjunction with specific illustrations, are presented to provide a full understanding of this utility model application. However, this application can be implemented in many other ways different from those described herein, and similar extended embodiments made by those skilled in the art without inventive effort are all within the scope of protection of this utility model.

[0021] like Figure 1 As shown, this embodiment of a stacked dual-reactor system provides a hydrogen pipeline inlet device to improve the single-low hydrogen flow rate at the blind end. The device includes a vapor-water separator 6, a drain valve 7, a fuel cell stack 8, and an ejector module 10. The ejector module 10 includes a particulate filter 1, a hydrogen inlet valve 2, a proportional valve 3, and dual ejectors 4. The particulate filter 1 is connected to the hydrogen inlet valve 2, which has two outlets connected to the proportional valve 3. The proportional valve 3 is connected to the two inlets of the dual ejectors 4, and the outlets of the dual ejectors 4 converge into one outlet connected to the fuel cell stack 8. In this embodiment, a safety valve 5 is installed on the pipeline between the dual ejectors 4 and the fuel cell stack 8. The hydrogen return port of the dual ejectors 4 is connected to the hydrogen outlet of the vapor-water separator 6, and the hydrogen outlet of the fuel cell stack 8 is connected to the hydrogen inlet of the vapor-water separator 6. A drain valve 7 is connected to the drain outlet of the vapor-water separator 6. This embodiment includes a hydrogen sensor 9.1, a first pressure sensor 9.2, and a second pressure sensor 9.3. The hydrogen sensor 9.1 is installed on the connecting pipe between the hydrogen inlet valve 2 and the proportional valve 3; the first pressure sensor 9.2 is installed on the pipe between the dual ejector 4 and the fuel cell stack 8; and the second pressure sensor 9.3 is installed on the pipe between the gas-water separator 6 and the fuel cell stack 8.

[0022] like Figure 2 As shown, the fuel cell stack 8 is composed of a first fuel cell stack 8.1 and a second fuel cell stack 8.2 stacked vertically. The ejector module 10 is connected to the first fuel cell stack 8.1 and the second fuel cell stack 8.2 through a dual-stack hydrogen inlet pipe.

[0023] like Figure 2 and Figure 3As shown, the hydrogen inlet pipe 12 of the dual stack is connected to the center of the first horizontal pipe 12.1 through the diversion point 11. One end of the first horizontal pipe 12.1 is connected to the first fuel cell stack 8.1, and the other end is connected to the vertical pipe 12.2 and then to the second horizontal pipe 12.3. The second horizontal pipe 12.3 is connected to the second fuel cell stack 8.2. The hydrogen inlet pipe of the dual stack does not directly enter the lower stack vertically, but is made into a three-way structure. After the hydrogen enters the hydrogen inlet pipe of the dual stack, it rushes straight, hits the horizontal pipe, and flows out evenly to the left and right.

[0024] as follows Figure 1 As shown, the principle of the hydrogen subsystem of the stacked dual-stack hydrogen fuel cell system in this embodiment is also as follows: Hydrogen gas enters the ejector module from the outside (dry hydrogen gas), passes through the ejector module, and enters the stack through the hydrogen inlet pipe; the hydrogen gas undergoes a reaction inside the stack, and the unreacted hydrogen gas becomes more humid and contains water. It exits from the stack hydrogen gas outlet, passes through the gas-water separator, and most of the water is separated and discharged. The remaining water and hydrogen gas are recycled back by the ejector. Inside the ejector, the hydrogen gas containing water gas mixes with the dry hydrogen gas and passes through the hydrogen inlet pipe again to enter the upper and lower stacks.

[0025] like Figure 2 and Figure 3 As shown, the hydrogen inlet pipe of the dual-reactor system is now designed so that it does not directly enter the lower reactor, but rather... Figure 3 As shown, a three-way structure is directly designed. Hydrogen gas containing moisture flows back into the dual-reactor hydrogen inlet pipe, then branches, rushes straight in, and impacts the horizontal pipe, flowing evenly to the left and right (black arrows). The moisture in the horizontal pipe does not shift to one side due to gravity, thus achieving even distribution of moisture. This solves the problem of low pressure caused by excessive moisture flowing into the lower reactor.

[0026] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A hydrogen pipeline inlet device for improving blind-end single-low hydrogen flow in a stacked dual-reactor system, characterized in that, It includes a gas-water separator (6), a drain valve (7), a fuel cell stack (8), and an ejector module (10); the ejector module (10) includes a particulate filter (1), a hydrogen inlet valve (2), a proportional valve (3), and a dual ejector (4); the particulate filter (1) is connected to the hydrogen inlet valve (2), the hydrogen inlet valve (2) is divided into two outlets and connected to the proportional valve (3) respectively, the proportional valve (3) is connected to the two inlets of the dual ejector (4) respectively, and the outlets of the dual ejector (4) are combined into one and connected to the fuel cell stack (8); The hydrogen return port of the dual ejector (4) is connected to the hydrogen outlet of the steam-water separator (6), and the hydrogen outlet of the fuel cell stack (8) is connected to the hydrogen inlet of the steam-water separator (6).

2. The hydrogen pipeline inlet device for improving blind-end single low hydrogen flow in a stacked dual-reactor system as described in claim 1, characterized in that, The ejector module (10) also includes a safety valve (5), which is located on the pipe between the dual ejectors (4) and the fuel cell stack (8).

3. The hydrogen pipeline inlet device for improving blind-end single-low hydrogen flow in a stacked dual-reactor system as described in claim 1, characterized in that, The fuel cell stack (8) is composed of a first fuel cell stack (8.1) and a second fuel cell stack (8.2) stacked on top of each other.

4. The hydrogen pipeline inlet device for improving blind-end single-low hydrogen flow in a stacked dual-reactor system as described in claim 1, characterized in that, The ejector module (10) is connected to the first stack (8.1) and the second stack (8.2) via a dual-stack hydrogen inlet pipe (12).

5. The hydrogen pipeline inlet device for improving blind-end single low hydrogen flow in a stacked dual-reactor system as described in claim 4, characterized in that, The hydrogen inlet pipe (12) of the dual stack is connected to the center of the first horizontal pipe (12.1) through the diversion point (11). One end of the first horizontal pipe (12.1) is connected to the first fuel cell stack (8.1), and the other end is connected to the vertical pipe (12.2) and then to the second horizontal pipe (12.3). The second horizontal pipe (12.3) is connected to the second fuel cell stack (8.2). The hydrogen inlet pipe of the dual stack does not directly enter the lower stack vertically, but is made into a three-way structure. After the hydrogen enters the hydrogen inlet pipe of the dual stack, it rushes straight, hits the horizontal pipe, and flows out evenly to the left and right.

6. The hydrogen pipeline inlet device for improving blind-end single low hydrogen flow in a stacked dual-reactor system as described in claim 1, characterized in that, A drain valve (7) is connected to the drain outlet of the steam-water separator (6).

7. The hydrogen pipeline inlet device for improving blind-end single low hydrogen flow in a stacked dual-reactor system as described in claim 1, characterized in that, A hydrogen sensor (9.1) is installed on the connecting pipe between the hydrogen inlet valve (2) and the proportional valve (3).

8. The hydrogen pipeline inlet device for improving blind-end single low pressure in a stacked dual-reactor system as described in claim 1, characterized in that, A first pressure sensor (9.2) is installed on the pipe between the dual ejectors (4) and the fuel cell stack (8).

9. The hydrogen pipeline inlet device for improving blind-end single low hydrogen flow in a stacked dual-reactor system as described in claim 1, characterized in that, A second pressure sensor (9.3) is installed on the pipeline between the steam-water separator (6) and the fuel cell stack (8).

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