Hydrogen fuel cell vehicle tail hydrogen elimination device

Abstract

The present invention discloses a hydrogen fuel cell vehicle tail hydrogen elimination device, comprising a housing, a gas distribution shell, a gas diversion device and a catalyst. The hydrogen fuel cell vehicle tail hydrogen elimination device provided by the present invention forms a gas distribution chamber at the gas inlet of the housing, and a gas diversion device composed of a plurality of gas diversion disks is provided in the gas distribution chamber. The provision of the gas diversion device changes the gas flow field, greatly increasing the contact area between the exhaust gas and the catalyst, so that the exhaust gas flow can more fully, quickly and evenly contact the filled catalyst, thereby improving the hydrogen removal efficiency. After the first round of catalytic oxidation by the catalyst in the first chamber, the exhaust gas is remixed in the cavity of the second chamber and then enters the third chamber. The catalyst filled in the third chamber further oxidizes the residual hydrogen in the exhaust gas, so that the concentration of hydrogen in the gas finally discharged to the outside can be ignored, thereby optimizing the hydrogen removal effect.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrogen fuel cell vehicles, and in particular to a hydrogen elimination device at the rear of a hydrogen fuel cell vehicle. Background Art

[0002] With the development of the hydrogen economy, hydrogen fuel cell technology has also seen significant growth. Hydrogen fuel cells use pure hydrogen as fuel and oxygen as an oxidant. Under the action of a catalyst, hydrogen undergoes an oxidation reaction at the anode and a reduction reaction at the cathode, converting the chemical energy stored in the hydrogen into electrical energy for power generation. The only reaction product is water, making this a very clean power generation technology. In recent years, with the continuous advancement of intelligent coal mining, hydrogen fuel cell vehicles are gradually being adopted in production scenarios such as coal mines. During operation, hydrogen fuel cell vehicles inevitably emit a small amount of hydrogen through the tailpipe. Currently, the common dilution emission treatment method reduces the concentration of hydrogen in the exhaust gas to below the emission concentration standard. However, this does not truly reduce hydrogen emissions and poses an explosion risk in the relatively confined spaces of mines (the explosion limit of hydrogen is 4%-75%).

[0003] To ensure the safe use of hydrogen fuel cell vehicles in mines, residual hydrogen in the vehicle's exhaust needs to be treated. Related technologies use catalyst-loaded tail hydrogen removal devices to eliminate residual hydrogen in the exhaust. These devices are complex, often constructed with multiple through-holes or other complex structures to increase the contact area between the catalyst and the exhaust. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems in the related art to a certain extent. To this end, an embodiment of the present invention provides a hydrogen removal device for a hydrogen fuel cell vehicle tailgate with a simple structure and high hydrogen removal efficiency.

[0005] The hydrogen elimination device at the rear of a hydrogen fuel cell vehicle according to an embodiment of the present invention includes: a shell, wherein a first chamber, a second chamber, and a third chamber connected in sequence are provided in the shell, and an air inlet and an air outlet are provided on the shell, wherein the air inlet is connected to the first chamber, and the air outlet is connected to the third chamber; a gas distribution shell, wherein the gas distribution shell is located in the first chamber and is connected to the air inlet, a gas distribution chamber is defined in the gas distribution shell, and the side wall of the gas distribution shell is a porous wall; a gas diverter device, wherein the gas diverter device is located in the gas distribution chamber, and the gas diverter device includes a plurality of gas diverter disks, and the plurality of gas diverter disks are arranged at intervals in the air intake direction; a catalyst, wherein the catalyst is filled in the portion of the first chamber located outside the gas distribution shell, and in the third chamber.

[0006] The hydrogen fuel cell vehicle tail hydrogen elimination device provided by the embodiment of the present invention forms a gas distribution chamber at the gas inlet of the shell, and a gas diversion device composed of a plurality of gas diversion disks is provided in the gas distribution chamber. The provision of the gas diversion device changes the gas flow field, greatly increasing the contact area between the exhaust gas and the catalyst, so that the exhaust gas flow can contact the filled catalyst more fully, quickly and evenly, thereby improving the hydrogen removal efficiency. After the first round of catalytic oxidation by the catalyst in the first chamber, the exhaust gas is remixed in the cavity of the second chamber and then enters the third chamber. The catalyst filled in the third chamber further oxidizes the residual hydrogen in the exhaust gas, so that the concentration of hydrogen in the gas finally discharged to the outside can be ignored, thereby optimizing the hydrogen removal effect.

[0007] Therefore, the hydrogen fuel cell vehicle tail hydrogen elimination device provided by the embodiment of the present invention has a simple structure for increasing the contact area between the catalyst and the tail gas, high hydrogen removal efficiency, and good hydrogen removal effect.

[0008] In some embodiments, a side surface of the gas diverter plate facing the gas inlet protrudes toward the gas inlet to form an arc surface.

[0009] In some embodiments, center lines of a plurality of the gas diverter plates coincide with each other and extend along the gas inlet direction.

[0010] In some embodiments, a diameter of the gas diverter plate close to the gas inlet is smaller than a diameter of the gas diverter plate far from the gas inlet.

[0011] In some embodiments, the gas distribution shell is a hollow cylinder, the central axis of the gas distribution shell extends along the air intake direction, the gas distribution shell has a first end and a second end on its central axis, the first end is opposite to and connected to the air intake, the second end has a sealing plate, and the side wall of the gas distribution shell is a porous structure.

[0012] In some embodiments, the air inlet and the air outlet are opposite to each other in a first direction, and the first chamber, the second chamber, and the third chamber are arranged in sequence in the first direction.

[0013] In some embodiments, the shell further includes an air outlet cavity, and the air outlet cavity is located between the third chamber and the air outlet.

[0014] In some embodiments, the hydrogen elimination device at the rear of a hydrogen fuel cell vehicle includes a first porous disk, a second porous disk, and a third porous disk located in the shell, wherein the first porous disk is located between the first chamber and the second chamber, the second porous disk is located between the second chamber and the third chamber, and the third porous disk is located between the third chamber and the air outlet cavity.

[0015] In some embodiments, the shell includes a top cover, a front section body, a rear section body and a bottom cover connected in sequence, the first porous disk is located between the front section body and the rear section body, the third porous disk is located between the rear section body and the bottom cover, and the second porous disk is located in the rear section body.

[0016] In some embodiments, a limiting portion is provided on the inner wall surface of the rear section body, one side of the second porous disk abuts against the side of the limiting portion close to the air outlet, and the other side of the second porous disk abuts against the catalyst filled in the third chamber for limiting. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of a hydrogen fuel cell vehicle tail hydrogen elimination device in an embodiment of the present invention.

[0018] Figure 2 It is a schematic diagram of the internal structure of the hydrogen fuel cell vehicle tail hydrogen elimination device in an embodiment of the present invention.

[0019] Figure 3 Schematic diagram of the structure of the gas diversion device in an embodiment of the present invention.

[0020] Figure 4 Schematic diagram of the structure of the first porous disk in an embodiment of the present invention.

[0021] Figure 5 This is a flow field simulation diagram of the tail hydrogen elimination device without a gas diversion device.

[0022] Figure 6 This is a flow field simulation diagram of the tail hydrogen elimination device with a gas diversion device.

[0023] Reference numerals:

[0024] A hydrogen fuel cell vehicle rear hydrogen elimination device 100, a shell 1, a first chamber 11, a second chamber 12, a third chamber 13, an air inlet 14, an air outlet 15, an air outlet cavity 16, a top cover 101, a front section body 102, a rear section body 103, a bottom cover 104, a limiting portion 105, a gas distribution shell 2, a gas distribution cavity 21, a sealing plate 22, a gas diversion device 3, a gas diversion disk 31, a connecting rod 32, a first porous disk 41, a second porous disk 42, and a third porous disk 43. DETAILED DESCRIPTION

[0025] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0026] The following is based on Figure 1-Figure 4The hydrogen fuel cell vehicle tail hydrogen elimination device 100 provided by an embodiment of the present invention is described. The hydrogen fuel cell vehicle tail hydrogen elimination device 100 includes a housing 1, a gas distribution shell 2, a gas diversion device 3 and a catalyst.

[0027] The shell 1 is provided with a first chamber 11, a second chamber 12, and a third chamber 13 which are connected in sequence. The shell 1 is provided with an air inlet 14 and an air outlet 15. The air inlet 14 is connected to the first chamber 11, and the air outlet 15 is connected to the third chamber 13. The second chamber 12 is located between the first chamber 11 and the third chamber 13.

[0028] The gas distribution housing 2 is located within the first chamber 11 and communicates with the gas inlet 14. A gas distribution chamber 21 is defined within the housing 2, and the sidewalls of the housing 2 are porous. A gas diverter 3 is located within the gas distribution chamber 21 and includes a plurality of gas diverter discs 31 spaced apart in the direction of gas inlet. A catalyst is filled in the portion of the first chamber 11 outside the gas distribution housing 2, as well as in the third chamber 13.

[0029] The exhaust gas of the hydrogen fuel cell vehicle enters the shell 1 from the air inlet 14, and first enters the gas distribution chamber 21 defined by the gas distribution shell 2 located in the first chamber 11. In the gas distribution chamber 21, it contacts the gas diversion plate 31 of the gas diversion device 3. The gas diversion plate 31 changes the direction of the airflow so that the exhaust gas can evenly enter the first chamber 11 through the through holes on the side wall of the gas distribution shell 2, contact the catalyst filled in the first chamber 11 outside the gas distribution shell 2, and undergo a catalytic oxidation reaction. Then, the exhaust gas enters the second chamber 12, and then enters the third chamber 13 and contacts the catalyst filled in the third chamber 13. The residual hydrogen continues to undergo a catalytic oxidation reaction and is consumed, and the treated gas is finally discharged from the outlet 15.

[0030] The hydrogen fuel cell vehicle tail hydrogen elimination device provided by the embodiment of the present invention forms a gas distribution chamber at the gas inlet of the shell, and a gas diversion device composed of a plurality of gas diversion disks is provided in the gas distribution chamber. The provision of the gas diversion device changes the gas flow field, greatly increasing the contact area between the exhaust gas and the catalyst, so that the exhaust gas flow can contact the filled catalyst more fully, quickly and evenly, thereby improving the hydrogen removal efficiency. After the first round of catalytic oxidation by the catalyst in the first chamber, the exhaust gas is remixed in the cavity of the second chamber and then enters the third chamber. The catalyst filled in the third chamber further oxidizes the residual hydrogen in the exhaust gas, so that the concentration of hydrogen in the gas finally discharged to the outside can be ignored, thereby optimizing the hydrogen removal effect.

[0031] Therefore, the hydrogen fuel cell vehicle tail hydrogen elimination device provided by the embodiment of the present invention has a simple structure for increasing the contact area between the catalyst and the tail gas, high hydrogen removal efficiency, and good hydrogen removal effect.

[0032] The following is based on Figure 1-Figure 4 A hydrogen fuel cell vehicle tail hydrogen elimination device 100 in a specific embodiment of the present invention is described. The hydrogen fuel cell vehicle tail hydrogen elimination device 100 includes a housing 1, a gas distribution shell 2, a gas diversion device 3 and a catalyst.

[0033] like Figure 1 As shown, the shell 1 includes a top cover 101, a front section main body 102, a rear section main body 103 and a bottom cover 104. The front section main body 102 and the rear section main body 103 are both cylindrical structures, and the top cover 101, the front section main body 102, the rear section main body 103 and the bottom cover 104 are connected in sequence. Optionally, connecting bolts can be used to connect the two adjacent ones. The air inlet 14 is provided on the top cover 101, and the air outlet 15 is provided on the bottom cover 104. The air inlet 14 and the air outlet 15 are opposite to each other in a first direction, and the first direction is the flow direction of the exhaust gas (such as Figure 2 ). The first chamber 11, the second chamber 12 and the third chamber 13 are arranged in sequence in the first direction.

[0034] The top cover 101 and the front body 102 together define the first chamber 11, and the second chamber 12 and the third chamber 13 are located in the rear body 103. Figure 2 As shown, the housing 1 further includes an air outlet cavity 16 defined by the bottom cover 104 . The air outlet cavity 16 is located downstream of the third chamber 13 and between the third chamber 13 and the air outlet 15 , for connecting the third chamber 13 and the air outlet 15 .

[0035] like Figure 2 As shown, the hydrogen fuel cell vehicle tail hydrogen elimination device 100 provided in this embodiment includes a first porous disk 41, a second porous disk 42, and a third porous disk 43 located within a housing 1. The first porous disk 41 is located between the first chamber 11 and the second chamber 12. The numerous through-holes on the first porous disk 41 connect the first chamber 11 and the second chamber 12. The diameter of the through-holes of the first porous disk 41 is smaller than the diameter of the catalyst particles filled in the first chamber 11. The first porous disk 41 is used to confine the catalyst filled in the first chamber 11 and connect the first chamber 11 and the second chamber 12.

[0036] The second porous disk 42 is located between the second chamber 12 and the third chamber 13. The numerous through holes on the second porous disk 42 connect the second chamber 12 and the third chamber 13. The diameter of the through holes of the second porous disk 42 is smaller than the diameter of the catalyst particles filled in the third chamber 13. The second porous disk 42 is used to confine the catalyst filled in the third chamber 13 and connect the second chamber 12 and the third chamber 13.

[0037] The third porous disk 43 is located between the third chamber 13 and the gas outlet cavity 16. The numerous through holes on the third porous disk 43 connect the third chamber 13 and the gas outlet cavity 16. The diameter of the through holes of the third porous disk 43 is smaller than the diameter of the catalyst particles filled in the third chamber 13. The third porous disk 43 is used to confine the catalyst filled in the third chamber 13 and connect the third chamber 13 and the gas outlet cavity 16.

[0038] The structures of the first porous disk 41, the second porous disk 42 and the third porous disk 43 can be referred to Figure 4 .

[0039] like Figure 2 As shown, the first porous disc 41 is located between the front body 102 and the rear body 103, and the third porous disc 43 is located between the rear body 103 and the bottom cover 104. The second porous disc 42 is located in the rear body 103 and is used to separate the second chamber 12 and the third chamber 13 in the rear body 103.

[0040] In order to limit the positions of the first porous disk 41, the second porous disk 42 and the third porous disk 43 in the first direction, in this embodiment, as shown in FIG. Figure 1 As shown, the first porous disk 41 is sandwiched between the front section body 102 and the rear section body 103 , and the third porous disk 43 is sandwiched between the rear section body 103 and the bottom cover 104 .

[0041] Specifically, if Figure 1 and Figure 2 As shown, the rear end of the top cover 101, the front and rear ends of the front section body 102, the front and rear ends of the rear section body 103, and the front section of the bottom cover 104 are all equipped with flange structures. The rear end flange of the top cover 101 is connected to the front end flange of the front section body 102. The first porous disk 41 is sandwiched between the rear end flange of the front section body 102 and the front end of the rear section body 103, connected by connecting bolts. The third porous disk 43 is sandwiched between the rear end flange of the rear section body 103 and the front end flange of the bottom cover 104, connected by connecting bolts. This fixes the positions of the first and third porous disks 41 and 43.

[0042] like Figure 2 As shown, a limiting portion 105 is provided on the inner wall surface of the rear section main body 103, one side of the second porous disk 42 is abutted against the side of the limiting portion 105 close to the air outlet 15, and the other side of the second porous disk 42 is abutted against the catalyst filled in the third chamber 13 and limited. That is to say, the second porous disk 42 is limited by the limiting portion 105 in the direction toward the air inlet 14, and is squeezed and fixed by the catalyst in the third chamber 13 in the direction toward the air outlet 15.

[0043] It should be noted that the connection between the top cover 101, the front section main body 102, the rear section main body 103 and the bottom cover 104 of the hydrogen fuel cell vehicle rear hydrogen elimination device 100 in the embodiment of the present invention can be connected by bolts or by clamps. There is no restriction here. Both methods are designed for easy disassembly.

[0044] In addition, the first porous disk 41 , the second porous disk 42 , the third porous disk 43 and the housing 1 may be installed in other ways, preferably in a way that is easy to disassemble.

[0045] Since the relevant technology generally coats the catalyst in the gas flow channel in the tail hydrogen elimination device, it is difficult to replace the catalyst in the tail hydrogen elimination device after the catalyst is poisoned and deactivated due to the complex gas environment, and the cost of replacing the catalyst is also high.

[0046] The shell 1 of the hydrogen fuel cell vehicle tail hydrogen elimination device 100 provided in an embodiment of the present invention is easy to disassemble and assemble, and the connections between different parts of the shell 1 are fixed by bolts or clamps. When the catalyst is deactivated, it is only necessary to disassemble the shell 1, take out the deactivated catalyst, and refill it with a new catalyst. The catalyst is easy to replace, which solves the problem of difficulty in replacing the catalyst in the tail hydrogen elimination device in the related art.

[0047] The gas distribution shell 2 is located in the first chamber 11. In this embodiment, Figure 2 As shown, the gas distribution housing 2 is hollow cylindrical, with its central axis extending in the direction of gas inlet, which is the same as the first direction. The gas distribution housing 2 has a first end and a second end on its central axis. The first end of the gas distribution housing 2 is opposite and connected to the gas inlet 14 of the housing 1. A sealing plate 22 is provided at the second end of the gas distribution housing 2. The sidewalls of the gas distribution housing 2 have a porous structure.

[0048] like Figure 3 As shown, the gas diversion device 3 in this embodiment is located in the gas distribution chamber 21 of the gas distribution shell 2. The gas diversion device 3 includes three gas diversion plates 31. The three gas diversion plates 31 are spaced apart in the first direction, and the central axes coincide with each other. They all extend along the air intake direction (first direction).

[0049] In order to connect the three gas distribution plates 31, as shown in FIG. Figure 3 As shown, the gas diversion device 3 also includes a connecting rod 32, one end of the connecting rod 32 is connected to the sealing plate 22, and the other end extends toward the air inlet 14. The three gas diversion plates 31 are all mounted on the connecting rod 32 and fixed to each other.

[0050] The gas diverter plate 31 changes the direction of the gas flow entering the gas distribution chamber 21 so that the exhaust gas can flow evenly toward the catalyst filled in the first chamber 11 .

[0051] Furthermore, if Figure 2 and Figure 3 As shown, the side of the gas diverter plate 31 facing the air inlet 14 protrudes toward the air inlet 14 to form an arc surface. The design of the arc surface enables the gas diverter plate 31 to conduct drainage more smoothly, disperse the exhaust gas evenly to the surroundings, and allow the exhaust gas to enter the first chamber 11 from the pores on the side wall of the gas distribution shell 2 after dispersion to contact the catalyst.

[0052] Furthermore, the diameter of the gas diverter plate 31 close to the gas inlet 14 is smaller than the diameter of the gas diverter plate 31 far from the gas inlet 14 , so as to achieve a better diverting effect.

[0053] During operation of the hydrogen fuel cell vehicle tail hydrogen elimination device 100 in this embodiment, hydrogen-containing exhaust gas first enters the gas distribution chamber 21 from the air inlet 14. When the exhaust gas passes through the gas diversion device 3, diversion occurs. The gas diversion plate 31 of the gas diversion device 3 changes the flow direction of the exhaust gas, allowing the exhaust gas to flow evenly into the catalyst filled in the front section body 102, greatly increasing the contact area between the exhaust gas and the catalyst and improving the hydrogen removal efficiency. After passing through the first chamber 11, the exhaust gas is remixed in the second chamber 12 and then enters the third chamber 13. The catalyst filled in the third chamber 13 further oxidizes the residual hydrogen in the exhaust gas, making the hydrogen concentration in the gas ultimately discharged to the outside negligible.

[0054] The inventors analyzed the flow field of the tail hydrogen elimination device 100 with and without the gas diversion device 3 using Fluent software. The results are as follows: Figure 5 and Figure 6 It can be observed that, compared with the flow field of the tail hydrogen elimination device 100 without the gas splitter 3 , the flow field of the tail hydrogen elimination device 100 with the gas splitter 3 shows that the contact area between the tail gas and the catalyst is significantly increased.

[0055] This embodiment employs a multi-stage conical gas diversion device 3 within gas diversion chamber 21 to redirect gas flow and increase the contact area between the gas and the catalyst. Furthermore, multiple chambers are designed within housing 1, and catalyst is filled into these chambers, further catalyzing the conversion of the catalyst into oxidized hydrogen, further improving hydrogen removal efficiency.

[0056] When water vapor generated during the operation of the hydrogen fuel cell affects the activity of the catalyst, a molecular sieve can be filled in the first chamber 11 to remove water. The exhaust gas after dehydration passes through the second chamber 12 and is then catalytically oxidized and eliminated by the catalyst in the third chamber 13.

[0057] In summary, the beneficial technical effects brought about by the hydrogen fuel cell vehicle tail hydrogen elimination device 100 according to the embodiment of the present invention are: the structure of the catalytic tail hydrogen elimination device is simplified, and the preparation cost of the device is reduced; the contact area between the catalyst and the tail gas is increased, and the service life of the device in extreme gas environments is extended; the device is easy to disassemble and the catalyst is convenient to replace.

[0058] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0059] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0060] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0061] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0062] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0063] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A hydrogen fuel cell vehicle tail hydrogen elimination device, characterized in that: include: a housing, wherein a first chamber, a second chamber, and a third chamber are sequentially connected to each other, and an air inlet and an air outlet are formed on the housing, wherein the air inlet is connected to the first chamber, and the air outlet is connected to the third chamber; a gas distribution shell, the gas distribution shell being located in the first chamber and communicating with the gas inlet, the gas distribution shell defining a gas distribution cavity, and the sidewall of the gas distribution shell being a porous wall; A gas diverter device, the gas diverter device is located in the gas distribution chamber, the gas diverter device includes a plurality of gas diverter disks, and the plurality of gas diverter disks are arranged at intervals in the gas inlet direction; A catalyst is filled in a portion of the first chamber located outside the gas distribution shell and in the third chamber.

2. The hydrogen fuel cell vehicle tail hydrogen elimination device according to claim 1, characterized in that: The side surface of the gas diverter plate facing the air inlet protrudes toward the air inlet to form an arc surface.

3. The hydrogen fuel cell vehicle tail hydrogen elimination device according to claim 1, characterized in that: The center lines of the plurality of gas diverter plates coincide with each other and extend along the gas inlet direction.

4. The hydrogen removal device for the rear end of a hydrogen fuel cell vehicle according to any one of claims 1 to 3, characterized in that: The diameter of the gas diverter plate close to the gas inlet is smaller than the diameter of the gas diverter plate far from the gas inlet.

5. The hydrogen removal device for the rear end of a hydrogen fuel cell vehicle according to any one of claims 1 to 3, characterized in that: The gas distribution shell is a hollow cylindrical shell, and the central axis of the gas distribution shell extends along the air intake direction. The gas distribution shell has a first end and a second end on its central axis. The first end is opposite to and connected to the air intake port, and the second end has a sealing plate. The side wall of the gas distribution shell is a porous structure.

6. The hydrogen removal device for the rear end of a hydrogen fuel cell vehicle according to any one of claims 1 to 3, characterized in that: The air inlet and the air outlet are opposite to each other in a first direction, and the first chamber, the second chamber, and the third chamber are arranged in sequence in the first direction.

7. The hydrogen fuel cell vehicle tail hydrogen elimination device according to claim 1 or 6, characterized in that: The shell also includes an air outlet cavity, which is located between the third chamber and the air outlet.

8. The hydrogen fuel cell vehicle tail hydrogen elimination device according to claim 7, characterized in that: It includes a first porous disk, a second porous disk and a third porous disk located in the shell, the first porous disk is located between the first chamber and the second chamber, the second porous disk is located between the second chamber and the third chamber, and the third porous disk is located between the third chamber and the air outlet chamber.

9. The hydrogen fuel cell vehicle tail hydrogen elimination device according to claim 8, characterized in that: The shell includes a top cover, a front section body, a rear section body and a bottom cover connected in sequence, the first porous disk is located between the front section body and the rear section body, the third porous disk is located between the rear section body and the bottom cover, and the second porous disk is located in the rear section body.

10. The hydrogen fuel cell vehicle tail hydrogen elimination device according to claim 9, characterized in that: A limiting portion is provided on the inner wall surface of the rear section body, one side of the second porous disk abuts against a side of the limiting portion close to the gas outlet, and the other side of the second porous disk abuts against the catalyst filled in the third chamber to limit the position.

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