Fuel cell exhaust gas treatment device

Abstract

To provide a fuel cell exhaust gas treatment device capable of reducing the concentration of target gas in exhaust gas discharged from a fuel cell.SOLUTION: A fuel cell exhaust gas treatment device according to the present invention includes a piping member (100) that exhausts exhaust gas from a fuel cell stack (20), a gas guide portion (200) that is provided in the piping member (100) and guides target gas contained in the exhaust gas to the outside of the piping member, and a guide pipe (300) that is spaced apart from the gas guide portion and is provided so as to cover the gas guide portion.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to an exhaust gas treatment device for a fuel cell, and more specifically to an exhaust gas treatment device for a fuel cell that can reduce the concentration of a target gas in exhaust gas discharged from a fuel cell. [Background technology]

[0002] A fuel cell system is a system that continuously generates electrical energy through a chemical reaction of a continuously supplied fuel, and research and development of the system has been ongoing as an alternative solution to global environmental problems.

[0003] Fuel cell systems can be classified into phosphoric acid fuel cells (PAFCs), molten carbonate fuel cells (MCFCs), solid oxide fuel cells (SOFCs), polymer electrolyte membrane fuel cells (PEMFCs), alkaline fuel cells (AFCs), and direct methanol fuel cells (DMFCs) depending on the type of electrolyte used. Depending on the type of fuel used, operating temperature, output range, etc., fuel cell systems can be used in a variety of applications, such as mobile power generation, transportation, and distributed power generation.

[0004] Among these, polymer electrolyte fuel cells are being applied to the field of hydrogen vehicles (hydrogen fuel cell vehicles), which are being developed as a replacement for internal combustion engines.

[0005] A hydrogen vehicle includes a fuel cell stack that generates electricity through an oxidation-reduction reaction between hydrogen (H) and oxygen (O2), and is configured to run by driving a motor with the electricity generated from the fuel cell stack.

[0006] On the other hand, exhaust gases emitted from fuel cells (for example, exhaust gases emitted when a fuel cell is initially started) may contain hydrogen, but if the hydrogen concentration in the exhaust gases increases to a certain level, the risk of explosion increases, so regulations stipulate that the hydrogen concentration in the exhaust gases from fuel cells must be kept below a certain level.

[0007] One method proposed for reducing the hydrogen concentration in the exhaust gas of a fuel cell is to reduce the residual hydrogen concentration in the fuel cell (e.g., the concentration of hydrogen remaining inside the fuel cell when the fuel cell is not started) or to reduce the supply rate of air supplied to the fuel cell.

[0008] However, if the residual hydrogen concentration in the fuel cell drops below a certain level, oxidation occurs inside the fuel cell, reducing its durability. Also, if the air supply rate to the fuel cell is reduced, it becomes difficult to ensure a rapid increase in the fuel cell's output.

[0009] Other methods proposed for reducing the hydrogen concentration in the fuel cell exhaust gas include filtering the hydrogen in the fuel cell exhaust gas using a separate filter, and forcibly supplying air into the exhaust pipe through which the fuel cell exhaust gas is discharged.

[0010] However, in order to filter hydrogen from the exhaust gas of the fuel cell or to forcibly supply air into the exhaust pipe, an expensive filter or fan (air supply fan) must be installed, which not only increases costs but also complicates the structure, reducing design freedom and space utilization.

[0011] Therefore, various researches have been conducted recently to effectively reduce the hydrogen concentration in the exhaust gas emitted from fuel cells and to simplify the structure, but the results are still insufficient, and further developments in this area are required. Summary of the Invention [Problem to be solved by the invention]

[0012] An object of an embodiment of the present invention is to provide an exhaust gas treatment device for a fuel cell that can reduce the concentration of a target gas in exhaust gas discharged from the fuel cell.

[0013] In particular, embodiments of the present invention are directed to reducing the concentration of hydrogen in exhaust gases emitted from fuel cells.

[0014] Furthermore, the embodiments of the present invention aim to simplify the structure and improve space utilization and design freedom.

[0015] Embodiments of the present invention also aim to improve safety and reliability.

[0016] Furthermore, embodiments of the present invention aim to simplify the manufacturing process and reduce costs.

[0017] Additionally, embodiments of the present invention aim to ensure the durability and extend the life of fuel cells.

[0018] The problems to be solved by the embodiments are not limited to these, and can be said to include the means for solving the problems described below and the purposes and effects that can be grasped from the embodiments. [Means for solving the problem]

[0019] According to a preferred embodiment of the present invention for achieving the above-mentioned object of the present invention, an exhaust gas treatment device for a fuel cell includes a piping member that exhausts exhaust gas from a fuel cell stack, a gas guide section that is provided in the piping member and guides target gas contained in the exhaust gas to the outside of the piping member, and a guide pipe that is positioned away from the gas guide section and is provided to cover the gas guide section.

[0020] This is to reduce the concentration of the target gas (for example, hydrogen) in the exhaust gas discharged from the fuel cell.

[0021] In other words, the exhaust gas discharged from a fuel cell (for example, the exhaust gas discharged when the fuel cell is initially started) may contain hydrogen, but if the hydrogen concentration in the exhaust gas increases to a certain level, the risk of explosion increases, so the hydrogen concentration in the exhaust gas from the fuel cell must be maintained below a certain level.

[0022] Conventional methods for reducing the hydrogen concentration in the exhaust gas of a fuel cell include reducing the residual hydrogen concentration in the fuel cell (for example, the concentration of hydrogen remaining inside the fuel cell when the fuel cell is not started) or reducing the supply rate of air to the fuel cell. However, if the residual hydrogen concentration in the fuel cell drops below a certain level, oxidation occurs inside the fuel cell, reducing its durability, and if the supply rate of air to the fuel cell is reduced, it becomes difficult to ensure a rapid increase in the fuel cell's output.

[0023] Other methods proposed for reducing the hydrogen concentration in fuel cell exhaust gas include filtering hydrogen from the fuel cell exhaust gas using a separate filter and forcibly supplying air into the exhaust pipe through which the fuel cell exhaust gas is discharged. However, filtering hydrogen from the fuel cell exhaust gas or forcibly supplying air into the exhaust pipe requires the installation of an expensive filter or fan (air supply fan), which not only increases costs but also complicates the structure, reducing design flexibility and space utilization.

[0024] However, an embodiment of the present invention has the advantageous effect of reducing the concentration of the target gas in the exhaust gas discharged to the outlet (end) of the piping member by discharging a portion of the target gas contained in the exhaust gas in advance through the gas guide section before the exhaust gas is discharged from the outlet (end) of the piping member.

[0025] Most importantly, the embodiment of the present invention has the advantageous effect of significantly reducing the concentration of hydrogen in the exhaust gas discharged to the outlet of the piping member by allowing the hydrogen contained in the exhaust gas to be pre-discharged through the gas guide portion.

[0026] The piping member can be provided as various structures capable of discharging exhaust gases.

[0027] As an example, the piping member may include a first piping and a second piping provided spaced apart from the first piping, and the gas guide slot may be defined between the first piping and the second piping.

[0028] According to a preferred embodiment of the present invention, the first pipe and the second pipe may be provided to have the same diameter as each other, and the first pipe and the second pipe may be arranged coaxially with each other.

[0029] The gas guide can be provided as various structures capable of guiding the target gas to the outside of the piping member.

[0030] Preferably, the gas guide may be provided at a distance from the distal end of the piping member.

[0031] As an example, the gas guide portion may include a gas guide slot formed continuously along the circumferential direction of the piping member.

[0032] The guide pipe is provided to reduce the concentration of the target gas (for example, hydrogen) that is guided (discharged) to the outside of the piping member through the gas guide portion.

[0033] In other words, by providing a gas guide section in the piping member, the hydrogen concentration in the exhaust gas discharged to the outlet of the piping member can be reduced, but since a relatively high concentration of hydrogen is discharged through the gas guide section, there is a problem in that the risk of a hydrogen explosion increases near the gas guide section.

[0034] However, an embodiment of the present invention provides a guide pipe outside the piping member (outside the gas guide section) and allows hydrogen and external air to mix through the guide pipe, thereby achieving the advantageous effect of reducing the hydrogen concentration near the gas guide section and reducing the risk of explosion.

[0035] Preferably, a mixing space communicating with the outside is defined between the gas guide portion and the guide pipe, and the target gas and the outside air can be mixed in the mixing space.

[0036] More preferably, both ends of the mixing space along the longitudinal direction of the piping member can communicate with the outside.

[0037] The guide pipe can be provided in various structures that can define a mixing space in which hydrogen and external air can be mixed.

[0038] According to a preferred embodiment of the present invention, the guide pipe may include a guide ring, and the guide ring may be provided so as to entirely surround the periphery of the gas guide slot.

[0039] According to a preferred embodiment of the present invention, the first and second pipes may be formed to have different diameters.

[0040] As an example, a first tubing can be provided having a first diameter and a second tubing can be provided having a second diameter different from the first diameter.

[0041] According to a preferred embodiment of the present invention, the first and second pipes may be arranged non-coaxially.

[0042] According to a preferred embodiment of the present invention, the guide pipe may be disposed at an angle relative to the pipe member.

[0043] According to a preferred embodiment of the present invention, the guide pipe may include a first guide pipe section provided to surround the periphery of the first pipe and formed to have a diameter that gradually decreases from the first inlet to the first outlet, and a second guide pipe section provided to surround the periphery of the second pipe and formed to have a diameter that gradually increases from the second inlet connected to the first outlet to the second outlet.

[0044] According to a preferred embodiment of the present invention, the gas guide portion may include a gas guide hole formed through the piping member.

[0045] Preferably, the gas guide hole may be formed in at least one of the upper and lower portions of the piping member along the vertical direction.

[0046] According to a preferred embodiment of the present invention, the guide pipe includes a guide plate, which can be provided so as to cover the periphery of the gas guide hole (provided so as to partially cover the periphery of the pipe member).

[0047] The guide plate can be provided in various structures that can define a mixing space in which hydrogen and external air can mix.

[0048] For example, the guide plate may be formed in a straight line so as to partially cover the periphery of the piping member.

[0049] According to another embodiment of the present invention, the guide plate may be formed in a curved shape. For example, the guide plate may include peaks and valleys that are continuously connected to form a waveform.

[0050] The target gas can be varied depending on the required conditions and design specifications. According to a preferred embodiment of the present invention, the target gas can include hydrogen (H). [Brief explanation of the drawings]

[0051] [Figure 1] 1 is a diagram for explaining an example of application of an exhaust gas treatment device for a fuel cell according to an embodiment of the present invention; [Figure 2] 1 is a diagram illustrating an exhaust gas treatment device for a fuel cell according to an embodiment of the present invention; [Figure 3] 10A and 10B are diagrams illustrating a gas guide slot and a guide ring as an exhaust gas treatment device for a fuel cell according to an embodiment of the present invention. [Figure 4] 10A and 10B are diagrams illustrating modified examples of piping members as an exhaust gas treatment device for a fuel cell according to an embodiment of the present invention. [Figure 5] 10A and 10B are diagrams illustrating modified examples of piping members as an exhaust gas treatment device for a fuel cell according to an embodiment of the present invention. [Figure 6] 10A and 10B are diagrams illustrating modified examples of piping members as an exhaust gas treatment device for a fuel cell according to an embodiment of the present invention. [Figure 7] 10A and 10B are diagrams illustrating modified examples of guide piping in an exhaust gas treatment device for a fuel cell according to an embodiment of the present invention. [Figure 8] 10A and 10B are diagrams illustrating modified examples of guide piping in an exhaust gas treatment device for a fuel cell according to an embodiment of the present invention. [Figure 9] 10A and 10B are diagrams illustrating modified examples of guide piping in an exhaust gas treatment device for a fuel cell according to an embodiment of the present invention. [Figure 10] 10A and 10B are diagrams illustrating another embodiment of the gas guide portion of the exhaust gas treatment device for a fuel cell according to an embodiment of the present invention. [Figure 11] 3 is a diagram illustrating a gas guide hole and a guide plate as an exhaust gas processing device for a fuel cell according to an embodiment of the present invention. FIG. [Figure 12] 3 is a diagram illustrating a gas guide hole and a guide plate as an exhaust gas processing device for a fuel cell according to an embodiment of the present invention. FIG. [Figure 13] 10A and 10B are diagrams illustrating modified examples of guide plates as an exhaust gas processing device for a fuel cell according to an embodiment of the present invention. [Figure 14]10A and 10B are diagrams illustrating modified examples of guide plates as an exhaust gas processing device for a fuel cell according to an embodiment of the present invention. [Figure 15] 10A and 10B are diagrams illustrating modified examples of guide plates as an exhaust gas processing device for a fuel cell according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0052] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0053] However, the technical concept of the present invention is not limited to the described embodiments, but can be embodied in various different forms, and one or more of the components of the embodiments can be selectively combined or substituted within the scope of the technical concept of the present invention.

[0054] Furthermore, unless otherwise clearly defined and described, terms (including technical and scientific terms) used in the embodiments of the present invention may be interpreted in a way that can be commonly understood by a person of ordinary skill in the art to which the present invention belongs, and commonly used terms, such as dictionary-defined terms, may be interpreted in light of the contextual meaning of the relevant art.

[0055] Furthermore, the terms used in the embodiments of the present invention are intended to describe the embodiments and are not intended to limit the present invention.

[0056] In this specification, unless otherwise specified in the phrase, the singular can also include the plural, and when it says "A and (and) at least one (or more) of B and C," it can include one or more of all possible combinations of A, B, and C.

[0057] Additionally, terms such as first, second, A, B, (a), (b), etc. may be used to describe components of embodiments of the present invention.

[0058] Such terms are used only to distinguish the component from other components, and are not intended to limit the essence, order, or sequence of the component.

[0059] Furthermore, when a component is described as being "coupled," "coupled," or "connected" to another component, it includes not only the case where the component is directly coupled, coupled, or connected to the other component, but also the case where the component is "coupled," "coupled," or "connected" by yet another component between the component and the other component.

[0060] Furthermore, when it is stated that something is formed or disposed "above (above) or below (below)" each component, "above (above)" or "below (below)" includes not only the case where two components are in direct contact with each other, but also the case where one or more other components are formed or disposed between the two components. Furthermore, when it is expressed as "above (above) or below (below)," it can include not only the meaning of "above (above)" but also the meaning of "below" based on one component.

[0061] 1 to 15, a fuel cell exhaust gas treatment device 10 according to an embodiment of the present invention includes a piping member 100 that exhausts exhaust gas EG from a fuel cell stack 20, a gas guide section 200 that is provided in the piping member 100 and guides target gas TG contained in the exhaust gas EG to the outside of the piping member 100, and a guide piping 300 that is arranged at a distance from the gas guide section 200 and that is provided to cover the gas guide section 200.

[0062] For reference, the fuel cell exhaust gas treatment device 10 according to an embodiment of the present invention can be applied to treat exhaust gas EG emitted from a fuel cell system applied to mobility such as a vehicle, a ship, or an aircraft, and the present invention is not limited or restricted by the type and characteristics of the object (mobility) to which the fuel cell exhaust gas treatment device 10 is applied.

[0063] Below, an example will be described in which a fuel cell exhaust gas treatment device 10 according to an embodiment of the present invention treats exhaust gas EG emitted from a fuel cell stack 20 applied to environmentally friendly vehicles such as hybrid vehicles and / or electric vehicles that obtain driving force from electrical energy.

[0064] The fuel cell stack 20 may be formed in various structures capable of generating electricity through an oxidation-reduction reaction between hydrogen supplied from the hydrogen supply unit 40 and air supplied from the air supply unit 30 .

[0065] For example, the fuel cell stack 20 may include a membrane electrode assembly (MEA) (not shown) having an electrolyte membrane through which hydrogen ions move and catalyst electrode layers attached to both sides of the membrane where electrochemical reactions take place, a gas diffusion layer (GDL) (not shown) that distributes the reactant gas uniformly and transfers the generated electrical energy, a gasket and fastening mechanism (not shown) that maintains airtightness and proper fastening pressure for the reactant gas and coolant, and a bipolar plate (not shown) that transports the reactant gas and coolant.

[0066] More specifically, in the fuel cell stack 20, hydrogen as a fuel and air (oxygen) as an oxidant are supplied to the anode and cathode of the membrane electrode assembly, respectively, through the flow paths of the bipolar plates, with hydrogen being supplied to the anode and air being supplied to the cathode.

[0067] Hydrogen supplied to the anode is decomposed into protons and electrons by the catalyst in the electrode layers formed on both sides of the electrolyte membrane, and only the protons are selectively transferred to the cathode through the electrolyte membrane, which is a cation exchange membrane, and the electrons are transferred to the cathode through the gas diffusion layer and bipolar plate, which are conductors.

[0068] At the cathode, hydrogen ions supplied through the electrolyte membrane and electrons transferred through the bipolar plate come into contact with oxygen in the air supplied to the cathode by an air supply device, and a reaction occurs to produce water. The movement of hydrogen ions during this reaction generates a flow of electrons through an external conductor, and this flow of electrons generates an electric current.

[0069] 2 and 3, the piping member 100 is provided so as to exhaust the exhaust gas EG discharged from the fuel cell stack 20 to the outside.

[0070] The piping member 100 may be provided in various structures capable of discharging the exhaust gas EG, and the present invention is not limited or restricted by the structure of the piping member 100.

[0071] For example, the piping member 100 may include a first piping 110 and a second piping 120 provided at a distance from the first piping 110 .

[0072] For example, the first pipe 110 and the second pipe 120 may be formed to have a circular cross section of a uniform size overall. According to embodiments of the present invention, the first pipe 110 and the second pipe 120 may be formed to have a square cross section or other cross-sectional shape. In addition, an expanded outlet having an expanded cross-sectional area may be formed at the outlet end of the pipe member 100.

[0073] According to a preferred embodiment of the present invention, the first pipe 110 and the second pipe 120 can be provided to have the same diameter D as each other, and the first pipe 110 and the second pipe 120 can be arranged coaxially so as to have the same center of gravity C as each other.

[0074] The gas guide portion 200 is provided in the piping member 100 so as to guide the target gas TG contained in the exhaust gas EG to the outside of the piping member 100 .

[0075] The target gas TG can be variously changed depending on the required conditions and design specifications, and the present invention is not limited or restricted by the type and characteristics of the target gas TG. Preferably, the target gas TG can contain hydrogen (H).

[0076] More specifically, the gas guide portion 200 is provided to reduce the concentration of hydrogen contained in the exhaust gas EG discharged to the outlet of the piping member 100 to a level that satisfies the legal requirements.

[0077] That is, in order to suppress oxidation inside the fuel cell stack when the fuel cell stack is not started, the residual hydrogen concentration in the fuel cell stack must be maintained above a certain level. However, if the fuel cell stack starts operating while the residual hydrogen concentration in the fuel cell stack is maintained above a certain level, the hydrogen remaining in the fuel cell stack is suddenly exhausted, which can cause a sudden increase in the hydrogen concentration in the exhaust gas.

[0078] However, in an embodiment of the present invention, a portion of the hydrogen contained in the exhaust gas EG is pre-discharged through the gas guide section 200 before the exhaust gas EG is discharged from the outlet (end) of the piping member 100, thereby making it possible to reduce the concentration of hydrogen in the exhaust gas EG' that is finally discharged from the outlet of the piping member 100.

[0079] This is because the hydrogen contained in the exhaust gas EG is lighter and more diffusible than other gases (e.g., air) contained in the exhaust gas EG. By providing the gas guide section 200 in the piping member 100, some of the hydrogen contained in the exhaust gas EG can be pre-exhausted through the gas guide section 200 (concentrated exhaust of only the hydrogen in the exhaust gas), which has the advantageous effect of reducing the hydrogen concentration in the exhaust gas EG' that is finally exhausted from the outlet of the piping member 100.

[0080] The gas guide portion 200 can be provided as various structures capable of guiding the target gas TG (e.g., hydrogen) to the outside of the piping member 100, and the present invention is not limited or restricted by the structure and form of the gas guide portion 200.

[0081] Preferably, the gas guide portion 200 may be provided at a predetermined distance from the distal end 101 of the piping member 100 .

[0082] As an example, the gas guide portion 200 may include gas guide slots 210 formed continuously along the circumferential direction of the piping member 100 .

[0083] Preferably, the gas guide slot 210 may be provided in a ring shape corresponding to the space between the first pipe 110 and the second pipe 120 .

[0084] The guide pipe 300 is disposed apart from the gas guide part 200 and is provided so as to cover the gas guide part 200 .

[0085] The guide pipe 300 is provided to reduce the concentration (to diffuse) of the target gas TG (for example, hydrogen) guided (discharged) to the outside of the piping member 100 through the gas guide portion 200.

[0086] In other words, by providing the gas guide section 200 in the piping member 100, the hydrogen concentration in the exhaust gas EG discharged from the outlet of the piping member 100 can be reduced, but since high-concentration hydrogen is discharged in a straight line through the gas guide section 200, the risk of a hydrogen explosion may increase near the gas guide section 200.

[0087] However, in an embodiment of the present invention, a guide pipe 300 is provided outside the piping member 100 (outside the gas guide section), so that hydrogen discharged outside the piping member 100 collides with the guide pipe 300, mixes with the external air OA, and is effectively diffused, thereby achieving the advantageous effect of reducing the hydrogen concentration near the gas guide section 200 and reducing the risk of explosion.

[0088] Preferably, a mixing space 301 communicating with the outside is defined between the gas guide portion 200 and the guide pipe 300, and in the mixing space 301, the target gas TG and the outside air OA can be mixed.

[0089] For reference, in an embodiment of the present invention, the mixing space 301 can be defined as an open space or area where the target gas TG (hydrogen) ejected from the gas guide 200 can be mixed with the external air OA.

[0090] More preferably, both ends of the mixing space 301 along the longitudinal direction of the piping member 100 may be connected to the outside. For example, external air OA may be introduced into one end (the left end in FIG. 2) of the mixing space 301, hydrogen discharged through the gas guide 200 may collide with the inner surface of the guide piping 300 and then be mixed with the external air OA in the mixing space 301, and a mixed gas MG obtained by mixing hydrogen and the external air OA may be discharged to the outside of the guide piping 300 through the other end (the right end in FIG. 2) of the mixing space 301.

[0091] The guide pipe 300 may be provided in various structures capable of defining a mixing space 301 in which hydrogen and external air OA can be mixed, and the present invention is not limited or restricted by the structure and shape of the guide pipe 300.

[0092] According to a preferred embodiment of the present invention, the guide pipe 300 may include a guide ring 310 , which may be provided to entirely surround the periphery of the gas guide slot 210 .

[0093] As an example, the guide ring 310 can be formed in a hollow cylindrical shape having a diameter D' (inner diameter expanded from the outer diameter of the piping member) expanded from the diameter D of the piping member 100 (first pipe and second pipe), and can be arranged parallel to (in parallel with) the piping member 100.

[0094] According to another embodiment of the present invention, it is also possible to configure the guide ring 310 to have a square cross-sectional shape or other cross-sectional shapes.

[0095] In the embodiments of the present invention described above and shown in the drawings, an example is given in which the first pipe 110 and the second pipe 120 are formed to have the same diameter as each other. However, according to other embodiments of the present invention, it is also possible to form the first pipe and the second pipe to have different diameters from each other.

[0096] As an example, referring to FIG. 4, the first pipe 110 can be provided to have a first diameter D1, and the second pipe 120 can be provided to have a second diameter (D2>D1) larger than the first diameter D1.

[0097] At this time, the difference in diameter between the first diameter D1 and the second diameter D2 can be variously changed according to the required conditions and design specifications, and the present invention is not limited or restricted by the difference in diameter between the first diameter D1 and the second diameter D2.

[0098] As another example, referring to FIG. 5, the first pipe 110 can be provided to have a second diameter D2, and the second pipe 120 can be provided to have a first diameter (D1<D2) smaller than the second diameter D2.

[0099] Also, in the embodiments of the present invention described above and shown in the drawings, an example is given in which the first pipe 110 and the second pipe 120 are coaxially arranged to have the same center of gravity as each other. However, according to other embodiments of the present invention, it is also possible to arrange the first pipe and the second pipe non-coaxially.

[0100] As an example, referring to FIG. 6, the first pipe 110 and the second pipe 120 may be arranged non-coaxially (eccentrically) so as to have centers of gravity C1 and C2 spaced apart from each other.

[0101] In the embodiment of the present invention described above and illustrated, an example is given in which the guide pipe 300 is arranged parallel to the piping member 100, but according to other embodiments of the present invention, it is also possible to arrange the guide pipe at an angle relative to the piping member.

[0102] As an example, referring to FIG. 7, the guide pipe 300 (guide ring) may be disposed so as to be inclined at a predetermined angle θ with respect to the first pipe 110 and the second pipe 120.

[0103] In this case, the arrangement angle θ of the guide pipe 300 relative to the first pipe 110 and the second pipe 120 can be changed in various ways depending on the required conditions and design specifications, and the present invention is not restricted or limited by the arrangement angle θ of the guide pipe 300.

[0104] In the embodiment of the present invention described above and illustrated, an example is given in which the guide pipe 300 (guide ring) is formed in the shape of a hollow cylinder having a circular cross section, but according to other embodiments of the present invention, the guide pipe may also be formed to have a kind of trumpet-like shape.

[0105] Referring to FIG. 8, according to a preferred embodiment of the present invention, the guide pipe 300 may include a first guide pipe section 332 that is provided to surround the periphery of the first pipe 110 and has a diameter that gradually decreases from the first inlet 332a to the first outlet 332b, and a second guide pipe section 334 that is provided to surround the periphery of the second pipe 120 and has a diameter that gradually increases from the second inlet 334a connected to the first outlet 332b to the second outlet 334b.

[0106] As an example, the first guide pipe section 332 and the second guide pipe section 334 may be formed in a trumpet shape having an approximately trapezoidal cross section, and the first guide pipe section 332 and the second guide pipe section 334 may be connected to each other in a coordinated manner to form a narrow gourd shape at approximately the center, and the connection point of the first outlet 332b and the second inlet 334a may be located on the periphery of the gas guide slot 210.

[0107] For reference, in the embodiment of the present invention, an example is given in which the connection point of the first outlet 332b and the second inlet 334a is located on the gas guide slot 210, but according to other embodiments of the present invention, it is also possible to position the connection point of the first outlet and the second inlet away from the gas guide slot (so as not to overlap with the gas guide slot along the longitudinal direction of the piping member).

[0108] In the embodiment of the present invention described above and illustrated, an example is given in which the inner surface of the guide pipe 300 (guide ring) is formed in a straight line, but according to other embodiments of the present invention, it is also possible to form the inner surface of the guide pipe (guide ring) in a curved line.

[0109] As an example, referring to FIG. 9, according to a preferred embodiment of the present invention, the inner surface of the guide ring 310 facing the outer surface of the piping member 100 may be formed to have a regular (or irregular) waveform.

[0110] Meanwhile, in the above-described and illustrated embodiments of the present invention, the gas guide portion 200 is described as including the gas guide slot 210, but according to other embodiments of the present invention, the gas guide portion may also include a gas guide hole.

[0111] Referring to Figures 10 to 12, according to a preferred embodiment of the present invention, a fuel cell exhaust gas treatment device 10 includes a piping member 100 that exhausts exhaust gas EG from a fuel cell stack 20, a gas guide section 200 that is provided in the piping member 100 and guides target gas TG contained in the exhaust gas EG to the outside of the piping member 100, and a guide piping 300 that is arranged at a distance from the gas guide section 200 and is provided to cover the gas guide section 200, and in this case, the gas guide section 200 includes a gas guide hole 220 that is formed through the piping member 100.

[0112] The gas guide holes 220 may be provided in various structures capable of guiding the target gas TG (e.g., hydrogen) to the outside of the piping member 100, and the present invention is not limited or restricted by the structure, size, and number of the gas guide portion 200. As an example, three circular gas guide holes 220 may be formed in the piping member 100 at predetermined intervals. According to other embodiments of the present invention, the gas guide holes may be formed in an elliptical shape or other shapes.

[0113] For example, the gas guide hole 220 may be formed in the upper part of the piping member 100 along the vertical direction. Alternatively, the gas guide hole 220 may be formed in the lower part of the piping member 100 along the vertical direction, or the gas guide hole 220 may be formed in both the upper and lower parts of the piping member 100 along the vertical direction.

[0114] Furthermore, according to a preferred embodiment of the present invention, the guide pipe 300 includes a guide plate 320, which can be arranged to cover the periphery of the gas guide hole 220 (partially cover the periphery of the pipe member).

[0115] A mixing space 301 communicating with the outside is defined between the gas guide hole 220 and the guide plate 320, and in the mixing space 301, the target gas TG and the outside air OA can be mixed.

[0116] The guide plate 320 may be provided in various structures capable of defining a mixing space 301 in which hydrogen and external air OA can be mixed, and the present invention is not limited or restricted by the structure and shape of the guide plate 320.

[0117] As an example, the guide plate 320 may be formed in a linear shape (linear plate shape) that can partially cover the periphery of the piping member 100, and a mixing space 301 that is open on all sides may be provided between the gas guide hole 220 and the guide plate 320.

[0118] In the embodiment of the present invention described above and illustrated, an example is given in which the guide plate 320 is arranged parallel to the piping member 100, but according to other embodiments of the present invention, it is also possible to arrange the guide plate at an angle relative to the piping member.

[0119] For example, referring to FIG. 13, the guide plate 320 may be disposed inclined at a predetermined angle θ with respect to the piping member 100 .

[0120] In this case, the arrangement angle θ of the guide plate 320 relative to the piping member 100 can be changed in various ways depending on the required conditions and design specifications, and the present invention is not restricted or limited by the arrangement angle θ of the guide plate 320.

[0121] In the embodiment of the present invention described above and illustrated, the guide plate 320 is formed in a straight line, but in other embodiments of the present invention, the guide plate may be formed in a curved line.

[0122] For example, referring to FIGS. 14 and 15, a guide plate 320' may include peaks 322a' and valleys 322b' that are continuously connected to form a waveform.

[0123] More specifically, the peaks 322a' and valleys 322b' of the guide plate 320' may be alternately arranged along the longitudinal direction of the pipe member 100 to form a continuous wave shape.

[0124] The height of the peaks 322a' and the valleys 322b' and the distance between the peaks 322a' and the valleys 322b' can be changed as appropriate depending on the required conditions and design specifications, and the present invention is not restricted or limited by the size and structure of the peaks 322a' and the valleys 322b'.

[0125] For example, referring to Fig. 15, the peaks 322a' and valleys 322b' of the guide plate 320' may be formed in a pointed shape, or alternatively, as shown in Fig. 14, the peaks 322a' and valleys 322b' of the guide plate 320' may be formed in a gently curved shape.

[0126] As described above, according to the embodiments of the present invention, it is possible to obtain the advantageous effect of reducing the concentration of the target gas in the exhaust gas discharged from the fuel cell.

[0127] In particular, according to the embodiment of the present invention, it is possible to obtain the advantageous effect of effectively reducing the concentration of hydrogen in the exhaust gas discharged from the fuel cell.

[0128] Furthermore, according to the embodiment of the present invention, advantageous effects can be obtained such that the structure is simplified, and space utilization and design freedom are improved.

[0129] Additionally, embodiments of the present invention can provide advantageous effects of improving safety and reliability.

[0130] Furthermore, according to the embodiment of the present invention, it is possible to obtain advantageous effects such as simplifying the manufacturing process and reducing costs.

[0131] Furthermore, the embodiments of the present invention can provide the advantageous effect of ensuring the durability of the fuel cell and extending its lifespan.

[0132] The above description focuses on the embodiments, but these are merely examples and do not limit the present invention. Those skilled in the art will recognize that various modifications and applications not exemplified above are possible within the scope of the essential characteristics of the present invention. For example, each component specifically illustrated in the embodiments can be modified and implemented. Furthermore, differences related to such modifications and applications should be construed as being included within the scope of the present invention as defined by the appended claims. [Explanation of symbols]

[0133] 10. Fuel cell exhaust gas treatment device 20 Fuel Cell Stack 30 Air supply section 40 Hydrogen supply unit 100 Piping components 101 Terminal 110 First Pipe 120 Second Pipe 200 Gas guide 210 Gas guide slot 220 Gas guide hole 300 Guide piping 301 Mixed space 310 Guide Ring 320, 320' guide plate 322a' Yamabe 322b' Tanibe 332 First guide piping section 332a 1st entrance 332b Exit 1 334 Second guide piping section 334a Second Entrance 334b 2nd exit

Claims

1. a piping member for discharging exhaust gas from the fuel cell stack; a gas guide portion provided in the piping member and configured to guide a target gas contained in the exhaust gas to the outside of the piping member; a guide pipe that is disposed apart from the gas guide portion and that is provided so as to cover the gas guide portion, The gas guide portion includes a gas guide slot formed continuously along the circumferential direction of the piping member.

2. a piping member for discharging exhaust gas from the fuel cell stack; a gas guide portion provided in the piping member and configured to guide a target gas contained in the exhaust gas to the outside of the piping member; a guide pipe that is disposed apart from the gas guide portion and that is provided so as to cover the gas guide portion, The gas guide portion includes a gas guide hole formed through the piping member.

3. a piping member for discharging exhaust gas from the fuel cell stack; a gas guide portion provided in the piping member and configured to guide a target gas contained in the exhaust gas to the outside of the piping member; a guide pipe disposed apart from the gas guide portion and the piping member and provided so as to cover the gas guide portion, The exhaust gas treatment device for a fuel cell, wherein the gas guide portion is provided at a distance from a distal end of the piping member.

4. a piping member for discharging exhaust gas from the fuel cell stack; a gas guide portion provided in the piping member and configured to guide a target gas contained in the exhaust gas to the outside of the piping member; a guide pipe that is disposed apart from the gas guide portion and that is provided so as to cover the gas guide portion, a mixing space communicating with the outside is defined between the gas guide portion and the guide pipe; In the mixing space, the target gas and external air are mixed, an exhaust gas treatment device for a fuel cell, wherein both ends of the mixing space along the longitudinal direction of the piping member communicate with the outside via the piping member and the guide piping;

5. The exhaust gas treatment device for a fuel cell according to claim 1 , wherein the gas guide portion is provided at a distance from a distal end of the piping member.

6. A piping member for discharging exhaust gas from the fuel cell stack; a gas guide portion provided in the piping member and configured to guide a target gas contained in the exhaust gas to the outside of the piping member; a guide pipe disposed apart from the gas guide portion and the piping member and provided so as to cover the gas guide portion, a mixing space communicating with the outside is defined between the gas guide portion and the guide pipe; In the mixing space, the target gas and external air are mixed.

7. The guide pipe includes a guide ring, The exhaust gas treatment device for a fuel cell according to claim 1 , wherein the guide ring is provided so as to entirely surround the periphery of the gas guide slot.

8. The piping member is A first pipe; a second pipe provided separately from the first pipe, The exhaust gas treatment device for a fuel cell according to claim 1 , wherein the gas guide slot is defined between the first pipe and the second pipe.

9. The first tubing is provided having a first diameter; The exhaust gas treatment device for a fuel cell according to claim 8 , wherein the second pipe is provided to have a second diameter different from the first diameter.

10. The exhaust gas treatment device for a fuel cell according to claim 8 , wherein the first pipe and the second pipe are provided to have the same diameter.

11. The exhaust gas treatment device for a fuel cell according to claim 8 , wherein the first pipe and the second pipe are arranged coaxially.

12. The exhaust gas treatment device for a fuel cell according to claim 8 , wherein the first pipe and the second pipe are arranged non-coaxially.

13. The exhaust gas treatment device for a fuel cell according to claim 8 , wherein the guide pipe is disposed at an angle with respect to the pipe member.

14. The guide pipe is a first guide pipe portion provided to surround the periphery of the first pipe and formed to have a diameter that gradually decreases from the first inlet toward the first outlet; 9. The exhaust gas treatment device of claim 8, further comprising: a second guide piping portion provided to surround the periphery of the second piping and formed to have a diameter that gradually expands from a second inlet connected to the first outlet toward the second outlet.

15. The exhaust gas treatment device for a fuel cell according to claim 2 , wherein the gas guide hole is formed in at least one of an upper portion and a lower portion of the piping member along a vertical direction.

16. The guide pipe includes a guide plate, The exhaust gas treatment device for a fuel cell according to claim 2 , wherein the guide plate is provided so as to cover the periphery of the gas guide hole.

17. The exhaust gas treatment device for a fuel cell according to claim 16, wherein the guide plate is provided linearly.

18. The exhaust gas treatment device for a fuel cell according to claim 16 , wherein the guide plate is provided in a curved shape.

19. 20. The exhaust gas treatment device for a fuel cell according to claim 18, wherein the guide plate includes ridges and valleys that are continuously connected to form a waveform.

20. The exhaust gas treatment device for a fuel cell according to claim 1 , wherein the target gas contains hydrogen (H 2 ).

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