Silencing device integrated with water separation structure

Abstract

The utility model relates to a silencing device integrated with a water separation structure, which is used for carrying out water separation and noise reduction on tail gas of a fuel cell discharge system and comprises a water separation module and a silencing module, the water separation module comprises a first-stage separation assembly and a second-stage separation assembly, and fuel cell tail gas is subjected to secondary water-gas separation through the first-stage separation assembly and the second-stage separation assembly and then is input into the noise elimination module; the noise elimination module comprises a noise elimination shell connected with the first-stage separation assembly in an assembled mode, a first center pipe and a second center pipe, wherein the first center pipe and the second center pipe are arranged in the noise elimination shell. The first center pipe is sleeved with noise reduction cotton, and noise reduction holes are formed in the second center pipe. Drain holes for separated liquid to flow out are formed in the shell of the first-stage separation assembly and the silencing shell. Compared with the prior art, the silencing device disclosed by the utility model can be used for carrying out water separation and noise reduction on tail gas of a fuel cell discharge system, so that silencing treatment is completed while water separation is carried out.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel cells, in particular to a silencing device integrated with a water separation structure. Background Art

[0002] With the development of the automotive industry, fuel cell vehicles have become the main development direction of the automotive industry. In a fuel cell, the exhaust gas generated after the reaction of hydrogen and oxygen contains a large amount of moisture. If this moisture cannot be discharged in time, it will affect the performance of the fuel cell stack. During the operation of the fuel cell stack, noise will be generated, and this noise radiates outward along the intake and exhaust air paths of the fuel cell stack, affecting the environmental noise. Therefore, it is necessary to take appropriate noise reduction measures. According to the characteristics of the exhaust noise spectrum of the fuel cell stack, a silencer needs to use sound-absorbing cotton, and the performance of the sound-absorbing cotton will be reduced in a humid environment. Therefore, it is also required to separate the excess moisture in the tail exhaust medium of the fuel cell stack.

[0003] At present, the drainage mechanisms of fuel cell exhaust systems generally have the following several methods: one is to adopt a siphon structure. However, the siphon requires a large pressure difference to achieve the drainage effect. Therefore, under the condition of low operating speed of vehicles running in the city, the simple siphon design will fail, resulting in water accumulation in the exhaust pipe; the second is to punch holes at the lowest point of the exhaust system to drain the condensate. Although the drainage capacity is strong, when the vehicle is idling, the condensate will also be discharged, which will cause water accumulation on the ground where the vehicle is parked; the third is to drain water using the Venturi tube principle, but this structure will increase the exhaust back pressure of the exhaust system and affect the performance of the fuel cell stack. CN116154223A discloses a hydrogen fuel cell exhaust system and an automobile, in which the exhaust system includes an exhaust pipe provided with a silencer, and a gas-water separation structure is provided upstream of the silencer in the exhaust pipe. In the above exhaust system, an independent silencing device and a gas-water separation structure are provided, which are far apart and occupy a large space, and cannot ingeniously integrate the functions of sound absorption and water separation.

[0004] Therefore, for fuel cell exhaust systems, there is still a need to develop a silencing device integrated with a water separation structure to meet the dual requirements of drainage and noise reduction. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a silencing device integrated with a water separation structure to meet the dual requirements of drainage and noise reduction of fuel cell exhaust systems.

[0006] The purpose of the utility model can be achieved by the following technical solutions:

[0007] A silencing device integrated with a water separation structure is used for water separation and noise reduction of the tail gas of a fuel cell emission system, and includes a water separation module and a silencing module arranged in sequence along the flowing direction of the fuel cell tail gas;

[0008] The water separation module includes a primary separation component and a secondary separation component through which the fuel cell tail gas flows in sequence;

[0009] The muffling module includes a muffling housing assembled and connected to the primary separation component, a first central tube and a second central tube disposed in the muffling housing. Both ends of the first central tube are communicated with the secondary separation component and the second central tube respectively; A sound-absorbing cotton is sleeved outside the first central tube, and sound-absorbing holes are formed on the second central tube;

[0010] Drainage holes for the separated liquid to flow out are formed on the housing of the primary separation component and the muffling housing.

[0011] Further, an air inlet for the tail gas to enter is provided on the primary separation component.

[0012] Further, the primary separation component includes a spiral blade structure for centrifugally separating liquid.

[0013] Further, a water storage cavity is provided inside the housing of the primary separation component, and the water storage cavity is communicated with a first drain hole formed on the housing.

[0014] Further, the secondary separation component is a hollow columnar structure, and one end of the hollow columnar structure close to the muffling module is an expansion section with a gradually increasing diameter.

[0015] Further, a plurality of hollow openings are formed on the tube wall of the first central tube.

[0016] Further, support plates are sleeved outside the first central tube, outside the second central tube and outside the connection part between the two.

[0017] Furthermore, the inner diameters of the support plates and the muffling housing at the corresponding positions are adapted to each other, playing a role in supporting the first central tube and the second central tube to enhance the installation stability of the first central tube and the second central tube.

[0018] Further, the support plate on the first central tube divides the first central tube into two sections, and sound-absorbing cotton is sleeved on both sections of the central tube.

[0019] Further, leakage holes are formed on the support plates.

[0020] Further, the muffling housing includes a main housing disposed outside the first central tube and a tail housing disposed outside the second central tube, and the main housing is assembled and connected to the tail housing.

[0021] Further, an air outlet for the tail gas output after water separation is formed on the tail housing, and the air outlet is communicated with the second central tube.

[0022] Furthermore, a second drainage hole is provided on the tail shell, and the liquid separated again by the silencer module is collected into the second drainage hole through the arc-shaped leakage hole on the support plate and flows out.

[0023] In the utility model, the specific discharge path of the separated liquid is as follows: the tail gas with high water content of the fuel cell is input into the first separation component, and the water vapor is centrifugally separated after passing through the spiral blade structure of the first separation component, and part of the water vapor forms droplets attached to the inner wall of the first separation component; then the expansion section of the second separation component can reduce the air flow velocity for re-separation. Most of the liquid after water separation by the first separation component and the second separation component can be collected in the water storage cavity in the shell of the first separation component, and then discharged through the first drainage hole on the shell of the first separation component. The gas after passing through the water separation module will also absorb part of the water after passing through the sound-absorbing cotton of the silencer module. The remaining liquid leaks out through the arc-shaped water leakage hole on the support plate, and then collects in the cavity of the tail shell, and is discharged from the second drainage hole opened on the tail shell, thereby realizing the full water separation in the silencer device of the utility model.

[0024] Compared with the prior art, the utility model has the following beneficial effects:

[0025] (1) The fuel cell exhaust gas of the utility model can effectively discharge the separated liquid after passing through the integrated water separation module and the silencer module, and the noise generated during the exhaust gas discharge of the fuel cell can be mostly absorbed after passing through the silencer module, thereby completing the silencer treatment while completing the water separation.

[0026] (2) The silencer of the utility model directly assembles the water separation module and the silencer module together, ingeniously integrating the water separation and noise reduction functions in one silencer. The structure is sophisticated, and the water separation process can continue from the entry of exhaust gas to the discharge of exhaust gas without occupying other space.

[0027] (3) The water separation module of the utility model is provided with a primary separation component and a secondary separation component, which realizes the water separation of the tail gas by combining a blade structure and an expansion section, thereby improving the water-gas separation efficiency.

[0028] (4) The noise reduction capability of the noise reduction module of the utility model can be greatly enhanced by using the noise reduction cotton and the noise reduction holes in combination.

[0029] (5) The utility model forms a multi-cavity structure by arranging partitions in the cavity of the muffler shell, which not only improves the installation stability of the central tube, but also further improves the noise reduction capability. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 The figure is a schematic diagram of an explosion of the silencer device of the utility model.

[0031] Figure 2 The sectional view after the assembly of the noise elimination device of the present utility model.

[0032] Figure 3 The structural schematic diagram of the water separation module of Embodiment 2 of the present utility model.

[0033] Figure 4 The structural schematic diagram of the first central tube of Embodiment 3 of the present utility model.

[0034] Figure 5 The structural schematic diagram of the tail housing of Embodiment 5 of the present utility model.

[0035] Explanation of the marks in the figure:

[0036] 1 - water separation module, 11 - primary separation component, 111 - spiral blade structure, 112 - water storage cavity, 113 - first drain hole, 12 - secondary separation component, 121 - expansion section;

[0037] 2 - noise elimination module, 21 - first central tube, 211 - opening, 22 - second central tube, 221 - sound absorption hole, 23 - noise elimination housing, 231 - main housing, 232 - tail housing, 233 - second drain hole, 24 - sound absorption cotton, 25 - support plate, 251 - water leakage hole. Specific embodiments

[0038] The present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments. This embodiment is implemented on the premise of the technical solution of the present utility model, and the detailed implementation manners and specific operation processes are given, but the protection scope of the present utility model is not limited to the following embodiments.

[0039] In the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model 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, so it cannot be understood as a limitation to the present utility model; the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance; in addition, unless otherwise clearly specified and defined, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0040] It should be noted that like reference numerals and letters refer to like items in the following figures. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0041] Embodiment 1:

[0042] A noise silencing device with an integrated water separation structure is used for water separation and noise reduction of the exhaust gas of a fuel cell emission system. It includes a water separation module 1 and a noise silencing module 2 arranged in sequence along the flow direction of the fuel cell exhaust gas.

[0043] As Figure 1-2 shown, the water separation module 1 of this embodiment includes a primary separation component 11 and a secondary separation component 12 through which the fuel cell exhaust gas flows in sequence. After the secondary water-gas separation by the primary separation component 11 and the secondary separation component 12, the fuel cell exhaust gas is input into the noise silencing module 2.

[0044] The noise silencing module 2 includes a noise silencing housing 23 assembled and connected to the primary separation component 11, a first central tube 21 and a second central tube 22 arranged in the noise silencing housing 21. Both ends of the first central tube 21 are communicated with the secondary separation component 13 and the second central tube 22 respectively. In order to give full play to the noise silencing function of the noise silencing module 2, a sound-absorbing cotton 24 is sleeved outside the first central tube 21, and sound-absorbing holes 221 are opened on the second central tube 22.

[0045] In this embodiment, drain holes for the separated liquid to flow out are opened on both the housing of the primary separation component 11 and the noise silencing housing 21, so that the liquid separated after the fuel cell exhaust gas passes through the water separation module 1 and the noise silencing module 2 can flow out along the drain holes. At the same time, the noise generated during the fuel cell exhaust gas emission process can be partially absorbed by the sound-absorbing cotton 24, and the noise energy is further reduced after entering the sound-absorbing holes 221 on the second central tube 22, thus completing the noise silencing treatment.

[0046] Embodiment 2:

[0047] A noise silencing device with an integrated water separation structure is used for water separation and noise reduction of the exhaust gas of a fuel cell emission system. It includes a water separation module 1 and a noise silencing module 2 arranged in sequence along the flow direction of the fuel cell exhaust gas. The water separation module 1 includes a primary separation component 11 and a secondary separation component 12 connected to the primary separation component 11. After the secondary water-gas separation by the primary separation component 11 and the secondary separation component 12, the fuel cell exhaust gas is input into the noise silencing module 2.

[0048] As Figure 3As shown in the figure, the primary separation component 11 of this embodiment includes a spiral blade structure 111 for centrifugally separating liquids. An air inlet for tail gas input is provided on the housing of the primary separation component 11. After the tail gas of the fuel cell with high water content is input into the primary separation component 11, the spiral blade structure 111 can separate water and gas by generating centrifugal force, and part of the water and gas forms droplets attached to the inner wall of the primary separation component 11.

[0049] The secondary separation component 12 of this embodiment is a hollow columnar structure. One end of the hollow columnar structure close to the muffler module 2 is an expansion section 121 with a gradually increasing diameter, and the air flow velocity can be decreased through the expansion section 121 for re-separation. A water storage cavity 112 is provided in the housing of the primary separation component 11. The water storage cavity 112 is communicated with a first drain hole 113 opened on the housing. Most of the liquid separated by the water separation module 1 is collected in the water storage cavity 112 and discharged through the first drain hole 113.

[0050] Embodiment 3:

[0051] A muffler device integrated with a water separation structure is used for water separation and noise reduction of the tail gas of a fuel cell emission system, and includes a water separation module 1 and a muffler module 2 arranged in sequence along the flow direction of the fuel cell tail gas. The muffler module 2 includes a muffler housing 23 assembled and connected with the primary separation component 11, a first central tube 21 and a second central tube 22 arranged in the muffler housing 21. Both ends of the first central tube 21 are communicated with the secondary separation component 13 and the second central tube 22 respectively. A sound-absorbing cotton 24 is sleeved outside the first central tube 21, and sound-absorbing holes 221 are opened on the second central tube 22. The muffler housing 23 of this embodiment is connected with the housing of the primary separation component 11 by bolts or welding.

[0052] The first central tube 21 of this embodiment is a hollow columnar structure, and a plurality of hollow openings 211 are opened on the tube wall of the first central tube 21. As Figure 4 shown, square openings 211 are circumferentially opened on the tube wall of the first central tube 21 of this embodiment and multiple groups are arranged along the axial direction. During the emission of the tail gas of the fuel cell with high water content, working noise will be accompanied. After the noise passes through the water separation module 1, it enters the sound-absorbing cotton 24 through the square openings 211 of the first central tube 21 and is partially muffled.

[0053] Embodiment 4:

[0054] A noise silencer device integrated with a water separation structure is used for water separation and noise reduction of the tail gas of a fuel cell emission system, and includes a water separation module 1 and a noise silencer module 2 arranged in sequence along the flowing direction of the fuel cell tail gas. The noise silencer module 2 includes a noise silencer housing 23 assembled and connected with a primary separation component 11, and a first central tube 21 and a second central tube 22 arranged in the noise silencer housing 21. Two ends of the first central tube 21 are respectively communicated with a secondary separation component 13 and the second central tube 22. A sound-absorbing cotton 24 is sleeved outside the first central tube 21, and sound-absorbing holes 221 are formed in the second central tube 22.

[0055] In this embodiment, support plates 25 are sleeved outside the first central tube 21, outside the second central tube 22, and outside the connection part between the two. The support plates 25 can divide the space inside the noise silencer housing 23 into multiple parts. The inner diameters of the support plates 25 and the noise silencer housing 23 at the corresponding positions are adapted to each other, and the support plates 25 can also play a role in supporting the first central tube 21 and the second central tube 22 to enhance the installation stability of the first central tube 21 and the second central tube 22.

[0056] In this embodiment, the support plate 25 on the first central tube 21 divides the first central tube 21 into two sections, and sound-absorbing cotton 24 is sleeved on both sections of the central tube. The tail gas passing through the sound-absorbing cotton 24 twice continuously can further improve the water separation effect and the noise reduction effect.

[0057] Embodiment 5:

[0058] A noise silencer device integrated with a water separation structure is used for water separation and noise reduction of the tail gas of a fuel cell emission system, and includes a water separation module 1 and a noise silencer module 2 arranged in sequence along the flowing direction of the fuel cell tail gas. The difference from Embodiment 4 is that arc-shaped water leakage holes 251 are formed in the support plates 25 in this embodiment.

[0059] As Figure 5 shown, the noise silencer housing 23 in this embodiment includes a main housing 231 arranged outside the first central tube 21 and a tail housing 232 arranged outside the second central tube 22. The main housing 231 and the tail housing 232 are assembled by bolt connection or welding, and a second drain hole 233 is formed in the tail housing 232. An air outlet for outputting the tail gas after water separation is also formed in the tail housing 232, and the air outlet is communicated with the second central tube 22. In this embodiment, the liquid separated again by the noise silencer module 2 is collected through the arc-shaped water leakage holes 251 on the support plate 25 and flows out through the second drain hole 233.

[0060] The specific liquid flow route in this embodiment is as Figure 2As shown. After the tail gas with high water content in the fuel cell enters the first separation component 11, the water vapor is centrifugally separated by the spiral blade structure 111 of the first separation component 11, and part of the water vapor forms droplets attached to the inner wall of the first separation component 11; then, the expansion section 121 of the second separation component 12 can reduce the air flow velocity for re-separation. Most of the liquid separated by water through the first separation component 11 and the second separation component 12 can be collected in the water storage cavity 112 in the housing of the first separation component 11, and then discharged through the first drain hole 113 on the housing of the first separation component 11.

[0061] The gas passing through the water separation module 1 will also absorb some moisture after passing through the sound-absorbing cotton of the sound silencing module 2. The remaining liquid leaks out through the arc-shaped water leakage holes 251 on the support plate 25, and then is collected in the cavity of the tail housing 232 and discharged from the second drain hole 233 opened on the tail housing 232, thereby realizing the whole-process water separation in the sound silencing device of this embodiment.

[0062] The above description of the embodiments is to enable those of ordinary skill in the art to understand and use the utility model. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative efforts. Therefore, the present utility model is not limited to the above embodiments, and the improvements and modifications made by those skilled in the art without departing from the scope of the present utility model according to the disclosure of the present utility model should be within the protection scope of the present utility model.

Claims

1. A silencer with integrated water separation structure, used for water separation and noise reduction of tail gas from a fuel cell exhaust system, characterized in that: It comprises a water separation module (1) and a noise elimination module (2) which are arranged in sequence along the flow direction of the fuel cell tail gas; The water separation module (1) comprises a primary separation component (11) and a secondary separation component (12) through which the fuel cell tail gas flows in sequence; The muffler module (2) comprises a muffler housing (23) assembled and connected to the primary separation component (11), and a first central tube (21) and a second central tube (22) arranged in the muffler housing (23); the two ends of the first central tube (21) are respectively connected to the secondary separation component (12) and the second central tube (22); the first central tube (21) is provided with a muffler cotton (24) on its outer cover, and the second central tube (22) is provided with a muffler hole (221); The shell of the primary separation component (11) and the muffler shell (23) are both provided with drainage holes for the separated liquid to flow out.

2. A muffler device with integrated water separation structure according to claim 1, characterized in that: The primary separation component (11) comprises a spiral blade structure (111) for centrifugally separating liquid.

3. The muffler device with integrated water separation structure according to claim 1, characterized in that: A water storage chamber (112) is provided in the shell of the primary separation component (11), and the water storage chamber (112) is communicated with a first drainage hole (113) provided on the shell.

4. The muffler device with integrated water separation structure according to claim 1, characterized in that: The secondary separation component (12) is a hollow columnar structure, and one end of the hollow columnar structure close to the silencer module (2) is an expansion section (121) with a gradually increasing diameter.

5. The muffler device with integrated water separation structure according to claim 1, characterized in that: A plurality of hollow openings (211) are provided on the wall of the first central tube (21).

6. The muffler device with integrated water separation structure according to claim 1, characterized in that: A support plate (25) is sleeved on the outside of the first central tube (21), the outside of the second central tube (22), and the outside of the connection between the two; The support plate (25) is adapted to the inner diameter of the sound-absorbing shell (23) at the corresponding position.

7. A muffler device with integrated water separation structure according to claim 6, characterized in that: The support plate (25) on the first central tube (21) divides the first central tube (21) into two sections, and both sections of the central tube are sleeved with sound-absorbing cotton (24).

8. The muffler device with integrated water separation structure according to claim 6, characterized in that: The support plates (25) are each provided with a water leakage hole (251).

9. The muffler device with integrated water separation structure according to claim 1, characterized in that: The muffler shell (23) comprises a main shell (231) arranged outside the first central tube (21) and a tail shell (232) arranged outside the second central tube (22), and the main shell (231) and the tail shell (232) are assembled and connected; The tail shell (232) is also provided with an outlet for exhaust gas output, and the outlet is connected to the second central pipe (22).

10. A muffler device with integrated water separation structure according to claim 9, characterized in that: The tail shell (232) is provided with a second drainage hole (233).

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