Silencing device and power station

Abstract

The utility model provides a silencing device and a power station, the silencing device comprises a shell and a water separator, a main partition plate is arranged in the shell, so that a first flow channel, a communicating cavity, a second flow channel and a silencing cavity are formed in the shell; the water separator is arranged in the first flow channel; the first runner, the communicating cavity and the second runner are sequentially communicated, an inlet is formed in the end, away from the communicating cavity, of the first runner, and an outlet is formed in the end, away from the communicating cavity, of the second runner; the cross section area of the communicating cavity is larger than that of the first runner and that of the second runner; the silencing cavity is formed in the circumferential direction of the second flow channel and communicates with the second flow channel through a plurality of through holes. According to the silencing device, the silencing effect of the silencing device can be effectively improved, water in exhausted gas can be effectively separated, the drainage effect is improved, and therefore the use performance of the silencing device can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogen fuel cell systems, and particularly relates to a noise elimination device. The utility model also relates to a power station provided with the above-mentioned muffler. Background Art

[0002] A hydrogen fuel cell system is a device that generates electricity through the electrochemical reaction of hydrogen and oxygen. Since the power generation power of a single hydrogen fuel cell system is limited, a common hydrogen fuel cell stationary power station is a combination of multiple systems, with unified hydrogen supply. Each system's hydrogen pipeline is equipped with a proportional valve, and each system is equipped with a separate air pipeline and water pipeline. For the convenience of tail gas discharge management, the tail gas discharges of multiple hydrogen fuel cell systems are collected and discharged from a larger tail gas discharge port.

[0003] Since the stationary power station converges the exhaust gases of multiple systems, the noise and drainage volume at the converged tail gas discharge port are very large. Usually, a water separator is set on the exhaust pipeline. However, on the one hand, due to the limited separation ability of the water separator, and on the other hand, due to the large number of parallel systems and large drainage volume, a large amount of water vapor still discharges from the tail gas discharge port. Summary of the Utility Model

[0004] In view of this, the utility model aims to propose a noise elimination device to improve the noise elimination effect and drainage effect, thereby enhancing the use performance.

[0005] To achieve the above object, the technical solution of the utility model is realized as follows:

[0006] A noise elimination device includes a housing and a water separator;

[0007] A main partition is provided inside the housing, so that a first flow channel, a communication cavity, a second flow channel and a noise elimination cavity are formed inside the housing;

[0008] The water separator is arranged in the first flow channel;

[0009] The first flow channel, the communication cavity and the second flow channel are connected in sequence. An inlet is provided at one end of the first flow channel away from the communication cavity, and an outlet is provided at one end of the second flow channel away from the communication cavity; the cross-sectional area of the communication cavity is larger than that of the first flow channel, and the cross-sectional area of the communication cavity is larger than the cross-section of the second flow channel;

[0010] The noise elimination cavity is arranged in the circumferential direction of the second flow channel, and the noise elimination cavity and the second flow channel are connected through a plurality of through holes.

[0011] Further, a plurality of secondary partitions are provided in the sound-absorbing cavity. The plurality of secondary partitions are arranged at intervals in sequence along the flow direction of the fluid in the second flow channel, and the sound-absorbing cavity is divided into a plurality of sub-sound-absorbing cavities. Each of the sub-sound-absorbing cavities and the second flow channel are communicated through a plurality of through holes; the sum of the communication areas of the plurality of through holes corresponding to each of the sub-sound-absorbing cavities is different.

[0012] Further, the volumes of the sub-sound-absorbing cavities are different from each other.

[0013] Further, sound-absorbing materials are filled in each of the sub-sound-absorbing cavities.

[0014] Further, the housing includes a first pipe body with a circular cross-section. The main partition includes a first partition and a second partition located in the first pipe body; the first partition is formed by a second pipe body with a circular cross-section, the cross-section of the second partition is an annular shape, the inner circle of the second partition is connected to the second pipe body, and the outer circle of the second partition is connected to the first pipe body; the space inside the second pipe body forms the second flow channel, and the space between the first pipe body and the second pipe body forms the annular sound-absorbing cavity.

[0015] Further, a drain port communicated with the communication cavity is provided on the housing. The drain port is used to drain the water in the communication cavity, and the drain port and the inlet of the second flow channel are disposed on two opposite sides of the communication cavity.

[0016] Further, a first opening communicating adjacent sub-sound-absorbing cavities is provided on each of the secondary partitions; a second opening is provided on the second partition, and the second opening communicates the sub-sound-absorbing cavity on one side of the second partition with the communication cavity.

[0017] Further, a plurality of first reinforcing ribs are provided on the outer side of the peripheral wall of the first flow channel, and the plurality of first reinforcing ribs are arranged at intervals around the circumference of the first flow channel; and / or, a plurality of second reinforcing ribs are provided on the outer side of the peripheral wall of the second flow channel away from the communication cavity, and the plurality of second reinforcing ribs are arranged at intervals around the circumference of the second flow channel.

[0018] Further, the water separator adopts a cyclone separator. The cyclone separator includes a shaft body and a plurality of guide vanes. The plurality of guide vanes are arranged at intervals in the circumferential direction of the shaft body, and each of the guide vanes is connected between the shaft body and the housing.

[0019] Compared with the prior art, the present utility model has the following advantages:

[0020] When the noise elimination device described in the present utility model is applied to the tail exhaust noise elimination of a hydrogen fuel cell system, through the provided water separator, the water in the discharged gas can be effectively separated, and the water can be thrown to the side wall of the water separator, thereby reducing the possibility of water entering the communication cavity, the second flow channel and the noise elimination cavity. By setting the communication cavity connected between the first flow channel and the second flow channel, when the gas flows through this communication cavity, the water molecules can be thrown to the peripheral wall of the communication cavity, effectively preventing water from entering the second flow channel and the noise elimination cavity. The above process realizes two water separation processes, has a good water separation effect, so that in winter applications, it can also prevent water from entering the noise elimination cavity and affecting the noise elimination effect, and can also prevent water from freezing and expanding, which is beneficial to extending the service life of the noise elimination device; at the same time, the communication cavity can also play a certain role in noise elimination. By setting the noise elimination cavity in the circumferential direction of the second flow channel, the noise of the air flow entering the second flow channel can be effectively eliminated. Cooperating with the communication cavity, the noise elimination effect of this noise elimination device can be effectively improved.

[0021] In addition, by setting the secondary partition board, the noise elimination cavity can be divided into multiple sub-noise elimination cavities. The sum of the communication areas of the multiple through holes corresponding to each sub-noise elimination cavity is different, which is beneficial to eliminating noises of different frequencies and facilitating the improvement of the frequency range of the sounds eliminated by the noise elimination device. Setting the volumes of the respective noise elimination cavities to be different is beneficial to eliminating noises of different frequencies and facilitating the improvement of the frequency range of the sounds eliminated by the noise elimination device.

[0022] Secondly, filling sound-absorbing materials in each sub-noise elimination cavity is beneficial to improving the noise elimination effect of the noise elimination device. Setting the housing to include a first pipe body, and making the main partition board include a first partition board and a second partition board, and the first partition board is made of a second pipe body, has a simple structure and is convenient for processing, making the cross-section of the noise elimination cavity be in an annular shape, having a good noise elimination effect. The setting of the drain port is beneficial to discharging the accumulated water in the communication cavity, making the drain port and the inlet of the second flow channel be located on two opposite sides of the communication cavity, that is, making the flow direction of the discharged gas and the flow direction of the discharged water be opposite, so as to prevent the gas from being discharged from the drain pipe, ensuring that most of the gas flows out from the second flow channel, and thus being beneficial to ensuring that the noise elimination device plays a noise elimination role.

[0023] Furthermore, a first opening is provided on the secondary partition board, and a second opening is provided on the second partition board. When actually arranging the noise elimination device, a small amount of water in the air flow entering the second flow channel can enter the sub-noise elimination cavity through the through holes, so that the water in each sub-noise elimination cavity can be discharged through the first opening and the second opening, preventing water from accumulating in the sub-noise elimination cavity and ensuring the drainage capacity of the sub-noise elimination cavity. In cold winter weather, the noise elimination device will not be cracked and damaged due to accumulated water freezing, which is beneficial to extending the service life of the noise elimination device.

[0024] In addition, the multiple first reinforcing ribs provided are conducive to improving the structural strength of the peripheral wall of the first flow channel, and the multiple second reinforcing ribs provided are conducive to improving the structural strength of the peripheral wall of the second flow channel. The water separator is a cyclone separator, which has a good water separation effect. The guide vane is connected between the shaft body and the outer wall of the first flow channel, with a simple structure and convenient processing.

[0025] Another object of the present invention is to provide a power station, which includes a plurality of hydrogen fuel cell systems, and a total exhaust pipe for collecting the tail emissions of the plurality of hydrogen fuel cell systems together. The above-mentioned silencing device is provided on the total exhaust pipe.

[0026] For the power station of the present invention, by providing the above-mentioned silencing device on the total exhaust pipe, the good water separation effect and silencing effect of the above-mentioned silencing device can be utilized, which can not only solve the problem of high noise at the exhaust port of the power station, but also solve the problem of the influence of water vapor at the exhaust port on the silencing performance, as well as the problem of damage to the silencing device caused by the icing of water vapor. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings forming a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0028] Figure 1 is a schematic structural diagram of the silencing device according to the embodiment of the present invention from the first perspective;

[0029] Figure 2 is a schematic structural diagram of the silencing device according to the embodiment of the present invention from the second perspective;

[0030] Figure 3 is a cross-sectional view of the silencing device according to the embodiment of the present invention;

[0031] Figure 4 is Figure 3 an enlarged view of part A in

[0032] Figure 5 is Figure 3 an enlarged view of part B in

[0033] Figure 6 is a schematic structural diagram of the water separation according to the embodiment of the present invention;

[0034] Description of the reference numerals:

[0035] 1. Housing; 1a. First pipe body; 101. First flow channel; 102. Connecting cavity; 103. Second flow channel; 104. Muffling cavity; 1041. First sub - muffling cavity; 1042. Second sub - muffling cavity; 1043. Third sub - muffling cavity; 11. First reinforcing rib; 12. Second reinforcing rib; 13. Main partition; 131. First partition; 132. Second partition; 1321. Second opening; 14. Secondary partition; 141. First opening;

[0036] 2. Water separator; 201. Shaft body; 202. Guide vanes;

[0037] 3. Second pipe body; 301. Through - hole;

[0038] 10. Inlet; 20. Outlet; 100. Drainage port. Detailed implementation manners

[0039] It should be noted that, without conflict, the embodiments and features in the embodiments of the present utility model can be combined with each other.

[0040] In the description of the present utility model, it should be noted that if terms indicating orientation or positional relationship such as "upper", "lower", "inner", "outer", etc. appear, they are based on the orientation or positional relationship shown in the drawings, and are 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, and therefore should not be construed as a limitation to the present utility model. In addition, if terms such as "first", "second", etc. appear, they are also only for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0041] In addition, in the description of the present utility model, unless otherwise clearly defined, the terms "installation", "connection", "connection", "connecting piece" 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 directly connected or indirectly connected 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 in combination with specific situations.

[0042] The present utility model will be described in detail below with reference to the drawings and in combination with embodiments.

[0043] Embodiment 1

[0044] This embodiment relates to a muffling device, which can not only improve the muffling effect, but also effectively separate the water in the discharged gas, which is beneficial to improving the drainage effect, and thus can improve the use performance.

[0045] In terms of the overall structure, refer to Figures 1 to 3As shown in the figure, the muffling device of this embodiment includes a housing 1 and a water separator 2. Among them, a main partition 13 is provided inside the housing 1, so that a first flow channel 101, a communication cavity 102, a second flow channel 103 and a muffling cavity 104 are constructed inside the housing 1. The water separator 2 is arranged in the first flow channel 101, and the first flow channel 101, the communication cavity 102 and the second flow channel 103 are connected in sequence. An inlet 10 is provided at one end of the first flow channel 101 away from the communication cavity 102, and an outlet 20 is provided at one end of the second flow channel 103 away from the communication cavity 102. The cross-sectional area of the communication cavity 102 is larger than that of the first flow channel 101, and the cross-sectional area of the communication cavity 102 is larger than the cross-section of the second flow channel 103. The muffling cavity 104 is arranged in the circumferential direction of the second flow channel 103, and the muffling cavity 104 and the second flow channel 103 are connected through a plurality of through holes 301.

[0046] In the above structure, through the water separator 2 arranged in the first flow channel 101, when the muffling device is applied to the tail exhaust muffling of a stationary power station of a hydrogen fuel cell system, the water in the discharged gas can be effectively separated, and the water is thrown to the side wall of the water separator 2, thereby reducing the possibility of water entering the communication cavity 102, the second flow channel 103 and the muffling cavity 104. By arranging the communication cavity 102 between the first flow channel 101 and the second flow channel 103, when the gas flows through the communication cavity 102, the water molecules can be thrown to the peripheral wall of the communication cavity 102, effectively preventing water from entering the second flow channel 103 and the muffling cavity 104. The above process realizes two water separation processes, has a good water separation effect, so that in winter applications, water can also be prevented from entering the muffling cavity 104 and affecting the muffling effect, and water freezing and expansion can also be prevented, which is beneficial to extending the service life of the muffling device.

[0047] At the same time, the arranged communication cavity 102 can also play a certain muffling role. The muffling cavity 104 arranged in the circumferential direction of the second flow channel 103 can effectively eliminate the noise of the airflow entering the second flow channel 103. Moreover, the cooperation of the muffling cavity 104 and the communication cavity 102 can effectively improve the muffling effect of the muffling device.

[0048] Specifically, continue to refer to Figures 1 to 3 and in combination with Figures 4 to 6 As shown, as a preferred embodiment, in this embodiment, the housing 1 includes a first pipe body 1a with a circular cross-section, and the main partition 13 includes a first partition 131 and a second partition 132 located inside the first pipe body 1a. Among them, the first pipe body 1a includes a large-diameter section and a small-diameter section connected to each other, a first end plate connecting the large-diameter section and the small-diameter section, and a second end plate connected to the end of the large-diameter section opposite to the first end plate. The small-diameter section is arranged close to the inlet 10, and the first flow channel 101 is formed inside the small-diameter section. The water separator 2 is arranged in the first flow channel 101, that is, arranged inside the small-diameter section.

[0049] Inside the first pipe body 1a, there is also a second pipe body 3 arranged coaxially with a circular cross-section, and a second partition plate 132 connected between the first pipe body 1a and the second pipe body 3. Specifically, the second pipe body 3 constitutes the first partition plate 131. The cross-section of the second partition plate 132 is an annular shape. The inner circle of the second partition plate 132 is connected to the second pipe body 3, and the outer circle of the second partition plate 132 is connected to the first pipe body 1a. The space inside the second pipe body 3 forms the second flow channel 103. Preferably, the cross-sectional area of the second flow channel 103 is equal to the cross-sectional area of the first flow channel 101. In addition, one end of the second pipe body 3 away from the second partition plate 132 passes through the second end plate and extends outside the first pipe body 1a, and this end constitutes the outlet 20. Moreover, the space between the first pipe body 1a and the second pipe body 3 forms an annular sound-absorbing cavity 104.

[0050] The second partition plate 132 is spaced from one end of the small-diameter section away from the inlet 10, and a communication cavity 102 is formed between the small-diameter section and the second partition plate 132. In this way, the first flow channel 101, the communication cavity 102, and the second flow channel 103 are sequentially connected. By setting the housing 1 to include the first pipe body 1a, and making the main partition plate 13 include the first partition plate 131 and the second partition plate 132, and the first partition plate 131 adopting the tubular structure form of the second pipe body 3, the first flow channel 101, the communication cavity 102, the second flow channel 103, and the sound-absorbing cavity 104 are separated inside the housing 1. Its structure is simple, easy to process, and the cross-section of the sound-absorbing cavity 104 is annular, having a good sound-absorbing effect.

[0051] In addition, a plurality of through holes 301 are provided on the second pipe body 3, and the plurality of through holes 301 connect the second flow channel 103 and the sound-absorbing cavity 104. Among them, the shape of the through holes 301 can be set according to the sound-absorbing requirements, for example, it can be set as a round hole, a long strip hole, a rectangular hole, or other irregularly shaped holes, etc., or an annular groove, etc.

[0052] As a preferred implementation manner, in this embodiment, a plurality of secondary partition plates 14 are provided in the sound-absorbing cavity 104. The plurality of secondary partition plates 14 are arranged at intervals in sequence along the flow direction of the fluid in the second flow channel 103, and the sound-absorbing cavity 104 is separated into a plurality of sub-sound-absorbing cavities. Each sub-sound-absorbing cavity and the second flow channel 103 are connected through a plurality of through holes 301. Moreover, the sum of the communication areas of the plurality of through holes 301 corresponding to each sub-sound-absorbing cavity is different. The setting of the plurality of secondary partition plates 14 makes the sound-absorbing cavity 104 separated into a plurality of sub-sound-absorbing cavities, and the sum of the communication areas of the plurality of through holes 301 corresponding to each sub-sound-absorbing cavity is different, which is beneficial to eliminating noises of different frequencies and facilitating improving the frequency range of the sounds eliminated by the sound-absorbing device.

[0053] Such as Figure 3As shown, in this embodiment, a plurality of secondary partitions 14 are arranged at intervals in sequence along the axial direction of the second pipe body 3, and the plurality of secondary partitions 14 divide the sound absorption cavity 104 into a first sub-sound absorption cavity 1041, a second sub-sound absorption cavity 1042, and a third sub-sound absorption cavity 1043. The sum of the communication areas of the plurality of through holes 301 corresponding to the first sub-sound absorption cavity 1041, the second sub-sound absorption cavity 1042, and the third sub-sound absorption cavity 1043 are all different. In this way, it is beneficial to eliminate noises of different frequencies, and it is convenient to increase the frequency range of sound elimination.

[0054] In this embodiment, continue to refer to Figure 3 As shown, the volumes of the sub-sound absorption cavities are different from each other, that is, the volumes of the first sub-sound absorption cavity 1041, the second sub-sound absorption cavity 1042, and the third sub-sound absorption cavity 1043 are different from each other. Preferably, the volumes of the first sub-sound absorption cavity 1041, the second sub-sound absorption cavity 1042, and the third sub-sound absorption cavity 1043 are gradually increased in sequence. In this way, it is beneficial to better adapt to a larger sound frequency band.

[0055] Moreover, in this embodiment, the volume of the communication cavity 102 is smaller than the volume of the first sub-sound absorption cavity 1041. With such a design, the communication cavity 102 can eliminate the high-frequency band in the noise. And the cooperation between the communication cavity 102 and the plurality of sub-sound absorption cavities not only enables the sound absorption device to have a wide frequency band and high sound absorption ability, but also has a good water separation effect, and can effectively prevent the structure of the sound absorption device from being damaged due to the retention and icing of water vapor during winter application.

[0056] In addition, it should be noted that the number of secondary partitions 14 provided, that is, the number of sub-sound absorption cavities provided, can be designed accordingly according to actual needs. Moreover, the volumes of the sub-sound absorption cavities can also be adaptively adjusted according to actual needs. This embodiment does not limit this.

[0057] To further improve the sound absorption effect, in this embodiment, sound absorption materials are filled in each sub-sound absorption cavity. The setting of the sound absorption materials can make the frequency band of sound elimination wider. Among them, the filled sound absorption materials can adopt sound absorption cotton, such as hard cotton, PET fiber with waterproof function, or PU foam cotton, etc. It should be noted here that among the plurality of sub-sound absorption cavities, the sound absorption materials can be filled in only one or several of the sub-sound absorption cavities, and the filling of the sound absorption materials is specifically set according to actual needs.

[0058] To facilitate the drainage of water in the communication cavity 102, in this embodiment, continue to refer to Figure 3As shown, a drain port 100 communicating with the communication cavity 102 is provided on the housing 1, and the drain port 100 is used to drain the water in the communication cavity 102. Moreover, the drain port 100 and the inlet 10 of the second flow channel 103 are disposed on two opposite sides of the communication cavity 102, that is, the flow directions of the discharged gas and the discharged water are opposite, so as to prevent the gas from being discharged from the drain pipe, ensure that most of the gas flows out from the second flow channel 103, and thus is conducive to ensuring that the silencing device plays a silencing role.

[0059] During specific implementation, a drain pipe is provided on the plate body at one end of the housing 1 where the inlet 10 is provided. One end of the drain pipe penetrates through the housing 1 and communicates with the communication cavity 102, and the other end of the drain pipe constitutes the drain port 100. When the silencing device is applied to the main exhaust pipe of a stationary power station, it is connected to the drain port 100 of the stationary power station through a pipe connected to the drain port 100, so as to facilitate guiding the water to a specified position. Of course, it can be understood that the water can also be directly drained through the drain pipe.

[0060] See Figures 3 to 5 As shown, in this embodiment, a first opening 141 communicating adjacent sub-silencing cavities is provided on each partition plate 14. A second opening 1321 is also provided on the second partition plate 132, and the second opening 1321 communicates the sub-silencing cavity on one side of the second partition plate 132 with the communication cavity 102. In this way, the water in a small amount of the air flow entering the second flow channel 103 can enter the sub-silencing cavity through the through hole 301, and the water in each sub-silencing cavity can be discharged into the communication cavity 102 through the first opening 141 and the second opening 1321 respectively, and discharged through the drain port 100, thereby preventing water from accumulating in each sub-silencing cavity, ensuring the drainage capacity of the sub-silencing cavity, especially in cold winter weather, effectively preventing the silencing device from bursting and being damaged due to water accumulation and freezing, and thus being conducive to extending the service life of the silencing device.

[0061] It should be noted that through the precise design of the first opening 141 and the second opening 1321, the silencing performance can be ensured not to be affected, and problems such as the shift of the silencing frequency will not occur. Moreover, by slightly modifying the drain pipe, the first opening 141 and the second opening 1321, the modification amount is small, and all forms of installation requirements of the silencer can be realized, and the applicable range is wide. In addition, it should also be noted that the design of the positions of the first opening 141 and the second opening 1321 can be adaptively adjusted according to the longitudinal arrangement, transverse arrangement or inclined arrangement of the silencing device, so as to ensure the silencing performance while facilitating the drainage of water.

[0062] In addition, in this embodiment, a plurality of first reinforcing ribs 11 are provided on the outer side of the peripheral wall of the first flow channel 101. The plurality of first reinforcing ribs 11 are arranged at intervals in the circumferential direction of the first flow channel 101. That is, a plurality of first reinforcing ribs 11 are provided on the first end plate of the first pipe body 1a near the inlet 10, and the plurality of first reinforcing ribs 11 are arranged at intervals in the circumferential direction of the small-diameter section. The arrangement of the plurality of first reinforcing ribs 11 is beneficial to improving the structural strength of the peripheral wall of the first flow channel 101, that is, it is beneficial to improving the structural strength at the connection between the small-diameter section and the large-diameter section.

[0063] Moreover, in this embodiment, a plurality of second reinforcing ribs 12 are provided on the outer side of the peripheral wall of the second flow channel 103 at a position far from the communication cavity 102. The plurality of second reinforcing ribs 12 are arranged at intervals in the circumferential direction of the second flow channel 103. That is, a plurality of second reinforcing ribs 12 are provided on the second end plate. The arrangement of the plurality of second reinforcing ribs 12 is beneficial to improving the structural strength of the peripheral wall of the second flow channel 103, that is, it is beneficial to improving the structural strength at the connection between the second pipe body 3 and the first pipe body 1a.

[0064] It should be noted that in addition to providing a plurality of first reinforcing ribs 11 and a plurality of second reinforcing ribs 12, it is also possible to provide only a plurality of first reinforcing ribs 11, or only a plurality of second reinforcing ribs 12, which is also feasible.

[0065] Since there are many hydrogen fuel systems connected in parallel in a fixed power station, a water separation device is generally provided in the exhaust pipeline. However, on the one hand, the separation ability of the water separation device is limited, and on the other hand, due to the large number of parallel systems and the large drainage volume, a large amount of water vapor is still discharged from the tail exhaust port. For this reason, in this embodiment, at the inlet 10 of the muffler device, that is, a water separator 2 is provided in the first flow channel 101.

[0066] As a preferred embodiment, in combination with Figure 3 and Figure 6 as shown, the water separator 2 in this embodiment adopts a cyclone separator. The cyclone separator includes a shaft body 201 and a plurality of guide vanes 202. The plurality of guide vanes 202 are arranged at intervals in the circumferential direction of the shaft body 201, and each guide vane 202 is connected between the shaft body 201 and the housing 1. At this time, setting the water separator 2 to adopt a cyclone separator has a good effect of separating water, and the guide vanes 202 are connected between the shaft body 201 and the outer wall of the first flow channel 101, with a simple structure and convenient processing.

[0067] The noise silencing device with water separation function in this embodiment adopts a straight tube structure with multiple noise silencing chambers, which is more suitable for the slender installation space of a fixed power station in terms of structure. Moreover, this noise silencing device has broadband and high noise silencing capabilities. At the same time, from a design perspective, it reduces the influence of moisture on the noise silencing effect of the noise silencing chamber. It is not only fully functional and structurally compact, but also flexible in the installation method, not restricted by the installation environment, and can achieve vertical installation, horizontal installation, and inclined installation. At the same time, the noise silencing device in this embodiment has strong applicability. It is not limited to fixed power stations using hydrogen fuel cell systems. A single hydrogen fuel system can also be used, and it can also be used in other occasions with similar requirements.

[0068] Embodiment 2

[0069] This embodiment relates to a power station, which includes a plurality of hydrogen fuel cell systems and a main exhaust pipe that collects the tail exhausts of the plurality of hydrogen fuel cell systems together. The noise silencing device of Embodiment 1 is provided on the main exhaust pipe.

[0070] In the power station of this embodiment, by setting the noise silencing device of Embodiment 1 on the main exhaust pipe, the good water separation effect and noise silencing effect of this noise silencing device can be utilized. It can not only solve the problem of high noise at the exhaust port of the power station, but also solve the problem of the influence of water vapor on the noise silencing performance at the exhaust port, as well as the problem of damage to the noise silencing device caused by the freezing of water vapor.

[0071] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A muffler, characterized in that: It comprises a housing (1) and a water separator (2); A main partition plate (13) is provided in the shell (1), so that a first flow channel (101), a connecting cavity (102), a second flow channel (103) and a muffler cavity (104) are constructed in the shell (1); The water separator (2) is arranged in the first flow channel (101); The first flow channel (101), the connecting cavity (102) and the second flow channel (103) are connected in sequence; an inlet (10) is provided at one end of the first flow channel (101) away from the connecting cavity (102), and an outlet (20) is provided at one end of the second flow channel (103) away from the connecting cavity (102); the cross-sectional area of ​​the connecting cavity (102) is larger than the cross-sectional area of ​​the first flow channel (101), and the cross-sectional area of ​​the connecting cavity (102) is larger than the cross-sectional area of ​​the second flow channel (103); The muffler chamber (104) is arranged in the circumferential direction of the second flow channel (103), and the muffler chamber (104) and the second flow channel (103) are connected via a plurality of through holes (301).

2. The muffler device according to claim 1, characterized in that: A plurality of sub-partition plates (14) are arranged in the muffler chamber (104) at intervals along the flow direction of the fluid in the second flow channel (103), so as to divide the muffler chamber (104) into a plurality of sub-muffler chambers, and each of the sub-muffler chambers is connected to the second flow channel (103) via a plurality of through holes (301); The sums of the communication areas of the plurality of through holes (301) corresponding to the sub-muffler cavities are different.

3. The muffler device according to claim 2, characterized in that: The volumes of the sub-muffler cavities are different.

4. The muffler device according to claim 3, characterized in that: Each of the sub-muffler cavities is filled with muffler material.

5. The muffler device according to claim 2, characterized in that: The shell (1) comprises a first tube body (1a) with a circular cross section, and the main partition (13) comprises a first partition (131) and a second partition (132) located in the first tube body (1a); The first partition (131) is composed of a second tube body (3) with a circular cross section, the second partition (132) has a circular cross section, the inner circle of the second partition (132) is connected to the second tube body (3), and the outer circle of the second partition (132) is connected to the first tube body (1a); The space inside the second tube body (3) forms the second flow channel (103), and the space between the first tube body (1a) and the second tube body (3) forms the annular muffler cavity (104).

6. The muffler device according to claim 5, characterized in that: The housing (1) is provided with a drain port (100) which is in communication with the communication cavity (102); the drain port (100) is used to discharge water in the communication cavity (102); and the drain port (100) and the inlet (10) of the second flow channel (103) are disposed on two opposite sides of the communication cavity (102).

7. The muffler device according to claim 6, characterized in that: Each of the secondary partition plates (14) is provided with a first opening (141) communicating with adjacent sub-muffler cavities; The second partition plate (132) is provided with a second opening (1321), and the second opening (1321) connects the sub-muffler cavity on one side of the second partition plate (132) with the connecting cavity (102).

8. The muffler device according to claim 5, characterized in that: A plurality of first reinforcing ribs (11) are provided on the outer side of the peripheral wall of the first flow channel (101), and the plurality of first reinforcing ribs (11) are arranged at circumferential intervals around the first flow channel (101); and / or, A plurality of second reinforcing ribs (12) are provided on the outer side of the peripheral wall of the second flow channel (103) at a position away from the connecting cavity (102), and the plurality of second reinforcing ribs (12) are arranged at circumferential intervals around the second flow channel (103).

9. The muffler according to any one of claims 1 to 8, characterized in that: The water separator (2) is a cyclone separator, comprising a shaft (201) and a plurality of guide blades (202), wherein the plurality of guide blades (202) are arranged at circumferential intervals on the shaft (201), and each of the guide blades (202) is connected between the shaft (201) and the housing (1).

10. A power station, characterized in that: The invention comprises a plurality of hydrogen fuel cell systems and a general exhaust pipeline which collects the tail exhausts of the plurality of hydrogen fuel cell systems together, wherein the general exhaust pipeline is provided with a silencer device as claimed in any one of claims 1 to 9.

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