Tail water steam separation silencer of hydrogen fuel cell system

Abstract

The utility model discloses a tail water steam separation silencer of a hydrogen fuel cell system. A front end cover and a rear end cover are respectively arranged at two ends of a barrel body of the silencer; the air inlet pipe penetrates through the front end cover to enter the cylinder, and the air outlet pipe penetrates through the rear end cover to enter the cylinder; a drainage pipe is arranged on the cylinder body; and a centrifugal water vapor separation device and a silencing device are arranged in the cylinder body. Water vapor in tail gas is condensed into liquid water in advance, rime fog is prevented from appearing at an outlet of the tail pipe, and the problem that tail exhaust noise is too large is solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to hydrogen fuel cell engine technical field, and particularly relates to a hydrogen fuel cell system tail exhaust water vapor separation silencer. BACKGROUND

[0002] The working principle of the hydrogen fuel cell system is that hydrogen is sent to the anode plate (negative electrode) of the fuel cell, and under the action of a catalyst (platinum), one electron in the hydrogen atom is separated, the hydrogen ion (proton) loses the electron and passes through a proton exchange membrane to reach the cathode plate (positive electrode) of the fuel cell, and the electron cannot pass through the proton exchange membrane and can only reach the cathode plate through an external circuit, thereby generating an electric current in the external circuit. After the electron reaches the cathode plate, the electron, oxygen atoms and hydrogen ions recombine into water. Since the oxygen supplied to the cathode plate can be obtained from air, as long as hydrogen is continuously supplied to the anode plate and air is continuously supplied to the cathode plate, and water (vapor) is removed in time, electric energy can be continuously provided. Compared with traditional power, the energy conversion efficiency of the fuel cell vehicle is as high as 60-80%, which is 2-3 times that of the internal combustion engine. The fuel of the fuel cell is hydrogen and oxygen, and the product is clean water. It does not produce carbon monoxide and carbon dioxide, and no sulfur and particulates are discharged. Therefore, the hydrogen fuel cell system is a zero-emission and zero-pollution power. However, under the working state of the hydrogen fuel cell system, a large amount of water vapor is contained in the tail gas. In cold winter, the water vapor discharged from the tail pipe is in mist form, which has a certain influence on the image of the vehicle and the vehicle behind the vehicle; and the water vapor cannot be removed in time, which will freeze in the silencer and has a certain influence on the reliability of the system. SUMMARY

[0003] The utility model provides a kind of hydrogen fuel cell system tail exhaust water vapor separation silencer, and its purpose is to solve the defects of prior art, make the water vapor in tail gas condense into liquid water state in advance to avoid white mist at tail pipe outlet, solve the problem of excessive tail exhaust noise, and can keep lower exhaust back pressure, avoid excessive power loss of hydrogen fuel cell system.

[0004] The utility model solves the technical problem of the scheme in that:

[0005] A kind of hydrogen fuel cell system tail exhaust water vapor separation silencer, characterized in that:

[0006] The two ends of the cylinder body are respectively provided with a front end cover and a rear end cover;An air inlet pipe passes through the front end cover and enters the cylinder body, and an air outlet pipe passes through the rear end cover and enters the cylinder body;A drain pipe is arranged on the cylinder body;

[0007] A centrifugal water vapor separation device and a silencing device are installed in the cylinder body;

[0008] The main body of the centrifugal water vapor separation device is a cyclone cylinder, a front partition plate is installed at the front end of the cyclone cylinder, and a rear partition plate is installed at the rear end of the cyclone cylinder;

[0009] The diameters of the front and rear partitions are greater than the diameter of the cyclone cylinder, and the front and rear partitions are fixed to the inner wall of the cyclone cylinder;

[0010] The front partition is provided with a plurality of front partition mesh holes in the portion greater than the outer diameter of the cyclone cylinder;

[0011] The rear partition has a shaft hole;

[0012] The front cylinder wall of the cyclone cylinder is provided with a plurality of cyclone cylinder mesh holes, and the rear part of the inner cavity of the cyclone cylinder is filled with a stainless steel winding mesh;

[0013] The outer wall of the cyclone cylinder is fixed with a cyclone plate, the front end of the cyclone plate is fixed on the front partition, the rear end of the cyclone plate is fixed on the rear partition, the bottom end of the cyclone plate is fixed on the outer wall of the cyclone cylinder, and the cyclone plate and the outer wall of the cyclone cylinder form an included angle less than 90 degrees.

[0014] The stainless steel winding mesh is woven into a wave-peak, wave-valley shape by a cylindrical stainless steel wire, and is wound layer by layer.

[0015] The main body of the sound attenuation device is a sound attenuation cylinder with an arc-shaped cross section, and a plurality of sound attenuation cylinder mesh holes are formed in the sound attenuation cylinder;

[0016] The front end of the sound attenuation cylinder is provided with a front plate, and the rear end of the sound attenuation cylinder is provided with a rear plate, and the front plate and the rear plate are respectively provided with a shaft hole in communication with the inner cavity of the sound attenuation cylinder;

[0017] The diameters of the front and rear plates are greater than the diameter of the sound attenuation cylinder, and the front and rear plates are fixed to the inner wall of the sound attenuation cylinder;

[0018] The outer wall of the sound attenuation cylinder is fixed with a baffle, the front end of the baffle is fixed on the front plate, the rear end of the baffle is fixed on the rear plate, and the bottom end of the baffle is fixed on the outer wall of the sound attenuation cylinder, and the baffle and the outer wall of the sound attenuation cylinder form an included angle less than 90 degrees.

[0019] A plurality of parallel sound attenuation sheets are installed in the inner cavity of the sound attenuation cylinder, and a plurality of sound attenuation holes are formed in each sound attenuation sheet.

[0020] Each sound attenuation sheet has an arc-shaped notch. Advantages

[0021] 1. The centrifugal water-vapor separation device can form a cyclone with tail gas, and water vapor is thrown to the inner wall of the cylinder after centrifugal action to form liquid water which is then discharged after settling;

[0022] 2. Water vapor that has not yet formed liquid water after the action of centrifugal force is further settled after passing through the stainless steel winding mesh assembly (the specific surface area of the stainless steel winding mesh is large);

[0023] 3. It has a wide sound attenuation spectrum, and the sound attenuation effect is good for high-frequency noise of 1000Hz-10000Hz. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 Figure 1 is a schematic diagram of the internal structure of a water vapor separation muffler;

[0025] Figure 2 Figure 2 is a centrifugal water vapor separation device viewed from the air inlet end;

[0026] Figure 3 Figure 3 is a centrifugal water vapor separation device viewed from the air outlet end;

[0027] Figure 4 Figure 4 is a diagram of the internal airflow direction of a centrifugal water vapor separation device;

[0028] Figure 5 Figure 5 is a structure diagram of a stainless steel winding net;

[0029] Figure 6 Figure 6 is a schematic diagram of a muffling device. DETAILED DESCRIPTION

[0030] The utility model will be described further below in combination with the drawings and specific embodiments.

[0031] In order to make the technical scheme of the utility model clearer, the drawings needed to be used in the description will be simply introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and other embodiments can be obtained according of these drawings without creative labor for those skilled in the art. In order to facilitate the understanding of the utility model, the utility model will be described in more detail below in combination with the drawings and specific embodiments.

[0032] As shown in Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 :

[0033] The utility model provides a hydrogen fuel cell system tail exhaust water vapor separation muffler.

[0034] As shown in Figure 1 :

[0035] The water vapor separation muffler in the utility model includes centrifugal water vapor separation device 4 and muffling device 10, and front end cover 21 and rear end cover 22 are installed at both ends of cylinder body 6 respectively. Cylinder body 6 is provided with drain pipe 9.

[0036] Air inlet pipe 1 passes through front end cover 21 and enters cylinder body 6, and air outlet pipe 8 passes through rear end cover 22 and enters cylinder body 6.

[0037] The front part in cylinder body 6 is installed with, as shown in Figure 2 , Figure 3The centrifugal water vapor separation device 4 shown is provided with a rear part Figure 6 The muffling device 10 shown.

[0038] As shown in Figure 2 , Figure 3 shown:

[0039] The main body of the centrifugal water vapor separation device 4 is a cyclone cylinder 41, the front end of the cyclone cylinder 41 is provided with a front partition plate 3, and the rear end of the cyclone cylinder 41 is provided with a rear partition plate 5.

[0040] The diameters of the front partition plate 3 and the rear partition plate 5 are greater than the diameter of the cyclone cylinder 41, and the front partition plate 3 and the rear partition plate 5 are fixed to the inner wall of the cyclone cylinder 41.

[0041] The front partition plate 3 is provided with a plurality of front partition plate mesh holes 30 at a portion greater than the outer diameter of the cyclone cylinder 41, that is, the front partition plate mesh holes 30 correspond to the outside of the cyclone cylinder 41.

[0042] The rear partition plate 5 has a shaft hole.

[0043] The front part of the cyclone cylinder 41 is provided with a plurality of cyclone cylinder mesh holes 40, and the rear part of the inner cavity of the cyclone cylinder 41 is filled with a stainless steel winding mesh 7 as shown in Figure 5 The stainless steel winding mesh 7 is a wire cake made of stainless steel wire coiled and brazed.

[0044] The outer wall of the cyclone cylinder 41 is fixed with a cyclone plate 42, the front end of the cyclone plate 42 is fixed on the front partition plate 3, the rear end of the cyclone plate 42 is fixed on the rear partition plate 5, and the bottom end of the cyclone plate 42 is fixed on the outer wall of the cyclone cylinder 41, and the cyclone plate 42 forms an angle less than 90 degrees with the outer wall of the cyclone cylinder 41.

[0045] As shown in Figure 6 shown:

[0046] The main body of the muffling device 10 is an arc-shaped cross-section muffling cylinder 11, and the muffling cylinder 11 is provided with a plurality of muffling cylinder mesh holes 12.

[0047] The front end of the muffling cylinder 11 is provided with a front plate 13, and the rear end of the muffling cylinder 11 is provided with a rear plate 14, and the front plate 13 and the rear plate 14 are respectively provided with a shaft hole in communication with the inner cavity of the muffling cylinder 11.

[0048] The diameters of the front plate 13 and the rear plate 14 are greater than the diameter of the muffling cylinder 11, and the front plate 13 and the rear plate 14 are fixed to the inner wall of the muffling cylinder 11.

[0049] The outer wall of the muffling cylinder 11 is fixed with a baffle plate 18, the front end of the baffle plate 18 is fixed on the front plate 13, the rear end of the baffle plate 18 is fixed on the rear plate 14, and the bottom end of the baffle plate 18 is fixed on the outer wall of the muffling cylinder 11, and the baffle plate 18 forms an angle less than 90 degrees with the outer wall of the muffling cylinder 11.

[0050] The muffling cylinder 11 is provided with a plurality of parallel muffling sheets 15, each of which has an arc-shaped notch 16, and a plurality of muffling holes 17 are formed in each of the muffling sheets 15.

[0051] In actual use:

[0052] The tail gas enters the cylinder 6 from the air inlet pipe 1.

[0053] The front partition plate 3 is provided with a front partition plate mesh hole 30, and the water vapor separation cavity is formed by the front partition plate 3, the rear partition plate 5, the outer wall of the cyclone cylinder 41 and the inner wall of the cylinder 6. Figure 4 As shown by the arrows, the water vapor separation cavity forms a cyclone in the direction shown by the arrows, and the high-speed rotating airflow is blocked by the cyclone plate 42 after rotating about one circle in the cavity between the cyclone cylinder 41 and the cylinder 6, and enters the inner cavity of the cyclone cylinder 41 through the cyclone cylinder mesh hole 40.

[0054] The airflow continues to pass through the stainless steel winding mesh 7 in the inner cavity of the cyclone cylinder 41 to the rear muffling device 10, and the stainless steel winding mesh 7 is a wire cake made of stainless steel wire by rolling and brazing, and has the characteristics of large specific surface area, strong heat storage capacity and good sound attenuation effect.

[0055] The airflow enters the inner cavity of the muffling cylinder 11 from the shaft hole of the front plate 13, is attenuated through the muffling holes 17 on the muffling sheets 15 and the muffling cylinder mesh holes 12 on the muffling cylinder 11, and is finally discharged from the shaft hole of the rear plate 14 and the air outlet pipe 8.

[0056] The sound attenuation section structure can be adjusted adaptively according to different powers of the hydrogen fuel engine, and is a resistance composite type sound attenuation structure.

[0057] The water vapor separation device is arranged in front of the tail exhaust muffler, and the tail gas is condensed and settled twice in the water vapor separation device, so that the white mist discharged in the tail exhaust can be reduced to the maximum extent. The tail gas enters the device through the air inlet pipe and forms a high-speed cyclone in the water vapor separation device, and the high-temperature water vapor is pre-cooled and condensed into water after impacting the inner surface of the cylinder. The tail gas is further condensed for the second time after passing through the stainless steel winding mesh, and the condensed water can be discharged through the drain hole arranged on the cylinder. The water vapor separation device is provided with a resistance composite type muffler.

[0058] The above only describes the preferred embodiments of the utility model, and it should be pointed out that for ordinary technical personnel in the technical field, a number of modifications or equivalent replacements can be made without departing from the technical scheme of the utility model, for example, the centrifugal water vapor separation structure in the utility model can be arranged alone, arranged behind the muffler or used in a radial air inlet, and the outer cylinder with a circular cross section can be replaced by an elliptical shape, a similar elliptical shape, a square shape, a rounded square shape or other shapes with the same effect, which are all considered as the protection scope of the utility model.

[0059] The various embodiments described in this specification are presented by way of example, and each embodiment is not necessarily composed of all features described with respect to other embodiments. Each embodiment described in this specification can be implemented in conjunction with one or more other embodiments described in this specification without departing from the scope or spirit of the present application. The above-described embodiments of the present application are intended to be illustrative only. Changes can be made by one of ordinary skill in the art to the compositions, processes, and methods described without departing from the spirit or scope of the application. The application is not limited to the embodiments described herein, but can be practiced with modification and alteration within the scope of the appended claims.

Claims

1. A hydrogen fuel cell system exhaust water vapor separation muffler characterized by: The front end cover and the rear end cover are respectively arranged at two ends of the cylinder body; the air inlet pipe passes through the front end cover to enter the cylinder body, and the air outlet pipe passes through the rear end cover to enter the cylinder body; the cylinder body is provided with a drain pipe; the centrifugal water-vapor separation device and the muffling device are arranged in the cylinder body; the main body of the centrifugal water-vapor separation device is a cyclone cylinder, the front end of the cyclone cylinder is provided with a front partition plate, and the rear end of the cyclone cylinder is provided with a rear partition plate. The diameters of the front partition plate and the rear partition plate are greater than the diameter of the cyclone cylinder, and the front partition plate and the rear partition plate are fixed to the inner wall of the cyclone cylinder; a plurality of front partition plate mesh holes are arranged in the part of the front partition plate which is greater than the outer diameter of the cyclone cylinder; the rear partition plate is provided with a shaft hole; a plurality of cyclone cylinder mesh holes are arranged in the front part of the cyclone cylinder wall, and the rear part of the inner cavity of the cyclone cylinder is filled with a stainless steel winding net; the outer wall of the cyclone cylinder is fixed with a cyclone plate, the front end of the cyclone plate is fixed to the front partition plate, the rear end of the cyclone plate is fixed to the rear partition plate, the bottom end of the cyclone plate is fixed to the outer wall of the cyclone cylinder, and the cyclone plate and the outer wall of the cyclone cylinder form an included angle less than 90 degrees.

2. A hydrogen fuel cell system water vapor exhaust separation muffler as set forth in claim 1 wherein: The stainless steel winding net is woven into a wave-peak and wave-valley shape by a cylindrical stainless steel wire and is wound layer by layer.

3. A hydrogen fuel cell system water vapor exhaust separation muffler as set forth in Claim 1 wherein: The main body of the muffling device is a muffling cylinder with an arc-shaped cross section, a plurality of muffling cylinder mesh holes are arranged in the muffling cylinder; the front end of the muffling cylinder is provided with a front plate, the rear end of the muffling cylinder is provided with a rear plate, the front plate and the rear plate are respectively provided with a shaft hole which is in communication with the inner cavity of the muffling cylinder; the diameters of the front plate and the rear plate are greater than the diameter of the muffling cylinder, and the front plate and the rear plate are fixed to the inner wall of the muffling cylinder; the outer wall of the muffling cylinder is fixed with a baffle, the front end of the baffle is fixed to the front plate, the rear end of the baffle is fixed to the rear plate, the bottom end of the baffle is fixed to the outer wall of the muffling cylinder, and the baffle and the outer wall of the muffling cylinder form an included angle less than 90 degrees; a plurality of parallel muffling sheets are arranged in the inner cavity of the muffling cylinder, and a plurality of muffling holes are arranged in each muffling sheet.

4. A hydrogen fuel cell system water vapor exhaust separation muffler as set forth in Claim 3 wherein: Each muffling sheet has an arc-shaped notch.

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