CN216935090U

CN216935090U - Water diversion device and fuel cell system

Info

Publication number: CN216935090U
Application number: CN202220477106.0U
Authority: CN
Inventors: 张侃侃; 方川; 李文文; 万贺廷; 丁铁新; 袁殿
Original assignee: Beijing Sinohytec Co Ltd
Current assignee: Beijing Sinohytec Co Ltd
Priority date: 2022-03-07
Filing date: 2022-03-07
Publication date: 2022-07-12
Anticipated expiration: 2032-03-07

Abstract

The utility model provides a water diversion device and a fuel cell system, which comprise a shell, a driver and a water diversion device, wherein the driver is arranged in the shell: the water absorption material is arranged on the side wall surface of the shell; the air inlet pipe extends into the shell from the top end of the shell; one end of the rotating shaft extends into the shell from the bottom end of the shell and extends into the outlet end of the air inlet pipe, and the other end of the rotating shaft is connected to a driving shaft of the driver; the air outlet pipe is arranged at the top end of the shell and is arranged at intervals with the air inlet pipe; the impeller is connected to one end of the rotating shaft extending into the shell and is arranged at intervals with the outlet end of the air inlet pipe. The utility model can realize dynamic calibration of the rotating speed of the driver according to the water yield of the fuel cell, namely, the higher the requirement on the water diversion efficiency is, the higher the rotating speed of the driver is.

Description

Water diversion device and fuel cell system

Technical Field

The utility model relates to the technical field of fuel cells, in particular to a water diversion device and a fuel cell system.

Background

In a fuel cell engine, hydrogen in an anode cavity loses electrons under the action of an anode catalyst and is changed into protons, the protons reach a cathode through a proton exchange membrane, the protons obtain electrons under the action of the cathode catalyst and are combined with oxygen in a cathode cavity to generate water, most of the water generated by electrochemical reaction of the cathode is discharged through an air outlet, and a water diversion structure can be designed on the air side in order to better play a role of water drainage.

Still another part of the water is back-diffused through the proton membrane to the anode and exits the stack through the anode outlet, which places higher control requirements on water content because the hydrogen path needs to be recycled into the stack, and a water-vapor separator is designed and used in the fuel cell anode.

The existing water distribution structure mainly comprises: the baffle labyrinth type utilizes the collision wall of gas to separate liquid water; the cyclone structure design, the centrifugal separation function throws the liquid to the wall of the container for separation through the air current; the condensation type is realized in the separating tank by utilizing the gas-liquid condensation separation principle. The disadvantages of the prior structure mainly comprise: the separation efficiency is low, mainly depends on the gas flow velocity to carry out collision separation, and the separation efficiency upper limit is lower, simultaneously, if structural design is complicated, separation efficiency can be high, but can cause the pressure drag big.

Therefore, it is desirable to provide a water diversion apparatus and a fuel cell system to solve the above technical problems in the prior art.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a water diversion device and a fuel cell system, which can improve the water diversion efficiency and lower the water content of separated gas.

In order to realize the purpose, the following technical scheme is provided:

the utility model provides a water diversion device, which comprises a shell, a driver and, arranged in the shell:

a water absorbing material provided on a side wall surface of the housing;

the air inlet pipe extends into the shell from the top end of the shell;

one end of the rotating shaft extends into the shell from the bottom end of the shell and extends into the outlet end of the air inlet pipe, and the other end of the rotating shaft is connected to a driving shaft of the driver;

the air outlet pipe is arranged at the top end of the shell and is arranged at an interval with the air inlet pipe;

the impeller is connected to one end, extending into the shell, of the rotating shaft, and is separated from the outlet end of the air inlet pipe by 5-10 mm.

Optionally, the upper end and the lower end of the impeller are connected to the rotating shaft through a thrust structure.

Optionally, the thrust structure is a washer.

Optionally, a bearing is arranged at the position where the bottom end of the shell penetrates into the rotating shaft to fix the rotating shaft.

Optionally, a water outlet is further formed in the bottom end of the shell, and the water outlet and the rotating shaft are arranged at intervals.

Optionally, the water outlet is connected with a drain valve.

Optionally, the impeller is connected to one end of the rotating shaft extending into the shell and is spaced from the outlet end of the air inlet pipe by 5-10 mm.

Optionally, the water absorbent material is cotton cloth, and/or

The driver is a motor, a turbine or an air compressor.

Optionally, the impeller is of a rectangular structure or an arc structure which is bent downwards from the rotating shaft to the outer side.

The utility model also provides a fuel cell system, and the anode air outlet end and/or the cathode air outlet end of the fuel cell system are/is provided with the water diversion device according to any one of the technical schemes.

Compared with the prior art, the water diversion device and the fuel cell system provided by the utility model have the advantages that the impeller is arranged on the rotating shaft, the interval between the impeller and the air inlet pipe is small, the water absorbing material is arranged on the side wall surface of the shell, so that gas carrying liquid water vapor enters the water diversion device chamber from the air inlet pipe, the impeller rotates at high speed under the action of the driver, the gas flow speed is higher than that before under the rotating force of the impeller, the liquid water vapor is higher in mass and collides with the water absorbing material in an accelerating manner under the action of centrifugal force, the water absorbing material is high in water absorbing performance and poor in water retention capacity, so that the liquid water is collected by the water absorbing material and accumulated at the bottom of the shell along the shell, and the gas is collected at the air outlet along the upper part of the water diversion device chamber and is discharged out of the water diversion device. The utility model can realize dynamic calibration of the rotating speed of the driver according to the water yield of the fuel cell, namely, the higher the requirement on the water diversion efficiency is, the higher the rotating speed of the driver is.

The summary is provided to introduce a selection of concepts in a simplified form that are further described below in the detailed description. The summary is not intended to identify key features or essential features of the disclosure, nor is it intended to limit the scope of the disclosure.

Drawings

The foregoing and other objects, features and advantages of the disclosure will be apparent from the following more particular descriptions of exemplary embodiments of the disclosure as illustrated in the accompanying drawings wherein like reference numbers generally represent like parts throughout the exemplary embodiments of the disclosure.

FIG. 1 shows a schematic structural view of a water diversion apparatus according to an embodiment of the present invention;

fig. 2 shows a schematic configuration diagram of a fuel cell system of an embodiment of the present invention.

Reference numerals:

10-electric pile; 20-an ejector; 30-hydrogen spraying; 40-a water diversion device; 50-an exhaust valve; 60-a drain valve; 70-safety valve;

41-a housing; 42-a water-absorbing material; 43-impeller; 44-a rotating shaft; 45-a driver; 46-an intake pipe; 47-air outlet pipe; 48-a thrust structure; 49-bearing.

Detailed Description

Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

The term "include" and variations thereof as used herein is meant to be inclusive in an open-ended manner, i.e., "including but not limited to". Unless specifically stated otherwise, the term "or" means "and/or". The term "based on" means "based at least in part on". The terms "one example embodiment" and "one embodiment" mean "at least one example embodiment". The term "another embodiment" means "at least one additional embodiment". The terms "first," "second," and the like may refer to different or the same object. Other explicit and implicit definitions are also possible below.

As shown in fig. 1, the present embodiment provides a water diversion apparatus 40 and a fuel cell system, which can improve water diversion efficiency, so that the water content of the separated gas is lower.

In order to realize the purpose, the following technical scheme is provided:

the utility model provides a water diversion device 40, which comprises a shell 41, a driver 45 and, arranged in the shell 41: the water absorption material 42, the air inlet pipe 46, the rotating shaft 44, the air outlet pipe 47 and the impeller 43, wherein the water absorption material 42 is arranged on the side wall surface of the shell 41; the air inlet pipe 46 extends into the housing 41 from the top end of the housing 41; one end of the rotating shaft 44 extends into the casing 41 from the bottom end of the casing 41 and extends into the outlet end of the air inlet pipe 46, and the other end is connected to the driving shaft of the driver 45; the air outlet pipe 47 is arranged at the top end of the shell 41 and is arranged at an interval with the air inlet pipe 46; the impeller 43 is connected to one end of the rotating shaft 44 extending into the housing 41 and is spaced from an outlet end of the air inlet pipe 46.

Preferably, the upper and lower ends of the impeller 43 are connected to the shaft 44 by a thrust structure 48. Further, the thrust structure 48 of the present embodiment is a washer, and two washers are provided on the rotating shaft 44 above and below the impeller 43, respectively, so that the impeller 43 is fixed to the rotating shaft 44.

Optionally, a bearing 49 is provided at the bottom end of the housing 41 penetrating the rotating shaft 44 to fix the rotating shaft 44.

Further, the bottom end of the casing 41 is further provided with a water outlet, the water outlet and the rotating shaft 44 are arranged at intervals, and therefore water flowing to the bottom of the casing 41 along the side wall of the casing 41 can be discharged through the water outlet. Preferably, a drain valve 60 is connected to the water outlet, and when a certain amount of water is accumulated at the bottom of the housing 41, the water can be discharged by opening the drain valve 60.

Optionally, in order to make the air containing water vapor introduced into the housing 41 from the air inlet pipe 46 sufficiently separated by the impeller 43, the impeller 43 is connected to one end of the rotating shaft 44 extending into the housing 41 and is spaced from the outlet end of the air inlet pipe 46 by 5-10mm, so as to achieve the desired effect of sufficiently separating water vapor from air.

Preferably, the water-absorbing material 42 is cotton cloth, which has good water-absorbing property but poor water-retaining property and can quickly drain water down along the side wall of the housing 41.

Alternatively, the driver 45 of the present embodiment is a motor, a turbine, or an air compressor, and can provide reliable and stable power to the rotating shaft 44. The driver 45 of the present embodiment is preferably a motor, and the motor speed can be dynamically calibrated according to the water yield of the fuel cell, that is, the higher the requirement on the water diversion efficiency, the higher the motor speed.

Further, the impeller 43 has a rectangular structure or an arc structure bent downward from the rotation shaft 44 to the outside. The impeller 43 of this kind of structure can be better water conservancy diversion to get rid of liquid water to casing 41 bottom or lateral wall under the effect of centrifugal force, and this kind of arc structure more accords with gaseous streamline special effect, and is little to the resistance of gas, and the air current is more smooth and easy, and the noise is little.

As shown in fig. 2, the present embodiment also provides a fuel cell system, and the anode air outlet end, and/or the cathode air outlet end of the fuel cell system is provided with the above-mentioned water diversion device 40. The water diversion device 40 of the embodiment can be used at the anode air outlet end of the fuel cell and the cathode air outlet end of the fuel cell, and can separate water and vapor of the air discharged from the electric pile 10, so that the water diversion efficiency is improved, and the water content of the separated gas is lower.

Further, the fuel cell system of the embodiment further comprises a galvanic pile 10, an ejector 20, a hydrogen injector 30 and an exhaust valve 50, wherein an inlet of the hydrogen injector 30 is connected with the hydrogen storage device, the other end of the hydrogen injector is connected with a first inlet of the ejector 20, an outlet of the ejector 20 is connected with an anode inlet of the galvanic pile 10, an anode air outlet end of the galvanic pile 10 is connected with an air inlet pipe 46 of the water distribution device 40, a liquid outlet pipe of the water distribution device 40 is connected with a second inlet of the ejector 20, an air outlet pipe 47 of the water distribution device 40 is connected with the exhaust valve 50, and a water outlet at the bottom end of a shell 41 of the water distribution device 40 is connected with a drain valve 60.

Optionally, in order to ensure the inlet gas safety of the anode inlet of the stack 10, a safety valve 70 is connected between the outlet of the ejector 20 and the anode inlet of the stack 10 to monitor the gas pressure in the pipeline at any time, so as to ensure the safety and reliability of the gas pressure in the pipeline.

In comparison with the prior art, in the water diversion device 40 and the fuel cell system according to the present embodiment, the impeller 43 is provided on the rotating shaft 44, the impeller 43 and the intake duct 46 are spaced apart from each other at a small distance, and the water absorbing material 42 is attached to the side wall surface of the housing 41. The water diversion structure of this embodiment makes the gas that carries liquid steam get into the water knockout drum room by intake pipe 46, impeller 43 is high-speed rotatory under the effect of driver 45, gas is under the revolving force of impeller 43, gas flow rate is faster than before, because liquid steam quality is great, under the effect that receives the centrifugal force, on the material 42 that absorbs water is collided with higher speed, the water absorption performance of the material 42 that absorbs water is strong, but the ability of retaining power is poor, liquid water is collected by the material 42 that absorbs water like this, and leave the bottom accumulation of casing 41 along casing 41, when accumulating to a certain amount, drain valve 60 opens and drains water, gas then along water knockout drum room top, collect at outlet duct 47 mouth department, discharge the water knockout drum. According to the embodiment, the rotating speed of the driver 45 can be dynamically calibrated according to the water yield of the fuel cell, namely, the higher the requirement on the water diversion efficiency is, the higher the rotating speed of the driver 45 is.

Having described embodiments of the present disclosure, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terms used herein were chosen in order to best explain the principles of the embodiments, the practical application, or technical improvements to the techniques in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A water diversion device comprising a housing (41), a driver (45), and disposed within the housing (41):

a water absorbing material (42), the water absorbing material (42) being provided on a side wall surface of the housing (41);

an air inlet pipe (46), wherein the air inlet pipe (46) extends into the shell (41) from the top end of the shell (41);

one end of the rotating shaft (44) extends into the shell (41) from the bottom end of the shell (41) and extends into the outlet end of the air inlet pipe (46), and the other end of the rotating shaft (44) is connected to a driving shaft of the driver (45);

the air outlet pipe (47) is arranged at the top end of the shell (41) and is spaced from the air inlet pipe (46);

the impeller (43) is connected to one end, extending into the shell (41), of the rotating shaft (44) and is arranged at intervals with the outlet end of the air inlet pipe (46).

2. A water diversion device according to claim 1, characterized in that the upper and lower ends of the impeller (43) are connected to the shaft (44) by a thrust structure (48).

3. A water diversion device according to claim 2, wherein the thrust structure (48) is a washer.

4. The water diversion device according to claim 1, wherein a bearing (49) is provided at a bottom end of said housing (41) penetrating into said rotary shaft (44) to fix said rotary shaft (44).

5. The water diversion device according to claim 1, wherein a water outlet is further opened at the bottom end of the housing (41), and the water outlet and the rotating shaft (44) are arranged at intervals.

6. A water diversion device according to claim 5 wherein a drain valve (60) is connected to said water outlet.

7. A water diversion device according to claim 1, characterized in that said impeller (43) is connected to the end of said shaft (44) extending into said housing (41) and spaced 5-10mm from the outlet end of said inlet pipe (46).

8. A water-splitting device according to claim 1, wherein the water-absorbing material (42) is cotton cloth, and/or

The driver (45) is a motor, a turbine or an air compressor.

9. The water diversion device according to claim 1, wherein said impeller (43) has a rectangular configuration or an arc configuration bent downward from said rotation shaft (44) to the outside.

10. A fuel cell system, characterized in that the anode air outlet side, and/or the cathode air outlet side of the fuel cell system is provided with a water dividing device (40) according to any of claims 1-9.