CN216928647U

CN216928647U - Humidifier of fuel cell system

Info

Publication number: CN216928647U
Application number: CN202122831211.8U
Authority: CN
Inventors: 韦浩; 黄潜
Original assignee: Shanghai Re Fire Energy and Technology Co Ltd
Current assignee: Shanghai Re Fire Energy and Technology Co Ltd
Priority date: 2021-11-15
Filing date: 2021-11-15
Publication date: 2022-07-08
Anticipated expiration: 2031-11-15

Abstract

The present invention provides a humidifier of a fuel cell system, comprising: a dry gas inlet channel and a dry gas outlet channel are arranged on two sides of the humidifier shell along the diagonal direction; the humidifier shell is provided with a moisture inlet and a moisture outlet; the multilayer film tube assembly is arranged in the humidifier shell; each membrane tube assembly layer comprises a plurality of membrane tube assemblies; each membrane tube assembly comprises a tube part and a plurality of membrane tubes; the plurality of membrane tubes are arranged in the tube part in an axially dense manner along the tube part; both ends of all the membrane tubes are respectively connected with a dry gas inlet channel and a dry gas outlet channel; the pipe portion is communicated with the wet gas inlet and the wet gas outlet; the pipe sections of different layers differ in size; the two fixing parts are arranged on two sides of the multilayer film tube component layer, and two ends of the fixing plate are respectively connected with two side walls of the humidifier shell in the front-back direction. According to the utility model, through improving the size and the structure of the increased pipe part, the flow field of the moisture and the dry gas in the humidifier can be kept uniform, and the humidification efficiency of the humidifier is improved.

Description

Humidifier of fuel cell system

Technical Field

The present invention relates to the field of fuel cell technology, and more particularly to the field of fuel cell system humidifiers.

Background

A fuel cell is a power generation system that converts chemical energy of a fuel into electrical energy by a chemical reaction with oxygen or other oxidant. Typically, hydrogen is the most common fuel, but hydrocarbons such as natural gas and alcohols like methanol can sometimes be used as fuel.

Fuel cell systems typically include a stack that includes a plurality of individual fuel cells that form a power generation assembly, each having a cathode and an anode that allow charge to move on either side of the fuel cell. The fuel cell system further includes an air supply device that supplies air to the cathode of the fuel cell and a hydrogen supply device that supplies hydrogen to the anode of the fuel cell. Here, the high-temperature and humidified air is discharged from the cathode of the fuel cell.

In addition, the fuel cell system also includes a humidifier that humidifies air supplied from an air supply apparatus, one type of which is widely used is a membrane humidifier. Traditionally, membrane humidifiers are divided into a dry side and a wet side. Air exhausted from the cathode of the fuel cell enters the wet side of the humidifier. The moist air passes through a special membrane material to transfer moisture to the dry side, thereby humidifying the air from the air supply to supply it to the cathode. Typically, the membrane tubes are housed within several modules and integrated into the humidifier. The membrane tube is internally circulated with dry gas and externally circulated with wet gas.

In the case where existing humidifier housings cannot be modified; the existing dry gas is generally introduced into one end of the module through an inclined molded line, and meanwhile, the calibers of the modules are consistent and are uniformly distributed in an array; however, as can be seen from simulation and actual testing, the dry air inlet amount of the front module is small, and the dry air inlet amount of the rear module is large, so that the dry air flow field of the whole humidifier is not uniform.

In addition, the existing moisture enters from the front of the gaps of a plurality of parallel modules and enters into the modules through the side windows of the modules; in this case, the amount of moisture entering the side window of the front module is small, and the amount of moisture entering the side window of the rear module is large, resulting in non-uniform moisture flow field of the entire humidifier.

SUMMERY OF THE UTILITY MODEL

In view of the above-described drawbacks of the prior art, an object of the present invention is to provide a humidifier for a fuel cell system, which solves the problem in the prior art that it is difficult to keep a flow field of wet gas and dry gas inside the humidifier uniform in a state where a humidifier housing cannot be changed.

To achieve the above and other related objects, the present invention provides a humidifier for a fuel cell system, comprising:

the humidifier comprises a humidifier shell, wherein a dry gas inlet channel and a dry gas outlet channel are arranged on two sides of the humidifier shell along the diagonal direction; a side wall of the humidifier shell along the left and right direction is respectively provided with a moisture inlet and a moisture outlet;

the membrane tube component layers are arranged in the humidifier shell in a multilayer manner; each membrane tube assembly layer comprises a plurality of membrane tube assemblies; a plurality of the membrane tube assembly layers are stacked in a thickness direction of the humidifier housing; each membrane tube assembly comprises a tube part and a plurality of membrane tubes; the membrane tubes are densely arranged in the tube part along the axial direction of the tube part; both ends of the membrane tube are respectively connected with the dry gas inlet channel and the dry gas outlet channel; the tube portion is in communication with the moisture inlet and the moisture outlet; the dimensions of the tube portions of different layers are different;

the two fixing parts are arranged on two sides of the multilayer film tube component layer, and two ends of the fixing plate are respectively connected with two side walls of the humidifier shell in the left and right directions.

Preferably: the duct portion distal from the dry gas inlet passage has a dimension greater than a dimension of the duct portion proximal to the dry gas inlet passage.

Preferably: the side of the tube portion is provided with a plurality of rectangular array openings.

Preferably: the number of openings of the duct portion near the moisture inlet is greater than the number of openings of the duct portion far from the moisture inlet.

Preferably: the dry gas inlet channel and the dry gas outlet channel are both provided with an inclined side wall, and the molded line direction of the inclined side wall gradually faces to the axial direction of the pipe part from the outlet to the inlet.

As described above, a humidifier of a fuel cell system of the present invention has the following advantageous effects:

under the condition that the shell of the humidifier cannot be changed, the size and the structure of the pipe part of the humidifier are improved, so that the uniformity of the flow field of moisture and dry gas in the humidifier can be kept, and the humidification efficiency of the humidifier is improved.

Drawings

Fig. 1 is a perspective view showing a humidifier of a fuel cell system according to the present invention;

fig. 2 is a side view of a housing and a plurality of tube portions therein of a humidifier for a fuel cell system according to the present invention;

fig. 3 is a sectional view showing a humidifier of a fuel cell system according to the present invention;

fig. 4 is a perspective view of a plurality of tube portions of a fuel cell system of the present invention.

Description of the element reference numerals

1 humidifier housing

11 dry gas outlet channel

11a inclined side wall

12 dry gas inlet channel

13 moisture inlet

14 moisture outlet

21 membrane tube module layer

211 membrane tube assembly

211a pipe part

212 opening (212)

3 fixed part

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.

Please refer to fig. 1 to 4. It should be understood that the structures, ratios, sizes, and the like shown in the drawings are only used for matching the disclosure of the present disclosure, and are not used for limiting the conditions that the present disclosure can be implemented, so that the present disclosure is not limited to the technical essence, and any structural modifications, ratio changes, or size adjustments should still fall within the scope of the present disclosure without affecting the efficacy and the achievable purpose of the present disclosure. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.

As shown in fig. 1, the present invention provides a humidifier for a fuel cell system, comprising:

the humidifier comprises a humidifier shell 1, wherein a dry gas inlet channel 12 and a dry gas outlet channel 11 are arranged on two sides of the humidifier shell 1 along the diagonal direction; a side wall of the humidifier housing 1 in the left-right direction is provided with a moisture inlet 13 and a moisture outlet 14, respectively;

a plurality of membrane tube assembly layers 21, the plurality of membrane tube assembly layers 21 being provided in the humidifier housing 1; each membrane tube assembly layer 21 comprises a plurality of membrane tube assemblies 211; a plurality of membrane tube assembly layers 21 are stacked in the thickness direction of the humidifier housing 1; each membrane tube assembly 211 comprises a tube portion 211a and a plurality of membrane tubes; the plurality of membrane tubes are densely arranged in the tube part 211a along the axial direction of the tube part 211 a; both ends of all the membrane tubes are respectively connected with a dry gas inlet channel 12 and a dry gas outlet channel 11; the pipe portion 211a communicates with the moisture inlet 13 and the moisture outlet 14;

two fixing portions 3, the two fixing portions 3 are provided on both sides of the multilayer film tube assembly layer 21 in the left-right direction, and both ends of the fixing portions 3 are connected to both side walls of the humidifier housing 1 in the front-rear direction, respectively.

The utility model carries out the transportation of the dry gas B through all the hollow membrane tubes; the dry gas B enters from a dry gas inlet channel 12, then enters into a hollow membrane tube, and then exits from a dry gas outlet channel 11; at the same time, the moisture a enters from the moisture inlet 13 and then enters into the tube portion 211 a; since the fine pore diameters provided on the surface of the membrane tube allow only water molecules to pass through, water molecules of the moisture a enter the hollow membrane tube through the fine pore diameters, thereby humidifying the dry gas B.

After the dry gas B enters the dry gas inlet passage 12, the distribution of the respective pipe portions 211a entering through the passage of the dry gas inlet passage 12 is uneven, resulting in excessive dry gas existing in one part of the pipe portions 211a, while a smaller amount of dry gas B exists in the other part of the pipe portions 211 a; in order to make the distribution of the dry gas flow field more uniform, the pipe parts 211a at different positions in front and back are adjusted in different sizes, so that the distribution of the flow field of the dry gas B is more uniform.

Since the dry gas B is generally disposed more deeply in the dry gas inlet passage 12, as shown in fig. 2, the pipe portion 211a disposed far from the dry gas inlet passage 12 has a larger size than the pipe portion 211a disposed near the dry gas inlet passage 12, so as to achieve more uniform distribution of the flow field of the dry gas B.

Since the moisture a generally enters the tube portion 211a through the side surface of the tube portion 211a, a rectangular array of openings 212 is now provided in the side surface of the tube portion 211a in order to achieve concentrated opening of the communication portion to the side surface of the tube portion 211 a.

In the case where the pipe portion 211a is the same size, the moisture a is generally concentrated in a deep position near the moisture inlet 13 (i.e., away from the inlet position), and therefore it is necessary to carry more of the moisture a into the pipe portion 211 a; therefore, the number of the openings 212 of the pipe portion 211a close to the moisture inlet 13 is larger than the number of the openings 212 of the pipe portion 211a far from the moisture inlet 13.

In order to guide the dry gas B, the dry gas B smoothly flows into the membrane tube, and the dry gas B can smoothly flow out of the membrane tube, so that turbulent flow is reduced; now, the dry gas inlet passage 12 and the dry gas outlet passage 11 are both provided with an inclined side wall 11a, and the line direction of the inclined side wall 11a gradually faces the axial direction of the pipe portion 211a from the outlet to the inlet.

In summary, the pipe parts 211a with different sizes are arranged to adapt to the dry gas flow at different positions, so that the flow field of the dry gas B is more uniform; meanwhile, the distribution of the flow of the moisture a is achieved by providing different numbers of openings 212 at different positions of the tube portion 211a, so that the flow field of the moisture a is more uniform. In addition, in order to guide the dry gas B, the dry gas inlet passage 12 and the dry gas outlet passage 11 are each provided with an inclined side wall 11a such that the line direction of the inclined side wall 11a gradually moves from the outlet to the inlet toward the axial direction of the tube portion 211 a.

Therefore, the utility model effectively overcomes various defects in the prior art and has high industrial utilization value.

The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the utility model. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims

1. A humidifier for a fuel cell system, comprising:

the humidifier comprises a humidifier shell, wherein a dry gas inlet channel and a dry gas outlet channel are arranged on two sides of the humidifier shell along the diagonal direction; the side walls of the humidifier shell along the left and right directions are respectively provided with a moisture inlet and a moisture outlet;

the membrane tube assembly layers are arranged in the humidifier shell; each membrane tube assembly layer comprises a plurality of membrane tube assemblies; a plurality of the membrane tube assembly layers are stacked in a thickness direction of the humidifier housing; each membrane tube assembly comprises a tube part and a plurality of membrane tubes; the membrane tubes are densely arranged in the tube part along the axial direction of the tube part; both ends of all the membrane tubes are respectively connected with the dry gas inlet channel and the dry gas outlet channel; the tube portion is in communication with the moisture inlet and the moisture outlet; the dimensions of the tube portions of different layers are different;

the two fixing parts are arranged on the two sides of the multilayer film tube assembly layer in the left-right direction, and the two ends of the fixing parts are respectively connected with the two side walls of the humidifier shell in the front-back direction.

2. The humidifier for a fuel cell system according to claim 1, wherein: the duct portion distal from the dry gas inlet passage has a dimension greater than a dimension of the duct portion proximal to the dry gas inlet passage.

3. A humidifier for a fuel cell system according to claim 1, wherein: the side of the tube portion is provided with a plurality of rectangular array openings.

4. A humidifier for a fuel cell system according to claim 3, wherein: the rectangular array of open areas of the tube portions proximal to the moisture inlet is larger than the rectangular array of open areas of the tube portions distal from the moisture inlet.

5. A humidifier for a fuel cell system according to claim 1, wherein: the dry gas inlet channel and the dry gas outlet channel are both provided with an inclined side wall, and the molded lines of the inclined side walls gradually face to the axial direction of the pipe part.