Hot air circulating system applied to hydrogen production carbon paper material

Abstract

The utility model relates to the technical field of hot air circulation systems, in particular to a hot air circulation system applied to hydrogen production carbon paper materials, which comprises a box body, the box body comprises a combustion chamber and an air collecting chamber, the combustion chamber is positioned at the top of the air collecting chamber, an air inlet pipe is inserted into the top surface of the box body, and a combustion head is mounted on the side wall of the box body and positioned in the combustion chamber; the top end of the exhaust pipe is aligned with the output end of the fan; the bottom end of the exhaust pipe is aligned with the air collection chamber; an air collection box is mounted at the bottom of the exhaust pipe; a drying device is fixed on the bottom surface of the air collection box; an air inlet pipe is installed at the end, away from the exhaust pipe, in the oven body, the top end of the air inlet pipe is aligned to the combustion chamber, the bottom end of the air inlet pipe is aligned to the air collecting chamber, and energy waste in the drying process can be reduced.

Description

Technical Field

[0001] The present application relates to the technical field of hot air circulation systems, and in particular to a hot air circulation system for hydrogen production carbon paper materials. Background Art

[0002] Carbon paper is a material used in the gas diffusion layer (GDL) of a fuel cell and is a core component of the fuel cell. The performance of carbon paper directly affects the performance, energy efficiency and service life of the fuel cell.

[0003] Carbon paper made of long carbon fibers has a larger pore size, which is beneficial to the transmission and penetration of water. However, the surface roughness of carbon paper made of long carbon fibers is relatively large, which will cause the battery to produce a larger ohmic impedance. In order to reduce the roughness of the carbon paper surface and reduce the direct contact loss between the microporous layer of the carbon paper and the CCM, thereby reducing the contact resistance, a layer of microporous layer slurry is generally coated on the surface of the carbon paper, and then the glue coated on the surface of the carbon paper is dried in a drying furnace. The current drying furnace continuously delivers air at room temperature, and then heats the air to dry the glue coated on the surface of the carbon paper. This method requires more energy consumption, which leads to increased costs and waste of resources.

[0004] The current drying device continuously delivers room temperature air and then heats the air to dry the diaphragm. This method consumes a lot of energy, which leads to increased costs and waste of resources. Summary of the invention

[0005] In order to effectively recycle the energy in the drying process, the present application provides a hot air circulation system for hydrogen production carbon paper material.

[0006] The present application provides a hot air circulation system for hydrogen production carbon paper material, which adopts the following technical solution:

[0007] A hot air circulation system for hydrogen production carbon paper materials includes a box body, the box body includes a combustion chamber and an air collecting chamber, the combustion chamber is located at the top of the air collecting chamber, an air inlet pipe is inserted into the top surface of the box body, a combustion head is installed on the side wall of the box body, and the combustion head is located in the combustion chamber, a fan is installed on the side of the box body away from the combustion head, an exhaust pipe is installed in the box body, the top end of the exhaust pipe is aligned with the fan output end, and the bottom end of the exhaust pipe is aligned with the air collecting chamber, an air collecting box is installed at the bottom of the exhaust pipe, a drying device is fixed to the bottom surface of the air collecting box, an oven is fixed to the bottom surface of the box body, an air outlet end of the drying device is located in the oven, the oven cavity is connected to the air collecting chamber, and an air inlet pipe is installed at one end of the box body away from the exhaust pipe, the top end of the air inlet pipe is aligned with the combustion chamber, and the bottom end of the air inlet pipe is aligned with the air collecting chamber.

[0008] By adopting the above technical scheme, after the external air enters the combustion chamber from the air inlet pipe, the combustion head is started, and the fire ejected from the output end of the combustion head heats the air, thereby increasing the temperature of the air entering from the outside, and the fan inhales the heated air. Thereafter, the hot air enters the exhaust duct through the output end of the fan, and the hot air in the exhaust duct enters the air collecting box, and the hot air in the air collecting box enters the drying device. The hot air output from the air outlet end of the drying device dries the glue on the surface of the carbon paper, and the hot air enters the oven cavity. Thereafter, the hot air in the oven cavity enters the air collecting chamber, and the hot air in the air collecting chamber enters the combustion chamber through the air inlet pipe, thereby forming a cycle.

[0009] In comparison, the burner head continuously heats the room temperature air newly input into the combustion chamber through the air inlet pipe, and the present application mainly heats the hot air entering the combustion chamber through the air inlet pipe through the burner head. The burner head sprays flames mainly by consuming natural gas, and the time and natural gas consumed in heating the hot air entering the combustion chamber through the air inlet pipe are less, thereby effectively realizing energy recovery and utilization in the drying process.

[0010] Preferably, a fire baffle is fixed to the inner wall of the box body, the fire baffle is located at one end of the box body close to the fan, the fire baffle is located between the fan and the combustion head, and a flow hole is opened through the side wall of the fire baffle.

[0011] By adopting the above technical solution, the fire ejected from the burner head can be shielded by the fire baffle to reduce the possibility of the fire ejected from the burner head burning the fan, while the air heated by the burner head can enter the fan through the circulation hole.

[0012] Preferably, the fire baffle is a zigzag plate, and the opening of the fire baffle is aligned with the fan.

[0013] By adopting the above technical solution, the broken line plate can reduce the resistance of air flowing from one end of the combustion head to the fan, thereby reducing the situation where the hot air is damaged by the large resistance when passing through the fire baffle.

[0014] Preferably, an air volume regulating valve is installed on the top of the air inlet pipe.

[0015] By adopting the above technical solution, under the action of the air volume regulating valve, the passage for external air to enter the combustion chamber can be opened or closed, and at the same time, the amount of external air entering the combustion chamber can also be adjusted.

[0016] Preferably, a filter is installed inside the air intake pipe, and the filter is located at the bottom of the air volume regulating valve.

[0017] By adopting the above technical solution, the air can be filtered under the action of the filter to reduce the impurities in the air entering the combustion chamber. The hot air in the combustion chamber subsequently dries the glue coated on the surface of the carbon paper, thereby reducing the impurities covering the surface of the carbon paper.

[0018] Preferably, a shutter valve is installed on the side wall of the box body, and the shutter valve passes through the side wall of the box body and the outer wall of the air inlet pipe.

[0019] By adopting the above technical solution, under the action of the shutter valve, the amount of hot air from the air collecting chamber entering the combustion chamber through the air inlet pipe can be adjusted.

[0020] Preferably, an explosion-proof door is provided on the top surface of the box.

[0021] By adopting the above technical solution, under the action of the explosion-proof door, the situation of explosion caused by excessive pressure in the box can be reduced.

[0022] Preferably, there are multiple drying devices, and the multiple drying devices are distributed along the long side of the air collecting box.

[0023] By adopting the above technical solution, when the carbon paper moves along the long side of the oven, under the action of multiple drying devices, the hot air output from the air outlets of the multiple drying devices can dry the glue on the surface of the carbon paper during the movement of the carbon paper, thereby improving the efficiency of drying the glue on the surface of the carbon paper.

[0024] In summary, the present application includes at least one of the following beneficial technical effects:

[0025] 1. Compared with the conventional method, in which the burner head continuously heats the room temperature air newly input into the combustion chamber through the air inlet pipe, the present application mainly heats the hot air entering the combustion chamber through the air inlet pipe through the burner head. The burner head sprays fire mainly by consuming natural gas. The time and natural gas consumed for heating the hot air entering the combustion chamber through the air inlet pipe are less, thereby effectively realizing the energy recovery and utilization in the drying process.

[0026] 2. With the help of the fire baffle, the fire ejected from the burner head can be shielded to reduce the chance of the fire ejected from the burner head burning the fan, while the air heated by the burner head can enter the fan through the circulation hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0028] Explanation of the reference numerals: 1. Box body; 11. Combustion chamber; 12. Air collecting chamber; 13. Fire baffle; 14. Explosion-proof door; 2. Air inlet pipe; 21. Air volume regulating valve; 22. Filter; 3. Combustion head; 4. Fan; 5. Exhaust duct; 61. Air collecting box; 62. Drying device; 63. Moving component; 7. Oven; 8. Air inlet pipe; 81. Shutter valve. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1 This application is described in further detail.

[0030] The embodiment of the present application discloses a hot air circulation system for hydrogen production carbon paper material.

[0031] Reference Figure 1 , a hot air circulation system for hydrogen production carbon paper material, including a box body 1, the box body 1 includes a combustion chamber 11 and an air collecting chamber 12, the combustion chamber 11 is located at the top of the air collecting chamber 12, an air intake pipe 2 is inserted into the top surface of the box body 1, external normal temperature air can enter the combustion chamber 11 from the air intake pipe 2, and an air volume regulating valve 21 is installed on the top of the air intake pipe 2. Under the action of the air volume regulating valve 21, it can open or close the channel for external air to enter the combustion chamber 11, and at the same time, it can also adjust the amount of external air entering the combustion chamber 11. A filter 22 is installed inside the air intake pipe 2, and the filter 22 is located at the bottom of the air volume regulating valve 21. Under the action of the filter 22, the air can be filtered to reduce the impurities in the air from entering the combustion chamber 11. When the hot air in the combustion chamber 11 subsequently dries the glue coated on the surface of the carbon paper, the impurities covering the surface of the carbon paper are reduced.

[0032] A combustion head 3 is installed on the side wall of the box body 1, and the output end of the combustion head 3 is aligned with the combustion chamber 11, and the fire ejected from the output end of the combustion head 3 is aligned with the bottom of the intake pipe 2, so that after the external air enters the combustion chamber 11 from the intake pipe 2, the combustion head 3 is started, and the fire ejected from the output end of the combustion head 3 heats the air, thereby increasing the temperature of the air entering from the outside. A fan 4 is installed on the side of the box body 1 away from the combustion head 3, and the input end of the fan 4 is aligned with the output end of the combustion head 3. An exhaust duct 5 is fixed to the inner wall of one end of the box body 1 close to the fan 4, and the top of the exhaust duct 5 is aligned with the output end of the fan 4, and the bottom of the exhaust duct 5 is aligned with the air collecting chamber 12. An air collecting box 61 is fixed to the bottom of the exhaust duct 5, and the air collecting box 61 is located in the air collecting chamber 12.

[0033] The fan 4 inhales the heated air, and then the hot air enters the exhaust duct 5 through the output end of the fan 4, and the hot air in the exhaust duct 5 enters the air collecting box 61. An oven 7 is fixed to the bottom of the box body 1, and the cavity of the oven 7 is connected with the air collecting chamber 12. A drying device 62 is fixed to the bottom of the air collecting box 61, and the air outlet end of the drying device 62 is aligned with the cavity of the oven 7. There are multiple drying devices 62, and the multiple drying devices 62 are evenly distributed along the long side of the air collecting box 61. A moving component 63 is arranged in the oven 7, and the moving component 63 is located at the bottom of the drying device 62. The long side of the moving component 63 is parallel to the long side of the oven 7. Carbon paper is placed on the top surface of the moving component 63. Under the action of the moving component 63, the carbon paper can be driven to move. During the movement of the carbon paper, the hot air output from the air outlet end of the drying device 62 dries the glue on the surface of the carbon paper.

[0034] An air inlet pipe 8 is fixed to one end of the inner wall of the box body 1 away from the exhaust pipe 5. The cavity of the air inlet pipe 8 is connected with the combustion chamber 11 and the air collecting chamber 12 at the same time. A shutter valve 81 is installed on the side wall of the box body 1. The shutter valve 81 passes through the side wall of the box body 1 and the outer wall of the air inlet pipe 8. Under the action of the shutter valve 81, the amount of hot air from the air collecting chamber 12 entering the combustion chamber 11 through the air inlet pipe 8 can be adjusted.

[0035] Reference Figure 1 After the hot air dries the glue on the surface of the carbon paper from the air outlet end of the drying device 62, the hot air enters the cavity of the oven 7, and then the hot air in the cavity of the oven 7 enters the air collecting chamber 12, and the hot air in the air collecting chamber 12 enters the combustion chamber 11 through the air inlet pipe 8, thereby forming a cycle. In comparison, the burner head 3 continuously heats the room temperature air newly input into the combustion chamber 11 from the air inlet pipe 2. The present application mainly heats the hot air entering the combustion chamber 11 from the air inlet pipe 8 through the burner head 3. The flame spraying of the burner head 3 is mainly completed by consuming natural gas, while the time and natural gas consumed for heating the hot air entering the combustion chamber 11 from the air inlet pipe 8 are less, thereby effectively realizing the energy recovery and utilization in the drying process.

[0036] A fire baffle 13 is fixed to the inner wall of the box body 1. The fire baffle 13 is located at one end of the box body 1 close to the fan 4. The fire baffle 13 is located between the fan 4 and the burner head 3. In the embodiment of the present application, the fire baffle 13 is a zigzag plate. The opening of the fire baffle 13 is aligned with the fan 4. A flow hole is penetrated through the side wall of the fire baffle 13. There are multiple flow holes, and the multiple flow holes are arranged and distributed on the side wall of the fire baffle 13. Under the action of the fire baffle 13, the fire ejected from the burner head 3 can be blocked to reduce the situation where the fire ejected from the burner head 3 burns the fan 4, and the air heated by the burner head 3 can enter the fan 4 through the flow hole. The zigzag plate can reduce the resistance of air flowing from one end of the burner head 3 to the fan 4, thereby reducing the situation where the hot air is damaged due to large resistance when passing through the fire baffle 13.

[0037] An explosion-proof door 14 is provided on the top surface of the box body 1 , and the explosion caused by excessive pressure in the box body 1 can be reduced by the explosion-proof door 14 .

[0038] The above are all preferred embodiments of the present application. The embodiments are only explanations of the present application and are not intended to limit the protection scope of the present application. Therefore, all equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A hot air circulation system for hydrogen production carbon paper material, characterized in that: The invention comprises a housing (1), wherein the housing (1) comprises a combustion chamber (11) and an air collecting chamber (12), wherein the combustion chamber (11) is located at the top of the air collecting chamber (12), an air intake pipe (2) is inserted into the top surface of the housing (1), a combustion head (3) is installed on the side wall of the housing (1), and the combustion head (3) is located in the combustion chamber (11), a fan (4) is installed on the side of the housing (1) away from the combustion head (3), an exhaust pipe (5) is installed in the housing (1), the top end of the exhaust pipe (5) is aligned with the output end of the fan (4), and the exhaust pipe (5) is ) is aligned with the air collecting chamber (12); an air collecting box (61) is installed at the bottom of the exhaust pipe (5); a drying device (62) is fixed to the bottom of the air collecting box (61); a drying oven (7) is fixed to the bottom of the box body (1); an air outlet end of the drying device (62) is located in the drying oven (7); the cavity of the drying oven (7) is connected to the air collecting chamber (12); an air inlet pipe (8) is installed at one end of the box body (1) away from the exhaust pipe (5); the top end of the air inlet pipe (8) is aligned with the combustion chamber (11); and the bottom end of the air inlet pipe (8) is aligned with the air collecting chamber (12).

2. A hot air circulation system for hydrogen production carbon paper material according to claim 1, characterized in that: A fire baffle (13) is fixed to the inner wall of the box body (1), the fire baffle (13) is located at one end of the box body (1) close to the fan (4), the fire baffle (13) is located between the fan (4) and the combustion head (3), and a flow hole is opened through the side wall of the fire baffle (13).

3. The hot air circulation system for hydrogen production carbon paper material according to claim 2, characterized in that: The fire baffle (13) is a zigzag plate, and the opening of the fire baffle (13) is aligned with the fan (4).

4. The hot air circulation system for hydrogen production carbon paper material according to claim 1, characterized in that: An air volume regulating valve (21) is installed on the top of the air inlet pipe (2).

5. The hot air circulation system for hydrogen production carbon paper material according to claim 4, characterized in that: A filter (22) is installed inside the air intake pipe (2), and the filter (22) is located at the bottom of the air volume regulating valve (21).

6. The hot air circulation system for hydrogen production carbon paper material according to claim 1, characterized in that: A shutter valve (81) is installed on the side wall of the box body (1), and the shutter valve (81) passes through the side wall of the box body (1) and the outer wall of the air inlet pipe (8).

7. The hot air circulation system for hydrogen production carbon paper material according to claim 1, characterized in that: The top surface of the box body (1) is provided with an explosion-proof door (14).

8. The hot air circulation system for hydrogen production carbon paper material according to claim 1, characterized in that: There are a plurality of drying devices (62), and the plurality of drying devices (62) are distributed along the long side direction of the air collecting box (61).

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