Drying device

Abstract

The utility model relates to a drying device, and relates to the technical field of drying equipment, the drying device comprises a plurality of drying ovens which are combined in series, each drying oven comprises a box body, the interior of each box body is hollow to form a drying cavity, the drying cavities in the plurality of box bodies are communicated, a plurality of carrier rollers are uniformly arranged in the middle of each drying cavity at intervals, and an air distribution plate is arranged above the carrier rollers; an air feeder is arranged above the box body, an air outlet of the air feeder communicates with the upper portion of the drying cavity, an air inlet of the air feeder communicates with the lower portion of the drying cavity through an air return pipeline, and a heating assembly used for heating air is arranged in the air return pipeline. The carbon fiber paper drying device has the effects that the carbon fiber paper is dried while being conveyed, the drying temperature of each drying oven can be independently controlled, and the drying efficiency and the drying quality are improved.

Description

Technical Field

[0001] The present application relates to the technical field of drying equipment, and in particular to a drying device. Background Art

[0002] Carbon fiber paper is a porous carbon / carbon composite material composed of carbon fiber and carbon matrix. Carbon fiber paper (hereinafter referred to as "carbon paper") is often used to process the gas diffusion layer (GDL) in proton exchange membrane fuel cells (PEMFC). As the supporting material of the diffusion layer of proton exchange membrane fuel cells (PEMFC), it has the dual functions of mass transfer and conductivity. It is currently an important matrix material of the gas diffusion layer. The structure and performance of carbon paper have an extremely important influence on the performance of proton exchange membrane fuel cells. Moreover, among various types of fuel cells, proton exchange membrane fuel cells (PEMFC) have attracted much attention in recent years due to their low operating temperature (about 80°C), high power density, fast startup, and fast response to load changes.

[0003] In the production process of carbon fiber paper, the carbon fiber paper needs to be dried. The existing drying equipment has uneven hot air delivery during drying, which can easily lead to uneven drying and affect the quality of the carbon fiber paper. In addition, the existing drying equipment has low efficiency and cannot meet production needs. Utility Model Content

[0004] In order to solve the problems of poor drying quality and low drying efficiency of existing drying devices in the prior art, the present application provides a drying device.

[0005] A drying device provided in the present application adopts the following technical solution: a drying device, comprising a plurality of ovens connected in series, the oven comprising a box body, the interior of the box body is hollow to form a drying chamber, the drying chambers inside the plurality of box bodies are connected, a plurality of rollers are evenly spaced in the middle of the drying chambers, an air distribution plate is provided above the rollers, an air blower is provided above the box body, the air outlet of the air blower is connected to the top of the drying chamber, the air inlet of the air blower is connected to the bottom of the drying chamber through a return air duct, and a heating component for heating the air is provided inside the return air duct.

[0006] By adopting the above technical scheme, the mesh conveyor belt that transports the carbon fiber paper is sequentially conveyed into each oven via the rollers inside the drying chamber, the blower on the box body conveys the air inside the drying chamber upward through the return air duct, the heating component heats the air inside the return air duct, the blower conveys the heated air to the drying chamber through the air outlet, the hot air is evenly conveyed to the surface of the carbon fiber paper through the air distribution plate to heat and dry the carbon fiber paper, and the hot air passes through the mesh conveyor belt and is conveyed upward through the return air duct to form a circulation inside the drying chamber to achieve continuous hot air drying of the carbon fiber paper.

[0007] Optionally, a partition is provided between the drying chambers inside two adjacent boxes, and a through hole is provided on the partition corresponding to the roller.

[0008] By adopting the above technical solution, a partition is arranged between two adjacent drying chambers, so that the two adjacent drying chambers are independent of each other, avoiding heat loss caused by air flow, and improving the drying effect.

[0009] Optionally, an exhaust duct is provided inside the drying chamber, the exhaust ducts inside several of the ovens are connected, an air inlet connected to the drying chamber is provided on the side of the exhaust duct, and an exhaust fan is connected to one side of one of the exhaust ducts.

[0010] By adopting the above technical solution, during the process of drying the carbon fiber paper, hot air blows through the carbon fiber paper to form waste gas with high humidity, and the waste gas enters the exhaust duct through the air inlet and is discharged through the exhaust fan.

[0011] Optionally, a return air outlet is provided in the middle of the drying chamber, and the return air duct is connected to the return air outlet.

[0012] By adopting the above technical solution, the return air port is provided to facilitate the air at the bottom of the drying chamber to enter the return air duct for circulation and drying.

[0013] Optionally, a guide plate is provided at the connection between the top of the box and the air outlet of the blower.

[0014] By adopting the above technical solution, the guide plate guides the air from the air outlet of the blower to the surroundings, so that the hot air is evenly transported to the inside of the drying chamber.

[0015] Optionally, the side walls of the box body are made of heat-insulating material.

[0016] By adopting the above technical solution, the side walls of the box body are made of thermal insulation material to improve the thermal insulation performance of the box body and thus improve the utilization rate of heat.

[0017] Optionally, at least two air inlets are provided on a side wall of one side of the box body.

[0018] By adopting the above technical solution, the air inlet is used to introduce external air into the drying chamber for heating to perform hot air drying on the carbon fiber paper, so that circulation is formed inside the drying chamber.

[0019] Optionally, several bottoms of the boxes are fixedly connected via a base.

[0020] In summary, the present application includes at least one of the following beneficial technical effects:

[0021] The drying device in the present application is composed of multiple ovens, and the carbon fiber paper passes through the multiple ovens in sequence for drying. At the same time, the multiple ovens are relatively independent, so that the carbon fiber paper can be dried while being conveyed, and the drying temperature of each oven can be controlled individually, thereby improving the drying efficiency and drying quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the main structure of a drying device in an embodiment of the present application.

[0023] Figure 2 It is a schematic diagram of the top view of the structure of a drying device in an embodiment of the present application.

[0024] Figure 3 It is a schematic diagram of the internal structure of a drying oven in an embodiment of the present application from a front view.

[0025] Figure 4 It is a schematic diagram of the internal structure of a drying oven from the right side in an embodiment of the present application.

[0026] Explanation of the reference numerals: 1. oven; 2. exhaust fan; 3. box body; 4. base; 5. air distribution plate; 6. guide plate; 7. air supply fan; 8. air inlet; 9. roller; 10. exhaust duct; 11. return air outlet; 12. return air duct; 13. heating component; 14. drying chamber. DETAILED DESCRIPTION

[0027] The following is an explanation of the implementation of the present application by means of specific embodiments. People familiar with the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification.

[0028] See also Figure 1-4 . It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the restrictive conditions for the implementation of this application, so they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects and purposes that can be achieved by this application, should still fall within the scope of the technical content disclosed in this application. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" cited in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of this application. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of this application without substantially changing the technical content.

[0029] The following is combined with Figure 1-4 This application is described in further detail.

[0030] This embodiment discloses a drying device.

[0031] Reference Figure 1 and Figure 2 A drying device comprises a plurality of ovens 1, the bottoms of the plurality of ovens 1 are connected and fixed in series in sequence through a base 4, and the interiors of the plurality of ovens 1 are interconnected.

[0032] Reference Figure 3 and Figure 4 The oven 1 includes a box body 3, which is made of a heat-insulating material. Openings are arranged on opposite sides of the box body 3. The inside of the box body 3 is hollow to form a drying chamber 14. Two adjacent boxes 3 are connected to each other through the openings so that the internal drying chambers 14 are connected. A plurality of rollers 9 are arranged in the middle of the drying chamber 14. The plurality of rollers 9 are evenly spaced along the opening direction of the box body 3. A partition is arranged between two adjacent drying chambers 14. Through holes are arranged on the partition corresponding to the rollers 9 to facilitate the passage of the mesh conveyor belt. An air distribution plate 5 is arranged above the rollers 9. A plurality of air holes for ventilation are opened on the surface of the air distribution plate 5. The hot air is evenly transported downward to the surface of the carbon fiber paper through the air distribution plate 5. A blower 7 is arranged above the box body 3. The outlet of the blower 7 The air vent is connected to the top of the drying chamber 14, and a guide plate 6 is provided at the connection between the inside of the box body 3 and the air outlet of the blower 7. The guide plate 6 guides and transports the hot air evenly to the surroundings. A return air vent 11 is provided on one side of the bottom of the drying chamber 14. The return air vent 11 is connected to the air inlet of the blower 7 through a return air duct 12. A heating component 13 is provided in the return air duct 12. The heating component 13 adopts a gas heater. The gas heater transports gas to the return air duct 12 and burns it to heat the air. An exhaust duct 10 is provided at the bottom of the drying chamber 14. The exhaust ducts 10 in multiple ovens 1 are connected to each other. An air inlet connected to the drying chamber 14 is provided on one side of the exhaust duct 10, and one side of the middle exhaust duct 10 is connected to the blower 7.

[0033] The implementation principle of a drying device in this embodiment is:

[0034] When drying the carbon fiber paper, the carbon fiber paper is transported to the inside of the box body 3 through the mesh conveyor belt, and the rollers 9 in the drying chamber 14 transport the mesh conveyor belt. The mesh conveyor belt moves between the air distribution plate 5 and the rollers 9 and passes through multiple ovens 1 in turn. The blower 7 above the oven 1 continues to operate, and the blower 7 extracts the air in the drying chamber 14 through the return air duct 12 and then heats it through the heating component 13. The heated air is transported to the inside of the drying chamber 14 through the blower 7, and the guide plate 6 at the air outlet of the blower 7 transports the hot air to the surroundings, and the hot air is then evenly transported downward to the carbon fiber paper through the air distribution plate 5. The hot air passes through the carbon fiber paper to heat and dry it. The exhaust gas generated during the drying process is transported downward, and the exhaust gas enters the exhaust duct 10 through the air inlet on the side of the exhaust duct 10 and is then discharged through the exhaust fan 2. At the same time, the outside air enters the drying chamber 14 through the air inlet 8. The outside air is mixed with the hot air and then transported to the return air duct 12 through the return air port 11 for heating, and then transported to the drying chamber 14 through the blower 7 to dry the carbon fiber paper to realize the cycle drying operation. The box body 3 adopts heat-insulating material and is relatively sealed, so as to improve the utilization rate of heat and improve the drying effect.

[0035] In summary, the drying device in the present application is composed of multiple ovens, and the carbon fiber paper passes through the multiple ovens in sequence for drying. At the same time, the multiple ovens are relatively independent, so that the carbon fiber paper can be dried while being transported, and the drying temperature of each oven can be controlled separately, thereby improving the drying efficiency and drying quality. Therefore, the present application effectively overcomes various shortcomings in the prior art and has a high industrial utilization value.

[0036] The above embodiments are merely illustrative of the principles and effects of the present application and are not intended to limit the present application. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present application. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed in the present application shall still be included in the protection scope of the present application.

Claims

1. A drying device, characterized in that: The invention comprises a plurality of drying ovens (1) connected in series, wherein the drying oven (1) comprises a box body (3), wherein the interior of the box body (3) is hollow to form a drying chamber (14), wherein the drying chambers (14) in the plurality of the box bodies (3) are connected, wherein a plurality of rollers (9) are evenly spaced in the middle of the drying chamber (14), wherein an air distribution plate (5) is arranged above the rollers (9), wherein an air supply fan (7) is arranged above the box body (3), wherein an air outlet of the air supply fan (7) is connected to the top of the drying chamber (14), wherein an air inlet of the air supply fan (7) is connected to the bottom of the drying chamber (14) via a return air duct (12), wherein a heating component (13) for heating air is arranged inside the return air duct (12).

2. A drying device according to claim 1, characterized in that: A partition is provided between the drying chambers (14) inside two adjacent boxes (3), and a through hole is provided on the partition corresponding to the roller (9).

3. A drying device according to claim 1, characterized in that: An exhaust duct (10) is arranged inside the drying chamber (14); the exhaust ducts (10) inside a plurality of the ovens (1) are connected; an air inlet connected to the drying chamber (14) is arranged on a side of the exhaust duct (10); and an exhaust fan (2) is connected to one side of one of the exhaust ducts (10).

4. A drying device according to claim 1, characterized in that: An air return port (11) is provided in the middle of the drying chamber (14), and the air return duct (12) is connected to the air return port (11).

5. A drying device according to claim 1, characterized in that: A guide plate (6) is provided at the connection between the upper part of the box body (3) and the air outlet of the air blower (7).

6. A drying device according to claim 1, characterized in that: The side walls of the box body (3) are made of thermal insulation material.

7. A drying device according to claim 1, characterized in that: At least two air inlets (8) are provided on a side wall of one side of the box body (3).

8. A drying device according to claim 1, characterized in that: The bottoms of a plurality of the boxes (3) are fixedly connected via a base (4).

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