Multi-layer drying line

Abstract

The invention relates to the technical field of drying lines, and discloses a multi-layer drying line which comprises a drying box body and drying units. The first cavity comprises an upper air channel, a drying channel and a lower air channel which are sequentially arranged from top to bottom and communicate with one another. A feeding port and a discharging port are formed in one end of the drying channel, the feeding port is formed above the discharging port, a conveying mechanism is arranged in the drying channel, and the conveying mechanism can convey materials from the feeding port to the discharging port; the drying units are arranged in the first cavity, the number of the drying units is multiple, each drying unit comprises a first fan and a heat dissipation piece, the first fan is arranged above the drying box body, a first opening is formed in the end, close to the first fan, of the upper air channel, and the air outlet end of the first fan communicates with the upper air channel through the first opening; the heat dissipation piece is arranged in the lower air duct, a first pipe fitting is further arranged in the lower air duct, the heat dissipation piece is connected with the first pipe fitting, and an air outlet of the lower air duct communicates with the air inlet end of the first draught fan through the first pipe fitting.

Description

Technical Field

[0001] The invention relates to the technical field of drying lines, in particular to a multi-layer drying line. Background Art

[0002] The drying line is a highly efficient drying equipment, which is mainly composed of a multi-layer conveyor belt, a heat source system, a ventilation system, a control system and other parts. This equipment is designed to dry multiple layers of materials at the same time, thereby improving the drying efficiency and saving space. In the multi-layer drying line, the materials are placed on the conveyor belt and dried by the heat energy provided by the heat source system (such as hot air furnace, steam heater, etc.).

[0003] At present, the existing drying lines mostly use radiators as the heat source system of the drying lines to perform drying operations. Affected by the production line capacity and transfer problems, the length of the drying channel of the production line needs to be extended. When the drying channel is lengthened, the radiator in the upper air duct of the drying channel needs to handle more air flow, but often due to design or wind resistance reasons, the radiator cannot process the humid air in various parts of the drying channel at the same time, and the distribution of the air volume dried by the radiator in the drying channel will become uneven. The drying effect of the area of ​​the drying channel close to the radiator is better, and the drying effect of the area of ​​the drying channel far from the radiator is poor, resulting in inconsistent product drying effects and reducing the drying efficiency of the drying line. Summary of the invention

[0004] The technical problem to be solved by the present invention is: in the prior art, when the drying channel is long, the efficiency of the radiator in processing humid air is limited, and the temperature of each part of the drying channel will also be different, resulting in inconsistent product drying effects and reducing the drying efficiency of the drying line.

[0005] In order to solve the above technical problems, the present invention provides a multi-layer drying line, which includes a drying box and a drying unit; a first cavity is arranged inside the drying box, and the first cavity includes an upper air duct, a drying channel and a lower air duct which are arranged in sequence from top to bottom and connected to each other; a feed port and a discharge port are arranged at one end of the drying channel, the feed port is arranged above the discharge port, and a transportation mechanism is arranged in the drying channel, and the transportation mechanism can transport the material from the feed port to the discharge port; the drying unit is arranged in the first cavity, and the number of the drying units is multiple, and the multiple drying units are arranged at intervals along the length direction of the first cavity, each drying unit includes a first fan and a heat sink, the first fan is arranged above the drying box, and a first opening is arranged at one end of the upper air duct close to the first fan, and the air outlet end of the first fan is connected with the upper air duct through the first opening; the heat sink is arranged in the lower air duct, and a first pipe fitting is also arranged in the lower air duct, the heat sink is connected to the first pipe fitting, and the air outlet of the lower air duct is connected with the air inlet end of the first fan through the first pipe fitting.

[0006] In one embodiment, the multi-layer drying line also includes a second fan, which is arranged above the upper air duct, and a second opening is provided at one end of the upper air duct close to the second fan. The second fan is connected to the upper air duct through the second opening to control the balance of pressure and humidity in the first cavity.

[0007] In one embodiment, the second fan also includes a heat exchanger and a second pipe fitting, the air inlet of the heat exchanger is connected to the second opening for extracting water vapor in the first cavity, one end of the second pipe fitting is connected to the air outlet of the heat exchanger, and the other end of the second pipe fitting is connected to the external environment for discharging water vapor.

[0008] In one embodiment, the transport mechanism includes a driving sprocket and a first chain and a second chain extending along the length direction of the first cavity. The driving sprockets are respectively arranged on both sides of the drying channel, and the first chain and the second chain are both arranged between the two driving sprockets. The rotation of the driving sprocket drives the first chain and the second chain to move. The first chain transports the material at the discharge port into the drying channel, and the second chain transports the material in the drying channel to the discharge port.

[0009] In one embodiment, there are multiple first chains and multiple second chains, the multiple first chains are arranged at intervals along the width direction of the first cavity, and the multiple second chains are arranged at intervals along the width direction of the first cavity.

[0010] In one embodiment, each first chain and each second chain is provided with a material tray for placing materials, and the number of the material trays is multiple, and the multiple material trays are arranged at intervals along the length direction of the first cavity.

[0011] In one embodiment, the drying box further includes a first partition and a second partition, the first partition being located between the upper air duct and the drying channel, and the two ends of the first partition being respectively connected to the inner wall of the drying box, the second partition being located between the drying channel and the lower air duct, and the two ends of the second partition being respectively connected to the inner wall of the drying box, and both the first partition and the second partition are provided with through holes for gas circulation.

[0012] In one embodiment, a third opening is provided at one end of the downwind duct close to the discharge port, and the third opening is connected to the external environment and is used to introduce external air into the downwind duct.

[0013] In one embodiment, the first pipe is arranged outside the first cavity, and is used to guide the hot air in the lower air duct into the first fan, and the hot air in the first fan is transferred to the drying channel through the upper air duct.

[0014] Compared with the prior art, a multi-layer drying line according to an embodiment of the present invention has the following beneficial effects: a plurality of drying units are arranged at intervals along the length direction of the first cavity, each drying unit comprises a first fan and a heat sink, the first fan is arranged above the drying box body, a first opening is arranged at one end of the upper air duct close to the first fan, the air outlet end of the first fan is connected to the upper air duct through the first opening, the first fan can blow hot air into the upper air duct, after the first fan is started, hot air is blown into the upper air duct, the hot air passes through the drying channel to dry the material, and the hot air is As it descends from the upper layer to the lower layer step by step, the hot air temperature also decreases, and the humidity increases, becoming wet air, and then flows into the downwind duct. The heat dissipation element in the downwind duct helps to convert the wet air into hot air. The hot air enters the first fan through the first pipe and enters the upwind duct again, so that the hot air circulates in the upwind duct, the drying duct and the downwind duct to continuously dry the material. At the same time, the transportation mechanism transports the material from the feed port to the discharge port. During the transportation, the material is in the drying duct throughout the whole process to ensure that the material is fully dried in the drying duct.

[0015] The present invention arranges a plurality of drying units in a drying box, and each drying unit can form an independent circulating drying system to ensure the uniformity of drying at various positions in the drying box. This effectively solves the problem in the prior art that when the drying channel is long, the efficiency of the radiator in processing humid air is limited, and the temperatures of various parts of the drying channel are different, resulting in inconsistent product drying effects and reducing the drying efficiency of the drying line. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of a multi-layer drying line according to an embodiment of the present invention.

[0017] Figure 2 It is a side view of a multi-layer drying line according to an embodiment of the present invention.

[0018] Figure 3 It is a schematic diagram of a transport mechanism in a multi-layer drying line according to an embodiment of the present invention.

[0019] Figure 4 It is a top view of a multi-layer drying line according to an embodiment of the present invention.

[0020] In the figure, 1, drying box; 11, upper air duct; 12, drying channel; 13, lower air duct; 14, feed port; 15, discharge port; 16, transportation mechanism; 161, driving sprocket; 162, first chain; 163, second chain; 164, material tray; 17, first partition; 18, second partition;

[0021] 2. Drying unit; 21. First fan; 22. Heat sink; 23. First pipe;

[0022] 3. Second fan; 31. Heat exchanger; 32. Second pipe fitting. DETAILED DESCRIPTION

[0023] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0024] In the description of the present invention, it should be understood that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element. The terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0025] In the description of the present invention, it should be understood that the terms "height", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like used in the present invention to indicate the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0026] In the description of the present invention, it should be understood that the terms "first" and "second" are used in the present invention for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0027] like Figures 1 to 4As shown, the embodiment of the present invention preferably provides a multi-layer drying line, which includes a drying box 1 and a drying unit 2; a first cavity is arranged inside the drying box 1, and the first cavity includes an upper air duct 11, a drying channel 12 and a lower air duct 13 which are arranged in sequence from top to bottom and are interconnected; a feed port 14 and a discharge port 15 are arranged at one end of the drying channel 12, and the feed port 14 is arranged above the discharge port 15, and a transport mechanism 16 is arranged in the drying channel 12, and the transport mechanism 16 can transport the material from the feed port 14 to the discharge port 15; the drying unit 2 is arranged in the first cavity, and the number of the drying unit 2 There are multiple drying units 2, which are spaced apart along the length direction of the first cavity. Each drying unit 2 includes a first fan 21 and a heat sink 22. The first fan 21 is arranged above the drying box body 1. A first opening is arranged at one end of the upper air duct 11 close to the first fan 21, and the air outlet end of the first fan 21 is connected with the upper air duct 11 through the first opening; the heat sink 22 is arranged in the lower air duct 13, and a first pipe fitting 23 is also arranged in the lower air duct 13. The heat sink 22 is connected to the first pipe fitting 23, and the air outlet of the lower air duct 13 is connected with the air inlet end of the first fan 21 through the first pipe fitting 23.

[0028] Based on the above technical features, the present invention is provided with a plurality of drying units 2, and the plurality of drying units 2 are arranged at intervals along the length direction of the first cavity. Each drying unit 2 includes a first fan 21 and a heat sink 22. The first fan 21 is arranged above the drying box body 1, and a first opening is arranged at one end of the upper air duct 11 close to the first fan 21. The air outlet end of the first fan 21 is connected to the upper air duct 11 through the first opening. The first fan 21 can blow hot air into the upper air duct 11. After the first fan 21 is started, hot air is blown into the upper air duct 11, and the hot air passes through the drying channel 12 to dry the material, and the hot air is gradually blown out from the upper air duct 11. The upper layer descends to the lower layer, and the temperature of the hot air also decreases, and the humidity increases, becoming humid air, and then flows into the downwind duct 13. The heat sink 22 in the downwind duct 13 helps to convert the humid air into hot air. The hot air enters the first fan 21 through the first pipe 23 and enters the upper duct 11 again, so that the hot air forms a circulation in the upper duct 11, the drying channel 12 and the downwind duct 13, and continuously dries the material. At the same time, the transportation mechanism 16 transports the material from the feed port 14 to the discharge port 15. During the transportation, the material is in the drying channel 12 throughout the whole process to ensure that the material is fully dried in the drying channel 12.

[0029] As some embodiments of the present invention, Figure 1 to Figure 4As shown, the multi-layer drying line further includes a second fan 3, which is arranged above the upper air duct 11, and a second opening is arranged at one end of the upper air duct 11 close to the second fan 3, and the second fan 3 is connected to the upper air duct 11 through the second opening to control the balance of pressure and humidity in the first cavity. Through the arrangement of the second fan 3, the main function of the second fan 3 is to extract water vapor in the first cavity from the second opening, thereby adjusting the pressure and humidity in the first cavity. This helps to ensure the stability and uniformity of the environment during the drying process and improve the drying efficiency and quality.

[0030] As some embodiments of the present invention, Figure 1 to Figure 2 As shown, the second fan 3 also includes a heat exchanger 31 and a second pipe 32. The air inlet of the heat exchanger 31 is connected to the second opening for extracting water vapor in the first cavity. One end of the second pipe 32 is connected to the air outlet of the heat exchanger 31. The other end of the second pipe 32 is connected to the external environment for discharging water vapor. When the second fan 3 is started, it will extract the air in the first cavity through the second opening. The air contains a large amount of water vapor. After the extracted hot air enters the heat exchanger 31, it exchanges heat with the cooling medium. The water vapor is condensed into liquid water, and the air is cooled and dehumidified. The dehumidified air is discharged to the external environment through the second pipe 32.

[0031] As some embodiments of the present invention, Figure 3 As shown, the transport mechanism 16 includes a driving sprocket 161 and a first chain 162 and a second chain 163 extending along the length direction of the first cavity. The driving sprockets 161 are respectively arranged on both sides of the drying channel 12, and the first chain 162 and the second chain 163 are both arranged between the two driving sprockets 161. The rotation of the driving sprocket 161 drives the first chain 162 and the second chain 163 to move. The first chain 162 transports the material at the discharge port 15 to the drying channel 12, and the second chain 163 transports the material in the drying channel 12 to the discharge port 15. The driving sprockets 161 are respectively arranged on both sides of the drying channel 12, as the driving chain The rotation of the driving sprocket 161 drives the first chain 162 and the second chain 163 to move in the drying channel 12 through the chain transmission mechanism. The first chain 162 is responsible for transporting the material from the discharge port 15 to the drying channel 12; the second chain 163 is also arranged between the two driving sprockets 161 and extends parallel to the first chain 162. The second chain 163 is responsible for transporting the material in the drying channel 12 to the discharge port 15. During the drying process, the material moves along the drying channel 12 and finally reaches the position of the second chain 163, and is then transported to the discharge port 15 for collection or further processing.

[0032] As some embodiments of the present invention, Figure 3As shown, the number of the first chain 162 and the second chain 163 are both multiple, and the multiple first chains 162 are arranged at intervals along the width direction of the first cavity, and the multiple second chains 163 are arranged at intervals along the width direction of the first cavity. Through the arrangement of the multiple first chains 162 and the second chain 163, the material is evenly distributed to each first chain 162 at the discharge port 15. With the movement of the first chain 162, the material is gradually brought into the drying channel 12 and evenly distributed along the width direction. During the drying process, the material reciprocates in the drying channel 12 along the length direction of the drying channel 12, and when the dried material reaches the first cavity, it is evenly distributed to each second chain 163. With the movement of the second chain 163, the material is gradually transported to the discharge port 15 for collection or further processing. The drying effect of the material is effectively improved.

[0033] As some embodiments of the present invention, Figure 3 As shown, each first chain 162 and each second chain 163 are provided with a material tray 164 for placing materials, and the number of material trays 164 is multiple, and the multiple material trays 164 are arranged at intervals along the length direction of the first cavity. At the discharge port, the materials are hung one by one on the material trays 164 of the first chain 162. As the first chain 162 moves, the material trays 164 drive the materials into the drying channel 12. In the drying channel 12, the material trays 164 keep the materials in a stable suspension state, so that the materials can be evenly heated by hot air or other drying media. When the dried materials reach the second chain 163, they are hung one by one on the material trays 164 of the second chain 163, and are transported to the discharge port 15 as the second chain 163 moves.

[0034] As some embodiments of the present invention, Figure 1 As shown, the drying box 1 also includes a first partition 17 and a second partition 18. The first partition 17 is located between the upper air duct 11 and the drying channel 12, and the two ends of the first partition 17 are respectively connected to the inner wall of the drying box 1. The second partition 18 is located between the drying channel 12 and the lower air duct 13, and the two ends of the second partition 18 are respectively connected to the inner wall of the drying box 1. The main function of the first partition 17 is to isolate the upper air duct 11 and the drying channel 12 to prevent the hot air from being directly lost or affecting the drying effect before entering the drying channel 12. It ensures that the hot air can enter the drying channel 12 according to the predetermined path and speed, providing a uniform heating environment for the material. The main function of the second partition 18 is to ensure that the hot air fully contacts and exchanges heat with the material in the drying channel 12 before entering the lower air duct 13 according to the predetermined path.

[0035] As some embodiments of the present invention, Figure 1As shown, a third opening is provided at one end of the downwind duct 13 near the discharge port 15, and the third opening is connected to the external environment and is used to introduce external air into the downwind duct 13. By setting the third opening, the third opening allows external air to enter the downwind duct 13, which helps to improve the air circulation in the drying box 1 and reduce the possibility of internal air stagnation and accumulation. In some cases, the introduction of external air can be used to adjust the temperature in the drying box 1. For example, in the early stage of the drying process, when the temperature in the box is too high, the introduction of cooler external air can help lower the temperature; on the contrary, in the later stage of the drying process, if the temperature in the box is too low, the third opening can be reduced or closed to maintain the temperature.

[0036] As some embodiments of the present invention, Figure 1 to Figure 2 As shown, the first pipe fitting 23 is arranged outside the first cavity, and is used to guide the hot air in the downwind duct 13 into the first fan 21, and the hot air in the first fan 21 is transferred to the drying channel 12 through the upwind duct 11. The main function of the first pipe fitting 23 is to guide the hot air in the downwind duct 13 into the first fan 21. It plays a role in collecting and guiding hot air, ensuring that the hot air can smoothly enter the fan for pressurization and redistribution. At the same time, the first pipe fitting 23 is arranged outside the first cavity, but is connected to the inside of the downwind duct 13. This design allows the first pipe fitting 23 to collect and reuse the hot air in the downwind duct 13 without affecting the material drying operation in the drying channel 12.

[0037] In summary, the embodiment of the present invention provides a multi-layer drying line, which has the following beneficial effects compared with the prior art: a plurality of drying units 2 are arranged at intervals along the length direction of the first cavity, each drying unit 2 comprises a first fan 21 and a heat sink 22, the first fan 21 is arranged above the drying box body 1, and a first opening is arranged at one end of the upper air duct 11 close to the first fan 21, and the air outlet end of the first fan 21 is connected to the upper air duct 11 through the first opening, and the first fan 21 can blow hot air into the upper air duct 11. After the first fan 21 is started, hot air is blown into the upper air duct 11, and the hot air passes through the drying channel 12 to dry the material, and the hot air The air gradually descends from the upper layer to the lower layer, and the temperature of the hot air also decreases, and the humidity increases, becoming wet air, and then flows into the lower air duct 13. The heat sink 22 in the lower air duct 13 helps to convert the wet air into hot air. The hot air enters the first fan 21 through the first pipe 23, and enters the upper air duct 11 again, so that the hot air forms a cycle in the upper air duct 11, the drying channel 12 and the lower air duct 13, and continuously dries the material. At the same time, the transportation mechanism 16 transports the material from the feed port 14 to the discharge port 15. During the transportation, the material is in the drying channel 12 throughout the whole process to ensure that the material is fully dried in the drying channel 12. The present invention arranges a plurality of drying units 2 in the drying box 1, and each drying unit 2 can form an independent circulation drying system to ensure the uniformity of drying at each position in the drying box 1, which effectively solves the problem in the prior art that when the drying channel 12 is long, the efficiency of the radiator in processing wet air is limited, and the temperature of each part of the drying channel 12 is also different, resulting in inconsistent product drying effects and reducing the drying efficiency of the drying line.

[0038] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A multi-layer drying line, characterized in that: It includes a drying box and a drying unit; A first cavity is arranged inside the drying box, and the first cavity includes an upper air duct, a drying channel and a lower air duct which are arranged in sequence from top to bottom and are interconnected; A feed port and a discharge port are provided at one end of the drying channel, the feed port is provided above the discharge port, and a transport mechanism is provided in the drying channel, and the transport mechanism can transport the material from the feed port to the discharge port; The drying unit is arranged in the first cavity, and the number of the drying units is multiple, and the multiple drying units are arranged at intervals along the length direction of the first cavity, and each of the drying units includes a first fan and a heat sink, and the first fan is arranged above the drying box body, and a first opening is arranged at one end of the upper air duct close to the first fan, and the air outlet end of the first fan is connected to the upper air duct through the first opening; The heat sink is arranged in the downwind duct, a first pipe is also arranged in the downwind duct, the heat sink is connected to the first pipe, and the air outlet of the downwind duct is connected to the air inlet end of the first fan through the first pipe.

2. The multi-layer drying line according to claim 1, characterized in that: The multi-layer drying line also includes a second fan, which is arranged above the upper air duct, and a second opening is arranged at one end of the upper air duct close to the second fan, and the second fan is connected to the upper air duct through the second opening.

3. The multi-layer drying line according to claim 2, characterized in that: The second fan also includes a heat exchanger and a second pipe fitting, the air inlet of the heat exchanger is connected to the second opening for extracting water vapor in the first cavity, one end of the second pipe fitting is connected to the air outlet of the heat exchanger, and the other end of the second pipe fitting is connected to the external environment for discharging water vapor.

4. The multi-layer drying line according to claim 1, characterized in that: The transport mechanism includes a driving sprocket and a first chain and a second chain extending along the length direction of the first cavity, the driving sprockets are respectively arranged on both sides of the drying channel, the first chain and the second chain are both arranged between the two driving sprockets, and the rotation of the driving sprocket drives the first chain and the second chain to move, the first chain transports the material at the discharge port into the drying channel, and the second chain transports the material in the drying channel to the discharge port.

5. The multi-layer drying line according to claim 4, characterized in that: There are multiple first chains and multiple second chains, and the multiple first chains are arranged at intervals along the width direction of the first cavity, and the multiple second chains are arranged at intervals along the width direction of the first cavity.

6. The multi-layer drying line according to claim 5, characterized in that: Each of the first chains and each of the second chains is provided with a material tray for placing materials, and the number of the material trays is multiple, and the multiple material trays are arranged at intervals along the length direction of the first cavity.

7. The multi-layer drying line according to claim 1, characterized in that: The drying box also includes a first partition and a second partition. The first partition is located between the upper air duct and the drying channel, and the two ends of the first partition are respectively connected to the inner wall of the drying box. The second partition is located between the drying channel and the lower air duct, and the two ends of the second partition are respectively connected to the inner wall of the drying box. Both the first partition and the second partition are provided with through holes for gas circulation.

8. The multi-layer drying line according to claim 1, characterized in that: A third opening is provided at one end of the downwind duct close to the discharge port, and the third opening is communicated with the external environment and is used to introduce external air into the downwind duct.

9. The multi-layer drying line according to claim 8, characterized in that: The first pipe is arranged outside the first cavity, and is used to guide the hot air in the lower air duct into the first fan, and the hot air in the first fan is transferred to the drying channel through the upper air duct.

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