Single-layer penetrating type up-and-down hot circulating air tunnel dryer

Abstract

The utility model discloses a single-layer penetrating type up-and-down hot circulating air tunnel dryer, which belongs to the field of drying and comprises a drying chamber, a conveying screen is arranged in the drying chamber, and the width of the conveying screen is slightly smaller than that of the drying chamber. A uniform material distribution device is arranged at the position, close to an inlet of the drying chamber, of the conveying screen, and the uniform material distribution device can uniformly arrange materials on the conveying screen; the drying chamber is sequentially provided with a plurality of upper air blowing chambers and a lower air blowing chamber in the conveying direction of the conveying screen, air blowing openings of the upper air blowing chambers are formed below the conveying screen, and air blowing openings of the lower air blowing chambers are formed above the conveying screen. By means of the structure, the drying effect of materials on the conveying screen can be improved, and energy consumption is reduced.

Description

Technical Field

[0001] This utility model relates to the field of drying, specifically to a single-layer penetrating upper and lower hot air circulation tunnel dryer. Background Technology

[0002] Current dryers often use bottom-up airflow from the bottom of the conveyor screen to dry materials on the conveyor screen. However, due to the limited distribution of materials on the conveyor screen, the drying effect of hot air is not ideal when passing through a conveyor screen without materials.

[0003] In addition, the width of the air inlet channel on one side of the drying chamber is often the same as the length of the drying chamber. Hot air passing through the air inlet channel will not only waste some energy, but also reduce the air pressure, thereby reducing the drying effect.

[0004] To address the aforementioned problems, this invention designs and manufactures a single-layer penetrating upper and lower hot air circulation tunnel dryer to overcome the above-mentioned defects. Utility Model Content

[0005] To address the problems existing in the prior art, this utility model provides a single-layer penetrating upper and lower hot air circulation tunnel dryer, which can not only improve the drying effect of materials on the conveying screen, but also reduce energy consumption.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a single-layer penetrating upper and lower hot air circulation tunnel dryer, including a drying chamber, wherein a conveying screen is provided in the drying chamber, and the width of the conveying screen is slightly smaller than the width of the drying chamber;

[0007] A uniform material distribution device is installed on the conveyor screen near the entrance of the drying chamber, which can evenly distribute the material on the conveyor screen.

[0008] The drying chamber is provided with several upper air blowing chambers and one lower air blowing chamber in sequence along the conveying direction of the conveying screen. The air blowing port of the upper air blowing chamber is located below the conveying screen, and the air blowing port of the lower air blowing chamber is located above the conveying screen.

[0009] Preferably, the upper air-blowing chamber has a first vertical air inlet channel on at least one side, and a heating device is provided in the first vertical air inlet channel;

[0010] The bottom of the first vertical air inlet channel is connected to the air outlet of the upper air blowing chamber, and the top of the first vertical air inlet channel is provided with a first fan;

[0011] The top of the upper air blowing chamber is provided with a first air collecting hood, and the top of the first air collecting hood is provided with a first moisture exhaust fan.

[0012] Preferably, the lower air chamber has a second vertical air inlet channel on at least one side, and a heating device is also provided in the second vertical air inlet channel;

[0013] The bottom of the second vertical air inlet channel is connected to the air outlet of the lower air blowing chamber, and a second fan is provided at the top of the second vertical air inlet channel;

[0014] The bottom of the lower blowing chamber is provided with an air outlet on at least one side, the upper part of the lower blowing chamber is provided with an air collecting chamber, the top of the air collecting chamber is provided with a second air collecting hood, and the top of the second air collecting hood is provided with a second moisture exhaust fan;

[0015] The air outlet and the air collection chamber are connected by a vertical air outlet channel, which is located on both sides of the lower air blowing chamber.

[0016] Preferably, there are two vertical air outlet channels, which are respectively located on both sides of the second vertical air inlet channel.

[0017] Preferably, a partition is provided between the lower air blowing chamber and the air collecting chamber for isolation.

[0018] Preferably, the width of the first vertical air inlet channel is equal to the diameter of the air inlet at the first fan position;

[0019] The width of the second vertical air inlet channel is equal to the diameter of the air inlet at the second fan position.

[0020] Preferably, the air outlet of the upper air blowing chamber is located in the middle of one side of the upper air blowing chamber;

[0021] The air outlet of the lower air blowing chamber is located in the middle of one side of the lower air blowing chamber.

[0022] Preferably, the uniform material distribution device includes a swinging discharge port, which can evenly distribute the material onto the entire conveying screen.

[0023] Preferably, a scraper is provided at the bottom of the discharge port, and the distance between the bottom of the scraper and the conveying screen is slightly larger than the maximum size of the material.

[0024] The advantages of this utility model are:

[0025] 1. This utility model utilizes a uniform material distribution device at the inlet of the drying chamber to ensure that the material on the conveyor screen is evenly distributed. When hot air is blown out from the bottom of the upper blowing chamber, the material blocks the mesh of the conveyor screen, resulting in a greater overall pressure at the bottom of the screen than at the top. This ultimately blows the material off the screen, causing it to tumble continuously and thus improving the all-around drying effect. Furthermore, the lower blowing chamber at the outlet of the drying chamber allows for drying of the material's upper surface from above, further ensuring the overall drying effect.

[0026] 2. The width of the first vertical air inlet channel connected to the upper air blowing chamber in this utility model is not entirely set on one side of the upper air blowing chamber, but its width is equal to the diameter of the air inlet at the first fan position. By reducing the width of the first vertical air inlet channel, the entire circulation space of hot air is reduced, so that the hot air can be concentrated in the upper air blowing chamber, thereby reducing the loss of heat energy. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of a single-layer penetrating upper and lower hot air circulation tunnel dryer;

[0028] Figure 2 This is a side sectional view of the upper air blowing chamber of this utility model;

[0029] Figure 3 This is a side view of the lower air blowing chamber at the vertical air outlet channel position of this utility model;

[0030] Figure 4 This is a side view of the lower air blowing chamber at the location of the second vertical air inlet channel of this utility model.

[0031] In the diagram: 1. Conveying screen; 2. Upper blowing chamber; 3. Lower blowing chamber; 4. First vertical air inlet channel; 5. First fan; 6. First moisture exhaust fan; 7. First air collecting hood; 8. Air collecting chamber; 9. Second air collecting hood; 10. Second moisture exhaust fan; 11. Second vertical air inlet channel; 12. Second fan; 13. Vertical air outlet channel. Detailed Implementation

[0032] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0033] like Figures 1 to 4 As shown, a single-layer penetrating upper and lower hot air circulation tunnel dryer includes a drying chamber, in which a conveying screen 1 is provided. The width of the conveying screen 1 is slightly smaller than the width of the drying chamber to ensure that the airflow passing through the conveying screen 1 can completely cover the entire conveying screen 1.

[0034] A uniform material distribution device is installed on the conveyor screen 1 near the entrance of the drying chamber. The uniform material distribution device can evenly distribute the material on the conveyor screen 1. The uniform material distribution device specifically includes a swinging discharge port. The swinging discharge port can evenly spread the material onto the entire conveyor screen 1. Preferably, a scraper is provided at the bottom of the discharge port. The distance between the bottom of the scraper and the conveyor screen 1 is slightly larger than the maximum size of the material. Even if the material is not evenly distributed at the discharge port, the scraper can scrape the material evenly.

[0035] The drying chamber of this utility model is provided with several upper air blowing chambers 2 and one lower air blowing chamber 3 in sequence along the conveying direction of the conveying screen 1. The air blowing port of the upper air blowing chamber 2 is located below the conveying screen 1, and the air blowing port of the lower air blowing chamber 3 is located above the conveying screen 1.

[0036] In actual operation, the uniform material distribution device at the inlet of the drying chamber ensures that the material on the conveying screen 1 is evenly distributed. When hot air is blown out from the bottom of the upper blowing chamber 2, the material blocks the mesh of the conveying screen 1, resulting in a greater overall pressure at the bottom of the conveying screen 1 than at the top. This ultimately blows the material off the conveying screen 1, causing it to tumble continuously, thus improving the overall drying effect. Furthermore, the lower blowing chamber 3 at the outlet of the drying chamber allows for drying of the material's upper surface from above, further ensuring the overall drying effect.

[0037] Specifically, the upper air chamber 2 has at least one first vertical air inlet channel 4 on one side. The first vertical air inlet channel 4 is equipped with a heating device. The bottom of the first vertical air inlet channel 4 is connected to the air outlet of the upper air chamber 2. The top of the first vertical air inlet channel 4 is equipped with a first fan 5. The width of the first vertical air inlet channel 4 is equal to the diameter of the air inlet at the position of the first fan 5. By reducing the width of the first vertical air inlet channel 4, the entire circulation space of hot air is reduced, so that the hot air can be concentrated in the upper air chamber 2, thereby reducing the loss of heat energy.

[0038] The top of the upper air chamber 2 is equipped with a first air collecting hood 7, and the top of the first air collecting hood 7 is equipped with a first moisture exhaust fan 6, thereby ensuring the rapid discharge of moisture.

[0039] The present invention provides a second vertical air inlet channel 11 on at least one side of the lower air inlet chamber 3, and a heating device is also provided in the second vertical air inlet channel 11. The bottom of the second vertical air inlet channel 11 is connected to the air outlet of the lower air inlet chamber 3, and a second fan 12 is provided at the top of the second vertical air inlet channel 11. The width of the second vertical air inlet channel 11 is equal to the diameter of the air inlet at the position of the second fan 12. An air outlet is provided on at least one side of the bottom of the lower air inlet chamber 3. An air collecting chamber 8 is provided above the lower air inlet chamber 3. A partition is provided between the lower air inlet chamber 3 and the air collecting chamber 8. A second air collecting hood 9 is provided at the top of the air collecting chamber 8, and a second moisture exhaust fan 10 is provided at the top of the second air collecting hood 9.

[0040] The air outlet and the air collection chamber 8 are connected by a vertical air outlet channel 13. The vertical air outlet channel 13 is set on both sides of the lower air blowing chamber 3. Preferably, there are two vertical air outlet channels 13. The two vertical air outlet channels 13 are respectively set on both sides of the second vertical air inlet channel 11 to ensure the normal and rapid discharge of moisture.

[0041] The air outlet of the upper air chamber 2 is preferably located in the middle of one side of the upper air chamber 2, and the air outlet of the lower air chamber 3 is located in the middle of one side of the lower air chamber 3, so as to ensure that the air outlet positions make the temperature distribution of the upper air chamber 2 and the lower air chamber 3 more uniform.

[0042] It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. Furthermore, it should be understood that after reading the technical description of this utility model, those skilled in the art can make various alterations, modifications, and / or variations to this utility model, and all such equivalent forms also fall within the scope of protection defined by the appended claims.

Claims

1. A single-layer penetrating upper and lower hot air circulating tunnel dryer, characterized in that, Includes a drying chamber, wherein a conveying screen (1) is provided in the drying chamber, the width of which is slightly smaller than the width of the drying chamber; A uniform material distribution device is provided on the conveying screen (1) near the entrance of the drying chamber. The uniform material distribution device can evenly distribute the material on the conveying screen (1). The drying chamber is provided with several upper air blowing chambers (2) and a lower air blowing chamber (3) in sequence along the conveying direction of the conveying screen (1). The air blowing port of the upper air blowing chamber (2) is located below the conveying screen (1), and the air blowing port of the lower air blowing chamber (3) is located above the conveying screen (1).

2. The single-layer penetrating upper and lower hot air circulating tunnel dryer according to claim 1, characterized in that, The upper air chamber (2) has a first vertical air inlet channel (4) on at least one side, and a heating device is provided in the first vertical air inlet channel (4); The bottom of the first vertical air inlet channel (4) is connected to the air outlet of the upper air blowing chamber (2), and the top of the first vertical air inlet channel (4) is provided with a first fan (5). The top of the upper air chamber (2) is provided with a first air collecting hood (7), and the top of the first air collecting hood (7) is provided with a first moisture exhaust fan (6).

3. A single-layer penetrating upper and lower hot air circulating tunnel dryer according to claim 2, characterized in that, The lower air chamber (3) is provided with a second vertical air inlet channel (11) on at least one side, and a heating device is also provided in the second vertical air inlet channel (11); The bottom of the second vertical air inlet channel (11) is connected to the air outlet of the lower air blowing chamber (3), and the top of the second vertical air inlet channel (11) is provided with a second fan (12). The bottom of the lower blowing chamber (3) is provided with an air outlet on at least one side, and an air collecting chamber (8) is provided above the lower blowing chamber (3). A second air collecting hood (9) is provided on the top of the air collecting chamber (8), and a second moisture exhaust fan (10) is provided on the top of the second air collecting hood (9). The air outlet and the air collection chamber (8) are connected by a vertical air outlet channel (13), which is located on both sides of the lower air blowing chamber (3).

4. A single-layer penetrating upper and lower hot air circulating tunnel dryer according to claim 3, characterized in that, The vertical air outlet channel (13) is provided in two sections, and the two vertical air outlet channels (13) are respectively located on both sides of the second vertical air inlet channel (11).

5. A single-layer penetrating upper and lower hot air circulating tunnel dryer according to claim 1, characterized in that, A partition is provided between the lower blowing chamber (3) and the air collecting chamber (8).

6. A single-layer penetrating upper and lower hot air circulating tunnel dryer according to claim 3, characterized in that, The width of the first vertical air inlet channel (4) is equal to the diameter of the air inlet at the position of the first fan (5); The width of the second vertical air inlet channel (11) is equal to the diameter of the air inlet at the position of the second fan (12).

7. A single-layer penetrating upper and lower hot air circulating tunnel dryer according to claim 1, characterized in that, The air outlet of the upper air blowing chamber (2) is located in the middle of one side of the upper air blowing chamber (2); The air outlet of the lower air chamber (3) is located in the middle of one side of the lower air chamber (3).

8. A single-layer penetrating upper and lower hot air circulating tunnel dryer according to claim 1, characterized in that, The uniform material distribution device includes a swinging discharge port, which can evenly distribute the material onto the entire conveying screen (1).

9. A single-layer penetrating upper and lower hot air circulating tunnel dryer according to claim 8, characterized in that, The bottom of the discharge port is provided with a scraper, and the distance between the bottom of the scraper and the conveying screen (1) is slightly greater than the maximum size of the material.

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