Energy-saving and environment-friendly drying device of coated white board paper coating machine

Abstract

The utility model relates to the technical field of coated white board production equipment, in particular to an energy-saving and environment-friendly drying device of a coated white board coating machine. According to the technical scheme, the device comprises a belt conveyor, a drying cover is installed on the upper surface of the belt conveyor, a heat exchange box is installed on the upper surface of the drying cover, a wavy heat exchange plate is installed in the heat exchange box, and an induced draft fan and an air heater are installed at the positions, located on the two sides of the heat exchange box, of the upper surface of the drying cover correspondingly; the output end and the input end of the air heater are connected to the outer surface of the drying cover and the side, away from the induced draft fan, of the upper surface of the heat exchange box correspondingly, the output end and the input end of the induced draft fan are connected to the upper surface of the drying cover and the side, away from the air heater, of the outer surface of the heat exchange box correspondingly, and an air outlet pipe is connected to the side, away from the induced draft fan, of the heat exchange box. According to the device, heat in the drying tail gas of the coated white board can be recycled, energy conservation and environmental protection are facilitated, and the production cost is reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of coated whiteboard paper production equipment, specifically an energy-saving and environmentally friendly drying device for a coated whiteboard paper coating machine. Background Technology

[0002] Coated white cardboard is a type of paperboard made by coating a base paperboard with white paint using a coating machine, followed by drying and other finishing processes. It has advantages such as high brightness, high smoothness, excellent ink absorption, high printing gloss, and high folding endurance, and is therefore widely used in the field of packaging box printing.

[0003] Currently, after coating the whiteboard paper with paint using a coating machine, the paint is dried by a drying device. However, the exhaust gas emitted by the existing drying device contains a large amount of residual heat that cannot be recovered and utilized, resulting in a significant waste of heat energy and hindering energy conservation and environmental protection. Therefore, we propose an energy-saving and environmentally friendly drying device for whiteboard paper coating machines. Utility Model Content

[0004] The purpose of this utility model is to provide an energy-saving and environmentally friendly drying device for a whiteboard paper coating machine. It has the advantages of being able to recover and utilize the heat in the exhaust gas of whiteboard paper drying, which is beneficial to energy conservation and environmental protection, and reduces production costs. It solves the problem that the exhaust gas discharged by the drying device in the existing whiteboard paper coating machine contains a large amount of residual heat that cannot be recovered and utilized, resulting in a large amount of heat energy waste, which is not conducive to energy conservation and environmental protection.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an energy-saving and environmentally friendly drying device for a whiteboard paper coating machine, comprising a belt conveyor, a drying hood installed on the upper surface of the belt conveyor, a heat exchange box installed on the upper surface of the drying hood, a corrugated heat exchange plate installed inside the heat exchange box, an induced draft fan and a hot air fan respectively installed on both sides of the upper surface of the drying hood located on the heat exchange box, the output end and input end of the hot air fan respectively connected to the outer surface of the drying hood and the upper surface of the heat exchange box on the side away from the induced draft fan, the output end and input end of the induced draft fan respectively connected to the upper surface of the drying hood and the outer surface of the heat exchange box on the side away from the hot air fan, an air outlet pipe connected to the side of the heat exchange box away from the induced draft fan, and an air inlet provided on the side of the upper surface of the heat exchange box away from the hot air fan.

[0006] Preferably, the outer surface of the drying hood is provided with a heat insulation layer.

[0007] Preferably, a number of inclined air guide plates are installed at equal intervals inside the drying hood.

[0008] Preferably, a support frame is installed on the lower surface of the belt conveyor.

[0009] Preferably, a filter duct is installed on the upper surface of the heat exchange box above the air inlet. The upper surface of the filter duct has through slots near the front and rear surfaces. A filter frame is installed inside the filter duct, and a dust filter is installed inside the filter frame. The front and rear surfaces of the filter frame are provided with protrusions, and the two protrusions are located inside the two through slots respectively.

[0010] Preferably, a sealing strip is installed on the inner wall of the air filter duct below the filter screen frame.

[0011] Preferably, a drain valve is connected to the outer surface of the heat exchange box near the lower surface.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. This utility model, by setting up a belt conveyor, drying hood, heat exchange box, corrugated heat exchange plate, induced draft fan, hot air fan, air outlet pipe, and air inlet, achieves the effect of recovering and utilizing the heat in the exhaust gas from the drying of coated white board paper, which is beneficial to energy conservation and environmental protection, and reduces production costs. After the coated white board paper is coated by the coating machine, it is conveyed to the belt conveyor and enters the drying hood. The induced draft fan moves it towards the hot air fan, which delivers drying hot air into the drying hood. The drying hot air flows towards the induced draft fan inside the drying hood, and the flowing drying hot air causes the belt conveyor to... The coated whiteboard paper is dried, and the drying exhaust gas inside the drying hood is transported to the heat exchange box by an induced draft fan. The corrugated heat exchange plate divides the heat exchange box into upper and lower chambers. The drying exhaust gas flows below the corrugated heat exchange plate, while the outside cold air enters the heat exchange box through the air inlet and is located above the corrugated heat exchange plate. The drying exhaust gas and the cold air exchange heat through the corrugated heat exchange plate. After being heated, the cold air enters the hot air fan to achieve the purpose of recovering and utilizing the waste heat of the drying exhaust gas. The water vapor in the drying exhaust gas liquefies after encountering the cold air and is collected at the bottom of the heat exchange box.

[0014] 2. This utility model achieves the effect of improving the drying efficiency of coated whiteboard paper by setting an inclined air guide plate. When the drying hot air flows inside the drying hood, it is guided by the inclined air guide plate to flow downward and fully contact the coated whiteboard paper on the belt conveyor.

[0015] 3. This utility model achieves the effect of facilitating the disassembly and cleaning of the dust filter through the air filter pipe, filter frame, through slot, protrusion, and dust filter. When the cold air from the outside passes through the dust filter, dust and impurities are filtered out. When disassembling and cleaning the dust filter, the protrusion can be moved out of the through slot or inserted into the through slot to complete the disassembly and cleaning of the filter frame and dust filter. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a partial three-dimensional structural diagram of the drying hood of this utility model;

[0018] Figure 3 This is a partial three-dimensional structural diagram of the filter tube of this utility model;

[0019] Figure 4 This is a partial three-dimensional structural diagram of the heat exchange box of this utility model.

[0020] Reference numerals: 1. Support frame; 2. Belt conveyor; 3. Drying hood; 4. Exhaust fan; 5. Air filter duct; 6. Heat exchange box; 7. Hot air blower; 8. Air outlet duct; 9. Insulation layer; 10. Drain valve; 11. Inclined air guide plate; 12. Sealing strip; 13. Protrusion; 14. Through slot; 15. Filter screen frame; 16. Dust filter screen; 17. Air inlet; 18. Corrugated heat exchange plate. Detailed Implementation

[0021] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0022] Example 1

[0023] like Figure 1 , Figure 2 and Figure 4As shown, this utility model proposes an energy-saving and environmentally friendly drying device for a white cardboard coating machine, including a belt conveyor 2. A support frame 1 is installed on the lower surface of the belt conveyor 2. The white cardboard to be coated is conveyed onto the belt conveyor 2 after being coated by the coating machine. A drying hood 3 is installed on the upper surface of the belt conveyor 2. The drying hood 3 is hollow inside and open on the lower surface. An insulation layer 9 is provided on the outer surface of the drying hood 3, which serves to keep the drying hood 3 warm and reduce heat loss inside the drying hood 3. A heat exchange box 6 is installed on the upper surface of the drying hood 3. A corrugated heat exchange plate 18 is installed inside the heat exchange box 6, which divides the interior of the heat exchange box 6 into upper and lower chambers. An induced draft fan 4 and a hot air fan 7 are respectively installed on both sides of the heat exchange box 6 on the upper surface of the drying hood 3. The hot air fan 7 has an output end and an input end. The output and input ends of the blower 4 are respectively connected to the outer surface of the drying hood 3 and the upper surface of the heat exchange box 6 on the side away from the blower 4. Several inclined air guide plates 11 are installed at equal intervals inside the drying hood 3. When the drying hot air flows inside the drying hood 3, it is guided by the inclined air guide plates 11 to flow downward and make full contact with the coated white board paper on the belt conveyor 2, thereby improving the drying efficiency of the coated white board paper. The output end and input end of the blower 4 are respectively connected to the upper surface of the drying hood 3 and the outer surface of the heat exchange box 6 on the side away from the hot air blower 7. The side of the heat exchange box 6 away from the blower 4 is connected to the air outlet pipe 8. The upper surface of the heat exchange box 6 is provided with the air inlet 17 on the side away from the hot air blower 7. The drain valve 10 is connected to the lower surface of the outer surface of the heat exchange box 6. The condensate collected at the bottom of the heat exchange box 6 is discharged through the drain valve 10.

[0024] In use, after the coated white board paper is coated by the coating machine, it is conveyed onto the belt conveyor 2 and enters the drying hood 3. The induced draft fan 4 moves it towards the hot air fan 7, which in turn delivers drying hot air into the drying hood 3. This hot air flows towards the induced draft fan 4 within the drying hood 3, drying the coated white board paper on the belt conveyor 2. The drying exhaust gas inside the drying hood 3 is then transported by the induced draft fan 4 to the heat exchange box 6, where the corrugated heat exchange plate 18 heats the heat exchange box 6. The interior is divided into upper and lower chambers. The drying exhaust gas flows below the corrugated heat exchange plate 18, while the outside cold air enters the heat exchange box 6 through the air inlet 17 and is located above the corrugated heat exchange plate 18. The drying exhaust gas and the cold air exchange heat through the corrugated heat exchange plate 18. After being heated, the cold air enters the hot air blower 7 to achieve the purpose of recovering and utilizing the waste heat of the drying exhaust gas. The water vapor in the drying exhaust gas liquefies after encountering the cold and is collected at the bottom of the heat exchange box 6 and discharged through the drain valve 10.

[0025] Example 2

[0026] like Figure 1 , Figure 3 and Figure 4As shown, the present invention proposes an energy-saving and environmentally friendly drying device for a whiteboard paper coating machine. Compared with Embodiment 1, this embodiment further includes a filter pipe 5 installed on the upper surface of the heat exchange box 6 above the air inlet 17. The filter pipe 5 has through slots 14 near the front and rear surfaces. A filter frame 15 is installed inside the filter pipe 5, and a dust filter 16 is installed inside the filter frame 15. The front and rear surfaces of the filter frame 15 are provided with protrusions 13, and the two protrusions 13 are located inside the two through slots 14 respectively. A sealing strip 12 is installed on the inner wall of the filter pipe 5 below the filter frame 15. The sealing strip 12 seals the gap between the filter frame 15 and the filter pipe 5 and also supports the filter frame 15.

[0027] In this embodiment, when the cold air from the outside passes through the dust filter 16, dust and impurities are filtered out. When disassembling and cleaning the dust filter 16, the filter frame 15 and the dust filter 16 can be disassembled and assembled by moving the protrusion 13 out of the through slot 14 or inserting the protrusion 13 into the through slot 14.

[0028] The above specific embodiments are merely several preferred embodiments of this utility model. Based on the technical solution of this utility model and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A kind of energy-saving and environment-friendly drying device of coated whiteboard coating machine, including belt conveyor (2), it is characterized by: The surface of the belt conveyor (2) is mounted with a drying cover (3), the upper surface of the drying cover (3) is mounted with a heat exchange box (6), the inside of the heat exchange box (6) is mounted with a wave-shaped heat exchange plate (18), the upper surface of the drying cover (3) is mounted with an air guide fan (4) and a hot air fan (7) at both sides of the heat exchange box (6), the output end and the input end of the hot air fan (7) are connected to the outer surface of the drying cover (3) and the upper surface of the heat exchange box (6) away from the air guide fan (4), the output end and the input end of the air guide fan (4) are connected to the upper surface of the drying cover (3) and the outer surface of the heat exchange box (6) away from the hot air fan (7), the side of the heat exchange box (6) away from the air guide fan (4) is connected with an air outlet pipe (8), and the upper surface of the heat exchange box (6) away from the hot air fan (7) is provided with an air inlet (17).

2. The energy-saving and environment-friendly drying device for a coating machine of coated white board paper according to claim 1, characterized in that: The outer surface of the drying cover (3) is provided with a heat preservation layer (9).

3. The energy-saving and environment-friendly drying device for a coating machine of coated white board paper according to claim 1, characterized in that: A plurality of inclined air guide plates (11) are mounted equidistantly inside the drying cover (3).

4. The energy-saving and environment-friendly drying device for a coating machine of coated white board paper according to claim 1, characterized in that: The lower surface of the belt conveyor (2) is mounted with a support frame (1).

5. The energy-saving and environment-friendly drying device for a coating machine of coated white board paper according to claim 1, characterized in that: The upper surface of the heat exchange box (6) is mounted with a filter pipe (5) above the air inlet (17), the upper surface of the filter pipe (5) is provided with penetrating clamps (14) near the front surface and the rear surface, the inside of the filter pipe (5) is provided with a filter screen frame (15), the inside of the filter screen frame (15) is provided with a dust filter screen (16), the front surface and the rear surface of the filter screen frame (15) are provided with protruding blocks (13), and the two protruding blocks (13) are located inside the two penetrating clamps (14) respectively.

6. The energy-saving and environment-friendly drying device for a coating machine of coated white board paper according to claim 5, characterized in that: The inner wall of the filter pipe (5) is mounted with a sealing strip (12) below the filter screen frame (15).

7. The energy-saving and environment-friendly drying device for a coating machine of coated white board paper according to claim 1, characterized in that: The outer surface of the heat exchange box (6) is connected with a drain valve (10) near the lower surface. The outer surface of the heat exchange box (6) is connected with a drain valve (10) near the lower surface.

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