Energy-saving rotary screen dryer

Abstract

The utility model relates to the technical field of drying machines, in particular to an energy-saving rotary screen drying machine which comprises a drying shell and is characterized in that a first partition plate and a second partition plate are arranged in the drying shell, a rack is arranged on one side of the first partition plate, a first rotating shaft is arranged on one side of the rack, and four evenly-distributed screen partition plates are rotationally connected to one end of the first rotating shaft; and the outer sides of the net partition plates are each provided with a rotary net piece, spunlace cloth is wound between the rotary net pieces, two third partition plates which are symmetrically distributed are arranged between the second partition plate and the first partition plate, and a first air pipe is arranged in the middle of the second partition plate in a penetrating mode. Energy consumption is reduced, the whole drying process is more energy-saving, and the requirements for energy conservation and emission reduction in modern industrial production are met; and efficient circulation and exchange of hot air and moisture in the drying shell are achieved through the synergistic effect of the first air pipe, the first vent groove, the air supplementing opening and other structures.

Description

Technical Field

[0001] This invention relates to the field of dryer technology, and in particular to an energy-saving rotary screen dryer. Background Technology

[0002] Spunlace nonwoven fabric is produced by spraying high-pressure micro-water jets onto one or more layers of fiber webs, causing the fibers to entangle and thus strengthening the web to a certain strength. The resulting fabric is spunlace nonwoven fabric. A rotary dryer is a key piece of equipment in a spunlace nonwoven fabric production line, primarily used to dry and evaporate the moisture in the spunlace nonwoven fabric, ensuring the moisture content reaches a certain ratio and removing excess water. Traditional rotary dryers use a fan and heating unit to dry the spunlace fabric with hot air. Moisture from the dried air is removed by an external exhaust fan through internal piping. However, during operation, the exhaust port is placed in the positive pressure area of ​​the fan outlet, reducing the air pressure and volume in the positive pressure area. This hinders the penetration of hot air into the drying process, resulting in significant energy waste. Therefore, we propose a new rotary dryer.

[0003] Chinese patent disclosure number (CN 214747108 U) discloses a rotary screen dryer comprising a first drying chamber and a second drying chamber with identical structures. An opening machine is installed between the first and second drying chambers. The output end of the first drying chamber is connected to the input end of the opening machine, and the output end of the opening machine is connected to the output end of the second drying chamber. A cotton feeding device is installed at the input end of the first drying chamber. However, this rotary screen dryer has several drawbacks: the exhaust port is located in the positive pressure area of ​​the fan outlet, affecting the air pressure and air volume in that area; the hot air penetration effect is poor; due to the location of the exhaust port, it is not conducive to the hot air penetration and drying of spunlace nonwoven fabrics; and energy is wasted; during the drying process of spunlace fabric, the poor hot air penetration effect leads to a lot of energy waste. Therefore, an energy-saving rotary screen dryer is needed. Summary of the Invention

[0004] The purpose of this invention is to overcome the existing defects and provide an energy-saving rotary screen dryer. This device adopts a negative pressure chamber structure and a fabric outlet side air supply method, which will not interfere with the air volume and air pressure in the positive pressure zone of the device. The temperature uniformity requirement in the working width direction can reach a temperature difference within 5 degrees. In this way, the rotary screen temperature process setting is more economical and reasonable. Compared with traditional rotary screen dryers, the energy saving effect can reach more than 20%, which can effectively solve the problems in the background technology and thus provide an energy-saving rotary screen dryer.

[0005] The technical solution adopted by the present invention to solve its technical problem is: an energy-saving circular mesh dryer, including a drying shell, characterized in that: the drying shell is provided with a partition 1 and a partition 2 inside, a frame is provided on one side of the partition 1, a rotating shaft is provided on one side of the frame, and four evenly distributed mesh partitions are rotatably connected to one end of the rotating shaft 1, circular mesh components are provided on the outer side of each mesh partition, and spunlace fabric is wound between the circular mesh components, two symmetrically distributed partitions 3 are provided between the partition 2 and the partition 1, an air pipe 1 is provided through the middle of the partition 2, and ventilation slots 1 are provided at the upper and lower ends of the partition 2 and the upper and lower ends of the partition 1, and an upper air equalizing plate and a lower air equalizing plate are provided from top to bottom between the partition 1 and the right wall of the drying shell, and the surfaces of the upper air equalizing plate and the lower air equalizing plate are provided with turbulence structures. The combination of partitions, frame, rotating shaft, mesh partitions, circular mesh components, and spunlace fabric achieves effective support and uniform drying of the material. Wrapped in spunlace fabric, the material has a large heating area and evaporates moisture quickly. The rotation of the mesh partitions continuously agitates the material, preventing localized overheating or incomplete drying, thus improving drying quality and efficiency. The gas flow channels formed by the air duct and ventilation slot allow for efficient circulation of hot air within the drying chamber, uniformly providing heat to all parts of the material, reducing heat waste and energy consumption. The design of the upper and lower air distribution plates and their turbulence structure ensures that the airflow acts evenly on the material, further improving drying uniformity and making the dried material quality more stable, reducing the production of defective products due to uneven drying.

[0006] Preferably, heat insulation panels are installed at both the upper and lower ends of the right wall of the drying shell, and the heat insulation panels are made of multi-layer composite material. The multi-layer composite heat insulation panels have good heat insulation performance, which can effectively reduce the loss of heat from the inside of the drying shell to the outside, ensure that the drying process is carried out in a relatively stable high-temperature environment, reduce energy consumption, and also avoid the risk of operators being burned by accidentally touching the shell, thus improving the safety of equipment use.

[0007] Preferably, the rear wall of the drying shell is provided with a moisture exhaust port, which is respectively installed in conjunction with partition plate one, partition plate two, and partition plate three. During the drying process, the moisture in the material will be released in the form of water vapor. The moisture exhaust port can promptly remove this moisture from the drying shell, keeping the internal air dry and facilitating the continuous evaporation of moisture from the material, thus improving drying efficiency. At the same time, the installation of the moisture exhaust port in conjunction with the three partition plates makes the moisture discharge smoother and more uniform, preventing localized moisture accumulation and further ensuring the uniformity of the drying effect.

[0008] Preferably, a fan is located in the middle of the left wall of the drying shell, and the input end of the fan is electrically connected to the output end of an external microcontroller. By controlling the fan's operation through the external microcontroller, the air speed and volume can be precisely adjusted according to the actual needs of the drying process. In the initial stage of drying, a larger air volume may be needed to quickly remove moisture from the material surface; as drying progresses, appropriately reducing the air volume can prevent the material from being excessively agitated, thus affecting the drying effect. This precise control method helps to achieve a more efficient and stable drying process, improving the equipment's intelligence and drying quality.

[0009] Preferably, a burner is installed through the lower left wall of the drying shell. The input end of the burner is electrically connected to the output end of an external microcontroller, and one end of the burner's air outlet is equipped with a combustion air duct and connected to a gas pipe. The hot airflow generated by the burner enters the gas pipe through the combustion air duct, providing a stable heat source for the drying shell. This direct heating method can quickly raise the temperature inside the drying shell, shorten the preheating time, and improve drying efficiency. At the same time, through the connection with the gas pipe, the hot airflow can be evenly distributed inside the drying shell, ensuring that the material in all parts receives sufficient heat supply, further improving the uniformity of the drying effect.

[0010] Preferably, an air inlet is provided at the upper end of the front wall of the drying shell. During the drying process, the air pressure and gas composition inside the drying shell may change due to the discharge of moisture from the exhaust port and possible slight air leakage. The air inlet allows fresh air from outside to be introduced into the drying shell in a timely manner, maintaining stable internal air pressure and ensuring normal gas circulation and heat transfer. At the same time, the introduction of fresh air also helps to dilute the internal moisture concentration, further improving the dehumidification effect and promoting the smooth progress of the drying process.

[0011] Preferred:

[0012] (1) First, the spunlace fabric is tightly and evenly interwoven around the outside of the round mesh in a specific manner to build a good foundation for the subsequent drying process; then the burner is preheated by precisely controlling the fuel supply and air mixing ratio inside the burner to ensure that the fuel is fully mixed and ready for combustion and heating, thus laying the foundation for the subsequent generation of high-temperature hot airflow.

[0013] (2) After the fuel and air in the burner are fully mixed, the combustion program is started. During the combustion process, a large amount of heat energy is released and the temperature continues to rise, thereby generating a high-temperature hot airflow. The generated high-temperature hot airflow flows into the gas pipe in an orderly and stable manner along a specific combustion air duct. During this transmission process, the flow rate and direction of the hot air are precisely controlled to achieve efficient heating of the drying gas.

[0014] (3) Start the fan. The powerful airflow generated by its operation pushes the hot air in the air pipe one through the upper and lower ends of the left side of the partition two, and enters the upper air distribution plate and the lower air distribution plate through the ventilation slot one. The surfaces of the upper and lower air distribution plates are evenly distributed with carefully designed air holes. When the hot air passes through these air holes, it is dispersed into a stable laminar flow state. This air distribution treatment can ensure that the hot air acts evenly on all parts of the spunlace fabric in the device, avoiding local overheating or uneven drying. The evenly distributed hot air is in full contact with the spunlace fabric, and the heat is transferred from the hot air to the spunlace fabric, causing the moisture in it to gradually evaporate. During the movement of the spunlace fabric, it drives the circular mesh to rotate adaptively around the axis of the corresponding rotating shaft one through the contact friction between itself and the circular mesh.

[0015] (4) The dried gas, carrying the water vapor separated from the spunlace fabric, passes through the ventilation slot 2 in the middle of partition 1 and enters the negative pressure chamber formed by partitions 1, 2, and 3. Since the temperature of the humid air in the negative pressure chamber is low and the moisture content is high, it is the optimal location for dehumidification. The dehumidification pipe is set in this negative pressure chamber, and the heat carried by the dehumidified gas is recovered and utilized in the negative pressure chamber. The hot air penetrates the heated spunlace fabric and enters the inside of the circular mesh, becoming humid and hot air with a higher moisture content. It then enters the negative pressure chamber through the circular mesh. Then, it is drawn away by the fan for reheating. The heated hot air circulates continuously to dry the spunlace nonwoven fabric entering the dryer.

[0016] (5) The air supply port provides air supply to the inside of the device. The direction of the air supply is opposite to the direction of the spunlace fabric conveying. While the device is gradually heated, the air supply can reduce the surface temperature of the spunlace fabric after effective drying, making it easier to control the moisture content of the fabric. The heat insulation layer provides heat insulation and heat preservation treatment to the inside of the device, further reducing energy consumption.

[0017] The advantages of this invention are:

[0018] This application effectively blocks heat transfer by using a multi-layer composite insulation layer, reducing energy consumption and making the entire drying process more energy-efficient, meeting the requirements for energy conservation and emission reduction in modern industrial production. Through the synergistic effect of air pipes, ventilation slots, and air inlets, efficient circulation and exchange of hot air and moisture within the drying shell are achieved, reducing heat waste, further improving drying efficiency, shortening drying time, and increasing production efficiency. The insulation layer not only provides insulation but also reduces the shell temperature, preventing accidental burns to operators and improving equipment safety. Meanwhile, the fan is connected to an external microcontroller, enabling remote control and precise adjustment of wind speed and volume, reducing the intensity of manual operation and making equipment operation and management more convenient and efficient. The connection structure between the burner and the gas pipe allows hot air to enter the drying shell stably, reducing potential safety hazards caused by unstable heat sources and facilitating operators to precisely control the heat source supply according to drying needs. The setting of the exhaust port can be adjusted according to different environmental humidity and drying process requirements, ensuring effective moisture discharge under various operating conditions and maintaining a suitable humidity environment inside the drying shell. This allows the equipment to operate stably under different climatic conditions and production sites, demonstrating strong environmental adaptability. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Please see Figure 1-2 As shown:

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 This is a schematic cross-sectional view of the right side of this utility model.

[0023] In the diagram: 1. Drying shell; 2. Partition 1; 3. Partition 2; 4. Partition 3; 5. Frame; 6. Shaft 1; 7. Mesh partition; 8. Round mesh component; 9. Spunlace fabric; 10. Lower air distribution plate; 11. Upper air distribution plate; 12. Insulation layer; 13. Air duct 1; 14. Exhaust port; 15. Fan; 16. Burner; 17. Combustion air duct; 18. Make-up air port. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] Example

[0026] Please see Figure 1-2 As shown:

[0027] Example: An energy-saving circular mesh dryer includes a drying shell 1, characterized in that: the drying shell 1 is provided with a partition 2 and a partition 3 inside; a frame 5 is provided on one side of the partition 2; a rotating shaft 6 is provided on one side of the frame 5; four evenly distributed mesh partitions 7 are rotatably connected to one end of the rotating shaft 6; circular mesh pieces 8 are provided on the outer side of each mesh partition 7; spunlace fabric 9 is wound between the circular mesh pieces 8; two symmetrically distributed partitions 4 are provided between the partition 3 and the partition 2; an air pipe 13 is provided through the middle of the partition 3; ventilation slots are provided at the upper and lower ends of the partition 3 and the upper and lower ends of the partition 2; an upper air distribution plate 11 and a lower air distribution plate 10 are provided from top to bottom between the partition 2 and the right wall of the drying shell 1; the surfaces of the upper air distribution plate 11 and the lower air distribution plate 10 are provided with turbulence structures. The combination of partitions, frame 5, rotating shaft, mesh partition 7, circular mesh 8, and spunlace fabric 9 achieves effective support and uniform drying of the material. Under the wrapping of spunlace fabric 9, the material has a large heating area and the moisture evaporates quickly. The rotation of mesh partition 7 can make the material constantly turn over, avoiding local overheating or incomplete drying, thus improving drying quality and efficiency. The gas flow channel formed by air pipe 13 and air vent 1 allows hot air to circulate efficiently in the drying shell 1, evenly providing heat to the material in all parts, reducing heat waste and energy consumption. The design of the upper air distribution plate 11 and lower air distribution plate 10 and their turbulence structure ensures that the airflow acts evenly on the material, further improving the uniformity of drying, making the quality of the dried material more stable, and reducing the generation of defective products due to uneven drying.

[0028] In this embodiment, heat insulation plates 12 are installed at both the upper and lower ends of the right wall of the drying shell 1. The heat insulation plates 12 are made of multi-layer composite material. The multi-layer composite heat insulation plates 12 have good heat insulation performance, which can effectively reduce the loss of heat from the inside of the drying shell 1 to the outside, ensuring that the drying process is carried out in a relatively stable high-temperature environment, reducing energy consumption, and also avoiding the risk of burns to operators due to accidental contact with the shell, thus improving the safety of equipment use.

[0029] In this embodiment, a moisture vent 14 is provided through the rear wall of the drying shell 1. The moisture vent 14 is installed in conjunction with partition 2, partition 3, and partition 4. During the drying process, the moisture in the material will be released in the form of water vapor. The moisture vent 14 can promptly discharge this moisture out of the drying shell 1, keeping the internal air dry and facilitating the continuous evaporation of moisture from the material, thus improving drying efficiency. At the same time, the installation of the moisture vent 14 in conjunction with the three partitions makes the discharge of moisture smoother and more uniform, preventing localized moisture accumulation and further ensuring the uniformity of the drying effect.

[0030] In this embodiment, a fan 15 is provided in the middle of the left wall of the drying shell 1, and the input end of the fan 15 is electrically connected to the output end of an external microcontroller. By controlling the operation of the fan 15 through the external microcontroller, the air speed and air volume can be precisely adjusted according to the actual needs of the drying process. In the initial stage of drying, a larger air volume may be needed to quickly remove moisture from the surface of the material; as drying progresses, appropriately reducing the air volume can prevent the material from being excessively blown, thus affecting the drying effect. This precise control method helps to achieve a more efficient and stable drying process, improving the intelligence level of the equipment and the drying quality.

[0031] In this embodiment, a burner 16 is installed through the lower left wall of the drying shell 1. The input end of the burner 16 is electrically connected to the output end of an external microcontroller. One end of the burner 16 has a combustion air duct 17 and is connected to the air pipe 13. The hot airflow generated by the burner 16 enters the air pipe 13 through the combustion air duct 17, providing a stable heat source for the drying shell 1. This direct heating method can quickly increase the temperature inside the drying shell 1, shorten the preheating time, and improve the drying efficiency. At the same time, through the connection with the air pipe 13, the hot airflow can be evenly distributed inside the drying shell 1, ensuring that the materials in all parts receive sufficient heat supply, further improving the uniformity of the drying effect.

[0032] In this embodiment, an air inlet 18 is provided at the upper end of the front wall of the drying shell 1. During the drying process, the air pressure and gas composition inside the drying shell 1 may change due to the discharge of moisture from the exhaust port 14 and possible slight air leakage. The air inlet 18 allows fresh air from outside to be introduced into the drying shell 1 in a timely manner, maintaining stable internal air pressure and ensuring normal gas circulation and heat transfer. At the same time, the introduction of fresh air also helps to dilute the internal moisture concentration, further improving the dehumidification effect and promoting the smooth progress of the drying process.

[0033] In this embodiment:

[0034] (1) First, the spunlace fabric 9 is tightly and evenly interwoven around the outside of the round mesh 8 in a specific manner to build a good foundation for the subsequent drying process; then, the burner 16 is preheated by precisely controlling the fuel supply and air mixing ratio inside it to ensure that the fuel is fully mixed and ready for combustion and heating, laying the foundation for the subsequent generation of high-temperature hot airflow.

[0035] (2) After the fuel and air in the burner 16 are fully mixed, the combustion program is started. During the combustion process, a large amount of heat energy is released and the temperature continues to rise, thereby generating a high-temperature hot airflow. The generated high-temperature hot airflow flows into the gas pipe 13 in an orderly and stable manner along the specific combustion air duct 17. During this transmission process, the flow rate and direction of the hot air are precisely controlled to achieve efficient heating of the drying gas.

[0036] (3) Start the fan 15. The powerful airflow generated by its operation pushes the hot air in the air pipe 13 through the upper and lower ends of the left side of the partition 2 3, and through the ventilation slot 1 into the upper air distribution plate and the lower air distribution plate. The surfaces of the upper and lower air distribution plates are evenly distributed with carefully designed air holes. When the hot air passes through these air holes, it is dispersed into a stable laminar flow state. This air distribution treatment can ensure that the hot air acts evenly on all parts of the spunlace fabric 9 in the device, avoiding local overheating or uneven drying. The evenly distributed hot air is in full contact with the spunlace fabric 9. The heat is transferred from the hot air to the spunlace fabric 9, causing the moisture in it to gradually evaporate. During the movement of the spunlace fabric 9, it drives the circular mesh 8 to rotate adaptively around the axis of the corresponding rotating shaft 6 through the contact friction between itself and the circular mesh 8.

[0037] (4) The dried gas, carrying the water vapor separated from the spunlace fabric 9, passes through the ventilation slot 2 in the middle of partition 12 and enters the negative pressure cavity formed by partition 12, partition 23, and partition 34. Since the temperature of the humid air in the negative pressure cavity is low and the moisture content is high, it is the optimal location for dehumidification. The dehumidification pipe is set in this negative pressure cavity, and the heat carried by the dehumidified air is recovered and utilized in the negative pressure cavity. The hot air penetrates the heated spunlace fabric 9 and enters the interior of the circular mesh, becoming humid and hot air with a higher water content. It then enters the negative pressure cavity through the circular mesh. Then, it is drawn away by the fan 15 for reheating. The heated hot air circulates continuously to dry the spunlace nonwoven fabric entering the dryer.

[0038] (5) The air supply port 18 supplies air to the inside of the device. The direction of the air supply is opposite to the direction of the conveying of the spunlace fabric 9. While the device is gradually heated, the air supply can reduce the surface temperature of the spunlace fabric 9 after it is effectively dried, making it easier to control the moisture content of the fabric. The heat insulation plate 12 provides heat insulation and heat preservation treatment for the inside of the device, further reducing energy consumption.

[0039] It is worth noting that the fan 15 disclosed in the above embodiments can be a 2HB210-7AH16 high-pressure fan, and the burner 16 can be a WM30 series burner. The external single-chip microcomputer controls the operation of the fan 15 and the burner 16 using methods commonly used in the prior art.

[0040] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0041] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. An energy-saving rotary screen dryer, comprising a drying shell (1), characterized in that: The drying shell (1) is provided with partition 1 (2) and partition 2 (3) inside. Partition 1 (2) is provided with a frame (5) on one side. Partition 5 is provided with a rotating shaft on one side. One end of the rotating shaft (6) is rotatably connected to four evenly distributed mesh partitions (7). The outer side of each mesh partition (7) is provided with a round mesh piece (8). Hydroentangled cloth (9) is wound between the round mesh pieces (8). Partition 2 (3) and partition 1 (2) are provided with two symmetrically distributed partitions 3 (4). Partition 2 (3) is provided with an air pipe 1 (13) through the middle. Both the upper and lower ends of partition 2 (3) and partition 1 (2) are provided with ventilation slots 1. Between partition 1 (2) and the right wall of drying shell (1), an upper air equalizer (11) and a lower air equalizer (10) are provided from top to bottom.

2. The energy-saving rotary screen dryer according to claim 1, characterized in that: The right wall of the drying shell (1) is equipped with heat insulation plates (12) at both the upper and lower ends. The heat insulation plates (12) are made of multi-layer composite material.

3. The energy-saving rotary screen dryer according to claim 1, characterized in that: The rear wall of the drying shell (1) is provided with a moisture exhaust port (14), which is installed in conjunction with partition 1 (2), partition 2 (3) and partition 3 (4).

4. The energy-saving rotary screen dryer according to claim 1, characterized in that: A fan (15) is provided in the middle of the left wall of the drying shell (1).

5. The energy-saving rotary screen dryer according to claim 1, characterized in that: A burner (16) is provided through the lower left wall of the drying shell (1). One end of the air outlet of the burner (16) is provided with a combustion air duct (17) and is connected to the air pipe (13).

6. The energy-saving rotary screen dryer according to claim 1, characterized in that: An air inlet (18) is provided at the upper end of the front wall of the drying shell (1).

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