Spiral drying equipment

Abstract

The utility model belongs to the technical field of material drying, and particularly relates to a spiral drying device which comprises a drying barrel and a motor, the motor is arranged at one end of the drying barrel, a spiral conveying mechanism is fixed at the output end of the motor, and the spiral conveying mechanism is installed in the drying barrel. A material inlet is formed in the top of one end of the drying cylinder, a material outlet is formed in the bottom of the other end of the drying cylinder, a gas outlet is formed in the bottom of one end of the drying cylinder, and a gas inlet is formed in the top of the other end of the drying cylinder; the spiral conveying mechanism comprises a rotating shaft which is installed in the drying barrel, one end of the rotating shaft is fixed to the output end of the motor, and a spiral conveying plate is arranged on the outer side of the rotating shaft. Materials can be continuously conveyed in a spiral conveying mode, meanwhile, the materials are continuously stirred in the conveying process, the materials can be evenly heated in the conveying process, water evaporation is accelerated, and the drying efficiency is remarkably improved.

Description

Technical Field

[0001] This utility model belongs to the field of material drying technology, specifically relating to a spiral drying device. Background Technology

[0002] In the field of material drying, there are many types of thermal drying equipment, such as paddle dryers, belt dryers, drum dryers, and hollow rake dryers. Due to differences in operating conditions, heat source type, and heat source temperature, the equipment design and settings are also different. Paddle dryers use high-temperature steam or thermal oil as heat sources, while belt dryers and drum dryers use low-temperature hot air drying. The equipment has poor sealing performance, and belt dryers cannot continuously turn the material during the drying process, making it difficult for the material to be heated evenly, which can easily lead to incomplete drying and agglomeration. At the same time, due to poor sealing performance, there is a possibility of material overflowing the equipment during the drying process. Hollow rake dryers have good sealing performance, but the material cannot be continuously fed. Utility Model Content

[0003] The purpose of this invention is to provide a spiral drying device that can continuously convey materials through a spiral conveyor, while continuously stirring the materials during the conveying process, so that the materials can be heated evenly during the conveying process, accelerate the evaporation of moisture, and significantly improve the drying efficiency.

[0004] The specific technical solution adopted by this utility model is as follows:

[0005] A spiral drying device includes a drying cylinder and a motor. The motor is located at one end of the drying cylinder, and a spiral conveying mechanism is fixed to the output end of the motor. The spiral conveying mechanism is installed inside the drying cylinder.

[0006] A material inlet is provided at the top of one end of the drying cylinder, a material outlet is provided at the bottom of the other end of the drying cylinder, a gas outlet is provided at the bottom of one end of the drying cylinder, and a gas inlet is provided at the top of the other end of the drying cylinder.

[0007] The screw conveying mechanism includes a rotating shaft, which is installed inside the drying cylinder and one end of which is fixed to the output end of the motor. A screw conveying plate is provided on the outside of the rotating shaft, and the rotating shaft and the screw conveying plate are fixed together by a connecting plate.

[0008] A heat source structure is installed outside the drying cylinder and is used to heat the drying cylinder.

[0009] Furthermore, a rotating shaft seal is installed at both ends of the drying cylinder, the rotating shaft seal is rotatably connected to the rotating shaft, the rotating shaft seal is used to seal the connection point between the drying cylinder and the rotating shaft, and a bearing is installed at one end of the rotating shaft seal, the rotating shaft is rotatably connected to the bearing.

[0010] Furthermore, several material flaps are evenly arranged on the outer side of the spiral conveyor plate.

[0011] Furthermore, the heat source structure is an electric heating sleeve, which is wrapped around the outer circumference of the drying cylinder, and the drying cylinder is heated by energizing the electric heating sleeve.

[0012] Furthermore, the heat source structure is a heat medium sleeve, which is wrapped and installed on the outer circumference of the drying cylinder. A heat medium inlet is provided at the top of one end of the heat medium sleeve, and a heat medium outlet is provided at the bottom of the other end of the heat medium sleeve. The drying cylinder is heated by passing a flowing heat medium into the heat medium sleeve.

[0013] Furthermore, the heat source structure is a hot flue gas sleeve, which is wrapped and installed on the outer circumference of the drying cylinder. A hot flue gas inlet is provided at the top of one end of the hot flue gas sleeve, and a hot flue gas outlet is provided at the bottom of the other end of the hot flue gas sleeve. A flue gas guide plate is installed inside the hot flue gas sleeve, and heat exchange fins are provided on the inside of the hot flue gas sleeve that is in contact with the drying cylinder. The drying cylinder is heated by introducing hot flue gas into the inside of the hot flue gas sleeve.

[0014] The technical effects achieved by this utility model are as follows:

[0015] This invention utilizes a material flipping plate design on the outside of the spiral conveyor plate, combined with a heat source structure to fully enclose and heat the cylinder. As the material is propelled by the spiral, it continuously undergoes three-dimensional tumbling. This structure maximizes the heated surface area of ​​the material, avoids local overheating or clumping, and accelerates moisture evaporation, significantly improving drying efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0018] Figure 3 This is a cross-sectional structural diagram of Embodiment 1 of the present invention;

[0019] Figure 4 This is a cross-sectional structural diagram of Embodiment 2 of the present invention;

[0020] Figure 5This is a cross-sectional structural diagram of Embodiment 3 of this utility model.

[0021] The attached diagram lists the components represented by each number as follows:

[0022] 1. Drying cylinder; 2. Screw conveyor mechanism; 3. Motor; 4. Shaft seal; 5. Bearing; 6. Electric heating sleeve; 7. Heat medium sleeve; 8. Hot flue gas sleeve; 11. Material inlet; 12. Material outlet; 13. Gas inlet; 14. Gas outlet; 21. Rotating shaft; 22. Screw conveyor plate; 23. Material tilting plate; 24. Connecting plate; 71. Heat medium inlet; 72. Heat medium outlet; 81. Hot flue gas inlet; 82. Hot flue gas outlet; 83. Flue gas guide plate; 84. Heat exchange fins. Detailed Implementation

[0023] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0024] Example 1

[0025] like Figures 1 to 3 As shown, a spiral drying device includes a drying cylinder 1 and a motor 3. The motor 3 is located at one end of the drying cylinder 1, and a spiral conveying mechanism 2 is fixed to the output end of the motor 3. The spiral conveying mechanism 2 is installed inside the drying cylinder 1.

[0026] A material inlet 11 is provided at the top of one end of the drying cylinder 1, a material outlet 12 is provided at the bottom of the other end of the drying cylinder 1, a gas outlet 14 is provided at the bottom of one end of the drying cylinder 1, and a gas inlet 13 is provided at the top of the other end of the drying cylinder 1.

[0027] The screw conveyor mechanism 2 includes a rotating shaft 21, which is installed inside the drying cylinder 1 and one end of which is fixed to the output end of the motor 3. A screw conveyor plate 22 is provided on the outside of the rotating shaft 21, and the rotating shaft 21 and the screw conveyor plate 22 are fixed together by a connecting plate 24.

[0028] The heat source structure is installed outside the drying cylinder 1 and is used to heat the drying cylinder 1. The heat source structure is an electric heating sleeve 6, which is wrapped around the outer circumference of the drying cylinder 1. The drying cylinder 1 is heated by energizing the electric heating sleeve 6.

[0029] As described above, the moist material is fed into the drying cylinder 1 through the material inlet 11. The motor 3 drives the screw conveyor 2 to rotate, causing the screw conveyor plate 22 to rotate inside the drying cylinder 1. Since the screw conveyor plate 22 is spiral in shape, it can push the material towards the material outlet 12 when rotating. During this process, the interior of the drying cylinder 1 is heated by the heat source structure, which raises the temperature of the moist material inside, causing the moisture inside to evaporate. Gas is introduced into the gas inlet 13, and the gas passes through the interior of the drying cylinder 1 and is discharged from the gas outlet 14. In the process, the evaporated moisture is carried out, thereby achieving the drying of the material. After drying, the material is discharged from the material outlet 12.

[0030] Furthermore, a rotating shaft seal 4 is installed at both ends of the drying cylinder 1. The rotating shaft seal 4 is rotatably connected to the rotating shaft 21. The rotating shaft seal 4 is used to seal the connection point between the drying cylinder 1 and the rotating shaft 21. A bearing 5 is installed at one end of the rotating shaft seal 4. The rotating shaft 21 is rotatably connected to the bearing 5.

[0031] As described above, the setting of the rotating shaft seal 4 can ensure the sealing of the connection between the drying cylinder 1 and the rotating shaft 21, and ensure the sealing of the inside of the drying cylinder 1.

[0032] Furthermore, several material flaps 23 are evenly arranged on the outer side of the spiral conveyor plate 22;

[0033] As described above, when the spiral conveyor plate 22 rotates and conveys materials, the connecting plate 24 fixed on it can turn the materials over, so that the materials are heated evenly and water vapor is discharged, thereby achieving faster drying of the materials.

[0034] It should be noted that the material inlet 11 is sealed to the external feeding device, the material outlet 12 is sealed to the external discharging device, the gas inlet 13 is sealed to the external air inlet pipe, and the gas outlet 14 is sealed to the exhaust pipe. At the same time, a condenser is also installed at the connection between the gas outlet 14 and the exhaust pipe, which better ensures the sealing of the drying cylinder 1 and can quickly condense the evaporated water, rapidly reducing the humidity inside the drying cylinder 1, thereby achieving a better drying effect.

[0035] Example 2

[0036] like Figure 4 As shown, this embodiment is based on embodiment 1, except that the heat source structure is different: the heat source structure is a heat medium sleeve 7, which is installed around the outer circumference of the drying cylinder 1. A heat medium inlet 71 is provided at the top of one end of the heat medium sleeve 7, and a heat medium outlet 72 is provided at the bottom of the other end of the heat medium sleeve 7. The drying cylinder 1 is heated by passing a flowing heat medium into the heat medium sleeve 7.

[0037] The heat source structure used in this embodiment is a heat medium sleeve 7. The heat medium with good flowability is mainly used to heat the drying cylinder 1. The heat medium is introduced into the heat medium sleeve 7 from the heat medium inlet 71 and the heat medium is recovered from the heat medium outlet 72. The heat medium flows in the heat medium sleeve 7 and transfers heat to the drying cylinder 1, thereby heating the material inside the drying cylinder 1 and completing the drying of the material.

[0038] Furthermore, the heat medium used can be high-temperature steam or high-temperature hot oil.

[0039] Example 3

[0040] like Figure 5 As shown, this embodiment is based on embodiment 1, except that the heat source structure is different: the heat source structure is a hot flue gas sleeve 8, which is installed around the outer periphery of the drying cylinder 1. A hot flue gas inlet 81 is provided at the top of one end of the hot flue gas sleeve 8, and a hot flue gas outlet 82 is provided at the bottom of the other end of the hot flue gas sleeve 8. A flue gas guide plate 83 is installed inside the hot flue gas sleeve 8, and a heat exchange fin 84 is provided inside the hot flue gas sleeve 8 on the side that is in contact with the drying cylinder 1. The drying cylinder 1 is heated by introducing hot flue gas into the hot flue gas sleeve 8.

[0041] In this embodiment, the heat source structure is a hot flue gas sleeve 8. The hot flue gas inlet 81 is connected to the high-temperature flue gas emission pipe of the other equipment. During the drying process, the high-temperature flue gas emitted by the other equipment is introduced into the heat medium inlet 71, so that the high-temperature flue gas enters the interior of the hot flue gas sleeve 8. It flows back through the flue gas guide plate 83, so that the high-temperature flue gas fully contacts the heat exchange fins 84 and conducts heat to the drying cylinder 1, thus completing the heating of the drying cylinder 1. At the same time, the hot flue gas outlet 82 is connected to the flue gas recovery pipe, and the heated flue gas will be discharged into the flue gas treatment equipment through the flue gas recovery pipe.

[0042] The working principle of this utility model is as follows: During use, the drying cylinder 1 is heated by the heat source structure, and the motor 3 is started to drive the rotating shaft 21 to rotate. The material is put into the drying cylinder 1 from the material inlet 11. The rotating shaft 21 drives the spiral conveyor plate 22 to rotate, which can transport the material put into the drying cylinder 1 towards the material outlet 12. During the process, the material flipping plate 23 installed on the spiral conveyor plate 22 can continuously flip the conveyed material. At the same time, combined with the increase in the internal temperature of the drying cylinder 1, the material is heated evenly and the moisture inside evaporates. During the process, gas is introduced into the drying cylinder 1 through the gas inlet 13 and discharged from the gas outlet 14 after passing through the drying cylinder 1, which can carry away the evaporated water vapor. The dried material can be discharged from the material outlet 12, thereby realizing the continuous drying of the material.

[0043] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. A spiral drying device, characterized in that: It includes a drying cylinder (1) and a motor (3). The motor (3) is located at one end of the drying cylinder (1). The output end of the motor (3) is fixed with a screw conveyor mechanism (2). The screw conveyor mechanism (2) is installed inside the drying cylinder (1). The top of one end of the drying cylinder (1) is provided with a material inlet (11), the bottom of the other end of the drying cylinder (1) is provided with a material outlet (12), the bottom of one end of the drying cylinder (1) is provided with a gas outlet (14), and the top of the other end of the drying cylinder (1) is provided with a gas inlet (13). The spiral conveying mechanism (2) includes a rotating shaft (21), which is installed inside the drying cylinder (1) and one end of which is fixed to the output end of the motor (3). A spiral conveying plate (22) is provided on the outside of the rotating shaft (21), and the rotating shaft (21) and the spiral conveying plate (22) are fixed together by a connecting plate (24). A heat source structure is installed outside the drying cylinder (1) and is used to heat the drying cylinder (1).

2. The spiral drying equipment according to claim 1, characterized in that: The drying cylinder (1) is equipped with a rotating shaft seal (4) at both ends. The rotating shaft seal (4) is rotatably connected to the rotating shaft (21). The rotating shaft seal (4) is used to seal the connection point between the drying cylinder (1) and the rotating shaft (21). A bearing (5) is installed at one end of the rotating shaft seal (4). The rotating shaft (21) is rotatably connected to the bearing (5).

3. The spiral drying equipment according to claim 1, characterized in that: Several material flaps (23) are evenly arranged on the outer side of the spiral conveyor plate (22).

4. The spiral drying equipment according to claim 1, characterized in that: The heat source structure is an electric heating sleeve (6), which is wrapped around the outer circumference of the drying cylinder (1). The drying cylinder (1) is heated by energizing the electric heating sleeve (6).

5. The spiral drying equipment according to claim 1, characterized in that: The heat source structure is a heat medium sleeve (7), which is installed on the outer circumference of the drying cylinder (1). A heat medium inlet (71) is provided at the top of one end of the heat medium sleeve (7), and a heat medium outlet (72) is provided at the bottom of the other end of the heat medium sleeve (7). The drying cylinder (1) is heated by passing a flowing heat medium into the heat medium sleeve (7).

6. The spiral drying equipment according to claim 1, characterized in that: The heat source structure is a hot flue gas sleeve (8), which is installed around the outer periphery of the drying cylinder (1). A hot flue gas inlet (81) is provided at the top of one end of the hot flue gas sleeve (8), and a hot flue gas outlet (82) is provided at the bottom of the other end of the hot flue gas sleeve (8). A flue gas guide plate (83) is installed inside the hot flue gas sleeve (8), and a heat exchange fin (84) is provided inside the hot flue gas sleeve (8) and on the side that is in contact with the drying cylinder (1). The drying cylinder (1) is heated by introducing hot flue gas into the hot flue gas sleeve (8).

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