A hopper dryer

Abstract

The utility model relates to drying machine technical field, and disclose a kind of hopper drying machine, including drying cylinder, and the upper end of drying cylinder is provided with feed hopper, and the lower end of drying cylinder is communicated with discharge hopper, and high-temperature drying assembly is installed on the outside of drying cylinder, and high-temperature drying assembly is used to convey high-temperature drying gas in drying cylinder interior, and discharge control assembly is installed between the lower end of drying cylinder and discharge hopper, and stirring rod is arranged in drying cylinder interior, and stirring rod is used for drying cylinder interior material dispersion, and temperature and humidity sensor is installed in drying cylinder interior.The hopper drying machine, air in drying cylinder interior is sucked by using inlet pipe by air pump, forms high-temperature drying gas after heating by gas heater, is then conveyed to drying cylinder by outlet pipe, is connected drying cylinder top by inlet pipe, and outlet pipe is connected bottom, forms countercurrent hot air circulation path.The design makes hot air flow direction and material falling direction opposite, prolongs heat exchange time, and improves heat energy utilization rate.

Description

Technical Field

[0001] This utility model relates to the field of dryer technology, specifically a hopper dryer. Background Technology

[0002] Hopper dryers are widely used in the chemical, food, and pharmaceutical industries for material drying, primarily for dehydrating and drying granular and powdery materials. This equipment achieves moisture evaporation through direct contact between hot air and the material, and features high throughput and ease of operation. Modern hopper dryers typically consist of a drying container, heating system, stirring device, and control system. Drying parameters can be adjusted according to material characteristics to meet the process requirements of different industries.

[0003] Traditional hopper dryers typically employ a simple cylindrical structure, consisting of an upper feed inlet, a middle drying chamber, and a lower discharge outlet, equipped with a basic heating system and fixed agitator blades. The process involves material being fed from the top and slowly falling under gravity. The material is dried by heating the interior of the hopper dryer, undergoing simple heat exchange, and the drying parameters are controlled manually based on experience.

[0004] The above structure has obvious technical defects: the material is prone to accumulation, resulting in uneven heating. The temperature of the material in contact with the inner wall of the hopper dryer is high, while the temperature of the non-contact area is low, which leads to uneven heating of the material and prolongs the drying time.

[0005] Therefore, we propose a hopper dryer to address the problems mentioned above. Utility Model Content

[0006] This utility model provides a hopper dryer, which can solve the problem in the prior art that drying materials by internal heating in the hopper dryer leads to easy accumulation of materials and uneven heating.

[0007] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0008] A hopper dryer includes a drying cylinder, with a feed hopper at the upper end and a discharge hopper at the lower end. A high-temperature drying assembly is installed on the outside of the drying cylinder to deliver high-temperature drying gas into the drying cylinder. A discharge control assembly is installed between the lower end of the drying cylinder and the discharge hopper. A stirring rod is installed inside the drying cylinder to disperse the material inside. A temperature and humidity sensor is also installed inside the drying cylinder.

[0009] Preferably, the stirring rod includes a shaft and spiral blades. The spiral blades are fixedly connected to the outside of the shaft. The shaft coincides with the axis of the drying cylinder and is rotatably connected to the top of the drying cylinder. A servo motor is fixedly installed on the top of the drying cylinder, and the servo motor drives the shaft to rotate.

[0010] Preferably, the high-temperature drying component includes a gas treatment box, inside which a gas heater and a blower are installed. One end of the blower is fixedly connected to an air inlet pipe, and the other end is connected to the gas heater. The gas heater is fixedly connected to an air outlet pipe at the end away from the blower.

[0011] Preferably, the inlet pipe is fixedly connected to the upper end of the drying cylinder, and the end of the outlet pipe away from the gas heater is fixedly connected to the bottom of the drying cylinder.

[0012] Preferably, a filter is installed between the air inlet pipe and the top of the drying cylinder. The filter includes a filter screen plate, which is used to block material particles from flowing into the air inlet pipe.

[0013] Preferably, a dehumidifier is also installed inside the gas handling box. The dehumidifier includes a shell and several perforated storage boxes. The perforated storage boxes are rectangular and arranged in an orderly manner inside the shell. The perforated storage boxes are filled with diluent.

[0014] Preferably, the discharge control component includes a movable plate, which is movably disposed inside the drying cylinder. The movable plate is made of a breathable material, and air holes are evenly distributed inside it. A first material hole is opened on the movable plate.

[0015] Preferably, the bottom of the drying cylinder is provided with a movable groove, the edge of the movable plate is located inside the movable groove, and an elastic band is fixedly connected between the inner wall of the drying cylinder and the movable plate.

[0016] Preferably, the movable plate has a rotating groove inside, and a switch plate is rotatably connected inside the rotating groove. The switch plate is made of the same material as the movable plate and has a second material hole corresponding to the first material hole. A stepper motor that drives the switch plate to rotate is installed at the bottom of the rotating groove. When the first material hole and the second material hole coincide, the material inside the drying cylinder enters the discharge hopper through the first material hole and the second material hole.

[0017] Preferably, a vibrator is installed on one side of the movable plate, which is used to drive the movable plate to shake. The outlet of the air pipe is connected to the inside of the discharge hopper and is located below the movable plate.

[0018] Compared with the prior art, the beneficial effects achieved by this utility model are:

[0019] This invention utilizes a drying cylinder, feed hopper, and discharge hopper to form a material drying flow path. High-temperature drying gas is supplied to the drying cylinder via a high-temperature drying component, and a servo motor drives the spiral blades to rotate. The spiral blades not only act as a stirrer but also propel the material to fall evenly, ensuring that the material does not clump during drying. Simultaneously, they allow the high-temperature gas to fully contact the material, significantly improving drying efficiency and uniformity. A stirring rod disperses the material to further enhance drying efficiency, and temperature and humidity sensors monitor the internal environment in real time. This solution solves the problems of uneven heating and low drying efficiency caused by material accumulation in traditional dryers. Air is drawn into the drying cylinder through an air pump via the inlet pipe, heated by a gas heater to form high-temperature drying gas, and then delivered back into the drying cylinder through the outlet pipe. This not only improves thermal energy utilization efficiency but also facilitates equipment maintenance and repair. The outlet pipe connects to the bottom of the drying cylinder, forming a counter-current hot air circulation path. This design ensures that the hot air flow direction is opposite to the material's falling direction, extending the heat exchange time and improving thermal energy utilization. Simultaneously, this counter-current flow helps remove evaporated moisture from the material, maintaining a low-humidity environment within the drying cylinder, thereby enhancing the overall drying effect. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the internal cross-sectional structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the overall external structure of this utility model;

[0022] Figure 3 This is a cross-sectional view of the high-temperature drying component of this utility model;

[0023] Figure 4 For the present utility model Figure 3 A magnified schematic diagram of the structure at point A.

[0024] The components include: 1. Drying cylinder; 2. Feed hopper; 3. Discharge hopper; 6. Stirring rod; 8. Shaft; 9. Spiral blade; 10. Servo motor; 11. Gas treatment box; 12. Gas heater; 13. Air pump; 14. Inlet pipe; 15. Outlet pipe; 16. Filter; 21. Movable plate; 22. Movable groove; 23. Elastic belt; 24. Rotating groove; 25. Switch plate; 26. Stepper motor; 27. Vibrator. Detailed Implementation

[0025] The specific embodiments of this utility model are described in detail below, but it should be understood that the protection scope of this utility model is not limited to the specific embodiments.

[0026] Example 1:

[0027] Please see Figure 1-4 This utility model provides a technical solution:

[0028] A hopper dryer includes a drying cylinder 1, with a feed hopper 2 at the upper end of the drying cylinder 1 and a discharge hopper 3 connected to the lower end of the drying cylinder 1. A high-temperature drying component is installed on the outside of the drying cylinder 1 to deliver high-temperature drying gas into the drying cylinder 1. A discharge control component is installed between the lower end of the drying cylinder 1 and the discharge hopper 3. A stirring rod 6 is installed inside the drying cylinder 1 to disperse the material inside the drying cylinder 1. A temperature and humidity sensor is also installed inside the drying cylinder 1.

[0029] In the above scheme, the hopper dryer uses a drying cylinder 1, a feed hopper 2, and a discharge hopper 3 to form a material drying flow path. High-temperature drying gas is supplied to the drying cylinder 1 via a high-temperature drying component, and a stirring rod 6 disperses the material to improve drying efficiency. Temperature and humidity sensors monitor the internal environment in real time. This scheme solves the problems of uneven heating and low drying efficiency caused by material accumulation in traditional dryers. Simultaneously, the discharge control component enables precise unloading, facilitating control of the material drying time and convenient unloading. It addresses the problems of uneven heating and low drying efficiency caused by material accumulation in traditional drying equipment, achieving automated control and efficient processing of the material drying process through this integrated design.

[0030] The stirring rod 6 includes a shaft 8 and a spiral blade 9. The spiral blade 9 is fixedly connected to the outside of the shaft 8. The shaft 8 is aligned with the axis of the drying cylinder 1 and is rotatably connected to the top of the drying cylinder 1. A servo motor 10 is fixedly installed on the top of the drying cylinder 1, and the servo motor 10 drives the shaft 8 to rotate.

[0031] In the above scheme, the stirring rod 6 adopts a combination design of shaft 8 and spiral blades 9, and is driven to rotate by servo motor 10. The spiral blades 9 not only serve a stirring function, but also promote the uniform falling of materials, ensuring that the materials do not clump during the drying process. Simultaneously, they allow the high-temperature gas to fully contact the materials, significantly improving drying efficiency and uniformity. The use of the servo motor 10 makes the stirring speed adjustable, which is beneficial for the dispersion control of materials and can adapt to the drying requirements of different materials.

[0032] The high-temperature drying assembly includes a gas treatment box 11, inside which a gas heater 12 and a blower 13 are installed. One end of the blower 13 is fixedly connected to an air inlet pipe 14, and the other end is connected to the gas heater 12. The end of the gas heater 12 away from the blower 13 is fixedly connected to an air outlet pipe 15.

[0033] Air is drawn into the drying cylinder 1 through the air pump 13 via the air inlet pipe 14, heated by the gas heater 12 to form high-temperature dry gas, and then delivered back into the drying cylinder 1 through the air outlet pipe 15. This modular design not only improves thermal energy utilization efficiency but also facilitates equipment maintenance and repair. It ensures stable operation of the entire system and enables a continuous supply of high-temperature dry gas that meets requirements.

[0034] The air inlet pipe 14 is fixedly connected to the upper end of the drying cylinder 1, and the end of the air outlet pipe 15 away from the gas heater 12 is fixedly connected to the bottom of the drying cylinder 1. The air inlet pipe 14 connects to the top of the drying cylinder 1, and the air outlet pipe 15 connects to the bottom, forming a counter-current hot air circulation path. This design makes the hot air flow direction opposite to the material's falling direction, extending the heat exchange time and improving heat energy utilization. Simultaneously, this counter-current flow helps to remove moisture evaporated from the material, maintaining a low humidity environment inside the drying cylinder 1, thereby improving the overall drying effect.

[0035] Furthermore, a filter 16 is installed between the air inlet pipe 14 and the top of the drying cylinder 1. The filter 16 includes a filter screen plate, which is used to block material particles from flowing into the air inlet pipe 14. A dehumidifier is also installed inside the gas handling box 11. The dehumidifier includes a shell and several perforated storage boxes. The perforated storage boxes are rectangular and arranged in an orderly manner inside the shell. The perforated storage boxes are filled with diluent.

[0036] The filter 16, located between the air inlet pipe 14 and the top of the drying cylinder 1, utilizes a filter screen to effectively prevent material particles from entering the gas processing system, avoiding contamination of key components such as the gas heater 12 and the air pump 13. This extends the equipment's service life, reduces maintenance frequency, and ensures the cleanliness of the transported gas. The dehumidifier inside the gas processing box 11 continuously adsorbs moisture from the circulating gas, maintaining its dryness. This design solves the problem of efficiency reduction when reusing humid and hot gas, ensuring that the drying process always operates under optimal conditions. The rectangular arrangement of the perforated storage boxes ensures dehumidification efficiency and facilitates periodic replacement of the diluent.

[0037] Example 2:

[0038] Please see Figure 1-4 Furthermore, in conjunction with Embodiment 1, the discharge control component includes a movable plate 21, which is movably disposed inside the drying cylinder 1. The movable plate 21 is made of a breathable material and has air holes evenly distributed inside it. A first material hole is provided on the movable plate 21. A rotating groove 24 is provided inside the movable plate 21. A switch plate 25 is rotatably connected inside the rotating groove 24. The switch plate 25 is made of the same material as the movable plate 21 and has a second material hole corresponding to the first material hole. A stepper motor 26 is installed at the bottom of the rotating groove 24 to drive the switch plate 25 to rotate. When the first material hole and the second material hole coincide, the material inside the drying cylinder 1 enters the discharge hopper 3 through the first material hole and the second material hole.

[0039] In the above scheme, the stepper motor 26 drives the switch plate 25 inside the movable plate 21 to rotate, controlling the relative position of the two plates to open and close the discharge port. When the first and second material holes coincide, a discharge channel is formed; when they are misaligned, the channel is completely closed, thus solving the problems of inaccurate discharge control, easy leakage, or blockage in traditional dryers. The movable plate 21, made of breathable material, ensures normal circulation of hot air. When the temperature and humidity sensor detects that the temperature and humidity inside the drying cylinder 1 have reached the standard, the material falls and is discharged through the first and second material holes coinciding. When the temperature and humidity inside the drying cylinder 1 are not standard, the first and second material holes are misaligned, and the material continues to be dried.

[0040] The bottom of the drying cylinder 1 is provided with a movable groove 22, the edge of the movable plate 21 is set inside the movable groove 22, and an elastic band 23 is fixedly connected between the inner wall of the drying cylinder 1 and the movable plate 21; a vibrator 27 is installed on one side of the movable plate 21, the vibrator 27 is used to drive the movable plate 21 to shake, and the outlet of the air pipe 15 is connected to the inside of the discharge hopper 3 and is located below the movable plate 21.

[0041] Through the above technical solution, the edge of the movable plate 21 is embedded in the movable groove 22 at the bottom of the drying cylinder 1, forming a flexible sealing structure with the elastic band 23. This ensures the free movement of the movable plate 21 while effectively preventing material leakage. The vibration of the vibrator 27 avoids the adhesion problem that may occur inside the first and second feed holes, and the periodic shaking ensures the smooth falling of the material. The air outlet pipe 15 is extended to the bottom of the movable plate 21 to perform final drying on the material about to be discharged, improving drying efficiency and extending the contact time between the material and the high-temperature drying air.

[0042] The working principle of this hopper dryer is as follows: After the material enters the drying cylinder 1 from the feed hopper 2, the stirring rod 6 driven by the servo motor 10 evenly disperses and slowly moves downwards; at the same time, the air pump 13 in the gas treatment box 11 draws in air through the air inlet pipe 14, and after being heated by the gas heater 12, it forms high-temperature dry gas, which flows back into the drying cylinder 1 from the bottom through the air outlet pipe 15, forming a reverse heat exchange with the falling material; the filter 16 ensures that the gas entering the system is clean, and the dehumidifier is used to maintain the dryness of the gas; the temperature and humidity sensor monitors the environmental parameters in real time. When the set value is reached, the stepper motor 26 drives the switch plate 25 to rotate so that the first material hole and the second material hole coincide, and at the same time, the vibrator 27 shakes, and the dried material is discharged through the movable plate 21; if the standard is not met, the first material hole and the second material hole are misaligned, and the material continues to dry. The air outlet pipe 15 extends to the bottom of the movable plate 21 to perform final drying on the discharged material. This equipment effectively solves the problems of uneven heating, low efficiency, and inaccurate discharge control in traditional dryers by using hot air counterflow, temperature control, and intelligent discharge control, thus achieving automated and efficient processing of the material drying process.

[0043] The above-disclosed embodiments are only a few specific examples of the present utility model. However, the embodiments of the present utility model are not limited thereto. Any variations that can be conceived by those skilled in the art should fall within the protection scope of the present utility model.

Claims

1. A hopper dryer, comprising a drying cylinder (1), characterized in that: The upper end of the drying cylinder (1) is provided with a feeding hopper (2), the lower end of the drying cylinder (1) is connected to a discharge hopper (3), a high temperature drying component is installed on the outside of the drying cylinder (1), the high temperature drying component is used to transport high temperature drying gas into the drying cylinder (1), a discharge control component is installed between the lower end of the drying cylinder (1) and the discharge hopper (3), and a stirring rod (6) is provided inside the drying cylinder (1), the stirring rod (6) is used to disperse the material inside the drying cylinder (1), and a temperature and humidity sensor is installed inside the drying cylinder (1).

2. The hopper dryer according to claim 1, characterized in that: The stirring rod (6) includes a shaft (8) and a spiral blade (9). The spiral blade (9) is fixedly connected to the outside of the shaft (8). The shaft (8) coincides with the axis of the drying cylinder (1) and is rotatably connected to the top of the drying cylinder (1). A servo motor (10) is fixedly installed on the top of the drying cylinder (1). The servo motor (10) drives the shaft (8) to rotate.

3. The hopper dryer according to claim 1, characterized in that: The high-temperature drying assembly includes a gas handling box (11), inside which a gas heater (12) and a blower (13) are installed. One end of the blower (13) is fixedly connected to an air inlet pipe (14), and the other end is connected to the gas heater (12). The gas heater (12) is fixedly connected to an air outlet pipe (15) at the end away from the blower (13).

4. A hopper dryer according to claim 3, characterized in that: The inlet pipe (14) is fixedly connected to the upper end of the drying cylinder (1), and the outlet pipe (15) is fixedly connected to the bottom of the drying cylinder (1) at the end away from the gas heater (12).

5. A hopper dryer according to claim 4, characterized in that: A filter (16) is installed between the air inlet pipe (14) and the top of the drying cylinder (1). The filter (16) includes a filter screen plate, which is used to block material particles from flowing into the air inlet pipe (14).

6. A hopper dryer according to claim 1, characterized in that: The gas handling box (11) is also equipped with a dehumidifier. The dehumidifier includes a shell and several perforated storage boxes. The perforated storage boxes are rectangular and arranged in an orderly manner inside the shell. The perforated storage boxes are filled with diluent.

7. A hopper dryer according to claim 1, characterized in that: The discharge control component includes a movable plate (21), which is movably disposed inside the drying cylinder (1). The movable plate (21) is made of breathable material and has air holes evenly distributed inside it. A first material hole is opened on the movable plate (21).

8. A hopper dryer according to claim 7, characterized in that: The bottom of the drying cylinder (1) is provided with a movable groove (22), the edge of the movable plate (21) is located inside the movable groove (22), and an elastic band (23) is fixedly connected between the inner wall of the drying cylinder (1) and the movable plate (21).

9. A hopper dryer according to claim 8, characterized in that: The movable plate (21) has a rotating groove (24) inside. A switch plate (25) is rotatably connected inside the rotating groove (24). The switch plate (25) is made of the same material as the movable plate (21) and has a second material hole corresponding to the first material hole. A stepper motor (26) that drives the switch plate (25) to rotate is installed at the bottom of the rotating groove (24). When the first material hole and the second material hole coincide, the material inside the drying cylinder (1) enters the discharge hopper (3) through the first material hole and the second material hole.

10. A hopper dryer according to claim 1, characterized in that: A vibrator (27) is installed on one side of the movable plate (21). The vibrator (27) is used to drive the movable plate (21) to shake. The outlet of the air pipe (15) is connected to the inside of the discharge hopper (3) and is located below the movable plate (21).

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