A drying device for a twin-screw granulator

Abstract

This utility model relates to the technical field of drying equipment, and discloses a drying device for a twin-screw granulator, including a drying chamber and a hot air conveying box. A stirring mechanism is provided on the inner wall of the drying chamber. The stirring mechanism includes a stirring drum, with an auger rotatably connected to the bottom surface of the stirring drum. A servo motor is installed at the upper end of the stirring drum. A fixing ring is fixedly connected to the upper end of the outer wall of the auger. Horizontal plates are fixedly connected to both ends of the fixing ring. Scrapers are fixedly connected to the ends of the two horizontal plates away from the center of the stirring drum. Connecting rings are fixedly connected to the lower ends of the two scrapers. Discharge ports are opened on both sides of the upper end of the stirring drum. In this utility model, the auger blades driven by the servo motor stably convey and discharge the particles on the filter screen upwards. During this process, the hot air blown in by the hot air conveying box ensures uniform particle distribution, effectively avoiding accumulation and uneven drying in certain areas. The scrapers and horizontal plates prevent wet material from adhering to the inner wall, ensuring equipment cleanliness.

Description

Technical Field

[0001] This utility model relates to the field of drying equipment technology, and in particular to a drying device for a twin-screw granulator. Background Technology

[0002] In industries such as plastics, chemicals, food, and pharmaceuticals, twin-screw granulators are widely used as efficient and continuous mixing and extrusion equipment to melt, blend, and plasticize various basic raw materials and additives in powder, liquid, or block form, and finally extrude them into uniform granules. However, during the granulation process, especially in mainstream processes such as underwater pelletizing or water ring pelletizing, a large amount of moisture adheres to the surface of the freshly formed granules. Therefore, after the granulation process, a critical drying process must be set up to reduce the moisture content of the granules to the extremely low level required by the process. Traditional drying technologies mainly include the following categories: hot air oven drying, ordinary hot air hopper drying, and vibrating fluidized bed drying.

[0003] Traditional drying devices typically use fluidized beds or boiling beds for drying, but the uneven airflow distribution causes some particle areas to be in a static or semi-static state, resulting in some particles being over-dried while others are still not up to standard. This makes it difficult to achieve effective circulation, and the drying efficiency is low and uneven.

[0004] Therefore, those skilled in the art have provided a drying device for a twin-screw granulator to solve the problems mentioned in the background art. Utility Model Content

[0005] The purpose of this utility model is to address the shortcomings of existing technologies and provide a drying device for a twin-screw granulator. The auger blades driven by a servo motor stably convey the particles on the filter screen upwards and discharge them. During this process, the hot air blown in by the hot air conveyor box makes the particles evenly distributed, effectively avoiding accumulation and uneven drying in some areas. The built-in scraper and cross plate can prevent wet material from sticking to the inner wall, ensuring the cleanliness of the equipment.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A drying device for a twin-screw granulator includes a drying chamber and a hot air conveying chamber. The drying chamber has an inner wall equipped with a stirring mechanism, which includes a stirring drum. An auger is rotatably connected to the bottom surface of the stirring drum. A servo motor is mounted on the upper end of the stirring drum. A fixing ring is fixedly connected to the upper end of the auger's outer wall. Horizontal plates are fixedly connected to both ends of the fixing ring. Scrapers are fixedly connected to the ends of the two horizontal plates furthest from the center of the stirring drum. Connecting rings are fixedly connected to the lower ends of the two scrapers. Discharge ports are located on both sides of the upper end of the stirring drum, and a feed port is located at the lower end of the stirring drum. A vibration motor is mounted on the front end of the outer wall of the feed port. A fixing block is fixedly connected to the lower end of the outer wall of the stirring drum.

[0008] The above technical solution uses a servo motor-driven auger blade to continuously transport particles from the top of the filter screen to the top, where they are then conveyed out of the mixing drum. Combined with the blowing of air from the hot air conveyor box, this achieves uniform particle distribution, avoiding particle accumulation and uneven drying in certain areas. Furthermore, the use of scrapers and cross plates prevents moist particles from sticking to the inside of the drying chamber, ensuring cleanliness inside the equipment and a smooth drying process. This improves the continuity and efficiency of the drying process, enhancing the overall drying effect.

[0009] Furthermore, the inner wall of the drying chamber is provided with a cavity, a feed pipe is connected to the upper end of one side of the drying chamber, and a discharge pipe is connected to the lower end of one side of the drying chamber.

[0010] With the above technical solution, the feed pipe and discharge pipe are located at the two ends of the drying chamber, respectively, so that the particles can continuously enter the drying chamber, be dried, and then be continuously discharged.

[0011] Furthermore, a connecting pipe is connected to the rear end of the hot air conveying box, and the rear end of the connecting pipe is connected to the lower part of the front end of the drying box. Two air outlet pipes are connected to one side of the upper end of the drying box.

[0012] Through the above technical solution, hot air passes upward through the filter screen, causing the particles to be in a suspended or fluidized state. The hot and humid air is effectively discharged through the air outlet pipe, ensuring that the moisture can be removed quickly and thoroughly, and preventing the moisture from condensing and flowing back inside the chamber.

[0013] Furthermore, a filter screen is provided at the lower end of the inner wall of the cavity;

[0014] Through the above technical solution, the filter screen allows hot air entering from the bottom to pass evenly through the entire material layer, while enabling the material to be dried on a flat material layer.

[0015] Furthermore, the outer wall of the connecting ring is fitted to the lower end of the inner wall of the cavity;

[0016] The above technical solution provides support and positioning for the internal scraper.

[0017] Furthermore, the outer wall of the fixing block is fixedly connected to the lower end of the cavity;

[0018] The above technical solution ensures that the entire internal structure will not shake, displace, or vibrate when the servo motor drives the auger to rotate at high speed and the scraper scrapes the inner wall.

[0019] Furthermore, the sides of both scrapers furthest from the center of the mixing cylinder are in contact with the inner wall of the cavity;

[0020] With the above technical solution, when the auger rotates and drives the mixing drum to rotate, the scraper will continuously scrape the inner wall of the drying box, effectively preventing wet or semi-dry sticky particles from sticking to the inner wall.

[0021] Furthermore, the output end of the servo motor is fixedly connected to the upper end of the auger, and the upper end of the auger extends through the stirring drum to the outside of the stirring drum;

[0022] The above technical solution enables the auger to stably and evenly push particles on the filter screen from bottom to top, achieving orderly material flow.

[0023] This utility model has the following beneficial effects:

[0024] 1. The present invention proposes a drying device for a twin-screw granulator, which uses a servo motor-driven auger blade to continuously transport the granules from the upper part of the filter screen to the upper part, and then transports them out of the mixing drum. With the help of the hot air conveying box, uniform distribution of granules is achieved, avoiding the problems of granule accumulation and uneven drying in some areas. At the same time, with the cooperation of scrapers and cross plates, the wet granules are prevented from sticking to the inside of the drying chamber, ensuring the cleanliness of the equipment and the smoothness of the drying process, improving the continuity and efficiency of the drying process, and enhancing the overall drying effect. Attached Figure Description

[0025] Figure 1 This is an isometric view of a drying device for a twin-screw granulator proposed in this utility model;

[0026] Figure 2 This is a schematic diagram of the structure of a drying device for a twin-screw granulator proposed in this utility model;

[0027] Figure 3 This is a partial side sectional view of a drying device for a twin-screw granulator proposed in this utility model;

[0028] Figure 4 This is a partial exploded view of the drying device for a twin-screw granulator proposed in this utility model;

[0029] Figure 5 This is a side view of a drying device for a twin-screw granulator proposed in this utility model.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1. Mixing mechanism; 101. Mixing drum; 102. Screwdriver; 103. Servo motor; 104. Fixing ring; 105. Horizontal plate; 106. Scraper; 107. Connecting ring; 108. Discharge port; 109. Feed port; 110. Vibrating motor; 111. Fixing block;

[0032] 2. Drying oven; 3. Feed pipe; 4. Discharge pipe; 5. Connecting pipe; 6. Hot air conveying box; 7. Air outlet pipe; 8. Filter screen; 9. Cavity. Detailed Implementation

[0033] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of specific embodiments. Obviously, the described specific embodiments are only a part of the specific embodiments of the present invention, and not all of them. Based on the specific embodiments of the present invention, all other specific embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Reference Figure 1 , Figure 2 and Figure 3 This utility model provides a specific implementation method:

[0035] A drying device for a twin-screw granulator includes a drying chamber 2 and a hot air conveying box 6. The inner wall of the drying chamber 2 is provided with a stirring mechanism 1. The stirring mechanism 1 includes a stirring drum 101. An auger 102 is rotatably connected to the bottom surface of the stirring drum 101. A servo motor 103 is provided at the upper end of the stirring drum 101. A fixing ring 104 is fixedly connected to the upper end of the outer wall of the auger 102. Horizontal plates 105 are fixedly connected to both ends of the fixing ring 104. Scrapers 106 are fixedly connected to one end of each horizontal plate 105 away from the center of the stirring drum 101. Connecting rings 107 are fixedly connected to the lower ends of each scraper 106. Discharge ports 108 are opened on both sides of the upper end of the stirring drum 101. A feed port 109 is opened at the lower end of the stirring drum 101. A vibration motor 110 is provided at the front end of the outer wall of the feed port 109. A fixing block 111 is fixedly connected to the lower end of the outer wall of the stirring drum 101.

[0036] The auger blades driven by the servo motor 103 continuously transport the particles from the top of the filter screen 8 to the top, and then convey them out of the mixing drum 101. With the air blowing from the hot air conveying box 6, the particles are evenly distributed, avoiding particle accumulation and uneven drying in some areas. At the same time, with the cooperation of the scraper 106 and the horizontal plate 105, the wet particles are prevented from sticking to the inside of the drying chamber 2, ensuring the cleanliness of the equipment and the smoothness of the drying process, improving the continuity and efficiency of the drying process, and enhancing the overall drying effect.

[0037] Reference Figure 3 , Figure 4 and Figure 5The drying chamber 2 has a cavity 9 on its inner wall. The upper end of the other side of the drying chamber 2 is connected to the feed pipe 3, and the lower end of the other side of the drying chamber 2 is connected to the discharge pipe 4. The feed pipe 3 and the discharge pipe 4 are located at the two ends of the drying chamber 2, so that the particles can continuously enter the drying chamber 2, and after drying, they can be continuously discharged. The rear end of the hot air conveying box 6 is connected to the connecting pipe 5, and the rear end of the connecting pipe 5 is connected to the lower part of the front end of the drying chamber 2. Two air outlet pipes 7 are connected to the upper side of the drying chamber 2. The hot air passes through the filter screen 8 upward, so that the particles are in a suspended or fluidized state. The hot and humid air is effectively discharged through the air outlet pipes 7, ensuring that the moisture can be removed quickly and thoroughly, and preventing the moisture from condensing and flowing back in the chamber. The lower end of the inner wall of the cavity 9 is provided with a filter screen 8. The filter screen 8 allows the hot air entering from the bottom to pass evenly through the entire material layer, and at the same time allows the material to be dried on a flat material layer. The outer wall of the connecting ring 107 is attached to the lower end of the inner wall of the cavity 9.

[0038] The internal scraper 106 is supported and positioned. The outer wall of the fixing block 111 is fixedly connected to the lower end of the cavity 9, ensuring that the entire internal structure will not shake, shift, or vibrate when the servo motor 103 drives the auger 102 to rotate at high speed and the scraper 106 scrapes the inner wall. The side of the two scrapers 106 away from the center of the mixing drum 101 is in contact with the inner wall of the cavity 9. When the auger 102 rotates and drives the mixing drum 101 to rotate, the scraper 106 will continuously scrape the inner wall of the drying box 2, effectively preventing wet or semi-dry sticky particles from sticking to the inner wall. The output end of the servo motor 103 is fixedly connected to the upper end of the auger 102. The upper end of the auger 102 penetrates through the mixing drum 101 to the outside of the mixing drum 101, so that the auger 102 can stably and evenly push the particles on the filter screen 8 from bottom to top, realizing the orderly flow of materials.

[0039] Working principle: When using the system, the user first feeds the granules to be dried into the cavity 9 through the feed pipe 3. The granules fall onto the upper part of the filter screen 8. Then, the servo motor 103, driven by an external controller, moves the auger 102, drawing the granules from the upper part of the filter screen 8 into the mixing drum 101 through the feed inlet 109. The auger blades then continuously transport the granules to the upper part of the mixing drum 101, and finally, through the discharge outlet 108, they are discharged from the mixing drum 101 and fall back onto the filter screen 8. They then re-enter the mixing drum 101 through the feed inlet 109, forming a closed-loop conveying system. While the granules are circulating, Start the hot air conveyor box 6, and hot air enters the lower end of the cavity 9 through the connecting pipe 5. The hot air passes through the filter screen 8 at a certain speed and is evenly blown into the drying box 2, making full contact with the particles to achieve efficient heat exchange and moisture evaporation. The discharge port 108 and the feed port 109 of the stirring drum 101 are in circulatory cooperation to avoid the problems of particle accumulation and uneven drying in some areas. At the same time, the cooperation of the scraper 106 and the horizontal plate 105 prevents the moist particles from sticking to the inside of the drying box 2, ensuring the continuity and efficiency of the drying process. The vibration motor 110 is set to prevent the particles from blocking the feed port 109 when they enter from the feed port 109.

[0040] The following points should be noted in this article:

[0041] 1. The accompanying drawings of the embodiments disclosed herein only relate to the structures involved in the embodiments disclosed herein; other structures can be referred to in a general design.

[0042] 2. Where there is no conflict, the embodiments of this disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0043] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing specific embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A drying device for a twin-screw granulator, comprising a drying chamber (2) and a hot air conveying chamber (6), characterized in that: The drying oven (2) is equipped with a stirring mechanism (1) on its inner wall; The stirring mechanism (1) includes a stirring drum (101), an auger (102) is rotatably connected to the bottom surface of the stirring drum (101), a servo motor (103) is provided at the upper end of the stirring drum (101), a fixing ring (104) is fixedly connected to the upper end of the outer wall of the auger (102), a horizontal plate (105) is fixedly connected to both ends of the fixing ring (104), a scraper (106) is fixedly connected to one end of each of the two horizontal plates (105) away from the center of the stirring drum (101), a connecting ring (107) is fixedly connected to the lower end of each of the two scrapers (106), a discharge port (108) is provided on both sides of the upper end of the stirring drum (101), a feed port (109) is provided at the lower end of the stirring drum (101), a vibration motor (110) is provided at the front end of the outer wall of the feed port (109), and a fixing block (111) is fixedly connected to the lower end of the outer wall of the stirring drum (101).

2. The drying device for a twin-screw granulator according to claim 1, characterized in that: The drying chamber (2) has a cavity (9) on its inner wall. A feed pipe (3) is connected to the upper end of one side of the drying chamber (2), and a discharge pipe (4) is connected to the lower end of one side of the drying chamber (2).

3. The drying device for a twin-screw granulator according to claim 1, characterized in that: The hot air conveying box (6) is connected to a connecting pipe (5) at its rear end. The rear end of the connecting pipe (5) is connected to the lower part of the front end of the drying box (2). Two air outlet pipes (7) are connected to one side of the upper end of the drying box (2).

4. A drying device for a twin-screw granulator according to claim 2, characterized in that: A filter screen (8) is provided at the lower end of the inner wall of the cavity (9).

5. A drying device for a twin-screw granulator according to claim 1, characterized in that: The outer wall of the connecting ring (107) is fitted with the lower end of the inner wall of the cavity (9).

6. A drying device for a twin-screw granulator according to claim 1, characterized in that: The outer wall of the fixed block (111) is fixedly connected to the lower end of the cavity (9).

7. A drying device for a twin-screw granulator according to claim 1, characterized in that: Both scrapers (106) are attached to the inner wall of the cavity (9) on the side away from the center of the mixing cylinder (101).

8. A drying device for a twin-screw granulator according to claim 1, characterized in that: The output end of the servo motor (103) is fixedly connected to the upper end of the auger (102), and the upper end of the auger (102) passes through the stirring drum (101) to the outside of the stirring drum (101).

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