A raw material pretreatment device for plastic particle production

Abstract

The utility model discloses a raw material pretreatment device is used in plastic granule production, including jar body, the bottom of jar body is provided with the air inlet pipe for discharging hot gas to inside, the wall thickness department of jar body is opened with the cavity groove for heat preservation, the inside fixed mounting of cavity groove has helical blade, the cavity groove is separated into one -way helical air channel through being helical blade, the utility model discloses the cavity groove of opening through jar body wall thickness department, and the damp air with afterheat enters the inside of cavity groove wall thickness department of jar body through connecting pipe, through the helical blade of setting up in the inside of cavity groove, and the air with afterheat is along helical air channel and is transported in the inside of cavity groove, thereby increases the time and uniformity of air and stays in the inside of cavity groove, and the heat of air heats and heat preservation to jar body, finally discharges through the bottom of jar body outside, has improved the temperature in the inside of jar body, realizes the effect that the waste heat is recycled, thereby has improved raw material drying efficiency.

Description

Technical Field

[0001] This utility model relates to the field of lead-acid battery manufacturing technology, specifically to a raw material pretreatment device for plastic granule production. Background Technology

[0002] Plastic pellets are granular materials of a certain size and shape produced by processing plastic raw materials (including virgin materials and recycled materials) through specific processes. They are the most common intermediate products and basic raw materials in the plastics processing industry. Before recycled materials are made into plastic pellets, they need to undergo a series of pretreatment processes such as sorting, crushing, washing, and drying. Among these, the raw material drying equipment used in plastic pellet production is the core equipment in the pretreatment process. Its performance directly affects the moisture content of the raw materials, which in turn determines the physical properties and processing stability of the final pellets, and avoids the generation of bubbles and degradation during pelleting.

[0003] Existing raw material drying equipment generally uses high-temperature air from inside the raw material. After the ambient air is heated, it is sent to the bottom of the drying hopper by a fan, passes upward through the raw material layer, and removes moisture through heat exchange. The humid air is then discharged from the top of the hopper, thus achieving the effect of drying the raw material. However, the air discharged from the tank still has a very high temperature. This heat cannot be effectively recovered and utilized, and direct discharge leads to resource waste and is not conducive to energy conservation and consumption reduction. Therefore, we need to propose a raw material pretreatment device for plastic pellet production. Utility Model Content

[0004] The purpose of this invention is to provide a raw material pretreatment device for plastic granule production. Through an air inlet pipe at the bottom of the tank, heated dry gas from an external air heating device is discharged to the bottom of the tank's inner cavity. The dry air passes through the raw material layer inside the tank, where heat exchange removes moisture, thus achieving rapid drying. The residual heat and humid air enter the cavity groove at the thickest part of the tank wall through a connecting pipe. Through spiral blades inside the cavity groove, the residual heat air is transported along the spiral air passage within the cavity groove, increasing the residence time and uniformity of the air within the cavity groove. The heat from the air heats and insulates the tank, raising the internal temperature and achieving the effect of recovering and utilizing residual heat, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a raw material pretreatment device for plastic granule production, comprising a tank, an air inlet pipe for discharging hot air into the tank at its bottom, a heat-insulating cavity groove formed in the thicker part of the tank wall, a spiral blade fixedly installed inside the cavity groove, the cavity groove being divided into a unidirectional spiral air channel by the spiral blade, the top of the inner side wall of the tank being connected to the upper end of the spiral air channel through a connecting pipe, and a stirring assembly for preventing raw material accumulation installed inside the tank.

[0006] Preferably, a feed pipe is connected to the top of the tank, and a discharge pipe is also connected to the top of the tank.

[0007] Preferably, the exhaust end of the air inlet pipe is connected to the middle of the discharge pipe, and an air inlet cover is bolted to the inner side of the exhaust end of the air inlet pipe by a locking ring.

[0008] Preferably, the bottom of the tank is connected to an exhaust pipe, and one end of the exhaust pipe is connected to the bottom of the cavity.

[0009] Preferably, the stirring assembly includes a motor fixedly bolted to the top of the tank, the output shaft of the motor is keyed to a rotating rod, one end of the rotating rod rotatably penetrates into the interior of the tank, and several sets of stirring rods are fixedly installed in the middle of the rotating rod.

[0010] Preferably, the bottom end of the rotating rod extends into the interior of the discharge pipe, and a spiral auger is fixedly installed on the outer arc surface of the bottom of the rotating rod, with the outer side of the spiral auger fitting against the inner wall of the discharge pipe.

[0011] Compared with the prior art, the beneficial effects of this utility model are: This invention utilizes a cavity created in the thickest part of the tank wall. Warm, humid air enters the cavity through a connecting pipe and is transported along a spiral channel inside the cavity by spiral blades. This increases the residence time and uniformity of the air within the cavity, and the heat from the air heats and insulates the tank. Finally, the air is discharged through the bottom of the tank, raising the internal temperature and achieving the effect of recovering and utilizing waste heat, thereby improving the drying efficiency of the raw materials.

[0012] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained through the structures pointed out in the description and the accompanying drawings. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the spiral blade installation structure of this utility model; Figure 3 This is a schematic diagram of the internal structure of the tank body of this utility model; Figure 4 This is a schematic diagram of the spiral auger installation structure of this utility model; Figure 5 This is a schematic diagram of the internal structure of the air intake pipe of this utility model.

[0014] In the diagram: 1. Tank body; 2. Feed pipe; 3. Discharge pipe; 4. Air inlet pipe; 5. Locking ring; 6. Air inlet hood; 7. Cavity groove; 8. Spiral blade; 9. Spiral air passage; 10. Connecting pipe; 11. Exhaust pipe; 12. Motor; 13. Rotating rod; 14. Stirring rod; 15. Spiral auger. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Please see Figure 1-5 This utility model provides a raw material pretreatment device for plastic granule production, including a tank 1. The bottom of the tank 1 is provided with an air inlet pipe 4 for discharging hot air into the tank. A cavity 7 for heat preservation is opened in the thick part of the tank 1 wall. A spiral blade 8 is fixedly installed inside the cavity 7. The cavity 7 is divided into a one-way spiral air channel 9 by the spiral blade 8. The top of the inner side wall of the tank 1 is connected to the upper end of the spiral air channel 9 through a connecting pipe 10. A stirring component to prevent raw material accumulation is installed inside the tank 1. During use, the heated drying gas is discharged to the bottom of the inner cavity of the tank 1 through the air inlet pipe 4. The drying air passes through the raw material layer inside the tank 1 and removes the moisture from the raw material through heat exchange, thereby achieving the effect of rapid drying of the raw material. The humid air with residual heat enters the cavity groove 7 at the wall thickness of the tank 1 through the connecting pipe 10. Through the spiral blades 8 set inside the cavity groove 7, the air with residual heat is transported along the spiral air passage 9 inside the cavity groove 7, thereby increasing the residence time and uniformity of the air inside the cavity groove 7. The heat of the air heats and insulates the tank 1, increasing the internal temperature of the tank 1 and achieving the effect of recovering and utilizing residual heat. Through the setting of the stirring component, the raw material inside the tank 1 is stirred, so that the raw material and the drying gas are fully and evenly mixed, further improving the drying efficiency of the raw material.

[0017] The top of the tank 1 is connected to a feed pipe 2 and a discharge pipe 3. Through the connection between the tank 1, the feed pipe 2 and the discharge pipe 3, the raw material is quickly discharged into the tank 1 through the feed pipe 2, and the dried raw material is discharged out of the tank 1 through the discharge pipe 3, thereby achieving the effects of feeding and discharging.

[0018] The exhaust end of the air inlet pipe 4 is connected to the middle of the discharge pipe 3. Some raw materials will accumulate inside the discharge pipe 3. Through the connection between the air inlet pipe 4 and the discharge pipe 3, the gas can be evenly introduced. At the same time, the raw materials inside the discharge pipe 3 are dried, avoiding the situation where the raw materials inside the discharge pipe 3 are in a blind spot and cannot be dried. The exhaust end of the air inlet pipe 4 is bolted to the inside of the air inlet cover 6 by the locking ring 5. The air inlet cover 6 effectively prevents the raw materials from entering the exhaust pipe 11 and causing blockage. The threaded connection between the air inlet cover 6 and the locking ring 5 allows for quick installation and removal through the bottom of the discharge pipe 3, making it convenient to clean or replace the air inlet cover 6.

[0019] The bottom of the tank 1 is connected to an exhaust pipe 11, and one end of the exhaust pipe 11 is connected to the bottom of the cavity 7. Through the connection between the tank 1, the cavity 7 and the exhaust pipe 11, the gas entering the air tank is finally discharged through the exhaust pipe 11, and the humid air forms condensate on the inner wall of the cavity 7. The condensate is also eventually discharged through the exhaust pipe 11.

[0020] The stirring assembly includes a motor 12 fixedly bolted to the top of the tank 1. The output shaft of the motor 12 is keyed to a rotating rod 13. One end of the rotating rod 13 rotatably penetrates into the interior of the tank 1, and several sets of stirring rods 14 are fixedly installed in the middle of the rotating rod 13. When the motor 12 is started, the rotating rod 13 rotates counterclockwise inside the tank 1. While the rotating rod 13 rotates, it drives the stirring rods 14 to stir the raw materials, so as to achieve full mixing of the raw materials and the drying gas, thereby accelerating the drying of the raw materials.

[0021] The bottom end of the rotating rod 13 extends into the interior of the discharge pipe 3, and a spiral auger 15 is fixedly installed on the outer arc surface of the bottom of the rotating rod 13. The outer side of the spiral auger 15 is in contact with the inner wall of the discharge pipe 3. During normal stirring and drying, the motor 12 drives the spiral auger 15 to rotate counterclockwise through the rotating rod 13, so that the dry gas inside the discharge pipe 3 can quickly float upward. When discharge is required, the motor 12 drives the spiral auger 15 to rotate clockwise through the rotating rod 13, and the raw material is quickly discharged from the discharge pipe 3 through the rotation of the spiral auger 15, avoiding the accumulation of raw material at the discharge port.

[0022] In practical use, the raw materials to be dried are discharged into the interior of the tank 1 through the feed pipe 2. Then, the heated drying air is discharged into the interior of the discharge pipe 3 through the air inlet pipe 4. The gas rises and eventually passes through the raw material layer to carry away the moisture, thereby achieving the effect of drying the raw materials. When the raw materials are drying, the motor 12 is started and drives the stirring rod 14 to rotate counterclockwise through the rotating rod 13, so as to achieve the effect of stirring and mixing the raw materials and the drying gas, thereby improving the drying efficiency. The humid air with residual heat enters the cavity groove 7 at the wall thickness of the tank 1 through the connecting pipe 10. Through the spiral blades 8 set inside the cavity groove 7, the air with residual heat is transported along the spiral air passage 9 inside the cavity groove 7. The heat of the air heats and insulates the tank 1, and finally discharges through the bottom outside the tank 1, which increases the temperature inside the tank 1 and achieves the effect of recovering and utilizing the residual heat.

[0023] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A raw material pretreatment device for plastic pellet production, characterized in that: The tank includes a tank body (1), the bottom of which is provided with an air inlet pipe (4) for discharging hot air into the tank body (1), and a cavity groove (7) for heat preservation is provided in the thick part of the tank body (1). A spiral blade (8) is fixedly installed inside the cavity groove (7). The cavity groove (7) is divided into a unidirectional spiral air channel (9) by the spiral blade (8). The top of the inner side wall of the tank body (1) is connected to the upper end of the spiral air channel (9) through a connecting pipe (10). A stirring assembly to prevent the accumulation of raw materials is installed inside the tank body (1).

2. The raw material pretreatment device for plastic pellet production according to claim 1, characterized in that: The top of the tank (1) is connected to a feed pipe (2), and the top of the tank (1) is connected to a discharge pipe (3).

3. The raw material pretreatment device for plastic pellet production according to claim 1, characterized in that: The exhaust end of the air inlet pipe (4) is connected to the middle of the discharge pipe (3), and the inner side of the exhaust end of the air inlet pipe (4) is bolted with an air inlet cover (6) by a locking ring (5).

4. The raw material pretreatment device for plastic pellet production according to claim 1, characterized in that: The bottom of the tank (1) is connected to an exhaust pipe (11), and one end of the exhaust pipe (11) is connected to the bottom of the cavity (7).

5. The raw material pretreatment device for plastic pellet production according to claim 1, characterized in that: The stirring assembly includes a motor (12) fixedly bolted to the top of the tank (1). The output shaft of the motor (12) is keyed to a rotating rod (13). One end of the rotating rod (13) rotatably penetrates into the interior of the tank (1), and several sets of stirring rods (14) are fixedly installed in the middle of the rotating rod (13).

6. The raw material pretreatment device for plastic pellet production according to claim 5, characterized in that: The bottom end of the rotating rod (13) extends into the interior of the discharge pipe (3), and a spiral auger (15) is fixedly installed on the outer arc surface of the bottom of the rotating rod (13). The outer side of the spiral auger (15) is in contact with the inner wall of the discharge pipe (3).

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