Agitator device and granulation system

Abstract

The application discloses a stirring equipment and a granulating system, and the stirring equipment comprises a rack, a jacking mechanism, a stock bin and an oil conveying device which are fixedly installed on the rack. The jacking mechanism is provided with an upper cover above the stock bin, and the upper cover is detachably connected with the stock bin. The end of the upper cover facing the stock bin is provided with a spraying mechanism and a stirring piece, and the spraying mechanism is connected with the oil conveying device. The oil conveying device comprises an oil tank and a conveying mechanism, the oil tank conveys oil to the spraying mechanism through the conveying mechanism, and the bottom of the oil tank is provided with a weighing sensor for detecting the weight of the oil tank. The real-time detection of the weight change of the oil tank by the weighing sensor realizes the accurate metering and uniform spraying of white oil and ensures the stability of product quality. The white oil is atomized and uniformly sprayed on the surface of the powder by the spraying mechanism in the mode that the stirring and oil filling are simultaneously performed, and the uniform mixing of the powder and the white oil is realized by the stirring piece, so that the phenomenon of clumping is effectively avoided.

Description

Technical Field

[0001] This invention relates to the field of extrusion production technology, specifically to a mixing device and a granulation system. Background Technology

[0002] In the production of plastic pellets, certain materials (such as TPE) often require the addition of white oil (naphthenic oil or paraffin oil) to improve their processing properties and the flexibility of the final product. In the water-stretching pelleting process, the addition of white oil is often done manually or controlled by simple flow meters, making precise measurement difficult and leading to inconsistent product quality. Furthermore, the materials have strict requirements regarding white oil content; excessive oil filling results in overly soft material that sticks to the mold, while insufficient oil filling leads to overly hard material with insufficient elasticity. In addition, the powder feeding process in existing pelleting systems easily generates a large amount of dust, causing material waste and severely impacting the operating environment. The drying process also suffers from inefficiency; when the material in the dryer reaches a certain level, it needs to be stopped to wait for drying to complete, preventing continuous operation of the entire production line and hindering efficiency improvements. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a mixing device and granulation system to solve the technical problems of quantitative oil filling, uniform mixing of powder and oil, and continuous production without stopping for specific materials.

[0004] This invention proposes a stirring device, comprising: A frame, on which a lifting mechanism, a hopper, and an oil conveying device are fixedly installed; The lifting mechanism is provided with an upper cover above the silo, the upper cover is detachably connected to the silo, and the lifting mechanism can drive the upper cover to move; the upper cover is provided with a dust-free feeding device; the end of the upper cover facing the silo has a spraying mechanism and a stirring component, and the spraying mechanism is connected to the oil conveying device; The oil delivery device includes an oil tank and a conveying mechanism. The oil tank delivers oil to the spraying mechanism through the conveying mechanism. The bottom of the oil tank has a weighing sensor to detect the weight of the oil tank.

[0005] In one embodiment, the dust-free feeding device has a dust collection port, which is connected to a dust removal device.

[0006] In one embodiment, a one-way valve is provided between the conveying mechanism and the spraying mechanism.

[0007] In one embodiment, the conveying mechanism has a gear pump.

[0008] In one embodiment, the bottom of the hopper has a discharge port, and a first butterfly valve for controlling the discharge amount is provided at the discharge port.

[0009] The present invention also proposes a granulation system, including the mixing equipment and screw conveyor as described above. The screw conveyor includes a storage hopper and a conveying pipe located below the discharge port of the silo. The output end of the conveying pipe is connected to a screw extruder. The output end of the screw extruder is equipped with a temperature control device. The output end of the temperature control device is equipped with a blower for filtering and drying the material. The output end of the blower is equipped with a pelletizer. The outlet side of the pelletizer is sequentially equipped with a homogenizing and drying device, a screening device, and a packaging device.

[0010] In one embodiment, the screw extruder includes a main feed hopper, on which a level detector is provided, and the level detector is signal-connected to the screw conveyor.

[0011] In one embodiment, the temperature control device includes a first water tank and a second water tank arranged sequentially. In one embodiment, the homogenizing and drying device includes an external circulation homogenizing and drying machine, an internal circulation homogenizing and drying machine, a first receiving bin, and a suction pipe; the first receiving bin is located at the output end of the pelletizer; the external circulation homogenizing and drying machine is connected to the internal circulation homogenizing and drying machine through the suction pipe, and the suction pipe is equipped with a pneumatic valve; The external circulation homogenizing dryer has a first vacuum feeder and a first machine body connected to the first receiving hopper. The first machine body is provided with a first hot air pipe for drying materials. The first machine body is provided with a first material level detector for detecting the material position. The first machine body is connected to the first receiving hopper through a first conveying pipe. The first conveying pipe is provided with a second butterfly valve. The internal circulation homogenizing dryer has a second body and a second vacuum feeder installed on the second body. The second body is connected to the second vacuum feeder through a second conveying pipe. The second body is provided with a second hot air pipe for drying materials, and the second body is provided with a second material level detector for detecting the material position.

[0012] In one embodiment, the internal circulation homogenizing dryer is connected to the screening device via a third conveying pipe, and the third conveying pipe is equipped with a third butterfly valve; the screening device includes a cooling vibrating screen and a second receiving bin located at the output end of the cooling vibrating screen, and the second receiving bin is connected to the packaging device.

[0013] The mixing equipment and granulation system provided by this invention include a frame on which a lifting mechanism, a hopper, and an oil conveying device are fixedly mounted. The lifting mechanism has a top cover above the hopper, which is detachably connected to the hopper. The end of the top cover facing the hopper has a spraying mechanism and a mixing element; the spraying mechanism is connected to the oil conveying device. The oil conveying device includes an oil tank and a conveying mechanism. The oil tank conveys oil to the spraying mechanism via the conveying mechanism. A weighing sensor at the bottom of the oil tank detects the weight of the oil tank. By monitoring the weight change of the oil tank in real time using the weighing sensor, accurate metering and uniform spraying of the white oil are achieved, ensuring product quality stability. By employing a simultaneous mixing and oil filling method, the spraying mechanism atomizes the white oil and sprays it evenly onto the powder surface, working in conjunction with the mixing element to achieve uniform mixing of the powder and white oil, effectively preventing clumping. Attached Figure Description

[0014] 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 the structures shown in these drawings without creative effort.

[0015] Figure 1 This is a three-dimensional structural schematic diagram of an embodiment of the stirring device of the present invention; Figure 2 Yes, yes Figure 1 A magnified view of a section at point I; Figure 3 This is a schematic diagram of the structure of an embodiment of the granulation system of the present invention; Figure 4 This is a schematic diagram of the structure of an embodiment of the homogenization and drying device of the present invention; Explanation of icon numbers:

[0016] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0017] 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 a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0018] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0019] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0020] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the word "and / or" throughout the text means including three parallel solutions; taking "A and / or B" as an example, it includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0021] In the production of plastic pellets, certain materials (such as TPE) often require the addition of white oil (naphthenic oil or paraffin oil) to improve their processing properties and the flexibility of the final product. In the water-stretching pelleting process, the addition of white oil is often done manually or controlled by simple flow meters, making precise measurement difficult and leading to inconsistent product quality. Furthermore, the materials have strict requirements regarding white oil content; excessive oil filling results in overly soft material that sticks to the mold, while insufficient oil filling leads to overly hard material with insufficient elasticity. In addition, the powder feeding process in existing pelleting systems easily generates a large amount of dust, causing material waste and severely impacting the operating environment. The drying process also suffers from inefficiency; when the material in the dryer reaches a certain level, it needs to be stopped to wait for drying to complete, preventing continuous operation of the entire production line and hindering efficiency improvements.

[0022] This invention proposes a stirring device 1. Please refer to... Figures 1 to 2The system includes: a frame 11, on which a lifting mechanism 12, a hopper 16, and an oil conveying device 17 are fixedly installed; the lifting mechanism 12 has an upper cover 13 above the hopper 16, the upper cover 13 is detachably connected to the hopper 16, and the lifting mechanism 12 can drive the upper cover 13 to move; the upper cover 13 is provided with a dust-free feeding device 14; the end of the upper cover 13 facing the hopper 16 has a spraying mechanism 13a and a stirring component 15, the spraying mechanism 13a is connected to the oil conveying device 17; the oil conveying device 17 includes an oil tank 171 and a conveying mechanism 172, the oil tank 171 conveys oil to the spraying mechanism 13a through the conveying mechanism 172, and the bottom of the oil tank 171 has a weighing sensor 173 for detecting the weight of the oil tank 171.

[0023] In this embodiment, the frame 11 adopts a steel structure frame to support and fix various functional components. Adjustable feet can be installed at the bottom of the frame 11, allowing for fine-tuning of the height according to the flatness of the workshop floor, ensuring the overall levelness and stability of the mixing equipment. The lifting mechanism 12 is fixedly installed on the frame 11. Preferably, the lifting mechanism 12 can be a hydraulic lifting device or an electric push rod, with a lifting force sufficient to meet the weight requirements of the upper cover 13 and its accessories, ensuring a smooth and reliable lifting process. Preferably, the control system of the lifting mechanism 12 is equipped with limit sensors to prevent overtravel operation and also has a pressure loss protection function to ensure that the upper cover 13 will not suddenly fall in the event of an accidental power outage. The upper cover 13 is installed on the moving end of the lifting mechanism 12, located directly above the opening of the hopper 16. The upper cover 13 is connected to the lifting mechanism 12 by a hinge or flange connection, ensuring that the upper cover 13 remains level and does not tilt during the lifting process of the lifting mechanism 12. The hopper 16 is made of corrosion-resistant and wear-resistant metal, and its inner wall surface is polished to reduce roughness and effectively reduce material adhesion. Understandably, the capacity of the hopper 16 is determined based on the actual production scale. A detachable sealing connection is achieved between the top cover 13 and the hopper 16 via a sealing ring. The sealing ring is made of high-temperature resistant and oil-corrosion resistant silicone rubber, ensuring airtightness during mixing and oil filling processes and preventing dust spillage and oil mist leakage. When the lifting mechanism 12 is in the retracted state, the top cover 13 closes and presses tightly against the hopper 16, forming a sealed mixing space. When cleaning or material replacement of the hopper 16 is required, the lifting mechanism 12 extends, lifting the top cover 13 to facilitate internal cleaning by operators. A dust-free feeding device 14 is installed on the top cover 13, including a feeding port and a dust collection port 141. The feeding port is used to feed solid materials such as matrix powders and fillers. A spraying mechanism 13a is installed on the side of the upper cover 13 facing the hopper 16 and is connected to the oil conveying device 17 via a pipeline. Preferably, the spraying device 13a can be in the form of an atomizing nozzle or a multi-hole spraying disc, uniformly spraying oil onto the material surface in the form of mist or droplets. A stirring element 15 is installed below the upper cover 13. Preferably, the stirring element 15 can be a double-helix stirring paddle or a frame-type stirring paddle, and the stirring speed can be adjusted according to actual needs. In actual production, the stirring element 15 and the spraying mechanism 13a work together to achieve simultaneous spraying and stirring, ensuring that the powder and oil are uniformly mixed. The oil conveying device 17 includes an oil tank 171, a conveying mechanism 172, and a weighing sensor 173. The oil tank 171 is used to store oil; understandably, the capacity of the oil tank 171 is determined according to the production scale. The conveying mechanism 172 is preferably a gear pump, providing stable flow and precise control of the oil delivery volume. The weighing sensor 173 is installed at the bottom of the oil tank 171 to monitor the weight change of the oil tank 171 in real time, calculate the oil delivery volume through the weight difference, and realize precise control of the oil delivery volume.

[0024] Further, please refer to Figure 1A dust collection port 141 is provided on the dust-free feeding device 14, and a dust removal device is connected to the dust collection port 141.

[0025] Specifically, dust removal equipment can include negative pressure dust collectors, bag filters, cartridge filters, or cyclone dust collectors. These devices promptly remove dust generated during the feeding process to prevent dust overflow. Understandably, the airflow of the dust removal equipment is calculated and determined based on the feed inlet area and the characteristics of the dust.

[0026] Furthermore, a one-way valve is installed between the conveying mechanism 172 and the spraying mechanism 13a to prevent oil backflow and ensure metering accuracy.

[0027] Further, please refer to Figure 1 The bottom of the hopper 16 has a discharge port, and a first butterfly valve 19 is provided at the discharge port to control the discharge amount.

[0028] Specifically, the hopper 16 has an inverted conical structure with a discharge port at the bottom. A first butterfly valve 19 is installed at the discharge port to control the discharge speed and volume of materials. Preferably, the first butterfly valve 19 can be a pneumatic or electric butterfly valve, driven by a pneumatic or electric actuator. The actuator is connected to the control system to achieve remote control and automated operation of the first butterfly valve 19. Understandably, the opening degree of the first butterfly valve 19 is adjustable. By adjusting the opening degree of the first butterfly valve 19, the material discharge speed can be controlled to prevent excessively rapid discharge from causing blockages in the next process.

[0029] This invention also proposes a granulation system. Please refer to... Figures 3 to 4 It includes: the mixing equipment 1 and the screw conveyor 2 as described above. The screw conveyor 2 includes a storage hopper 21 and a conveying pipe located below the discharge port of the silo 16. The output end of the conveying pipe is connected to a screw extruder 3. The output end of the screw extruder 3 is equipped with a temperature control device 4. The output end of the temperature control device 4 is equipped with a blower 5 for filtering and drying the material. The output end of the blower 5 is equipped with a pelletizer 6. The outlet side of the pelletizer 6 is sequentially equipped with a homogenizing and drying device 7, a screening device 8, and a packaging device 9.

[0030] Specifically, the granulation system includes a mixing device 1, a screw conveyor 2, a screw extruder 3, a temperature control device 4, a blower 5, a pelletizer 6, a homogenizing and drying device 7, a screening device 8, and a packaging device 9, connected in sequence. During the material mixing stage, the lifting mechanism 12 is in a closed state to ensure the sealing of the silo 16. The operator feeds the base material powder into the silo 16 through the dust-free feeding device 14 and starts the dust removal equipment. After the powder is fed in, the mixing component 15 starts pre-mixing. Simultaneously, the oil conveying device 17 starts working, and the conveying mechanism 172 transports the oil from the oil tank 171 to the spraying mechanism 13a, spraying it onto the powder surface in an atomized state. The weighing sensor 173 monitors the weight of the oil tank in real time, stopping oil conveying when the weight decreases to a set value. During this process, the mixing component 15 continues to operate, achieving simultaneous mixing and oil filling. After oil filling is completed, other powders or granules can be added according to the formula requirements, and the system can continue to operate for a period of time to ensure that all materials are mixed evenly. After the materials are evenly mixed, the first butterfly valve 19 is opened, and the materials are discharged into the storage hopper 21 of the screw conveyor 2. Understandably, for oil-filled mixed materials, the screw conveyor 2 is the preferred feeding method. Traditional vacuum negative pressure feeding or positive pressure blowing feeding methods easily disrupt the oil film coating on the material surface, leading to material stratification. Furthermore, positive pressure airflow can easily cause the white oil in the material to evaporate or oxidize, affecting product quality. In addition, while bucket elevators or tipping bucket elevators can avoid the problem of stratification during conveying, the overall equipment height is high, and the equipment purchase cost is high, the footprint is large, and maintenance is inconvenient. Therefore, the screw conveyor 2 is preferred as the conveying equipment for oil-filled mixed materials, ensuring that the materials remain uniformly mixed before entering the screw extruder 3, thereby guaranteeing the quality stability and consistency of the final granulated product. Moreover, the screw conveyor 2 has a simple structure, low manufacturing cost, stable and reliable operation, and convenient maintenance. Furthermore, the screw conveyor 2 preferably adopts a U-shaped opening design. When color or formula changes are required, operators can clean the tank through the open-top structure. The large U-shaped opening facilitates quick cleaning and effectively shortens cleaning time. The capacity of the storage hopper 21 is greater than or equal to the capacity of the silo 16. When different types of batching are required, the material in the silo 16 can be discharged all at once, facilitating the mixing equipment 1 to perform other types of batching and oil mixing, achieving parallel operation with downstream processes. The screw conveyor 2 uses a horizontally or inclined conveying pipe to transport materials from the storage hopper 21 to the screw extruder 3. The screw extruder 3 is a twin-screw extruder that melts and plasticizes the material through heating and shearing.

[0031] Further, please refer to Figure 3 The screw extruder 3 includes a main feed bin, on which a level detector 31 is installed, and the level detector 31 is connected to the screw conveyor 2 via a signal.

[0032] Specifically, the main feed hopper receives material conveyed from the storage hopper 21 to the screw extruder 3. A level detector 31 is installed on the main feed hopper. The level detector 31 includes an upper detector 31a and a lower detector 31b, which are used to monitor in real time whether the material level in the main feed hopper is at the upper or lower level. When the material level drops to the lower level, the screw conveyor 2 starts automatic feeding; when the material level reaches the upper level, the screw conveyor 2 stops feeding. The molten material is extruded into strips through the die orifice of the screw extruder 3 and enters the temperature control device 4.

[0033] Further, please refer to Figure 3 The temperature control device 4 includes a first water tank 41 and a second water tank 42 arranged in sequence.

[0034] Specifically, the first water tank 41 can be configured as an insulated water tank or a heated water tank, used for heat preservation or heating treatment according to the material characteristics to avoid internal stress or surface cracks caused by rapid cooling. The second water tank 42 uses room temperature cooling water to cool the extruded strip material. It is understood that both the first water tank 41 and the second water tank 42 are rectangular tanks, the length of which can be determined according to the material strip cooling time and traction speed, and the width according to the number and spacing of the material strips, allowing for simultaneous cooling of multiple strips. After passing through the temperature control device 4, the material surface is covered with moisture. The blower 5, located behind the temperature control device 4, performs preliminary filtration and drying of the material, removing most of the moisture from the material surface. Preferably, the blower 5 can be a high-pressure blower or compressed air. The pre-dried strips enter the pelletizer 6, where they are cut into pellets of specific specifications according to production needs. It is understood that the cutting speed and traction speed of the pelletizer 6 are set according to actual needs. The cut granular material enters the homogenizing and drying device 7 for the next processing step.

[0035] Further, please refer to Figures 3 to 4 The homogenizing and drying device 7 includes an external circulation homogenizing dryer 71, an internal circulation homogenizing dryer 72, a first receiving hopper 73, and a suction pipe 74; the first receiving hopper 73 is located at the output end of the pelletizer 6; the external circulation homogenizing dryer 71 is connected to the internal circulation homogenizing dryer 72 through the suction pipe 74, and a pneumatic valve 741 is provided on the suction pipe 74; the external circulation homogenizing dryer 71 has a first vacuum feeder 711 connected to the first receiving hopper 73 and a first machine body, and the first machine body is provided with a first hot air pipe 712 for drying materials. The first body is equipped with a first material level detector 713 for detecting the material position. The lower part of the first body is connected to the first receiving hopper 73 through a first conveying pipe. The first conveying pipe is equipped with a second butterfly valve 714. The internal circulation homogenizing dryer 72 has a second body and a second vacuum feeder 721 installed on the second body. The second body is connected to the second vacuum feeder 721 through a second conveying pipe. The second body is equipped with a second hot air pipe 722 for drying materials. The second body is equipped with a second material level detector 723 for detecting the material position.

[0036] Specifically, the homogenizing and drying device 7 adopts a dual-machine parallel, cyclic operation mode, including an external circulation homogenizing dryer 71, an internal circulation homogenizing dryer 72, a suction pipe 74 connecting the two, and a first receiving bin 73. The first receiving bin 73 is located at the output end of the pelletizer 6, and the pelletized material falls into the first receiving bin 73. The external circulation homogenizing dryer 71 includes a first vacuum feeder 711, a first machine body, a first conveying pipe, and a circulating conveying pipe. The circulating conveying pipe is located outside the first machine body, with one end connected to the first vacuum feeder 711 and the other end connected to the first receiving bin 73. The first vacuum feeder 711 draws granular material from the first receiving bin 73 into the first machine body through the circulating material pipe. A first hot air pipe 712 is installed inside the first machine body to perform preliminary drying and homogenization of the particles. Understandably, the hot air temperature can be determined according to actual production needs. The first machine body has an inverted conical structure with a material outlet at the bottom, which is connected to the first receiving bin 73 through the first conveying pipe. The dried granular material returns to the first receiving hopper 73 via the first material pipe, forming an external circulation. A second butterfly valve 714 is installed on the first conveying pipe to adjust the discharge speed at the outlet and control the material circulation flow. A first material level detector 713 is installed on the first machine body to detect the material position. Preferably, the vacuum feeding speed of the external circulation homogenizing dryer 71 is much greater than the extrusion speed of the screw extruder 3, and the material level in the external circulation homogenizing dryer 71 continuously rises. When the first material level detector 713 detects a high material level signal, the pneumatic valve 741 on the suction pipe 74 opens, and the second vacuum feeder 721 of the internal circulation homogenizing dryer 72 starts, sucking the material from the external circulation homogenizing dryer 71 into the second machine body. A second material level detector 723 is installed on the second machine body. When the material position in the second machine body is detected to have reached a high material level, the pneumatic valve 741 closes, and the internal circulation homogenizing dryer 72 stops sucking material from the external circulation homogenizing dryer 71, forming an independent circulation drying mode within the internal circulation homogenizing dryer 72. The second machine body contains a second hot air duct 722 for further drying and homogenizing the material particles. Understandably, the hot air temperature can be determined according to actual production needs. The second machine body has an inverted conical structure with a material outlet at the bottom. A second conveying pipe is located at the outlet, with one end connected to the outlet and the other end connected to the second vacuum feeder 721. The material forms an internal circulation within the second machine body through the second vacuum feeder 721 and the second conveying pipe, continuing to undergo deep drying and homogenization. At this time, the external circulation homogenizing dryer 71 can continue to receive material from the pelletizer 6; both can operate independently, and the preceding processes can continue production without affecting each other.

[0037] Further, please refer to Figure 3The internal circulation homogenizing dryer 72 is connected to the screening device 8 through the third conveying pipe, and the third conveying pipe is equipped with a third butterfly valve 724; the screening device 8 includes a cooling vibrating screen 81 and a second receiving bin 82 located at the output end of the cooling vibrating screen 81, and the second receiving bin 82 is connected to the packaging device 9.

[0038] Specifically, after the internal circulation homogenizing dryer 72 completes drying, the third butterfly valve 724 is opened, and the homogenized and dried material enters the cooling vibrating screen 81 of the screening device 8 for cooling and screening. The qualified material enters the second receiving bin 82. Preferably, the cooling vibrating screen 81 uses a multi-layer screen and has a ventilation structure at the bottom for air cooling of the particles, effectively preventing clumping after packaging. The second receiving bin 82 is connected to the packaging device 9, which includes a packaging transfer bin 91 and a fully automatic packaging machine 92. The packaging transfer bin 91 is equipped with a third vacuum feeder 911, which sucks all the material from the second receiving bin 82 and temporarily stores it in the packaging transfer bin 91. The packaging transfer bin 91 has an inverted conical structure with a packaging outlet at the bottom, through which the material enters the fully automatic packaging machine 92. Preferably, the fully automatic packaging machine 92 can perform quantitative weighing, automatic filling, sealing, and palletizing processes. While the previous batch of materials is being packaged, the internal circulation homogenizing dryer 72 can continue to receive materials from the external circulation homogenizing dryer 71 and begin the drying work for the next batch, thus achieving continuous production without stopping the entire system.

[0039] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," 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, the 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 suitable manner in one or more embodiments or examples.

[0040] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention.

Claims

1. A mixing device (1), characterized in that, include: A frame (11) is fixedly installed with a lifting mechanism (12), a hopper (16) and an oil conveying device (17). The lifting mechanism (12) has an upper cover (13) above the silo (16). The upper cover (13) is detachably connected to the silo (16). The lifting mechanism (12) can move the upper cover (13). The upper cover (13) is equipped with a dust-free feeding device (14). The end of the upper cover (13) facing the silo (16) has a spraying mechanism (13a) and a stirring component (15). The spraying mechanism (13a) is connected to the oil conveying device (17). The oil delivery device (17) includes an oil tank (171) and a delivery mechanism (172). The oil tank (171) delivers oil to the spraying mechanism (13a) through the delivery mechanism (172). The bottom of the oil tank (171) has a weighing sensor (173) for detecting the weight of the oil tank (171).

2. The stirring device (1) as described in claim 1, characterized in that, The dust-free feeding device (14) has a dust collection port (141) and the dust collection port (141) is connected to a dust removal device.

3. The mixing device (1) as described in claim 1, characterized in that, A one-way valve is provided between the conveying mechanism (172) and the spraying mechanism (13a).

4. The mixing device (1) as described in claim 1, characterized in that, The conveying mechanism (172) has a gear pump.

5. The mixing device (1) as described in claim 1, characterized in that, The bottom of the hopper (16) has a discharge port, and a first butterfly valve (19) for controlling the discharge amount is provided at the discharge port.

6. A granulation system, characterized in that, The granulation system includes a mixing device (1) as described in any one of claims 1-5 and a screw conveyor (2). The screw conveyor (2) includes a storage hopper (21) and a conveying pipe located below the discharge port of the silo (16). The output end of the conveying pipe is connected to a screw extruder (3). The output end of the screw extruder (3) is provided with a temperature control device (4). The output end of the temperature control device (4) is provided with a blower (5) for filtering and drying the material. The output end of the blower (5) is provided with a pelletizer (6). The outlet side of the pelletizer (6) is sequentially provided with a homogenizing and drying device (7), a screening device (8), and a packaging device (9).

7. The granulation system as described in claim 6, characterized in that, The screw extruder (3) includes a main hopper, on which a level detector (31) is provided, and the level detector (31) is signal-connected to the screw conveyor (2).

8. The granulation system as described in claim 6, characterized in that, The temperature control device (4) includes a first water tank (41) and a second water tank (42) arranged in sequence.

9. The granulation system as described in claim 6, characterized in that, The homogenization and drying device (7) includes an external circulation homogenization dryer (71), an internal circulation homogenization dryer (72), a first receiving bin (73), and a suction pipe (74); the first receiving bin (73) is located at the output end of the pelletizer (6); the external circulation homogenization dryer (71) is connected to the internal circulation homogenization dryer (72) through the suction pipe (74), and the suction pipe (74) is equipped with a pneumatic valve (741); The external circulation homogenizing dryer (71) has a first vacuum feeder (711) connected to the first receiving bin (73) and a first machine body. The first machine body is provided with a first hot air pipe (712) for drying materials. The first machine body is provided with a first material level detector (713) for detecting the material position. The first machine body is connected to the first receiving bin (73) through a first conveying pipe. The first conveying pipe is provided with a second butterfly valve (714). The internal circulation homogenizing dryer (72) has a second body and a second vacuum feeder (721) installed on the second body. The second body is connected to the second vacuum feeder (721) through a second conveying pipe. The second body is provided with a second hot air pipe (722) for drying materials. The second body is provided with a second material level detector (723) for detecting the material position.

10. The granulation system as described in claim 9, characterized in that, The internal circulation homogenizing dryer (72) is connected to the screening device (8) through the third conveying pipe, and the third conveying pipe is equipped with a third butterfly valve (724); the screening device (8) includes a cooling vibrating screen (81) and a second receiving bin (82) located at the output end of the cooling vibrating screen (81), and the second receiving bin (82) is connected to the packaging device (9).

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