PET (Polyethylene Terephthalate) bottle chip rinsing and dewatering equipment based on asymmetric circulating flow field

Abstract

The invention relates to the technical field of waste plastic recovery and treatment, and particularly discloses PET bottle flake rinsing and dewatering equipment based on an asymmetric circulating flow field, comprising: a rinsing container having an inner cavity for accommodating PET bottle flakes and a rinsing medium; the power assembly is eccentrically arranged relative to the central axis of the rinsing container and is fixedly mounted at the top end of the rinsing container; the stirring mechanism is coaxially connected to an output shaft of the driving power assembly, and the stirring mechanism is located in the inner cavity of the rinsing container; the power assembly is eccentrically arranged relative to the central axis of the rinsing container, the stirring mechanism is driven to do eccentric rotating motion, differential pushing and shearing effects are generated on a rinsing medium when the stirring mechanism eccentrically rotates, the medium is promoted to form an asymmetric circulating flow field with the radial direction and the axial direction overlapped, and the rinsing effect is improved. The formation of an axis low-pressure area and a stable center vortex is inhibited, a mixing dead angle in the cylinder is eliminated, and the PET bottle chips in each area in the rinsing container can be ensured to be in full convection contact with a rinsing medium.

Description

Technical Field

[0001] This invention belongs to the field of waste plastic recycling and treatment technology, specifically relating to a PET bottle flake rinsing and dehydration device based on an asymmetric circulating flow field. Background Technology

[0002] Currently, the recycling of PET drinking bottles in the market generally faces the dilemma of downgrading, with the vast majority of recycled PET drinking bottles being used in textile production, failing to achieve high-value recycling. With the deepening of the circular economy concept, countries are gradually relaxing restrictions on the application of recycled plastics in food contact applications, and closed-loop recycling technology for PET drinking bottles "from bottle to bottle" is gradually becoming the industry mainstream. This technology involves a series of rigorous processes on waste PET bottles, reprocessing them into recycled PET (rPET) material that meets food contact safety standards for use in blowing new bottles.

[0003] In the high-value recycling process of PET "bottle-to-bottle," deep rinsing is a key step. Its core objective is to thoroughly remove residual detergent, adhesives, and various impurities trapped between bottle flakes from the surface of the flakes. The cleanliness after rinsing directly determines the quality of the final rPET product and whether it meets food-grade standards.

[0004] A search revealed that CN119928115A discloses a centrifugal PET flake washing and dehydration integrated machine, which includes a PET flake storage box for storing flakes. Multiple supporting columns are provided on the outside of the PET flake storage box. A feeding port is located at the top of the PET flake storage box, and a feeding cylinder is connected to the tapered port at the bottom of the PET flake storage box. A wastewater collection tank is fixedly installed on the outside of the feeding cylinder. CN217226292U discloses a novel PET flake rinsing and screening device. In this device, a feeding port and a stirring motor are fixedly connected to one end of the screening box. A transmission rod is provided at the output end of the stirring motor, and a stirring rod is fixedly connected to the surface of the transmission rod. A drain pipe is fixedly installed at the other end of the screening box, and a drive motor is fixedly installed on the side of the screening box. The output end of the drive motor meshes with a bevel gear ring through a drive bevel gear.

[0005] The existing rinsing and dewatering equipment mentioned above all adopts the shaft center installation method, and the water flow pattern is completely symmetrical about the shaft. The blades mainly generate tangential flow, and the centrifugal force throws the liquid towards the cylinder wall, resulting in a decrease in pressure in the shaft center area and a depression in the center of the liquid surface, forming a stable and huge central vortex. There are mixing dead zones in the cylinder, which can easily lead to some bottle flakes not being rinsed thoroughly, or even secondary adhesion of impurities. Summary of the Invention

[0006] The purpose of this invention is to provide a PET bottle flake rinsing and dewatering device based on an asymmetric circulating flow field, in order to solve the problems mentioned in the background art. Existing rinsing and dewatering devices all adopt a rotating shaft center installation method, the water flow pattern is completely symmetrical about the rotating shaft, the blades mainly generate tangential flow, and centrifugal force throws the liquid towards the cylinder wall, resulting in a decrease in pressure in the axial region, a concave center of the liquid surface, and the formation of a stable and huge central vortex. There are mixing dead zones in the cylinder, which easily leads to incomplete rinsing of some bottle flakes, or even secondary adhesion of impurities.

[0007] To achieve the above objectives, the present invention provides the following technical solution: A PET bottle flake rinsing and dewatering device based on an asymmetric circulating flow field, comprising: A rinsing container having an inner cavity for containing PET bottle flakes and rinsing media; The powertrain is eccentrically arranged relative to the central axis of the rinsing container and is fixedly installed at the top of the rinsing container; A stirring mechanism is coaxially connected to the output shaft of the drive power assembly, and the stirring mechanism is located in the inner cavity of the rinsing container; The dewatering discharge device is connected to the inner cavity of the rinsing container and is used to discharge the rinsed PET bottle flakes after dewatering. The powertrain is eccentrically arranged to drive the stirring mechanism to agitate the rinsing medium and form an asymmetric circulating flow field.

[0008] In one embodiment, the rinsing container includes: The feeding port is located at the top of the rinsing container; The waste outlet is installed at the bottom of the rinsing container.

[0009] In one embodiment, the powertrain includes: The power source is installed on top of the rinsing container.

[0010] In one embodiment, the stirring mechanism includes: A rotating shaft is disposed inside the rinsing container, and one end of the rotating shaft is connected to the power shaft of the power source; The blades are mounted on the rotating shaft.

[0011] In one embodiment, a plurality of turntables are mounted on the rotating shaft, each turntable having at least three rotating blades, and the plurality of turntables are arranged in a linear array.

[0012] In one embodiment, the bottom of the rinsing container is open, and a base plate is installed at the opening. The outer ring of the base plate is in sealed contact with the inner wall of the rinsing container. An adjustment component is provided on the rotating shaft. The adjustment component is used to adjust the tilt angle of the rotating blades and is connected to the base plate.

[0013] In one embodiment, a fixing plate is installed at the bottom of the rinsing container. The fixing plate is circular, and a bottom plate is positioned above the fixing plate. Several elastic elements are provided between the fixing plate and the bottom plate.

[0014] In one embodiment, the regulating component includes: The telescopic rod has a telescopic groove at the bottom end of the rotating shaft, and the telescopic rod is installed in the telescopic groove. The bottom end of the telescopic rod is installed on the base plate. A rack and pinion is installed on the telescopic pole; The control gear meshes with the rack and pinion, and is connected to the blades via a rotating shaft.

[0015] In a preferred embodiment, the telescopic rod has a control groove, a rack is installed in the control groove, and a control gear is located in the control groove.

[0016] In a preferred embodiment, the turntable has a rotating groove, a rotating seat is rotatably mounted in the rotating groove, a rotating blade is mounted at one end of the rotating seat, and the other end of the rotating seat is connected to a rotating shaft.

[0017] In one embodiment, the dewatering discharge device includes a screw conveyor installed on the rinsing container.

[0018] In one embodiment, a discharge pipe is installed on the discharge port, and a knife valve is installed on the discharge pipe.

[0019] Compared with the prior art, the beneficial effects of the present invention are: By eccentrically arranging the powertrain relative to the central axis of the rinsing container, the stirring mechanism is driven to rotate eccentrically. This changes the symmetrical flow field pattern formed by the central installation of the rotating shaft in traditional equipment. When the stirring mechanism rotates eccentrically, it generates differentiated pushing and shearing effects on the rinsing medium, causing the medium to form an asymmetric circulating flow field with radial and axial superposition. This breaks the flow state dominated by tangential flow, avoids centrifugal force unilaterally throwing the liquid towards the cylinder wall, fundamentally suppresses the formation of the low-pressure zone at the axis and the stable central vortex, eliminates the mixing dead zone inside the cylinder, and ensures that the PET bottle flakes in each area of ​​the rinsing container can have sufficient convective contact with the rinsing medium.

[0020] The continuous shear force and turbulence generated by the asymmetric circulating flow field enhance the relative motion intensity between the bottle flake surface and the rinsing medium, allowing the bottle flakes to fully tumble and collide in the flow field. This efficiently removes residual detergent, adhesives, and various impurities. The asymmetric flow field also drives impurities to migrate rapidly to the bottom of the container. Combined with the knife valve structure at the bottom discharge port, this ensures timely discharge of impurities, cutting off the path for secondary adhesion of impurities in the process and improving the rinsing cleanliness of PET bottle flakes. This lays the raw material foundation for preparing recycled PET materials that meet food contact standards.

[0021] The blade tilt angle can be automatically adjusted according to the PET bottle flake loading. When the material loading is large and there are many impurities, the bottom plate is pressed down and the blade tilt angle increases, which strengthens the flow field turbulence intensity to meet the high-intensity rinsing requirements. When the material loading is small or the bottle flakes are easily damaged, the blade tilt angle automatically decreases to reduce the degree of flow field disturbance and avoid excessive stirring that could damage the bottle flakes. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0023] Figure 2 This is a three-dimensional structural schematic diagram of the present invention from another perspective.

[0024] Figure 3 This is a schematic cross-sectional view of the rinsing container of the present invention.

[0025] Figure 4 This is a schematic diagram of the powertrain and stirring mechanism of the present invention.

[0026] Figure 5 This is a schematic diagram of the internal structure of the rinsing container of the present invention.

[0027] Figure 6 This is a schematic diagram of the rinsing container structure according to Embodiment 2 of the present invention.

[0028] Figure 7 for Figure 6 A cross-sectional schematic diagram of the stirring mechanism in the image.

[0029] In the picture: 10. Rinse container; 101. Feed inlet; 102. Waste discharge outlet; 103. Elastic element; 104. Base plate; 105. Fixing plate; 20. Powertrain; 30. Dewatering and discharging device; 40. Stirring mechanism; 401. Rotating shaft; 402. Turntable; 403. Rotating blade; 404. Telescopic rod; 405. Rotating seat; 406. Control gear; 407. Control groove; 408. Rack. Detailed Implementation

[0030] 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 some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Example 1: Please refer to Figures 1-7A PET bottle flake rinsing and dewatering device based on an asymmetric circulating flow field, comprising: The rinsing container 10 has an inner cavity for containing PET bottle flakes and rinsing media; The power assembly 20 is eccentrically arranged relative to the central axis of the rinsing container 10 and is fixedly installed on the top of the rinsing container 10; The stirring mechanism 40 is coaxially connected to the output shaft of the drive power assembly 20, and the stirring mechanism 40 is located in the inner cavity of the rinsing container 10; The dewatering discharge device 30 is connected to the inner cavity of the rinsing container 10 and is used to discharge the rinsed PET bottle flakes after dewatering. The powertrain 20 is eccentrically arranged to drive the stirring mechanism 40 to agitate the rinsing medium and form an asymmetric circulating flow field.

[0032] Specifically, the power assembly 20 is eccentrically fixed relative to the central axis of the rinsing container 10, driving the coaxially connected stirring mechanism 40 to perform eccentric rotation within the container cavity, rather than the traditional central rotation. This eccentric rotation creates spatial heterogeneity in the stirring action of the stirring mechanism 40 on the rinsing medium, forming an asymmetric circulating flow field with radial and axial superposition. On the one hand, this disrupts the tangential flow-dominated flow field mode under the traditional central rotating shaft structure, avoiding the axial low-pressure area caused by centrifugal force unilaterally throwing the liquid towards the cylinder wall, thereby suppressing the formation of central vortices. On the other hand, the disturbance effect generated by the asymmetric flow field can promote the thorough convective mixing of the rinsing medium and PET bottle flakes in various regions of the container, eliminating the mixing dead zones with excessively low local flow velocities. At the same time, the asymmetric interaction between the stirring mechanism 40 and the rinsing medium generates continuous shear force and turbulence effect, enhancing the removal of impurities from the bottle flake surface. Finally, the clean bottle flakes are efficiently separated and discharged through the dewatering discharge device 30 connected to the inner cavity, completing the coordinated operation of rinsing and dewatering.

[0033] In one embodiment, the rinsing container 10 includes: The feeding port 101 is located at the top of the rinsing container 10; the feeding port 101 is located in the relatively low pressure / low speed zone on the asymmetric circulating flow field path.

[0034] The discharge port 102 is installed at the bottom of the rinsing container 10. A discharge pipe is installed on the discharge port 102, and a knife valve is installed on the discharge pipe. The knife valve is used to cut off the heavy impurities accumulated at the discharge port 102 during the opening and closing process to prevent the discharge pipe from being blocked.

[0035] Specifically, from the perspective of flow field adaptation, there is a spatial difference in pressure and velocity in the asymmetric circulating flow field. Placing the feeding port 101 in a relatively low-pressure / low-velocity zone can utilize the characteristics of small flow field disturbance and weak impact force in this area to reduce the mutual impact between the bottle flakes and the flow field when they are fed in. This allows the bottle flakes to fall smoothly into the rinsing medium under the combined action of their own gravity and the weak traction force of the flow field, avoiding splashing or local aggregation of bottle flakes caused by high-speed flow field impact, and ensuring that the bottle flakes participate in the circulating rinsing evenly. From the perspective of impurity separation, based on the density difference between heavy impurities and PET bottle flakes, gravity sedimentation is utilized. The principle involves placing the discharge port 102 at the bottom of the container, allowing heavy impurities to naturally settle into the discharge port 102 area during the rinsing process. To address the issue of heavy impurities easily accumulating and clogging the pipeline, a knife valve is installed on the discharge pipe. The gate of the knife valve generates shearing force during opening and closing, cutting off the blocky and entangled heavy impurities accumulated at the discharge port 102, ensuring the continuous unobstructed discharge channel, and realizing the directional sedimentation and smooth discharge of heavy impurities. This works in synergy with the rinsing function of the asymmetric circulating flow field, taking into account the needs of stable material feeding, efficient rinsing, and precise separation of impurities.

[0036] In one embodiment, the powertrain 20 includes: The power source is installed on the top of the rinsing container 10. The power source can be a stepper motor or a servo motor.

[0037] In one embodiment, the stirring mechanism 40 includes: A rotating shaft 401 is disposed inside the rinsing container 10, and one end of the rotating shaft 401 is connected to the power shaft of the power source; The blade 403 is mounted on the rotating shaft 401.

[0038] The rotating shaft 401 is equipped with a plurality of turntables 402, each turntable 402 is equipped with at least three rotating blades 403, and the plurality of turntables 402 are arranged in a linear array.

[0039] Specifically, the rotating shaft 401 drives the rotating blade 403 to rotate in an eccentric trajectory rather than a central rotation mode. During the eccentric rotation, the rotating blade 403 generates differentiated pushing and shearing effects on the rinsing medium in different areas of the rinsing container 10, causing the medium to form an asymmetric circulating flow field with radial and axial superposition, thus suppressing the generation of central vortex.

[0040] In one embodiment, the bottom of the rinsing container 10 is open, and a base plate 104 is installed at the opening. The outer ring of the base plate 104 is in sealed contact with the inner wall of the rinsing container 10. An adjustment component is provided on the rotating shaft 401. The adjustment component is used to adjust the tilt angle of the rotating blade 403. The adjustment component is connected to the base plate 104. A fixing plate 105 is installed at the bottom of the rinsing container 10. The fixing plate 105 is circular. The base plate 104 is located above the fixing plate 105. A plurality of elastic elements 103 are provided between the fixing plate 105 and the base plate 104.

[0041] Specifically, the elastic element 103 is a spring, or it can be an elastic block; the annular fixed plate 105 serves as the bottom support base and is fixedly connected to the bottom of the rinsing container 10. The elastic elements 103 are evenly distributed between the fixed plate 105 and the bottom plate 104, providing elastic support for the bottom plate 104. The outer ring of the bottom plate 104 is in sealed contact with the inner wall of the rinsing container 10, ensuring that the rinsing medium does not leak while allowing the bottom plate 104 to move vertically. When PET bottle flakes are put into the rinsing container 10, the weight of the material acts on the bottom plate 104. The greater the amount of bottle flakes loaded, the greater the pressure applied to the bottom plate 104, the greater the compression of the elastic element 103, and the longer the distance the bottom plate 104 moves downward. One end of the adjusting component is connected to the bottom plate 104, and the other end is connected to... The rotating blade 403 connected to the rotating shaft 401 can convert the vertical displacement of the base plate 104 into a mechanical force to drive the angle adjustment of the rotating blade 403, thus changing the tilt angle of the rotating blade 403. The change in the tilt angle of the rotating blade 403 directly affects the thrust direction and disturbance intensity when it agitates the rinsing medium. When the tilt angle increases, the axial pushing effect of the rotating blade 403 on the medium is enhanced, and the turbulence of the asymmetric circulating flow field is increased, which can strengthen the impurity removal effect on high-load or heavily soiled PET flakes. When the tilt angle decreases, the flow field disturbance intensity is reduced, which can be adapted to low-load or easily broken PET flakes, avoiding damage to the flakes caused by excessive agitation. Finally, through this mechanical linkage adaptive adjustment method, the equipment can be matched to different PET flake processing conditions.

[0042] In one embodiment, the regulating component includes: The telescopic rod 404 has a telescopic groove at the bottom end of the rotating shaft 401, and the telescopic rod 404 is installed in the telescopic groove. The bottom end of the telescopic rod 404 is installed on the base plate 104. Rack 408 is mounted on telescopic rod 404; The control gear 406 meshes with the rack 408, and the control gear 406 is connected to the vane 403 via a rotating shaft. The telescopic rod 404 has a control groove 407, a rack 408 is installed in the control groove 407, and a control gear 406 is located in the control groove 407; the turntable 402 has a rotation groove, a rotating seat 405 is rotatably installed in the rotation groove, a rotating blade 403 is installed at one end of the rotating seat 405, and the other end of the rotating seat 405 is connected to the rotating shaft.

[0043] In the above technical solution, the telescopic groove at the bottom of the rotating shaft 401 provides axial movement space and rotational support for the telescopic rod 404. The bottom end of the telescopic rod 404 is fixedly connected to the base plate 104, and the top end can slide up and down along the telescopic groove. At the same time, it can rotate eccentrically with the rotating shaft 401 without affecting the normal stirring function of the stirring mechanism 40. The rack 408 fixedly installed on the telescopic rod 404 and the control gear 406 maintain a continuous meshing state. The control gear 406 is connected to the rotating blade 403 through a special rotating shaft, forming a transmission chain for angle adjustment. When PET bottle flakes are put into the rinsing container 10, the gravity of the material presses the base plate 104 downward, driving the telescopic rod 404 to move down synchronously along the telescopic groove. The rack 408 moves down with the telescopic rod 404, driving the control gear 408 to move down. 06 rotates, and the control gear 406 drives the rotating blade 403 to rotate via the rotating shaft, increasing its tilt angle and enhancing the flow field disturbance intensity. After the bottle flakes are rinsed and discharged, the pressure on the bottom plate 104 decreases, and the elastic element 103 between the fixed plate 105 and the bottom plate 104 releases its rebound force, pushing the bottom plate 104 upward. The telescopic rod 404 then returns to its original position upward, and the rack 408 moves upward, driving the control gear 406 to rotate in the opposite direction. The tilt angle of the rotating blade 403 decreases accordingly, and the flow field disturbance intensity decreases. The entire transmission process relies on the meshing characteristics of the gear and rack 408 to achieve a linear correspondence between the displacement of the bottom plate 104 and the tilt angle adjustment of the rotating blade 403, ensuring that the optimal flow field parameters can be accurately matched under different material loading amounts, and completing the efficient rinsing of different types of PET bottle flakes.

[0044] In one embodiment, the dewatering discharge device 30 includes a screw conveyor installed on the rinsing container 10.

[0045] Example 2: The difference between this example and Example 1 is that the dewatering discharge device 30 includes a rotating shaft mechanism, a feed end communicating with the inside of the rinsing container 10, and a discharge end located outside the rinsing container 10. A water filtration mechanism is provided below the discharge end.

[0046] The water filtration mechanism is connected to the water return treatment system. The rinse water is treated and then recycled. The dewatering and discharge device 30 is used to mechanically dewater the material and convey it out.

[0047] The impurity removal device is used to collect and discharge heavy impurities (such as silt, metal shavings, label fragments, and adhesive agglomerates) separated from PET bottle flakes. It includes a settling tank and an impurity discharge port 102 located at the lowest point of the settling tank and connected to the settling tank.

[0048] The working principle and usage process of this invention are as follows: PET bottle flakes to be processed are fed into the feeding port 101 located at the top of the rinsing container 10. Since the feeding port 101 is located in a relatively low-pressure / low-speed zone on the asymmetric circulating flow path, the bottle flakes fall smoothly into the rinsing medium under the combined action of their own gravity and the weak traction force of the flow field, avoiding splashing or local aggregation caused by the impact of the high-speed flow field. After feeding is completed, the power source of the power assembly 20 is started. The power source drives the coaxially connected rotating shaft 401 to start rotating. Since the power assembly 20 is eccentrically arranged relative to the central axis of the rinsing container 10, the rotating shaft 401 drives the turntable 402 and the blades 403 on it to rotate eccentrically. The rotating blade 403 rotates eccentrically, generating differentiated pushing and shearing forces on the rinsing medium in different areas of the rinsing container 10. This causes the medium to form an asymmetric circulating flow field with radial and axial superposition, disrupting the tangential flow-dominant mode of the traditional central rotating shaft structure, suppressing the generation of central vortices, eliminating mixing dead zones, and allowing the PET bottle flakes to fully tumble and collide in the flow field. Through the combined action of fluid shear force and mechanical impact force, residual detergent, adhesive, and impurities on the surface are peeled off. Simultaneously, as the bottle flakes are added and the rinsing process continues, the gravity of the bottle flakes continuously acts on the bottom plate 104. The greater the loading, the greater the pressure on the bottom plate 104. The elastic element 103... The greater the compression, the longer the base plate 104 moves downward, causing the telescopic rod 404 to move synchronously downward along the telescopic groove of the rotating shaft 401. The rack 408 on the telescopic rod 404 moves downward accordingly, driving the control gear 406 to rotate. The control gear 406, through the rotating shaft, drives the rotating seat 405 to rotate within the rotating groove of the turntable 402, ultimately increasing the tilt angle of the blade 403, enhancing the turbulence of the flow field, and ensuring effective impurity removal for high-load or heavily soiled bottle flakes. If the bottle flake load decreases, the elastic element 103 releases its rebound force, pushing the base plate 104 upward, and the telescopic rod 404 moves upward synchronously. The rack 408 drives the control gear 406 to rotate in the opposite direction, and the blade 403... 3. The tilt angle is reduced to decrease the intensity of flow field disturbance and avoid damage to the PET flakes caused by excessive stirring. During the rinsing process, heavy impurities mixed in the PET flakes continue to settle to the discharge port 102 area at the bottom of the rinsing container 10 under the action of gravity. According to the preset discharge cycle or through the impurity settling monitoring signal, the knife valve on the discharge pipe is activated. The knife valve gate generates shearing force during the opening and closing process to cut off the blocky and entangled heavy impurities accumulated at the discharge port 102, preventing the discharge pipe from being blocked. The heavy impurities are discharged through the discharge pipe along with part of the rinsing medium. After the discharge is completed, the knife valve is closed. An appropriate amount of rinsing medium can be added according to the loss of rinsing medium to ensure the subsequent rinsing effect.After the PET bottle flakes have been rinsed for the preset time, the screw conveyor of the dewatering and discharging device 30 is started. The screw conveyor connects to the inner cavity of the rinsing container 10, transporting the rinsed clean PET bottle flakes to the outside of the equipment. Simultaneously, it achieves preliminary separation of the bottle flakes from the rinsing medium, completing the dewatering and discharging process. During the conveying process, the asymmetric circulating flow field continuously acts to prevent the bottle flakes from accumulating and getting stuck in the container, ensuring smooth discharge. After dewatering and discharging are completed, the power source is turned off, the rotating shaft 401 and the blade 403 stop eccentric rotation, and the knife valve is reopened to discharge the remaining rinsing medium and residual fine impurities from the container. After the medium is completely discharged, the knife valve is closed.

[0049] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A PET bottle flake rinsing and dewatering device based on an asymmetric circulating flow field, characterized in that, include: A rinsing container having an inner cavity for containing PET bottle flakes and rinsing media; The powertrain is eccentrically arranged relative to the central axis of the rinsing container and is fixedly installed at the top of the rinsing container; A stirring mechanism is coaxially connected to the output shaft of the drive power assembly, and the stirring mechanism is located in the inner cavity of the rinsing container; The dewatering discharge device is connected to the inner cavity of the rinsing container and is used to discharge the rinsed PET bottle flakes after dewatering. The powertrain is eccentrically arranged to drive the stirring mechanism to agitate the rinsing medium and form an asymmetric circulating flow field.

2. The PET bottle flake rinsing and dewatering equipment based on an asymmetric circulating flow field according to claim 1, characterized in that: The rinsing container includes: The feeding port is located at the top of the rinsing container; The waste outlet is installed at the bottom of the rinsing container.

3. The PET bottle flake rinsing and dewatering equipment based on an asymmetric circulating flow field according to claim 1, characterized in that: The powertrain includes: The power source is installed on top of the rinsing container.

4. The PET bottle flake rinsing and dewatering equipment based on an asymmetric circulating flow field according to claim 3, characterized in that: The stirring mechanism includes: A rotating shaft is disposed inside the rinsing container, and one end of the rotating shaft is connected to the power shaft of the power source; The blades are mounted on the rotating shaft.

5. The PET bottle flake rinsing and dewatering equipment based on an asymmetric circulating flow field according to claim 4, characterized in that: The rotating shaft is equipped with several turntables, each of which has at least three rotating blades, and the turntables are arranged in a linear array.

6. The PET bottle flake rinsing and dewatering equipment based on an asymmetric circulating flow field according to claim 5, characterized in that: The bottom of the rinsing container is open, and a base plate is installed at the opening. The outer ring of the base plate is in sealed contact with the inner wall of the rinsing container. An adjustment component is provided on the rotating shaft. The adjustment component is used to adjust the tilt angle of the rotating blades and is connected to the base plate.

7. The PET bottle flake rinsing and dewatering equipment based on an asymmetric circulating flow field according to claim 6, characterized in that: The bottom of the rinsing container is equipped with a fixing plate, which is circular in shape. A bottom plate is positioned above the fixing plate, and several elastic elements are provided between the fixing plate and the bottom plate.

8. The PET bottle flake rinsing and dewatering equipment based on an asymmetric circulating flow field according to claim 6, characterized in that: The adjustment component includes: The telescopic rod has a telescopic groove at the bottom end of the rotating shaft, and the telescopic rod is installed in the telescopic groove. The bottom end of the telescopic rod is installed on the base plate. A rack and pinion is installed on the telescopic pole; The control gear meshes with the rack and pinion, and is connected to the blades via a rotating shaft.

9. The PET bottle flake rinsing and dewatering equipment based on an asymmetric circulating flow field according to claim 8, characterized in that: The telescopic rod has a control groove, a rack is installed in the control groove, and a control gear is located in the control groove.

10. The PET bottle flake rinsing and dewatering equipment based on an asymmetric circulating flow field according to claim 8, characterized in that: The turntable has a rotating groove, and a rotating seat is rotatably installed in the rotating groove. The rotating blade is installed at one end of the rotating seat, and the other end of the rotating seat is connected to the rotating shaft.

11. The PET flake rinsing and dewatering equipment based on an asymmetric circulating flow field according to claim 1, characterized in that: The dewatering and discharging device includes a screw conveyor, which is installed on the rinsing container.

12. The PET bottle flake rinsing and dewatering equipment based on an asymmetric circulating flow field according to claim 2, characterized in that: A discharge pipe is installed on the discharge port, and a knife valve is installed on the discharge pipe.

Images