A label flotation separation water washing system for recycling and rinsing PET bottle flakes
By using label flotation to separate the water washing system during the recycling process of PET bottle sheets, the PET bottle sheet with a density greater than water is sunk into the bottom of the water by using water flow and mechanical force, the problem of labels and impurities entering the cleaning system with the bottle sheets is solved, and the problem of the bottle sheets entering the cleaning system is improved. Efficiency and product quality of the recycling process.
Patent Information
- Application Number
- CN202010666846.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2020-07-13
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2040-07-13
AI Technical Summary
During the recycling process of PET bottles, labels and other impurities enter the cleaning system with the PET bottles, resulting in a decrease in product yield and difficulty in granulating trademark paper. It is difficult for the prior art to effectively separate these impurities.
A label flotation separation and washing system is designed, including a bracket, tank body, conveying crane, partition plate, pressing roller and stirring and water discharge combination roller, PET bottles with density greater than water through water flow and mechanical force Press into the water to destroy the surface tension, causing it to sink to the bottom of the water, and reduce the output of the rinsing tank.
It effectively reduces the waste of PET bottle pieces and reduces the output of the rinsing tank, so that the impurity content during the recycling process of PET bottle pieces is close to that of conventional polyester slices, improving the quality and yield of the product.
Smart Images
Figure CN111844531B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of cleansing recycled PET raw materials and PET waste beverage bottle fragments, and in particular to a label flotation separation water washing system for recycling and rinsing PET bottle flakes. Background Art
[0002] There are two main physical recycling methods for PET plastic bottles: one is to chop the waste PET plastic bottles into pieces, separate HDPE, aluminum, paper and adhesive from PET, and then wash, dry and granulate the PET fragments; the other is to mechanically separate the non-PET bottle caps, bases, labels and other impurities on the waste PET plastic bottles, and then wash, crush and granulate them. The recycled PET must not contain PVC impurities, otherwise it will affect the color of PET.
[0003] However, during the current PET bottle flakes crushing and cleaning process, the labels attached to the beverage bottles often enter the cleaning system together with the PET beverage bottle fragments, and the PET bottle flakes are also mixed with many impurities such as PVC, labels, bottle caps, bottle trays, bottle handles, a small amount of sticks, leaves, rubber and other plastics. Recycled PET bottle flakes, as spinning raw materials, must be cleaned of these foreign impurities so that the content of attached impurities on the surface of PET bottle flakes is close to that of conventional polyester chips.
[0004] At present, the conventional method of separating organic impurities in the crushing and cleaning process of PET waste beverage bottle flakes is:
[0005] After the beverage bottles are crushed, they enter the flotation tank. 90% of the organic impurities such as labels and bottle caps float in the water and flow out of the flotation tank along the water flow. The PET bottle flakes containing a small amount of organic impurities such as labels and bottle caps from the flotation tank are hot washed and enter the rinsing tank.
[0006] PET bottle flakes containing a small amount of organic impurities such as labels and bottle caps are pushed and stirred by the conveying auger in the rinsing tank. Under the flushing effect of the water flow, most of the organic substances such as labels and bottle caps with a density of less than 1 gram / cubic centimeter are floated on the water surface. A small amount of some domestic ultra-thin PET waste beverage bottle fragments are also floated on the water surface along with the labels, bottle caps and other organic substances. These floating ultra-thin fragments flow out of the rinsing tank with the water flow, resulting in a lower yield of finished products and difficulty in granulating the trademark paper.
[0007] To this end, the present invention adopts a combined water-pressing paddle to press the ultra-thin PET bottle flakes with a density greater than the water density stirred up by the water flow into the water, thereby destroying the surface tension, so that these PET bottle flakes can enter the next process together with the PET bottle flakes that sink to the bottom of the water, and the amount of PET bottle flakes flowing out of the rinsing tank with the water flow can be reduced to a minimum. Summary of the invention
[0008] In order to make up for the deficiency of low product yield rate when recycling PET bottle flakes in the prior art, the present invention provides a label flotation separation water washing system for recycling and rinsing PET bottle flakes.
[0009] The present invention is achieved through the following technical solutions:
[0010] A label flotation separation water washing system for recycling and rinsing PET bottle flakes, comprising a bracket, a tank body and a plurality of pressing rollers installed on the tank body, characterized in that:
[0011] The bracket is installed on the ground, and the trough body is supported on the bracket;
[0012] The tank body is a shell structure with a narrow bottom and a wide top. A plurality of conveying augers are laid side by side at the bottom of the tank body. A partition plate is vertically fixed at the middle of the tank body. The partition plate divides the internal space of the tank body into two areas, front and back. The tank body in the rear area is provided with a label flotation material outlet. A damping plate is vertically fixed to the left of the label flotation material outlet.
[0013] The plurality of nip rollers are evenly arranged on the top of the tank body from left to right.
[0014] Furthermore, in order to better implement the present invention, a walking bracket is installed on one side of the top of the bracket to facilitate the staff to observe and inspect the internal structure of the trough body.
[0015] Furthermore, in order to better realize the present invention, the plurality of pressure rollers include three discharge rollers, one discharge auger combination roller, four stirring and water-splashing discharge combination rollers and one semi-auger roller; two discharge rollers are rotatably installed side by side at the leftmost end of the top of the trough body, a discharge auger combination roller is rotatably installed on the right side of the discharge roller, four stirring and water-splashing discharge combination rollers are rotatably installed side by side at the right end of the discharge auger combination roller, the rightmost two of the four stirring and water-splashing discharge combination rollers are placed in opposite directions to the two on the leftmost, the right end of the stirring and water-splashing discharge combination roller is rotatably installed with a discharge roller, and a semi-auger roller spiral leaf is rotatably installed on the rightmost end of the top of the trough body, and one end of all the pressure rollers are connected to the drive motor through a transmission mechanism.
[0016] Furthermore, in order to better realize the present invention, the discharge roller includes a discharge roller shaft rotatably connected to the trough body, and a plurality of rectangular strips are evenly radiated and fixed on the discharge roller shaft as discharge roller ribs, and a plurality of through holes are evenly opened on the discharge roller ribs.
[0017] Furthermore, in order to better realize the present invention, the discharging auger combination roller comprises a discharging auger combination roller shaft rotatably connected to the trough body, the front half of the discharging auger combination roller shaft is provided with a discharging auger combination roller rib plate, the rear half of the discharging auger combination roller shaft is provided with a discharging auger combination roller spiral leaf plate, the discharging auger combination roller is installed on the left side of the damping plate, and the discharging auger combination roller spiral leaf plate of the rear half of the discharging auger combination roller shaft is close to the left side of the damping plate.
[0018] Furthermore, in order to better realize the present invention, the stirring, water-splashing and discharging combination roller comprises a stirring, water-splashing and discharging combination roller shaft rotatably connected to the trough body, the front half of the stirring, water-splashing and discharging combination roller shaft is evenly radiated and fixed with a number of stirring, water-splashing and discharging combination roller ribs are evenly radiated and fixed with a number of stirring, water-splashing and discharging combination roller ribs; the two stirring, water-splashing and discharging combination rollers close to the discharging auger combination roller are arranged in such a direction that the ends of the stirring, water-splashing and discharging combination rollers are located in the front part of the trough body, and the remaining two stirring, water-splashing and discharging combination rollers are arranged in such a direction that the ends of the stirring, water-splashing and discharging combination rollers are located in the rear part of the trough body.
[0019] Furthermore, in order to better realize the present invention, the semi-auger roller includes a semi-auger roller shaft rotatably connected to the trough body, the front half of the semi-auger roller shaft is provided with semi-auger roller spiral leaves, the rear half is a smooth axis, and the end of the semi-auger roller shaft provided with the semi-auger roller spiral leaves is placed in the front area of the trough body.
[0020] Furthermore, in order to better realize the present invention, two material beating barrels are arranged on the upper left side of the trough body, and the interior of the material beating barrels is a mixer structure, so that the PET flat sheet is fully in contact with water and bubbles are discharged.
[0021] The beneficial effects of the present invention are:
[0022] By using the device of the present invention to recover and rinse PET bottle flakes, the waste of PET bottle flakes can be reduced to the greatest extent. The combined water-pressing paddles used in the present invention press the ultra-thin PET bottle flakes with a density greater than that of water stirred by the water flow into the water, thereby destroying the surface tension, so that this part of the PET bottle flakes enters the next process together with the PET bottle flakes that sink to the bottom of the water, thereby reducing the amount of PET bottle flakes flowing out of the rinsing tank with the water flow to a minimum. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the label flotation separation water washing system for recycling and rinsing PET bottle flakes of the present invention;
[0024] Figure 2 It is a schematic diagram of the top view of the structure of the label flotation separation washing system for recycling and rinsing PET bottle flakes of the present invention;
[0025] Figure 3It is a top-view stereoscopic structural schematic diagram of a tank body of a label flotation separation water washing system for recycling and rinsing PET bottle flakes of the present invention;
[0026] Figure 4 A schematic diagram of the flow direction of waste labels in a label flotation separation water washing system for recycling and rinsing PET bottle flakes of the present invention;
[0027] Figure 5 It is a schematic diagram of the three-dimensional structure of the discharge roller of the label flotation separation washing system for recycling and rinsing PET bottle flakes of the present invention;
[0028] Figure 6 It is a discharge auger combination roller of the label flotation separation water washing system for recycling and rinsing PET bottle flakes of the present invention;
[0029] Figure 7 It is a stirring, water-beating and material-discharging combined roller of a label flotation separation water washing system for recycling and rinsing PET bottle flakes of the present invention;
[0030] Figure 8 The invention discloses a semi-auger roller of a label flotation separation water washing system for recycling and rinsing PET bottle flakes.
[0031] In the figure,
[0032] 1. Bracket, 2. Tank body, 3. Conveying auger, 4. Partition plate, 5. Damping plate, 6. Label flotation material outlet, 7. Discharge roller, 701, discharge roller shaft, 702, discharge roller rib, 8. Discharge auger combination roller, 801, discharge auger combination roller shaft, 802, discharge auger combination roller rib, 803, discharge auger combination roller spiral blade, 9. Mixing and water-slapping discharge combination roller, 901, mixing and water-slapping discharge combination roller shaft, 902, mixing and water-slapping rod, 903, mixing and water-slapping discharge combination roller rib, 10. Half auger roller, 1001, half auger roller shaft, 1002, half auger roller spiral blade. DETAILED DESCRIPTION
[0033] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the accompanying drawings here can be arranged and designed in various different configurations.
[0034] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present invention.
[0035] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.
[0036] In the description of the present invention, it should be noted that the terms "middle", "upper", "lower", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.
[0037] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "disposed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0039] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.
[0040] Figure 1-Figure 8 This is a specific embodiment of the present invention, which is a label flotation separation water washing system for recycling and rinsing PET bottle flakes. This embodiment uses water as a medium to repeatedly stir and wash the crushed materials and separate them by gravity. PET bottle flakes with a specific gravity greater than water sink and are pushed by the bottom spiral to the discharge spiral to be sent to the next process, while materials with a specific gravity less than water, such as PP and PE, float. The ultra-thin floating PET bottle flakes are repeatedly pressed in, broken up, stirred and sunk, and enter the next process with other sinking bottle flakes.
[0041] In this embodiment, the leftmost side of the tank body 2 is used for loading, and the crushed PET bottle flakes enter here. The PET bottle flakes and labels floating on the water surface are pressed into the water by the discharge roller 7, and the PET bottle flakes sink to the bottom of the tank body 2 and are transported to the right driven by the conveying auger 3 at the bottom.
[0042] After passing through the first discharge roller 7, the labels and ultra-thin PET bottle flakes float to the surface again, and are pressed into the water again by the second discharge roller 7, and part of the ultra-thin PET bottle flakes will sink into the conveying auger 3 at the bottom.
[0043] After passing the second discharge roller 7, the labels and ultra-thin PET bottle flakes float to the surface again. When passing the discharge auger combination roller 8, the floating objects on the water surface in the rear area of the trough body 2 are driven by the spiral leaves 803 of the discharge auger combination roller to flow to the water surface in the front area of the trough body 2, and then are pressed into the water under the action of the ribs 802 of the discharge auger combination roller. At this time, another part of the ultra-thin PET bottle flakes will sink into the conveying auger 3 at the bottom.
[0044] After passing through the discharge auger combination roller 8, the floating labels and ultra-thin PET bottle flakes flow to the stirring and water-splitting discharge combination roller 9. The stirring and water-splitting rod 902 of the water-splitting discharge combination roller 9 presses the ultra-thin PET bottle flakes downward into the water with a force greater than that of the previous pressing rollers, which will make the remaining ultra-thin PET bottle flakes sink into the conveying auger 3 at the bottom as much as possible.
[0045] Afterwards, the floating labels and the few remaining ultra-thin PET bottle flakes are transported to the semi-auger roller 10 through the discharge roller 7, and are transported to the water surface in the rear area of the tank body 2 by the semi-auger roller spiral blades 1002. Afterwards, the floating objects on the water surface in the rear area of the tank body 2 pass through the discharge roller 7 and the stirring and water-beating discharge combined roller 9 in turn, and flow to the label flotation material outlet 6 for discharge. The PET beverage bottle fragments at the bottom are discharged to the discharge port and enter the dehydration device to become high-quality products with controllable impurity content.
[0046] The inside of the material barrel of this embodiment is a material-pickling wing driven by a motor, which rotates at high speed to allow the incoming bottle pieces to fully contact with water, remove bubbles, and the PET bottle pieces sink, while the PP, PE bottle caps and label paper rise. Then, the bottles are poured into the left end of the tank body 2.
[0047] The partition plate 4 of this embodiment can guide the floating ultra-thin PET bottle flakes to prevent the ultra-thin PET bottle flakes in the front end area of the trough body 2 from drifting directly to the label flotation material outlet 6. The damping plate 5 of this embodiment can prevent a large number of ultra-thin PET bottle flakes that have just entered from the left side from flowing directly out of the label flotation material outlet 6.
[0048] In this embodiment, after the above-mentioned multiple high-intensity downward pressing, the proportion of ultra-thin PET bottle flakes in the waste finally discharged can be reduced to the minimum.
[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the present invention by ordinary technicians in the field should be included in the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.
Claims
1. A label flotation separation water washing system for recycling and rinsing PET bottle flakes, comprising a support (1), a tank body (2) and a plurality of nip rollers mounted on the tank body (2), characterized in that: The support (1) is installed on the ground, and the trough body (2) is supported on the support (1); a walking support is installed on one side of the top of the support (1) to facilitate staff to observe and inspect the internal structure of the trough body (2); The tank body (2) is a shell structure with a narrow bottom and a wide top. A plurality of conveying augers (3) are arranged side by side at the bottom of the tank body (2). A partition plate (4) is vertically fixed at the middle of the tank body (2). The partition plate (4) divides the internal space of the tank body (2) into two areas, front and rear. The tank body (2) in the rear area is provided with a label flotation material outlet (6). A damping plate (5) is vertically fixed to the left of the label flotation material outlet (6). The plurality of press rollers are evenly arranged from left to right on the top of the tank body (2); the plurality of press rollers include three discharge rollers (7), one discharge auger combination roller (8), four stirring and water-splashing discharge combination rollers (9) and one semi-auger roller (10); two discharge rollers (7) are rotatably mounted side by side at the leftmost end of the top of the tank body (2); a discharge auger combination roller (8) is rotatably mounted on the right side of the discharge roller (7); four stirring and water-splashing discharge combination rollers (9) are rotatably mounted side by side at the right end of the discharge auger combination roller (8); the rightmost two of the four stirring and water-splashing discharge combination rollers (9) are arranged in the opposite direction to the leftmost two; the right end of the stirring and water-splashing discharge combination roller (9) is rotatably mounted with the discharge roller (7); a semi-auger roller spiral blade is rotatably mounted on the rightmost end of the top of the tank body (2); one end of all the press rollers is connected to the drive motor through a transmission mechanism.
2. The label flotation separation and washing system for recycling and rinsing PET bottle flakes according to claim 1 is characterized in that: The discharge roller (7) comprises a discharge roller shaft (701) rotatably connected to the trough body (2), a plurality of rectangular strips being evenly radiated and fixed on the discharge roller shaft (701) as discharge roller ribs (702), and a plurality of through holes being evenly opened on the discharge roller ribs (702).
3. The label flotation separation and washing system for recycling and rinsing PET bottle flakes according to claim 1 is characterized in that: The discharging auger combination roller (8) comprises a discharging auger combination roller shaft (801) rotatably connected to the trough body (2); the front half of the discharging auger combination roller shaft (801) is provided with a discharging auger combination roller rib plate (802); the rear half of the discharging auger combination roller shaft (801) is provided with a discharging auger combination roller spiral blade (803); the discharging auger combination roller (8) is mounted on the left side of the damping plate (5); the discharging auger combination roller spiral blade (803) on the rear half of the discharging auger combination roller shaft (801) is close to the left side of the damping plate (5).
4. The label flotation separation and washing system for recycling and rinsing PET bottle flakes according to claim 1 is characterized in that: The stirring, water-splitting and discharging combined roller (9) comprises a stirring, water-splitting and discharging combined roller rotating shaft (901) rotatably connected to the tank body (2); a plurality of stirring, water-splitting and discharging combined roller rotating shaft (901) is evenly radiated and fixed with a plurality of stirring, water-splitting and discharging combined roller ribs (903) are evenly radiated and fixed with a plurality of stirring, water-splitting and discharging combined roller ribs (903) are evenly radiated and fixed with a plurality of stirring, water-splitting and discharging combined roller ribs (903); the two stirring, water-splitting and discharging combined rollers (9) close to the discharging auger combined roller (8) are arranged in such a direction that the ends of the stirring, water-splitting and discharging combined rollers (902) are located in the front part area of the tank body (2); and the remaining two stirring, water-splitting and discharging combined rollers (9) are arranged in such a direction that the ends of the stirring, water-splitting and discharging combined rollers (9) are located in the rear part area of the tank body (2).
5. The label flotation separation and washing system for recycling and rinsing PET bottle flakes according to claim 1 is characterized in that: The semi-auger roller (10) comprises a semi-auger roller shaft (1001) rotatably connected to the tank body (2); the front half of the semi-auger roller shaft (1001) is provided with a semi-auger roller spiral blade (1002); the rear half is an optical axis; one end of the semi-auger roller shaft (1001) provided with the semi-auger roller spiral blade (1002) is arranged in the front area of the tank body (2).
6. The label flotation separation and washing system for recycling and rinsing PET bottle flakes according to claim 1, characterized in that: Two material-beating barrels are arranged on the upper left side of the tank body (2), and the interior of the material-beating barrels is a mixer structure, so that the PET flat sheet is fully in contact with water and bubbles are discharged.