CN105058626A - Waste plastic bottle processing system with high cleanliness and method thereof - Google Patents

Abstract

The invention discloses a waste plastic bottle processing system with high cleanliness and a method thereof, comprising a plastic bottle input mechanism, a washing mechanism, a manual sorting table, a label removing machine, a bottle label separating machine, multiple fans, a net block, and a steel plate wall , pulverizer, cold water sedimentation tank, cleaning boiler with internal heating alkaline water or high-efficiency cleaning agent, centrifugal dehydrator, hydraulic separation tank and multiple screw conveyors; the manual sorting table includes the first manual sorting table, the second artificial A sorting platform and a third manual sorting platform; the centrifugal dehydrator includes a first centrifugal dehydrator and a second centrifugal dehydrator. After washing, sorting, delabeling, crushing, sedimentation, drying and other processes, the plastic bottles are processed into clean plastic sheets and packed into bags. The waste plastic bottle processing system with high cleanliness of the present invention has the advantages of high whiteness and cleanliness of plastic bottle fragments, convenient and fast transport of plastic bottles on site, good drying effect of plastic bottle fragments and the like.

Description

A waste plastic bottle processing system and method thereof with high cleanliness

technical field

The invention relates to a waste plastic bottle processing system with high cleanliness, in particular to a waste plastic bottle processing system with high cleanliness for cleaning, removing labels and crushing waste plastic bottles.

Background technique

At present, most beverage bottles on the market are plastic bottles. Plastic bottles are mainly made of materials such as polyethylene or polypropylene with the addition of various organic solvents. Polyester (PET), polyethylene (PE) and polypropylene (PP) are widely used as raw materials for plastic bottles. After adding corresponding organic solvents, after high temperature heating, they are blown, extruded, or injection molded through plastic molds. plastic container. It is mainly used for liquid or solid disposable plastic packaging containers for beverages, food, pickles, honey, dried fruits, edible oil, agricultural and veterinary drugs, etc. Plastic bottles have the characteristics of unbreakable, low cost, high transparency, and food-grade raw materials.

As we all know, waste plastic bottles can be recycled and reused. An industrial chain of waste plastic bottle recycling can reflect the comprehensive situation of a society in many aspects such as garbage classification, waste recycling, environmental protection law, policy support and public awareness. When the life of recycling companies improves, it will be the time when the foundation of a low-carbon society will be stabilized. At present, plastic bottle recycling factories mostly use modern assembly lines to clean, delabel (peel off the plastic label of the plastic bottle shell) and crush the waste plastic bottles, and separate the bottle body, trademark skin, bottle cap, etc. of the plastic bottle , crush the bottle body and send it back for further processing.

The Chinese invention patent with the application number 200510119025.4 proposes a plastic bottle recycling system, which includes an unpacking and washing unit; a PVC label scraping unit connected to the unpacking and washing unit; a crushing unit connected to the PVC label scraping unit. In addition to the unit; and a water medium gravity separation unit connected to the crushing unit, the advantages are: the overall structure is simple, easy to operate, through the introduction of the system, the recycling of plastic bottles can be completed with the least manpower, and even with an automated process, so as to Comply with the economic principles of recycling. However, in the actual work process, in the process of plastic bottle recycling, there are difficulties in removing the label, the bottle body and the bottle cap are easily scratched together when removing the label, and the crushed fragments are easy to dry when dehydrated in the separator. Bonding and other issues. Once the bottle cap is scratched, it is easy to fall off early and mix with the bottle body, making it difficult to sort.

In addition, in plastic bottle recycling factories, there are generally multiple stacking places. However, the entrance of the recycling system generally has a fixed position, and it requires a lot of manpower and material resources to transport it from the stacking place to the entrance of the recycling system, and the production cost is relatively high.

After the existing plastic bottles are crushed, they often need to be cleaned many times. If the cleaning effect is not good, there will be oil stains left on the fragments, or the fragments may be polluted with other colors, yellow or black, and the cleanliness is not high.

Contents of the invention

The present invention is to avoid the disadvantages of the above-mentioned prior art and provide a waste plastic bottle processing system with high cleanliness to solve the problem that the existing plastic bottle recycling system is not clean and the plastic fragments tend to turn yellow or black , The crushed plastic sheets are easy to stick when dehydrated and dried.

The present invention adopts the following technical solutions to solve the technical problems.

A waste plastic bottle processing system with high cleanliness. Its structural features include a plastic bottle input mechanism 1, a washing mechanism 3, a manual sorting table, a label removal machine 5, a bottle label separator 6, multiple fans 20, and a crushing machine. machine 12, cold water sedimentation tank 13, cleaning boiler 14, centrifugal dehydrator, hydraulic separation tank and a plurality of screw conveyors 21; the manual sorting platform includes the first manual sorting platform 4, the second manual sorting platform 9 And the 3rd manual sorting table 11; Described centrifugal dehydrator comprises first centrifugal dehydrator 15 and second centrifugal dehydrator 18;

The plastic bottle input mechanism 1 is connected with the washing mechanism 3 through a screw conveyor 21, and the outlet of the washing mechanism 3 is located at the input end of the conveyor belt of the first manual sorting platform 4. Above; the first manual sorting station 4 is connected to the label removing machine 5 through a screw conveyor 21 and a conveying pipeline, and the label removing machine 5 is directly connected to the bottle label separator 6; the bottle label The separator 6 and the upper part are provided with a horizontal wind blower for blowing out the label paper, and the lower part of the bottle label separator 6 is provided with a blower for blowing the plastic bottles falling in the bottle label separator 6 to the unloading cage 7 fan 20;

A first drop bottle opening 701 is provided below the side of the wind unloading cage 7 away from the bottle label separator 6; a plastic box for dropping the first drop bottle opening 701 is provided below the first drop bottle opening 701. The bottle is sent to the screw conveyor 21 of the second manual sorting platform 9; a plastic bottle for dropping the outlet end of the second manual sorting platform 9 is provided below the outlet end of the second manual sorting platform 9 The blower fan 20 blowing to the air discharge bin 10 through the feeding cylinder 23, the feeding cylinder outlet 2301 of the feeding cylinder 23 is inserted in the air discharging bin 10, and the air discharging bin 10 is far away from the second manual sorting The side wall on one side of the table 9 is a steel plate wall 1002, and a block 1001 is provided between the steel plate wall 1002 and the outlet 2301 of the feeding cylinder;

A second bottle dropping port 1003 is provided below the position between the block 1001 and the feeding cylinder outlet 2301 of the air unloading bin 10, and a screw conveyor 21 is provided below the second bottle dropping port 1003. The screw conveyor 21 is used to transfer the plastic bottles dropped from the second bottle drop port 1003 to the third manual sorting table 11;

The outlet end of the third manual sorting table 11 is connected with the pulverizer 12, and the plastic bottle is sent into the pulverizer 12; a bottom of the pulverizer 12 is provided with a plastic bottle fragment for sending the pulverized plastic bottle fragments into the cold water. The screw conveyor 21 of the sedimentation tank; the cold water sedimentation tank 13 is connected with the cleaning boiler 14 through a screw conveyor 21 and a delivery pipeline, and the plastic bottle fragments deposited in the cold water sedimentation tank 13 are sent to the cleaning boiler 14 for washing;

Caustic soda is added to the hot water in the cleaning boiler 14; the cleaning boiler 14 is connected with the first centrifugal dehydrator 15 through a screw conveyor 21 and a delivery pipeline, and the first centrifugal dehydrator 15 is provided with a useful The cold water pipe 25 for adding cold water to the first centrifugal dehydrator 15; the dehydrated plastic fragments in the first centrifugal dehydrator 15 are sent to the hydraulic separation tank by wind force, and the hydraulic separation tank is conveyed by a screw The machine 21 and the delivery pipeline are connected with the second centrifugal dehydrator 18 and send the plastic fragments cleaned by the hydraulic separation tank into the second centrifugal dehydrator 18; the second centrifugal dehydrator 18 sends the dehydrated fragments to Into the debris output pipe 24, the outlet of the debris output pipe 24 is provided with a packaging bag 19 for collecting and packaging the plastic fragments;

Described hydraulic separation tank comprises first hydraulic separation tank 16 and second hydraulic separation tank 17; Between described first hydraulic separation tank 16 and described second hydraulic separation tank 17, pass a screw conveyer 21 and conveying pipeline to communicate connect.

The structural features of the waste plastic bottle processing system with high cleanliness of the present invention also lie in:

The plastic bottle input mechanism 1 is a conveyor belt or a roller conveyor, and a roll unpacking machine 2 is arranged between the plastic bottle input mechanism 1 and the washing mechanism 3 .

Both sides of the plastic bottle input mechanism 1 are provided with guardrails 101 .

A mixer 27 is arranged on the cleaning boiler 14 .

The hydraulic separation tank includes a pool body 28 filled with clear water, an agitator 27 is arranged on the top of the pool body 28 close to the fragment inlet, and a horizontal screw conveyor is arranged on the outside of the end of the pool body 28 away from the fragment inlet. Rod 29; the bottom of the pool body 28 is provided with a longitudinal screw conveyor rod 30 extending and transmitting along the length direction of the pool body 28; A plurality of water-repelling mechanisms 31 are arranged between the rods 29 .

The waste plastic bottle processing system with high cleanliness also includes a plastic bottle remote transmission mechanism; the plastic bottle remote transmission mechanism includes a plurality of transmission units, each transmission unit includes a fan 20 and a transmission pipeline 22, adjacent to each other The transmission pipe 22 of the transmission unit is connected.

The invention also provides a processing method of a waste plastic bottle processing system with high cleanliness.

A plastic bottle treatment method of the waste plastic bottle treatment system with high cleanliness comprises the following steps:

Step 1: plastic bottle input step;

Step 2: Plastic bottle hot water washing step;

Step 3: First sorting step:

Step 4: Plastic bottle delabeling and sorting step;

Step 5: a heavy impurity removal step;

Step 6: the second manual sorting step;

Step 7: a small impurity removal step;

Step 8: the third manual sorting step;

Step 9: plastic bottle crushing step;

Step 10: a step of washing plastic fragments, including a step 101 of washing plastic fragments in cold water and a step 102 of washing plastic fragments in hot water;

Step 101: the step of washing plastic fragments in cold water;

Step 102: the step of washing plastic fragments in hot water;

Step 11: a dehydration step of the plastic fragments;

Step 12: the step of removing light impurities in the plastic fragments;

Step 13: Secondary dehydration and subpackaging of plastic chips.

In said step 4, the process of introducing high-temperature steam is included.

In the hot water washing step of the plastic fragments in step 102, alkaline water is added to the hot water.

Compared with the prior art, the beneficial effects of the present invention are reflected in:

A waste plastic bottle treatment system with high cleanliness of the present invention includes a plastic bottle input mechanism, a washing mechanism, a manual sorting table, a label removing machine, a bottle label separator, multiple fans, a net block, a steel plate wall, a shredder, Cold water sedimentation tank, cleaning boiler, centrifugal dehydrator, hydraulic separation tank and multiple screw conveyors; the manual sorting platform includes a first manual sorting platform, a second manual sorting platform and a third manual sorting platform; The centrifuge includes a first centrifuge and a second centrifuge. After washing, sorting, delabeling, crushing, sedimentation, drying and other processes, the plastic bottles are processed into clean plastic sheets and packed into bags.

Caustic soda is added to the cleaning boiler to keep the pH value in the cleaning boiler between 9.5-10.5, which is more conducive to removing the grease and pollution color on the plastic debris, making the plastic debris clean and bright.

By setting up two hydraulic separation pools, two water washings and impurity separation, including three manual sorting, two winnowing, one screening, and multiple water washing steps, the various types (different sizes, materials) commonly found in waste plastic bottles , color, etc.) impurities or sundries are corresponding to special removal steps. Plastic bottles are cleaned with hot alkaline water and washed with clean water several times. Therefore, the final plastic fragments have low impurity content and the cleanliness of the flakes is very high. high.

The waste plastic bottle processing system with high cleanliness of the present invention has the advantages of high whiteness and cleanliness of plastic bottle fragments, convenient and fast transport of plastic bottles on site, good drying effect of plastic bottle fragments and the like.

Description of drawings

Fig. 1 is a schematic diagram 1 of a waste plastic bottle treatment system with high cleanliness according to the present invention.

Fig. 2 is a second schematic diagram of a waste plastic bottle processing system with high cleanliness according to the present invention.

Fig. 3 is a schematic diagram 3 of a waste plastic bottle processing system with high cleanliness according to the present invention.

Fig. 4 is a schematic diagram 4 of a waste plastic bottle processing system with high cleanliness according to the present invention.

Fig. 5 is a schematic diagram of a hydraulic separation tank of a waste plastic bottle treatment system with high cleanliness according to the present invention.

Fig. 6 is a front view of the longitudinal screw conveying rod of the hydraulic separation tank in Fig. 5 .

Fig. 7 is a left side view of the longitudinal screw conveying rod of the hydraulic separation tank in Fig. 6 .

Fig. 8 is a schematic diagram of a plastic bottle remote transmission mechanism of a waste plastic bottle processing system with high cleanliness according to the present invention.

Numbers in attached drawings 1-8: 1 plastic bottle input mechanism, 101 protective fence, 2 roll unpacking machine, 3 washing mechanism, 4 first manual sorting table, 5 delabeling machine, 501 high temperature steam input pipe, 6 bottle label Separator, 7 air unloading cage, 701 first bottle drop, 8 rolling screen, 9 second manual sorting table, 10 unloading bin, 1001 block, 1002 steel plate wall, 1003 second bottle drop, 11 third manual Sorting table, 12 pulverizer, 13 cold water sedimentation tank, 14 cleaning boiler, 15 first centrifugal dehydrator, 16 first hydraulic separation tank, 17 second hydraulic separation tank, 18 second centrifugal dehydrator, 19 packing bag, 20 Fan, 21 screw conveyor, 22 transmission pipe, 23 feeding barrel, 2301 feeding barrel outlet, 24 debris output pipe, 25 cold water pipe, 26 water storage tank, 27 mixer, 28 pool body, 29 horizontal screw conveying rod, 30 vertical screw Conveying rod, 31 water-repelling mechanism, 3101 rotating shaft, 3102 water-repelling sheet, 32 rod body, 33 helical sheet, 34 large and heavy impurity pools, 35 small impurity pools.

The present invention will be further described below through specific embodiments and in conjunction with the accompanying drawings.

Detailed ways

Referring to Figures 1-8, a waste plastic bottle processing system with high cleanliness of the present invention includes a plastic bottle input mechanism 1, a washing mechanism 3, a manual sorting table, a label removing machine 5, a bottle label separator 6, a plurality of Fan 20, pulverizer 12, cold water sedimentation tank 13, cleaning boiler 14, centrifugal dehydrator, hydraulic separation tank and a plurality of screw conveyors 21; described manual sorting platform includes the first manual sorting platform 4, the second artificial sorting platform Sorting platform 9 and the third artificial sorting platform 11; the centrifugal dehydrator includes a first centrifugal dehydrator 15 and a second centrifugal dehydrator 18;

The plastic bottle input mechanism 1 is connected with the washing mechanism 3 through a screw conveyor 21, and the outlet of the washing mechanism 3 is located at the input end of the conveyor belt of the first manual sorting platform 4. Above; the first manual sorting station 4 is connected to the label removing machine 5 through a screw conveyor 21 and a conveying pipeline, and the label removing machine 5 is directly connected to the bottle label separator 6; the bottle label The separator 6 and the upper part are provided with a horizontal wind blower for blowing out the label paper, and the lower part of the bottle label separator 6 is provided with a blower for blowing the plastic bottles falling in the bottle label separator 6 to the unloading cage 7 fan 20;

A first drop bottle opening 701 is provided below the side of the wind unloading cage 7 away from the bottle label separator 6; a plastic box for dropping the first drop bottle opening 701 is provided below the first drop bottle opening 701. The bottle is sent to the screw conveyor 21 of the second manual sorting platform 9; a plastic bottle for dropping the outlet end of the second manual sorting platform 9 is provided below the outlet end of the second manual sorting platform 9 The blower fan 20 blowing to the air discharge bin 10 through the feeding cylinder 23, the feeding cylinder outlet 2301 of the feeding cylinder 23 is inserted in the air discharging bin 10, and the air discharging bin 10 is far away from the second manual sorting The side wall on one side of the table 9 is a steel plate wall 1002, and a block 1001 is provided between the steel plate wall 1002 and the outlet 2301 of the feeding cylinder;

A second bottle dropping port 1003 is provided below the position between the block 1001 and the feeding cylinder outlet 2301 of the air unloading bin 10, and a screw conveyor 21 is provided below the second bottle dropping port 1003. The screw conveyor 21 is used to transfer the plastic bottles dropped from the second bottle drop port 1003 to the third manual sorting table 11;

The outlet end of the third manual sorting table 11 is connected with the pulverizer 12, and the plastic bottle is sent into the pulverizer 12; a bottom of the pulverizer 12 is provided with a plastic bottle fragment for sending the pulverized plastic bottle fragments into the cold water. The screw conveyor 21 of the sedimentation tank; the cold water sedimentation tank 13 is connected with the cleaning boiler 14 through a screw conveyor 21 and a delivery pipeline, and the plastic bottle fragments deposited in the cold water sedimentation tank 13 are sent to the cleaning boiler 14 for washing;

Caustic soda is added to the hot water in the cleaning boiler 14; the cleaning boiler 14 is connected with the first centrifugal dehydrator 15 through a screw conveyor 21 and a delivery pipeline, and the first centrifugal dehydrator 15 is provided with a useful The cold water pipe 25 for adding cold water to the first centrifugal dehydrator 15; the dehydrated plastic fragments in the first centrifugal dehydrator 15 are sent to the hydraulic separation tank by wind force, and the hydraulic separation tank is conveyed by a screw The machine 21 and the delivery pipeline are connected with the second centrifugal dehydrator 18 and send the plastic fragments cleaned by the hydraulic separation tank into the second centrifugal dehydrator 18; the second centrifugal dehydrator 18 sends the dehydrated fragments to Into the debris output pipe 24, the outlet of the debris output pipe 24 is provided with a packaging bag 19 for collecting and packaging the plastic fragments;

Described hydraulic separation tank comprises first hydraulic separation tank 16 and second hydraulic separation tank 17; Between described first hydraulic separation tank 16 and described second hydraulic separation tank 17, pass a screw conveyer 21 and conveying pipeline to communicate connect.

Fig. 1-4 is a schematic diagram of the waste plastic bottle processing system with high cleanliness of the present invention, and the structures in Fig. 1-4 are connected front and back. The waste plastic bottle processing system with high cleanliness includes a plastic bottle input mechanism, a washing mechanism, a manual sorting table, a label removing machine, a bottle label separator, multiple fans, a screen block, a steel plate wall, and a shredder arranged in series in sequence. , cold water sedimentation tank, cleaning boiler, centrifugal dehydrator, hydraulic separation tank and multiple screw conveyors, the adjacent equipment is transmitted to each other by wind or through screw conveyors, until finally the recycled plastic bottles are transformed into Packaged in clean plastic shreds.

The plastic bottle input mechanism is used to transport plastic bottles, which is the entrance and beginning of the whole processing system. A single plastic bottle or a package of plastic bottles is input, and then divided into individual bottles after unpacking, and then enters the washing mechanism for washing.

The washing mechanism is a drum washing mechanism, in which a plurality of tabs extending inward along the inner wall of the drum are arranged. The protruding piece has a certain thickness, so it does not have a cutting function, but because the protruding piece is provided, the impact between the convex piece and the plastic bottle can be improved, and the adhesion sundries on the outer wall of the plastic bottle body can be removed. The water added in the drum washing mechanism is hot water, and the hot water is used for washing sundries or oil stains on the outer wall of the plastic bottle body.

A water reservoir with thermal insulation performance is arranged below the drum type washing mechanism. Washed hot water used in the drum washing mechanism flows into the reservoir. A water heater is provided on one side of the drum washing mechanism, and the water heater is provided with an outer layer and an inner layer. A heating device is arranged in the inner layer of the water heater. The waste hot water in the reservoir is input into the inner and outer layers of the water heater through a pipeline, and together with the heating device, it heats the cold water in the inner layer, realizing the recycling of hot water, saving energy, and improving the The environmental protection performance of the waste plastic bottle treatment system with high cleanliness of the present invention. Arrow A2 in Fig. 1 is the hot water adding direction.

There are staff on both sides of the conveyor belt of the first manual sorting station to carry out the first manual sorting process: the rough inspection process is used to sort obvious sundries such as iron wires and large bottles. A high-temperature steam input pipe is provided on the conveying pipeline between the first manual sorting table and the delabeling machine to heat and soften the plastic bottles in the conveying pipeline. Arrow A3 in Figure 1 is the direction in which high-temperature steam is introduced.

A high-temperature steam input pipe 501 is provided on the delivery pipeline between the first manual sorting table 4 and the delabeling machine 5 for heating and softening input plastic bottles and bottle caps. An insulation layer is arranged on the conveying pipeline. The plastic bottle cap is heated and softened by high-temperature steam, so as to prevent the hard bottle cap from colliding with the blade in the demarking machine, causing the bottle cap to be cut and fall off from the bottle body. Once the bottle cap falls off, it will affect the next bottle label separation process. If it is not heated, the gap between the cutters of the label stripping machine is used for label stripping, and the diameter of the bottle cap is larger than the distance between the cutters, which will cause the bottle mouth to break and cause waste of raw materials. After heating and softening, the bottle cap is not easy to break.

The bottle label separator is used to separate the stripped label paper from the bottle body, and it adopts the wind separation method. Because the weight difference between the label paper and the bottle body is relatively large, a horizontal horizontal wind force is set at the outlet of the label removing machine. The bottle body falls down under its own weight, and the blown away label paper falls into the label paper packaging bag or holding pool. The arrow A4 in Fig. 2 is the wind direction of the horizontal wind force, and the arrow A5 in Fig. 2 is the falling direction of the bottle body. A powerful blower is installed under the bottle label separator, which blows the delabeled plastic bottles falling from the bottle label separator into the unloading cage. Arrow A6 among Fig. 2 is the blowing direction of powerful blower. Just below the unloading cage is provided with a chunky heavier impurity pool 34.

In the air unloading cage, the wind force is preset, and the plastic bottle is blown to the barbed wire on the side away from the pipeline inlet, and then falls from the first bottle drop. The heavier impurities do not blow to the drop bottle mouth and fall down due to the limited wind force, and fall into the heavier impurities pool 34 from the impurity outlet. The plastic bottle that falls from the first bottle drop enters a rolling sieve 8, and by the rotation of the rolling sieve 8, small impurities in the plastic bottle are screened out. The outlet of the rolling screen 8 is provided with a screw conveyor and a conveying pipeline, and the screw conveyor sends the plastic bottles to the second manual sorting table, and the plastic bottles are manually sorted by the staff on the second manual sorting table. Sorting process, this process is mainly to sort out the label paper or the plastic bottle without the label paper, pick out the label paper or send the plastic bottle without the label back to the plastic bottle input mechanism for further processing.

After the second manual sorting, the plastic bottles fall from the exit of the conveyor belt of the second manual sorting station to a wind transmission mechanism, and the plastic bottles are blown up by strong wind and then enter the unloading bin. The arrow A7 in Fig. 2 is the direction of blowing, and the plastic bottle is blown into the unloading chamber. There is a block in the unloading chamber, which stops the plastic bottle and then falls. Tiny sundries just pass through the block, are blocked by the steel plate wall and fall, and fall into the tiny sundries pool 35. The plastic bottles falling from the air unloading bin are transported to the third manual sorting table through the screw conveyor and the conveying pipeline, and the third manual sorting process is performed on the plastic bottles by the staff on the third manual sorting table. It is mainly to sort out plastic bottles whose material and color do not meet the requirements, so that the plastic bottles with the same material and color will enter the next step of crushing process.

After the third manual sorting, the plastic bottles enter the shredder, which crushes the plastic bottles into plastic pieces. Then it is transported to the cold water sedimentation tank through the screw conveyor and the conveying pipeline, and the fragments are washed and settled, and the lighter sundries and unsorted label paper will float on the water surface and be separated. The washed fragments are transported to the cleaning boiler through the screw conveyor and the conveying pipeline, and the hot water of 80-100 ℃ is used to wash the fragments in the cleaning boiler, and alkaline water is added to the hot water; the arrow A8 in Fig. 3 is Alkaline water addition directions. Add caustic soda NaOH and high-efficiency cleaning agent to the cleaning boiler to achieve the purpose of cleaning, and can decolorize and decontaminate plastic fragments. The effect of caustic soda is to completely degrease the dirty bottles; if no caustic soda is added, the dirty bottles will turn yellow and affect the quality. The combination of the two can make the produced products white and translucent. The specific amount is increased or decreased by the staff according to the visual inspection and the baked product. If the raw material is dirty, it can be increased appropriately to ensure the quality of the product. High-efficiency cleaning agents are common liquid detergents or laundry detergents on the market.

The fragments washed with hot alkaline water are transported to the first centrifugal dehydrator through the screw conveyor and the conveying pipeline, and are spin-dried in the first centrifugal dehydrator. A cold water pipe is arranged on the first centrifugal dehydrator, and a large amount of cold water is added into it, and the cold water is used to reduce the temperature of the plastic fragments from 80-100°C to about 20-40°C for drying. The cold water pipe is placed at the entrance of the plastic fragments, the temperature is lowered first and then dried. The arrow A9 in Figure 4 is the direction of adding cold water. A water outlet is provided below the first centrifugal dehydrator, and a water storage tank 26 is arranged below the water outlet for recovering the medicinal solution after washing in the first centrifugal dehydrator. A10 in FIG. 4 is the outflow direction of the medicinal solution. The first centrifugal dehydrator dehydrates the fragments with drugs, so as to achieve the purpose of reusing the drug water, and the second washing effect is better.

The effect of adding caustic soda and high-efficiency cleaning agent to the hot water for cleaning the boiler is to remove the stain and grease on the plastic fragments, making the plastic fragments white and clean, and achieving the purpose of cleaning. The pH of hot water is preferably 9.5-10.5, and about 10±0.2 is the best. Alternatively, add commercially available liquid detergent at the same time. Proportional use of caustic soda and cleaning agent: the effect of caustic soda is to completely degrease the dirty bottle; if no caustic soda is added, the dirty bottle will turn yellow and affect the quality. The ratio of the two can make the production The product is white and translucent. The dosage should be increased or decreased according to the visual inspection and the product after baking. The usage is to add it in time intervals during production to ensure the concentration of the drug and achieve the purpose of cleaning.

The dried plastic fragments are transported by wind to the hydraulic separation tank. In the water separation tank, there are mixers, horizontal screw conveying rods, vertical screw conveying rods and multiple water-draining mechanisms. In addition to cleaning and transporting plastic debris, it can also effectively remove floating debris on the water surface.

The plastic fragments processed by one or two hydraulic separation tanks enter the second centrifugal dehydrator. The second centrifugal dehydrator can be provided with a cold water pipe, and a large amount of cold water can be added into it, and the cold water is used to wash the plastic fragments. A12 in FIG. 4 is the direction in which the washing wastewater flows out. The dried plastic fragments are output by wind power through a conveying pipeline, and then packed and packed in packaging bags before being transported to the waiting area for inspection. A11 in Fig. 4 is the blown direction of debris by wind force.

As shown in Figure 4, two hydraulic separation tanks are set, and the number of hydraulic separation tanks can be set to one, two or more according to the actual situation, so as to ensure that the debris is cleaned and the floating matter is removed. By setting up two hydraulic separation pools connected in series, the plastic fragments after the first dehydration are washed and precipitated twice, and the two hydraulic separation pools are clean cold water, thereby improving the cleanliness of plastic fragments and improving product quality. quality.

The waste plastic bottle treatment system with high cleanliness of the present invention processes the plastic bottles into clean plastic sheets and packs them into bags after washing, sorting, demarking, crushing, sedimentation, drying and other processes. The waste plastic bottle processing system with high cleanliness of the present invention has the advantages of good demarking effect, high sorting efficiency, convenient and fast transport of plastic bottles on site, good drying effect of plastic bottle fragments, and high cleanliness.

The plastic bottle input mechanism 1 is a conveyor belt or a roller conveyor, and a roll unpacking machine 2 is arranged between the plastic bottle input mechanism 1 and the washing mechanism 3 .

In the plastic bottle processing factory, there are single plastic bottles that need to be sent to the production line, and there are also plastic bottles that are bundled or bagged after being flattened. At the entrance of the plastic bottle input mechanism, the staff will send a single plastic bottle to the plastic bottle input mechanism. The plastic bottle bags bundled with packing belts or the plastic bottle bags packed in snakeskin bags are hoisted by a crane and directly sent to the roller unpacking machine. After unpacking, a single plastic bottle is sent to the washing mechanism. Arrow A1 among Fig. 1 represents the falling direction of plastic bottle bag. Individual plastic bottles can pass through the roller unpacking machine, but the bags are shredded by the unpacking machine, separating the bales of plastic bottles into individual ones.

In the prior art, the conveyor belt is used to directly send the plastic bottle into the washing mechanism. When the packaged plastic bottle needs to be packaged, the staff needs to unpack it before sending it in, and the work efficiency is low. In the present invention, the plastic bottle input mechanism and the roller type unpacking machine are arranged in front and behind, so that a single plastic bottle or a whole package of plastic bottles can be input, which improves the versatility and work efficiency.

Both sides of the plastic bottle input mechanism 1 are provided with guardrails 101 .

In the actual work process, sometimes the hoisted plastic bottle bag falls from a height on the plastic bottle input mechanism, and accidents of plastic bottles flying up and hurting people often occur. Protective fences are set on both sides of the plastic bottle input mechanism, which can prevent the plastic bottles from flying up and hurting people during the plastic bottle adding process, and improve the safety and reliability of the work.

A mixer 27 is arranged on the cleaning boiler 14 . Add a potion made of soda ash to hot water to remove oil and other dirt on plastic bottle fragments to keep the fragments clean. The blender is used to mix the debris and potion evenly, making the washing more thorough.

The hydraulic separation tank includes a pool body 28 filled with clear water, an agitator 27 is arranged on the top of the pool body 28 close to the fragment inlet, and a horizontal screw conveyor is arranged on the outside of the end of the pool body 28 away from the fragment inlet. Rod 29; the bottom of the pool body 28 is provided with a longitudinal screw conveyor rod 30 extending and transmitting along the length direction of the pool body 28; A plurality of water-repelling mechanisms 31 are arranged between the rods 29 .

As shown in FIG. 5 , the longitudinal screw conveying rod extends along the length direction L of the tank body and protrudes out of the tank body, and transmits the plastic fragments to the next hydraulic separation tank or the second centrifugal dehydrator. The horizontal spiral conveying rod is arranged along the width direction of the pool body, and is used for transporting out floating sundries such as bottle cap fragments and trademark paper fragments flushed out of the pool body.

The water-repelling mechanism includes a rotating shaft 3101 and a water-repelling sheet 3102 fixed on the rotating shaft. The rotating shaft is driven by the motor, and then drives the water-repelling sheet to repel water, so that the water on the water surface fluctuates forward, and the floating objects on the water surface are driven into the horizontal screw conveying rod, and then the floating objects are output by the horizontal screw conveying rod. As shown in FIG. 5 , the direction A13 is the rotation direction of the water-repellent piece.

The structures of the horizontal screw conveying rod and the longitudinal screw conveying rod are the same, and both are composed of a rod body 32 and a spiral piece 33 . The spiral piece 33 is fixed on the outer peripheral surface of the rod body 32, and the motor drives the rod body 32 to rotate, and then drives the plastic bottle or fragments to be transported forward.

Fig. 6 and Fig. 7 are the front view and the left side view of the transverse screw conveying rod and the longitudinal screw conveying rod. The rod bodies of the horizontal screw conveying rod and the longitudinal screw conveying rod are all placed horizontally, the axes of the two are perpendicular to each other, and the axes of the two are vertical lines of different planes. The longitudinal screw conveying rod is used to convey the washed plastic chips forward. The horizontal screw conveying rod is used to send the floating matter out from one side of the pool body, so as to avoid the accumulation of floating matter and affect the normal operation of the hydraulic separation pool.

The positions of the water-repelling sheets of two adjacent water-repelling mechanisms differ by 180°, that is, as shown in Figure 5, when one of the water-repelling sheets is in a vertical position and is on the water, the adjacent two water-repelling sheets are also in the vertical position. Upright position but underwater. Such a setting can make the front and rear water-removing actions exactly one in front and one in the back, which can make the water wave move forward more effectively, and send the floating objects into the horizontal screw conveying rod more effectively, thereby improving the cleaning efficiency and effect of floating objects .

The waste plastic bottle processing system with high cleanliness also includes a plastic bottle remote transmission mechanism; the plastic bottle remote transmission mechanism includes a plurality of transmission units, each transmission unit includes a fan 20 and a transmission pipeline 22, adjacent to each other The transmission pipe 22 of the transmission unit is connected.

As shown in Figure 8, the long-distance transmission mechanism for plastic bottles is composed of multiple transmission units connected in series. Transmission within the processing plant. The transmission unit is composed of a fan and the corresponding transmission pipeline. A storage tank for plastic bottles is set through the air outlet of the fan. The wind blows the plastic bottles in the storage tank and flies out of the transmission pipeline, and then falls from the outlet. to the holding pool of the next transmission unit, thus forming a relay-type wind power transmission system.

In the processing plant, there are often a large number of plastic bottles piled up. Sometimes they are stacked separately according to different categories. When a certain type of plastic bottle needs to be transported to the corresponding plastic bottle input mechanism, a lot of manpower and material resources are required for transportation. As shown in Figure 6, the long-distance transmission mechanism for plastic bottles is used for transportation, and it only needs to be equipped with fans and corresponding pipelines. When the journey is far away, it can also be equipped with multiple transmission units in series to form a multi-unit transmission mechanism, which can save a lot of manpower and material resources, save transmission time, and improve transmission efficiency. Only one or two people need to input plastic bottles to the fan at the initial end to realize the transmission, which reduces the labor intensity and avoids possible dangers in the transportation process, improving the safety and reliability of the waste plastic bottle processing system with high cleanliness sex.

A plastic bottle treatment method of the waste plastic bottle treatment system with high cleanliness comprises the following steps:

Step 1: Plastic bottle input step; in step 1, the staff will use a shovel and other tools to place a single plastic bottle on a plastic bottle input mechanism, such as a roller conveyor or a conveyor belt, and a single bottle will be transported by the roller conveyor. Or the conveyor belt is transported to the washing mechanism by a screw conveyor. If a roll-type unpacking machine is also arranged between the plastic bottle input mechanism and the washing mechanism, the staff will send the packed plastic bottles into the roll-type unpacking machine through devices such as cranes. Only a single plastic bottle flows out of the roller unpacking machine, and then it is transported to the washing mechanism by the screw conveyor.

Step 2: The step of hot water washing of plastic bottles; the screw conveyor in step 1 sends a single plastic bottle into the washing mechanism, and the washing mechanism is preferably a drum washing machine. The water added to the drum washing machine is hot water, and the drum washing machine washes the plastic bottles by rotating to wash off the dirt on the body, cap and label paper of the plastic bottles. Step 2 includes the hot water recovery and reuse process: the waste hot water flowing out from the washing mechanism is re-introduced into the heating furnace to reheat the cold water, so as to achieve the effect of heat energy reuse.

Step 3: The first sorting step: the plastic bottles washed in step 2 will fall from the outlet of the washing mechanism onto the first manual sorting table, and the staff will sort them manually, and the iron wires, large bottles, etc. in the plastic bottles will be sorted manually. The debris is sorted out. The first manual sorting station includes a conveyor belt, which sends the sorted plastic bottles to the demarking machine through a screw conveyor.

Step 4: Plastic bottle delabeling and sorting step; the plastic bottle sent by the screw conveyor in step 3 is input to the delabeling machine, and the label paper on the bottle body is removed in the delabeling machine, and then the bottle and the bottle after the label paper is removed The label paper is fed into the bottle label sorting machine together, and the label paper and the bottle body are separated by winnowing; the wind blows the lighter label paper from the upper end of the bottle label sorter, and the bottle body falls freely into a holding pool. There is a fan in the holding tank, which blows the demarked plastic bottles into the unloading cage to remove heavy impurities;

Step 5: The heavy impurity removal step; the plastic bottles and a large number of sundries removed in step 4 are blown up by the fan, and enter the air discharge cage through the pipe, and the wind force is reduced in the air discharge cage, and the plastic bottles and sundries are blown Enter and unload the air cage. The unloading cage is a wire frame closed on all sides, and there are two outlets below. The side close to the bottle label sorter is the outlet for heavier impurities, and the side away from the bottle label sorter is the bottle outlet. The plastic bottle is blown far away by the wind, and after hitting the wire mesh of the unloading cage, the speed is reduced to 0 and then falls, falling from the first bottle drop into the rolling sieve. Due to the limited wind power, heavier impurities just cannot be blown onto the barbed wire, and fall in the heavier impurity pool 34 from the heavier impurity outlet on the way.

Step 6: the second manual sorting step; the plastic bottles dropped in step 5 fall into the rolling screen 8, and the screw conveyor at the outlet of the rolling screen sends the plastic bottles to the second manual sorting table; the steps 5 and 6 includes a rolling screening step, which is completed by the rolling screen 8, and the impurities whose diameter is smaller than the sieve hole of the rolling screen will be filtered out and then fall into the impurity pool. In the second manual sorting, the staff checks out the plastic bottles that have not been stripped of the label paper, and after sorting, they are sent to step 4 to remove the label again. The second manual sorting station includes a conveyor belt, which sends the sorted plastic bottles to the unloading bin through the fan to remove fine impurities;

Step 7: Fine impurities removal step; the plastic bottle in step 6 is blown by the fan at high speed, blown into the air discharge bin through the feeding cylinder; the plastic bottle is hit by the wind and falls on the block, and the fine impurities pass through the block and hit the steel plate Falling off the wall. The mesh size of blocking net is greater than the mesh size of rolling screen 8. The plastic bottles fall through the second bottle drop below the block, and the plastic bottles are sent to the third manual sorting table by the screw conveyor. The fine impurities then fall into the fine impurity pool 35 .

Step 8: The third manual sorting step; the plastic bottles in step 7 are sent to the conveyor belt of the third manual sorting station, and the staff sorts them according to the color and material of the plastic bottles, so that the plastic bottles that flow into step 9 for crushing Plastic bottles are plastic bottles of the same material and color.

Step 9: plastic bottle crushing step; crush the plastic bottle and send it to the cold water sedimentation tank and cleaning boiler for sedimentation and preliminary washing;

Step 10: the step of washing the plastic fragments, including the step 101 of washing the plastic fragments in cold water and the step 102 of washing the plastic fragments in hot water; the plastic fragments obtained in step 9 are washed in cold water and hot water;

Step 101: the step of washing plastic fragments in cold water; the plastic fragments obtained in step 9 are precipitated and washed in a cold water sedimentation tank, and the bottom of the cold water sedimentation tank is provided with a screw conveyor, and the plastic fragments at the bottom of the sedimentation are transferred to the cleaning boiler;

Step 102: hot water washing step for plastic fragments; wash the fragments with 80-100°C hot water in the cleaning boiler, add alkaline water to the hot water, stir and mix the plastic fragments and alkaline water with a mixer, and use alkaline water Wash and decolorize plastic debris.

Step 11: A dehydration step of the plastic fragments; dehydrating the plastic fragments washed in step 10, and then blowing the plastic fragments into the hydraulic separation tank by wind. In the hot water washing step of step 102, a liquid medicine made of soda ash is added. Add cold water to the entrance of the plastic sheet of the first centrifugal dehydrator, cool, wash and dehydrate the plastic fragments entering the first centrifugal dehydrator, wash the medicine added in the hot water washing step and recover the medicine. By adding cold water, the temperature of the 80-100°C plastic fragments coming out of the cleaning boiler is reduced to about 20-40°C to improve the dehydration effect. If no hot water is added, plastic fragments at 80-100°C will easily stick to the inner wall of the first centrifugal dehydrator, thereby affecting the dehydration effect. A water outlet is provided under the first centrifugal dehydrator, and a water storage tank 26 is arranged under the water outlet for recovering the medicinal solution after washing in the first centrifugal dehydrator, so as to achieve the purpose of reusing the medicinal water.

Step 12: The step of removing light impurities in the plastic chips; the plastic chips after dehydration in step 11 may contain bottle cap chips, trademark paper chips or lighter sundry chips, etc. Light impurities are impurities with low density, whose density is lower than that of water, and they float on the water surface and become surface floats. The density of plastic debris is higher than that of water, and plastic debris is deposited on the bottom of the water. The light impurities in the plastic fragments are removed by hydraulic separation in the hydraulic separation tank. On the water surface, the floating matter is more effectively sent into the horizontal screw conveying rod by the water-removing mechanism to be cleaned up. The plastic fragments deposited at the bottom of the water are output to the next hydraulic separation tank or the second centrifugal dehydrator by the longitudinal screw conveying rod. In step 12, the removal of light impurities in plastic chips can be included once or twice or more, and the purpose of removing light impurities in plastic chips can be achieved multiple times by setting the number of hydraulic separation tanks until the cleanliness of plastic chips meets the requirements.

Step 13: Secondary dehydration and subpackaging of plastic fragments; the plastic fragments after one or more separations and cleanings in the hydraulic separation tank in step 11, after the cleanliness meets the preset requirements, are sent to the second centrifugal dehydrator for dehydration Packed after drying. After subpackaging, the plastic fragments are sent to the waiting area for inspection, and the plastic fragments that pass the inspection leave the factory.

In said step 4, the process of introducing high-temperature steam is included. In step 4, the screw conveyor feeds the incoming plastic bottles into the conveying pipeline before the delabeling machine, and high-temperature steam is introduced to soften the caps of the plastic bottles. In this way, the hard bottle cap can be avoided from colliding with the blade in the demarking machine, causing the bottle cap to be cut and fall off from the bottle body.

In the hot water washing step of the plastic fragments in step 102, alkaline water is added to the hot water.

Add caustic soda NaOH and high-efficiency cleaning agent to the cleaning boiler to achieve the purpose of cleaning, and can decolorize and decontaminate plastic fragments. The effect of caustic soda is to completely degrease the dirty bottles; if no caustic soda is added, the dirty bottles will turn yellow and affect the quality. The combination of the two can make the produced products white and translucent. The specific amount is increased or decreased by the staff according to the visual inspection and the baked product. If the raw material is dirty, it can be increased appropriately to ensure the quality of the product. High-efficiency cleaning agents are common liquid detergents or laundry detergents on the market.

A waste plastic bottle processing system with high cleanliness of the present invention, through plastic bottle input mechanism, washing mechanism, manual sorting table, delabeling machine, bottle label separator, multiple fans, block net, steel plate wall, shredder, Cold water sedimentation tank, cleaning boiler, centrifugal dehydrator, hydraulic separation tank and multiple screw conveyors and other equipment, after washing, sorting, delabeling, crushing, sedimentation, drying and other processes for plastic bottles, the plastic bottles are processed Into clean plastic sheets, packed into bags.

The waste plastic bottle processing system with high cleanliness of the present invention has the advantages of good demarking effect, high sorting efficiency, convenient and fast transport of plastic bottles on site, good drying effect of plastic bottle fragments, and high cleanliness.

It will be apparent to those skilled in the art that the invention is not limited to the details of the above-described exemplary embodiments, but that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Accordingly, the embodiments should be regarded in all points of view as exemplary and not restrictive, the scope of the invention being defined by the appended claims rather than the foregoing description, and it is therefore intended that the scope of the invention be defined by the appended claims rather than by the foregoing description. All changes within the meaning and range of equivalents of the elements are embraced in the present invention. Any reference sign in a claim should not be construed as limiting the claim concerned.

In addition, it should be understood that although this specification is described according to implementation modes, not each implementation mode only includes an independent technical solution, and this description in the specification is only for clarity, and those skilled in the art should take the specification as a whole , the technical solutions in the various embodiments can also be properly combined to form other implementations that can be understood by those skilled in the art.

Claims (9)

1. A waste plastic bottle treatment system with high cleanliness is characterized in that it comprises a plastic bottle input mechanism (1), a washing mechanism (3), a manual sorting table, a label removal machine (5), a bottle label separator ( 6), multiple fans (20), pulverizers (12), cold water sedimentation tanks (13), cleaning boilers (14), centrifugal dehydrators, hydraulic separation tanks and multiple screw conveyors (21); The sorting platform includes the first manual sorting platform (4), the second manual sorting platform (9) and the third manual sorting platform (11); the centrifugal dehydrator includes the first centrifugal dehydrator (15) and the second Two centrifugal dehydrators (18); The plastic bottle input mechanism (1) is connected with the washing mechanism (3) through a screw conveyor (21), and the outlet of the washing mechanism (3) is located at the first manual sorting table ( 4) above the input end of the conveyor belt; the first manual sorting platform (4) is connected with the demarking machine (5) through a screw conveyor (21) and the conveying pipeline, The labeling machine (5) is directly connected with the bottle label separator (6); the bottle label separator (6) and the upper part are provided with a horizontal wind blower for label paper blowing out, and the bottle label separator ( The lower part of 6) is provided with a fan (20) for blowing the plastic bottles falling in the bottle label separator (6) to the unloading cage (7); A first drop bottle opening (701) is provided under the side of the unloading cage (7) away from the bottle label separator (6); a first drop bottle opening (701) is provided below the first bottle drop mouth (701). A plastic bottle dropped from the bottle mouth (701) is sent to the screw conveyor (21) of the second manual sorting platform (9); The plastic bottle that the outlet end of the second artificial sorting table (9) is dropped is blown to the blower fan (20) of the air discharge bin (10) by the feeding cylinder (23), and the feeding cylinder outlet of the described feeding cylinder (23) ( 2301) inserted into the air unloading bin (10), the side wall of the unloading bin (10) away from the second manual sorting table (9) is a steel plate wall (1002), so A block (1001) is set between the steel plate wall (1002) and the outlet of the feeding cylinder (2301); A second bottle drop (1003) is provided below the position between the block (1001) and the outlet of the feeding cylinder (2301) of the air unloading bin (10), and a second bottle drop (1003) is placed below the second bottle drop (1003). A screw conveyor (21) is provided, and the screw conveyor (21) is used to transfer the plastic bottles dropped from the second bottle drop port (1003) to the third manual sorting table (11); The outlet end of the third manual sorting platform (11) is connected with the pulverizer (12), and the plastic bottle is sent into the pulverizer (12); the bottom of the pulverizer (12) is provided with a The final plastic bottle fragments are sent to the screw conveyor (21) of the cold water sedimentation tank; the cold water sedimentation tank (13) is connected with the cleaning boiler (14) by a screw conveyor (21) and delivery pipeline , sending the plastic bottle fragments deposited in the cold water sedimentation tank (13) into the cleaning boiler (14) for washing; Caustic soda is added to the hot water in the cleaning boiler (14); the cleaning boiler (14) is connected with the first centrifugal dehydrator (15) through a screw conveyor (21) and a delivery pipeline, and the second A centrifugal dehydrator (15) is provided with a cold water pipe (25) for adding cold water to the first centrifugal dehydrator (15); the dehydrated plastic fragments in the first centrifugal dehydrator (15) are blown by wind Send into the hydraulic separation tank, the hydraulic separation tank is connected with the second centrifugal dehydrator (18) through a screw conveyor (21) and the delivery pipeline and send the plastic fragments cleaned by the hydraulic separation tank into the second centrifuge Dehydrator (18); said second centrifugal dehydrator (18) sends the fragments after dehydration into fragment output pipe (24) by wind force, and the outlet of said fragment output pipe (24) is provided with for collecting and packaging said Bags for plastic fragments (19); The hydraulic separation tank includes a first hydraulic separation tank (16) and a second hydraulic separation tank (17); between the first hydraulic separation tank (16) and the second hydraulic separation tank (17), a spiral Type conveyor (21) is connected with conveying pipeline. 2. The waste plastic bottle processing system with high cleanliness according to claim 1, characterized in that, the plastic bottle input mechanism (1) is a conveyor belt or a roller conveyor, and the plastic bottle input mechanism (1) A roll-type unpacking machine (2) is arranged between the washing mechanism (3). 3. The waste plastic bottle processing system with high cleanliness according to claim 1, characterized in that, protective fences (101) are arranged on both sides of the plastic bottle input mechanism (1). 4. The waste plastic bottle processing system with high cleanliness according to claim 1, characterized in that, the cleaning boiler (14) is provided with a mixer (27). 5. The waste plastic bottle treatment system with high cleanliness according to claim 1, characterized in that, the hydraulic separation pool includes a pool body (28) filled with clear water, and the top of the pool body (28) is close to debris One end of the inlet is provided with a stirrer (27), and a horizontal screw conveying rod (29) is provided on the outside of the end of the pool body (28) away from the debris inlet; the bottom of the pool body (28) is provided with a The lengthwise direction of the pool body (28) extends and transports the longitudinal screw conveyor rod (30); on the pool body (28), there are multiple A water diverting mechanism (31). 6. The waste plastic bottle treatment system with high cleanliness according to claim 1, further comprising a plastic bottle remote transmission mechanism; the plastic bottle remote transmission mechanism includes a plurality of transmission units, and each transmission unit includes a The typhoon (20) is connected to the transmission pipeline (22), and the transmission pipelines (22) of the front and rear adjacent transmission units are connected. 7. A plastic bottle processing method of a waste plastic bottle processing system with high cleanliness according to claim 1, characterized in that, comprising the steps of: Step 1: plastic bottle input step; Step 2: Plastic bottle hot water washing step; Step 3: First sorting step: Step 4: Plastic bottle delabeling and sorting step; Step 5: a heavy impurity removal step; Step 6: the second manual sorting step; Step 7: a small impurity removal step; Step 8: the third manual sorting step; Step 9: plastic bottle crushing step; Step 10: a step of washing plastic fragments, including a step 101 of washing plastic fragments in cold water and a step 102 of washing plastic fragments in hot water; Step 101: the step of washing plastic fragments in cold water; Step 102: the step of washing plastic fragments in hot water; Step 11: a dehydration step of the plastic fragments; Step 12: the step of removing light impurities in the plastic fragments; Step 13: Secondary dehydration and subpackaging of plastic chips. 8. A kind of plastic bottle processing method according to claim 7, is characterized in that, in said step 4, comprises the process of feeding high-temperature steam. 9. A method for treating plastic bottles according to claim 7, characterized in that, in the step of washing plastic fragments with hot water in step 102, alkaline water is added to the hot water.