Pneumatic sorting machine and sorting method for plastic sheets and labels

Abstract

The invention discloses a pneumatic sorting machine and a sorting method for plastic sheets and labels, which are used for separating labels, light impurities such as films, paper, cloth, fibers, sponges and the like and dust in the plastic sheets, and solve the problems of low working efficiency and poor winnowing effect of the existing similar equipment on the market. The feeding disc is in a rectangular box shape, a first feeding port is formed in one side of the top wall of the feeding disc, a first discharging port is formed in one side of the side wall of the feeding disc, and the first discharging port is inserted into the separator; a first feeding hole of the feeding disc is communicated with the bottom of the stock bin; a triangular pyramid-shaped material dispersing plate is mounted at a first feeding hole of the feeding disc; a separator is mounted on one side of the main platform; the separator comprises a separation pipe, the separation pipe is in a rectangular pipe shape, and one side wall of the separation pipe is communicated with a chute pipe; the chute pipe comprises a first inclined plate and a second inclined plate which are inclined up and down; a plurality of first air holes are formed in the first inclined plate; and a centrifugal fan is mounted at the top of the separation pipe and is communicated with the cyclone dust collector through a pipeline.

Description

Technical Field

[0001] The invention belongs to the technical field of plastic recycling, and in particular relates to a plastic sheet and label wind power sorting machine and a sorting method. Background Art

[0002] Plastic sorting machine, also called silicone rubber sorting machine, plastic impurity remover, etc. It is a special equipment suitable for the field of plastic recycling. Its main function is to remove impurities from waste plastic fragments, such as rubber, silicone, wood chips, small particles, etc., replacing traditional sorting methods such as manual sorting, making impurity removal in plastic recycling easier and more convenient.

[0003] There are similar devices on the market, such as a recycled plastic fragment label separation device with application number 201920316906.2, which directly puts plastic fragments and label paper into the separation box through a hopper, and uses a blower connected to the air inlet pipe to blow out the air to separate the two; however, there are problems such as overlapping when plastic fragments and label paper are directly put in, poor separation effect, poor air selection effect, and low work efficiency. Summary of the invention

[0004] In view of the shortcomings of the above background technology, the purpose of the present invention is to provide a plastic sheet and label wind sorting machine and sorting method, which is used to separate labels in plastic sheets, and also light impurities such as films, paper, cloth, fiber, sponge and dust, which solves the problems of low working efficiency and poor wind sorting effect of similar equipment currently on the market.

[0005] To solve the above technical problems, the purpose of the present invention is achieved as follows: A pneumatic separator for plastic sheets and labels, comprising a main platform, a vibrator mounted on the main platform, a feeding tray mounted on the vibrator to drive vibration; the feeding tray is in a rectangular box shape, a first feeding port is provided on one side of the top wall of the feeding tray, a first discharging port is provided on one side of the side wall of the feeding tray, and the first discharging port is inserted into a separator; The first feed inlet of the feeding tray is connected to the bottom of the silo; a triangular pyramid-shaped bulk material plate is installed at the first feed inlet of the feeding tray; A separator is installed on one side of the main platform; the separator includes a separator tube, which is in a rectangular tube shape, and a chute tube is connected to one side wall of the separator tube; the chute tube includes two upper and lower inclined first slanted plates and a second slanted plate; a plurality of first air holes are opened on the first slanted plate; A centrifugal fan is installed on the top of the separation tube, and the centrifugal fan is connected with the shaken dragon through a pipeline; a discharge valve is installed at the bottom of the shaken dragon, and a space bag is placed under the shaken dragon; and a cloth bag is connected to the top of the shaken dragon through a pipeline.

[0006] On the basis of the above scheme and as a preferred scheme of the above scheme: the main platform is welded by square tubes or round tubes.

[0007] On the basis of the above scheme and as a preferred scheme of the above scheme: the first inclined plate is inclined from top to bottom away from the second inclined plate.

[0008] On the basis of the above scheme and as a preferred scheme of the above scheme: the front and rear side walls of the top of the separation tube are gathered inward from bottom to top, and the left and right side walls of the top of the separation tube are expanded outward from bottom to top and spliced ​​to form a cone tube.

[0009] On the basis of the above scheme and as a preferred scheme of the above scheme: an observation port is opened on the other side wall of the separation tube, a transparent plate is installed on the observation port, and the observation port is arranged opposite to the first air hole on the first inclined plate.

[0010] On the basis of the above scheme and as a preferred scheme of the above scheme: the left and right plates at the bottom of the separation tube are bent outward to form a 7-shaped first baffle, and a plurality of second air holes are opened on the first baffle.

[0011] On the basis of the above scheme and as the preferred scheme of the above scheme: a number of silos, feeding units and separators are connected one by one; a number of separators are merged into the Shaklong through pipelines; and the space bag is set on the slag discharge trolley for transportation.

[0012] A method for sorting plastic sheets and labels by a wind-powered sorting machine, using the plastic sheets and labels wind-powered sorting machine, comprises the following steps: S1, the raw materials of the crushed plastic flakes and labels are transported into the silo through the pipeline; the raw materials in the silo are transported to the feeding unit under the action of gravity; S2, a feeding tray and a vibrator are combined into a feeding unit; the vibrator is installed on the bottom surface of the feeding tray, and the top of the feeding tray is connected to the bottom of the silo; S3, the raw materials are evenly fed into the separator through the feeding tray. A centrifugal fan is installed on the top of the separator to suck the raw materials into the separator through the pipeline, and the plastic sheets fall down into the discharge hopper; S4, a discharge valve is installed at the bottom of the Shaklon, the label falls into the space bag, and the dust falls upward into the cloth bag.

[0013] Compared with the prior art, the present invention has the following outstanding and beneficial technical effects: The innovations and advantages of the plastic sheet and label wind-powered sorting machine and sorting method of the present invention are as follows: The raw material is a mixture of plastic sheets and light impurities such as a small amount of labels. It is put into the silo through an external device pipeline. The raw materials in the silo are transported to multiple feeding units in parallel under the action of gravity. Each feeding unit consists of a feeding tray and a vibrator. The vibrator drives the feeding tray to vibrate so that the raw materials can be separated and evenly fed into the chute pipe. When the raw materials fall along the slope in the chute pipe, they will gradually disperse due to the principle of gravity acceleration, making it easier to distinguish the labels from the materials.

[0014] The equipment includes multiple sets of identical separation chambers, with several first air holes opened on the first inclined plate of the chute tube, and second air holes on both sides of the bottom of the separation tube. Each separation chamber is equipped with an independent and adjustable centrifugal fan. The centrifugal fan is turned on and adjusted to a reasonable air volume. When the falling raw materials pass through the chute tube, most of the light impurities such as labels will be blown up by the oblique upward airflow coming in from the air holes at the bottom, while the plastic sheets will only be slightly blown up due to their high specific gravity, and then fall down immediately, so as to achieve the precise separation of light impurities such as labels, and complete the first air selection; when the raw materials fall into the separation tube, a small part of the light impurities such as labels that have not been separated will be blown up by the upward airflow coming in from the second air hole at the bottom, completing the second air selection. Under the action of the centrifugal fan, the two airflows merge to send light impurities such as labels into the shackle, and collect them after falling; fine dust is sent to the bag for collection from the airflow outlet of the shackle, and cleaned regularly to prevent dust pollution in the environment.

[0015] The separation chamber of the innovative separator is composed of an inclined slot pipe with a first air hole, a straight air duct with a second air hole, and a centrifugal fan. The size of the first air hole and the second air hole can be designed according to the needs to achieve the purpose of uniform air intake at the bottom.

[0016] Taking advantage of the different aerodynamic characteristics (drift coefficients) between plastic sheets and light impurities such as labels, the negative pressure air flow generated by the centrifugal fan is used to separate light impurities such as labels from the plastic sheets. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall front side structure of the present invention.

[0018] Figure 2 It is a schematic diagram of the overall left side structure of the present invention.

[0019] Figure 3 It is a schematic diagram of the overall right side structure of the present invention.

[0020] Figure 4 It is a schematic diagram of the sorting process of the present invention.

[0021] Figure 5 It is a schematic diagram of the structure of a feeding tray of the present invention.

[0022] Figure 6 It is a schematic diagram of the side sectional structure of the feeding tray of the present invention.

[0023] Figure 7 It is a front structural schematic diagram of the separator of the present invention.

[0024] Figure 8 It is a schematic diagram of the rear structure of the separator of the present invention.

[0025] Fig. 9It is a schematic diagram of the side structure of the separator of the present invention.

[0026] Figure markings: plastic sheet 100; label 200; silo 01; feeding tray 02; first feed port 020; first discharge port 021; bulk plate 022; vibrator 03; separator 04; separation tube 040; chute tube 041; first inclined plate 0410; first air hole 04100; second inclined plate 0411; conical tube 042; transparent plate 043; first baffle 044; second air hole 0440; centrifugal fan 05; shaker 06; discharge hopper 07; high-pressure fan 08; discharge valve 09; space bag 10; slag discharge trolley 101; cloth bag 11; main platform 12. DETAILED DESCRIPTION

[0027] The present invention will be further described below with reference to specific embodiments in conjunction with the accompanying drawings; This embodiment provides a plastic sheet and label wind power sorting machine, including a main platform 12, a vibrator 03 installed on the main platform 12, and a feeding tray 02 installed on the vibrator 03 to drive vibration; the main platform 12 is used to raise the equipment to achieve the required height of installation and use; the vibrator 03 is an existing structure; The feeding tray 02 is in a rectangular box shape, a first feed port 020 is provided on one side of the top wall of the feeding tray 02 , a first discharge port 021 is provided on one side of the side wall of the feeding tray 02 , and the first discharge port 021 is inserted into the separator 04 .

[0028] As described above, the feeding tray 02 is assembled with metal plates, and bolts pass through the vibrator 03 to connect and fix the feeding tray 02 .

[0029] The first feed port 020 on the feed tray 02 is connected to the bottom of the silo 01 through a hose, so as to achieve the effect of forward separation of the raw materials by vibration; A triangular pyramid-shaped bulk material plate 022 is installed at the first feed inlet 020 of the feeding tray 02.

[0030] As described above, the bulk plate 022 is formed by welding metal plates, and the cross-section of the bulk plate 022 is triangular, showing a top-low-large effect and tilted from top to bottom, which can disperse the mixed raw materials to achieve a uniform effect.

[0031] A separator 04 is installed on one side of the main platform 12; the separator 04 includes a separator tube 040, which is in a rectangular tube shape, and a chute tube 041 is connected to one side wall of the separator tube 040; the chute tube 041 is used to increase the path for the mixed raw materials to enter the separator tube 040, so that the plastic sheet 100 and the label 200 have a longer time for transportation and separation; The inclined groove pipe 041 includes two upper and lower inclined first inclined plates 0410 and second inclined plates 0411; a plurality of first air holes 04100 are provided on the first inclined plate 0410; the first air holes 04100 are used for gas inhalation to form airflow; Preferably, the plurality of first air holes 04100 are arranged in a vertical and horizontal array or in an up-and-down staggered arrangement. The size of the first air holes 04100 is designed according to the requirements and in accordance with the specifications of the plastic sheet 100 and the label 200; A centrifugal fan 05 is installed on the top of the separation tube 040, and the centrifugal fan is connected to the Shakron through a pipeline; The centrifugal fan model is C6-48-3.15A, with a power of 2.2KW, an air volume of 2951m³ / h, a total pressure of 1086Pa, a speed of 2840rpm, and an operating frequency of 31±3HZ; As described above, the centrifugal fan 05 above the separator 04 is turned on, and the first air hole 04100 on the first inclined plate 0410 of the inclined slot tube 041 forms an upward negative pressure airflow to blow away the plastic sheet 100 and the label 200; A discharge valve 09 is installed at the bottom of the shaker, and a space bag 10 is placed below the shaker; a cloth bag 11 is connected to the top of the shaker through a pipeline.

[0032] The working principle of the cyclone dust collector is to use the centrifugal force generated by the rotating airflow to separate particles from the airflow containing particles, and the internal airflow forms an outer vortex and an inner vortex. The formation of the rotating airflow: the particle-containing air enters the air inlet at the upper part of the outer cylinder at a high speed, and then rotates in a spiral shape from top to bottom between the inner and outer cylinders and the cone.

[0033] During the strong rotation, the label is thrown toward the wall due to the large centrifugal force, collides and rubs, and gradually loses its inertia. Under the action of its own gravity, it falls along the cylinder wall to the cone part. When the airflow approaches the lower end of the cone, the discharge valve is installed at the outlet, and the air cannot flow out from the bottom. It begins to reverse and rise, and then is discharged into the cloth bag through the inner cylinder.

[0034] As mentioned above, during the falling process of the raw materials, they will gradually disperse due to the principle of gravity acceleration, which is conducive to distinguishing the label 200 from the raw materials. The gravity of the two is different; the centrifugal fan 05 generates an upward airflow, and the label 200 floats upward with the airflow, and is sucked out of the separator 04 by the centrifugal fan 05 and blown into the Shakron 06; The tag 200 is put into the space bag 10 for recycling, and at the same time, the fine dust is blown into the bag 11 for collection; As described above, by utilizing the different aerodynamic characteristics (drift coefficients) of the crushed plastic flakes 100 and the labels 200 mixed therein, the negative pressure air flow generated by the fan is used to separate the light impurities such as the labels 200 in the PET bottle flakes.

[0035] Furthermore, the main platform 12 is formed by welding square tubes or round tubes.

[0036] As mentioned above, metal square tubes or round tubes are used, which have a stable structure and a long service life; Furthermore, the first inclined plate 0410 is inclined from top to bottom away from the second inclined plate 0411 .

[0037] As described above, increasing the length of the first inclined plate 0410 and increasing the number of the first air holes 04100 can make the plastic sheet 100 and the label 200 thrown up by the airflow more effectively; Preferably, the angle A between the first inclined plate 0410 and the separation tube 040 is 120-160 degrees; when the angle is less than 120 degrees, the length of the first inclined plate 0410 becomes shorter, and the separation effect is poor; when the angle is greater than 160 degrees, the inlet of the chute tube 041 becomes narrower, and the raw material input is too concentrated; Furthermore, the front and rear side walls of the top of the separation tube 040 are gathered inward from bottom to top, and the left and right side walls of the top of the separation tube 040 are expanded outward from bottom to top to be assembled to form a cone tube 042 .

[0038] As described above, the left and right side walls of the conical tube 042 expand outward to form side walls that are larger at the top and smaller at the bottom, so that the tags 200 can pass through quickly. The front and rear side walls of the conical tube 042 converge inward to form side walls that are smaller at the top and larger at the bottom, so that the tags 200 can converge.

[0039] Furthermore, an observation port is provided on the other side wall of the separation tube 040 , and a transparent plate 043 is installed on the observation port. The observation port is arranged opposite to the first air hole on the first inclined plate of the inclined groove tube 041 .

[0040] As described above, the operator can observe the input and separation of raw materials through the transparent plate 043, and check whether the plastic sheet 100 and the label 200 are separated at the first air hole 04100, so as to avoid material shortage and accumulation and make timely adjustments, which is more practical.

[0041] Furthermore, the two left and right plates at the bottom of the separation tube 040 are bent outward to form a 7-shaped first baffle 044 , and a plurality of second air holes 0440 are formed on the first baffle 044 .

[0042] As described above, the second air holes 0440 form a continuous second air separation effect, and the separation and air separation effect of the plastic sheet 100 and the label 200 is more complete, avoiding omissions.

[0043] Preferably, the plurality of second air holes 0440 are arranged in a vertical and horizontal array, and the size of the second air holes 0440 is designed as required; Furthermore, several silos 01, feeding units and separators 04 are connected one by one; several separators 04 are connected to the Shakeron 06 through pipelines; the wind speed and pressure are adjusted by independently adjusting the frequency of each centrifugal fan 05, so that the chambers of multiple separators connected in parallel can produce the same separation effect. The PET bottle flakes in the chambers of multiple separators 04 are brought together, and the separation effect is higher; 10 sets of space bags are placed on the slag discharge trolley 101 for transportation.

[0044] As mentioned above, using the slag discharge trolley 101 to transfer the space bag 10 reduces the labor intensity. The collection of dust by the cloth bag 11 keeps the on-site environment clean, which also reflects the environmental protection requirements.

[0045] This embodiment provides a method for separating plastic sheets and labels using a wind-powered separator, comprising the following steps: S1, the raw materials of the mixed plastic sheets 100 and the labels 200 after being crushed are input into the silo 01 through the pipeline; the raw materials in the silo 01 are transported to the feeding unit under the action of gravity; The raw materials are light impurities such as labels 200, and the plastic sheets 100 are broken PET bottle sheets, but not limited to this kind, containing about 1% of labels 200, which are put into the silo 01 through the fan equipment; spiral dragon feeding, blowing feeding or negative pressure feeding can be adopted, and blowing feeding is the most stable and convenient.

[0046] S2, the feeding tray 02 and the vibrator 03 are combined into a feeding unit; the vibrator 03 is installed on the bottom surface of the feeding tray 02, and the top of the feeding tray 02 is connected to the bottom of the silo 01; The raw materials in the silo 01 are transported to the feeding unit under the action of gravity; the vibrator 03 drives the feeding tray 02 to vibrate, so that the raw materials mixed with the plastic sheets 100 and the labels 200 vibrate to avoid the two stacking on each other and achieve a uniform dispersion effect; S3, the raw materials are uniformly fed into the separator 04 through the feeding tray 02, and a centrifugal fan 05 is installed on the top of the separator 04 to suck the raw materials into the slurry 06 through the pipeline, and the plastic sheets 100 fall down into the discharge hopper 07, and the high-pressure fan 08 blows the plastic sheets 100 out; in addition to the high-pressure fan, a spiral dragon can also be used for discharging; During the falling process of the raw materials, they will gradually disperse due to the principle of gravity acceleration, which is conducive to distinguishing the label 200 from the raw materials. The two have different gravity. The centrifugal fan 05 generates an upward airflow, and the label 200 floats upward with the airflow, and is sucked out of the separator 04 by the centrifugal fan 05 and blown into the Shakeron 06. S4, a discharge valve 09 is installed at the bottom of the Shaklong 06, the label 200 falls into the space bag 10, and the dust falls upward into the cloth bag 11.

[0047] The tag 200 is put into the space bag 10 for recycling, and at the same time, the fine dust is blown into the bag 11 for collection; As described above, by utilizing the different aerodynamic characteristics (drift coefficients) of the crushed plastic flakes 100 and the labels 200 mixed therein, the negative pressure air flow generated by the fan is used to separate the light impurities such as the labels 200 in the PET bottle flakes.

[0048] Large production capacity (single channel 1T / H), low plastic flakes 100 (PET bottle flakes) loss rate (≤0.5%), test data shows that the separation efficiency of bottle flakes containing labels 200≤1% is ≥99%, and the moisture content of the raw materials is required to be ≤3%.

[0049] Test experiment: 1. Test raw materials

[0050] 2. Testing process ①Run continuously for 5 minutes without load, troubleshoot and ensure the equipment is in normal operation; ② Based on the wind speed of each channel of 2.7±0.3m / s, adjust the frequency of the centrifugal fan, balance the four channels, and the optimal frequency is 33±3HZ (power supply 50HZ); ③ The equipment requires 3T / H, and the output vibrator voltage is adjusted to 155±5V. That is, 750kg / H for each channel; ④Test material preparation: 280kg cold water bottle flakes, 2.55kg labels. Mix according to the required proportion; ⑤Test sequence: discharge valve open → centrifugal fan open → air supply fan open → bottle flakes and labels mixed feeding → air supply fan closed → vibrator open → bottle flakes collection, label collection → vibrator closed → centrifugal fan closed → discharge valve closed; ⑥Weigh and record the labels and bottle pieces separately, and take samples for analysis.

[0051] 3. Test Data

[0052] Bottle flakes mis-carrying rate = (sucked-out bottle flakes / total bottle flakes input) * 100%.

[0053] In the description of the present invention, it should be understood that the terms "upper", "lower", "top", "bottom", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art. 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 orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0054] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. In the present invention, unless otherwise clearly specified and limited, the terms "install", "set", "connect", "fix", "screw" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; The above embodiments are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A wind-powered sorting machine for plastic sheets and labels, characterized in that: It includes a main platform, a vibrator is installed on the main platform, and a feeding tray is installed on the vibrator to drive vibration; the feeding tray is in a rectangular box shape, a first feeding port is opened on one side of the top wall of the feeding tray, a first discharging port is opened on one side of the side wall of the feeding tray, and the first discharging port is inserted into the separator; The first feed inlet of the feeding tray is connected to the bottom of the silo; a triangular pyramid-shaped bulk material plate is installed at the first feed inlet of the feeding tray; The separator includes a separation tube, which is in a rectangular tube shape. A side wall of the separation tube is connected with an inclined slot tube. The inclined slot tube includes two upper and lower inclined first inclined plates and a second inclined plate. The first inclined plate is provided with a plurality of first air holes. A centrifugal fan is installed on the top of the separation tube, and the centrifugal fan is connected with the shaken dragon through a pipeline; a discharge valve is installed at the bottom of the shaken dragon, and a space bag is placed under the shaken dragon; and a cloth bag is connected to the top of the shaken dragon through a pipeline.

2. The plastic sheet and label wind power sorting machine according to claim 1, characterized in that: The main platform is welded from square tubes or round tubes.

3. The plastic sheet and label wind separator according to claim 2, characterized in that: The first inclined plate is arranged to be inclined from top to bottom away from the second inclined plate.

4. The plastic sheet and label wind separator according to claim 3, characterized in that: The front and rear side walls of the top of the separation tube are gathered inward from bottom to top, and the left and right side walls of the top of the separation tube are expanded outward from bottom to top to be assembled to form a cone tube.

5. The plastic sheet and label wind power sorting machine according to claim 4, characterized in that: An observation port is provided on the other side wall of the separation tube, and a transparent plate is installed on the observation port. The observation port is arranged opposite to the first air hole on the first inclined plate.

6. The wind-powered separator for plastic sheets and labels according to claim 5, characterized in that: The left and right plates at the bottom of the separation tube are bent outward to form a 7-shaped first baffle, and a plurality of second air holes are formed on the first baffle.

7. The plastic sheet and label wind power sorting machine according to claim 1, characterized in that: Several silos, feeding units and separators are connected one by one; several separators are connected to the Shakron through pipelines; The space bag set is installed on the slag discharge trolley for transportation.

8. A method for separating plastic sheets and labels by a wind-powered separator, using the plastic sheets and labels wind-powered separator according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1, the raw materials of the crushed plastic flakes and labels are transported into the silo through the pipeline; the raw materials in the silo are transported to the feeding unit under the action of gravity; S2, a feeding tray and a vibrator are combined into a feeding unit; the vibrator is installed on the bottom surface of the feeding tray, and the top of the feeding tray is connected to the bottom of the silo; S3, the raw materials are evenly fed into the separator through the feeding tray. A centrifugal fan is installed on the top of the separator to suck the raw materials into the separator through the pipeline, and the plastic sheets fall down into the discharge hopper; S4, a discharge valve is installed at the bottom of the Shaklon, the label falls into the space bag, and the dust falls upward into the cloth bag.

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