KR101060589B1 - Apparatus for realtime separating component and color of wasted plastic using optical multiplexer - Google Patents

Abstract

PURPOSE: A system for sorting ingredients and colors of waste plastic in real time by using an optical splitter is provided to improve the sorting ability of the color and ingredient by multiplying the collection efficiency of the light source using a plurality of reflecting mirrors through an optical splitter. CONSTITUTION: A system for sorting ingredients and colors of waste plastic in real time by using an optical splitter comprises a conveyor(1), a plurality of light sources(2), a plurality of probes(3), an optical splitter, a NIR(near infrared ray) spectrometer(6), a RGB sensor, and an analysis and control unit(7). The conveyor transfers the waste plastic which has a various colors and ingredients. The light source irradiates rays in the upper part of the conveyor. The probe detects the incident ray reflected from the surface of the waste plastic. The optical splitter divides the light ray which is from probes into the near infrared ray and visible ray. The analysis and control unit determines the ingredient and color of the plastic which analyzes the electronic signal and color signal and assorted.

Description

Apparatus for realtime separating component and color of wasted plastic using optical multiplexer}

The present invention relates to a component and color sorting device of real-time waste plastic using a light splitting device. Specifically, the light source incident from the probe is separated into near-infrared and visible light using a light splitting device to separate the color and color of the plastic to be sorted. It relates to a device for sorting.

Representative waste plastics used as recycled materials include PET, PE, PP, PS, ABS and PVC.

Recently, the waste plastics are used to select components except for PVC components for use as RDF (Refused Drived Fuel) or RPF (Refuse Plastic Fuel), or only the PET components are recycled to chemical yarn using waste plastics. Hazardous infrared spectroscopy uses near-infrared spectroscopy to select waste plastics.

The exclusion of PVC in the manufacture of RDF or RPF is because PVC contains chlorine among the elements that make up polymers, so RDF or RPF containing PVC generates chlorine gas, which is a toxic gas during combustion. Because it has. Therefore, the process of sorting PVC in the manufacture of RDF or RPF by sorting waste or waste plastic is very important. For this purpose, a process of sorting PVC using near infrared spectroscopy has been used recently. For reference, near infrared rays are infrared rays outside the end of the red spectrum when the light emitted from the sunlight or the heating element is scattered into the spectrum, and the shortest wavelength is 0.75 ~ 3㎛, which is called near infrared rays. Infrared rays are generally used for industrial or medical purposes because they have a stronger thermal effect than visible or ultraviolet rays. These near-infrared rays, including electron spectra, exhibit not only thermal action but also photographic action, photoelectric action, and fluorescence action. Therefore, the detector has a photo board, a photovoltaic cell, a photocouple, a thermocouple, and a phosphor. Back is used. The photo plate and the phototube can detect only a wavelength of 1.2 mu m.

In addition, the reason for selecting only the PET component for recycling as a chemical yarn is that only such a PET component is suitable to use as a yarn. To this end, only the PET component may be selected by using a near-infrared spectroscopy method used for screening by excluding PVC when manufacturing RDF or RPF as described above. However, PET, which is selected for yarn production, is not sorted by color, so it can be used as a yarn only after color selection by hand. The reason is that if the plastics of different colors are not selected by the same color but melted by heat together, the mixed color may change to black, and thus, yarns of various colors cannot be produced.

As shown in the above-described embodiment of the recycling of waste plastics, as the sorting method according to various plastic components, the near-infrared spectroscopy is widely used, but one disadvantage is that when the waste plastics sorted by component are sorted again by color, There is no sorting method, so it sorts by hand. Therefore, the need for an automated color sorting process is emerging.

Hereinafter, a conventional screening method using the near infrared spectroscopy will be described.

6 is a conceptual diagram showing the component selection by the conventional near-infrared spectroscopy method, as shown in the conventional component selection method is the type of plastic through the absorption spectrum analysis of the near-infrared data reflected directly through the near infrared rays to the plastic being transported through the conveyor How to find out.

Specifically, a near-infrared irradiation light source is installed at the end of the conveyor such that near-infrared light is irradiated to the end of the conveyor for transporting the waste plastic recycled product, and a probe for detecting the reflected near-infrared light is installed at the top.

In addition, an optical splitter having a plurality of input terminals which are connected to the optical fiber connected by each probe to divide the near infrared rays detected by the plurality of probes into light for each wavelength is installed, and the light splitter This is an analytical control unit that operates the air ejector when the absorption amount value corresponding to the plastic component to be selected is detected by comparing the absorption amount value of the NIR spectrometer made with the spectroscopic spectrum band with the absorption spectra of the spectra spectrum generated from the NIR spectrometer. It is composed. In the drawing, the encoder encoder is a device for controlling the speed of the drive motor of the conveyor, although the circuit connection line is omitted for convenience, and the air pressure sensor is a sensor for measuring the amount of compressed air supplied to the air discharger, although the circuit connection line for the convenience is omitted.

In addition, although the drawings seen from the side direction of the conveyor for convenience of illustration, the light source, the probe, and the air ejector are configured in plural to process the near infrared rays detected in each area.

However, the conventional optical splitter used in the component analysis using the near-infrared spectroscopy is a device that recognizes only 32 probes in total, but can be used to analyze the component using the near-infrared light. It is a structure that can't select color.

Therefore, in order to select a color, an optical screening device capable of screening a separate color should be provided. In this case, there is a structural problem that the device configuration becomes complicated. That is, there is a disadvantage that a light source for color selection and an additional probe for detecting color from the light source are required, which complicates the device configuration.

However, even more problematic than this, even if an additional device for color screening is installed, the device cannot be installed in the same position, and there is a problem that an error may occur in the area error and the air ejector screening time during the screening.

The reason for this is that the direction of the conveyor divides the width direction of the conveyor into a plurality of areas, and if a plastic component to be sorted is detected according to the near-infrared and visible light information input from the probe by positioning one probe for each area. Since the high-pressure air is discharged from the air ejector located in the lower part of the probe, it is configured to sort out the falling plastics. This is because it is difficult to proactively cope with an increase in the amount of processing information by separately processing and matching near-infrared and visible light, thereby making it difficult to construct various products.

The detailed configuration or principle of the light source and the probe used in the component analysis of the plastic using the near-infrared spectroscopy is a well-known technique used in the near-infrared spectroscopy, and thus a detailed description thereof will be omitted.

Hereinafter, the conventional optical distribution device will be described in more detail.

7 is a conceptual diagram showing an optical splitter used in the near-infrared spectroscopy. As shown, when the light source (halogen lamp) irradiates the waste plastic being transported through the conveyor, the reflected visible light and the near-infrared light are connected through 32 optical fibers connected to 32 probes. Incident on the optical splitter including the optical fiber fastening portions, which are the two light incident portions. Specifically, a total of 32 optical fibers are fastened at the optical fiber fastening part, and when the light source is introduced into the optical fiber fastened in this way, the near-infrared light is reflected by the fixed mirror by reflecting the light sources (visible light and near-infrared rays) which are drawn from the 32 optical fibers in the rotating mirror. The near-infrared collection lens is focused again and collected and transmitted to the NIR spectrometer to generate a spectral spectrum. The motor is configured to rotate the rotating mirror to sequentially send light sources drawn in a total of 32 optical fibers to the fixed mirror in sequence.

However, the conventional optical distribution device configured as described above has a problem in that the light source is not properly collected using only one reflector for component analysis using near infrared rays, and thus the light source is not properly collected.

In addition, the existing near-infrared detection device has a disadvantage that can select only up to four plastic components due to the device that recognizes a total of 32 probes,

The most important problem is that the conventional optical distribution device has a structural problem that color discrimination is not possible. Therefore, only the components of each plastic can be selected by the near-infrared spectroscopy using the near-infrared rays, and the device is used to select colors by processing separate visible light. It can be seen that color selection is not possible unless is provided.

SUMMARY OF THE INVENTION An object of the present invention for solving the above problems is to provide a waste plastic sorting device that allows color sorting at the same time when sorting waste plastic by near-infrared spectroscopy.

Another object of the present invention is to allow simultaneous color sorting when sorting waste plastic by near-infrared spectroscopy, but one light distribution device capable of collecting near-infrared and visible light for sorting components and colors in a sorting process through one conveyor. To provide a waste plastic sorting device for use.

Another object of the present invention is to sort waste plastics by material through a single conveyor so as to simultaneously sort colors when sorting waste plastic by near-infrared spectroscopy, and then analyze the waste plastics classified and analyzed by the components on another conveyor. Secondary screening is performed by color.In this case, using the same device for screening components and colors, only near-infrared light is used for screening plastic components of near-infrared and visible light. The present invention provides a waste plastic sorting device that uses only visible light for color sorting of plastics.

Another object of the present invention is to provide a waste plastic sorting device in which the light splitting device used in the near-infrared spectroscopy increases the collection efficiency of the light source by using a plurality of reflecting mirrors, thereby enhancing the sorting ability at the time of component selection and color selection.

Another object of the present invention is to provide a waste plastics sorting device capable of analyzing each component at the same time by configuring the light splitting device used in the near infrared spectroscopy to receive the incident signals from 64 probes.

The present invention to achieve the object as described above and to perform the problem for eliminating the conventional defects and a first conveyor for transporting waste plastics having a variety of components and colors; A second conveyor for transporting waste plastics having various colors of specific components selected from the first conveyor; A plurality of light sources installed on the first and second conveyors to irradiate light rays; A light distribution device that separates a plurality of probes installed on the first and second conveyors and the light rays incident from the probes so that the light rays emitted from the light source reflect the surface of the waste plastic and detect incident light rays; In the real-time waste plastic component and color sorting apparatus using a light distribution device, including; an air ejector installed in the lower portion of the first conveyor and the second conveyor for discharging waste plastic,
In order to separate light rays incident from multiple probes into near-infrared and visible light, the optical fiber connection part to which optical fibers connected to 64 probes are fastened, and the light rays simultaneously input from 64 optical fibers through the optical fiber connection part are sequentially sent to the fixed mirror. A rotating mirror connected to a motor having a rotational speed of up to 70 Hz per second, a fixed mirror for emitting incident light to a dichroic mirror, a light source collecting lens for collecting light reflected from the fixed mirror, a light source A dichroic mirror that separates the collected light into near-infrared and visible light with the collecting lens, and a near-infrared collecting lens and dichroic mirror that captures and focuses near-infrared light passing through the dichroic mirror, and exits it with an NIR spectrometer. The dichroic mirror is installed to capture and focus the visible light reflected by the light, and to emit it with the RGB sensor. The optical distributor configured to clearance in the front end include a visible light collecting lenses provided in the branched cylinder branch pipe and;
A NIR spectrometer for converting near-infrared rays of the plastic on the first conveyor from the light distribution device into absorption spectrum electronic signal values;
An RGB sensor for converting visible light on the second conveyor from the light distribution device into a color signal;
Analyze the electronic and color signals input from the NIR spectrometer and RGB sensor, and compare them with pre-stored databases to determine whether they are plastic components and colors to be sorted. It is achieved by providing a component and color sorting device of the real-time waste plastic using an optical distribution device, characterized in that consisting of; an analysis control unit for operating an air ejector responsible for the.

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As described above, the present invention is capable of color selection at the same time when the waste plastics are screened by near infrared spectroscopy, and color separation is possible in one system without a separate additional device for color selection.

In addition, when the waste plastics are screened by near infrared spectroscopy as described above, in the sorting process through one conveyor, the collection of near-infrared and visible light for screening of components and colors is possible by one light distribution device.

In addition, if necessary, one conveyor can sort by component by primary component analysis, and waste plastics classified and analyzed by primary component can be sorted by color on another conveyor by secondary, where near-infrared and visible light By using the same light distribution device that can be distributed simultaneously, the primary uses only near-infrared information and the secondary uses only visible light information for color information, so that one device can be used differently for two purposes without a separate device. With advantages,

In addition, the optical distribution device used in the near-infrared spectroscopy improves the collection efficiency of the light source by using a plurality of reflectors to increase the screening ability at component selection and color selection.

In addition, the optical distribution device used in the near-infrared spectroscopy is a useful invention having the advantage that the analysis by eight components at the same time can be configured by receiving the incident signal from the 64 probes, which is expected to be used in the industry.

1 is a conceptual diagram showing the overall configuration according to the present invention,
Figure 2 is an exemplary view showing the location of each region of the probe and the air ejector according to the present invention,
3 is a schematic configuration diagram of a light distribution device according to the present invention;
4 is a conceptual diagram showing the principle of simultaneous selection of components and colors composed of one conveyor,
5 is a conceptual diagram showing the principle of component and color multi-stage selection composed of two conveyors,
6 is a conceptual diagram showing component selection by conventional near infrared spectroscopy,
7 is a conceptual diagram illustrating an optical splitter used in the near infrared spectroscopy.

Hereinafter, the configuration and the operation of the embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

1 is a conceptual diagram showing the overall configuration according to the present invention. As shown, the waste plastic is configured to be transported along the conveyor 1, and the upper part near the end of the conveyor 1 is disposed from the light source 2 and the waste plastic for component analysis and color selection of the plastic before the plastic falls. The probe 3 to which the reflected light is incident is installed. At this time, the plastic to be transported can be any kind of plastic, but preferably configured to be transported, such as representative plastic PET, PE, PP, PS, ABS, PVC.

Since the probe 3 is composed of 64 optical fiber coupling parts, which are input terminals of the optical distribution device 4, a maximum of 64 probes can be installed. In this way, it was possible to analyze eight components at the same time. The 64 probes 3 are connected to an optical fiber and are connected to an optical fiber fastening part, which is an input terminal of the optical distribution device 4, respectively. The 64 probes 3 are arranged above the conveyor 1 according to the size of the conveyor 1 belt width. Of course, not all probes 3 should always be in mode mode on the top of the conveyor 1 at all times, and the number may vary depending on the actual width of the conveyor 1 and the size of the probe 3. In addition, it may be divided into two conveyors (1) instead of one conveyor (1) may be divided into 32 when the multi-stage sorting, and likewise, the number of installation may vary depending on the width of the conveyor (1) as well. .

The light source 2 is preferably positioned before and after the probe 3 on the basis of the longitudinal direction of the conveyor belt by using a halogen lamp so that when the waste plastic conveyed through the conveyor 1 passes under the probe 3 , And the light irradiated from the light source 2 is reflected on the plastic surface to be introduced into the probe 3. In addition, at least two light sources 2 were installed per four probes 3 to allow sufficient irradiation. The installation direction of the light source 2 is to position the probe 3 in the center, and based on this, the light source 2 is inclined at both sides.

In the optical distribution device 4, the light rays introduced into the optical fiber through the probe 3 are divided into visible light and near infrared rays, and then the visible light goes to the RGB sensor 5 among the light rays separated by near infrared light and visible light, respectively, and the near infrared light is NIR. The spectrometer 6 was configured to convert photons into electrons and transmit the signal to the analysis control unit 7.

The analysis control unit 7 analyzes the incoming electronic signal from the color signal and the electronic signal from the NIR spectrometer 6, and also absorbs general-purpose plastics (PET, PE, PP, PS, ABS, PVC, etc.) made of a database. When it is matched with the value of the spectrum and the near-infrared absorption spectrum value, the plastic component is recognized, and the color signal from the RGB sensor 5 is also HSI value (Hue, Saturation, Intensity). It is configured to recognize the component and color at the same time using the value derived by converting to)).

In addition, the analysis control unit 7 according to a predefined processing procedure, if the component and color of the plastic detected by the specific probe (3) of the 64 probe (3) corresponds to the value to be selected, the bottom of the probe (3) Operate the air ejector (8) located in to sort the falling plastic.

At this time, the time taken to transfer to the end of the conveyor 1 after being detected by the probe 3 and the time of meeting with the high pressure air discharged by the air ejector 8 during the fall are calculated in advance so as to be precisely discharged.

In the figure, the conveyor encoder 9 is a device for controlling the drive motor speed of the conveyor 1, but the circuit connection line is omitted for convenience, and the air pressure sensor 10 is the air ejector 8 although the circuit connection line for the convenience is omitted. A sensor that measures the amount of compressed air supplied to the Only when the information of such a device is synthesized, as described above, precise control of the air ejector 8 is possible, thereby precisely sorting the plastic.

Figure 2 is an exemplary view showing the position of each probe and the air ejector according to the present invention, as shown in the plurality of probes 3 on the upper side by a predetermined width area relative to the width direction of the conveyor (1) You can see that it is installed and arranged. In this way, it can be seen that the light rays (near infrared rays and visible rays) irradiated by the light sources reflected by the respective regions are incident.

It can be seen that the air ejectors 8 are formed at the lower side of the conveyor 1 for each region corresponding to the probe 3.

In addition, as shown in accordance with one embodiment it can be seen that the air ejector (8) is composed of two different angles in the upper and lower rows, it is possible to select the number of branches of the type or color of the plastic sorting in the same area. .

Thus, the air ejector 8 can be comprised only by one row | line | column, and can also be comprised by two or more rows | paragraphs. However, since it is difficult to select the excessive multi-stage array, it is preferable to configure the 1 ~ 2 stage arrangement.

3 is a schematic configuration diagram of a light distribution device according to the present invention. As shown, the optical distribution device 4 that divides visible light and near infrared light when 64 light rays are incident for simultaneous selection of components and colors according to the present invention uses a halogen lamp as a light source 2 to externally display visible light and near infrared light. By irradiating the recycled plastics, the light beams reflected from the plastic are collected and introduced into up to 64 light incidence parts. The light beams are rotated at a maximum speed of 70 Hz per second by the rotation mirror 47 which rotates by angular velocity control. When the light beam is emitted to one fixed mirror 41, the emitted light beam passes through the dichroic mirror 45 and is separated into near infrared light and visible light.

Specifically, as shown, a total of 64 optical fibers are fastened in the optical fiber fastening part 42, and when the light source is drawn through the optical fiber fastened in this way, the rotating mirror 47 reflects the light rays which are input from the 64 optical fibers, respectively. After collecting the light rays through the fixed mirror 41 through the light source collecting lens 44, the passed light passes through the dichroic mirror 45, while near-infrared rays are transmitted as they are to collect near-infrared rays. The focus is again focused by the lens 46, and the visible light is reflected by the dichroic mirror 45 and focused by the lens 43 for collecting visible light.

Thereafter, the near infrared ray passing through the near infrared ray collecting lens 46 goes to the NIR spectrometer 6, and the visible ray passing through the visible ray collecting lens 43 goes to the RGB sensor 5.

The motor 48 connected to the lower part of the rotating mirror 47 rotates the rotating mirror 47 at 70 Hz in a maximum of 1 second, and serves to sequentially transmit light beams simultaneously input from 64 optical fibers to the fixed mirror 41.

The visible light collecting lens 43 is installed in a cylindrical branch pipe branched in front of a cylindrical pipe in which a dichroic mirror 45 is installed.

The near-infrared collecting lens 46 is installed in a cylindrical tube provided with a dichroic mirror 45.

4 is a conceptual diagram showing the principle of simultaneous selection of components and colors composed of one conveyor. When plastics having various components and various colors are supplied through the conveyor 1, the conveyor 1 is installed at the end of the conveyor 1. The light from the light source 2 is irradiated toward the conveyor 1 and then reflected on the surface of the plastic being conveyed onto the conveyor and then incident on the probe 3. Then, the light drawn from the probe 3 is transmitted to the optical splitter 4 through the optical fiber, and the optical splitter 4 separates the incident light into near infrared and visible light, and the visible light is sent to the RGB sensor 5. The near infrared rays are transmitted to the NIR spectrometer 6. Then, the photons are converted into electrons in the RGB sensor 5 and the NIR spectrometer 6 to transmit a signal to the analysis controller 7.

The analysis control unit 7 analyzes the incoming electronic signal from the color signal and the electronic signal from the NIR spectrometer 6, and also absorbs general-purpose plastics (PET, PE, PP, PS, ABS, PVC, etc.) made of a database. The plastic component is recognized when it is matched by comparing with the value of the spectrum and the near-infrared absorption spectrum, and the signal from the RGB sensor 5 is also HSI value (Hue, Saturation, Intensity). It is configured to recognize the component and color at the same time using the value derived by converting

In addition, the analysis control unit 7 according to a predefined processing procedure, if the component and color of the plastic detected by the specific probe (3) of the 64 probe (3) corresponds to the value to be selected, the bottom of the probe (3) Operate the air ejector (8) located in to sort the falling plastic.

By the configuration as described above it can be seen that the component and color selection is possible in the sorting process through one conveyor (1).

According to the configuration described above step by step how to simultaneously sort the components and colors of the plastic in one conveyor (1).

The sorting step of the present invention comprises the steps of supplying a plastic having a variety of components and colors to the conveyor;

Irradiating light onto the plastic being transferred and injecting the reflected light into the probe 3;

Separating the incident light into near-infrared and visible light in the light distribution device 4;

Converting the separated visible light into a color signal by an RGB sensor;

The NIR spectrometer (6) converts the separated near infrared into a value signal of an absorption spectrum;

An analysis control unit (7) recognizing the plastic component by comparing the value signal of the absorption spectrum of the NIR spectrometer (6) with the value of the absorption spectrum of the general-purpose plastic made of a group database;

Analyzing the control unit 7 to recognize the color of the plastic by comparing the color signal of the RGB sensor 5 to the HSI value derived by converting the color signal to the HSI value;

The analysis control unit 7 determines whether the recognized component and color correspond to a predefined sorting plastic, and in the case of the sorting plastic, operates the air ejector 8 corresponding to the area of the probe 3 which sends the information. And sorting the falling plastic.

When the air ejector 8 corresponds to the probe 3 over a plurality of regions, all the air ejectors 8 corresponding to the probe 3 are operated.

5 is a conceptual diagram showing the principle of component and color multi-stage selection composed of two conveyors, and it can be seen that the multi-stage selection screening the components and colors using the two conveyors 1 and 1 '. In the primary conveyor (1), the component analysis was first performed, and through this, only the plastic of a specific component was configured to perform color selection again on the secondary conveyor (1 '). This configuration makes it possible to select components and colors in large quantities.

First, the component analysis by the primary conveyor 1 will be described. As shown in the drawing, plastics having various components and various colors are supplied so that light from the light source 2 installed at the end of the conveyor 1 can be conveyed to the conveyor 1. It is irradiated to the side, and then reflects onto the surface of the conveying plastic on the conveyor (1) to enter the probe (3). Then, the light drawn from the probe 3 is transmitted to the optical splitter 4 through the optical fiber, and the optical splitter 4 separates the incident light into near infrared and visible light, and the visible light is sent to the RGB sensor 5. The near infrared rays are transmitted to the NIR spectrometer 6. Then, the photons are converted into electrons in the RGB sensor 5 and the NIR spectrometer 6 to transmit a signal to the analysis controller 7.

The analysis control unit 7 analyzes only the electronic signal coming from the NIR spectrometer 6 among the incoming electronic signals, and also the absorption spectrum value of the general plastics (PET, PE, PP, PS, ABS, PVC, etc.) made of the database. Compared with the near-infrared absorption spectrum value introduced, if the plastic component is matched and the component of the plastic detected by the specific probe 3 among the 64 probes 3 corresponds to the value to be selected, the corresponding probe 3 ) Selecting the falling plastic by operating the air ejector (8) located at the bottom.

The type of plastic to be sorted is input to the analysis control unit 7 before screening for component analysis as described above, and configured to operate when a value for a specific component is detected.

In addition, if the color analysis by the secondary conveyor (1 ') will be described as shown, only the plastic to be sorted through the primary conveyor (1) is screened by the air ejector (8) to the secondary conveyor (1') When supplied, the conveyor 1 'is supplied with plastic of a certain component and plastic of various colors. Then, the light from the light source 2 installed at the end of the conveyor (1 ') is irradiated toward the conveyor (1'), and then reflected on the surface of the plastic being transported on the conveyor 3 is incident to the probe (3). Then, the light drawn from the probe 3 is transmitted to the optical splitter 4 through the optical fiber, and the optical splitter 4 separates the incident light into near infrared and visible light, and the visible light is sent to the RGB sensor 5. The near infrared rays are transmitted to the NIR spectrometer 6. Then, the photons are converted into electrons in the RGB sensor 5 and the NIR spectrometer 6 to transmit a signal to the analysis controller 7.

The analysis controller 7 analyzes only the color signal of the incoming electronic signal. To do this, the signal from the RGB sensor 5 is converted into an HSI value (Hue, Saturation, Intensity) to recognize the color using a value derived therefrom, and then the predefined processing is performed. According to the procedure, if the color of the plastic detected by the specific probe 3 among the 64 probes 3 corresponds to the value to be screened, the plastic dropped by operating the air ejector 8 located at the bottom of the probe 3. Will be screened.

At this time, by configuring the air ejector 8 in multiple stages can be configured to screen two or more at a time. The process of selecting two colors with specific components in the figure is shown.

As described above, the present invention may be configured to perform component analysis on the primary conveyor 1 and color sorting on the secondary conveyor 1 by presetting of the analysis control unit 7. 4) because it uses the same device, you do not need to prepare a separate device, it can be seen that it is very simple and convenient to configure the system.

According to the configuration described above step by step how to screen the components and color of the plastic in two conveyors (1, 1 ') as follows.

First, look at the sorting step for each component in the primary conveyor.

The sorting step of the present invention comprises the steps of supplying a plastic having a variety of components and colors to the conveyor (1);

Irradiating light onto the plastic being transferred and injecting the reflected light into the probe 3;

Separating the incident light into near-infrared and visible light in the light distribution device 4;

The NIR spectrometer (6) converts the separated near infrared into a value signal of an absorption spectrum;

An analysis control unit (7) recognizing the plastic component by comparing the value signal of the absorption spectrum of the NIR spectrometer (6) with the value of the absorption spectrum of the general-purpose plastic made of a group database;

The analysis control unit 7 determines whether the recognized component corresponds to a pre-defined plastic to be screened, and if the plastic is to be screened, operates the air ejector 8 corresponding to the area of the probe 3 to which the information is sent. Sorting the plastic; the primary component sorting step consisting of;

Look at the step of sorting by color in the secondary conveyor (1 ') with the plastic selected by the primary component selection step.

The sorting step of the present invention comprises the steps of supplying a plastic having a variety of colors consisting of a specific component to the conveyor (1 ');

Irradiating light onto the plastic being transferred and injecting the reflected light into the probe 3;

Separating the incident light into near-infrared and visible light in the light distribution device 4;

Converting the separated visible light into a color signal by an RGB sensor;

Analyzing the control unit 7 to recognize the color of the plastic by comparing the color signal of the RGB sensor 5 to the HSI value derived by converting the color signal to the HSI value;

The analysis control unit 7 determines whether the recognized color corresponds to a predefined sorting plastic, and if it is sorting plastic, operates the air ejector 8 corresponding to the area of the probe 3 that sends the information and is falling. And sorting the plastic; consisting of a second color sorting step.

When the air ejector 8 corresponds to the probe 3 over a plurality of regions, all the air ejectors 8 corresponding to the probe 3 are operated.

The following is a preferred embodiment of the present invention.

(Example 1)

Example 1 below describes a method of simultaneously sorting blue PET from waste plastic being transported through a conveyor. Three plastics were used in the examples. Hereinafter, reference numerals correspond to the reference numerals shown in FIGS. 1 to 5.

When various colors of plastics consisting of PET, PE, PP, PS, ABS, and PVC, which are classified as plastics, are supplied to the conveyor through a supply device such as a vibration hopper, a plurality of probes 3 are directed to the halogen lamp light source 2 toward the conveyor. ) Continuously irradiates light. At this time, the white PP, blue PET and red PET component plastics are transported on the conveyor belt in different areas, and receive the light emitted from the light source 2 at the position before the dropping point, and reflects it again. It enters into the installed probe 3.

The light incident on each region probe 3 is separated into near-infrared and visible light in one light distribution device 4 so that the visible light passes through the RGB sensor 5 and transmits the color signal to the analysis controller 7. The near-infrared rays are transmitted to the analysis control unit 7 through the NIR spectrometer 6 while transmitting a value signal of the absorption spectrum.

The analysis control unit 7 selects one PP and two selected from the information of the absorption spectrum transmitted by comparing the value of the absorption spectrum of the plastic transmitted from the NIR spectrometer 6 with the value of the absorption spectrum of the general-purpose plastic made of the existing database. You will notice that there are PET-based plastics.

At the same time, the analysis controller 7 recognizes that the color of the plastic is white, blue, or red by comparing the color signal of the RGB sensor 5 to the HSI value, and comparing the HSI value for each color made in the database. It is confirmed that there is a blue to be selected.

Afterwards, the analysis controller 7 recognizes that the color of one of the two PET plastics detected in the specific area corresponds to the blue color to be selected, and thus the probe 3 located at the bottom of the conveyor in the area below the probe 3 is selected. The air ejector 8 corresponding to) is operated to sort out the blue PET component plastic. The remaining white PP and red PET-based plastics are simply dropped without the air ejector (8) running. As a result, the plastic of a specific color having a specific component is selected.

(Example 2)

Hereinafter, Example 2 describes a method of sorting PE in a primary sorting conveyor among waste plastics transported through a conveyor, and sorting blue and white PE in a second conveyor among sorted PEs. In the examples, four plastics were used. Hereinafter, reference numerals correspond to the reference numerals shown in FIGS. 1 to 5.

When various colors of plastics consisting of PET, PE, PP, PS, ABS, and PVC, which are classified as plastics, are supplied to the conveyor through a supply device such as a vibration hopper, a plurality of probes 3 are halogen lamps toward the conveyor 1. Light is continuously emitted from the light source 2. At this time, the green PE, the white PE, the blue PE, and the green PET component plastic are transferred on the conveyor belt in different areas, and receive the light emitted from the light source 2 at the position before the dropping point, and reflect it again. Incident to the probe 3 provided for each area.

The light incident on each region probe 3 is separated into near-infrared and visible light in one light distribution device 4 so that the visible light passes through the RGB sensor 5 and transmits the color signal to the analysis controller 7. The near-infrared rays are transmitted to the analysis control unit 7 through the NIR spectrometer 6 while transmitting a value signal of the absorption spectrum.

The analysis control unit 7 compares the value of the absorption spectrum value of the plastic transmitted from the NIR spectrometer 6 with the values of the absorption spectrum of the general-purpose plastic made of the existing database. It will be appreciated that there is one PET component plastic.

Thereafter, the analysis control unit 7 operates the air ejector 8 corresponding to the probe 3 located at the bottom of the conveyor in the area located below the probe 3 that detects the three PE plastics detected in the specific area. The component plastics are screened.

When this operation is completed, the primary screening for each component is terminated.

After that, the selected green PE, white PE and blue PE were transferred through the secondary conveyor 1 '. When the three plastics are transported toward the end of the conveyor 1 ', a plurality of probes 3 continuously emit light from the halogen lamp light source 2 toward the conveyor 1'. At this time, the green PE, the white PE and the blue PE component plastics are transferred on the conveyor belt in different areas, and receive the light emitted from the light source 2 at the position before the dropping point, and reflects the light again to install the probe for each area. It enters into (3).

The light incident on each region probe 3 is separated into near-infrared and visible light in one light distribution device 4 so that the visible light passes through the RGB sensor 5 and transmits the color signal to the analysis controller 7. The near-infrared rays are transmitted to the analysis control unit 7 through the NIR spectrometer 6 while transmitting a value signal of the absorption spectrum.

The analysis controller 7 recognizes that the color of the plastic is green white, blue, and red by comparing the color signal of the RGB sensor 5 to the HSI value and comparing it with the HSI value for each color made in the database. You will notice that there are blue and white colors to choose from.

Thereafter, the analysis control unit 7 corresponds to the air ejector 8 corresponding to the probe 3 located at the bottom of the conveyor in the region located below the probe 3 detecting the two blue and white PE plastics detected in the specific region. ) To sort the PET-based plastics.

At this time, the blue color is operated by the upper stage air discharger 8, and the white color is discharged by operating the air discharger 8 located below the upper end. The air ejector 8 of the upper and lower ends is separated by the discharge angle is set differently, and the position of the yard is separated, so that automatic color selection is made. After this process, the secondary screening by color ends.

By the first and second multi-stage sorting as described above, the plastic having a specific component is selected by a specific color.

The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by any person having ordinary skill in the art without departing from the gist of the present invention claimed in the claims. Of course, such changes will fall within the scope of the claims.

<Explanation of symbols for the main parts of the drawings>
(1, 1 '): conveyor (2): light source
(3): probe (4): optical distribution device
(5): RGB sensor (6): NIR spectrometer
(7): analysis control unit (8): air ejector
(9): Encoder for conveyor (10): Air pressure sensor
41: fixed mirror 42: optical fiber fastening portion
(43): lens for collecting visible light (44): lens for collecting light source
45: dichroic mirror 46: near-infrared collection lens
47: rotating mirror 48: motor

Claims (14)

delete A first conveyor for conveying waste plastic having various components and colors; A second conveyor for transporting waste plastics having various colors of specific components selected from the first conveyor; A plurality of light sources installed on the first and second conveyors to irradiate light rays; A light distribution device that separates a plurality of probes installed on the first and second conveyors and the light rays incident from the probes so that the light rays emitted from the light source reflect the surface of the waste plastic and detect incident light rays; In the real-time waste plastic component and color sorting apparatus using a light distribution device, including; an air ejector installed in the lower portion of the first conveyor and the second conveyor for discharging waste plastic,
In order to separate light rays incident from multiple probes into near-infrared and visible light, the optical fiber connection part to which optical fibers connected to 64 probes are fastened, and the light rays simultaneously input from 64 optical fibers through the optical fiber connection part are sequentially sent to the fixed mirror. A rotating mirror connected to a motor having a rotational speed of up to 70 Hz per second, a fixed mirror for emitting incident light to a dichroic mirror, a light source collecting lens for collecting light reflected from the fixed mirror, a light source A dichroic mirror that separates the collected light into near-infrared and visible light with the collecting lens, and a near-infrared collecting lens and dichroic mirror that captures and focuses near-infrared light passing through the dichroic mirror, and exits it with an NIR spectrometer. The dichroic mirror is installed to capture and focus the visible light reflected by the light, and to emit it with the RGB sensor. The optical distributor configured to clearance in the front end include a visible light collecting lenses provided in the branched cylinder branch pipe and;
A NIR spectrometer for converting near-infrared rays of the plastic on the first conveyor from the light distribution device into absorption spectrum electronic signal values;
An RGB sensor for converting visible light on the second conveyor from the light distribution device into a color signal;
Analyze the electronic and color signals input from the NIR spectrometer and RGB sensor, and compare them with pre-stored databases to determine whether they are plastic components and colors to be sorted. Analysis and control unit for operating the air discharger in charge of; real-time waste plastic component and color sorting apparatus using a light distribution device, characterized in that consisting of. delete delete delete delete delete delete delete delete delete delete delete delete

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