JPH1151884A - Device for discriminating kind of glass - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device for discriminating kind of glass capable of discriminating the discrimination of kind of glass of a glass piece produced by breakage of a Braun tube at a high speed nondestructively and on-line. SOLUTION: A glass kind device for discrimination kind of glass of glass pieces 1, 2 produced by breakage of a Braun tube is provided with a radiation source 3 irradiating the glass pieces 1, 2 with an X-ray 4 or γ ray, a characteristic wavelength optical detector 6 detecting the characteristic wavelength light 5 of element characteristics secondarily generating from the constituent element of the glass pieces 1, 2 by nuclear reaction of the irradiated X-ray 4 or γ ray and a judging circuit 8 discriminating the kind of glass of the glass pieces 1, 2 broken by a signal from the specific wavelength optical detector 6, preferably a conveyor transporting the glass pieces 1, 2. The glass pieces 1, 2 are irradiated with the X-ray or γ ray on the conveyor line, and the kind of glass of the broken glass pieces 1, 2 is discriminated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for identifying the type of glass of broken CRT glass pieces in a waste recycling facility such as a home television or a display.

[0002]

2. Description of the Related Art Lead glass is partly used for CRT glass for the purpose of electromagnetic shielding. To effectively recycle waste, lead glass and non-lead glass in a waste CRT constituent material are used. Need to be separated. Conventionally, the boundary between lead glass and non-lead glass has been visually determined, cut by means such as a wire cutter, and then ground into glass types.

[0003]

However, the discrimination of the glass type boundary and the cutting with a wire cutter or the like are all performed manually, which requires a great deal of labor. The present invention has been made in view of the above technical problems, and an object of the present invention is to provide a glass type identification device capable of non-destructively and on-line high-speed identification of glass type of glass pieces generated by crushing a cathode ray tube.

[0004]

According to the first aspect of the present invention,
In a glass type identification device for glass fragments generated by crushing of a cathode ray tube, the crushed glass fragments are subjected to X-ray or γ
A radiation source for irradiating a ray, a characteristic wavelength photodetector for detecting a characteristic wavelength light peculiar to an element that is secondarily generated from a constituent element of the glass piece by a nuclear reaction due to the irradiated Χ ray or γ ray, A determination circuit for identifying a glass type of the crushed glass piece based on a signal from the characteristic wavelength photodetector.

Preferably, the apparatus further comprises a conveyor for transporting the glass pieces, wherein the glass pieces are crushed by irradiating the glass pieces with 該 -rays or γ-rays on the conveyor line. The glass type may be identified, and more preferably, as described in claim 3, the radiation, the characteristic wavelength photodetector, and a part of the conveyor around the identification position are shielded structures that shield X-rays. Good to cover.
Further, when the glass piece has a thickness variation, the conveyor is made of a radiolucent material as described in claim 4, and the radiation source and the glass piece are conveyed on the conveyor. It is preferable to use a device in which a characteristic wavelength photodetector is disposed below the conveyor.

[0006] Since the present invention is configured as described above, the characteristic wavelength light (characteristic X-ray) having a different energy spectrum for each of the constituent elements is emitted from the ground glass piece by irradiation with Χ-rays or γ-rays. Occurs next. For lead,
10.6 keV, 72.8 keV, 75.0 keV, 8
It has a characteristic wavelength light of energy such as 4.9 keV. The characteristic wavelength light (characteristic X-ray) is detected by a characteristic wavelength light detector such as a Χ-ray detector, and the detection signal is analyzed by a wavelength analyzer or the like. Lead glass and non-lead glass are distinguished. In addition, it is also possible to discriminate by analyzing the element components characterizing the glass species in addition to lead.

In addition, the present invention allows the glass type of lead glass and non-lead glass to be identified online by a determination circuit for identifying the glass type of the crushed glass piece. It is also possible to automate the waste CRT recycling process by combining it with a separation device.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will now be described in detail with reference to the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the present invention unless otherwise specified, and are merely illustrative examples. Only. A CRT broken glass identification device according to a first embodiment of the present invention will be described with reference to FIG.

In the figure, reference numeral 7 denotes a radiation shielding box in which a thin conveyor 10 is inserted in the box 7 along the horizontal direction. In the space above the thin conveyor 10 in the box 7, a Χ-ray tube 3 for irradiating the broken glass pieces 1, 2 conveyed on the thin conveyor 10 with Χ-rays 4, and a nuclear reaction by the irradiated ４-rays 4, Χ-ray detector 6 for detecting characteristic X-rays 5 unique to lead elements secondary generated from constituent elements of glass pieces
Is stored. A signal line from the Χ-ray detector 6 is led out of the radiation shielding box 7 and connected to a determination circuit 8 for identifying a glass type of a crushed glass piece based on a signal from the detector 6. 9 is a separation device, and the box 7
The lead-free glass 1 ′ and the lead glass 2 ′ which are arranged at the exit end of the thin conveyor 10 conveyed outside and are conveyed by the thin conveyor 10 in the sorting device 9 based on the identification signal from the determination circuit 8. Are collected separately.

Next, the operation of such an apparatus will be described. As shown in FIG. 1, the Χ-ray 4 generated by the Χ-ray tube 3 is applied to glass pieces 1 and 2 to be identified which have been crushed in advance.
From the object, characteristic X-rays 5 of the constituent elements are secondarily generated. This is detected using a Χ-ray detector 6, and whether or not a peak is detected in an energy region specific to the lead element, that is, whether the target object is the lead glass 2 or the non-lead glass 1 is determined by the determination circuit 8. Identify. The identification signal is sent to the sorting device 9, where the lead glass 2 'and the non-lead glass 1' are separated. In this device, in order to prevent leakage around the X-ray,
The transport space of the thin conveyor 10 at the X-ray detector 6 and the identification position is covered by the shielding box 7. The material of the shielding box 7 is preferably a heavy metal other than the detection target element.

Next, a second embodiment of the present invention will be described with reference to FIG. The second embodiment is a glass piece 1 to be identified,
2 is an example of the device configuration when there is a variation in the thickness of the device No. 2;
The intensity of the Χ-ray detection signal is inversely proportional to the square of the distance between the surfaces of the objects 1 and 2 and the detector. In the case of the first embodiment shown in FIG. 1, since the bottom surfaces of the objects 1 and 2 are placed on the thin conveyor 10, the bottom surface serves as a reference surface. The distance between the detectors depends on the thickness of the piece of glass. As a result, even if the lead content is the same, if the thickness of the glass piece is different, the intensity of the detected characteristic X-ray is different. When the variation due to the thickness affects the discrimination of the glass type, the 管 -ray tube 3 and the Χ-ray detector 6
Is placed in the space below the thin conveyor 10 and the thin conveyor 1
By irradiating and detecting through 0, the distance between the object surface detectors can be kept constant. Thin conveyor 10
From the viewpoint of line transmittance, the thinner the better, the better the material is a light element such as resin.

Next, a third embodiment of the present invention will be described with reference to FIG. In the third embodiment, a radioisotope γ-ray source 11 such as cobalt 60 is used instead of the X-ray tube 3,
The line 12 is irradiated on the crushed glasses 1 and 2 to be identified. gamma ray 1
The characteristic X-ray 5 can be generated in the same manner as in the case of using the Χ line even if the line 2 is used. According to this embodiment, the radiation isotope γ-ray source 11 does not require a power source and is constantly radiated, so that the identification device can be reduced in size and power consumption.

[0013]

As described above, according to the present invention, it becomes possible to perform online glass type identification after batch crushing of CRTs that required manual sorting and sorting in glass recycling, and to process them by combining with existing sorting equipment. Speedup and labor saving.

[Brief description of the drawings]

FIG. 1 is a configuration explanatory view showing a cathode ray tube crushed glass identification device according to a first embodiment of the present invention.

FIG. 2 is a configuration explanatory view showing a CRT crushed glass identification device according to a second embodiment of the present invention.

FIG. 3 is a configuration explanatory view showing a CRT crushed glass identification device according to the first embodiment of the present invention.

[Explanation of symbols]

 1, 2 Fragmented glass pieces 1 'Lead-free glass 2' Lead glass 3 X-ray tube 4 X-ray 5 Characteristic X-ray 6 X-ray detector 7 Shielding box 8 Judgment circuit 9 Sorting device 10 Thin conveyor 11 Radioisotope gamma ray source 12 γ-ray

Claims (4)

[Claims] 1. An apparatus for identifying a glass type of a glass piece generated by crushing a cathode ray tube, comprising: a radiation source for irradiating the crushed glass piece with Χ-rays or γ-rays; A characteristic wavelength photodetector for detecting characteristic wavelength light unique to the element secondary generated from the constituent elements of the glass piece; and a determination for identifying the glass type of the crushed glass piece based on a signal from the characteristic wavelength photodetector. A glass type identification device comprising a circuit. 2. The method according to claim 1, further comprising the step of: providing a conveyor for transporting the glass piece, and identifying the glass type of the crushed glass piece by irradiating the glass piece with Χ-rays or γ-rays on the conveyor line. The glass type identification device according to claim 1. 3. The glass type identification apparatus according to claim 2, wherein a part of the radiation, the characteristic wavelength photodetector, and a conveyor around the identification position are covered with a shielding structure that shields X-rays. . 4. The apparatus according to claim 1, wherein the conveyor is made of a radiation-transmissive material, and the radiation source and the characteristic wavelength photodetector are disposed below the conveyor with respect to a glass piece conveyed on the conveyor. The glass type identification device according to claim 2, wherein