JP2018176002A - Method and apparatus for recovering glass sheet of solar cell module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To separate a glass material of a solar battery module from other members and take out the glass material in a form of a plate.SOLUTION: A glass/sealing material laminate 29, which is a laminate formed of a sealing material 22 for surrounding and sealing a solar battery cell 23 taken out from a solar battery module 20, and a cover glass 21, is immersed and heated in a heated liquid 12 (S2). Then, the sealing material 22 is scraped and peeled off from the cover glass 21 while the glass/sealing material laminate 29 is immersed and heated in the heated liquid 12 (S3).SELECTED DRAWING: Figure 1

Description

  The present invention relates to a method and a device for collecting plate glass of a solar cell module. More specifically, the present invention relates to a technique for taking out a glass material from a solar cell module in a plate-like state and in a state in which a sealing material is removed.

  In the description of the present invention, the solar battery module is used to mean one in which a plurality of solar battery cells are arranged and packaged.

  A conventional method of recycling a solar cell module is, for example, a method of recycling a solar cell module, in which a glass material and a solar cell element are laminated and a back protective material is adhered with a predetermined filler. A crushing step of crushing a cell element, a softening step of heating and softening a filler adhering to the crushed glass material and solar cell element, and a softened filling of the solar cell module in which the glass material and solar cell element are broken There is a process including a separation process of separating a back surface protection material by applying a blade to the material, and a grinding process of crushing a glass material and a solar cell element from which the back surface protection material is separated (Patent Document 1).

JP, 2011-173099, A

  However, in the recycling method of the solar cell module of Patent Document 1, since the glass material and the solar cell element are crushed, the product obtained as a result of the treatment can be used “for recycling as road repair material etc. “Crushed glass material”, which has much lower industrial and commercial value compared to the state of the original flat glass, and the original value as a member is preserved and maintained in recycling (in other words, materials and components) It can not be said that it is a method with high practical benefits.

  In the recycling method of the solar cell module of Patent Document 1, a blade is applied to the softened filling material to separate the back surface protection material. In this process, the filling material and the back surface protection material are reliably made. There is a problem that it can not be completely separated.

  Then, this invention aims at providing the collection method and collection | recovery apparatus of the plate glass of the solar cell module which can separate the glass material of a solar cell module with another member, and can take it out in plate shape.

  In order to achieve the above object, in the method for recovering plate glass of a solar cell module of the present invention, a laminate of an encapsulant and a cover glass for enclosing and sealing a solar cell taken out from the solar cell module is a warming solution After being immersed and warmed in the interior, the laminated body is immersed in the heating liquid and the sealing material is scraped off from the cover glass while being heated.

  Moreover, the recovery apparatus of the plate glass of the solar cell module of this invention has a heating tank and a scraping means provided with a heat source while storing a heating liquid, and surrounds the solar cell taken out from the solar cell module The laminate of the sealing material to be sealed and the cover glass is placed in a heating tank, immersed in a heating solution heated by a heat source and heated, and then the laminate is immersed in a heating solution. The sealing material is scraped off from the cover glass by the scraping means while heating.

  Therefore, according to the recovery method of the plate glass of these solar cell modules and the recovery device of the plate glass of the solar cell module, the laminate of the sealing material and the cover glass is immersed in the heating liquid and sealed while being heated Since the material is scraped off, the sealing material is completely and easily removed from the cover glass by a simple process / mechanism. In addition, the cover glass is not damaged or broken, and the dirt and the like such as the sealing material are separated and collected as they are intact and free plate glass which is not attached to the surface.

  In the method and apparatus for recovering plate glass of the solar cell module of the present invention, the heating liquid may be at least one of silicone oil and engine oil. In this case, induction of the sealing material to the softened state is more appropriately performed.

  In the method and apparatus for recovering plate glass of the solar cell module of the present invention, the temperature of the heating liquid may be adjusted to 90 to 400 ° C. In this case, induction of the sealing material to the softened state is more appropriately performed.

  In the method of recovering sheet glass of the solar cell module of the present invention, at least one of a scraper, a polisher, and an abrasive roll may be used to scrape off the sealing material from the cover glass. The recovery device of the plate glass of the battery module may be configured such that the scraping means is at least one of a scraper, a polisher, and a rubbing roll. In these cases, the process of scraping the sealing material is performed more appropriately.

  According to the method of collecting plate glass of the solar cell module and the collecting device of plate glass of the solar cell module of the present invention, since the sealing material can be completely and completely removed from the cover glass by a simple process and mechanism. Processing cost can be reduced. In addition, the cover glass can be separated and recovered as it is intact and free plate glass with no dirt or dust such as a sealing material attached to the surface without breakage or breakage of the cover glass, so that the cover glass can be reused. Only the cover glass can be separated and recovered, and it is possible to separate and collect only the cover glass while maintaining and maintaining the original value as a member, and practical use as a solar cell module recycling / reuse method. It is possible to enhance the above effects and improve the usefulness.

  When the heating liquid is made to be silicone oil or engine oil, the method of recovering the plate glass of the solar cell module or the recovery device of the plate glass of the solar cell module according to the present invention Since it can be carried out more appropriately, it becomes possible to well carry out separation and recovery of intact intact glass sheet with no dirt such as a sealing material attached to the surface. Moreover, since silicone oil and engine oil are relatively inexpensive, the processing cost can be further reduced.

  In the method for recovering plate glass of a solar cell module of the present invention or the recovery device for plate glass of a solar cell module, when the temperature of the heating liquid is adjusted to 90 to 400 ° C., the sealing material is softened Can be carried out more appropriately, so that it is possible to well carry out separation and recovery of intact intact glass sheet with no dirt such as a sealing material attached to the surface. Moreover, since the energy input amount can be reduced, the processing cost can be further reduced.

  The method of recovering a plate glass of a solar cell module or the recovery device of a plate glass of a solar cell module according to the present invention uses a scraper, a polisher, or an abrasive roll to scrape off the encapsulant. Since it is possible to more appropriately carry out the scraping treatment, it is possible to satisfactorily carry out separation and recovery of intact intact glass sheet which is not attached to the surface with dirt such as a sealing material.

It is a flowchart explaining an example of embodiment of the collection method of the plate glass of the solar cell module which concerns on this invention. It is a figure which shows the outline | summary of an example of the structure of the collection | recovery apparatus of the plate glass of the solar cell module which can enforce the collection method of the plate glass of the solar cell module which concerns on this invention. It is sectional drawing which shows the outline | summary of an example of the structure of the solar cell module with which the collection | recovery method of the plate glass of the solar cell module which concerns on this invention can be applied.

  Hereinafter, the configuration of the present invention will be described in detail based on an example of the embodiment shown in the drawings.

  FIGS. 1 to 3 show an example of an embodiment of a method and an apparatus for collecting plate glass of a solar cell module of the present invention.

  In the method of recovering the plate glass of the solar cell module of the present embodiment, the solar cell 23 is taken out from the solar cell module 20 by removing the aluminum frame 25 and the back sheet 24 from the solar cell module 20 (S1) After the glass-sealing material laminate 29 which is a laminate of the sealing material 22 to be sealed and the cover glass 21 is immersed in the heating liquid 12 and heated (S2), the glass-sealing material lamination is performed. While the body 29 is immersed in the heating liquid 12 and heated, the sealing material 22 is scraped from the cover glass 21 (S3) (FIG. 1).

  Moreover, the recovery apparatus 10 of the plate glass of the solar cell module of this embodiment has the heating tank 11 and the scraping means 13 provided with a heat source (not shown) while storing the heating liquid 12, and from the solar cell module 20 The glass / sealing material laminate 29 which is a laminate of the sealing material 22 and the cover glass 21 which encloses and encloses the taken out solar battery cell 23 is placed in the heating tank 11 and heated by a heat source After immersing and heating in the heating liquid 12, the glass-sealing material laminate 29 is immersed in the heating liquid 12 and is peeled from the cover glass 21 by the peeling means 13 while being heated. (Fig. 2).

  A solar cell module which is a solar cell module to which the method for recovering a plate glass of a solar cell module according to the present invention can be applied and which can be treated by a recovery device for a plate glass of a solar cell module according to the present invention The present invention is not limited to this, but as an example, the cover glass 21, the sealing material 22, and the back sheet 24 are sequentially stacked in order as an outline and integrally bonded through the sealing material 22, and a plurality of solar There is a panel type one having a structure in which the battery cell 23 is enclosed and sealed by the sealing material 22 and the peripheral edge is held by the aluminum frame 25 (FIG. 3).

  The cover glass 21 serves to protect the solar battery cell 23 while providing light transparency. Normally, tempered glass is used as the cover glass 21.

  The sealing material 22 has optical transparency and functions to surround the solar battery cells 23 and to integrally bond the cover glass 21, the solar battery cells 23, and the back sheet in a stacked state. Specifically, for example, a synthetic resin such as ethylene vinyl acetate copolymer (also referred to as “EVA”) is used as the sealing material 22.

  The solar battery cell 23 is an element for realizing photoelectric conversion. The solar battery cell 23 includes single crystal Si, polycrystalline Si, amorphous Si or the like as a silicon (Si) system, and gallium arsenide (GaAs) system, a cadmium tellurium (CdTe) system, or the like as a compound system.

  The back sheet 24 functions to protect the solar cells 23. Specifically, for example, polyethylene terephthalate (also referred to as "PET") or the like is used as the back sheet 24.

  In addition, illustration and description are abbreviate | omitted about the mechanism for outputting electric power, such as a terminal box and a cable.

  As the procedure of the method for recovering the plate glass of the solar cell module according to the present invention, first, as the procedure of the treatment in the recovery device of the plate glass of the solar cell module according to the present invention, The sheet is removed (S1).

  The removal of the aluminum frame 25 and the back sheet 24 is not limited to a specific procedure or method, and may be performed manually or may be performed by a machine or equipment.

  The back sheet 24 can be peeled off by being exposed to a hot air of, for example, about 300 ° C., or by grinding using various grinding machines.

  In addition, a mechanism for outputting power, such as a terminal box or a cable, may be removed manually, as required.

  Two of the sealing material 22 in which the cover glass 21 and the solar battery cell 23 are enclosed and sealed, remaining (in other words, taken out) by removing the aluminum frame 25 and the back sheet 24 from the solar cell module 20 The layered product having a layered structure is referred to as "glass-sealing material laminate 29".

  Next, the glass-sealing material laminate is immersed in the heating liquid (S2).

  A heating liquid 12 is stored in the heating tank 11, and a heat source (not shown) such as a heater for heating the heating liquid 12 is provided.

As the heating liquid 12, one that satisfies at least the following conditions is used.
<Condition 1> It is stored in the heating tank 11 and liquid when immersing the glass-sealing material laminate 29. That is, the freezing point is lower and the boiling point is higher than the temperature of the heating liquid 12 when the glass-sealing material laminate 29 is immersed, which will be described later.
<Condition 2> Do not cause a chemical reaction with the cover glass 21 or the sealing material 22. Specifically, pH must be neutral.

  Specifically, for example, silicone oil, engine oil, edible oil such as rapeseed oil and salad oil, and glycol such as ethylene glycol are used as the heating liquid 12 specifically.

  The temperature of the heating liquid 12 is adjusted by the heat source provided in the heating tank 11.

  The temperature of the heating liquid 12 is not limited to a specific temperature, and the temperature (preferably, the melting point or more of the sealing material 22 of the glass-sealing material laminate 29 immersed in the heating liquid 12) It is sufficient if the temperature exceeds the melting point, and specifically, the temperature is appropriately set, for example, in the range of about 90 to 400.degree.

  According to the inventor's knowledge, the cover glass 21 and the sealing material 22 can be favorably separated when the temperature of the heating liquid 12 is in the range of about 95 to 200 ° C., and in particular, the amount of energy input is reduced. From the viewpoint, it is preferable that the temperature of the heating liquid 12 be set in the range of about 95 to 150 ° C.

  Here, the temperature of the heating solution 12 does not affect the properties of the cover glass 21 of the glass / capsule laminate 29 immersed in the heating solution 12 (in other words, the properties are changed) Can not be set). In addition, since a tempered glass is usually used as the cover glass 21, even if it heats, for example to about 400 degreeC, the property of the cover glass 21 does not change.

  On the other hand, since the melting point of, for example, ethylene vinyl acetate copolymer (EVA) used as the sealing material 22 is 100 ° C. or less, the sealing material 22 loosens when heated to a temperature of 90 ° C. or 95 ° C. or more As a result, the adhesion with the cover glass 21 is weakened.

  The time during which the glass-sealing material laminate 29 is immersed in the heating liquid 12 is not limited to a specific time, and the glass-sealing material lamination 29 immersed in the heating liquid 12 It is sufficient if the time required for the sealing material 22 to reach the melting point or more (preferably, the temperature exceeding the melting point), specifically, for example, in a suitable time within a range of about 1 to 4 hours It is set.

  According to the inventor's knowledge, it is possible to satisfactorily separate the cover glass 21 and the sealing material 22 in the immersion time of the glass / sealing material laminate 29 in a range of about 1 to 2 hours, and in particular, the treatment The immersion time is preferably set to about one hour from the viewpoint of shortening the time and reducing the energy input.

  For example, the glass-sealing material laminate 29 is in the heating liquid 12 in a state where the sealing material 22 is on the upper surface and the cover glass 21 is on the lower surface (in other words, posture) for the convenience of the next processing of S3. Placed on

  Then, the sealing material 22 is softened by heating via the heating liquid 12 in the heating tank 11.

  Next, the sealing material is scraped off from the cover glass of the glass-sealing material laminate (S3).

  In order to prevent the temperature decrease of the sealing material 22 which has been heated and softened in the previous processing of S2, the peeling of the sealing material 22 remains in the state in which the sealing material 22 is immersed in the heating liquid 12 (Ie, while continuing to heat the sealing material 22).

  The immersion and scraping of the sealing material 22 may be performed in the same place in the heating tank 11 or in different places, and the sealing material 22 may be a heating tank. It may be made to be immersed or scraped while moving inside 11.

  Further, the temperature of the heating liquid 12 in the process of S2 (that is, the temperature of the heating liquid 12 when the sealing material 22 is heated) and the temperature of the heating liquid 12 in the process of S3 (that is, the sealing material 22) The temperature of the heating liquid 12 when scraping off may be the same or different. Specifically, for example, the temperature of the heating liquid 12 in the process of S3 may be set to a range of about 95 to 105 ° C.

  Since the sealing material 22 is loosened and softened by being heated, and the adhesion to the cover glass 21 is weakened, the work such as scratching (in other words, peeling off, scraping off) The treatment is relatively easy to remove. The sealing material 22 peels off naturally when it is heated to, for example, about 90 to 400 ° C. equivalent to the heating liquid 12 and placed in the heating liquid 12 of the heating tank 11. There is no problem and it is attached to the surface of the cover glass 21 continuously.

  At this time, the force to be applied to remove (separate, scrape off) the sealing material 22 does not have to be so strong, and since the cover glass 21 has high hardness, the sealing material 22 is removed. The cover glass 21 will not be damaged / damaged by the scraping process. In other words, as an effect after the process of S2, the sealing material 22 can be sufficiently scraped off the cover glass 21 with a force that does not cause the cover glass 21 to be damaged.

  The scraping means 13 for scraping off the sealing material 22 from the cover glass 21 is not limited to a specific tool or mechanism, and the sealing material 22 attached to the surface of the cover glass 21 may be ground, An appropriate device or mechanism to be removed by peeling or rubbing is appropriately selected.

  As the scraping means 13, for example, a scraper, a polisher, a rubbing roll, etc. may be used, as an example.

  Specifically, the scraper as the scraping means 13 has, for example, a blade portion made of resin, and the blade portion is pressed against the sealing material 22 side of the glass / sealing material laminate 29 and the sealing material 22 is obtained. What can be used is

  Specifically, the polisher as the scraping means 13 includes, for example, a disk-shaped rotating body, and a brush, a buff, a cloth, or a skin attached to a circular flat portion of the rotating body, A material is used that is pressed against the sealing material 22 side of the glass / sealing material laminate 29 while peeling off the sealing material 22 (in other words, scraping) while rotating in a plane centering on the center position of the flat portion. obtain.

  Further, as the rubbing roll as the scraping means 13, specifically, for example, a rod-like or cylindrical rotating body, and a brush, buff, cloth or skin wound around and wound around the outer peripheral surface of the rotating body While being axially rotated about the axial center position of the rotating body, it is pressed against the sealing material 22 side of the glass / sealing material laminate 29 to peel off the sealing material 22 (in other words, rubbing) Take) can be used (see FIG. 2 as an example).

  A plurality of mechanisms or mechanisms may be combined and used as the scraping means 13. Specifically, for example, after scraping with a scraper is performed, peeling by a polisher or a rubbing roll is performed. A process of taking (in other words, scraping) may be performed.

  The cover glass 21 removed from the heating tank 11 is dried after being further cleaned by using, for example, a washing liquid / cleaning agent with water, if necessary (S4).

  As a result, the sealing material 22 is separated and removed from the cover glass 21 together with the solar battery cells 23, and an intact and unclean sheet glass in which no dirt such as the sealing material 22 adheres to the surface is recovered.

  According to the method of recovering the plate glass of the solar cell module and the recovery device of the plate glass of the solar cell module configured as described above, the glass / encapsulant laminate 29 which is a laminate of the encapsulant 22 and the cover glass 21 Since the sealing material 22 is scraped off while being immersed in the heating liquid 12 and heated, the sealing material 22 is completely and completely removed from the cover glass 21 by a simple process and mechanism. Can. Thus, the processing cost can be reduced. In addition, the cover glass 21 can be separated and collected as it is as a intact, non-abrasive plate glass without any dirt or dust such as the sealing material 22 adhering to the surface without breakage or destruction. Therefore, it is possible to separate and collect only the cover glass 21 in a manner that can be reused, and it is possible to separate and collect only the cover glass 21 while preserving and maintaining the original value as a member. Therefore, it is possible to enhance the practical effect and improve the utility as a recycling / reusing method of the solar cell module.

  The above-described embodiment is an example of the preferred embodiment for carrying out the present invention, but the embodiment of the present invention is not limited to the above-described one, and the present invention may be embodied within the scope of the present invention. The invention can be implemented in various ways.

  For example, in the above-described embodiment, the solar cell module 20 having the cross section shown in FIG. 3 is mentioned as an outline of the structure of the solar cell module to which the present invention can be applied. The present invention is not limited to the above-described embodiment, and any structure may be used as long as it has a laminate of a sealing material that encloses and encloses a solar battery cell and a cover glass.

DESCRIPTION OF SYMBOLS 10 Collection device of plate glass of solar cell module 11 heating tank 12 heating liquid 13 scraping means 20 solar battery module 21 cover glass 22 sealing material 23 solar battery cell 24 back sheet 25 aluminum frame 29 glass-sealing material laminate

Claims (8)

  The laminated body of the sealing material and cover glass which encloses and encloses the photovoltaic cell taken out from the solar cell module is immersed in the heating liquid and heated, and then the laminated body is the heating liquid A method of recovering a plate glass of a solar cell module, characterized in that the sealing material is scraped off from the cover glass while being immersed and warmed therein.   The method according to claim 1, wherein the heating liquid is at least one of silicone oil and engine oil.   The temperature of the said heating liquid is adjusted by 90-400 degreeC, The collection | recovery method of the plate glass of the solar cell module of Claim 1 characterized by the above-mentioned.   The method according to claim 1, wherein at least one of a scraper, a polisher, and an abrasive roll is used to scrape the sealing material from the cover glass.   The laminated body of a sealing material and a cover glass which encloses and encloses a solar cell taken out from a solar cell module and which has a heating tank equipped with a heat source and equipped with a heat source and a heat source and which is provided with a heat source The cover is placed in a hot bath, immersed in the heating solution heated by the heat source and heated, and then the laminate is immersed in the heating solution and heated while being heated, the cover is removed by the scraping means. What is claimed is: 1. A plate glass recovery device for a solar cell module, comprising scraping the sealing material from glass.   The apparatus for collecting plate glass of a solar cell module according to claim 5, wherein the heating liquid is at least one of silicon oil and engine oil.   The temperature of the said heating liquid is adjusted by 90-400 degreeC, The collection | recovery apparatus of the plate glass of the solar cell module of Claim 5 characterized by the above-mentioned.   6. The apparatus according to claim 5, wherein the scraping means is at least one of a scraper, a polisher, and an abrasion roll.