Waste crystalline silicon photovoltaic module purification auxiliary device

Abstract

The utility model relates to a waste crystalline silicon photovoltaic module purification auxiliary device, which comprises a box body, the box body comprises a cavity enclosed by side walls and a bottom wall, a plurality of side surface barrier strips are respectively arranged on the opposite side walls in parallel, a plurality of bottom surface barrier strips are arranged on the bottom wall in parallel, and the bottom surface barrier strips are arranged on the bottom wall in parallel. A battery piece in the waste crystalline silicon photovoltaic module is placed in a space defined by the side face barrier strip, the bottom face barrier strip and the wall face. Compared with the prior art, the purification efficiency of the battery piece in the waste crystalline silicon photovoltaic module is improved, and the completeness of the battery piece is effectively ensured in the purification process.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the waste old crystalline silicon cell purification technical field relates to a kind of waste old crystalline silicon photovoltaic module purification auxiliary device. BACKGROUND

[0002] With the coming of the "retirement period" of photovoltaic module, a large number of crystalline silicon photovoltaic module recycling problems need to be solved. The traditional manual separation recovery directly crushes the crystalline silicon cells in the module for recycling, resulting in low purity, low utilization rate and other conditions. Therefore, how to efficiently purify the cell and make it reusable becomes the focus. Based on this situation, the participation of auxiliary device is needed in the efficient purification process of the cell.

[0003] Patent CN220439559U discloses a kind of cell soaking and cleaning device and cell recycling system, including soaking and cleaning tank, in the soaking and cleaning tank, multiple groups of barriers are arranged along transverse direction, space for accommodating single cell is formed between adjacent two groups of barriers, and each group of barriers is composed of multiple cylinders arranged along vertical direction. But the cylinder barrier used in this patent makes the cells easily touch each other in a large area, overlap and interfere, resulting in incomplete cleaning. Although the concave groove on the bottom wall reduces the risk of touching, it makes the preparation of the device complex, and the side wall, end wall and bottom wall need to be prepared by different processes. When the depth of the bottom wall groove is smaller than the size of the cell, there is still a risk of the cell slipping out of the bottom wall groove during ultrasonic cleaning. When the depth is larger, the exposed area of the cell is reduced, resulting in incomplete cleaning. UTILITY MODEL CONTENT

[0004] The utility model aims to overcome at least one of the defects of the prior art and provide a kind of waste old crystalline silicon photovoltaic module purification auxiliary device. The utility model improves the purification efficiency of the cell in waste old crystalline silicon photovoltaic module and effectively ensures the integrity of the cell during purification.

[0005] The purpose of the utility model can be achieved by the following technical solutions:

[0006] One of the technical solutions of the utility model is to provide a kind of waste old crystalline silicon photovoltaic module purification auxiliary device. The device includes a box body, the box body includes a cavity surrounded by side wall and bottom wall, a plurality of side barriers are respectively arranged in parallel on the opposite side walls, a plurality of bottom barriers are arranged in parallel on the bottom wall, and the space surrounded by the side barriers, bottom barriers and wall is used to place the cell in waste old crystalline silicon photovoltaic module.

[0007] Further, the box body includes a rectangular cuboid cavity surrounded by four side walls and a bottom wall, and a plurality of first side barriers and second side barriers are respectively arranged in parallel on the opposite pair of side walls.

[0008] Further, the height of the blocking strip is 16-24 cm. Since there are many sizes of battery pieces in the market, if the height is less than 16-24 cm, the battery pieces are easy to touch and cannot be completely cleaned. If the height is more than 16-24 cm, it is not convenient to take samples during the cleaning process, and space resources are wasted.

[0009] The thickness of the blocking strip is 0.1-0.3 cm. The blocking strip is mainly used to separate the battery pieces. If the thickness is too large, space resources are wasted.

[0010] Further, in order to make the liquid in the box flow smoothly, the distance between the two sides of the blocking strip and the two sides of the wall of the box is 1-2 cm. If the size is too large, space resources are wasted.

[0011] There are many thicknesses of battery pieces. In order to ensure that 3-5 battery pieces can be placed between each layer and be cleaned completely, the distance between the blocking strips is 0.5-2 cm. If the size is too large, the battery pieces are easy to be tightly attached and cannot be cleaned completely, or the interval is too loose and the battery pieces are easy to be broken during the cleaning process.

[0012] Further, in order to make the liquid in the box flow smoothly and leave a certain gas space, the distance between the two ends of the blocking strip and the two ends of the wall of the box is 3-5 cm. If the size is too large, space resources are wasted.

[0013] As a preferred technical solution, the length of the blocking strip and the length and height of the box are determined by the size of the battery piece. The number of blocking strips and the width of the box are determined by the number of battery pieces placed.

[0014] Further, the top of the box is provided with a cover plate which covers the top opening of the box. The cover plate is opened to place the battery pieces and add the acid-base solution required for the cleaning reaction. The cover plate is closed but not tightly closed to prevent liquid splashing during the reaction and to directly exhaust the gas generated during the reaction in the fume hood by the indoor exhaust system.

[0015] Further, a handle is arranged on the side wall of the box, which assists the carrying device.

[0016] As a preferred technical solution, a fixed shaft is arranged on the side wall of the box. The handle is fixed to the box through the fixed shaft and rotates around the fixed shaft.

[0017] Further, a drainage port is formed in the bottom wall of the box. A plug is installed in the drainage port. The drainage port discharges the waste liquid after the reaction. The plug seals the drainage port during the reaction to prevent liquid leakage.

[0018] Further, in order to discharge the waste liquid better and faster, the diameter of the liquid discharge port is 3-5 cm.

[0019] As a preferred technical solution, the thickness of the liquid discharge port is the same as the thickness of the bottom wall of the box body, the thickness of the plug is slightly smaller than the thickness of the bottom wall of the box body, the bottom surface blocking strip is directly arranged above the liquid discharge port without affecting the arrangement of the liquid discharge port, and the plug also does not affect the flatness of the bottom wall of the box body when the box body is placed in the ultrasonic machine.

[0020] As a preferred technical solution, the material of the components of the device includes polytetrafluoroethylene, polypropylene, titanium alloy or stainless steel 316 type which are resistant to strong acid and strong base.

[0021] Further, the depth of the added liquid for purification is at least half the height of the battery piece, and the liquid surface is flush with the top end of the side blocking strip; if the depth is lower than the half height, the battery piece cannot be completely cleaned, and if the depth is higher than the half height, the liquid is prone to seep out and be wasted.

[0022] One of the technical solutions of the utility model provides a waste crystalline silicon photovoltaic module purification method, which adopts the device to assist waste crystalline silicon photovoltaic module purification, and comprises the following steps:

[0023] The battery piece is placed in the gap between the blocking strips in the box body, and the placed battery piece is isolated under the action of the first side blocking strip, the second side blocking strip and the bottom surface blocking strip;

[0024] Then, acid-base solution required for cleaning reaction is added in the box body;

[0025] Then, the cover plate is covered but not tightly covered, so as to prevent liquid splashing in the reaction process and to directly discharge the gas generated in the fume hood by the indoor exhaust system, and then the device is placed in the ultrasonic machine through the lifting handle, the reaction time and the ultrasonic frequency are set according to requirements;

[0026] After the reaction is completed, the device is taken out from the ultrasonic machine, and the waste liquid is discharged through the liquid discharge port.

[0027] Compared with the prior art, the utility model has the following beneficial effects:

[0028] (1) The utility model adopts the mode that the blocking strips effectively isolate the battery pieces in the waste crystalline silicon photovoltaic module, the battery pieces arranged between the blocking strips in a slanting manner are isolated by the blocking strips and are not easy to touch, the contact area of the acid-base solution required for cleaning reaction and the battery pieces is increased, the purification efficiency of the battery pieces is improved, the integrity of the battery pieces is effectively ensured in the purification process, the repeated use rate of the battery pieces is increased, and the utility model has the application characteristics of high efficiency, simplicity and large scale;

[0029] (2) The utility model discloses simple operation process, and the size is moderate and easy to carry, and the box wall surface style is similar, and easy to produce, and the spacing of the baffle strip is adjustable, and the practicality is strong. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 It is the structure diagram of the waste and old crystalline silicon photovoltaic module purification auxiliary device in the embodiment of the utility model.

[0031] Mark explanation in the drawing:

[0032] 1 - cover plate, 2 - handle, 3 - first side baffle, 4 - box, 5 - bottom baffle, 6 - liquid discharge port, 7 - second side baffle. DETAILED DESCRIPTION

[0033] The utility model will be described in detail in combination with specific embodiments. The embodiment is implemented on the premise of the technical scheme of the utility model, and gives detailed implementation mode and specific operation process, but the protection scope of the utility model is not limited to the following examples.

[0034] In the description of the utility model, it needs to be explained that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawing, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, so it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third" and the like are used to describe common objects, only to indicate different instances of the same object, and do not imply that the objects thus described must be given in a given order, whether in time, space, order or any other way.

[0035] In the description of the utility model, it needs to be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected, it can be mechanical connection, or electrical connection, it can be directly connected, or indirectly connected through an intermediate medium, it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0036] Embodiment:

[0037] A waste and old crystalline silicon photovoltaic module purification auxiliary device, such as Figure 1As shown, including the box 4, the box 4 includes a cavity surrounded by side walls and bottom wall, a plurality of side baffle is respectively arranged in parallel on the opposite side wall, a plurality of bottom baffle 5 is arranged in parallel on the bottom wall, the space surrounded by the side baffle, the bottom baffle 5 and the wall is placed in the battery piece in the waste silicon photovoltaic module;

[0038] The box 4 includes a rectangular cavity surrounded by four side walls and a bottom wall, a plurality of first side baffle 3 and second side baffle 7 are respectively arranged in parallel on the opposite pair of side walls;

[0039] The height of the baffle is 16-24cm, because the size of the battery piece on the market is more, below the size range is easy to touch the battery piece, can't achieve the purpose of completely cleaning the battery piece, higher than the size range can't take sample conveniently in the cleaning process, and will cause the waste of space resources, in the embodiment, preferably 20cm;

[0040] The thickness of the baffle is 0.1-0.3cm, the baffle is mainly for the battery piece, the thickness of the baffle is not too large, otherwise easy to cause the waste of space resources, in the embodiment, preferably 0.2cm;

[0041] In order to make the liquid in the box 4 flow better, the distance between the two sides of the baffle and the wall of the box 4 is 1-2cm, the size is too large, which is easy to cause the waste of space resources, in the embodiment, preferably 1.5cm;

[0042] The thickness of the battery piece is more, in order to ensure that 3-5 battery pieces can be placed between each layer and can be cleaned, the distance between the baffles is 0.5-2cm, if the size exceeds, the battery piece is easy to be closely combined and cannot be cleaned, or the interval is loose and the battery piece is easy to be broken in the cleaning process, in the embodiment, preferably 1cm;

[0043] In order to make the liquid in the box 4 flow better, and leave a certain gas space, the distance between the two ends of the baffle and the wall of the box 4 is 3-5cm, the size is too large, which is easy to cause the waste of space resources, in the embodiment, preferably 4cm;

[0044] The length of the baffle and the length and height of the box 4 are determined by the size of the battery piece, the number of baffles and the width of the box 4 are determined by the number of battery pieces placed, in the embodiment, the number of baffles can be set to 6;

[0045] The top of the box 4 is provided with a cover plate 1, the cover plate 1 covers the top opening of the box 4, opens the cover plate 1 to place the battery piece and adds the acid-base solution required for cleaning reaction, closes but does not close the cover plate 1 tightly, prevents the splashing of liquid in the reaction process, at the same time, the gas generated in the fume hood is directly discharged by the indoor exhaust system;

[0046] A handle 2 is arranged on the side wall of the box 4 to assist in carrying the device;

[0047] A fixing shaft is arranged on the side wall of the box 4, and the handle 2 is fixed to the box 4 through the fixing shaft and can rotate around the fixing shaft;

[0048] A drain port 6 is formed on the bottom wall of the box 4, and a plug is arranged in the drain port 6. The drain port 6 discharges waste liquid after reaction, and the plug seals the drain port 6 during reaction to avoid liquid leakage;

[0049] In order to better and faster discharge the waste liquid, the diameter of the drain port 6 is 3-5 cm, and preferably 4 cm in the embodiment;

[0050] The thickness of the drain port 6 is the same as the thickness of the bottom wall of the box 4, the thickness of the plug is slightly smaller than the thickness of the bottom wall of the box 4, and the bottom surface blocking strip 5 is directly arranged above the drain port 6 without affecting the arrangement of the drain port 6, and the plug also does not affect the flatness of the bottom wall of the box 4 when placed in the ultrasonic machine;

[0051] The components of the device are made of polytetrafluoroethylene, polypropylene, titanium alloy or stainless steel 316 type material resistant to strong acid and strong base, and polytetrafluoroethylene is preferred in the embodiment.

[0052] A waste and old crystalline silicon photovoltaic module purification method, which adopts the above device to assist in purifying the waste and old crystalline silicon photovoltaic module, and the specific steps are as follows:

[0053] During operation, the cell piece is placed in the gap of the blocking strip in the box 4, and the cell piece is isolated under the action of the first side blocking strip 3, the second side blocking strip 7 and the bottom surface blocking strip 5;

[0054] Then, the acid and alkali solution required for cleaning reaction is added in the box 4, 5M nitric acid solution or 3M sodium hydroxide solution is selected in the embodiment, and the depth of the added solution is at least half the height of the cell piece, and the liquid surface is at most flush with the top end of the side blocking strip. If the depth is lower than the depth, the cell piece cannot be completely cleaned, and if the depth is higher than the depth, the liquid is easy to seep out and be wasted. In the embodiment, the height of the cell piece is preferably two-thirds of the height of the cell piece;

[0055] Then, the cover plate 1 is covered but not tightly covered to prevent liquid splashing during reaction, and the gas generated during reaction is directly discharged by the indoor exhaust system in the fume hood, and then the device is placed in the ultrasonic machine through the handle 2. The reaction time, ultrasonic frequency and the like are set according to the requirements. In the embodiment, 30 min and 40 kHz are preferred;

[0056] After the reaction is completed, the device is taken out of the ultrasonic machine, and the waste liquid is discharged through the drain port 6.

[0057] The silicon wafer obtained through the above-mentioned device assisted reaction can reach 99% purity and 94% recovery rate under the test of inductively coupled plasma spectrometer (ICP) in 5M nitric acid solution or 3M sodium hydroxide solution.

[0058] The battery piece in the waste and old crystalline silicon photovoltaic module is separated in the cleaning reaction process, the purification efficiency of the battery piece is effectively improved, the integrity of the battery piece is guaranteed, and the utilization rate of the battery piece is improved.

[0059] The above description of the embodiments is for facilitating the ordinary skilled person in the art to understand and use the utility model. The person skilled in the art can obviously easily make various modifications to the embodiments, and apply the general principles described herein to other embodiments without creative labor. Therefore, the utility model is not limited to the above-mentioned embodiments, and the improvements and modifications made by the person skilled in the art according to the disclosure of the utility model without departing from the scope of the utility model should be within the protection scope of the utility model.

Claims

1. A kind of old and worn-out crystalline silicon photovoltaic module purification auxiliary device, it is characterized in that, The device comprises a box (4) which comprises a cavity surrounded by side walls and a bottom wall, a plurality of side blocking strips are arranged in parallel on the opposite side walls respectively, a plurality of bottom blocking strips (5) are arranged in parallel on the bottom wall, and the space surrounded by the side blocking strips, the bottom blocking strips (5) and the wall surface is used for placing the cell pieces in the waste crystalline silicon photovoltaic module; The height of the blocking strips is 16-24 cm; The distance between the blocking strips is 0.5-2 cm.

2. The auxiliary device for purifying waste and old crystalline silicon photovoltaic modules according to claim 1, characterized in that, The box (4) comprises a cuboid cavity surrounded by four side walls and a bottom wall, and a plurality of first side blocking strips (3) and second side blocking strips (7) are arranged in parallel on the opposite side walls respectively.

3. The auxiliary device for purifying waste and old crystalline silicon photovoltaic modules according to claim 1, characterized in that, The thickness of the blocking strips is 0.1-0.3 cm.

4. The auxiliary device for purifying waste and old crystalline silicon photovoltaic modules according to claim 1, characterized in that, The distance between the two sides of the blocking strips and the wall surface of the box (4) is 1-2 cm.

5. The auxiliary device for purifying waste and old crystalline silicon photovoltaic modules according to claim 1, characterized in that, The distance between the two ends of the blocking strips and the wall surface of the box (4) is 3-5 cm.

6. The auxiliary device for purifying waste and old crystalline silicon photovoltaic modules according to claim 1, characterized in that, A cover plate (1) is arranged on the top of the box (4) to cover the top opening of the box (4).

7. The device according to claim 1, wherein the device is characterized by: A handle (2) is arranged on the side wall of the box (4).

8. The device according to claim 1, wherein, A drainage port (6) is arranged on the bottom wall of the box (4), and a plug is arranged in the drainage port (6).

9. The device according to claim 8, wherein the device is characterized by, The diameter of the drainage port (6) is 3-5 cm.

10. The device according to claim 1, wherein the device is characterized by: The depth of the added liquid is at least half the height of the cell pieces, and the liquid surface is flush with the top end of the side blocking strips at most.

Images