Degumming and cleaning device for recycling retired photovoltaic module

Abstract

The utility model relates to the technical field of photovoltaic module recycling, in particular to a degumming and cleaning device for recycling retired photovoltaic modules, which comprises a main body, a screening cylinder is rotatably arranged in the main body, and the bottom of the screening cylinder is soaked in liquid. A feeding hopper and a discharging hopper for silicon fragments to enter and exit are arranged at the two ends, corresponding to the two ends of the screening barrel, of the main body respectively, the bottom of the main body is connected with a glue outlet, the silicon fragments enter the screening barrel and are separated from the fragments under continuous rolling and collision, and the glue is discharged from the glue outlet. Compared with a traditional method, the technical scheme is relatively simple in structure and does not depend on a complex and expensive ultrasonic generating device, and the purchasing cost and the manufacturing cost are reduced; meanwhile, through continuous rolling and collision of the silicon fragments in the screening cylinder and water spraying flushing of the nozzles, all the surfaces of the silicon fragments can be cleaned, cleaning dead angles possibly existing like ultrasonic cleaning are avoided, and the thoroughness of cleaning is improved.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic module recycling technology, specifically to a degumming and cleaning device for recycling retired photovoltaic modules. Background Technology

[0002] Currently, when photovoltaic modules reach the end of their service life or are damaged, they are often disassembled, crushed, and screened to obtain metals and silicon for recycling. During actual processing, residual adhesive easily adheres to the surface of the silicon fragments. This adhesive residue can cause the silicon fragments to clump together, hindering subsequent grinding and screening operations. Therefore, the crushed silicon fragments need to undergo degumming and cleaning.

[0003] Patent document CN218963463U discloses a degumming and cleaning device for recycling retired photovoltaic modules, including an ultrasonic cleaner and a cleaning tank. This solution achieves automated ultrasonic immersion, dehydration and draining treatment of silicon fragments by setting a back plate, V-groove and sliding column between the original ultrasonic cleaner and cleaning tank, and setting a stepper motor, vertical rail and slider between the back plate and sliding column.

[0004] The above-mentioned ultrasonic cleaning machines have high procurement or manufacturing costs and high maintenance costs. Although ultrasonic cleaning can generate a strong cavitation effect, there may be some areas in the cleaning tank where ultrasonic waves cannot propagate, resulting in incomplete cleaning. Utility Model Content

[0005] This invention aims to at least partially solve one of the technical problems in related technologies. Therefore, the object of this invention is to provide a degumming and cleaning device for recycling retired photovoltaic modules, achieving degumming and cleaning of photovoltaic module fragments at low cost.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] A degumming and cleaning device for recycling retired photovoltaic modules includes a main body, within which a screening cylinder is rotatably mounted. The bottom of the screening cylinder is immersed in liquid. Feed hoppers and discharge hoppers for silicon fragments are respectively located at both ends of the main body, corresponding to the ends of the screening cylinder. A glue outlet is connected to the bottom of the main body. Silicon fragments enter the screening cylinder and, under continuous tumbling and collision, the glue separates from the fragments, with the glue discharging from the outlet. A nozzle is also installed inside the screening cylinder, continuously spraying water onto the silicon fragments and the bottom of the screening cylinder.

[0008] In some embodiments of this utility model, the main body includes an upper cover and a cleaning chamber that are joined together, and the two are sealed together. The bottom of the cleaning chamber is provided with the glue outlet and support legs.

[0009] In some embodiments of the utility model, the side of upper cover is equipped with a plurality of openings, the opening is rotatably connected with the sealing plate.

[0010] In some embodiments of the utility model, the upper cover top is equipped with motor, the output of motor is connected with transmission wheel, the both ends of screening cylinder are equipped with rotating part, transmission wheel and rotating part are drivenly connected through transmission belt.

[0011] In some embodiments of the utility model, the rotating part includes transition disc, the one side of transition disc is connected with guide pipe towards the feeding hopper or the discharge hopper, the other side of transition disc is equipped with insertion slot, the end of screening cylinder is connected with insertion slot, the ring surface of transition disc is also equipped with ring cutting groove, transmission belt is sleeved in ring cutting groove.

[0012] In some embodiments of the utility model, the end of screening cylinder is equipped with a plurality of clamping grooves at intervals, the inner wall of insertion slot is equipped with clamping block corresponding the position of clamping groove, clamping block is fixed with clamping groove.

[0013] In some embodiments of the utility model, the inner wall of screening cylinder is equipped with spiral guide pipe along its axial direction, the length of spiral guide pipe matches the length of screening cylinder.

[0014] In some embodiments of the utility model, the surface of upper cover is equipped with water tank, water pump, water pipe and mounting bracket, the mounting bracket is '' U '' type structure, one end of mounting bracket is installed on the top of upper cover, the other end of mounting bracket extends to the inside of screening cylinder, the extension direction of water pipe is same with the extension direction of mounting bracket, the input of water pump is connected with water tank, the output of water pump is communicated with the input of water pipe, the output of water pipe is communicated with nozzle.

[0015] The utility model discloses the beneficial effects of:

[0016] Compared with traditional method, the technical scheme is relatively simple, does not depend on complex and expensive ultrasonic wave generating device, reduces procurement cost and manufacturing cost, and simultaneously, through the continuous tumbling and collision of silicon fragments in the screening cylinder and the water washing of nozzle, can clean each surface of silicon fragments, avoids the possible cleaning dead angle of ultrasonic cleaning, and improves the thoroughness of cleaning. DRAWINGS

[0017] The utility model will be further described below in combination with the drawings.

[0018] Figure 1 It is the perspective view of the utility model;

[0019] Figure 2It is the perspective view of the screening cylinder and the rotating part in the utility model;

[0020] Figure 3 It is the perspective view of the inside of the screening cylinder in the utility model;

[0021] Figure 4 It is the perspective view of the rotating part in the utility model Figure 1 ;

[0022] Figure 5 It is the perspective view of the rotating part in the utility model Figure 2 ;

[0023] Figure 6 It is the perspective view of the water tank, water pump, water pipe and nozzle in the utility model.

[0024] In the figure: 1, upper cover; 11, sealing plate; 12, motor; 13, transmission belt; 2, cleaning bin; 21, glue outlet; 22, supporting leg; 3, feeding hopper; 4, discharging hopper; 5, screening cylinder; 51, clamping groove; 6, rotating part; 61, transition disc; 62, ring cutting groove; 63, guide pipe; 64, clamping block; 7, spiral guide pipe; 8, water tank; 81, water pump; 9, water pipe; 91, mounting bracket; 92, nozzle. DETAILED DESCRIPTION

[0025] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0026] As Figure 1 shown, a kind of degumming cleaning device for decommissioned photovoltaic module recycling, including main body, screening cylinder 5 is rotationally arranged in main body, screening cylinder 5 bottom is soaked in liquid, the both ends of main body correspond to the both ends of screening cylinder 5 are respectively provided with feeding hopper 3 and discharging hopper 4 for the silicon chip in and out, the bottom of main body is connected with glue outlet 21, silicon chip enters screening cylinder 5 and is separated from chip under the continuous tumbling and collision, glue is discharged from glue outlet 21;Screening cylinder 5 inside is also provided with nozzle 92, nozzle 92 continuously sprays water to silicon chip and the bottom of screening cylinder 5.

[0027] During operation, the silicon fragments enter the screening cylinder 5 from the feed hopper 3. The bottom of the screening cylinder 5 is immersed in a liquid (which can be water or other cleaning solution). As the screening cylinder 5 rotates, the silicon fragments continuously tumble and collide within it, causing the adhesive to separate from the silicon fragments. The separated adhesive passes through the sieve holes at the bottom of the screening cylinder 5 and is discharged from the adhesive outlet 21. Simultaneously, the nozzle 92 continuously sprays water onto the silicon fragments and the bottom of the screening cylinder 5 to further rinse the adhesive off the surface of the silicon fragments, assisting in the degumming and cleaning process.

[0028] During the continuous rotation of the screening cylinder 5, the objects inside (including glue and silicon fragments) are subjected to centrifugal force and gravity. The direction of centrifugal force is away from the center of rotation, while the direction of gravity is vertically downward. For the glue, after it separates from the silicon fragments, under the combined action of centrifugal force and gravity, there will be a resultant force diagonally downward. If the position and angle of the screening cylinder 5 are appropriate, this resultant force will cause the glue to move towards the bottom of the screening cylinder 5, eventually passing through the sieve holes on the surface of the screening cylinder 5 and falling downward. The water inside the screening cylinder 5 is in a flowing state. When the glue separates from the silicon fragments, the flow of water will generate a certain pushing force on the glue. The water flow formed during the rotation of the screening cylinder 5 can bring the glue to the vicinity of the sieve holes, and the water flow will generate a certain suction force when passing through the sieve holes, helping the glue to pass through the sieve holes and fall downward.

[0029] It is important to note that as the screening cylinder 5 rotates continuously, the silicon fragments tumble, rub against each other, and collide within it. This mechanical action breaks down the adhesion between the adhesive and the silicon fragments, causing some of the adhesive to detach from the fragments. Simultaneously, since the bottom of the screening cylinder 5 is immersed in water, the water acts as a lubricant and buffer, reducing wear on the silicon fragments. The water also carries away any detached adhesive, preventing it from re-adhering to the fragments. Furthermore, as the screening cylinder 5 rotates, the portion immersed in water creates a flow, resulting in a scouring effect on the silicon fragments. This scouring further helps remove any loosened adhesive from the surface of the silicon fragments, enhancing the degumming effect.

[0030] In addition, a heating element can be installed inside the main body. This element can raise the temperature of the water, which in turn reduces the viscosity of the adhesive. Lower viscosity increases the adhesive's fluidity, weakens its adhesion to the silicone fragments, and makes it easier to detach from them. For example, some common adhesives soften and thin when heated, making them easier to separate from other objects.

[0031] like Figure 1 As shown, in some embodiments of this utility model, the main body includes an upper cover 1 and a cleaning chamber 2 that are joined together, and the two are sealed together. The bottom of the cleaning chamber 2 is provided with an adhesive outlet 21 and a support leg 22. The support leg 22 provides a structural basis for the stability of the device, and the adhesive outlet 21 is used to discharge the adhesive.

[0032] As Figure 1 shown, in some embodiments of the utility model, the side of upper cover 1 is equipped with multiple openings, the opening is rotationally connected with sealing plate 11. After opening sealing plate 11, the inside photovoltaic module fragment of screening cylinder 5 can be directly observed through the opening, and the running state of the equipment is observed. The operator can find out whether the fragment is blocked, whether the stirring is uniform, whether the glue is separated effectively and other problems in time, and adjust the running parameters of the equipment according to the observation results, such as the rotating speed of screening cylinder 5. Moreover, some auxiliary materials can be added to promote the separation of glue during the degumming process, such as cleaning agent, solvent, etc. These auxiliary materials can be conveniently added to the inside of screening cylinder 5 through the opening, ensuring that they are uniformly distributed in the fragments, and improving the degumming effect.

[0033] As Figure 1 , Figure 2 shown, in some embodiments of the utility model, the top of upper cover 1 is equipped with motor 12, the output end of motor 12 is connected with transmission wheel, both ends of screening cylinder 5 are provided with rotating part 6, and transmission wheel and rotating part 6 are transmissionally connected through transmission belt 13. Motor 12 provides power, and the power is transmitted to the rotating part 6 at both ends of screening cylinder 5 through transmission wheel and transmission belt 13, so that the rotation of screening cylinder 5 is realized, and it is the power source for the continuous work of screening cylinder 5.

[0034] As Figure 4 , Figure 5 shown, in some embodiments of the utility model, rotating part 6 includes transition disc 61, one side of transition disc 61 is connected with guide pipe 63 for guiding the entry and exit of silicon fragments, and the other side of transition disc 61 is equipped with insertion slot. The end of screening cylinder 5 is fixedly connected with the insertion slot, so that transition disc 61 and screening cylinder 5 are connected together. The annular surface of transition disc 61 is also equipped with annular cutting groove 62, the inner wall of annular cutting groove 62 is also formed with anti-skid tooth, transmission belt 13 is sleeved in annular cutting groove 62, and rotating part 6 and screening cylinder 5 are driven to rotate stably.

[0035] As Figure 3 , Figure 5 shown, in some embodiments of the utility model, multiple clamping grooves 51 are arranged at the end of screening cylinder 5, clamping blocks 64 are installed on the inner wall of insertion slot corresponding to the position of clamping grooves 51, and clamping blocks 64 are fixedly connected with clamping grooves 51. Through the clamping of clamping grooves 51 and clamping blocks 64, screening cylinder 5 and rotating part 6 are more firmly connected, and the stability of screening cylinder 5 in the rotating process is ensured.

[0036] As Figure 3As shown, in some embodiments of this invention, a spiral guide tube 7 is installed along the axial direction on the inner wall of the screening cylinder 5, and the length of the spiral guide tube 7 matches the length of the screening cylinder 5. The spiral guide tube 7 guides the silicon fragments along a spiral path within the screening cylinder 5, thus lengthening the movement path of the silicon fragments and increasing their residence time. A longer residence time means that the silicon fragments have more opportunities to come into contact with water, undergoing mechanical friction and water flow scouring, which is beneficial for the separation of the adhesive. In addition, the spiral guide tube 7 also acts as a stirrer during rotation, making the silicon fragments more evenly distributed within the screening cylinder 5, preventing them from piling up, ensuring that each silicon fragment can fully participate in the degumming process, and improving the degumming efficiency.

[0037] like Figure 1 , Figure 6 As shown, in some embodiments of this utility model, the surface of the upper cover 1 is provided with a water tank 8, a water pump 81, a water pipe 9, and a mounting bracket 91. The mounting bracket 91 has a "U"-shaped structure, with one end of the mounting bracket 91 installed on the top of the upper cover 1 and the other end extending into the screening cylinder 5. The extension direction of the water pipe 9 is the same as the extension direction of the mounting bracket 91. The input end of the water pump 81 is connected to the water tank 8, the output end of the water pump 81 is connected to the input end of the water pipe 9, and the output end of the water pipe 9 is connected to the nozzle 92. The water pump 81 draws water from the water tank 8 and delivers it to the nozzle 92 inside the screening cylinder 5 through the water pipe 9. The nozzle 92 continuously sprays water onto the silicon fragments and the bottom of the screening cylinder 5 to further rinse the glue on the surface of the silicon fragments and assist in the degumming and cleaning process. Under the guidance of the spiral guide tube 7, the silicon fragments move along the axial direction of the screening cylinder 5 towards the discharge hopper 4 and are finally discharged from the discharge hopper 4, completing the degumming and cleaning process.

[0038] During the cleaning process described above, the mechanical stirring of the screening cylinder 5 allows the cleaning solution to fully contact the surface of the silicon fragments, generating friction and shear forces that directly act on the adhesive layer, helping to break the bond between the adhesive and the component. Meanwhile, the nozzle 92 sprays the cleaning solution onto the surface of the silicon fragments at a certain pressure and angle, using the impact force of the cleaning solution to wash away the adhesive.

[0039] It is important to note that because the screening cylinder 5 is continuously rotating, the water pipe 9 and mounting bracket 91 must be securely installed, and the flexibility and torsional resistance of the water pipe 9 must be considered. The nozzles 92 should be evenly distributed to ensure coverage of all areas within the screening cylinder 5, avoiding any cleaning dead zones. The number and installation position of the nozzles 92 can be reasonably determined based on the size and shape of the screening cylinder 5. Simultaneously, the spray angle and pressure of the nozzles 92 should be moderate, ensuring cleaning effectiveness without damaging the silica fragments. The optimal spray angle and pressure parameters can be determined through experimentation and adjustment.

[0040] In the description of the specification, the description of the terms "one embodiment", "an example", "a specific example" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the utility model. In the specification, the illustrative description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0041] The above is only an example and description of the utility model, and those skilled in the art can make various modifications or supplements or adopt similar ways to replace the described specific embodiments, as long as it does not deviate from the utility model or exceed the scope defined by the present claims, which shall belong to the protection scope of the utility model.

Claims

1. A degumming cleaning device for decommissioned photovoltaic module recycling, comprising a main body, characterized in that, The main body is provided with a screening cylinder rotating therein, the screening cylinder is immersed in liquid at the bottom, the two ends of the main body correspond to the two ends of the screening cylinder, and a feeding hopper and a discharging hopper for silicon fragments are arranged at the two ends respectively, the bottom of the main body is connected with a glue outlet, silicon fragments enter the screening cylinder and are separated from glue under continuous rolling and collision, and the glue is discharged from the glue outlet; a nozzle is further arranged in the screening cylinder, and the nozzle continuously sprays water to silicon fragments and the bottom of the screening cylinder.

2. The degumming and cleaning device for decommissioned photovoltaic module recycling according to claim 1, characterized in that, The main body comprises an upper cover and a cleaning bin which are clamped together, and the two are sealingly connected, and the bottom of the cleaning bin is provided with the glue outlet and supporting legs.

3. The degumming and cleaning device for decommissioned photovoltaic module recycling according to claim 2, characterized in that, A plurality of openings are formed in the side surface of the upper cover, and a sealing plate is rotatably connected to the openings.

4. The degumming and cleaning device for decommissioned photovoltaic module recycling according to claim 2, characterized in that, A motor is mounted on the top of the upper cover, an output end of the motor is connected with a transmission wheel, and both ends of the screening cylinder are provided with rotating members, and the transmission wheel and the rotating members are drivingly connected through a transmission belt.

5. The degumming and cleaning device for decommissioned photovoltaic module recycling according to claim 4, characterized in that, The rotating member comprises a transition disc, one side of the transition disc is connected with a guide pipe towards the feeding hopper or the discharging hopper, the other side of the transition disc is provided with a slot, the end of the screening cylinder is connected with the slot, and the annular surface of the transition disc is further provided with an annular cutting groove, and the transmission belt is sleeved in the annular cutting groove.

6. The degumming and cleaning device for decommissioned photovoltaic module recycling according to claim 5, characterized in that, A plurality of clamping grooves are formed in the end of the screening cylinder, clamping blocks are mounted on the inner wall of the slot corresponding to the positions of the clamping grooves, and the clamping blocks are clamped and fixed with the clamping grooves.

7. The degreasing and cleaning device for decommissioned photovoltaic module recycling according to claim 1, characterized in that, A spiral guide pipe is mounted on the inner wall of the screening cylinder along the axial direction, and the length of the spiral guide pipe matches the length of the screening cylinder.

8. The degumming and cleaning device for decommissioned photovoltaic module recycling according to claim 2, characterized in that, A water tank, a water pump, a water pipe and a mounting bracket are arranged on the surface of the upper cover, the mounting bracket is in a "U" type structure, one end of the mounting bracket is mounted on the top of the upper cover, the other end of the mounting bracket extends into the screening cylinder, the extension direction of the water pipe is the same as the extension direction of the mounting bracket, the input end of the water pump is connected with the water tank, the output end of the water pump is in communication with the input end of the water pipe, and the output end of the water pipe is in communication with the nozzle.

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