High-efficiency sequencing batch decoupling method for EVA adhesive film of crystalline silicon photovoltaic module

Abstract

The present application relates to photovoltaic module resource recycling technical field, disclose a kind of crystalline silicon photovoltaic module EVA adhesive film high-efficiency sequencing decoupling method, this method includes the following steps: after waste crystalline silicon photovoltaic module is mechanically disassembled, into reactor;Into the reactor with acetic acid vapor, after reaction predetermined time, discharge acetic acid solution;Into the reactor with water vapor flushing, remove residual acetic acid solution, discharge flushing liquid;Again into the reactor with N-methyl pyrrolidone vapor, continue to react with the EVA adhesive film in waste crystalline silicon module, reaction set time, discharge N-methyl pyrrolidone solution;Repeat the above steps 2~3 times, until EVA adhesive film is removed, photovoltaic module laminated piece is dissociated;In the present application, acetic acid is prepared by waste vinegar residue, N-methyl pyrrolidone can be recycled, energy consumption and material consumption are far less than prior art, and process is simple, less manual demand, with significant economic benefits.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of photovoltaic module resource recycling, and in particular to a high-efficiency sequencing batch decoupling method for EVA adhesive film of crystalline silicon photovoltaic modules. BACKGROUND

[0002] After more than 20 years of development, China has become the world's largest producer and user of photovoltaic modules. In 2023, China's photovoltaic module production reached 433.1 GW, and in 2024 it will reach 586.8 GW. Crystalline silicon photovoltaic modules are reasonably priced and have good performance, with a market share of over 90%. The theoretical service life of photovoltaic modules is 20-25 years, and by 2030, the global scrap photovoltaic modules are expected to be about 8 million tons, marking the retirement of the first batch of photovoltaic modules.

[0003] Crystalline silicon photovoltaic modules are composed of glass, Ethylene Vinyl Acetate Copolymer (EVA) adhesive film, cell pieces, backsheet, etc. The key to photovoltaic module disassembly and recycling is the separation of EVA adhesive film. EVA is a film product with a thickness of about 0.4 mm, made of ethylene / vinyl acetate copolymer (vinyl acetate content of 30%-33%) as base material, supplemented by several modifiers, and hot-rolled by film forming equipment. Traditional EVA adhesive film separation methods include pyrolysis, chemical solvents, and mechanical methods, etc. The pyrolysis method mainly uses combustion and pyrolysis, which can decompose EVA, but is more polluting and energy-intensive; the chemical solvent method uses acid, alkali or organic solvent to soak the photovoltaic module, thereby changing the organic molecular structure of EVA and separating the photovoltaic module, but requires a long reaction time and consumes a large amount of chemical solvent; the mechanical method mainly uses hot knife lines and spade knives, which are mainly based on physical force, and although EVA can be partially separated, the separation is not complete and the recovery efficiency is affected. SUMMARY

[0004] This section is intended to summarize some aspects of the embodiments of the present application and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract and title of the specification to avoid obscuring the purpose of this section, abstract and title, and such simplifications or omissions cannot be used to limit the scope of the present application.

[0005] In view of the above problems of existing crystalline silicon photovoltaic module EVA adhesive film recycling, such as more pollution, high energy consumption, long processing time, and low recovery efficiency, the present application is proposed.

[0006] To solve the above technical problems, the present application provides the following technical solution: a high-efficiency sequencing batch decoupling method for EVA adhesive film of crystalline silicon photovoltaic modules, which comprises the following steps:

[0007] S1: After the waste and old crystalline silicon photovoltaic module is mechanically disassembled, it is put into a reactor;

[0008] S2: Acetic acid vapor is introduced into the reactor, and after a predetermined reaction time, the acetic acid solution is discharged;

[0009] S3: Water vapor is introduced into the reactor for flushing to remove residual acetic acid solution, and the flushing liquid is discharged;

[0010] S4: N-methyl pyrrolidone vapor is introduced into the reactor again, and continues to react with the EVA adhesive film in the waste and old crystalline silicon module, and after a set reaction time, the N-methyl pyrrolidone solution is discharged;

[0011] S5: Repeat steps 2-3 of S2-S4 until the EVA adhesive film is removed and the photovoltaic module laminates are dissociated.

[0012] As a preferred scheme of the crystalline silicon photovoltaic module EVA adhesive film high-efficiency sequencing decoupling method, wherein: the temperature of the introduced acetic acid vapor is 100-120°, the concentration is 50%-80%, the rate of introduction into the reactor is 2-3 L / min, and the continuous introduction time is 4-8 min; the acetic acid vapor stays in the reactor for not less than 5 min before being discharged.

[0013] As a preferred scheme of the crystalline silicon photovoltaic module EVA adhesive film high-efficiency sequencing decoupling method, wherein: the temperature of the introduced water vapor is above 200°C, the rate of introduction is 3-4 L / min, and the continuous introduction time is 3-5 min.

[0014] As a preferred scheme of the crystalline silicon photovoltaic module EVA adhesive film high-efficiency sequencing decoupling method, wherein: the concentration of the introduced N-methyl pyrrolidone vapor is not less than 90%, the temperature is 190-210°, the rate of introduction is 2-3 / min, and the continuous introduction time is 5-8 min.

[0015] As a preferred scheme of the crystalline silicon photovoltaic module EVA adhesive film high-efficiency sequencing decoupling method, wherein: the acetic acid solution, the flushing liquid and the N-methyl pyrrolidone solution are respectively recovered after being discharged and recycled.

[0016] As a preferred scheme of the crystalline silicon photovoltaic module EVA adhesive film high-efficiency sequencing decoupling method, wherein: the reactor comprises a reaction tank unit, including a tank body, a tank cover arranged at the end of the tank body, and a support frame arranged below the tank body; a reaction frame unit arranged in the inner cavity of the tank body, comprising a containing frame, rotating wheels arranged at both ends of the containing frame in the width direction, and limiting components arranged inside the containing frame and at both ends in the length direction.

[0017] As a preferred scheme of the high-efficiency sequencing batch decoupling method for the EVA adhesive film of the crystalline silicon photovoltaic module, the inner cavity side wall of the tank body is uniformly provided with a ring-shaped guide rail along the axial direction, and the rotating wheel rolls on the ring-shaped guide rail; the inner cavity bottom side wall of the tank body is further provided with a strip-shaped groove, and a discharge valve is arranged in the strip-shaped groove; the inner cavity top side wall of the tank body is further uniformly provided with a steam nozzle; and one end of the inner cavity side wall of the tank body is further provided with a rolling groove.

[0018] As a preferred scheme of the high-efficiency sequencing batch decoupling method for the EVA adhesive film of the crystalline silicon photovoltaic module, the accommodation frame is divided into a frame and a mesh surface arranged on both sides of the frame; the inside of the frame is hollow and penetrates through, a connecting ring is fixed on one end side wall of the frame, the edge of the connecting ring slides in the rolling groove, and the connecting ring is connected with the brake member arranged in the rolling groove in cooperation; and a ring-shaped sliding groove is formed in the side wall of the ring body of the connecting ring.

[0019] As a preferred scheme of the high-efficiency sequencing batch decoupling method for the EVA adhesive film of the crystalline silicon photovoltaic module, the brake member comprises a protective shell, a drive rod rotatably extended from one end of the side wall of the protective shell, a drive sleeve rotatably sleeved on the drive rod, brake arc plates rotatably arranged in the interior of the protective shell and respectively hingedly connected with the side wall of the drive sleeve, and brake arc plates rotatably arranged in the interior of the protective shell and respectively threadedly connected with the side wall of the drive rod; and the side wall of the brake arc plate away from the drive sleeve is in contact with the side wall of the connecting ring.

[0020] As a preferred scheme of the high-efficiency sequencing batch decoupling method for the EVA adhesive film of the crystalline silicon photovoltaic module, the limiting assembly comprises a first type of clamping plate, a second type of clamping plate, a synchronous gear and a deflection member arranged at the end of the two types of clamping plates; the long side of the first type of clamping plate and the long side of the second type of clamping plate slide in parallel in the interior of the frame, the side walls of the short sides of the two types of clamping plates have tooth grooves and are rotatably engaged with the synchronous gear; the deflection member comprises an adjusting ring sliding in the ring-shaped sliding groove, a deflection rod connected to the end of the adjusting ring and the type of clamping plate, and a brake bolt rotatably extended from the side wall of the adjusting ring.

[0021] Compared with the prior art, the present application has the following advantages and beneficial effects:

[0022] 1. Environmental benefits: using acetic acid and N-methyl pyrrolidone as the main reaction raw materials, it is safe and pollution-free, and has obvious environmental benefits;

[0023] 2. Economic benefits: acetic acid is prepared from waste vinegar residue, N-methyl pyrrolidone can be recycled, energy consumption and material consumption are much less than those of the prior art, and the process is simple, labor demand is low, and has significant economic benefits.

[0024] 3. Time efficiency: the application can realize continuous treatment through in-situ sequencing batch reaction device; meanwhile, the gas-solid reaction efficiency is obviously greater than that of liquid-solid reaction, and has better time efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor. Among them:

[0026] Figure 1 It is a whole step schematic diagram of the high-efficiency sequencing batch decoupling method for the EVA adhesive film of the crystalline silicon photovoltaic module.

[0027] Figure 2 It is a reaction mechanism diagram of the high-efficiency sequencing batch decoupling method for the EVA adhesive film of the crystalline silicon photovoltaic module.

[0028] Fig. 3(a)-(b) is a spectral characteristic waveband diagram of unreacted NMP and NMP after cyclic reaction.

[0029] Fig. 4(a)-(b) is a surface micrograph of unreacted EVA and EVA after 150℃ 45min reaction.

[0030] Figure 5 It is a whole structure schematic diagram of the reactor of the high-efficiency sequencing batch decoupling method for the EVA adhesive film of the crystalline silicon photovoltaic module.

[0031] Figure 6 It is a tank body and tank cover structure schematic diagram of the reactor of the high-efficiency sequencing batch decoupling method for the EVA adhesive film of the crystalline silicon photovoltaic module.

[0032] Figure 7 It is an internal cross-sectional structure schematic diagram of the reactor of the high-efficiency sequencing batch decoupling method for the EVA adhesive film of the crystalline silicon photovoltaic module.

[0033] Figure 8 It is a reaction frame unit structure schematic diagram of the high-efficiency sequencing batch decoupling method for the EVA adhesive film of the crystalline silicon photovoltaic module.

[0034] Figure 9 It is a limiting component structure schematic diagram in the reactor of the high-efficiency sequencing batch decoupling method for the EVA adhesive film of the crystalline silicon photovoltaic module.

[0035] Figure 10 It is an axial plane structure schematic diagram of the reactor of the high-efficiency sequencing batch decoupling method for the EVA adhesive film of the crystalline silicon photovoltaic module. DETAILED DESCRIPTION

[0036] In order to make the above objectives, features and advantages of the present application more clear and easily understood, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0037] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, it will be apparent to one skilled in the art that the present application can be practiced without the specific details given herein, that the present application can be practiced with other different systems, and that the present application is not limited to the details given herein.

[0038] Secondly, the "one embodiment" or "embodiment" referred to herein means that the specific features, structures or characteristics can be included in at least one implementation of the present application. "In one embodiment" appearing in different places in the specification does not mean the same embodiment, nor is it an embodiment that is independent or alternative to other embodiments.

[0039] Thirdly, the present application is described in detail in conjunction with the schematic diagram. In the detailed description of the embodiments of the present application, the cross-sectional view of the device structure is locally enlarged without the general proportion for the convenience of description, and the schematic diagram is only an example, which should not limit the scope of protection of the present application herein. In addition, the three-dimensional spatial dimensions of length, width and depth should be included in actual manufacture.

[0040] Embodiment 1

[0041] Reference Figure 1 ~4, the first embodiment of the present application provides a high-efficiency sequencing batch decoupling method for EVA adhesive film of crystalline silicon photovoltaic module, which comprises the following steps:

[0042] S1: after the waste crystalline silicon photovoltaic module is mechanically disassembled, it is placed in the reactor F; specifically, after the recovered waste silicon photovoltaic module is mechanically dismounted from the outer frame and the junction box, it is sequentially placed into the interior of the reactor F from the placing opening of the reactor F, and the reactor F is closed to make it in the state of waiting for reaction.

[0043] S2: acetic acid vapor is introduced into the reactor F, and after the reaction is scheduled for a certain time, the acetic acid solution is discharged;

[0044] Specifically, the temperature of the introduced acetic acid vapor is 100-120℃, preferably 118℃, the concentration is 50-80%, the rate of introduction into the reactor F is 2-3L / min, and the continuous introduction time is 4-8min; the acetic acid vapor stays in the reactor F for not less than 5min before being discharged. The discharged acetic acid solution is recycled through the valve provided on the reactor F for subsequent recycling.

[0045] S3: water vapor is introduced into the reactor F to flush away the residual acetic acid solution, and the flushing liquid is discharged;

[0046] After the acetic acid solution is discharged, water vapor at a temperature of 200°C or higher is introduced into the reactor F at a rate of 3-4 L / min, and the introduction is continued for 3-5 min. The flushing liquid after discharge is also recovered and can be recycled.

[0047] S4: N-methyl pyrrolidone vapor is introduced into the reactor F again to react with the EVA adhesive film in the waste and old crystalline silicon module, and after a set reaction time, the N-methyl pyrrolidone solution is discharged;

[0048] The concentration of the introduced N-methyl pyrrolidone vapor is not less than 90%, the temperature is in the range of 190°-210°, preferably 200°C, the introduction rate is 2-3 L / min, and the continuous introduction time is 5-8 min. After the reaction is completed, the N-methyl pyrrolidone solution discharged is recovered through the valve provided on the reactor F, and after filtration treatment, the reaction liquid can be recycled, thereby greatly reducing the cost.

[0049] S5: Steps 2-3 of S2-S4 are repeated 2-3 times until the EVA adhesive film is removed and the photovoltaic module laminates are dissociated.

[0050] Specifically, since the main material of the EVA adhesive film is derived from ethylene and vinyl acetate, in this method, the polar acetic acid ion is first reacted with the polar group and the vinyl acetate group in the EVA adhesive film, the structure of the EVA adhesive film is destroyed, and the surface roughness of the EVA adhesive film is increased; then a new green solvent NMP (N-methyl pyrrolidone) is used to react with the EVA adhesive film, and the functional group carbonyl on the NMP is used to decouple the EVA adhesive film; the main reaction mechanism is shown in the accompanying Figure 2 More preferably, the reaction of the new green solvent NMP with the EVA adhesive film can be recycled, as shown in the accompanying Figure 3(a) and 3(b) It can be seen that the characteristic wave band and peak value in the NMP absorption spectrum at different cycle times are basically unchanged, i.e., the NMP property is stable and unchanged. Further, as shown in the accompanying Figure 4(a) and 4(b) It can be seen that the unreacted EVA structure is compact, smooth and without damage, while the EVA treated by NMP has a porous structure and a rough surface, which shows that the NMP treatment changes the surface structure of the EVA, thereby facilitating the dissociation between the photovoltaic module laminates.

[0051] Further, in this method, steam reaction is used, which can increase the reaction temperature and facilitate the reaction, and gas-solid reaction is better than liquid-solid reaction, which can accelerate the mass transfer efficiency and improve the overall reaction rate.

[0052] Embodiment 2

[0053] Referring to Figures 5 to 10 For the second embodiment of the present application, which is different from the first embodiment, the reactor F used in the above method comprises a reaction tank unit 100 and a reaction frame unit 200, wherein the reaction tank unit 100 is a container required for the reaction, which has an input port and a discharge port for batch feeding of reaction gas into the reactor F and discharging of reaction solution; the reaction frame unit 200 is installed in the inner cavity of the reaction tank unit 100 for placement of the disassembled waste crystalline silicon components.

[0054] Specifically, the reaction tank unit 100 comprises a tank body 101, a tank cover 102 arranged at the end of the tank body 101, and a support frame 103 arranged below the tank body 101; further, the tank body 101 is a cylindrical shape with one end open, and is provided with a tank cover 102 at the tank opening of the tank body 101; a plurality of annular guide rails 101a are uniformly arranged on the inner cavity side wall of the tank body 101 along the axial direction, for installation and state control of the reaction frame unit 200, and the multiple sets of annular guide rails 101a can better ensure the stable rotation of the containing frame 201; the rotating wheels 202 roll on the annular guide rails 101a; a strip-shaped groove 101b is further arranged on the inner cavity bottom side wall of the tank body 101, which is recessed in the side wall of the tank body 101; and a plurality of discharge valves 101c are arranged in the strip-shaped groove 101b for discharging the reaction solution in the tank body 101; a plurality of steam nozzles 101d are further uniformly arranged on the inner cavity top side wall of the tank body 101; the steam nozzles 101d are arranged in multiple sets to ensure that the photovoltaic components in the containing frame 201 can be within the spraying range of the steam nozzles 101d as much as possible; a rolling groove 101e is further arranged at one end of the inner cavity side wall of the tank body 101; the rolling groove 101e is located in the tank body 101 and close to the tank opening, for installation and limiting of the connecting ring 201c.

[0055] Further, the reaction frame unit 200 is arranged in the inner cavity of the tank body 101, which comprises a containing frame 201, rotating wheels 202 arranged at both ends of the containing frame 201 in the width direction, and limiting components 203 arranged inside the containing frame 201 and at both ends in the length direction; wherein the containing frame 201 is used for placement of the waste photovoltaic components, the rotating wheels 202 are used for rotation of the containing frame 201 to adjust the state of the containing frame 201, and the limiting components 203 are used for clamping and placing the waste photovoltaic components inside the containing frame 201 and for maintaining the state of the containing frame 201.

[0056] Specifically, the accommodating frame 201 is divided into a frame 201a and a mesh surface 201b arranged on both sides of the frame 201a; the frame 201a is hollow inside and penetrates through, a connecting ring 201c is fixed on the side wall of one end of the frame 201a, the edge of the connecting ring 201c slides in the rolling groove 101e, and cooperates with the brake 201d arranged in the rolling groove 101e; the side wall of the ring body of the connecting ring 201c is provided with a ring-shaped sliding groove 201c-1.

[0057] Among them, the frame 201a is in the shape of a rectangular parallelepiped, two side faces composed of the long side and the wide side are provided with the mesh surface 201b, and one side of the end part composed of the wide side and the high side penetrates through, for the placement of the waste photovoltaic module. The mesh surface 201b facilitates the steam sprayed by the steam nozzle 101d to act on the photovoltaic module, and after the photovoltaic module laminated piece is dissociated, it can still be in the frame 201a. Further, the connecting ring 201c is fixedly or detachably connected with the frame 201a, for controlling the placement angle of the frame 201a in the tank 101; the connecting ring 201c can rotate in the rolling groove 101e, it should be noted that it can be manually rotated, and also can be actively rotated by adding mechanical equipment. The ring-shaped sliding groove 201c-1 opened on the ring body side wall of the end surface of the connecting ring 201c is used for adjusting the installation of the ring 203d-1, and then controlling the synchronous movement of the two L-shaped clamping plates through the two deflection rods 203d-2.

[0058] Further, the brake 201d includes a protective shell 201d-1, a drive rod 201d-2 rotatably extended at one end from the side wall of the protective shell 201d-1, a drive sleeve 201d-3 rotatably sleeved on the drive rod 201d-2, and a brake arc plate 201d-4 rotatably arranged inside the protective shell 201d-1 and threadedly matched with the side wall of the drive sleeve 201d-3; the side wall of the brake arc plate 201d-4 away from the drive sleeve 201d-3 is in contact with the side wall of the connecting ring 201c.

[0059] The brake 201d is communicated with the rolling groove 101e and can contact with the edge of the ring body of the connecting ring 201c. Specifically, the protective shell 201d-1 extends on the shell side wall of the tank body 101, the driving rod 201d-2 extends at one end outside the protective shell 201d-1 and at the other end inside the protective shell 201d-1, the rod body side wall of the driving rod 201d-2 is provided with external threads, and the driving sleeve 201d-3 is installed on the side wall of the driving rod 201d-2 by threads; and inside the protective shell 201d-1, the eccentric brake arc plate 201d-4 rotating around the hinge point is arranged, the brake arc plate 201d-4 is hinged with the side wall of the driving sleeve 201d-3 and can be deflected; when the other end of the brake arc plate 201d-4 contacts with the side wall of the connecting ring 201c, a lever structure can be realized to provide a brake effect, the driving sleeve 201d-3 is symmetrical on both sides, and has a complementary enhanced brake effect, that is, an interlocking effect; and due to the eccentric arc side wall of the brake arc plate 201d-4, the brake effect can be greatly improved. That is, the frame 201a can be stably fixed at a required placement angle inside the tank body 101.

[0060] The limiting assembly 203 includes a first L-shaped clamping plate 203a, a second L-shaped clamping plate 203b, a synchronous gear 203c and a deflection piece 203d arranged at the end of the two L-shaped clamping plates; the L-shaped long edges of the first L-shaped clamping plate 203a and the second L-shaped clamping plate 203b are parallel and slide in the inside of the frame 201a, the L-shaped short edges of the two have tooth grooves and are all engaged with the synchronous gear 203c to rotate; the deflection piece 203d includes an adjusting ring 203d-1 sliding in the annular sliding groove 201c-1, a deflection rod 203d-2 connected to the adjusting ring 203d-1 and the end of the L-shaped clamping plate, and a brake bolt 203d-3 extending at one end on the side wall of the adjusting ring 203d-1.

[0061] Specifically, the L-shaped long edges of the first L-shaped clamping plate 203a and the second L-shaped clamping plate 203b extend in the hollow cavity of the frame 201a, and the two groups are in a parallel state, and the whole is driven by the deflection piece 203d, and is displaced by the meshing rotation of the synchronous gear 203c to synchronize the displacement, so that the long edge plates of the two L-shaped clamping plates remain in a parallel clamping state. The synchronous gear 203c can be fixed at any fixed position in the tank body 101. Further, the deflection piece 203d is used to control the clamping spacing of the L-shaped clamping plate, so as to adapt to waste photovoltaic modules of different widths. The two deflection rods 203d-2 are mirror-symmetrically installed, one end of each deflection rod is hinged to the inner ring side wall of the adjusting ring 203d-1, and the other end is hinged to the end side wall of the L-shaped clamping plate 203b; when the adjusting ring 203d-1 is rotated, the spacing between the two L-shaped clamping plates 203b can be adjusted by the deflection rod 203d-2. The locking bolt 203d-3 penetrating the side wall of the adjusting ring 203d-1 is used to control the relative locking between the adjusting ring 203d-1 and the connecting ring 201c, so as to keep the spacing between the two L-shaped clamping plates 203b constant.

[0062] In combination with the accompanying drawings Figures 5 to 10 In use, the reactor F is first opened by the tank cover 102, and the waste photovoltaic module is loaded into the frame 201a in the tank body 101. Before loading, the frame 201a needs to be adjusted to the best drop position, and the spacing between the two L-shaped clamping plates 203b in the frame 201a needs to be adjusted to the maximum width, so as to facilitate the placement of the photovoltaic module. Therefore, the drive rod 201d-2 in the locking piece 201d is first adjusted, so that the two locking arc plates 201d-4 are respectively out of contact or have minimum contact with the connecting ring 201c. At this time, the connecting ring 201c can be freely rotated. After the frame 201a is adjusted to the best drop position, the locking piece 201d is reversely adjusted, so that the two locking arc plates 201d-4 are in contact with the edges of the connecting ring 201c again, forming a locking effect. Then, the locking bolt 203d-3 is adjusted again, so that it is released from the contact with the connecting ring 201c. At this time, the adjusting ring 203d-1 can be freely rotated. During the rotation process, the L-shaped long edges of the two L-shaped clamping plates 203b are driven by the deflection rod 203d-2 to move away from each other to the maximum gap in the inner cavity of the frame 201a. Then, the locking bolt 203d-3 is rotated again to lock the position between the connecting ring 201c and the adjusting ring 203d-1. Therefore, the frame 201a will be in the best drop position, and the drop port will be in the maximum spacing.

[0063] Then, the waste photovoltaic module is dropped according to the steps of the method described in Embodiment 1, and the corresponding acetic acid vapor and N-methyl pyrrolidone vapor is introduced.

[0064] It should be noted that the above examples are only used to illustrate the technical solutions of the present application but not limit the present application. Although the present application is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or equivalently replaced, without departing from the spirit and scope of the technical solutions of the present application, which should be covered in the scope of the claims of the present application.

Claims

1. A high-efficiency sequencing batch decoupling method for EVA adhesive film of crystalline silicon photovoltaic modules, characterized by: It comprises the following steps, S1: After the waste and old crystalline silicon photovoltaic module is mechanically disassembled, it is put into a reactor (F); S2: Acetic acid vapor is introduced into the reactor (F), and after a predetermined reaction time, the acetic acid solution is discharged; S3: Water vapor is introduced into the reactor (F) for flushing, the residual acetic acid solution is removed, and the flushing liquid is discharged; S4: N-methyl pyrrolidone vapor is introduced into the reactor (F) again, and the reaction with the EVA adhesive film in the waste and old crystalline silicon photovoltaic module is continued for a set time, and then the N-methyl pyrrolidone solution is discharged; S5: Repeat steps 2-3 of S2-S4 until the EVA adhesive film is removed and the photovoltaic module laminates are separated; The temperature of the introduced acetic acid vapor is 100°-120°, the concentration is 50%-80%, the rate of introduction into the reactor (F) is 2-3 L / min, and the continuous introduction time is 4-8 min; The acetic acid vapor stays in the reactor (F) for not less than 5 min before being discharged.

2. The method according to claim 1, wherein the method is a high-efficiency sequencing batch decoupling method for EVA adhesive film of crystalline silicon photovoltaic module. The temperature of the introduced water vapor is above 200℃, the introduction rate is 3-4 L / min, and the continuous introduction time is 3-5 min.

3. The method according to claim 1, wherein the method is a high-efficiency sequencing batch decoupling method for EVA adhesive film of crystalline silicon photovoltaic modules. The concentration of the introduced N-methyl pyrrolidone vapor is not less than 90%, the temperature is 190°-210°, the introduction rate is 2-3 L / min, and the continuous introduction time is 5-8 min.

4. The high-efficiency sequencing batch decoupling method for the EVA adhesive film of the crystalline silicon photovoltaic module according to any one of claims 1-3, characterized in that: The acetic acid solution, flushing liquid and N-methyl pyrrolidone solution are respectively recovered after being discharged and recycled.

5. The method according to claim 1, wherein the method is a high-efficiency sequencing batch decoupling method for EVA adhesive film of crystalline silicon photovoltaic module. The reactor (F) comprises, a reaction tank unit (100) comprising a tank body (101), a tank cover (102) arranged at the end of the tank body (101), and a support frame (103) arranged below the tank body (101); a reaction frame unit (200) arranged in the inner cavity of the tank body (101), comprising a containing frame (201), rotating wheels (202) arranged at both ends of the containing frame (201) in the width direction, and limiting components (203) arranged inside and at both ends of the containing frame (201) in the length direction.

6. The method according to claim 5, wherein the method is a high-efficiency sequencing batch decoupling method for EVA adhesive film of crystalline silicon photovoltaic module. The inner cavity side wall of the tank body (101) is uniformly provided with annular guide rails (101a) along the axial direction, and the rotating wheels (202) roll on the annular guide rails (101a); The inner cavity bottom side wall of the tank body (101) is also provided with a strip-shaped groove (101b), and a discharge valve (101c) is arranged in the strip-shaped groove (101b); The inner cavity top side wall of the tank body (101) is also uniformly provided with steam nozzles (101d); One end of the inner cavity side wall of the tank body (101) is also provided with a rolling groove (101e).

7. The method according to claim 6, wherein the method is a high-efficiency sequencing batch decoupling method for EVA adhesive film of crystalline silicon photovoltaic module. The containing frame (201) is divided into a frame (201a) and a mesh surface (201b) arranged on both sides of the frame (201a); The inside of the frame (201a) is hollow and penetrates through, a connecting ring (201c) is fixed on one end side wall of the frame (201a) in the length direction, the edge of the connecting ring (201c) slides in the rolling groove (101e), and the connecting ring (201c) is connected in cooperation with a brake (201d) arranged in the rolling groove (101e); The ring body side wall of the connecting ring (201c) is provided with an annular sliding groove (201c-1).

8. The method according to claim 7, wherein the method is a high-efficiency sequencing batch decoupling method for EVA adhesive film of crystalline silicon photovoltaic module. The brake member (201d) comprises a protective shell (201d-1), a drive rod (201d-2) rotatably extended at one end from the side wall of the protective shell (201d-1), a drive sleeve (201d-3) rotatably sleeved on the drive rod (201d-2), and a brake arc plate (201d-4) rotatably arranged in the protective shell (201d-1) and respectively hingedly matched with the side wall of the drive sleeve (201d-3). The side wall of the brake arc plate (201d-4) away from the drive sleeve (201d-3) is in contact with the side wall of the connecting ring (201c).

9. The method according to claim 8, wherein the method is a high-efficiency sequencing batch decoupling method for EVA adhesive film of crystalline silicon photovoltaic module. The limiting assembly (203) comprises a first L-shaped clamping plate (203a), a second L-shaped clamping plate (203b), and a synchronous gear (203c) and a deflection member (203d) respectively arranged at the end of the two L-shaped clamping plates. The L-shaped long edges of the first L-shaped clamping plate (203a) and the second L-shaped clamping plate (203b) are parallelly slid in the interior of the frame (201a), the L-shaped short edges of the two have tooth grooves and are all in meshing rotation with the synchronous gear (203c). The deflection member (203d) comprises an adjusting ring (203d-1) slid in the annular sliding groove (201c-1), a deflection rod (203d-2) connected to the end of the adjusting ring (203d-1) and the end of the first L-shaped clamping plate (203a) and the end of the second L-shaped clamping plate (203b), and a brake bolt (203d-3) rotatably extended at one end from the side wall of the adjusting ring (203d-1).

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