Reutilization system and reutilization method of retired fan blade

Abstract

According to the reutilization system and reutilization method of the retired fan blade, the retired fan blade comprises a retired blade and a plurality of supporting piers arranged in the length direction of the retired blade at intervals, the supporting piers are used for supporting the retired blade, and the retired blade is partially buried in the supporting piers; the retired blade is sleeved with a first hoop and a second hoop, the first hoop is arranged in the area where the supporting pier is located, and the second hoop is arranged in other areas of the retired blade. A plurality of retired blades are arranged in parallel at intervals, a plurality of mounting rails used for mounting photovoltaic modules are erected on the retired blades at intervals, and the length axes of the mounting rails are perpendicular to the length axes of the retired blades; and the mounting rail is fixedly connected with the first hoop or the second hoop outside each retired blade. By means of the method, efficient reutilization of the retired leaves can be achieved.

Description

Technical Field

[0001] This invention belongs to the technical field of solid waste recycling, and specifically relates to a recycling system and method for retired wind turbine blades. Background Technology

[0002] The design life of wind turbines is usually 20-25 years. Data shows that by 2025, the amount of retired wind turbine blades in my country will exceed 5,800 tons, and by 2030, the cumulative scale of retired wind turbines is expected to reach 10 million kilowatts. At that time, the scale of solid waste generated by retired blades will increase significantly.

[0003] Current methods for recycling retired blades mainly focus on the material level, including pyrolysis, chemical methods, landfilling, and mechanical recycling. These methods generally suffer from high energy consumption, secondary pollution, and resource waste. In addition, some attempts have been made to simply cut the blades for use in landscape features, urban furniture, or building maintenance structures; however, these applications fail to fully utilize the excellent load-bearing capacity of blades as large, irregularly shaped structural components, making large-scale, industrialized application difficult.

[0004] Therefore, the main problem in the existing technology is the lack of a technical solution that can systematically and on a large scale utilize the overall structural performance of retired wind turbine blades and transform them into engineering components with practical value. Summary of the Invention

[0005] This invention provides a system and method for reusing retired wind turbine blades to solve the problem of low reuse efficiency of retired wind turbine blades.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: A system for reusing retired wind turbine blades includes retired blades and a plurality of support blocks arranged at intervals along the length of the retired blades, wherein the support blocks are used to support the retired blades and the retired blades are partially buried in the support blocks; The decommissioned blade is provided with a first clamp and a second clamp. The first clamp is located in the area where the support pier is located, and the second clamp is located in other areas of the decommissioned blade. Multiple retired blades are arranged in parallel at intervals, and multiple mounting tracks for installing photovoltaic modules are laid at intervals on the retired blades. The length axis of the mounting tracks is perpendicular to the length axis of the retired blades. The installation track is fixedly connected to the first or second clamp outside each of the retired blades.

[0007] Furthermore, the support pier includes a platform and multiple columns, the platform being used to support the root of the decommissioned blade, and the columns being used to support other sections of the decommissioned blade; A limiting platform is formed on the surface of the pier, and the limiting platform is used to restrict the movement of the decommissioned blade relative to the supporting pier.

[0008] Furthermore, the support pier is pre-embedded with embedded parts, which are connected to the first clamp. The second clamp includes a first half clamp and a second half clamp. The inner wall shape of the first clamp, the first half clamp and the second half clamp matches the outer surface shape of the corresponding decommissioned blade.

[0009] Furthermore, a connecting plate is integrally formed on the top of the first clamp and the second half clamp, and an installation surface is formed on the top of the connecting plate, which is used for fixed connection with the installation rail.

[0010] Furthermore, maintenance channels are provided between the installation tracks used to install the photovoltaic modules; maintenance ladders are also provided on the side walls of the piers, and connecting channels are provided on the surfaces of the decommissioned blades; the maintenance ladders, connecting channels, and maintenance channels are connected.

[0011] Furthermore, the decommissioned blades are arranged at an angle of 15° to 35°, with the blade roots located at the bottom. The spacing between the support blocks is 1 / 5 to 1 / 3 of the blade length.

[0012] Furthermore, near the tip of the decommissioned blade, an auxiliary support is provided between two adjacent decommissioned blades. The auxiliary support is arranged parallel to the axis of the decommissioned blade and is used to support the middle area of ​​the installation track spanning between the decommissioned blades.

[0013] On the other hand, this application also provides a method for reusing retired wind turbine blades, which utilizes the aforementioned retired wind turbine blade reuse system, characterized by comprising the following steps: Step 1: Pour the support piers on the ground. The pouring height of the support piers is determined according to the design installation position of the blades. First, pour the support piers for the first time. Before the first pouring, tie and install the embedded parts. Step 2: After the first set of support piers has been fully poured, hoist the decommissioned blades and add shims on both sides of the decommissioned blades to temporarily fix them in place. Step 3: Perform the second casting of the support pier, so that the lower part of the retired blade is cast inside the support pier; Step 4: After the support pier is poured, install the first clamp on the outside of the decommissioned blade at the top of the support pier, and install the second clamp on the outside of the decommissioned blade according to the installation track laying point. Step 5: Install the track on the decommissioned blade. The track is fixedly connected to the first and second clamps. After the track is installed, lay the photovoltaic modules on the track.

[0014] Furthermore, before hoisting the decommissioned blades in step two, the cracks on the decommissioned blades are repaired, and an inspection channel is formed on the upper surface of the decommissioned blades; When laying photovoltaic modules in step five, the photovoltaic module installation needs to be disconnected on the upper surface of the decommissioned blades to reserve space for maintenance access.

[0015] Furthermore, if the load-bearing capacity of the installation track at the tip of the decommissioned blade is insufficient according to the stress calculation, auxiliary support components should be constructed between the tip sections of adjacent decommissioned blades while constructing the support piers. The auxiliary support includes a truss support and a support crossbar fixed to the truss support, wherein the longitudinal axis of the support crossbar is perpendicular to the laying axis of the installation track.

[0016] The present invention can achieve the following beneficial effects: 1. This application involves arranging multiple support piers at intervals and installing retired blades on these piers. Hoops are then fitted over the retired blades, and an installation track spanning multiple retired blades is constructed. This allows for the installation of photovoltaic modules via the retired blades. The support piers provide stable support for the retired blades, and the installation track, fixedly connected to the first and second hoops, stably supports the photovoltaic modules. This system and method eliminates the need for crushing or recombining retired blades, enabling their large-scale, high-value-added reuse as a support structure for photovoltaic modules. This effectively solves the problem of low resource utilization of retired blades in existing technologies and promotes the development of a circular economy.

[0017] 2. This application sets up a maintenance passage between the two installation rails, a maintenance ladder on the side wall of the pier, and a connecting passage on the surface of the decommissioned blade. The maintenance ladder, the connecting passage, and the maintenance passage are interconnected, forming a convenient maintenance path. This allows staff to quickly reach various areas of the photovoltaic modules and decommissioned blades for maintenance work, greatly reducing the difficulty of maintenance and the risk of operation, and improving the overall system's ease of operation and maintenance.

[0018] 3. This application arranges the retired blades at an angle between 15° and 35°, which enables the photovoltaic modules to obtain a better light-receiving angle and improves the photovoltaic power generation efficiency. At the same time, auxiliary support components are set between the tip sections of adjacent retired blades, which can effectively support the middle area of ​​the spanned installation track, preventing the installation track from deforming due to the large span or after bearing the photovoltaic modules, and further enhancing the structural stability and service life of the entire system. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a top view of the decommissioned wind turbine blade reuse system of the present invention after installation; Figure 2 This is a top view of a retired wind turbine blade reuse system of the present invention before the installation of photovoltaic modules; Figure 3 This is a schematic diagram illustrating the effect of setting auxiliary support components in a decommissioned wind turbine blade reuse system according to the present invention; Figure 4 This is a side view of the decommissioned blades of the present invention after installation. Figure 5 This is a cross-sectional view of the connection between the first clamp and the support pier, used in this invention. Figure 6 This is a cross-sectional view of the present invention used to illustrate the connection between the decommissioned blade and the second clamp; Figure 7 This is a schematic diagram of the structure of the first clamp of the present invention.

[0020] The attached diagram lists the components represented by each number as follows: 1. Decommissioned blade; 2. Support pier; 21. Pier platform; 22. Pier column; 23. Limiting platform; 24. Maintenance ladder; 25. Embedded parts; 3. First clamp; 31. Connecting plate; 4. Second clamp; 41. First half clamp; 42. Second half clamp; 5. Photovoltaic module; 6. Installation track; 7. Maintenance passage; 8. Connecting passage; 9. Auxiliary support components; 91. Truss support pier; 92. Supporting horizontal steel. Detailed Implementation

[0021] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0022] like Figures 1 to 7 As shown, the decommissioned wind turbine blade reuse system provided in this application includes a decommissioned blade 1 and multiple support piers 2 spaced apart along the length of the decommissioned blade 1. The support piers 2 are used to support the decommissioned blade 1. The decommissioned blade 1 is generally inclined at an angle of 15° to 35°, with the blade root located at the bottom. The spacing between the support piers 2 is 1 / 5 to 1 / 3 of the blade length. The support piers 2 are made of cast-in-place concrete or precast concrete components and include abutments 21 and multiple columns 22. The abutments 21 support the root of the decommissioned blade 1, and the columns 22 support other sections of the decommissioned blade 1. A limiting platform 23 is formed on the surface of the abutment 21 to restrict the movement of the decommissioned blade 1 relative to the support piers 2.

[0023] A first clamp 3 is provided in the contact area between the decommissioned blade 1 and each support pier 2. Specifically, the decommissioned blade 1 is partially embedded in the support pier 2, and the first clamp 3 is fitted over the decommissioned blade 1. A second clamp 4 is provided in the area where the decommissioned blade 1 does not contact the support pier 2. The second clamp 4 includes a first half-clamp 41 and a second half-clamp 42, which are fitted over the decommissioned blade 1 and connected and fixed. The inner wall shape of the first clamp 3, the first half-clamp 41, and the second half-clamp 42 matches the outer surface shape of the corresponding decommissioned blade 1. It should be noted that a rubber layer is provided between the first clamp 3 and the second clamp 4 and the decommissioned blade 1. The rubber layer makes it less likely for the first clamp 3 and the decommissioned blade 1, and the second clamp 4 and the decommissioned blade 1 to wear against each other, and allows the decommissioned blade 1 to be installed more securely within the clamp.

[0024] Multiple retired blades 1 are arranged in parallel at intervals. Multiple mounting tracks 6 for installing photovoltaic modules 5 are spaced apart on these retired blades 1. The length axis of the mounting tracks 6 is perpendicular to the length axis of the retired blades 1. Furthermore, a connecting plate 31 is integrally formed on the top of the first clamp 3 and the second half-clamp 42, and the mounting tracks 6 and the connecting plate 31 are connected and fixed using high-strength bolts. The mounting tracks 6 can specifically be purlins, and the mounting tracks 6, the first clamp 3, and the second clamp 4 are all made of metal and have undergone anti-corrosion treatment.

[0025] Because the root of the retired blade 1 is wider than its tip, the spacing on the tip side of the retired blade 1 is relatively large. Since the load-bearing capacity of the tip of the retired blade 1 is lower than that of the root, an auxiliary support 9 is provided if the load-bearing capacity of the middle area of ​​the installation track 6 between two adjacent retired blades 1 is insufficient near the tip. The auxiliary support 9 includes a truss support 91 and a supporting horizontal steel 92 fixed to the truss support 91. The longitudinal axis of the supporting horizontal steel 92 is perpendicular to the laying axis of the installation track 6, and it is used to support the middle area of ​​the installation track 6 spanning between the retired blades 1.

[0026] In addition, a maintenance passage 7 is provided between the two installation tracks 6 used for installing photovoltaic modules 5, and a maintenance ladder 24 is provided on the side wall of the pier 22. A connecting passage 8 is formed on the surface of the decommissioned blade 1. The maintenance ladder 24, the connecting passage 8, and the maintenance passage 7 are connected to form a complete maintenance path. When constructing the maintenance passage 7, two purlins are erected between the two decommissioned blades 1, and wooden planks are laid on the purlins to facilitate worker movement.

[0027] This application also provides a method for reusing retired wind turbine blades, which utilizes the aforementioned retired wind turbine blade reuse system and specifically includes the following steps: Step 1: First, pour the support pier 2 on the ground. The pouring height of the support pier 2 is determined according to the design installation position of the blade. Perform the first pouring of the support pier 2, and bind and install the embedded part 25 inside the support pier 2. The embedded part 25 is specifically used for the pre-embedded anchor bolts for the first clamp 3 connection in the subsequent steps. After the first pouring of the support pier 2 is completed, the embedded part 25 extends out.

[0028] Step 2: After the first support pier 2 is fully poured and reaches the design strength, the decommissioned blade 1 is pre-treated. The pre-treatment includes repairing the cracks on the surface of the decommissioned blade 1, such as filling with epoxy mortar or reinforcing with carbon fiber cloth. At the same time, a connecting channel 8 is formed on the upper surface of the decommissioned blade 1 to prepare for subsequent maintenance and passage.

[0029] Then, the decommissioned blade 1 is hoisted by hoisting equipment, and the root of the decommissioned blade 1 is placed on the limiting platform 23 of the pier 21, so that the other sections of the decommissioned blade 1 are correspondingly erected on each pier column 22. Pad blocks are added on both sides of the decommissioned blade 1 to achieve the initial positioning and support of the decommissioned blade 1.

[0030] Step 3: Construct the second support pier 2. The second pour will enclose the lower half of the decommissioned blade 1 to achieve the fixed installation of the decommissioned blade 1. The concrete pouring can fit the curved outer contour of the decommissioned blade 1, thereby achieving stable support.

[0031] Step 4: After the support pier 2 is poured, install the first clamp 3 on the outside of the decommissioned blade 1 at the top of the support pier 2. Install the second clamp 4 on the outside of the decommissioned blade 1 outside the top of the support pier 2 according to the laying points of the installation track 6. The specific installation position of the second clamp 4 is determined according to the laying points of the installation track 6. Slide the first clamp 3 onto the surface of the decommissioned blade 1 and connect and fix the first clamp 3 to the embedded part 25. Slide the first half clamp 41 and the second half clamp 42 onto the outside of the decommissioned blade 1, so that the inner wall of the second half clamp 42 and the first half clamp 41 are tightly attached to the outer surface of the decommissioned blade 1. Then fix the first half clamp 41 and the second half clamp 42 to the outside of the decommissioned blade 1 with bolts and other fasteners to ensure the clamp's wrapping and fixing effect on the decommissioned blade 1.

[0032] Step 5: Install the track 6 on multiple decommissioned blades 1. During construction, ensure that the length axis of the track 6 is perpendicular to the length axis of the decommissioned blade 1, and fix the track 6 to the upper surface of each decommissioned blade 1. Specifically, fix the track 6 to the first clamp 3 or the second half clamp 42. At the same time, reserve a position for the maintenance passage 7 between the two track 6 used for installing the photovoltaic module 5, ensuring that the maintenance passage 7 is connected to the connecting passage 8 on the decommissioned blade 1 and the maintenance ladder 24 on the side wall of the pier 22.

[0033] After the installation track 6 is completed, the photovoltaic module 5 is laid on the installation track 6. During the laying, the photovoltaic module 5 needs to be laid at the maintenance channel 7 reserved on the upper surface of the retired blade 1 to ensure that the maintenance channel 7 is unobstructed.

[0034] If, during the above-mentioned operations, the load-bearing capacity of the installation track 6 at the tip of the retired blade 1 is insufficient according to the stress calculation, then during the construction of the support pier 2, an auxiliary support 9 can be constructed between the tip sections of adjacent retired blades 1. The auxiliary support 9 must be constructed before the installation track 6 is laid. During the construction of the auxiliary support 9, a steel truss support pier 91 is first erected, and then the supporting horizontal steel 92 is fixed to the truss support pier 91, ensuring that the length axis of the supporting horizontal steel 92 is perpendicular to the laying axis of the installation track 6.

[0035] The above description is only a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A system for recycling decommissioned wind turbine blades, characterized by: The retired blade (1) and a plurality of support piers (2) arranged at intervals along the length direction of the retired blade (1) are included, the support piers (2) are used for supporting the retired blade (1), and the retired blade (1) is partially buried in the support piers (2); The retired blade (1) is provided with a first hoop (3) and a second hoop (4), the first hoop (3) is arranged in the area where the support pier (2) is located, and the second hoop (4) is arranged in other areas of the retired blade (1); A plurality of retired blades (1) are arranged at intervals and in parallel, a plurality of mounting rails (6) for mounting photovoltaic modules (5) are arranged at intervals on the plurality of retired blades (1), and the length axis of the mounting rail (6) is perpendicular to the length axis of the retired blade (1). The mounting rail (6) is fixedly connected with the first hoop (3) or the second hoop (4) outside each retired blade (1).

2. A system for recycling decommissioned fan blades according to claim 1, wherein: The support pier (2) includes a pier table (21) and a plurality of pier columns (22), the pier table (21) is used for supporting the root of the retired blade (1), and the pier column (22) is used for supporting other sections of the retired blade (1); The surface of the pier table (21) forms a limiting table (23) for limiting the movement of the retired blade (1) relative to the support pier (2).

3. A system for recycling decommissioned fan blades according to claim 1, wherein: The support pier (2) is pre-buried with a pre-buried part (25), the pre-buried part (25) is connected with the first hoop (3), the second hoop (4) includes a first half hoop (41) and a second half hoop (42), and the inner walls of the first hoop (3), the first half hoop (41) and the second half hoop (42) are matched with the shape of the outer surface of the corresponding retired blade (1).

4. A system for recycling decommissioned fan blades according to claim 3, wherein: The first hoop (3) and the second half hoop (42) are integrally formed with a connecting plate (31) at the top, and the connecting plate (31) is used for fixedly connecting with the mounting rail (6).

5. A system for recycling decommissioned fan blades according to claim 2, wherein: Maintenance channels (7) are further arranged between the mounting rails (6) for mounting the photovoltaic modules (5); the sidewall of the pier column (22) is also provided with a maintenance climbing ladder (24), and the surface of the retired blade (1) is provided with a connecting channel (8), and the maintenance climbing ladder (24), the connecting channel (8) and the maintenance channel (7) are communicated.

6. A system for recycling decommissioned fan blades according to claim 2, wherein: The retired blade (1) is arranged in an inclined manner, the inclination angle of the retired blade (1) is 15° to 35°, and the root of the blade is located at the bottom; The spacing between the support piers (2) is 1 / 5 to 1 / 3 of the length of the blade.

7. A system for recycling decommissioned fan blades according to claim 1, wherein: An auxiliary support (9) is further arranged between the adjacent two retired blades (1) near one end of the tip of the retired blade (1), the auxiliary support (9) is arranged in parallel with the axis direction of the retired blade (1), and is used for supporting the middle region of the mounting rail (6) which spans between the retired blades (1).

8. A method for recycling a decommissioned wind turbine blade using a system for recycling a decommissioned wind turbine blade according to any one of claims 1-7, characterized in that, The method comprises the following steps: Step one, pouring the support pier (2) on the ground, the pouring height of the support pier (2) is determined according to the designed installation position of the blade, the first support pier (2) is poured first, and the binding and installation of the pre-buried part (25) is performed before the first pouring; Step two, after the first support pier (2) is completely poured, hoist the retired blade (1), and add blocks to temporarily fix the retired blade (1) on both sides of the retired blade (1); Step three, pour the second support pier (2) to make the lower area of the retired blade (1) poured in the support pier (2); Step four, after the support pier (2) is poured, install the first hoop (3) on the top of the support pier (2) outside the retired blade (1), and install the second hoop (4) according to the laying point of the installation track (6) outside the retired blade (1); Step five, install the installation track (6) on the retired blade (1), the installation track (6) is fixedly connected with the first hoop (3) and the second hoop (4), and after the installation track (6) is installed, lay the photovoltaic module (5) on the installation track (6).

9. A method of recycling decommissioned fan blades according to claim 8, wherein: Before the retired blade (1) is hoisted in step two, the retired blade (1) is repaired and a maintenance channel (7) is formed on the upper surface of the retired blade (1); When the photovoltaic module (5) is laid in step five, the photovoltaic module (5) is disconnected on the upper surface of the retired blade (1), and the maintenance channel (7) position is reserved.

10. A method of recycling decommissioned fan blades according to claim 8, wherein: If the load bearing capacity of the installation track (6) at the tip of the retired blade (1) is insufficient according to force calculation, an auxiliary support (9) is constructed between the adjacent tip sections of the retired blade (1) while the support pier (2) is constructed; The auxiliary support (9) comprises a truss support pier (91) and a support cross steel (92) fixed on the truss support pier (91), and the length axis of the support cross steel (92) is perpendicular to the laying axis of the installation track (6).

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