A method for regenerating blades of an H-type vertical axis micro-wind generator from waste wind turbine blades

Abstract

The invention discloses a method for regenerating blades of an H-type vertical axis micro-wind generator from waste wind power blades, which relates to the field of resource recovery and reuse. The waste wind power blades are cut into profiles to manufacture the blades of the H-type vertical axis micro-wind generator. The epoxy resin fiberglass sandwich panel of the waste wind power blade has the characteristics of light weight, high strength and corrosion resistance. The fiberglass sandwich panel of the waste wind power blade is used to replace aluminum alloy to produce the blades of the H-type vertical axis micro-wind generator, so that the waste wind power blades are reused. While ensuring the strength of the blades of the H-type vertical axis micro-wind generator, the weight of the blades of the H-type vertical axis micro-wind generator is reduced, the load of the support structure and the transmission system is alleviated, and the blades of the H-type vertical axis micro-wind generator are easier to start and accelerate at a lower wind speed, so that they can operate in a wider wind speed range; the wind energy capture efficiency is improved, the waste wind power blades obtain a second life, and thus the recycling of resources is realized, promoting sustainable development.

Description

Technical Field

[0001] The present invention relates to the field of recycling of waste wind turbine blades, and specifically to a method for regenerating H-type vertical-axis micro-wind turbine blades from waste wind turbine blades. Background Art

[0002] With the rapid development of the wind power generation industry, a large number of wind turbine blades face the problem of being scrapped after reaching their service life. At present, it is difficult to dispose of the scrapped wind turbine blades, which often causes waste of resources and environmental pollution. These waste wind turbine blades are made of high-performance epoxy resin (epoxy resin is a high-strength and high-performance resin) fiberglass material, and have the characteristics of light weight, high strength, corrosion resistance, and large volume. These waste wind turbine blades are composed of an epoxy fiberglass blade root, a main beam, and an epoxy fiberglass core board accounting for 90%. The epoxy fiberglass core board is composed of an epoxy fiberglass skin and a sandwich board with balsa wood (the epoxy fiberglass sandwich board of balsa wood is about 700 kg / m3) and plastic foam (the epoxy fiberglass sandwich board of plastic foam is about 400 kg / m3) as the sandwich. In order to ensure stable operation and high wind energy utilization rate under high wind speed conditions; the horizontal-axis wind turbine blades are made of high-strength and lightweight epoxy fiberglass and have a complex structure design; in order to achieve high-strength and lightweight performance, they have the advantages of light weight, high strength, corrosion resistance, etc. However, this epoxy fiberglass material has a special material and the disadvantage of being difficult to degrade, which causes great difficulties in the recycling work. It is considered a special material that "does not rot for thousands of years and does not melt for tens of thousands of years" in the industry. At present, a large number of wind turbine blades are facing retirement, and the recycling and reuse of waste wind turbine blades have become a problem.

[0003] Current domestic and international recycling methods for waste wind turbine blades and their existing drawbacks

[0004] First, it wastes high-quality resources. Second, it consumes a large amount of energy during the recycling process. Third, it cannot achieve high-value recycling.

[0005] 1. Mechanical treatment: The blade is cut into small pieces by mechanical force, and then broken into short fibers and powders, which are used as epoxy fiberglass fillers or the fibers are screened out for use as anti-cracking materials for cement components. However, it will generate a large amount of dust and noise, and the treatment efficiency is relatively low.

[0006] Disadvantages: A large amount of dust and noise will be generated during the mechanical treatment process, and the treatment efficiency is relatively low. The recycling cost is high, and resources are wasted.

[0007] 2. Landfill treatment: The retired wind turbine blades are directly landfilled underground. This is the simplest and most crude treatment method, and no materials can be recycled. Moreover, the fiberglass material is difficult to degrade, and in the long run, it may pollute the soil and groundwater.

[0008] Disadvantages: Landfill treatment will lead to waste of land resources, and fiberglass materials are difficult to degrade. In the long run, it may pollute the soil and groundwater and waste resources.

[0009] 3. Chemical dissolution treatment: Use chemical agents to dissolve the epoxy fiberglass materials in the blades in order to recycle useful materials. This method requires the use of a large amount of chemical agents, which may cause secondary pollution to the environment and has high treatment costs.

[0010] Disadvantages: Chemical dissolution treatment requires the use of a large amount of chemical agents, which may cause secondary pollution to the environment, has relatively high treatment costs, is difficult to form large-scale treatment, and wastes resources.

[0011] 4. Incineration treatment: Generate heat energy by incinerating the blades for power generation. This method will produce harmful gases and secondary pollution, and has high requirements for incineration equipment and large treatment costs.

[0012] Disadvantages: Harmful gases and secondary pollution will be generated during incineration treatment, and it has high requirements for incineration equipment, large treatment costs, and wastes resources.

[0013] 5. Pyrolysis treatment: Decompose the blades into gas, liquid and solid forms at high temperature to recycle useful materials. This method requires high temperature and special equipment, has high treatment costs, and may produce harmful gases during the treatment process.

[0014] Disadvantages: Pyrolysis treatment requires high temperature and special equipment, has high treatment costs, and may produce harmful gases during the treatment process, wasting resources.

[0015] 6. Co-processing in cement kilns: Use the blades as fuel or raw materials for cement production to achieve resource utilization and waste resources.

[0016] The current H vertical-axis generator blades are made of aluminum alloy, with high costs, large specific gravity and poor corrosion resistance. Summary of the Invention

[0017] In view of the existing methods for recycling waste wind power blades and their existing disadvantages, in order to solve the problem of recycling and reusing waste wind power blades, the present invention has invented a method for using waste wind power blades to replace aluminum alloy to produce H-type vertical-axis micro wind generator blades.

[0018] Compared with horizontal-axis wind turbines, H-type vertical-axis micro wind turbines have the advantages of simple and compact structure, convenient installation and maintenance, no wind direction limitation, and low noise. In addition, vertical-axis wind turbines are more suitable for use in complex terrains such as cities and mountains, and have relatively low strength requirements. Therefore, converting waste wind turbine blades into H-type vertical-axis micro wind turbine blades, which are light in weight, can not only meet the performance requirements of H-type vertical-axis micro wind turbine blades, but also give the waste wind turbine blades a second life and extend the service life of the blades. Especially in a light wind environment, the vertical-axis generator has higher power generation efficiency and is suitable for areas with low wind speeds. Vertical-axis wind power technology, with its advantages of being insensitive to wind direction changes and low operating noise, is gradually becoming a new favorite in the wind power field. Remanufacturing endows waste wind turbine blades with new value and realizes the sustainable utilization of resources.

[0019] As a clean and sustainable energy form, vertical-axis wind power generation technology mainly relies on vertical-axis wind turbines, which can generate electricity even with a gentle breeze. This technology is particularly suitable for decentralized power generation in cities, rural areas, remote areas, the agricultural sector, households and residences, traffic supervision, telecommunication base stations, toll stations, outdoor lighting, educational institutions, small enterprises, eco-tourism and camping areas, and the market scale is constantly expanding.

[0020] In view of the above problems, the present invention aims to provide an innovative method for recycling waste wind turbine blades. By combining precise cutting, bonding, numerical control gantry milling machine processing, and winding processes on waste wind turbine blades, they are transformed into blades suitable for H-type vertical-axis wind turbines. This method can not only effectively solve the problem of dealing with waste wind turbine blades, but also make full use of their material characteristics, achieve the maximum utilization of resources, reduce costs, reduce carbon emissions, and reduce environmental pollution, meeting the requirements of sustainable development.

[0021] Using epoxy resin fiberglass sandwich panels of waste wind turbine blades instead of aluminum alloy to make H-type vertical-axis micro wind turbine blades reduces the weight and production cost of the blades.

[0022] Most of the waste wind turbine blades are composed of sandwich panels with balsa wood and plastic foam as the core materials and epoxy resin fiberglass materials as the skin. They have the advantages of high strength, light weight (about 700 kg / m3 for balsa wood epoxy resin fiberglass sandwich panels and about 400 kg / m3 for plastic foam epoxy resin fiberglass sandwich panels), and corrosion resistance. By precisely cutting the waste wind turbine blades, profiles that meet the specifications of the H-type vertical axis micro wind turbine blades are obtained. Through bonding, the shape requirements of the blade blanks are achieved. The blanks are processed with a CNC gantry milling machine to meet the shape requirements of the vertical axis micro wind turbine blades. After being strengthened by epoxy resin fiberglass winding, the strength and anti-aging requirements of the blades are met, realizing the high-value reuse of waste wind turbine blades. The aim is to recycle waste wind turbine blades into H-type vertical axis micro wind turbine blades with economic value and environmental benefits in an efficient and environmentally friendly way, thereby realizing the circular utilization of resources, reducing carbon emissions, and promoting sustainable development.

[0023] To achieve the above objectives, the present invention is realized through the following technical solutions: A method for regenerating H-type vertical axis micro wind turbine blades from waste wind turbine blades, comprising the following steps:

[0024] Separate the epoxy resin fiberglass sandwich panels of the waste wind turbine blades from the blade main beam and the blade root with special cutting equipment, and cut the epoxy resin fiberglass sandwich panels into profiles required for H-type vertical axis micro wind turbine blades; Assemble and bond the epoxy resin fiberglass sandwich panel profiles into the shape blank of the H-type vertical axis micro wind turbine blades; Use a CNC gantry milling machine to process the epoxy resin fiberglass sandwich panel blank into the shape of the H-type vertical axis micro wind turbine blades that can efficiently capture wind energy; Install nut embedded parts and plugs, then wind a layer of high-performance and corrosion-resistant epoxy resin fiberglass material skin, and then perform surface polishing treatment to enhance the strength, corrosion resistance, and anti-ultraviolet performance of the H-type vertical axis micro wind turbine blades.

[0025] (a) Determine the cutting plan according to the specifications and shape requirements of the H-type vertical axis micro wind turbine blades and the shape of the epoxy resin fiberglass sandwich panels of the waste wind turbine blades;

[0026] (b) First, use the cutting equipment to cut and separate the blade main beam, blade root, and the epoxy resin fiberglass sandwich panel shell of the waste wind turbine blades, and then use the cutting equipment to precisely cut the epoxy resin fiberglass sandwich panels to obtain the epoxy resin fiberglass sandwich panel profiles required for the H-type vertical axis micro wind turbine blades;

[0027] (c) According to the specification requirements of the H-type vertical axis micro wind turbine blades, combine the cut epoxy resin fiberglass sandwich panel profiles of the waste wind turbine blades;

[0028] (d) Use special equipment to grind the bonding surfaces of the combined epoxy resin fiberglass sandwich panel profiles (the parts that need to be bonded) into uniformly rough textures;

[0029] (e) assembling and bonding the epoxy resin fiberglass sandwich panels with polished bonding surfaces to form an H-shaped vertical axis micro-wind generator blade blank;

[0030] (f) pressurizing and curing the bonded H-shaped vertical axis micro-wind generator blade blank;

[0031] (g) Use a CNC gantry milling machine to precisely process the cured epoxy resin fiberglass sandwich panel blank to make its shape meet the requirements of the H-shaped vertical axis micro-wind generator blade;

[0032] (h) embedding the fixed nut embedded parts connected to the hub bracket in the processed blades;

[0033] (i) Install plugs at both ends;

[0034] (j) wrapping a layer of epoxy resin fiberglass skin on the processed H-shaped vertical axis micro-wind generator blade blank;

[0035] (k) Polishing and spraying of H-shaped vertical axis micro wind generator blades with wrapped skin;

[0036] Preferably, the waste wind turbine blades are precisely cut and separated.

[0037] Preferably, the epoxy resin fiberglass sandwich panels of waste wind turbine blades are precisely cut.

[0038] Preferably, the epoxy resin fiberglass sandwich panels of waste wind turbine blades are bonded into H-shaped blade vertical axis blade blanks.

[0039] Preferably, the blank is machined into shape using a CNC gantry milling machine.

[0040] Preferably, nut embedded parts and plugs on both sides are installed on the blade blank.

[0041] Preferably, the epoxy resin fiberglass material skin is wrapped.

[0042] Preferably, the connection process includes bonding and winding.

[0043] Preferably, after step (j), the blade is subjected to surface treatment, including coating with UV protection and anti-corrosion coating, and performing necessary smoothing treatment to improve the aerodynamic performance and aesthetics of the blade;

[0044] Preferably, the waste wind turbine blades are mainly composed of epoxy resin fiberglass composite materials with epoxy resin fiberglass material skin and balsa wood and PVC foam as core materials.

[0045] Preferably, the blade of the H-type vertical-axis micro-wind generator is mainly composed of an epoxy resin fiberglass skin and an epoxy resin fiberglass composite material with balsa wood and plastic foam as the core materials.

[0046] Preferably, the blade of the H-type vertical-axis micro-wind generator is applicable to decentralized power generation in cities, rural areas, remote areas, agricultural fields, families and residences, traffic supervision, telecommunications base stations, toll stations, outdoor lighting, educational institutions, small enterprises, eco-tourism and camping areas.

[0047] Beneficial effects

[0048] The present invention provides a method for regenerating the blade of an H-type vertical-axis micro-wind generator from waste wind turbine blades, which has the following beneficial effects:

[0049] 1. Solved the problem of recycling and reusing waste wind turbine blades.

[0050] 1. Realized the resource-based and high-value reuse of waste wind turbine blades, gave the waste wind turbine blades a second life, achieved secondary utilization, extended the service life of the blades, improved the resource utilization rate, reduced environmental pollution, reduced a large amount of resource waste, avoided the disadvantages brought by the current pyrolysis, chemical solvent, incineration, and mechanical recycling methods, realized the reuse of waste resources, reduced the dependence on primary resources, and solved the problem of treating waste wind turbine blades.

[0051] 2. Using balsa wood and plastic foam composite sandwich panels to manufacture the blades instead of aluminum alloy profiles saves primary resources.

[0052] 3. Reduced noise: The epoxy resin composite sandwich panel blades are lightweight, and the noise generated during operation is relatively reduced. This is an important advantage for wind power generation installed in areas with high noise requirements such as residential areas and commercial areas;

[0053] 4. Strong performance adaptability: The structure of large waste wind turbine blades is designed to adapt to high-power and high-wind-speed operation, and the epoxy resin composite sandwich panel can meet the performance requirements of the blades of the H-type vertical-axis micro-wind generator;

[0054] 5. Strength and durability: Wind turbine blades need to meet strict quality and performance requirements during design and manufacturing. They are usually composed of composite plates with balsa wood and plastic foam cores and a skin of high-strength epoxy resin fiberglass material glass fiber reinforced plastic (GFRP) or carbon fiber reinforced plastic (CFRP). These materials have the properties of light weight, high strength, and corrosion resistance, and are suitable for use in outdoor environments.

[0055] 2. The composite sandwich panel reduces the weight of the blade, and the following effects can be achieved

[0056] 1. Increase the starting wind speed: Reduced blade weight means that a lower wind speed is required to start power generation, which increases the available wind speed range of the wind turbine and improves its power generation efficiency in low wind speed areas.

[0057] 2. Reduce bearing wear: Lighter blades put less pressure on bearings, which can reduce bearing wear and extend maintenance cycles and service life.

[0058] 3. Improve efficiency: Reducing blade weight can reduce the moment of inertia, making the wind turbine respond more quickly and sensitively to changes in wind speed, thereby improving the overall energy capture efficiency.

[0059] 4. Reduce costs: The blades are one of the heaviest parts of a wind turbine. By reducing the weight of the blades, the overall manufacturing cost as well as the transportation and installation costs can be reduced.

[0060] 5. Enhanced reliability: Lighter blades are subjected to less stress in strong winds, reducing the risk of damage due to extreme weather conditions, thereby improving the reliability of the system.

[0061] 6. Reduced land use: Due to their structural characteristics, VAWTs can usually be arranged more compactly, and reducing the weight of the blades helps to further optimize land use efficiency.

[0062] 7. Environmentally friendly: Making lighter blades may require the use of less material, which helps reduce resource consumption and environmental impact during the production process.

[0063] 8. Easy maintenance: Lighter blades make maintenance work easier, such as replacing damaged blades.

[0064] 9. Improved dynamic characteristics: Reducing the weight of the blades can reduce the natural frequency of the system, help avoid resonance with the frequency of the wind, and improve the dynamic characteristics of the wind turbine. BRIEF DESCRIPTION OF THE DRAWINGS

[0065] Figure 1 This is a schematic diagram of the H-type vertical axis breeze generator blade structure of the present invention.

[0066] Figure 2 This is a schematic diagram of the H-type vertical axis breeze generator blade structure of the present invention.

[0067] Figure 3 It is a schematic diagram of the structure of the waste wind turbine blades of the present invention. DETAILED DESCRIPTION

[0068] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0069] See also Figures 1-3 The present invention provides a technical solution: a method for regenerating H-shaped vertical axis micro-wind generator blades from waste wind turbine blades, comprising the following steps:

[0070] (a) Determine the cutting plan according to the specifications and shape requirements of the H-shaped vertical axis micro-wind generator blades and the shape of the epoxy resin fiberglass sandwich panels of the waste wind turbine blades;

[0071] (a) Determine the cutting plan according to the specifications and shape requirements of the H-shaped vertical axis micro-wind generator blades and the shape of the epoxy resin fiberglass sandwich panels of the waste wind turbine blades;

[0072] (b) firstly, the main beam and blade root of the waste wind turbine blade are cut and separated from the epoxy resin glass fiber reinforced plastic sandwich panel shell by using a cutting device, and then the epoxy resin glass fiber reinforced plastic sandwich panel is precisely cut by using a cutting device to obtain the epoxy resin glass fiber reinforced plastic sandwich panel profile required for the H-shaped vertical axis micro-wind generator blade;

[0073] (c) according to the specification requirements of the H-shaped vertical axis micro-wind generator blade, the cut waste wind turbine blade epoxy resin fiberglass sandwich panel profiles are matched and combined;

[0074] (d) Use special equipment to grind the assembled epoxy resin fiberglass sandwich panel profile (the part to be bonded) into a bonding surface with a uniform rough texture;

[0075] (e) assembling and bonding the epoxy resin fiberglass sandwich panels with polished bonding surfaces to form an H-shaped vertical axis micro-wind generator blade blank;

[0076] (f) pressurizing and curing the bonded H-shaped vertical axis micro-wind generator blade blank;

[0077] (g) Use a CNC gantry milling machine to precisely process the cured epoxy resin fiberglass sandwich panel blank to make its shape meet the requirements of the H-shaped vertical axis micro-wind generator blade;

[0078] (h) embedding the fixed nut embedded parts connected to the hub bracket in the processed blades;

[0079] (i) Add plugs to both ends of the H-shaped vertical axis micro-wind generator blade blank;

[0080] (j) Wind a layer of epoxy resin fiberglass skin on the machined and formed H-type vertical axis micro wind turbine blade blank;

[0081] (k) Polish and spray paint the surface of the H-type vertical axis micro wind turbine blade wrapped with skin;

[0082] By adopting the above technical solutions, through cutting, processing and surface treatment of waste wind turbine blades, they are made to meet the requirements of H-type vertical axis micro wind turbine blades. Using epoxy resin fiberglass material for the skin improves the strength and durability of the blades. After surface treatment, it ensures efficient capture of wind energy by the blades.

[0083] By adopting the above technical solutions, cutting is carried out according to the characteristics of different parts of the blade, making the blade shape more reasonable and meeting the requirements of high-performance wind energy capture for H-type vertical axis wind turbine blades.

[0084] This embodiment is further set as that the process includes bonding, numerical control machining, winding, etc.

[0085] By adopting the above technical solutions, the most suitable connection method is selected according to specific situations to ensure the strength and reliability of blade connection.

[0086] This embodiment is further set as that after step (j), surface treatment is carried out on the blade, including coating an anti-ultraviolet coating and performing necessary smoothing treatment to improve the aerodynamic performance and aesthetics of the blade;

[0087] This embodiment is further set as that the waste wind turbine blades mainly consist of a composite board with a skin made of glass fiber reinforced plastic and carbon fiber reinforced plastic, and a balsa wood and plastic foam epoxy resin fiberglass sandwich panel.

[0088] This embodiment is further set as that the H-type vertical axis micro wind turbine blades are applicable to distributed power generation in cities, rural areas, remote areas, agricultural fields, families and residences, traffic supervision, telecommunication base stations, toll stations, outdoor lighting, educational institutions, small enterprises, eco-tourism and camping areas.

[0089] By adopting the above technical solutions, the application scenarios of the recycled blades are clarified, its usage range is broadened, and its applicability in different fields is improved.

[0090] By those skilled in the art, the components in this case are connected in sequence. For the specific connection and operation sequence, reference should be made to the following working principle. The detailed connection means are well-known techniques in this field. The following mainly introduces the working principle and process.

[0091] Embodiment: First, a cutting plan is formulated according to the shape of the waste wind turbine blades and the requirements of the H-type vertical axis micro-wind generator blades. Taking into account the structural characteristics of the waste wind turbine blades, the parts and size specifications that need to be cut are determined, and the epoxy resin fiberglass sandwich panels of the waste wind turbine blades are cut into profiles using cutting equipment to obtain the epoxy resin fiberglass sandwich panel profiles required for the H-type vertical axis micro-wind generator blades. The cut epoxy resin fiberglass sandwich panel profiles are assembled and bonded, and the assembled epoxy resin fiberglass sandwich panel profiles are finely processed using a CNC gantry milling machine to form a shape that meets the design requirements of the H-type vertical axis micro-wind generator blades. A layer of epoxy resin fiberglass material skin is wrapped around the processed H-type vertical axis blades, the blades are surface polished, coated with an anti-ultraviolet coating, and necessary smoothing treatment is performed to improve the aerodynamic performance and aesthetics of the blades.

[0092] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions. The sentence "includes an element defined by ... does not exclude the existence of other identical elements in the process, method, article or device including the element".

[0093] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for regenerating the blades of an H-type vertical axis micro-wind generator from waste wind turbine blades, characterized in that, The following steps are involved: (a) Determine the cutting plan according to the specifications and shape requirements of the H-shaped vertical axis micro-wind generator blades and the shape of the epoxy resin fiberglass sandwich panels of the waste wind turbine blades; (b) firstly, the main beam and blade root of the waste wind turbine blade are cut and separated from the epoxy resin glass fiber reinforced plastic sandwich panel shell by using a cutting device, and then the epoxy resin glass fiber reinforced plastic sandwich panel is precisely cut by using a cutting device to obtain the epoxy resin glass fiber reinforced plastic sandwich panel profile required for the H-shaped vertical axis micro-wind generator blade; (c) according to the specification requirements of the H-shaped vertical axis micro-wind generator blade, the cut waste wind turbine blade epoxy resin fiberglass sandwich panel profiles are matched and combined; (d) Use special equipment to grind the part of the epoxy resin fiberglass sandwich panel profile that needs to be bonded to produce a bonding surface with a uniform rough texture; (e) assembling and bonding the epoxy resin fiberglass sandwich panels with polished bonding surfaces to form an H-shaped vertical axis micro-wind generator blade blank; (f) pressurizing and curing the bonded H-shaped vertical axis micro-wind generator blade blank; (g) Use a CNC gantry milling machine to precisely process the cured epoxy resin fiberglass sandwich panel blank to make its shape meet the requirements of the H-shaped vertical axis micro-wind generator blade; (h) Embed the fixed nut embedded parts connected to the hub bracket on the processed blades; (i) Install plugs at both ends; (j) wrapping a layer of epoxy resin fiberglass skin around the processed H-shaped vertical axis micro-wind generator blade blank; (k) Polishing and spraying of the surface of H-shaped vertical axis micro-wind generator blades wrapped with epoxy resin fiberglass skin.

2. The method for regenerating the blade of an H-type vertical axis micro-wind generator from waste wind power blades according to claim 1, wherein, After step (j), the blade is subjected to surface treatment, including coating with UV protection and anti-corrosion coating, and smoothing treatment, so as to improve the aerodynamic performance and aesthetics of the blade.

3. A method for regenerating blades of an H-type vertical axis micro-wind generator from waste wind turbine blades according to claim 1, characterized in that, The waste wind turbine blades are mainly composed of epoxy resin glass fiber reinforced plastic skins and epoxy resin glass fiber reinforced plastic sandwich panels with balsa wood and plastic foam as cores.

4. A method for regenerating blades of an H-type vertical axis micro-wind generator from waste wind turbine blades according to claim 1, characterized in that, The H-shaped vertical axis breeze generator blade is suitable for distributed power generation in cities, villages, remote areas, agricultural fields, homes and residences, traffic supervision, telecommunication base stations, toll booths, outdoor lighting, educational institutions, small businesses, eco-tourism and camping areas.

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