CN-121974587-A - Recycling method of retired wind power blade

CN121974587ACN 121974587 ACN121974587 ACN 121974587ACN-121974587-A

Abstract

The invention provides a recycling method of retired wind power blades, which aims at excavating the material values of different parts of retired wind power blades, considers the difference of the quantity of continuous fibers contained in main beams, webs and skin parts of the blades, processes the main beam parts rich in the continuous fibers into blocky coarse fiber particles, processes the web and skin parts into fine powder materials, and is cooperatively used for preparing concrete materials. According to the invention, the materials at each part of the blade are endowed with the adaptive functional positioning through the partial potential difference treatment of the blade, and no idle component exists, so that the full-component high-value utilization is finally realized.

Inventors

WANG CHEN
Wang Diefan
LIU ZHONGYUAN
CHEN CHUAN
QIN MING
LIAN CHONG
YING RUI
Cheng Shuaibing
YU GUANGMING
LIU XIAOCHI
YANG DINGHUA
LIU XIANGYIN

Assignees

中国长江三峡集团有限公司

Dates

Publication Date: 20260505
Application Date: 20260104

Claims (10)

1. The method for recycling the retired wind power blade is characterized by comprising the following steps: mechanically cutting the main beam part of the blade to obtain massive coarse fiber particles; Mechanically crushing the web plate and the skin part of the blade, and processing the web plate and the skin part into fine powder; and taking the massive coarse fiber particles and the fine powder as filling aggregate for preparing concrete materials.
2. The method for recycling retired wind power blade according to claim 1, wherein the thickness of the massive coarse fiber particles is 0.7-1.0 mm, the width is 2.5-4.0 mm, and the length is 50-70 mm.
3. The method for recycling retired wind power blades according to claim 1, wherein the particle size of the fine powder is 40-200 mesh.
4. The method for recycling retired wind power blade according to claim 1, wherein the block-shaped coarse fiber particles and fine powder are used as filling aggregate for preparing concrete materials, comprising: Pre-mixing the massive coarse fiber particles with coarse aggregate, adding fine aggregate and the fine powder, and dry-mixing to form mixed aggregate; And adding a cementing material into the mixed aggregate, continuously adding a proper amount of water and an additive after dry mixing, and carrying out wet mixing to obtain the concrete material.
5. The method for recycling retired wind power blade according to claim 1 or 4, wherein the grade of the concrete material is C15-C60, the mixing amount of the massive coarse fiber particles is 0.8% -1.5% based on the volume fraction of the concrete material, and/or The mixing amount of the fine powder is 5% -15%.
6. The method for recycling the retired wind power blade according to claim 4, wherein the grade of the concrete material is C45-C60, the doping amount of the massive coarse fiber particles is 1.2% -1.5% based on the volume fraction of the concrete, and the total doping amount of the coarse aggregate and the massive coarse fiber particles is 31% -40%; The mixing amount of the fine powder is 8% -10%, and the total mixing amount of the fine aggregate and the fine powder is 24% -34%; the mixing amount of the cementing material is 14% -18%, the mixing amount of the water is 5% -7.5%, and the mixing amount of the additive is less than 1%.
7. The method for recycling the retired wind power blade according to claim 4, wherein the grade of the concrete material is C30-C45, the mixing amount of the massive coarse fiber particles is 1% -1.2% based on the volume fraction of the concrete, and the total mixing amount of the coarse aggregate and the massive coarse fiber particles is 32% -38%; the mixing amount of the fine powder is 10% -12%, and the total mixing amount of the fine aggregate and the fine powder is 32% -38%; The mixing amount of the cementing material is 13% -17%, the mixing amount of the water is 5.2% -8.5%, and the mixing amount of the additive is less than 1%.
8. The method for recycling the retired wind power blade according to claim 4, wherein the grade of the concrete material is C15-C25, the mixing amount of the massive coarse fiber particles is 0.8-1% based on the volume fraction of the concrete, and the total mixing amount of the coarse aggregate and the massive coarse fiber particles is 30-37%; the mixing amount of the fine powder is 12-15%, and the total mixing amount of the fine aggregate and the fine powder is 35-42%; the mixing amount of the cementing material is 10% -14%, the mixing amount of the water is 5% -8.4%, and the mixing amount of the additive is less than 1%.
9. The recycling method of retired wind power blades according to claim 4, wherein the particle size of the coarse aggregate is 5-25 mm, and the particle size of the fine aggregate is 0.16-5 mm.
10. The method for recycling retired wind power blades according to claim 4, wherein the concrete material is poured by a high-frequency wall-attached vibrator.

Description

Recycling method of retired wind power blade Technical Field The invention relates to the technical field of solid waste recycling and building materials, in particular to a recycling method of retired wind power blades. Background With the transformation of global energy structures to clean energy, wind power generation has been developed on a large scale as an important component of renewable energy. Along with the method, the wind driven generator blades put into operation in early stages gradually enter the retirement period, and a large amount of wind power blade wastes are generated. According to statistics, the number of the retired wind power blades worldwide is growing at a high speed, and harmless treatment and recycling utilization of the retired wind power blades become key bottlenecks for restricting sustainable development of the wind power industry. The core material of the wind power blade is glass fiber reinforced composite (GFRP), and the material is formed by compounding glass fibers and a resin matrix, has the excellent characteristics of light weight, high strength, corrosion resistance and the like, and simultaneously brings great challenges to waste recovery due to complex components and strong chemical stability. At present, the recovery processing technology for retired wind power blades in the industry mainly comprises the following steps of 1, a chemical recovery method and a pyrolysis recovery method, wherein the method is used for breaking a resin matrix through chemical reagent dissolution or pyrolysis, so that glass fibers and resin are separated. The method has the advantages of being complex in process, high in equipment investment, difficult to realize large-scale application due to high recovery cost, capable of damaging the structure of the glass fiber due to the use of chemical reagents or high-temperature environment, reducing the mechanical properties of the fiber and incapable of fully exerting the reinforcing potential of the fiber, and capable of directly mixing the retired wind power blade into building materials such as concrete through mechanical crushing. However, the single recovery mode has obvious short plates, on one hand, the crushed mixed particles lack targeted treatment, when the crushed mixed particles are used as fillers, the concrete performance cannot be improved, on the other hand, the strength of the concrete is reduced due to the problems of poor interface combination and the like, and on the other hand, the method does not distinguish the reinforcing function of glass fibers in the blade from the potential utilization value of a resin matrix, so that the resource waste is caused. In summary, the existing retired wind power blade recovery technology has the problems of single function, low resource utilization rate, poor economic benefit and the like, and development of a novel recovery and application technology which can give consideration to material enhancement and filling functions, adapt to different part characteristics of the blade and realize full-component high-value utilization is needed, so that a solution is provided for green treatment of the retired wind power blade, and innovation development of high-performance concrete materials is promoted. Disclosure of Invention Aiming at the problems in the background art, the invention provides a recycling method of the retired wind power blade, which can realize the high-value utilization of all components of the retired wind power blade and promote the innovative development of high-performance concrete materials by accurately matching the material characteristics of all parts of the blade and the functional requirements of concrete. The specific invention comprises the following steps: The invention provides a recycling method of retired wind power blades, which comprises the following steps: mechanically cutting the main beam part of the blade to obtain massive coarse fiber particles; Mechanically crushing the web plate and the skin part of the blade, and processing the web plate and the skin part into fine powder; and taking the massive coarse fiber particles and the fine powder as filling aggregate for preparing concrete materials. Optionally, the bulk coarse fiber particles have a thickness of 0.7-1.0mm, a width of 2.5-4.0mm, and a length of 50-70mm. Optionally, the particle size of the fine powder is 40-200 mesh. Optionally, the massive coarse fiber particles and the fine powder are used as filling aggregate for preparing concrete materials, and the method comprises the following steps: Pre-mixing the massive coarse fiber particles with coarse aggregate, adding fine aggregate and the fine powder, and dry-mixing to form mixed aggregate; And adding a cementing material into the mixed aggregate, continuously adding a proper amount of water and an additive after dry mixing, and carrying out wet mixing to obtain the concrete material. Optionally, the bulk coarse fiber particles are incorp