How to efficiently recycle fiberglass blades

Time:2024-06-19

Background on recycling

As the total number of wind power installations continues to grow globally, wind power facilities installed in earlier periods are reaching the end of their operational life, resulting in a large number of wind turbine blades that need to be scrapped and recycled.

Introduction to Fiberglass Blades

Fiberglass blades are mainly made of fiberglass material. Glass fiber is a fiber material made of glass as raw material by melting and drawing, which has excellent mechanical and mechanical properties, chemical stability and insulating properties. It has low density and good lightweight performance, which can reduce the weight of the blade and thus improve the energy conversion efficiency of the blade. At the same time, the glass fiber also has high tensile strength and can withstand greater operational loads, ensuring its stability and durability during long periods of operation in wind farms.

Recycling process

Waste fiberglass blades first enter the shredding stage. At this stage, the blades are initially shredded using low-speed shredders. These machines cut the blades into preliminary fragments of about 50 to 100 mm by means of powerful blades, preparing them for subsequent refinement.

Next, the preliminarily crushed blade fragments are fed into the hammer crushing stage. In this stage, the fragments enter the hammer mill, which is equipped with high-speed rotating hammer heads inside the machine. These hammers repeatedly impact and shear the fragments to further reduce their size. After hammer crushing, the size of the fragments can be significantly refined.

Subsequently, the finely milled fragments that have undergone hammer comminution proceed to the milling stage. In this stage, grinding is carried out using PNMP mills. These machines cause repeated impact and friction on the fragments by means of a high speed rotating grinding media, which gradually refines them into a powder. The ground powder is then sifted through a sieving machine to separate out the different sizes of powder and ensure a uniform particle size.

Finally, the sieved fiberglass powder can be used to make new fiberglass products, filler materials or other composites, depending on its particle size and quality. These powders are transformed from waste blades to reuse in the recycling process, realizing the recycling of resources.

Advantages

Efficient crushing and grinding technology allows the blades to be quickly crushed to the required size, increasing recycling efficiency.
By adjusting the parameters of the crushing and grinding equipment, the particle size of the recycled glass fiber particles can be precisely controlled to meet the needs of different reuse areas.
The recycled glass fiber particles still have good strength, durability and chemical stability, making them suitable for use in the manufacture of high-quality recycled products.

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