Wind power blade recovery method taking fiber reinforced anhydride cured epoxy resin as main body

By using swelling reagent pretreatment and catalytic degradation system, the problems of harsh reaction conditions and incomplete degradation products in existing technologies have been solved, achieving efficient recovery of fiber-reinforced anhydride-cured epoxy resin, reducing costs and improving resource utilization.

CN121021920APending Publication Date: 2025-11-28JILIN UNIVERSITY
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Patent Information

Application Number
CN202511346879.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-09-19
Publication Date
2025-11-28

AI Technical Summary

Technical Problem

Existing technologies for recycling waste wind turbine blades involve harsh reaction conditions and incomplete recovery of degradation products, particularly neglecting the recovery of fiber-reinforced anhydride-cured epoxy resins, leading to resource waste and high costs.

Method used

A swelling reagent pretreatment and catalytic degradation system is used to recover fiber-reinforced anhydride-cured epoxy resin through mechanical crushing, swelling, catalytic degradation and extraction rotary evaporation. A specific catalyst is used to achieve efficient degradation under mild conditions, and high-value resin monomers are separated and recovered.

Benefits of technology

This process achieves high degradation efficiency during recycling, allows degradation products to be partially added to new resin for curing, reduces the degradation efficiency of epoxy resin, enables repeated recycling of the catalyst, and reduces the overall reaction conditions of epoxy resin. High-value resources in the leaves are fully recycled and utilized, avoiding resource waste.

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Abstract

The invention relates to the field of waste fan blade recovery, in particular to a wind power blade recovery method with fiber reinforced anhydride cured epoxy resin as a main body. The degradation efficiency of the whole reaction is improved through the swelling reagent, a part of degradation products obtained through catalyst degradation can be added into new resin according to a certain proportion to be cured, the whole cost of the epoxy resin is effectively reduced, the catalyst can be recycled, and the efficiency is not affected. The reaction conditions in the whole recovery process are mild, high-value resources in the leaves are fully recycled, and waste of the resources is avoided. The degradation rate of the catalyst system is high and can reach 95% or above, and the effectiveness of the catalyst is still guaranteed after the catalyst is circulated for five times or above. The mechanical property of the acid anhydride cured epoxy resin obtained by adding the epoxy resin monomer recovered by degrading the waste wind turbine blade into the new monomer according to a certain proportion is not obviously influenced, and the performance requirement of the thermosetting acid anhydride cured epoxy resin is met.
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