大宗风电退役风机叶片资源化回收利用技术研究进展

After putting forward the goal of "carbon neutrality" in 2020,wind power generation in China has shown explosive growth,with the increasing demand for fan blades. At the same time,large-scale wind turbines have gradually begun to retire. It is expected that the cumulative number of retired wind turbine blades in China will reach 2.88 million tons by 2040. Because of the complexity of the materials used in the blades,resource recovery and utilization remains a challenge. The manufacturing characteristics of blades,the source of waste, the necessity of treatment were introduced,and the treatment technologies from the aspects of environmental impact and product value were elaborated. The research results show that the current treatment methods for blades include mechanical treatment,landfill treatment,chemical dissolution treatment,incineration treatment and pyrolysis treatment,among which incineration treatment includes incineration power generation and collaborative disposal of cement kiln. Finally,according to the characteristics of retired wind turbine blades and the advantages and disadvantages of treatment methods,and combined with the current actual situation in China,it is recommended to give priority to the development of collaborative disposal of cement kiln. The combustion of combustible components in the wind turbine blades can provide energy for cement sintering,while solid residues such as glass fiber are used as clinker cement raw materials. This method can maximize the resource utilization of the retired wind turbine blades,but the mixing ratio should be reasonably controlled. In addition,the pyrolysis treatment method can be properly developed to completely treat retired wind turbine blades,with the advantages of capacity reduction,volume reduction and resource recovery. But treatment cost is high,and pyrolysis products are difficult to reuse. Therefore,the key to improving the economic benefits of pyrolysis treatment is to give full play to the value of pyrolysis products and reduce treatment costs.