Recycling processing method for wind turbine blades

A recycling processing method for wind turbine blades, comprising steps of:

• a) cutting waste material into a plurality of waste material blocks of a wind turbine blade;
• b) immersing the waste material blocks into a first degradation solution to carry out a first degradation process, forming a plurality of swollen waste material blocks and a degradation residual liquid;
• the first degradation solution comprises a main component, an auxiliary component, and water, wherein the main component is selected and made up from either one or a combination of two or more of the following acids:
• formic acid, acetic acid, propionic acid, and butyric acid;
• and the auxiliary component is selected and made up from either one or a combination of two or more of the following compounds:
• nickel nitrate, copper nitrate, nickel chloride, copper chloride, hydrogen peroxide, ferrous chloride, cuprous chloride, zinc chloride, aluminum chloride, copper acetate or potassium permanganate;
• the mass ratio of the waste material block to the first degradation solution is between 1:1.5 and 1:20;
• the first degradation process involves immersing the waste material blocks into the first degradation solution for 5 to 72 hours at a temperature between 18° C. to 30° C. and under normal pressure;
• c) cleaning and separating the swollen waste material blocks into fibrous layer material and non-fibrous layer material;
• d) immersing the fibrous layer material into a second degradation solution to proceed with a second degradation process, forming a plurality of swollen fibrous material and degradation residual liquid, wherein the mass ratio of the fibrous material to the second degradation solution is between 1:2 and 1:18, and the second degradation process involves immersing the fibrous material into the second degradation solution for 30 minutes to 8 hours under normal pressure and at a temperature between 60° C. to 80° C.;
• and
• e) recovering the degradation residual liquid and carrying out a separation and purification process thereon;
• wherein the ratio between the main components, the auxiliary components and the water in the second degradation solution is between 5~8:1~3:0.5~1.5, respectively, and the composition of the first degradation solution used in the first degradation process is different from the composition of the second degradation solution used in the second degradation process.