Method for preparing hydrophobic activated carbon fibers from carbon felt leftover materials

The invention provides a method for preparing hydrophobic activated carbon fibers from carbon felt leftover materials. The method comprises the following steps: S1, pretreatment: cutting the carbon felt leftover materials into blocks; S2, lapping: uniformly spreading the blocky carbon felt leftover materials on the upper surface of a conveying mesh belt; S3, spraying and presoaking on the front surface and the back surface: spraying an activating agent on the upper surface and the lower surface of the conveying mesh belt for activation, and starting a negative pressure suction device in the conveying process of the conveying mesh belt; S4, steam activation, treating the carbon felt leftover materials through steam; S5, carbonization and activation: putting the carbon felt leftover materials into a carbonization furnace, and further activating the carbon felt leftover materials; and S6, spot check and packing: carrying out sample spot check on the carbon felt leftover materials, wherein when the specific surfa