The Filter-Wash-Dry Three-in-One process completes the steps of mixing, reaction, filtration, cleaning, dewatering, drying (and can be pulped again), all within a sealed container. It boasts simple structure, streamlined process flow, high production efficiency, no cross-contamination, easy material change, and high level of automation. Additionally, it significantly reduces the volume of required cleanroom space and has a low basic investment cost.