The process of filtration, washing, and drying can be completed in WD. The process flow can be simplified and production efficiency can be improved. Moreover, material pollution can be prevented and steam sterilization can be performed. It is more convenient for cleaning and material replacement, and electronic and mechanical operation can be integrated. At the same time, the occupation of clean workshop can be reduced and customer investment costs can be reduced . It is widely applied in pharmaceutical, biochemical, food, beverage, fine chemical, dye and other industries. It is especially suitable for production sites with high clean requirements, small batches and multiple varieties.