This equipment is suitable for the percolation operation of traditional Chinese medicine, food, chemical industry, etc.
　　Percolation is a method of extracting the extract from the lower outlet of crude powder of medicinal materials by continuously adding leaching solvent to make it permeate through the powder. When soaking, the solvent infiltrates into the cells of medicinal materials to dissolve a large number of soluble substances, the concentration increases, the density increases and then moves downward. The upper leaching solvent or dilute leaching solution displaces the position, resulting in a good concentration difference, which makes the diffusion better and natural. Therefore, the leaching effect is better than that of the soaking method, and the extraction is also more complete.
　　The equipment consists of cylinder, vertebral body, elliptical head (or flat cover), pneumatic slag discharging door, pneumatic operating table, etc. It has the characteristics of uniform solvent distribution and convenient slag discharging.