TQSF120×2 double-layer classified destoner utilizes the specific gravity difference between the grains and impurities to remove the stones from raw grains. It adds second cleaning device with independent fan so that it can double-check the grains that contain the impurities such as scree from main sieve. It separates grains from scree, increases stone-removing efficiency of destoner and reduces loss of cereal.
This machine is with novel design, firm and compact structure, small covering space. It requires no lubication. It is widely applicable for cleaning up the stones which have the same size as grains in the grain and oil mill processing.