Peanut kernel is composed of the red skin and seed kernel. The red skin is mainly fibrous tissue and stypticin, while the grease, protein and other nutrients of peanut are concentrated in the seed kernel. The bonding force between the red skin and kernel of mature peanut is related to the water content of peanut. When the water reaches a certain value, the binding force would reduce to a minimum. Then, the red skin can be peeled from the kernel by a very small force. Dry peeling method is to dry the peanut to a certain degree, then peel the red skin from the seed kernels with colloid asynchronous double roller device and separate them according to the proportion difference. Remove the red skin of peanut after drying and cooling to 40°C. The raw material peeling efficiency is required to be greater than 98%. Red skin separated by winnowing can be sent to the pharmacy.
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