A kind of cleaning method of medlar

Abstract

The invention discloses a method for cleaning barbary wolfberry fruit. The method comprises the following steps of: spreading the barbary wolfberry fruit on a mesh screen conveying belt, flushing the barbary wolfberry fruit with sodium carbonate aqueous solution, and flushing with water to finish cleaning the barbary wolfberry fruit; and performing vacuum drying to avoid the phenomenon of surface hardening on the surface of the barbary wolfberry fruit which is easily caused by normal-pressure drying, In a normal-pressure hot air drying process, a fluid boundary layer is formed on the surface of barbary wolfberry fruit, heated and vaporized water vapor is diffused into the air through the fluid boundary layer, and internal moisture of the barbary wolfberry fruit moves towards the surface, wherein if the moving speed of the moisture is lower than the evaporating speed on the surface of the boundary layer, a water film on the boundary layer is broken, and a local crack phenomenon occurs on the surface of the barbary wolfberry fruit and expands to the entire outer surface, so that surface hardening is formed. During vacuum drying, the internal and external temperature gradient of barbary wolfberry fruit is small, and solvent water moves independently under the reverse osmosis action, so that the dissipation of active ingredients in barbary wolfberry fruit is reduced.

Description

technical field [0001] The invention relates to a method for cleaning medlar. Background technique [0002] Before the fresh wolfberry is picked and dried, the dust, wax, pesticides and other impurities remaining on the surface of the wolfberry should be cleaned with an aqueous solution of sodium carbonate with a mass concentration of 0.1-0.5%. Specific method: Pour fresh wolfberry into a vat or pool filled with sodium carbonate aqueous solution, roll it up and down several times and then take it out and dry it naturally. This is easy to break the skin of fresh wolfberry, and the sodium carbonate aqueous solution will be polluted quickly It is inconvenient to replace, which is not conducive to stabilizing the quality of wolfberry cleaning. It can be seen that the chaos in the existing processing industry poses a threat to food safety. [0003] Lycium barbarum is generally dried in the sun and hot air, but the color of wolfberry is not well controlled and easy to change col...

AI Technical Summary

Problems solved by technology

Specific method: Pour fresh wolfberry into a vat or pool filled with sodium carbonate aqueous solution, roll it up and down several times and then take it out and dry it naturally. This is easy to break the skin of fresh wolfberry, and the sodium carbonate aqueous solution will be polluted quickly It is inconvenient to replace, which is not conducive to stabilizing the quality of wolfberry cleaning

It can be seen that the chaos in the existing processing industry poses a threat to food safety

[0003] Lycium barbarum is generally dried in the sun and hot air, but the color of wolfberry is not well controlled and easy to change color, which is not conducive to ensuring the quality of wolfberry