Food freeze-drying machine uses freeze-drying technology to freeze and crystallize water-containing food, and then sublimates and dries to remove water in a vacuum environment to obtain freeze-dried food with very little water. It is widely used in various fruit and vegetable freeze-drying and meat freeze-drying. processing.
Seafood abalone contains high-protein, low-fat food, delicious taste and rich nutrition. In order for abalone to be preserved for a long time at room temperature without destroying the original nutrients, color, aroma, taste, and body shape, the food freeze dryer is used in the freeze-drying process of seafood abalone, changing the traditional drying or sun-drying method.
The selected fresh abalone is washed, cooked, cooled, soaked, color-protected, drained and other pre-treatment processes, and then put into the food freeze-drying machine material bin for 3~5 hours of in-situ pre-freezing at -45℃, and then dried for 10 hours. The temperature is controlled at -30~+30℃, the vacuum degree is controlled at about 40PA, and the displacement water is removed after drying. After analytical drying for about 8 hours, the sublimation drying temperature was controlled at 35~60℃, and the vacuum degree was controlled at about 30PA. After removing the bound water, the frozen dried abalone with water content of 2~5% was obtained. In the vacuum environment at low temperature, the crystallized water in solid state is sublimed directly into gaseous state to remove, without destroying the original structure and producing oxidation reaction, and greatly preserving the original structure and nutrients. After being treated by food freeze-drying machine, the water rarely can be preserved at room temperature for a long time, and it has good rehydration. After rehydration, the original properties of abalone can be restored.
Food freeze-drying machine is also widely used in vegetable freeze-drying, fruit freeze-drying, meat freeze-drying, fish freeze-drying, tea freeze-drying and Chinese medicinal materials freeze-drying processing and production.
