Microwave-vacuum freezing drying dehydration process integrated industrialized technology

Abstract

The invention discloses an integration industrialization new technology of the microwave-vacuum dehydration freeze-drying process, integrated combines the microwave freeze-drying technology and vacuum drying dehydration technology, carries on in grading, that is, using the reasonable dehydration drying method which combines the pre-microwave dehydration and the evening vacuum freeze-drying dehydration, its result are perfects the dehydration process, reduces the drying time and the energy consumption, improves the product quality, is a high-quality, highly efficient, energy-saving technology integration new technology. The invention can rapidly dehydrate, has high production efficiency and shorts the 1 / 2 to 1 / 3 time of the simple dehydration process by vacuum freeze-drying; energy saving effect is significant, can reduce energy consumption 30 to 40 percent of the simply freeze-dried by vacuum dehydration process.

Description

technical field

[0001] The invention relates to the technical field of drying. Background technique

[0002] Dehydration is a common method of preserving food. The reduced weight of dry food can save transportation costs and extend shelf life. However, because most of the traditional drying processes use hot air drying, the quality of dried products is not good, especially for some dehydrated products with high heat sensitivity and high added value, which have inherent defects and high energy consumption. Consumers' quality requirements for products are: after drying, the product can retain the original color, aroma and taste, and has good rehydration performance, and at the same time, it is relatively low cost.

[0003] Microwave is a kind of high-frequency electromagnetic wave, which has a heating effect of dielectric induction, and can be used for heating, drying, and sterilization of materials. Microwave heating is quite different from ordinary heat transfer. Through...