Quick-freezing agent as well as preparation method and use method thereof

Abstract

The invention discloses a quick-freezing agent as well as a preparation method and use method thereof, and belongs to the technical field of heat transfer materials. Prepared saturated brine is uniformly mixed with ethanol of which the concentration is 90%-98% and glycerol according to certain proportions, so as to prepare the quick-freezing agent disclosed by the invention; and then, the quick-freezing agent is put in a quick freezer, the quick-freezing agent is cooled to the minimum temperature of -45 DEG C according to needs by virtue of an evaporator of the quick freezer, and then, materials are put in the quick-freezing agent so as to be frozen. The quick-freezing agent provided by the invention can be used for efficiently and quickly freezing the materials; under the same conditions, compared with cold air flow for quickly freezing food, the quick-freezing agent serving as a cold source for quickly freezing food has the advantage that the required time of the cold source passing through 0 DEG-5 DEG C in a freezing process is short; and ice crystals formed in the frozen food are small, and the damage to cell tissues of the food is small, thereby ensuring the quality of the food.

Description

technical field [0001] The invention relates to the technical field of heat transfer materials, in particular to a quick-freezing agent, a preparation method and a use method thereof. Background technique [0002] Quick-frozen food is food processed by rapid low temperature (below -18°C), the water and juice in the food tissue will not be lost, and at such a low temperature, microorganisms will basically not reproduce, and food safety is guaranteed. [0003] With the improvement of people's income level and the quickening pace of life, my country's quick-freezing industry has grown rapidly. Since the 1990s, the annual output has increased by more than 20%, and it has become a new star in the food industry. [0004] At present, food quick-freezing mainly adopts two methods: spiral quick-freezing machine and liquid nitrogen quick-freezing. Among them, the main body of the conveying system in the spiral quick-freezing machine is a spiral tower. The cold air sent by the convect...

AI Technical Summary

Problems solved by technology

However, in the process of quick-freezing food using liquid nitrogen technology, it is easy to cause frostbite to personnel, and liquid nitrogen is expensive, and storage requires specific storage containers, resulting in high costs

Moreover, due to the extremely fast freezing speed of liquid nitrogen, there will be a large instantaneous temperature difference between the surface and the center of the food, and the expansion pressure will be large, resulting in low-temperature fracture, destroying the organizational structure of the food, and adversely affecting the quality of the food.