Freeze-dried food market will reach 4.2 billion yuan by 2025

In recent years, the demand for freeze-dried food in the international market has increased year by year

The industrial market grows wildly

In recent years, consumers' choices of snacks have become increasingly diversified.

Taking the largest proportion of freeze-dried fruit as an example, freeze-dried fruit, as a healthy food, can not only solve the economic problems of fruit planting, but also meet the diversified needs of consumers

Data shows that in 2020, China's freeze-dried food market will exceed 2.

Freeze-dried food in China is divided into fruits, vegetables, convenience foods, meat, aquatic products and other categories, among which fruits and vegetables are the main ones

From the perspective of the types of freeze-dried food demand, fruit freeze-dried food is the category with the largest demand for freeze-dried food in China, accounting for 39.

China started the development of food freeze-drying technology and freeze-drying equipment in the early 1990s.

The introduction of freeze-drying technology in China has not been long, but its development momentum and potential are considerable

Processing technology has obvious advantages

The reason for the rapid growth of freeze-dried products is that the special treatment process of freeze-drying can maximize the preservation of the color, aroma, nutrients, and appearance of the original fresh food

Taking freeze-dried fruit as an example, freeze-dried fruit adopts the vacuum freeze-drying method of freeze-drying machine to freeze the water in the fruit in advance, and then sublimes the frozen water in a vacuum environment, so freeze-dried fruit preserves the original Color, flavor, nutrients and the appearance of the original materials, and have good rehydration, and without any additives, freeze-dried fruit can be stored for a long time without deterioration

Experts said that freeze-drying technology is gradually applied from the field of pharmaceutical and biological products to the deep processing industry of food and agricultural and sideline products

Taking coffee, fruit juice, tea and other beverages as an example, freeze-dried beverages can not only retain nutrients to the greatest extent, but also have the advantages of convenient portability and good instant solubility.

Production equipment is becoming more and more mature

　　With the widespread application of food freeze-drying technology, the development of food freeze-drying machines has become more and more mature

　　The most important equipment for freeze-dried food production is the vacuum freeze-drying unit for food.

　　There are two main forms of drying box, cylindrical and square, each with its own advantages.

　　Most of the heating systems use radiation heat transfer, the radiant plate is made of anodized aluminum, the heat transfer medium includes heat transfer oil, saturated water, secondary steam, organic solvents such as propylene glycol, glycerin, etc.

　　The vacuum system adopts mechanical vacuum pump, including roots pump + oil seal pump and roots pump + atmospheric jet + water ring pump.
The main difference between the two is that the former cannot pump water vapor, so the water vapor trap (also known as cold trap) High efficiency requirements, the advantage is low energy consumption, the latter is just the opposite, can suck a small amount of water vapor, the disadvantage is that the energy consumption is large
.

　　The refrigeration system is composed of a refrigeration unit and cooling pipes.
The cold trap is placed at the bottom of the radiant panel assembly according to its relative position to the radiant panel assembly, including the bottom type, which is placed at the bottom of the radiant panel assembly; It is placed behind the radiant panel assembly; the other type, which is not in the same container as the radiant panel assembly, is placed in another container, and the two containers are connected by a short and thick pipe
.

　　The control system has two categories: manual control and automatic control.
Automatic control is divided into two categories: instrument automatic control and PLC programmable control
.
The PLC programmable control is the most advanced, and now there is a dedicated freeze-drying program controller, which is designed on the basis of PLC according to the requirements of freeze-drying, which can automatically complete the complex control operations in the freeze-drying process, and has a data storage device.
function
.

　　(Comprehensive arrangement by Qu Yuening)

　　"China Food News" (08 edition on March 02, 2022)

　　(Editor-in-charge: Qu Yuening)