Features of vacuum freeze drying technology:

 

Vacuum freeze-drying technology, also known as enhanced drying, is to freeze water-containing materials in advance and then increases their moisture in a vacuum state. The original biological and chemical properties of the freeze-dried articles remain unchanged, and they are easy to store for a long time. After adding water, they can be restored to the state before freeze dryer for vegetables and can maintain their original biochemical properties. Therefore, small freeze dryer for food is widely used in medicine, food, chemical industry, biological products and other fields.
 

 

 

The operation process of vacuum freeze drying:

 

1. Before starting the machine, check the connection of the power supply and whether the fixed position of the drum is correct. Connect the power supply, open the upper cover, turn on the motor switch, and let the drum run idly. In the same direction, turn on the heating wire and work for 5 minutes, but still, no hot air is discharged, stop the machine to check whether the heating wire exhaust port is blocked.

2. The cover should be lowered during the drying operation, and the workpiece should be stopped when loading and unloading. Note that the workpiece should be evenly distributed in the drum, otherwise the centrifugal force will not be parallel, which will cause the dehydrator to swing strongly. The workpiece loaded in the drum should not be overloaded or overfilled. If the dried workpiece has a high density of fine particles or is easy to store liquid, first centrifuge and dry it for 1-2 minutes, take out the rotating drum, turn the workpiece over, and perform heating and centrifugal drying to achieve satisfactory results.

3. To stop the drum, first turn off the motor, and then step on the brake pedal with your foot, but remember that the motor cannot be turned off for braking. The dehydrator can be centrifuged and dried independently without heating, but the motor cannot be turned off for heating and drying alone.

4. Before using the dehydrator, you should read the manual and understand the operating principle. In order to ensure safe production, the dehydrator should be checked and maintained frequently, and high-quality lubricating grease should be added to the bearings regularly to keep the dehydrator in good condition.

 

How is food freeze-dried?

 

Water absorbs heat and can become steam, and ice absorbs heat can also become steam. The former is called evaporation, and the latter is called sublimation. Drying is evaporative dehydration; freeze dryer for vegetables is sublimation dehydration. After the water-containing food is quick-frozen, under vacuum and proper heating conditions, the water in the food can be sublimated and removed, thereby obtaining freeze-dried food.
 

 

 

Do different freeze-dried foods use the same sublimation process?

 

Due to different materials, different shapes after post-processing, different moisture content, and different loading amounts, the sublimation process used will naturally not be the same. In order to obtain a better sublimation process, a small experimental machine is generally used for experiments and then put into production.

After the fresh agricultural products are harvested, freeze-dried food is made by freeze drying flowers equipment. On the basis of not destroying the organizational structure, the agricultural products can retain the original color, aroma, taste, shape and most of the business, and can be stored for a long time. Today, a wide variety of freeze-dried agricultural products continue to enter the market, and the development momentum is rapid.

The emergence of freeze-dried agricultural products not only provides consumers with more choices, but also provides more possibilities for the food processing industry. The processing of agricultural products through small freeze dryer for food increases the added value of products, brings new growth, promotes the sustainable development of products, and provides new ideas for many food processing enterprises.

Relevant forecasts show that the domestic freeze-dried food market will reach more than 4 billion yuan by 2025. In the future, the application of freeze dryer for vegetables in instant food, snack food, health food ingredients, military food, etc. will grow rapidly.

However, compared with the good market prospects, how to choose a vacuum freeze-drying equipment that can quickly carry out production and is suitable for the process characteristics of freeze-dried food has become a problem that many enterprises need to face. For such problems, Bo Yikang has already taken action. In view of the characteristics of freeze-dried food production, the company has continuously optimized its freeze drying flowers equipment, and launched a series of freeze-drying equipment suitable for food enterprises to quickly carry out freeze-dried food production.

 

Advantages of freeze-dried food:

 

Due to the production under low temperature and low pressure conditions, the decomposition or oxidation of certain ingredients in the food material is prevented, and the harmful effects of microorganisms and enzymes are inhibited, thereby maintaining the freshness and nutritional content of freeze-dried food.

During the sublimation process, water is gradually removed from the surface to the inside in the molecular state, without destroying the tissue structure of the food, without taking away natural pigments and aromatic substances, so the shape, color and taste of small freeze dryer for food are almost the same as fresh products. .

During the sublimation process, the ice crystals in the food form tiny pores like sponges, so the freeze drying flowers equipment can absorb water and recover quickly after being immersed in water, just like fresh food.

Since it has been washed and cut and rehydrated very quickly, it is extremely convenient to eat or cook directly.
 

 

 

Freeze-dried foods:

 

Almost all foods with water can be freeze-dried, but some foods with high sugar or gum content and foods with too low eutectic point temperature are relatively difficult to freeze-dry.

Various types of foods that can be freeze drying flowers equipment, such as the following:

Vegetables: chives, carrots, garlic, onions, ginger, peppers, yams, spinach, cauliflower, green beans, edible fungi, etc.

Fruits: apples, peaches, pears, apricots, red dates, strawberries, bananas, pineapples, cantaloupe, etc.

Meat: beef, mutton, pork, chicken, snake meat, turtle, etc.

Aquatic products: fish fillets, shrimps, crab meat, cuttlefish shreds, whitebait, etc.

Convenience food categories: instant noodle accessories, beef noodle accessories, meatballs, soup, pet feed, etc.

Instant beverages: coffee, milk, soy milk, fruit juice, royal jelly, etc.

Medicines: deer antler, deer blood, earthworms, scorpions, turtles, ginseng, Codonopsis, angelica, rhubarb, various health foods, etc.