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  • 30 Jul 2019
      Freeze Drying Machine adopts the working principle of cooling condensation, mainly composed of three parts: heat exchange system, refrigeration system and electrical control system. The compressed air first enters the pre-cooler for heat exchange of gas or gas, removes part of the heat and then enters the hot and cold air exchanger and exchanges cold air that has cooled from the evaporator to the pressure dew point for heat exchange to make the temperature of the compressed air Further decrease. After that, the compressed air enters the evaporator and exchanges heat with the refrigerant. The temperature of the compressed air drops to 0-8*C, and the moisture in the air is precipitated at this temperature, separated by the gas-water separator, and discharged through the automatic drainer. The dry, low-temperature air enters the hot and cold air exchanger for heat exchange, and is output after the temperature rises. The Freeze Dry Machine uses physical principles to freeze the moisture in the compressed air below the dew point to make it from the air. Freeze Dry Machine in the precipitation limites to the freezing point temperature of water, theoretically its dew point temperature can be close to 0 degrees. In fact, the dew point temperature of a good freeze dryer is generally about 5 degrees. Traditional drying destroys the cells and causes the material to shrink. The structure of the sample is not destroyed during the freeze-drying process because the solid component is supported by the firm ice on its seat. If the ice sublimes, it will leave pores in the machine in the remaining material, which preserves the biological and chemical structure of the product and the integrity of activity. GuanFeng supplies different kinds of freeze drying machine and Drying Equipment . High quality and favorable price. We′re pleased to get your Inquiry and we will come back to as soon as possible. If you interested in our products, please feel free to contact us any time: Zhejiang Guanfeng Food Machinery Co.,Ltd. Add : South industrial park of Dongguan, Shangyu District, Shaoxing City, Zhejiang Province, China 312352 Freeze Dry Machine :  
    186 Posted by gf machine
  • 22 Aug 2019
      What is Vacuum Freeze Dryer ? Freeze drying is a technique by which material is frozen, then dehydrated by sublimation with retention of form. Sublimation is the process by which the contained water passes directly from a frozen to a gaseous state, avoiding a liquid state completely. In the first step before vacuum freeze drying, the water-damaged articles are quickly frozen. This minimizes the accumulation of ice which can accident the cardboard in water-damaged books, documents. Frozen actual is placed in a exhaustion alcove analysis area the freeze-drying action takes place. The time bare to absolutely dry abstracts varies according to the array of the material, blazon of paper, and the amount of saturation. Exhaustion benumb dehydration does not distort, is noninvasive, and produces no actinic damage. 1. The advantages of freeze-drying: Compared with the usual drying, boiling drying, spray drying and vacuum drying, freeze-drying has the following outstanding advantages. a. Lyophilization is dry at low temperatures, does not denature protein, but can make microorganisms lose their biological activity. This is especially useful for the dry storage of bioactive, biochemical, genetically engineered, and blood products that have poor thermal stability. b. During low-temperature drying, the growth of microorganisms and the enzyme's action are almost impossible to process, thereby maintain the original properties of the material. c. After drying, the volume and shape are basically the same, the material is sponge-like, no shrinkage, and the contact surface with water after rehydration is large, and can quickly return to the original shape. d. Due to the fact that it is usually dried under vacuum, there is very little oxygen and the easily oxidized substances are protected. e.Can remove 95% to 99.5% of water in the substance ,the finished product has long shelf life . More information click gf-machine or  
    158 Posted by gf machine
Business 202 views May 25, 2019
Precautions For Dried Fruit Processing


The fruit is processed into dried fruit, which is carried on both sides and can be different from the flavor and taste of the fruit, and try to maintain the original nutrients. Let's take a look at how to process the dry process with the manufacturer of the Guanfeng Fruit Processing Machine .

First, the process

Raw materials → washing → peeling → slicing → immersion in syrup → drying → selection → packaging

Second, the operation points

1. Raw materials: The fruit is fresh and full, the quality is good, more than eight mature, the seeds are brown, the tissue does not shrink, no mold, deformity, frostbite, pests and diseases and serious mechanical injuries.

2. Washing: Rinse the raw materials with running water to rinse off the residues and impurities on the fruits.

3. Peeling: The raw materials are mechanically (also artificially) uniformly removed from the fruit skin, and the cracked and speckled parts are removed.

4. Slicing: The fruit that has been peeled is then punched into a circular hole along the center of the core by a nuclear machine, and then cut into annular pieces along the transverse direction of the fruit by a microtome.

5. Potion soaking: The fruit pieces are placed in the syrup for 30 to 40 minutes. When immersing, the liquid level of the syrup should be higher than that of the fruit slice. To prevent the fruit piece from floating on the syrup, it should be pressed on the fruit piece with the curtain weight to ensure that the fruit piece is completely immersed in the syrup.

6. Drying:

a drying chamber temperature: 60 ~ 80 ° C.

b drying time: 5 to 10 hours.

c Drainage: Always drain during the drying process.

d During the drying process, it is necessary to prevent the temperature from becoming unstable and fluctuating.

7. Selection: Dried fruit dried fruit should be manually selected and trimmed.

a trimming: trimming the fruit pieces with residual seed nests, peels, mechanical scars, spots, pests, and diseases.

b selection: remove the water pieces (not dried pieces), paste pieces, chips, and dirty pieces in the fruit pieces, and remove impurities.

8. Packing: Dehydrated fruits that have passed the test and inspection are packed into a composite packaging bag for packaging.

GUANFENG is specialized in manufacturing vegetable drying machine and Vegetable Drying Machine . Base on experienced research and development engineers team and professional production team in the food processing industry, in addition to provide high quality equipment, we also provide the overall food processing solution. If you interested in our products, please feel free to contact us by click