Food vacuum freeze dryer

The food vacuum freeze-drying machine adopts a combination of water sealed pump and oil sealed pump. In the initial stage, the air is quickly pre pumped by the high-power oil sealed pump group, and the working vacuum is maintained by the low-power Roots water sealed pump group. The food vacuum freeze-drying machine can reduce energy consumption, and the water seal pump can also extract water vapor, avoiding the disadvantages of oil seal pumps due to poor drainage performance, where water vapor emulsifies and deteriorates the pump oil, resulting in unstable vacuum degree in the system.

　　Food vacuum freeze dryerFreeze drying refers to the process of removing water or other solvents from frozen biological products through sublimation. Sublimation refers to the process in which a solvent, such as water, like dry ice, changes from a solid state to a gaseous state without going through a liquid state. The product obtained from freeze-drying is called lyophilizer, and the process is called freeze-drying. Traditional drying can cause material shrinkage and damage cells. The structure of the sample will not be damaged during the freeze-drying process, as the solid components are supported by the solid ice in their positions. When ice sublimates, it leaves pores in the remaining dry material. This preserves the integrity of the biological and chemical structure and activity of the product. In the laboratory, freeze-drying has many different uses, and it is widely used in many biochemical and pharmaceutical applications. It is used to obtain biomaterials that can be preserved for a long period of time, such as microbial culture, enzymes, blood, and drugs. In addition to the stability of long-term preservation, it also retains its inherent biological activity and structure. For this purpose, freeze-drying is used to prepare tissue samples for structural studies (such as electron microscopy). Freeze drying is also used in chemical analysis, which can obtain dried samples or concentrate samples to increase analysis sensitivity. Freeze drying stabilizes the composition of the sample without changing its chemical composition, making it an ideal analytical aid. Freeze drying can occur naturally. Under natural circumstances, this process is slow and unpredictable. Through freeze-drying systems, people have improved and subdivided many steps, accelerating this process.

KFD seriesFood vacuum freeze dryerMainly including: food pre freezing system, drying chamber system, heating system, vacuum system, refrigeration system, material conveying system, media system, pneumatic system, cleaning and disinfection system.

Product Features:

1. The vacuum system adopts a combination of water sealed pump and oil sealed pump. In the initial stage, the air is quickly pre pumped by the high-power oil sealed pump group, and the working vacuum is maintained by the low-power Roots water sealed pump group. It can reduce energy consumption, and at the same time, the water seal pump can extract water vapor, avoiding the disadvantages of oil seal pumps due to poor drainage performance, water vapor causing emulsification and deterioration of pump oil, and resulting in unstable vacuum degree in the system.

2. Heating is a closed water circulation system, which uses a three-way regulating valve to automatically adjust the heat supply of the water circulation system, control the temperature of the heating plate, and automatically regulate the pressure with nitrogen to ensure that the working temperature of the hot water reaches 120 ℃.

3. Adopting rear and bottom mounted water trap, compared with split external cold trap, the passage is shorter, the resistance is smaller, the water vapor passage is designed smoothly, the water capture is uniform, and the water capture efficiency is improved. The water trap adopts the ammonia single cycle refrigeration method, which is more stable and easy to operate compared to the commonly used liquid supply method. Small and medium-sized equipment can use Freon refrigeration, with the supply flow rate adjusted by an expansion valve.

Working Principle:

After starting up, put the materials into the material box for freezing The freezing process of materials involves, on one hand, the vacuum system evacuating and removing a portion of the moisture; On the other hand, when the material is frozen, the moisture contained in certain molecules is discharged onto the surface of the material to freeze. After meeting the freezing requirements, the material is heated and dried by the heating system, and the moisture contained in the material is brought to the freezing capture box for freezing by vacuuming, achieving the freeze-drying requirements of the material.

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