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The Shanghai Yetuo pilot freeze-drying machine is relatively capable of processing more samples and has more complete functions compared to the small-scale freeze-drying machine. Our company's designed Yetuo pilot freeze-drying machine has more functions than the small-scale freeze-drying machine. All pilot freeze-drying machines have plate temperature control function, which is more accurate in temperature control and controllable in sublimation process to prevent material waste. The process exploration adopts manual mode for manual exploration and setting, and the efficient automatic mode runs mature processes with high efficiency and beautiful appearance.
working principle:
It is based on the principle of refrigeration and dehumidification, using a fully enclosed compression refrigeration system to cool and reduce the temperature of the compressed gas discharged by the air compressor, so that a large amount of saturated water vapor and oil mist condensed droplets contained in it are separated into steam and water and discharged by an automatic drain. The saturated compressed gas at a higher temperature enters the pre cooler of the refrigeration dryer, where it exchanges heat with the dry and cold gas from the evaporator. After the temperature is reduced, it enters the evaporator of the refrigeration system and undergoes a second heat exchange with the refrigerant vapor, so that its temperature drops to near the evaporation temperature of the refrigerant. During the two cooling processes, the water vapor in the compressed gas condenses into liquid water droplets and enters the gas water separator with the airflow. The separated liquid water The dry compressed gas with lower temperature is discharged outside the machine through an automatic drain and enters the pre cooler, Heat exchange is carried out with the newly entered wet saturated gas to increase its own temperature, thereby obtaining a dry compressed gas with low water content and relative humidity at the exhaust port of the refrigerated dryer. Due to its reliable operation, convenient management, and low operating costs, refrigerated dryers have become the preferred model for air compressor station purification equipment in various industries.
Classification of Shanghai Yetuo Pilot Freeze Drying Machine:
1. The freeze-drying machine of Shanghai Yetuo Experimental Series is used for research and development purposes. The freezing amount of the cold trap is generally less than 6 kilograms per batch, and the plate area of the drying chamber is less than 0.2 square meters;
2. The Shanghai Yetuo pilot and small-scale production series are used for simulating freeze-drying processes in pilot tests and small-scale production. The freezing capacity of the cold trap is generally between 6-25 kilograms per batch, and the plate area of the drying chamber is between 0.2-2.0 square meters;
3. The freeze dryer series produced by Yetuo Industrial is used for large-scale production in factories. The freezing capacity of the cold trap is over 40 kilograms per batch, and some even reach over 1000 kilograms. The plate area of the drying chamber is over 2 square meters, and some even reach around 100 square meters.
The basic process of freeze-drying with Shanghai Yetuo pilot freeze-drying machine:
1. Pre frozen material: Freeze all liquid water in the material into ice crystals;
2. Sublimation drying: Turn on the vacuum pump to make the material plate in a vacuum state. If bubbles are found on the surface of the material, it indicates that it has not been pre frozen and must be re pre frozen; Run the preset freeze-drying process and let the machine automatically run the entire freeze-drying process;
3. End drying: First, turn on the vacuum pump to balance the pressure inside the drying chamber with the outside, then turn off the vacuum pump and remove the dry product;
4. Melt the water captured in the cold trap and let it flow out through the drain valve, then wipe the inner wall of the drying machine to ensure that no liquid remains inside.
