The cold trap is a device for capturing moisture in the freeze-drying process. Theoretically, the lower the temperature of the cold trap, the stronger the water trapping ability of the cold trap, but the lower the temperature of the cold trap, the higher the cooling requirement, the higher the machine cost and the running cost. The cold trap temperature of the experimental series freeze dryer mainly has several grades of -55 °C and -80 °C.
Freeze-drying at -55 °C is suitable for some freeze-dried products. Freeze-drying at -80 °C is suitable for lyophilization of some special products.
The effect of cold trap temperature on water-trapping capacity shows that the temperature of the cold trap drops from -35 °C to -55 °C, and the water-trapping capacity is improved significantly. The cold trap temperature is lower than -55 °C, and the water trap capacity of the cold trap is not significantly improved.
Therefore, in the absence of special needs, the choice of cold trap temperature -55 ° C is the ideal choice.
Post time: Mar-23-2023
