Why the exhaust temperature of the four-ring lyophilization experimental lyophilizer is high

Four-ring lyophilization experimental lyophilizer is suitable for drying dehydrated vegetables, food, fruits, chemicals, pharmaceutical * intermediates and other materials
.

Freeze vacuum drying is a vacuum lyophilizer will be refrigeration system, vacuum system, heat transfer oil heating system, moisture drainage system combined into one, the introduction of a new type of box structure, the use of the box storage material space for drying freeze vacuum drying
.

The vacuum freeze-drying of the lyophilizer is the drying method
of the aqueous substance, after pretreatment, in the rapid freezing and vacuum environment of -30 °C, so that the water in it is sublimated from the solid state to the gaseous state to remove the moisture and preserve the substance.

Dryers are widely used and used frequently, so it is important for enterprises to use them normally
.

Long-term work will bring wear and tear to accessories and cover with impurities such as dust and affect the work
.

The working principle of the four-ring lyophilization experimental lyophilizer: liquid → solid → gaseous process
.

During the lyophilization process, the "liquid bridge" between the solute particles has been frozen into a "solid bridge", the relative position between the two particles has been fixed, and there is no surface tension at the gas-liquid interface between the two particles
.

With the continuous sublimation of the solvent, the "solid bridge" continues to decrease, but the relative position between the two particles no longer changes until the "solid bridge" disappears
completely.

Reasons for the high exhaust temperature of the lyophilizer: The exhaust temperature of the air compressor head overhaul lyophilizer is sometimes abnormal, it may be: (1) the compressed air temperature is too high or the flow rate is too large; (2) The working conditions of the refrigeration system change.
Causes the evaporation temperature of the Ling medium to rise, so that the amount of compressed air in the evaporator cannot be cooled enough; (3) The heat dissipation on the outer wall of the precooler pipe is too large
.