The freezing dryer applies the physical principle to freeze the moisture in the compressed air below the dew point, so that it can be separated from the air. It is simply understood as cooling water. However, due to the freezing point temperature of water, theoretically, the dew point temperature of the refrigerated dryer can be close to 0 ℃, but not reach 0 ℃.

After the compressed air flows into the evaporator, it exchanges heat with the refrigerant through the heat exchange function of the evaporator. The heat in the compressed air is taken away by the refrigerant, and the compressed air cools rapidly. The moisture in the moist air reaches the saturation temperature and condenses rapidly. The condensed moisture forms water droplets after condensation. After separation, the water is discharged from the automatic drain valve.

The dew point of the air pressure treated by the refrigeration dryer can be as low as 2 degrees. The air with this dew point can basically meet the requirements of general equipment for gas moisture content. If the gas with a lower dew point is required, an adsorption dryer is required.

According to the corresponding relationship between the saturated steam pressure and temperature of water, the freezing dryer uses the refrigeration device to cool the compressed air to a certain dew point temperature, release the contained water, and discharge the water through the steam water separator and electric drainer, so as to dry the compressed air.

● Ensure the normal operation of the equipment at the ambient temperature of 50℃;

● 0.5-80 cubic meters use environmentally friendly refrigerant; use a three-in-one plate or plate-fin heat exchanger, collecting three functions of the regenerator, the evaporator and the gas-liquid separator , with good heat exchange effect, compact and beautiful structure; modular refrigeration components. Convenient for disassembly and repair, strong replaceability;

● The refrigeration compressor adopts DANFOSS, FUSHENG, PANASONIC, BTZERO, COPELAND, HIGHLY, etc. fully enclosed or semi- enclosed refrigeration compressors, which have stable operation, low noise, high COP, reliable performance, and long power- saving life;

● Refrigeration control components adopt the world's advanced refrigeration components like DANFOSS, EMERSON, SPORLAN and other companies;

● Real-time display of operating parameters;

0.5-12Nm³/min, 100-600Nm³/min optimization scheme of high temperature air inlet equipment.

Cause Analysis of Water Content in Compressed Air

Many users who have requirements for the water content of compressed air have adopted dryers, but in many cases, water is still analyzed. Why? The reasons for incomplete water removal of compressed air after the dryer are analyzed based on some actual conditions:

1. Most of the liquid water in the compressed air is trapped by the air receiver. The cold dryer and heatless regeneration dryer can only handle the remaining small amount of water in the gaseous state. In fact, it can be said that "the air receiver is the most important and main compressed air drying equipment".

2. However, only liquid water can be separated from the air receiver, and only when the compressed air is cooled to a certain temperature (pressure dew point temperature) can more water be separated from the air receiver. Therefore, the aftercooling effect of the air compressor has a great impact on the water content of the compressed air, and the water content of the air is low when the exhaust temperature is low.

3. The pressure dew point of the lyophilizer must be 10 ℃ lower than the ambient temperature, but the optimal pressure dew point of the lyophilizer is 4 ℃, because at 4 ℃, the proportion of water is the largest, which is the easiest to separate, and will not lead to ice blockage.

4. In principle, the heatless regenerative dryer can only handle gaseous moisture, that is, water vapor. A large amount of liquid water enters the heatless regenerative dryer, which will seriously affect the performance of the machine.

Air dryer machine

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