In modern enterprises, the use of compressed air is becoming more and more common, and the two main types of common compressed air dryers are adsorption dryers and refrigerated dryers. What are the differences between refrigerated dryers and adsorption dryers?

1. The difference in working principle

refrigerated dryer is based on the principle of freezing and dehumidification, the saturated compressed air from upstream through the heat exchange with the refrigerant cooling to a certain dew point temperature, condensing a large amount of liquid water, separated by the gas-liquid separator automatically discharged from the machine, so as to achieve the purpose of dehydration and drying. The suction dryer is based on the principle of variable pressure adsorption, the saturated compressed air from upstream will be adsorbed in the desiccant under a certain pressure after contact with the desiccant, and the dry air will enter the downstream work, so as to achieve the purpose of deep drying.

1. The difference in water removal effect

The dew point temperature is usually 2~10℃. Suction dryer is not required to pass the temperature change, and the desiccant (alumina) can be dried in depth, so usually its outlet dew point temperature can reach -20℃ or below, that is to say, it can reach deep drying.

1. The difference in energy loss

For the refrigerated dryer, because it is necessary to compress the refrigerant to achieve the purpose of cooling, so the power supply power will be high. But the adsorption dryer because as long as the valve is controlled through the electric control box, so usually only a few dozen watts of power, that is, there will be no power loss.

1. The difference of gas loss

Because the refrigerated dryer is to achieve the purpose of water removal by changing the temperature, and the water is discharged from the machine through the automatic drain, so there is no loss of gas volume. On the other hand, because the desiccant needs to be regenerated after saturated with water, it needs to have about 12-15% of regenerative gas loss.

1. The difference of failure rate

Because the refrigerant system and air system of refrigerated dryer including the electrical part are relatively complicated, while the suction dryer only has the possibility of failure because the valve has to move frequently, so the failure rate of suction dryer is usually lower than that of refrigerated dryer.

In general, the suction dryer is better than the refrigerated dryer both in stability and in effect, just because it needs to lose a certain amount of re-gas, where we generally ask customers to make a choice after weighing the pros and cons. But now more and more manufacturers have chosen suction dryer, and it should be said that this is gradually becoming a trend.

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