Causes of poor drying performance of adsorption air dryers
1、 Incorrect selection of air dryer
Many companies have high requirements on the quality of compressed air, but they use a refrigerated air dryer and a double tower adsorption type air dryer to dry the compressed air. Measure the quality of compressed air, mainly depends on the content of moisture in the compressed air, which is the pressure dew point value. The lowest pressure dew point of a refrigerated air dryer can only reach 10°C, and it is impossible to meet the requirements for pneumatic components. At this time, many companies will choose adsorption air dryer to reduce the pressure dew point, but in use, the drying effect will still be worse. Jiangsu Jiayu JRR series waste heat regeneration air dryer is a new generation dryer designed on the basis of adsorption air dryer, which is more efficient and energy-saving.
2. The intake air temperature of the compressed air is too high.
Some air dryers are sensitive to the temperature of the compressed air and need to be at 35°C to reach the desired pressure dew point. Check the cooling effect of the cooler at the rear of the air compressor so that the temperature of the air entering the dryer is ≤ 45°C.
3, desiccant drying effect is not good.
The drying effect of the air dryer is optimal at the initial stage of use, but as the time passes, the desiccant slowly pulverizes due to the long-term use of the desiccant. In particular, the desiccant in the double tower adsorption air dryer will also have a tunneling effect, which is even more unfavorable to the adsorption of the adsorbent. In this case, the desiccant needs to be replaced in time. Adsorbents are contaminated to degrade performance. Air filter oil pollution is not complete, replace the filter element and replace the adsorbent.
Excessive processing volume. Should be adjusted according to the dryer's rated throughput.
Inlet pressure is too low. Check if the air compressor is faulty and adjust to an outlet pressure of 0.7Mpa.
Poor reproduction. The regeneration gas volume is small, the regeneration time is appropriately extended, the regeneration exhaust gas resistance is large, and the muffler is cleaned.
Electrical system failure, valve action is not correct. Check that the PLC (Program Controller) operates according to the specified action.