Damage caused by moisture in compressed air is mainly expressed as:
Condensation on pneumatic equipment removes lubricating oil, leading to reduced efficiency and equipment damage. Condensation also accelerates the wear of valves in pipelines and causes pneumatic control devices to fail or malfunction. Corrosion of pipelines and equipment, as well as water freezing at the bottom of pipelines, can cause pipelines to burst. If the compressed air used for spraying contains water mist, the adhesion of the paint to the workpiece will be impaired, resulting in coating defects. of
Analysis and solutions for multiple causes of moisture in compressed air
(1) Moisture in the gas mixes with lubricating oil during the compression process, reducing lubricating performance and increasing wear of mechanical parts. This not only reduces the sealing performance, but also deteriorates the lubricating oil and causes it to emulsify in the rubber circulating lubricating filler. of
Resolution:
Check the air-water separator regularly and B. there is a blockage. If the steam separator does not empty during the summer when the humidity is high, check it and remove it immediately. of
(2) There is water in the air supply system. When the temperature drops below 0 degrees, the water on the inner wall of the air duct freezes. Likewise, reducing the pipe diameter can even cause individual pipes to freeze completely, hampering work. of
Resolution:
The freezing phenomenon on the inner wall of the air duct in the air supply system is a phenomenon in which the thin ice on the inner wall of the air duct melts and evaporates into water when the compressed air is discharged after the subsequent startup process. The temperature of the compressed air rises and water is mixed with the air blown out from the air duct. For the phenomenon that the pipeline is completely frozen, the air duct should be checked regularly, and the waterproof and rainproof should be properly done when the air compressor is not used.
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(3) The adsorbent of the adsorption dryer is activated alumina. If the filling is not tight, it will rub and collide under the influence of powerful compressed air, causing powder. Due to pulverization, the gaps in the adsorbent become larger and larger, and the large amount of compressed air that passes through the gaps cannot be treated effectively, eventually leading to the failure of the dryer. Resolution:
When filling with activated alumina, fill as tightly as possible and check and refill after a period of use. Replace the oil separator core and post oil filter element in time to ensure complete oil-gas separation in the air compressor and good oil removal by the post oil filter.
(4) Humidity changes greatly, and the drainage frequency and drainage time of each timed drain valve cannot be met, so that each filter will accumulate more and more water, and the accumulated water may enter the compressed air again. of
Resolution:
Draining frequency and time of the timed drain valve can be adjusted according to humidity and experience. If the humidity is high, drain more frequently and at the same time lengthen the drain time. As a guideline for adjustment, make sure that accumulated water can be discharged each time without removing the compressed air.
