The harm caused by water in the compressed air is mainly manifested in: the condensed water on the pneumatic equipment will take away the lubricating oil, resulting in reduced efficiency or even damage to the equipment. Condensed water will also accelerate the wear of valves in the pipeline, causing failure or misoperation of pneumatic control equipment; corrosion of pipelines and equipment, and if water freezes at the low point of the pipeline, the pipeline may burst. If the compressed air used for spraying contains water mist, it will affect the adhesion of the paint on the workpiece, resulting in the failure of the paint. the

Analysis of several causes of water in compressed air and solutions

(1) The water in the gas mixes with the lubricating oil during the compression process, which will reduce the lubricating performance and increase the abrasion of the machine parts. It will not only cause poor sealing but also cause the lubricating oil to deteriorate and emulsify in the filler for rubber circulation lubrication. the

Solution: Check the gas-water separator regularly, and discharge the condensed water in time if there is a fault such as blockage. If the gas-water separator is not drained in summer when the air humidity is high, check and deal with it immediately. the

(2) There is water in the air supply system. When the temperature is lower than 0 degrees, the water will freeze on the inner wall of the air duct. Similarly, reducing the diameter of the pipe will sometimes even cause individual pipes to freeze completely, hindering Work. the

Solution: For the phenomenon of icing on the inner wall of the air duct in the air supply system, when the compressed air is discharged after the subsequent start-up operation, the thin ice on the inner wall of the air duct will melt and evaporate into water due to the high temperature of the compressed air, and the water will be blown out of the air duct along with the air . For the phenomenon that the pipeline is completely frozen, we should check the air duct regularly, and do a good job of waterproofing and rainproof when the air compressor is out of use. In the case of low temperature in winter, wrap the air supply pipe with thermal insulation material to protect the air pipe and prevent the inner wall of the air pipe from freezing.
the
(3) The adsorption material used in the adsorption dryer is activated alumina. If the filling is not tight, it will rub and collide with each other under the impact of strong compressed air, resulting in powdering. Powdering will make the gaps of the adsorbent larger and larger, and a large amount of The compressed air passing through the gap is not effectively treated, which eventually leads to the failure of the dryer. This problem is manifested in the field as a large amount of liquid water and slurry in the dust filter. the

Solution: When filling activated alumina, fill it as closely as possible, and check and replenish it after a period of use. Replace the oil separator core and post-oil filter element on time to ensure complete oil-gas separation of the air compressor and good oil removal by the post-oil filter. In addition, the super coolant in the unit must not be excessive.

(4) The air humidity changes greatly, and the drainage frequency and drainage time of each timing drainage valve are not adjusted in time, which will make more and more water accumulate in each filter, and the accumulated water can be brought into the compressed air again. the

Solution: The drainage frequency and time of the timing drainage valve can be set according to the air humidity and experience. The air humidity is high, the frequency of drainage should be increased, and the drainage time should be increased at the same time. The adjustment standard is to observe that the accumulated water can be drained without discharging compressed air every time.

So we can use the air compressor dryers and compressed filters to remove the water.


Lingyu Machinery - water removal high precision coalescing compressed air filter