What effect does the high oil mist content in the compressed air have on the operation of the refrigeration dryer

What effect does the high oil mist content in the compressed air have on the operation of the refrigeration dryer

The exhaust oil content of air compressors is different. For example, the exhaust oil content of domestic piston type oil-lubricated air compressors is 65-220mg/m3, and the exhaust oil content of low-oil lubricated air compressors is 30-40mg/ m3, the domestic so-called oil-free air compressor (actually semi-oil-free) exhaust oil content is 6~15mg/m3; sometimes, due to the failure of the oil and gas separator in the air compressor, it will cause the air compressor to exhaust The oil content in the air is greatly increased. After the compressed air with a large oil content enters the refrigeration dryer, a thick oil film will be cast on the surface of the copper tube of the heat exchanger. The heat transfer resistance of the oil film is 40~70 larger than that of the copper tube. This greatly reduces the heat exchange performance of the pre-cooler and the evaporator, and in severe cases, the refrigeration dryer cannot work normally.

　　The specific manifestations are that the evaporation pressure drops but the dew point rises instead, the oil content in the exhaust of the refrigeration dryer is abnormally increased, and the automatic drain is often blocked by oil. In this case, even if the oil removal filter is constantly replaced in the cold dryer pipeline system, it will not help, and the filter element of the precision oil removal filter will soon be blocked by oil. The best way is to repair the air compressor and replace the oil and gas separator filter element so that the exhaust oil content reaches the normal factory index.