Recycling of compressor oil

Under normal circumstances, after being regenerated, used oil is best not used in compressors; it can be applied to less critical machinery such as Roots blowers.

Reply to 1# dqllgm: There are two types of oil used in compressors. One is for the circulating lubrication of the moving parts (crankshaft, connecting rods, crossheads, slideways, etc.), and this lubricating oil is called machine oil； Second is the pressure lubrication of the working components (cylinders, pistons, piston rings, etc.). The lubricating oil used for this purpose is called compressor oil, and the performance specifications of these two types of lubricants are different. Mechanical oil used for circulating lubrication is easier to handle; it does not reach high temperatures in applications, its components do not undergo chemical changes, and it generally consists of water and trace impurities. Compressor oil used for pressure lubrication is exposed to high temperatures in the cylinders, causing changes in some of its components, such as viscosity and acid value. Therefore, when treating these two types of oils, it is important to note that they must be recovered separately and not mixed together ； Second, it must be recycled separately. The treatment generally follows a sequence of precipitation, heating, filtration, acidification, decolorization, re-precipitation, and re-filtration. The purpose of precipitation is to remove water and impurities initially ； Heating is used to remove water from the oil ； Acidification is used to adjust the pH value of oil ； Decolorization involves using decolorizing agents such as clay to remove the blackness from oil, restoring its normal color ； Filtering is the removal of tiny impurities from oil. Many factories now have oil treatment processes for treating machine oil, compressor oil, refrigeration oil, etc. Under normal circumstances, the treated recycled oil meets the required standards and can be reused. Sometimes, as a precaution, recycled oil is used to lower the required standards; for example, compressor oil is used in place of mechanical oil, while mechanical oil is employed as a circulating lubricant for ordinary power equipment such as water pumps.