Piston air compressors use two grades of compressor oils, No. 13 (HS-13) and No. 19 (HS-19), which are based on petroleum lube fractions and solvent. Special lubricants produced by processes such as dewaxing, refining and clay treatment. Most of the lubricating oil is injected into the lubrication points of the cylinder and the packing by the pressure oil injector. Under high temperature and high pressure conditions, the mist particles which are scattered into different sizes enter the cooler, and most of the oil is mixed with the condensed water in the cooler. The beads can be repolymerized in the form of oil in the form of oil, and a few refined oil mists form a dispersed oil or an emulsified oil. The emulsification is mainly for mechanical reasons, but since the lubricating oil itself still contains a very small amount of surface active substances, such as naphthenic acid and its salts which are not removed during the refining process, the carboxylic acid produced by oxidation and corrosion during use and Salts, as well as metal chips generated by mechanical wear. Therefore, emulsification caused by chemical reasons cannot be excluded.
According to the actual measurement, in the oily wastewater of the air compressor, the specific gravity of the oil is 0.9, and the content of the oil slick is more than 99%. If the oily wastewater in the air compressor intercooler, aftercooler and gas storage tank is not removed in time, it will form carbon in the form of oxidation and condensation, which may become one of the indirect causes of fire and explosion, such as direct discharge into the sewer. Polluted water bodies. Therefore, the timely treatment and elimination of oily wastewater can ensure the safe production of air compressors and prevent pollution of the environment. In the past, oil-containing wastewater from air compressors generally used waste oil collectors or borrowed from other oily wastewater treatment methods. However, because the characteristics of the wastewater were not considered, the treatment effect could not meet the requirements.
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