Screw air compressor oil emulsion accident in a chemical plant

Screw air compressor in a chemical plant in 2018 - mix oil accident 09 - 29 ( Extensive research testing) A, case background models for LS25S - a in a chemical plant 350 HHWC life of air compressor, oil change processing is carried out in 2015, after oil change equipment lubrication situation did not appear abnormal. In October 2016, the customer reflect the phenomenon of air compressor oil change is thick, and were found in the fuel tank black jelly, hope to analyze the jelly, understand its causes and sources. Second, the detection scheme of jelly infrared component analysis, the results show that the samples of the dimeric linoleic acid/ethylene glycol copolymer. According to the results of infrared spectrum detection, speculated that the compressor may be mixed with alcohols. After communication with the client, the equipment is first used in the oil for some brand for oil, in 2015, the other for oil is used for replacement. Originally used for some brand on PAG ( Poly (ethylene glycol) Synthetic oil and special oil is adopted by the mineral oil in 2015, the two are not compatible, after mixing reacts to generate colloidal material at high temperature. Due to the air compressor oil is at the bottom of the nose is not involved in the loop, also is unable to discharge. Oil change in 2015, the nose part still remain part of the synthetic oil used prior to 2015, this part of the oil and then join system for oil in the nose under the high temperature of reacting, generates' the dimeric linoleic acid/ethylene glycol copolymer jelly. Three, 1 case of revelation, equipment lubrication should choose the suitable lubricating oil. Compared with synthetic oil, mineral oil of high temperature oxidation resistance is poorer than, should not be used for high temperature equipment, must according to the machine and working conditions on site lubricating oil product description for the reasonable selection. 2, equipment in oil processing, thoroughly clean the oil should be paid attention to, especially in some corner position. Such as failing to thoroughly clean, should mix oil experiments before oil change, oil change risk assessment according to the results of the test.