Can the black hydraulic oil be used after being filtered and purified?
December 16, 2021
It is normal for the lubricating oil to darken slightly after using it for a period of time, but it should not become very dark. The blackening of the oil may be caused by the oxidation and deterioration of the lubricating oil, even the production of coke, or the result of excessive wear debris on the parts.
In the process of use, even if the particulate impurities do not exceed the standard, the black lubricating hydraulic oil should not be used in the oil tank, otherwise it will cause mutual contamination and deterioration of the oil, and the oil should be replaced or filtered.
The use of blackened lubricating oil and hydraulic oil has many hazards. For example, after the lubricating hydraulic oil that has been contaminated by impurities enters the oil tank, the constant friction with the moisture particles will accelerate the aging of the oil, which will cause serious damage to the quality of the lubricating oil and aggravate the machinery. The wear and tear of equipment is about to cause greater losses.
Dealing with darker or slightly darkened lubricants must be determined according to the quality of the oil. First, analyze the reasons for the darkening of the oil, and then prescribe the right medicine. If it is caused by the aging of the oil or the loss of chemical additives, then the technology can not improve the color through the purification and filtration of the oil filter. According to the experience of oil speed cleaning, this requires auxiliary addition of adsorbents to absorb the colored substances in the oil and improve the oxidized substances. After recycling, it can be reused again. If it is mainly caused by mechanical particle impurities, it can be solved by equipment with ordinary filtering function. The judgment method is very simple. After a long time of standing, there is no layering of the oil, which shows that it is caused by mechanical particles and it is relatively easy to handle. However, if the oil of lubricating oil or hydraulic oil becomes extremely black and has reached the scrap level, no matter what method is adopted, it cannot be purified and solved. Only by using waste oil smelting or distillation equipment to restore it to Base Oil or Diesel oil is reused after the second blending.
