Take lubricating oil purifier as an example
Lubricating oil vacuum purifier mainly treats unqualified mechanical oil, hydraulic oil, compressor oil, refrigeration oil and other industrial oils. It can quickly and effectively remove water, gas, impurities and volatile substances (such as alcohol, gasoline, ammonia, etc.) from the oil, restoring the oil's viscosity, flash point, and performance. The treated lubricating oil has low emulsification value, extremely low water content, and high impurity precision, and can be reused repeatedly in high-precision hydraulic lubrication equipment both domestically and internationally. It is suitable for purification and regeneration treatment of various lubricating oils in industries such as petroleum, chemical, mining, metallurgy, electric power, transportation, machinery manufacturing, and railways.
Generally, centrifugal or coalescing separation types have higher dehydration efficiency when dealing with high water content (>1000ppm or more), but their dehydration efficiency decreases when water content is lower. Poor-quality equipment may even have poor dehydration effect at several hundred PPM. Moreover, centrifugal or coalescing separation oil purifiers are only suitable for removing free water in the oil, not dissolved water. Long-term dissolved water can easily cause oil emulsification. Emulsified oil not only degrades oil quality but also harms the lubrication of turbine bearings. Anti-fuel oil can also easily accelerate the hydrolysis of oil esters, leading to high acid values, producing sludge and scale, causing servo valve sticking, regulating mechanism malfunction, and seriously affecting the safe operation of the unit.
The coalescing separation structure and principle are relatively simple, but the filter material used for dehydration is quite consumable. The dehydration effect of centrifugal separation depends on the speed of the separation drum. Domestic centrifugal machines used for filtration generally have lower speeds. Imported centrifugal machines have better effects but are expensive.
