Waste mineral oil decolorizing refining process and operation method thereof

Abstract

The invention discloses a waste mineral oil decolorizing refining process and an operation method thereof. According to the process and the operation method, waste mineral oil is pumped into a pretreatment tank, and is subjected to pretreatment of filtering, settling and dewatering; the pre-treated waste mineral oil enters a water washing tank, wherein an alkali liquid, water and a demulsifier areadded into the water washing tank to remove organic acids and water-soluble additives from the oil; the waste mineral oil is subjected to oil-water separation, and then is further subjected to hydrodechlorination treatment; the waste mineral oil raw material enters a pressure reducing distillation tower to separate different distillate mineral oil base oils after pressure reducing; and finally the finished refined oil is classified and packaged in an oil barrel, and a label is adhered so as to conveniently store and sell. According to the present invention, the method has advantages of simpleoperation steps, good catalytic effect in the hydrofining step, complete reaction, uniform components of the treated mineral oil, high product quality, and convenient and fast storage and transportation of the finished product, and can easily achieve the large-scale treatment and continuous operation of equipment, and can obtain good environmental benefits and economic benefits.

Description

technical field [0001] The invention relates to the technical field of recovery and reuse of waste mineral oil, in particular to a process for decolorizing and refining waste mineral oil and an operation method thereof. Background technique [0002] Mineral oil is currently the most widely used chemical substance in the world, but if the waste oil produced after the use of mineral oil is not properly disposed of, many harmful substances such as polycyclic aromatic hydrocarbons will be produced in the waste mineral oil, which have a strong carcinogenic effect; The polycyclic aromatic hydrocarbons such as polychlorinated biphenyls (PCBs), and waste mineral oil also contain many heavy metal additives and organic compounds containing chlorine, sulfur, and phosphorus added to improve the performance of oil, which will cause serious pollution to water and soil. The growth of animals and plants and the living environment of human beings are listed as high-risk wastes for priority m...

AI Technical Summary

Problems solved by technology

[0003] At present, the existing waste mineral oil recovery and reuse methods have complicated operation process and high treatment cost. At the same time, the purity of the treated mineral oil is not high, and the regeneration efficiency is not high. It is difficult to recycle or sell, resulting in poor economic benefits, and Not conducive to industrialized integrated production