Treatment method and device of tank-cleaning sump oil

Abstract

The invention provides a treatment method and device of tank-cleaning sump oil. The treatment method comprises the following steps: heating the tank-cleaning sump oil to 60 to 90 DEG C and carrying out adjusting treatment to obtain adjusted sump oil; separating the adjusted sump oil to obtain recycled oil, sewage and oil-containing solid impurities; carrying out extraction and oil removal treatment on the oil-containing solid impurities to obtain extracted oil and oil-containing residues; carrying out resolving, electro-catalytic oxidation and solid-liquid separation on the oil-containing residues to finish the treatment of the tank-cleaning sump oil. The invention further provides the treatment device of the tank-cleaning sump oil. By adopting the treatment method and device provided by the invention, the solid content and moisture content of recycled oil of the treated tank-cleaning sump oil are low; the oil content of the generated residues is low and the residues are easily dried.

Description

technical field [0001] The invention relates to a method and a device for treating dirty oil, in particular to a method and device for treating dirty oil from tanks, and belongs to the technical field of solid waste treatment. Background technique [0002] During the storage process of crude oil, heavy oil components (high melting point wax, asphaltene, colloid), non-oil components (fine particles, large particles of mud sand, salts, mechanical impurities, ferrous sulfide and other inorganic impurities) will It is deposited with water to the bottom of the tank to form sludge, which reduces the effective volume of the oil tank. After accumulating to a certain amount, it will affect the normal production and operation, and the tank needs to be cleaned. According to the lightness and weight of crude oil, in addition to the previous shear mixing tank cleaning, high-quality light crude oil and light diesel oil are also used for cleaning, and the cleaned-up mixture is called tank ...

AI Technical Summary

Problems solved by technology

The biggest problem of cleaning dirty oil is high emulsification and high content of fine particles. The re-smelting process seriously affects the long-term stable operation of production equipment, increases energy consumption, and reduces efficiency.

First, the degree of emulsification of electric desalination drainage is aggravated, resulting in "black water" in electric desalination cutting water. After being discharged into the sewage system, it still appears in the form of dirty oil and hazardous waste, causing a vicious circle; second, affecting the heat exchange network of the device Heat balance, the heavy oil components and non-oil components in the dirty oil gradually deposit on the surface of the heat exchanger tube bundle to form deposits, which reduces the heat transfer efficiency of the heat exchanger, resulting in a continuous decrease in the final heat exchange temperature of crude oil, wasting heat sources, and at the same time It greatly increases the cooling load of diesel oil and normal residual oil; thirdly, it affects the stable operation of the distillation tower, and some particles will be deposited on the surface of the tray, which affects the mass transfer efficiency and has a serious impact on the operating parameters and long-term operation of the equipment. The loss is huge; Fourth, coking and blending treats the waste oil from clear tanks as residual oil, which itself reduces its proper quality, and the blending process not only affects the efficiency of the fractionation tower, but also increases the ash content of coke and reduces the quality, which affects the economic benefits. The damage is also very serious

[0004] There are too many unfavorable factors for a small amount of atmospheric and vacuum refining treatment or coking and blending treatment of tank cleaning waste oil, and outsourcing treatment causes great waste of resources and economic losses, which cannot reasonably and effectively solve the problem of cleaning tank waste oil. In order to solve this problem in a long-term and effective manner, from the perspective of clean production, mature refining treatment technology is urgently needed

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