Resource treatment method for storage and transportation oil sludge

Abstract

The invention discloses a resource treatment method for storage and transportation oil sludge. The resource treatment method includes the steps that (1) a demulsifier is added into the oil sludge accumulated at the bottom of a petroleum tank, and after heating and fully stirring are carried out, solid-liquid separation is carried out; (2) liquid obtained in the step (1) is separated after standing, oil is recovered for reuse in an oil refining unit; (3) a catalyst and an oxidant are uniformly mixed with solid obtained by solid-liquid separation in the step (1) according to a mass ratio, and anactivator is added to extract soluble small molecular organic matter in a solid-liquid mixture; and (4) the solid-liquid mixture obtained in the step (3) is subjected to solid-liquid separation, obtained filtrate is an organic fertilizer solution, the remaining solid is powdered solid carbon, then the organic fertilizer solution is distilled, the solid is dried to obtain a solid organic fertilizer, separated water is reused to the step (2) to prepare the activator after being condensed, then the powdered solid carbon is oxidized-roasted in a muffle furnace to obtain pyrolysis carbon, and thepyrolysis carbon can be recycled to a catalytic oxidation process in the step (3). The resource treatment method is simple in process, low in cost, quick in effect, and large in processing capacity, and can realize full resource utilization of the storage and transportation oil sludge.

Description

technical field [0001] The invention relates to the field of utilization of oil sludge at the bottom of tanks, in particular to a resource treatment method for storing and transporting oil sludge. Background technique [0002] Tank bottom sludge refers to a type of oily sludge deposited on the bottom of various storage tanks, oil storage tanks and oil-water separation tanks. With the application of tertiary oil recovery technology, most oil fields in my country have entered the "three high" stage of high water cut, high oil recovery rate and high recovery degree. The annual output of tank bottom sludge in my country exceeds 10,000 tons, and the high proportion of crude oil content is harmful to the environment and also has resource utilization value. [0003] According to the close combination of oil, mud, sand and water in oily sludge, the large fluctuation of composition makes it difficult to separate and recover oil. The available treatment methods are: solvent extracti...

AI Technical Summary

Problems solved by technology

However, the solvent extraction process is long, the process is complicated, and the cost of the extraction agent is high; in the process of incineration, secondary waste gas pollution is generated, combustion-supporting fuel needs to be added, the oil in the sludge cannot be recovered, and the ash after incineration needs to be further processed; biological method The treatment reaction cycle is too long, the treatment cost is too high, there are potential risks, microbial breeding is difficult and easy to be poisoned; the profile control and reinjection method is difficult to eliminate oily sludge, the requirements are high, and the cost is high. Develop a new type of oilfield tank The treatment method of bottom sludge is of great significance