Method for treating bottom mud of crude oil groove

Abstract

The invention discloses a method for treating bottom mud of a crude oil groove, wherein the method comprises an oil sludge pretreatment step, a rotational flow three-phase separation step, a petroleumgas oxidation incineration step, a liquid catalyst extraction step and a liquid catalyst recovery step, wherein an oil product generated in the rotational flow three-phase separation step is recovered to a recovered oil temporary storage groove so as to be conveniently conveyed to a crude oil groove, waste gas is introduced into the petroleum gas oxidation incineration step so as to be oxidized and incinerated, solid waste generated in the liquid catalyst extraction step can be directly buried or can be utilized after being solidified, a crude oil and liquid catalyst mixture produced in the liquid catalyst extraction step is firstly fed into a mixed liquid temporary storage tank, and the liquid catalyst is recycled after being fed in the later liquid catalyst recovery step.

Description

technical field [0001] The invention relates to a method for treating the bottom sludge of a crude oil tank, in particular to a method for treating the oil sludge removed from the oil tank through the cleaning operation of the crude oil tank. Background technique [0002] Based on safety considerations and in accordance with industrial safety requirements, storage tanks used for storing crude oil must be opened for safety inspection at least once every five years, and in order to carefully inspect and confirm the structure of the oil tank, pipe fittings, tank bottom, drainage facilities, and oil tank walls , and other main structures are still intact and usable. Usually, the owner will first extract the crude oil stored in the crude oil tank, and then remove the sludge at the bottom of the oil tank out of the oil tank, and then use steam or high-temperature hot water to clean the oil tank wall and bottom plate inside the oil tank. Clean until inspectors can enter the tank an...

AI Technical Summary

Problems solved by technology

[0006] Although, in addition to the processing of centrifuges on the market, there are also pyrolysis methods that use pyrolysis (Pyrolysis) to indirectly heat oil sludge; however, due to the use of pyrolysis methods, materials need to be heated to Above 550℃ makes the oil sludge boil and evaporate, but because the water and oil in the oil sludge will have azeotropic problem at this temperature, the produced wastewater will contain a high proportion of oil content, and the recovered oil will also contain a high proportion of Therefore, if it is to be recovered, it must be reprocessed, or several "recycling distillation" structures are added to the condensation column section of the thermal cracking tower. In this way, the control device will become very complicated and the operating cost will be greatly increased. improve

In addition, since thermal cracking needs to be operated in a "batch type" (Batch Type), low efficiency is another obstacle. Therefore, until now, this thermal cracking method is not common in the market

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