A kind of treatment method and treatment system of sludge, waste residue or oil sand in natural oil mines that pollute deep oil and water all year round

Abstract

The invention discloses a treatment method and a treatment system for perennially polluted deeply oily and watery sludge, waste residue or oil sand in natural oil mines. The method combines oily and watery solid matter with low Boiling point Weak polar or low boiling point non-polar organic solvent liquid is fully contacted, oil and water in the solid are extracted into the liquid phase, and after solid-liquid separation, the liquid phase is easily separated by decompression or heating up to vaporize the low boiling point Organic solvents with low latent heat and oil and water, the solvent gas is compressed and condensed and then recycled, and the extracted oil and water are separated from oil and water, and the extracted oil can be used as fuel or used for refining. The invention is a high-performance, low-energy-consumption treatment method for solid matter containing oil and water. The effect of oil extraction is outstanding, the extraction solvent is completely separated from the recovered oil, the recycling process of the extraction solvent is simple and energy-saving, and oil extraction and dehydration can be performed simultaneously. , to a greater extent to achieve the oil recovery and recycling of oily sludge, energy goals.

Description

technical field [0001] The invention belongs to the field of environmental pollution, and specifically relates to a treatment method and a treatment system for sludge, waste residue or oil sand in natural oil mines that have been polluted deeply all the year round and contain oil and water, and are especially suitable for tank bottom oil sludge produced during crude oil storage and transportation. Oily and watery sludge produced by oil refineries and oil refinery sewage treatment plants, oil-contaminated soil, sandy soil, and oil sands, oily waste white clay from petrochemical companies, oily waste residue from petrochemical companies, oily soil left after oil extraction in oil fields, etc. , and can recover oil after treatment. Background technique [0002] A large amount of oily sludge is produced in the process of oil extraction, production, and storage. EPA research shows that every 500 tons of crude oil processed will produce 1 ton of oily sludge. The annual production ...

AI Technical Summary

Problems solved by technology

However, the separated liquid phase is rectified according to the boiling range of the main agent A, auxiliary agent B and auxiliary agent C, and then compounded with a fresh mixed solvent, that is, the recovery of the extraction solvent consumes a lot of energy

[0008] To sum up, the raw materials currently used as oily solid substances, especially oily and watery sludge, waste residue or oil sand extraction solvents in natural oil mines are mainly light coal tar, petroleum ether, naphtha, benzene, etc. , toluene and other solvents that are liquid at normal temperature and pressure, or a combination solvent with a wide boiling range, can achieve satisfactory extraction results under certain temperature and pressure operating conditions, but a key problem of the above-mentioned solvent extraction method is that the extraction after extraction Since the solvent is liquid at normal temperature and pressure, the mixture with the extracted oil needs to be separated and recovered through complex processes such as rectification to obtain the extraction solvent, which affects the economic performance of the oily sludge extraction technology and delays the promotion of this technology application

Images