Oil-containing-waste deep treatment method and system

Abstract

The invention discloses an oil-containing-waste deep treatment method. The oil-containing-waste deep treatment method includes the steps that initial materials are conveyed into a heating cavity, and the heating cavity is heated through the high-temperature flue gas; oil-water mixing gas containing dust particle substances is subjected to low-temperature-medium spraying, and clean oil-water mixing gas is obtained; the clean oil-water mixing gas is subjected to condensation; oil-water mixing liquid is separated through the density difference; a dust-containing oil phase is separated through the density difference. According to the oil-containing-waste deep treatment method, a rapid and efficient deep treatment technology is provided according to oil-containing waste, solid-phase dust particle substances in the oil-water mixing gas can be removed through a temperature-control dust-removing unit, and the reliability of continuous stable operation of the whole technology is improved. The oil-containing waste can be divided into heavy oil, light oil and water, classified and recycled, resource recycling is achieved, and recycled resources can be stored, transported, used in other occasions and can also be directly reused to a treating system, wherein hydrocarbon can serve as fuel, and water can serve as circulating water.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to an advanced treatment technology and system for oily waste. Background technique [0002] Oily waste refers to the viscous solid or semi-solid waste generated during the extraction, storage, transportation and refining of crude oil, which belongs to the HW08 hazardous waste in the "National Hazardous Waste List" (2008). According to statistics, my country produces more than 3 million tons of oily waste every year. If it cannot be disposed of safely and effectively, it will inevitably pose a serious threat to the ecological environment and people's health. On the other hand, the pollutants in oily waste are petroleum, which has high recycling value. [0003] The treatment principles for oily waste are reduction, harmlessness, and recycling. Currently, the main treatment technologies include spin-dry separation, microbial metabolic degradation, incineration, organ...

AI Technical Summary

Problems solved by technology

The drying separation method is mainly suitable for wastes with high liquid content. The oil content of the separated solid phase is difficult to meet the environmental protection requirements, and advanced treatment is still required; the microbial metabolic degradation method is mainly suitable for wastes with low oil content. Natural metabolism decomposes oily substances, but the treatment period is long, the cultivation conditions of microorganisms are complicated, and the metabolic process of microorganisms is to decompose petroleum substances, which cannot realize the recovery and resource utilization of oily substances; the incineration method is to combine them with fuel Cooperate with combustion to achieve solid-phase harmless treatment, but secondary pollution will be generated during the incineration process, and oil substances that can be recycled and reused cannot be recovered; organic solvent cleaning method uses the principle of extraction to separate oil substances in the solid phase come out, and then use heating to recover the organic solvent, but the organic solvent used in this method has certain toxicity, which will pose a threat to human health and the ecological environment. At the same time, there is a risk of explosion when the solvent solubility is high; In an oxygen or anaerobic environment, the liquid phase is vaporized by indirect heating to realize the separation technology from the solid phase. The oil content of the solid phase after treatment is low, and it is currently recognized as a terminal treatment technology for oily waste.

[0004] In the process of using heat treatment technology to treat oily waste, due to the difference in the liquid content of the materials, the amount of oil-water mixture produced is unstable. Excessive oil-water mixture will cause the oil-water mixture to contain solid phase dust particles. This solid phase The existence of dust particles is not conducive to the continuous and stable operation of the whole process

The prior art "A Method and System for Treating Oilfield Waste" (publication number: CN104150728B) also fails to solve the problem of dust, and the decomposed oil has uneven density, which is not conducive to reuse

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