Harmless treatment method and system for oily sludge

Abstract

The invention relates to a harmless treatment method and system for oily sludge. The method comprises the following steps: (1) carrying out crushing pretreatment on oily sludge and impurities contained in the oily sludge to obtain a to-be-treated material; (2) carrying out chemical thermal washing treatment on the to-be-treated material, so that organic matters are quickly desorbed from the surface of the oily sludge; (3) carrying out solid-liquid separation on the oily sludge subjected to chemical thermal washing treatment; (4) conveying a solid phase obtained after solid-liquid separation toa rotary high-temperature indirect thermal phase separation device for innocent treatment; and (5) treating the reducing soil obtained through rotary high-temperature indirect thermal phase separation, then outputting, pumping out pyrolysis steam generated through rotary high-temperature indirect thermal phase separation, cooling, and separating. According to the invention, harmless and resourcerecycling of oily sludge can be achieved, secondary pollution is avoided, the treatment period is short, pollutants are thoroughly removed, resource recycling of organic matter in the oily sludge canbe achieved, and good social, environmental and economic benefits are achieved.

Description

technical field [0001] The invention belongs to the field of environmental protection treatment of oily sludge in the fields of oil and gas field exploitation, petrochemical industry, etc., and relates to a method and system for harmless treatment of oily sludge, in particular to a combination of chemical heat washing and rotary high-temperature indirect thermal phase separation. A method and system for harmless treatment of oily sludge. Background technique [0002] The main sources and characteristics of oily sludge are: (1) The oily sludge produced by the desilting of the container of the dehydration system, including the dirty oil and sludge cleaned out by the two-in-one device, three-in-one device, free water separator, heating furnace, etc. (2) Oily sludge is produced by desilting oily sewage treatment system containers and sewage recovery tanks. Due to the characteristics of the oil collection process of the water treatment container, it is difficult to completely rec...

AI Technical Summary

Problems solved by technology

Among them, the incineration method consumes a lot of energy to treat oily sludge, and harmful gases are easily released into the atmosphere during the treatment process, causing secondary pollution to the environment, and oil resources have not been recycled.

The biological treatment method has low treatment cost and does not produce secondary pollution, but its treatment effect is mostly limited by time and natural environment. Its treatment cycle is long and greatly affected by changes in the natural environment. The treatment effect on oily sludge with high organic content is not good. Very good, the metabolic activities of some organic matter microorganisms cannot be well degraded and oil resources cannot be recycled

The solvent extraction method has a long process, complicated process and high treatment cost for oily sludge, and is mostly suitable for oily sludge containing a large amount of organic matter that is difficult to degrade

The chemical washing method can repair the oily sludge better, and can also realize the resource recovery and reuse of organic pollutants, but the organic pollutants in the oily sludge cannot be completely removed, and the effect of harmless treatment cannot be achieved

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