Resource recovery treatment device for oily sludge

Abstract

The invention provides a resource recovery treatment device for oily sludge. Considering the difference of viscosity, oil content, water content and other indexes between three-sludge and storage andtransportation tank cleaning oily sludge, the resource recovery treatment device breaks away from the thinking set of the traditional treatment technology, classifies and transports bottom sludge of an oil separation tank, floating scum and the storage and transportation tank cleaning oily sludge to a circulation homogenizing device according to a certain mass ratio for circulation homogenizing treatment. When the physical properties of the mixed oily sludge meet certain conditions, the mixed oily sludge is conveyed into a circulating dehydration device through a PLC control device for circulating dehydration treatment until the water content of the mixed oily sludge meets the treatment load of a subsequent coking device, and finally enters a delayed coking device; oil in the mixed oily sludge is condensed and cracked by utilizing the huge heat capacity of coke in the delayed coking device in a large steam blowing stage; and the converted light oil and a hydrocarbon-containing gas arerecycled, so that the resource harmless treatment of the mixed oil sludge is completed.

Description

technical field [0001] The invention relates to the technical field of environmental protection in the petrochemical industry, in particular to a resource recovery and treatment device for oily sludge. Background technique [0002] In the petrochemical industry, waste water and waste residues generated in various production links of refineries usually need to be treated in sewage workshops. After the sewage is purified, harmful substances are concentrated to form oily sludge, referred to as oily sludge or three sludges, which generally include grease trap bottom sludge, Flotation scum and biochemical sludge, these sludges generally exist in the form of solid waste rich in mineral oil, the main components are crude oil, mud and water, usually, the viscosity of the three sludges is about 1mpa.s ~ 100mpa.s range, oily The ratio is 3% to 15%, the water content is about 80%, and the rest are toxic chemicals, such as heavy metal ions, benzene series or phenols; oil sludge is indus...

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Problems solved by technology

[0007] (2) For the resource treatment of the three muds, whether it is homogenization first and then coking, or dehydration and then coking, practice has proved that the treatment effect of coking is not very satisfactory, and the recovery rate of oil can only reach about 80%, which is mainly The reason is that although the water content of the dehydrated sludge is guaranteed, the composition of the sludge itself is variable and uneven, resulting in that during the coking process of the sludge, the condensation and cracking of heavy oil can only be partially completed, which not only prolongs the coking time, but also leads to insufficient resource recovery. Thoroughly, the result of coking treatment cannot be effectively guaranteed; and because of the high water content of the homogenized three muds, it is easy to exceed the processing load of the coking unit, so that the coking unit can only partially refine heavy oil during the operation cycle, and the treatment cost is also high. very high

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