Advanced treatment process of sludge containing oil

Abstract

The invention discloses an advanced treatment process of sludge containing oil, belonging to the field of environment and resource utilization. The invention mainly utilizes the quenching and tempering separation technology, microorganism anaerobic degradation, floating sludge filtering and the centrifugal separation technology to ensure that moisture content is lowered by 5% after the oil is separated from the sludge so as to be recycled; and after being treated, sludge water directly reaches the oil field A3 reinjection standard, and tailing sludge reaches the agricultural standard, so that the environmental problem of the sludge containing the oil is completely solved. The process has simplified flow, reliable operation, simple equipment maintenance, low operation cost, small land occupation, investment saving and high comprehensive benefit of harmless reclamation, does not need to replace filter materials and does not have complex back wash flow and programmable logic controller (PLC) control.

Description

technical field [0001] The invention relates to an advanced treatment process of oily sludge, in particular to a harmless resource recovery process of oily sludge involving various methods such as biological treatment and physical and chemical treatment, and belongs to the technical field of industrial waste residue solid waste treatment. Background technique [0002] Petroleum is an extremely important fossil energy. Although my country's petroleum industry started relatively late, it has developed rapidly. At present, it is reported that there are more than 450 oil fields across the country, with oil resources reaching 94 billion tons. However, in the process of oilfield exploitation, oilfield sewage treatment system and crude oil production, storage and transportation system will produce a large amount of oily sludge, and various oilfield oily sludge (including ground crude oil, oily sludge from refinery, tank bottom sludge, etc.) are increasing day by day. The total amo...

AI Technical Summary

Problems solved by technology

In my country, the method of using oil sludge as a raw material for coking equipment has not been applied. One of the reasons may be that the sludge still contains a large amount of water, which is easy to affect the coking operation, and the coking treatment capacity is low, and all the three sludges cannot be disposed of; another investment Too large, high operational safety requirements

[0011] Direct landfilling of oily sludge is currently the main oily sludge disposal method adopted by most domestic oil fields, but this method not only wastes precious energy, but also may cause environmental pollution

[0012] The recovery of oil in various physical and chemical treatment methods is not complete, and there are secondary pollution problems of wastewater and waste residues, which still need to be considered for further treatment or comprehensive utilization

In addition, oily sludge in oilfields is widely produced, mostly intermittently, and the properties of oily sludge from different sources are different, which limits the comprehensive use and promotion of this treatment method in oilfields

Images