Oil sludge solutions

INTRODUCTION

Oil sludge is the largest waste produced by the petroleum industry during exploration, mining and gathering. It is generally divided into oil sludge produced by oil fields and oil sludge produced by the petrochemical industry (mainly refineries). The oil sludge in the oil field includes the oil sludge that is produced during the oilfield development process, the oil sludge at the bottom of the tank during the production operation of the joint station, and the oil sludge generated during the operation of the sewage station. These wastes have high oil content but cannot be directly used or effluxed. They are piled up in the air or buried underground. This not only pollutes the environment, but also causes a lot of waste of resources. The oil sludge in the oilfield has been classified as dangerous solid waste (HW08) and has been included in the crisis. One of the main pollutants produced during the transportation process, with the development of tertiary oil recovery. The sludge production is becoming more and more serious.

Oil sludge

Harm

With the development of the petroleum industry, the production of oil sludge is increasing. The oil content in oil sludge is generally 10 to 50%. The oil sludge is bulky. If it is not treated directly, it will not only occupy a large amount of cultivated land, but also be accompanied by malodorous gas, which will cause pollution to surrounding soil, water and air. The sludge contains a large number of pathogenic bacteria, parasites, metals such as copper, zinc, chromium, mercury, salts, and toxic and hazardous substances that are difficult to degrade such as polychlorinated biphenyls, dioxins, and radionuclides. These sludges are scattered in the earth oil pool or buried, which seriously pollutes the environment, affects clean production, and causes waste of resources. Considering the economic benefits, if it is treated and recycled, it can not only improve the environment, but also benefit the human beings.

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What can we do for you？

LCDRI is seeing the core problems. After a lot of research, it has compared various separation methods to determine the best separation process route (this separation process has obtained national patent). At the same time, the main equipment was industrialized and tested, and satisfactory results were achieved. The predetermined technical indicators were achieved and officially put into operation in 2015.

LCDRI’s sludge extraction equipment is mainly used to deal with oil sludge generated during the process of crude oil exploitation due to drilling, workover, oil recovery, gathering, storage, etc. Its function is to separate the waste sludge and extract the refined oil in the sludge, which not only solves the environmental pollution, but also realizes considerable economic value.

The equipment is armored for easy transportation, small footprint, modular device, low operating cost, good cleaning effect and easy operation. There is a mature sludge pretreatment device, which has rich experience in sludge pretreatment, automatic feeding and unloading, and automation. The oil content after solid-liquid separation treatment is three thousandths, and the treated solid phase can be used for paving, well site, brick making and other comprehensive utilization. Advanced sludge, cuttings, oil-bearing soil follow-up treatment technology, to achieve standard discharge. The utilization rate of refined oil has been improved, which not only produces good economic benefits, but also solves the problem of sludge and sand polluting the environment.

The three-phase horizontal centrifuge is used for separation. The liquid-liquid-solid three-phase separation principle is adopted, and the oil, water and mud are separately separated by centrifugal force, and the oil phase oil content after separation by the three-phase horizontal screw centrifuge is greatly reduced. The three-phase decanter centrifuge is a fully automatic, fully enclosed, continuous treatment process when the sludge is separated. The equipment has a small footprint, high automation, low labor intensity and clean working environment.

The system maximizes separation efficiency with low-cost pharmaceuticals and innovative high-automation machinery. The equipment abandons the old and imperfect production process of crude oil. For the first time, it adopts the domestic advanced physical, ultrasonic, separation and tri-integration treatment methods to fully decompose the sludge, and achieve complete separation of oil, water and mud sand.