Oil field oil sludge drying treatment combined device and oil sludge drying treatment technique

Abstract

The invention relates to an oil field oil sludge drying treatment method, in particular to an oil field oil sludge drying treatment combined device and an oil sludge drying treatment technique, being technically characterized in that oil sludge with the moisture content of about 80% is firstly added into a sludge hopper from an oil sludge inlet, and the wet sludge is sent into a paddle dryer by the sludge hopper through a lower screw conveyer; a hollow shaft of the paddle dryer as well as a hollow blade and a dimple jacket which are arranged on the hollow shaft are internally communicated with a high temperature heating medium, so that the sludge can be treated by drying; oil-water mixed steam with moisture evaporated out from the paddle dryer enters the cyclone separator, and trace sludge dust enters the cyclone separator, so that gas-solid separation can be carried out; the trace sludge dust returns back into the paddle dryer, and the purified moisture enters an oil-water separator for cooling and separating oil and gas; and the oil is recovered into an oil storage tank. The oil field oil sludge drying treatment combined device and the oil sludge drying treatment technique have the advantages of shrinkage, harmlessness and reclamation.

Description

technical field [0001] The invention relates to an oilfield oil sludge drying treatment method, in particular to an oilfield oil sludge drying treatment combined device and an oil sludge drying treatment process. Background technique [0002] The oily sludge produced in the process of crude oil extraction mainly comes from the ground treatment system, oil tank bottom sludge, oily sludge produced in the process of oilfield produced water treatment, plus a large amount of coagulant and corrosion inhibitor added in sewage purification treatment Oily sludge is composed of flocs formed by water purifiers such as antiscalants, fungicides, corrosion products of equipment and pipelines, scales, and bacteria. [0003] The specific characteristics of oily sludge are as follows: high oil content and high viscosity; complex composition and difficult treatment; most of the harmful components exceed the emission standards; and contain high calorific value. [0004] Due to the large volum...

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Problems solved by technology

If it is not treated and discharged directly, it will not only occupy a large amount of cultivated land, but also pollute the soil, surface water and groundwater with the washing of rainwater, and the odor produced by oily sludge will pollute the surrounding soil, water and air.

In addition, oily sludge is a very good recyclable resource because of its extremely high hydrocarbon content. If it is discarded and not recycled, it will be a great waste.

[0005] At present, the treatment of oily sludge at home and abroad usually focuses on stacking, landfill, incineration, solidification, biological treatment, extraction, heat treatment, etc., but due to the limitations of the above methods, there is no mature method yet. The treatment process appears

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