Heavy oil sludge hot fine washing-multiphase separation method and system

Abstract

The invention discloses a heavy oil sludge hot fine washing-multi-phase separation method and system. The method comprises the following steps: hot fine washing: adjusting the moisture content of the heavy oil sludge to be 80-85% and the temperature to be 75-93 DEG C; adding an oil sludge treatment agent into the material, and homogenizing and reacting with the material; and phase separation: performing three-phase separation of oil, water and mud on the reacted material. According to the process technology, the effects of multiphase cleaning and three-phase efficient separation of the heavy oil sludge can be achieved, the reduction rate is larger than or equal to 90%, the crude oil recovery rate is larger than 50%, the quality is good, sewage can be recycled or discharged to a gathering and transportation system of a united station, after the sludge is aired and dried, the oil content can be reduced to 2% or below, and compliance disposal and resource utilization can be carried out. Therefore, according to the process technology, reduction treatment and resource utilization of the heavy oil sludge can be achieved, the process route is complete and mature, the treatment cost is low, the application range is wide, the effect is good, and economic benefits and social benefits are remarkable.

Description

technical field [0001] The invention relates to the technical field of oily sludge treatment in oilfields, in particular to a method and system for thermal fine washing-multiphase separation of heavy oil sludge. Background technique [0002] Oily sludge has been listed as oily waste in the "National List of Hazardous Wastes" in my country. The country requires that oily sludge must be treated in a harmless manner to realize resource recycling. At present, the treatment of oily sludge mainly adopts chemical heat washing method, extraction separation method, biological treatment method, incineration method, etc., but for oily sludge with relatively complex components, especially heavy oil sludge, the traditional chemical heat washing method can effectively clean Unclean, incomplete, and poor reduction effect; extraction separation method has high treatment cost, and the recovery and reuse efficiency of extractant is not high; biological treatment method has a long cycle and ca...

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Problems solved by technology

The present invention aims at the current problems of high viscosity of heavy oil sludge, poor three-phase separation effect of oil and cement, and low applicability of process technology, etc., and provides an economical, environmentally friendly, fast and effective hot fine washing-multiphase separation method; the method treats Large amount, low treatment cost, good treatment effect, high crude oil recovery rate and good quality, can achieve a large reduction, and the oil content of the separated residual sludge (residual solid phase) after treatment is ≤2%, which can be used as a resource use

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