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Treatment method for recycling oil-field oily sludge

A treatment method and a resource-recycling technology, which are applied in the field of oil-containing sludge recycling in oil fields, can solve the problems that oil and sediment are not easily peeled off, cannot be operated, and the extraction phase and sediment are not easily separated, so as to achieve easy separation, recovery and elimination. Environmental pollution, sufficient extraction effect

Inactive Publication Date: 2014-03-12
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This patent has the problem that the oil and the sediment are not easy to peel off and the extraction phase is not easy to separate from the sediment. At the same time, there are no restrictions on the electric floating plate and the mechanical impurities in the immersion water, which may cause the increase of the middle layer of the extraction and the emulsified oil. formation, and eventually fail to operate

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  • Treatment method for recycling oil-field oily sludge

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Embodiment 1

[0030] A treatment method for recycling oily sludge in oil fields, the treatment equipment includes an oily sludge lifting device, a vibrating screen, an extraction tank, a three-phase separation tank, a distillation tower, and an electric floating device;

[0031] Specific steps:

[0032] 1) The oily sludge lifting device lifts the oily sludge to the vibrating screen, and in the vibrating screen, lumps with a particle size greater than 0.5cm in the oily sludge are removed;

[0033] 2) Dilute oily sludge to 1 m 3 placed at 5 m 3 In the extraction tank, pump 1m 3 The extractant, stirred for 90min to completely dissolve the oil, inject 1m 3 After the oilfield produced water was stirred and settled for 10 minutes, the extraction phase was pumped into a three-phase separation tank to separate the solid phase, water phase, and oil phase; the extraction agent was 6 ＃ A mixture of solvent oil as the main agent, and the extraction temperature is 35°C in a batch-type extraction met...

Embodiment 2

[0038] A treatment method for recycling oily sludge in oil fields, the treatment equipment includes an oily sludge lifting device, a vibrating screen, an extraction tank, a three-phase separation tank, a distillation tower, and an electric floating device;

[0039] Specific steps are as follows:

[0040] 1) The oily sludge lifting device lifts the oily sludge to the vibrating screen, and in the vibrating screen, lumps with a particle size greater than 0.5cm in the oily sludge are removed;

[0041] 2) Dilute oily sludge to 1m 3 put in 1 # In the extraction tank, pump into 2m 3 extractant, stir to dissolve the oil completely, inject 1 m 3After producing water from the oilfield and stirring and settling for 10 minutes, the extraction phase is pumped into a three-phase separation tank to separate the solid phase, water phase, and oil phase; the extraction agent is a mixture of oilfield condensate oil and petroleum ether as the main agent. The extraction process adopts a batch m...

Embodiment 3

[0046] A treatment method for recycling oily sludge in oil fields, the treatment equipment includes an oily sludge lifting device, a vibrating screen, an extraction tank, a three-phase separation tank, a distillation tower, and an electric floating device;

[0047] Specific steps are as follows:

[0048] 1) The oily sludge lifting device lifts the oily sludge to the vibrating screen, and in the vibrating screen, lumps with a particle size greater than 0.5cm in the oily sludge are removed;

[0049] 2) Dilute oily sludge to 1 m 3 Put in 1# extraction tank, pump into 3m 3 The extractant, stirred for 50min to completely dissolve the oil, injected 3 m 3 The oil field produces water, and after settling for 60min, the extract phase is pumped into the three-phase separation tank to separate the solid phase, water phase and oil phase; the extractant is 6 ＃ The mixture of solvent oil, aromatic hydrocarbons and oil field condensate oil as the main agent, the extraction process adopts ...

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Abstract

The invention relates to treatment of oil-field oily sludge and particularly relates to a treatment method of recycling oil-field oily sludge. A treatment device comprises a waste oil sludge lifting device, a vibrating sieve, an extracting tank, a three-phase separating tank, a distillation tower, and an electrical floating and filtering device; a treatment method comprises steps of mechanical sieving, solvent extracting, three-phase separating, solvent recycling and oil residue treating. According to the method, the extracting method is the water-assisted solvent extracting process, so that the extraction is relatively sufficient and the later-stage phase separating and recycling are relatively facilitated; a solvent can be recycled, and assisted water can be recycled after electrical floating and filtering treatment, so that secondary pollution is not caused, mud residue can be effectively utilized after biological treatment, and therefore, a waste oily sludge resource is sufficiently utilized, petrol resources are saved, environmental pollution is eliminated, and economic and social benefits are generated.

Description

technical field [0001] The invention relates to the treatment of oily sludge in oil fields, in particular to a treatment method for recycling oily sludge in oil fields. Background technique [0002] The source of oily sludge in oilfields is mainly oily sludge produced during crude oil extraction, gathering and transportation. In addition to crude oil, these oily sludges also contain formation sediment carried in the production fluid, oily scum formed during the sewage treatment process of oilfield sewage treatment stations, corrosion products of pipelines and storage tanks, and colloids, asphaltenes, etc. , and a certain amount of moisture. [0003] The oily sludge produced in the process of crude oil extraction mainly comes from the surface treatment system of the produced fluid, the oily sludge produced in the process of oil production sewage treatment, and the flocs formed by the water purifying agent added in the sewage purification treatment, etc. Oilfield oily sludge...

Claims

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Application Information

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IPC IPC(8): C02F11/00C02F11/02
Inventor 赵瑞玉李静朱成君王振波刘会娥罗贵林朱晓菲
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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