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Method and device for treating refractory oil extraction sewage in oilfield

A technology for oil extraction sewage and treatment device, which is applied in the fields of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc. Realize the effect of automatic control, reducing the amount of delivery, and long operation cycle

Inactive Publication Date: 2017-06-27
BEIJING SANDI HENGTIAN PETROLEUM SCI & TECH
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  • Abstract
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Problems solved by technology

[0009] The treatment technologies provided by the above patents are difficult to meet the requirements of subsequent treatment technology for the purpose of high-standard treatment or reuse of oil extraction wastewater

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  • Method and device for treating refractory oil extraction sewage in oilfield

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Embodiment Construction

[0029] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0030] figure 1 It is a schematic diagram of the technological process in the embodiment. Oilfield refractory oil production wastewater passes through settling tank → flotation tank → primary diatomite bio-enhanced suspension clarifier → secondary diatomite bio-enhanced suspension clarifier → primary electro-oxidation unit → secondary electro-oxidation unit → primary Filter→secondary filter→macroporous adsorption resin bed completes the sewage treatment.

[0031] The treatment method of oilfield refractory oil production sewage among the present invention specifically comprises the following steps:

[0032] 1. The heavy oily sewage first goes through the traditional settling tank and flotation tank settling and flotation process to remove oil and machine slag.

[0033] 2. After the oil production sewage adopts the traditio...

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Abstract

The invention discloses a method and device for treating degradation-resistant oil extraction sewage of an oil field. The treatment device and method aim at deep treatment, up-to-standard drainage or reuse of the oil extraction sewage of the oil field, the problem that in the process of treating degradation-resistant oil extraction sewage of an oil field, a traditional treatment process technology is poor in effectiveness is solved, the treatment device and method have the advantages of being low in treatment cost, good in effect and the like and can be widely applied to the field of degradation-resistant oil field oil extraction sewage deep treatment and reuse, the technical difficult problem of treating the degradation-resistant oil extraction sewage of the oil field can be solved fundamentally, and the resource recovery of the oil field sewage is achieved.

Description

technical field [0001] The invention relates to a treatment method and device for oilfield refractory oil production sewage, belonging to the technical field of oilfield sewage treatment. Background technique [0002] Oilfield oily sewage is the waste water after oil and gas separation and dehydration of oilfield production liquid, that is, oily sewage. This oily sewage not only contains crude oil, but also dissolves various salts, suspended solids, harmful gases, organic matter and a large amount of suspended solids; chemicals are usually added in the oil and gas treatment process. The usual pretreatment methods for oil extraction wastewater include floating oil, coagulation-air flotation, and filtration. However, the sewage after pretreatment cannot meet the standard requirements for COD discharge standards, and subsequent standard treatment is necessary. The organic matter in oil production wastewater is often refractory organic matter. Under the situation of increasing...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14
Inventor 马予海綦东慧
Owner BEIJING SANDI HENGTIAN PETROLEUM SCI & TECH
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