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Graphene oxide membrane cross-flow filtration process for treatment of oily sewage

A graphene membrane and cross-flow filtration technology, which is applied in water/sewage treatment, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of easy pollution in the use process, complicated preparation process, and long service life. Short and other problems, achieve the effect of reducing membrane fouling, simple process, and reducing deposition

Inactive Publication Date: 2019-11-08
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

Although the above-mentioned graphene-based membrane materials have a separation effect on oily sewage, the separation efficiency is poor, the service life is short, and the preparation process is complicated, and it is easy to be polluted during use.

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  • Graphene oxide membrane cross-flow filtration process for treatment of oily sewage
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  • Graphene oxide membrane cross-flow filtration process for treatment of oily sewage

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Embodiment Construction

[0021] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0022] Such as figure 1 As shown, the invention discloses a graphene oxide membrane cross-flow filtration process for oily sewage treatment, which specifically comprises the following steps:

[0023] (1) Inject the oily sewage into the pre-storage tank, add a demulsifier into the pre-storage tank, and the tank is equipped with a stirring device to make the oil in the sewage completely free.

[0024] (2) Send the stagnant sewage to the graphene oxide membrane cross-flow filtration device through the lifting pump, and transport the sludge to the sewage sludge tank through the bottom sewage outlet.

[0025] (3) Cross-flow filtration is carried out through the graphene oxide membrane, and the produced water is transported from the water outlet to the...

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Abstract

The invention specifically relates to a graphene oxide membrane cross-flow filtration process for treatment of oily sewage, belonging to the technical field of treatment of oily sewage. The process comprises the following concrete steps: injecting oily sewage into a pre-storage tank, and adding a demulsifier into the pre-storage tank which is provided with a stirring device that allows oil in thesewage to be in completely free state; delivering the sewage having undergone standing to a graphene oxide membrane cross-flow filtration device via a lift pump, and conveying sludge to a sewage sludge tank through a bottom sewage outlet; and carrying out cross-flow filtration via the graphene oxide membrane, and conveying produced water to a produced water collection tank from a water outlet viathe lift pump. The process of the invention has the characteristics of simple process, high membrane filtration efficiency, good filtration effect and strong pollution resistance. After treatment, theoil content of the sewage is no more than 6.0 mg / L, the suspended matter content of the sewage is no more than 4.0 mg / L, and the median value of suspended solids in the sewage is no more than 2.0[mu]m, so the treated sewage can meet requirements on the water quality of oilfield flooding.

Description

technical field [0001] The invention relates to the technical field of oily sewage treatment, in particular to a graphene oxide membrane cross-flow filtration process for oily sewage treatment. Background technique [0002] Oily sewage comes from a wide range of sources, such as petrochemical, pharmaceutical, transportation, mechanical processing, textile, food and other fields. Oily sewage has high oil content, high chemical oxygen consumption, and serious environmental pollution. Therefore, the effective separation of oily sewage is of great significance to environmental governance, oil recovery and water recycling. Due to its high specific surface area and special wetting properties, graphene oxide materials can separate oily sewage simply and efficiently, thereby solving the problem of serious environmental pollution caused by oily sewage. [0003] For the current oily sewage treatment process, filtration equipment is the key equipment in sewage treatment and the last ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04
CPCC02F1/00C02F1/44
Inventor 郝金克栾智勇刘正提阳徐传雨王康于滨马继良
Owner CHINA PETROLEUM & CHEM CORP
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