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Oilfield produced water compound treatment system and method

A technology for composite treatment and production of water, applied in the field of water treatment, can solve the problems of large fluctuations in effluent water quality, multiple treatment equipment, and difficult operation and control, and achieve the effects of low environmental pollution, high removal efficiency, and effective interception

Active Publication Date: 2016-01-20
SHAANXI RES DESIGN INST OF PETROLEUM CHEM IND
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Problems solved by technology

[0004] The purpose of the present invention is to provide a complex treatment system for oilfield produced water in view of the technical problems of the existing oilfield produced water treatment process, such as many treatment equipment, long and complicated process route, difficult operation control, large fluctuation of effluent water quality, etc.

Method used

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  • Oilfield produced water compound treatment system and method
  • Oilfield produced water compound treatment system and method
  • Oilfield produced water compound treatment system and method

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Embodiment Construction

[0021] The technical solution of the present invention will now be further described in conjunction with the drawings and embodiments.

[0022] Depend on figure 1 It can be seen that the oilfield produced water composite treatment system is composed of an oil-water separator 1, a buffer water tank 2, an inorganic carbon film processor 3, a water storage tank 4, a filter adsorption processor 5, a backwash pump 7 and a purified water tank 6 through pipelines. constitute.

[0023] Among them: the oil-water separator 1 belongs to the pretreatment unit, which can be a cyclone or an inclined plate degreaser or a three-phase separator, which is a commonly used equipment. The pipeline is connected, and the water outlet of this oil-water separator 1 is communicated with the water inlet of buffer water tank 2 through pipeline, and the water outlet of buffer water tank 2 is communicated with the water inlet of inorganic carbon membrane processor 3 through pipeline, and the filtration of...

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Abstract

The invention belongs to the technical field of water treatment, and particularly provides an oilfield produced water compound treatment system and method. The system comprises an oil-water separator, a buffer water tank, an inorganic carbon film processor, a water accumulating tank, a filtration and adsorption processor, a backwashing pump and a treated water tank, oil and water are separated, treated through an inorganic carbon film and filtered and adsorbed, floating oil and emulsified oil in produced water can be completely removed, the removal effect to dissolved oil in water is good, and the content of the residual dissolved oil in the producing water is extremely low. According to the oilfield produced water compound treatment system and method, operation is easy, maintenance is convenient, the cost is low, chemical agents such as PH regulators, flocculants and coagulants are not needed, secondary pollution does not exist, and environmental pollution is small.

Description

technical field [0001] The invention relates to a treatment system and method for oilfield produced water, belonging to the technical field of water treatment. Background technique [0002] Due to the complex composition of oilfield sewage, which mainly contains oil, suspended solids, rock debris, corrosion products, gas and bacterial microorganisms, etc., the oil content and the form of oil in water are also different. In practical applications, a single water treatment method is usually adopted. Often the effect is not good and there are limitations, so two or more methods need to be used in combination. [0003] The water quality characteristics, production methods, environmental conditions and uses of treated water in oilfields are different, and oilfield sewage treatment processes are quite different, but the main methods are through demulsification and removal of dispersed oil, gravity sedimentation separation, air flotation separation, coarse filtration, Processes su...

Claims

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Application Information

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IPC IPC(8): C02F9/02C02F103/10
Inventor 王丽莉闫旭涛朱瑞龙杨鸿鹰王玲燕沈哲
Owner SHAANXI RES DESIGN INST OF PETROLEUM CHEM IND
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