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Electrolytic sterilization method and device for oilfield sewage

A technology of oilfield sewage and sterilization equipment, which is applied in water/sewage treatment, chemical instruments and methods, water/sewage treatment equipment, etc. It can solve the problems of reduced sterilization effect, inability to continue, shorten the service life of pipelines, etc., and achieve the sterilization effect Stable, low-cost sterilization effect

Inactive Publication Date: 2015-01-28
XIAN HUALU ENVIRONMENTAL PROTECTION EQUIP
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Problems solved by technology

[0002] In the oilfield sewage treatment, the number of bacteria in the water is strictly limited. Excessive bacteria in the sewage not only aggravate the corrosion rate of the pipeline, shorten the service life of the pipeline, but also block the underground reservoir. There are intervals between dosing time, which cannot be continued, and due to the cost of bacterial resistance and chemical reagents, the bactericidal effect will decrease as time increases

Method used

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  • Electrolytic sterilization method and device for oilfield sewage

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Embodiment

[0015] Embodiment: As shown in the figure, clear water enters the chemical salt tank 1, is diluted to 3.0% to 3.5% in the dilute brine tank, and enters the electrolytic cell 3 under the action of the pump, and strong oxidizing atoms are produced in the sodium hypochlorite solution after electrolysis State oxygen, the sodium hypochlorite solution and oilfield sewage are passed into the mixing reaction tank 5 for sterilization treatment, and the sterilized mixed sewage enters the filter assembly 6 for impurity removal, and the filtered sewage is reinjected through the water injection pump. According to calculations, the sterilization standard is also reached. Compared with adding chemical agents, the device of the present invention can save production cost of 0.39 yuan per ton of water.

[0016] The electrolytic sterilizing device for oilfield sewage in the embodiment of the present invention can continuously sterilize, prevent bacteria from developing drug resistance, have a hig...

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Abstract

The invention discloses an electrolytic sterilization method and device for oilfield sewage, and belongs to the field of oilfield oily sewage treatment. For the problem that bacterial resistance is easily produced in the existing oilfield sewage sterilization process, the invention provides an electrolytic sterilization method and device for oilfield sewage, which avoid bacterial resistance, have a stable sterilization effect, can realize continuous sterilization and have low sterilization cost compared with a chemical sterilization method. The method comprises the steps of performing electrolysis to produce a sodium hypochlorite solution, reacting the sodium hypochlorite solution produced by electrolysis with the oilfield sewage in a mixed reaction tank, and filtering the reacted sewage, wherein the pH value of the sewage entering the mixed reaction tank is 6.5-7.5, and the concentration of the sodium hypochlorite solution entering an electrolytic bath is 3.0-3.5%.

Description

technical field [0001] The invention belongs to the field of oily sewage treatment in oil fields. Background technique [0002] In oilfield sewage treatment, the number of bacteria in water is strictly limited. Excessive bacteria in sewage not only aggravate the corrosion rate of pipelines, shorten the service life of pipelines, but also block underground reservoirs. Oilfields use conventional methods of adding chemical agents for treatment. There are intervals between dosing time, which cannot be continued, and due to the cost of bacterial resistance and chemical reagents, the bactericidal effect will decrease as time increases. Contents of the invention [0003] The purpose of the present invention is to provide a method and its device capable of continuous sterilization without producing drug resistance. [0004] The present invention is realized through the following technical solutions: a method for electrolytic sterilization of oilfield sewage, characterized in that...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/467C02F103/10
CPCC02F1/4672C02F2103/10C02F2201/461
Inventor 陆强
Owner XIAN HUALU ENVIRONMENTAL PROTECTION EQUIP
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