Method for sterilizing oil field sewage by cooperating electrochemical oxidation with ultraviolet and ultrasonic technology

A technology of oilfield sewage and sterilization methods, which is applied in the fields of chemical instruments and methods, sterilization/microdynamic water/sewage treatment, light water/sewage treatment, etc., and can solve the problem of easy drug resistance of harmful microorganisms and easy corrosion of equipment and pipe networks Scaling, harmful bacteria are easy to reproduce and other problems, to reduce clogging, improve light transmittance, and enhance the effect of sterilization

Inactive Publication Date: 2013-06-12
广州金川环保设备有限公司
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  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In view of the shortcomings of the sterilization method in the traditional oilfield sewage treatment technology: (1) Secondary pollution by adding drugs for sterilization; (2) The sterilization effect is not long-lasting, and harmful bacteria are easy to reproduce; (3) Harmful microorganisms are easy to produce drug resistance (4) Equipment and pipe networks are prone to corrosion and fouling. The present invention discloses a method for sterilizing oilfield sewage by electrochemical oxidation combined with ultraviolet and ultrasonic technology.

Method used

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  • Method for sterilizing oil field sewage by cooperating electrochemical oxidation with ultraviolet and ultrasonic technology
  • Method for sterilizing oil field sewage by cooperating electrochemical oxidation with ultraviolet and ultrasonic technology
  • Method for sterilizing oil field sewage by cooperating electrochemical oxidation with ultraviolet and ultrasonic technology

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Embodiment example 1

[0040] Incoming water quality of an oilfield sewage station: pH = 6.2, dissolved oxygen (DO) = 1.036 mg / L, total iron: 43 mg / L, divalent sulfur: 2.7 mg / L, suspended solids = 51 mg / L , oil content: 153 mg / L, MF = 0, SRB = 10 3 pcs / ml, TGB = 10 3 pcs / ml, FB=10 3 perml, the average corrosion rate is 0.6902 mm / a, and the quality of incoming water shows high iron content, high salinity, and strong corrosion and scaling.

[0041] The oilfield sewage sterilization method using electrochemical oxidation combined with ultraviolet and ultrasonic technology is used to treat the oilfield sewage, and the treatment flow rate is 15 m 3 / h, the wavelength of ultraviolet rays is 185 nm, the frequency of ultrasonic waves is 20 KHz, 10 pairs of electrodes are connected in parallel, the distance between each pair of cathode and anode is 7mm, the anode material is titanium, the cathode material is platinum, and the thickness of the cathode plate is 5 mm, the current density is 5 A / m 2 . Duri...

Embodiment example 2

[0045] For an oilfield sewage station, the incoming water quality indicators are: PH = 6.6, dissolved oxygen = 1.028 mg / L, total iron: 47 mg / L, divalent sulfur: 3.7 mg / L, suspended solids = 53 mg / L, oil content: 144 mg / L, MF = 0, SRB = 10 3 pcs / ml, TGB = 10 3 pc / ml, iron bacteria=10 3 per ml, the average corrosion rate is 0.668 mm / a, and the quality of incoming water shows high iron content, high salinity, and strong corrosion and scaling.

[0046] The oilfield sewage sterilization method using electrochemical oxidation combined with ultraviolet and ultrasonic technology is used to treat the oilfield sewage, and the treatment flow rate is: 110 m 3 / h, the wavelength of ultraviolet rays is 254 nm, the frequency of ultrasonic waves is 250 KHz, 12 pairs of electrodes are connected in parallel, the distance between each pair of cathode and anode is 8 mm, the anode material is titanium, the cathode material is graphite, and the cathode plate Thickness: 40 mm, current density:...

Embodiment example 3

[0050] For an oilfield sewage station, the incoming water quality indicators are: PH = 6.0, dissolved oxygen = 1.030 mg / L, total iron: 40 mg / L, divalent sulfur: 2.2mg / L, suspended solids = 51 mg / L, oil content: 157 mg / L, MF = 0, SRB = 10 3 pcs / ml, TGB = 10 3 pcs / ml, iron bacteria=10 3 perml, the average corrosion rate is 0.680 mm / a, and the quality of incoming water shows high iron content, high salinity, and strong corrosion and scaling.

[0051] The oilfield sewage sterilization method using electrochemical oxidation combined with ultraviolet and ultrasonic technology is used to treat the oilfield sewage, and the treatment flow rate is: 200 m 3 / h, the wavelength of ultraviolet rays: 365 nm, the frequency of ultrasonic waves: 400 KHz, 10 pairs of electrodes are connected in parallel, the distance between each pair of cathode and anode is 16 mm, the anode material is graphite, the cathode material is graphite, the anode, The thickness of the cathode plate is 35 mm, and ...

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Abstract

The invention relates to a method for sterilizing oil field sewage by cooperating electrochemical oxidation with an ultraviolet and ultrasonic technology and belongs to treatment of the oil field sewage. The method comprises the following steps of: (1) electrolyzing, wherein available chlorine can be generated from the sewage, the current density is in the range of 5 to 3,000A / m2 and the concentration of the available chlorine is in the range of 0.1 to 40mg / L; (2) carrying out ultrasonic-ultraviolet compound treatment and degerming by cooperating the available chlorine with the ultrasonic cavatition and ultraviolet irradiation, wherein the frequency of ultrasonic waves is in the range of 20 to 500KHz and the wavelength of ultraviolet rays is in the range of 100 to 400nm; and (3) washing aquartz socket tube by cooperating chlorine generated by electrolysis with the chemical cleaning effect of the ultrasonic waves. The method is mainly characterized in that (1) the available chlorine is generated by electrochemical oxidation to carry out primary sterilization; (2) the residual chlorine is cooperated with the ultrasonic cavatition and the ultraviolet irradiation to completely sterilize; (3) after treatment, the residual chlorine in a water body is used to continuously sterlize; and (4) the chlorine generated by electrolysis is cooperated with the ultrasonic cavatition to preventscale from depositing on the surface of the quartz socket tube of an ultraviolet lamp.

Description

technical field [0001] The invention relates to a method for sterilizing oilfield sewage by electrochemical oxidation combined with ultraviolet and ultrasonic technology, and belongs to the technical field of sewage treatment in oilfield exploitation and production. Background technique [0002] The exploitation and utilization of oil is an important source of the rapid development of my country's national economy. With the continuous deepening of my country's new industrialization road, at present, most oil fields in the country have gradually entered the secondary recovery period. After oilfield exploitation enters the stage of secondary oil recovery, oilfield water injection runs through the entire process of oilfield development, covering many tasks such as production fluid treatment, sewage purification, and sewage reinjection. In this process, water injection development is the focus of improving the ultimate oil recovery and development benefits of oilfields. Oilfie...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/08C02F1/32C02F1/36C02F1/467C02F103/10
Inventor 温镜新莫光权
Owner 广州金川环保设备有限公司
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