Apparatus for treating sewage containing oil, and processing technique

A treatment device and technology for oily sewage, applied in water/sewage treatment, flotation water/sewage treatment, oxidized water/sewage treatment, etc., can solve the problems of high investment cost, large floor area, high energy consumption and material consumption , to achieve the effect of less scum, high degree of automation and strong adaptability

Inactive Publication Date: 2007-10-10
UNIV OF SCI & TECH BEIJING
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Problems solved by technology

[0011] The purpose of the present invention is to solve the problems of large floor area, high energy and material consumption, and high investment costs, and to invent an oily sewage treatment device, which uses electrocoagulation, electric floatation and ozone ultrasonic enhanced oxidation to solve the treatment of oily sewage problem, so that the treated oily sewage reaches the standard stably

Method used

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  • Apparatus for treating sewage containing oil, and processing technique

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Embodiment 1

[0018] This technology is used in the industrial sewage of an oil refinery. The water quality before treatment is: oil 100mg / l, COD 1211mg / l. The treatment capacity is 2 tons / hour, using the device shown in Figure 1, the voltage of the electrocoagulation tank is 500V, the hydraulic retention time is 15 minutes, the voltage of the electric floating tank is 500V, the hydraulic retention time is 15 minutes, the power of the ultrasonic scale inhibitor is 10 watts, and the pump outlet Pressure 0.3 MPa, ozone flow rate 10 g / h, gas-liquid mixer mixing pressure difference 0.03 MPa, ultrasonic enhanced oxidizer 0.3 W / cm 2 , The residence time of the reaction tank is 10 minutes, and the water quality after treatment is COD100mg / l and oil 5mg / l.

Embodiment 2

[0020] Oily sewage in an oilfield, oil 510mg / l, COD2210mg / l, suspended solids 130mg / l before treatment, using the device shown in Figure 1, the voltage of electrocoagulation tank 1 is 5V, the voltage of electric floating tank is 5V, and the power of ultrasonic scale inhibitor is 10 Watts, pump outlet pressure 0.8 MPa, ozone flow rate 15 g / h, gas-liquid mixer mixing pressure difference 0.08 MPa, ultrasonic enhanced oxidizer 5W / cm 2 , The residence time of the reaction tank is 10 minutes, and the water quality after treatment is COD100mg / l and oil 5mg / l. The water quality after treatment is: oil 4.5mg / l, COD 80mg / l, suspended matter 18mg / l.

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Abstract

This invention discloses apparatus and process for treating oil-containing wastewater. The apparatus is composed of an electric flocculation tank, an electric floatation tank, an ozone- and ultrasonic-enhanced oxidation device, and a reaction tank. Electric flocculation and electric floatation are adopted to remove oil and suspended substances. Ozone- and ultrasonic-enhanced oxidation is adopted to remove COD by degrading organic matters. The process has such advantages as stable operation, no need for chemical reagents, small floor area, and high automation. Treated oil-containing wastewater is qualified for discharge.

Description

Technical field: [0001] The invention belongs to the technical field of sewage treatment, and mainly relates to an oily sewage treatment device and a treatment process, which can be used for sewage treatment in the process of petroleum development and transportation, and can be used for sewage treatment of crude oil in refineries and petrochemical plants, and can also be used for Chemical sewage treatment. Background technique: [0002] Oily sewage is a large and wide-ranging pollution source. According to relevant data, at least 5-10 million tons of oil enter water bodies through various channels every year in the world. Oily sewage comes from a wide range of sources, mainly from petroleum, petrochemical, steel, coking, gas generation stations, machinery and other industrial enterprises. In addition, oily sewage is produced in railway transportation, textile and light industries. [0003] Oil in oily sewage generally exists in water in three states: (1) Suspended oil: The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/08C02F1/52C02F1/465C02F1/463C02F1/78C02F1/40C02F1/36C02F103/10
Inventor 娄世松陈要君范洪波
Owner UNIV OF SCI & TECH BEIJING
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