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Finished oil depot sewage treatment system and sewage treatment method thereof

A sewage treatment system and oil depot technology, applied in water/sewage treatment, water/sewage multi-stage treatment, biological water/sewage treatment, etc., can solve the problems of oil recovery without consideration, and achieve the effect of reducing treatment costs

Inactive Publication Date: 2018-05-15
CNOOC ENERGY TECH & SERVICES +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The domestic treatment of oily sewage is mainly based on oil removal, with the goal of achieving the discharge of waste water up to the standard, without considering the recovery of oil

Method used

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  • Finished oil depot sewage treatment system and sewage treatment method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The technology of the present invention is used to treat the diesel tank cutting water of Offshore Oil Yangjiang Industrial Co., Ltd., and the treatment scale is 4.5m 3 / h. The oily sewage is homogeneously regulated in the regulating tank 1 and then lifted to the ceramic-based functional membrane device 3 by the functional membrane inlet pump 2, and the flow rate of the oily concentrated water is controlled at 1.5m 3 / h, the flow rate of product water is 3m 3 / h, the concentration ratio is 3, and the water production rate reaches 66.7%; the produced water enters the integrated membrane bioreactor 4 together with the reflux water from the ozone catalytic oxidation tower 6, and the hydrolysis and acidification section, the aerobic section and the membrane bioreactor section. The hydraulic retention time is 18h, 12h and 6h respectively; the water from the membrane bioreaction section reaches the ozone catalytic oxidation tower 6, the hydraulic retention time is 3h, the oz...

Embodiment 2

[0039] Adopt the technology of the present invention to process the cutting water of the gasoline tank of CNOOC Yangjiang Industrial Co., Ltd., and the treatment scale is 5m 3 / h. The cutting water of the gasoline tank is mixed in the regulating tank 1 and then lifted to the ceramic-based functional membrane device 3 by the functional membrane water inlet pump 2, and the flow rate of the oily concentrated water is controlled at 0.5m 3 / h, the water flow rate is 4.5m 3 / h, the concentration ratio is 10, and the water production rate reaches 90%; the produced water enters the integrated membrane bioreactor 4 together with the reflux water from the ozone catalytic oxidation tower 6, and the hydrolytic acidification section, the aerobic section and the membrane bioreaction section The hydraulic retention times are 12h, 8h and 4h respectively; the water from the membrane bioreaction section reaches the ozone catalytic oxidation tower 6, the hydraulic retention time is 2h, the ozon...

Embodiment 3

[0042] The technology of the present invention is used to treat the mixed sewage of gasoline tank cutting water and diesel tank cutting water of Offshore Oil Yangjiang Industrial Co., Ltd. The two kinds of sewage are mixed at a ratio of 1:1, and the total amount of sewage is 4.2m 3 / h. The two kinds of sewage are mixed in the regulating tank 1, and are lifted to the ceramic-based functional membrane device 3 by the functional membrane inlet pump 2, and the flow rate of the oily concentrated water is controlled at 0.6m 3 / h, the flow rate of product water is 3.6m 3 / h, the concentration ratio is 7, and the water production rate reaches 85.7%; the produced water enters the integrated membrane bioreactor 4 together with the reflux water from the ozone catalytic oxidation tower 6, and enters the integrated membrane bioreactor 4 in the hydrolytic acidification section, aerobic section and membrane bioreaction section The hydraulic retention times are 15h, 9.6h and 4.8h respectivel...

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Abstract

The invention discloses a finished oil depot sewage treatment system and a sewage treatment method thereof. The finished oil depot sewage treatment system comprises a regulating reservoir and a ceramic-based functional membrane device which are connected, wherein a water inlet of the regulating reservoir is connected with oily sewage; a water outlet of the ceramic-based functional membrane deviceis respectively connected with a thick oily water recovery device and an integrated membrane bio-reactor; the integrated membrane bio-reactor is provided with an air inlet connected with air and a sludge outlet connected with a sludge dewatering device; a water outlet of the integrated membrane bio-reactor is connected with a catalytic ozonation tower; the catalytic ozonation tower is provided with an ozone inlet connected with ozone; a water outlet of the catalytic ozonation tower is respectively connected a reflux inlet of the integrated membrane bio-reactor and a clean water basin; and a water outlet of the clean water basin is respectively connected with a water return inlet of the regulating reservoir and a clean water discharge pipeline. The finished oil depot sewage treatment systemand the sewage treatment method thereof disclosed by the invention have the advantages of effectively removing petroleum and COD pollutants, enhancing the treatment effect, realizing up-to-standard discharge of oil-gas depot sewage, and facilitating recovery of thick oil.

Description

technical field [0001] The invention relates to sewage treatment technology, in particular to a sewage treatment system and a sewage treatment method for a product oil depot. Background technique [0002] The oily sewage of refined oil depots mainly includes oil tank cleaning water, flushing water, oil tank cut-off water and initial rainwater, etc., which has the remarkable characteristics of large water volume changes, discontinuous discharge, and irregular discharge cycle. The oil content in oily sewage generally ranges from tens to thousands of milliliters, and the composition is complex, mainly existing in the wastewater in the form of dispersed oil, emulsified oil and dissolved oil. In the treatment process of oily wastewater, the first consideration should be to recover the oil in the sewage as much as possible, and secondly, the treated water should meet the environmental protection discharge requirements. [0003] The treatment of oily sewage in China is mainly base...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F101/32
CPCC02F1/001C02F1/725C02F1/78C02F3/1268C02F9/00C02F2101/32C02F2201/007C02F2301/043C02F2301/08
Inventor 罗华庆苏云陈祖能陈贤权林海钦陆彩霞何爱珍
Owner CNOOC ENERGY TECH & SERVICES
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