Interactive treating process for advance treatment and recycle of waster water from oil production

A technology for advanced treatment of oil production wastewater, applied in biological water/sewage treatment, flotation water/sewage treatment, water/sewage multi-stage treatment, etc., can solve the problems of low quality chemicals, long process, large floor area, etc. Achieve the effect of controlling water treatment cost, efficient treatment and improving effect

Inactive Publication Date: 2009-08-19
TONGJI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

In recent years, the biological treatment process has received attention and attention in the treatment of oilfield wastewater. On the basis of the original process technology route, the process is extended and biological or biochemical treatment units are added to improve the treatment effect of the system, but the process is longer. , The problem of large area; other oil production wastewater treatment processes, such as cyclone method and membrane separation method, have also carried out related research
Alth

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  • Interactive treating process for advance treatment and recycle of waster water from oil production
  • Interactive treating process for advance treatment and recycle of waster water from oil production

Examples

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Example Embodiment

[0019] Example 1: The process of the present invention mainly consists of air flotation tank 7, biological carrier packing area 8, and membrane separation area 9 (which can be combined to form an integrated degradation and separation reactor) and other main processes, including water inlet pipe 1, degreasing agent injection The inlet 2, the air supply system 3, and the water outlet pipe 4, etc. The oil production wastewater enters the water distribution area 11 of the air flotation tank 7, and a dissolved air release device 5 is provided in the water distribution area 11 to release microbubbles under high pressure conditions. After the microbubbles adhere to the oily substances, they rise to the surface of the air floatation tank 7, and pass The oil scraper 10 removes the oil residue. The high-pressure dissolved gas pipeline 6 is provided with a degreaser injection port 2 at the same time, which is released by the dissolved gas release device 5 to the water distribution area 11 to...

Example Embodiment

[0021] Example 2

[0022] The process described in Example 1 is used to treat oil production wastewater. The daily output of oil production wastewater in an oil field is 1000 tons, and the wastewater quality is: petroleum 150-220mg / L; COD 800-1400mg / L; BOD 80-140mg / L; sulfide Substance 120-400mg / L; Volatile phenol 2-9.0mg / L. Waste water is treated by this treatment process (e.g. figure 1 Shown), under the condition that the overall hydraulic retention time of the equipment is 3.5h, and the dosage of polymorphic polymer degreasing agent is 20mg / L-inlet water, use figure 2 In the case of the structural arrangement shown, the total floor area of ​​the water treatment structure is 48.6m 2 . The oil production wastewater of this oilfield is treated by this treatment process, and the treated water quality has reached the A1 standard (average air permeability of the injection layer) in the "Recommended Indexes and Analysis Methods for Water Injection Quality of Clastic Rock Reservoirs (...

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Abstract

The invention belongs to the technical field of water and wastewater treatment, and particularly relates to an interactive treatment process for the advanced treatment and reclamation of the oil extraction wastewater. The process comprises the following steps that: firstly, the oil extraction wastewater enters an air floating tank, a high efficiency multi-form polymerization deoiling agent is simultaneously added into the air floating tank, and the hydraulic power of the wastewater is retained for 0.3 to 0.5 hour in the air floating tank; the wastewater which is deoiled through air floating enters a biological carrier filler area, and a biological strain of Zoogloeasp-PX.01 capable of degrading oily wastewater with high efficiency is fixed on the biological carrier filler and can carry out the high efficiency biological degradation on the residual oil and hydrocarbons in the water; the solid-liquid separation for the outputted treated water is carried out via a membrane separation area, and the outputted water which passes the membrane separation area can be reinjected into the oil field after an environmental protection type dirt blockage agent and a corrosion inhibitor are added; and the hydraulic power detention time of the wastewater entering the biological carrier filler area and for the solid-liquid separation is 2.8 to 3 hours. The process realizes the high efficiency treatment of the oil, sulfides, organic phenols, cyanogens, and the like in the oil extraction wastewater under the conditions of a shorter hydraulic power retention time and higher volume load. The outputted water can reach or exceed the water quality standard requirements stipulated in Recommended Indexes and Analysis Methods for the Quality of Water Injected into a Clastic Rock Oil Pool(SY/T55329-94). The outputted water can be used as the oil field flooding water and reinjection water.

Description

technical field [0001] The invention belongs to the technical field of water and wastewater treatment, and in particular relates to an interactive treatment process for advanced treatment and reuse of oil production wastewater. Background technique [0002] At present, most of my country's oil fields have entered the middle and late stages of oil development, and the water content in the produced oil is 70-80%, and the water content in some oil fields even reaches 90%. According to relevant predictions, the output of produced water in my country's oilfields can reach 1 billion tons in 2010. If oil production wastewater is discharged directly without treatment, it will not only cause soil and water pollution, but sometimes even cause oil fire accidents, threatening people's lives, causing economic losses to the country, and also endangering the interests of the oil field itself. The advanced treatment of oilfield wastewater and its use for reinjection can not only meet the i...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F1/24C02F3/10C02F3/34C02F101/30C02F101/18
CPCY02W10/10
Inventor 周琪王志伟吴志超李风亭韩正海于建飞
Owner TONGJI UNIV
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