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Method for treating low-temperature oily wastewater with strong oxidant

A technology for strong oxidants and oily sewage, applied in the direction of oxidized water/sewage treatment, chemical instruments and methods, multi-stage water/sewage treatment, etc. Flushing workload and other issues

Inactive Publication Date: 2012-05-09
张振飞
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  • Application Information

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Problems solved by technology

However, when the temperature of the incoming water is low, the effect of oil-water separation is not good after being treated according to the current devices and methods of various sewage stations in Zhongyuan Oilfield. The water injection index has been reached, and the workload of sewage discharge and backwashing in sewage stations has been increased.

Method used

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  • Method for treating low-temperature oily wastewater with strong oxidant
  • Method for treating low-temperature oily wastewater with strong oxidant
  • Method for treating low-temperature oily wastewater with strong oxidant

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Experimental program
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Embodiment Construction

[0008] Take the sewage before treatment from the sewage station on site, accurately measure 2000ml water samples and put them in a 2000ml beaker, and add various sewage treatment chemicals according to the experimental requirements under stirring at a speed of 150r / min. After completing the above operations, continue to stir at 150r / min for 1min, then stir at 35r / min for 3min, and let it stand for 15min. Take the upper layer of water, sand filter it, and put it in a beaker to analyze various indicators.

[0009] Table 2 Different methods of treating low temperature oily sewage water quality (oxidant content 25mg / L)

[0010]

[0011] It can be seen from Table 2 that after improving the technology of low-temperature oily sewage, Fe, S 2- , SRB, TGB and other indicators are better than the traditional technology, indicating that the improved technology can weaken the impact of temperature drop on water quality, and reach the A2 standard of SY / T5329-94 "Recommended indicators a...

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Abstract

Belonging to the technical field of new materials, the invention relates to a method for treating low-temperature oily wastewater with a strong oxidant. Directed at the actual situations of low temperature, high viscosity and great treatment difficulty in the oily wastewater of oil fields at a later development stage, the invention puts forward a new technology for treating low-temperature oily wastewater. By adding chemical agents that are different from agents used in conventional wastewater treatment, as well as changing original water treatment processes, the method of the invention makes the treated water completely satisfy the requirements of injection water, and simultaneously can obtain enormous economic and environmental benefits.

Description

[0001] At present, Zhongyuan Oilfield has been developed to the late stage, and the water injection volume has increased sharply. The water produced by the oil well can no longer meet the demand for water injection volume, and most of the insufficient water is replenished with fresh water in the formation. Especially in the low temperature season, the temperature of incoming water in the station will be lower, the temperature of oily sewage is low, the viscosity is high, and the difficulty of treatment increases, resulting in the reduction of the effect of sewage treatment chemicals, and the water quality cannot meet the requirements of water injection, which increases the Sewage discharge and backwash workload of sewage station. Aiming at the new problems in the process of oil field sewage treatment, the invention combines the actual work and experimentally researches a new technology for low temperature oily sewage treatment. technical field [0002] The invention belongs to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F1/72
Inventor 张振飞
Owner 张振飞
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