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The Xinjiang Institute of Physics and Chemistry of the Chinese Academy of Sciences has developed oil removal technology and oil removal materials
2022/8/30
The Xinjiang Institute of Physics and Chemistry of the Chinese Academy of Sciences has recently successfully developed a magnetic material oil removal technology and photocatalytic oxidation technology, which can effectively treat polymer-containing sewage generated by oil fields, improve the water quality of reinjection sewage, make the sewage meet the reinjection formation standards, and avoid environmental pollution caused by sewage discharge.
With the gradual application of tertiary oil recovery technology in Karamay Oilfield, a large amount of polymer flooding is added in the process of oil recovery. Compared with conventional water-driven oil extraction methods, the viscosity of wastewater produced by tertiary oil recovery technology is higher, and the stability of oil droplets and solid suspended matter in water is stronger, which makes the oil-water separation and oil-containing treatment more difficult. Due to the lack of new technology, Karamay Oilfield currently uses the traditional "oil removal - demulsification - weighting - flocculation - filtration" process to treat sewage. This method not only consumes a lot of water treatment chemicals, but also produces a lot of oily sludge, resulting in a lot of waste of oil resources, and the treated sewage can not meet the re-injection formation standards.
In response to the above problems existing in Karamay oilfield, the Xinjiang Institute of Physics and Chemistry of the Chinese Academy of Sciences proposed a new process of "gravity oil removal + adsorption - magnetic separation oil removal + advanced oxidation + filtration", which focuses on the development of magnetic materials and catalysts that can separate oil and water. At present, an ultrasonic oil-soluble magnetic nanoparticle has been found, and a method of using clay to make a catalyst has been developed. By chemically modifying the clay, it can improve its adsorption and catalytic oxidation, so that pollutants can be adsorbed, catalyzed and degraded.
Wang Chuanyi, director of the environmental science and technology department at the Xinjiang Institute of Physics and Chemistry of the Chinese Academy of Sciences, said that using this technology in their laboratory, the polymer content in sewage has been reduced from 560 mg/l to 8 mg/l. Next, they will cooperate with the Dalian Institute of Chemical Sciences of the Chinese Academy of Sciences to carry out further research, develop and design the corresponding oilfield sewage treatment device, and conduct application demonstration in Karamay oilfield, and finally form Xinjiang oil recovery sewage treatment technology and resource utilization technology system. It is understood that this technology is expected to reduce the cost of Karamay's oil wastewater treatment by two yuan per ton.
With the gradual application of tertiary oil recovery technology in Karamay Oilfield, a large amount of polymer flooding is added in the process of oil recovery. Compared with conventional water-driven oil extraction methods, the viscosity of wastewater produced by tertiary oil recovery technology is higher, and the stability of oil droplets and solid suspended matter in water is stronger, which makes the oil-water separation and oil-containing treatment more difficult. Due to the lack of new technology, Karamay Oilfield currently uses the traditional "oil removal - demulsification - weighting - flocculation - filtration" process to treat sewage. This method not only consumes a lot of water treatment chemicals, but also produces a lot of oily sludge, resulting in a lot of waste of oil resources, and the treated sewage can not meet the re-injection formation standards.
In response to the above problems existing in Karamay oilfield, the Xinjiang Institute of Physics and Chemistry of the Chinese Academy of Sciences proposed a new process of "gravity oil removal + adsorption - magnetic separation oil removal + advanced oxidation + filtration", which focuses on the development of magnetic materials and catalysts that can separate oil and water. At present, an ultrasonic oil-soluble magnetic nanoparticle has been found, and a method of using clay to make a catalyst has been developed. By chemically modifying the clay, it can improve its adsorption and catalytic oxidation, so that pollutants can be adsorbed, catalyzed and degraded.
Wang Chuanyi, director of the environmental science and technology department at the Xinjiang Institute of Physics and Chemistry of the Chinese Academy of Sciences, said that using this technology in their laboratory, the polymer content in sewage has been reduced from 560 mg/l to 8 mg/l. Next, they will cooperate with the Dalian Institute of Chemical Sciences of the Chinese Academy of Sciences to carry out further research, develop and design the corresponding oilfield sewage treatment device, and conduct application demonstration in Karamay oilfield, and finally form Xinjiang oil recovery sewage treatment technology and resource utilization technology system. It is understood that this technology is expected to reduce the cost of Karamay's oil wastewater treatment by two yuan per ton.
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