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Wang, Xingwang
- Research on Flow Field Distribution and Structure Improvement of Gravity Sedimentation Tank Contained Polymer Sewage in Oilfield
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Authors
Affiliations
1 Key Laboratory of Enhanced Oil Recovery (Ministry of Education), Northeast Petroleum University, Daqing, CN
2 Shandong Oil Transportation Co., Ltd of PetroChina, Rizhao, CN
1 Key Laboratory of Enhanced Oil Recovery (Ministry of Education), Northeast Petroleum University, Daqing, CN
2 Shandong Oil Transportation Co., Ltd of PetroChina, Rizhao, CN
Source
Nature Environment and Pollution Technology, Vol 16, No 1 (2017), Pagination: 225-230Abstract
Gravity sedimentation tank is the key equipment in the process of sewage treatment in oilfield, whose separation performance has a significance in the treatment effect of sewage. In order to analyse the distribution of flow field in gravity sedimentation tank, the 1200m3 gravity sedimentation tank contained polymer sewage in oilfield was simulated. The distribution characteristic of three-dimensional flow in the tank is given. Then through the analysis of fluid trace distribution and the droplets movement, the non-uniformity of the flow field in the tank and existence of swirl flow and back mixing flow are discovered. On the basis of mentioned above, taking the oil removal efficiency as the evaluation index, the structure of liquid distributing device of gravity sedimentation tank is improved. It makes the oil removal efficiency increased by 8.4%.Keywords
Gravity Sedimentation Tank, Oil-Water Separation, Flow Field Analysis, Structure Improvement, Polymer-Contained Sewage.Full Text
References
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- Study of the Influencing Factors of Sedimentation Separation of Polymer-Contained Sewage in Gravity Sedimentation Tank
Abstract Views :497 |
PDF Views:0
Authors
Affiliations
1 Key Laboratory of Enhanced Oil Recovery (Ministry of Education), Northeast Petroleum University, Daqing, CN
2 SINOPEC Petroleum Exploration and Production Research Institute, Beijing, CN
1 Key Laboratory of Enhanced Oil Recovery (Ministry of Education), Northeast Petroleum University, Daqing, CN
2 SINOPEC Petroleum Exploration and Production Research Institute, Beijing, CN
Source
Nature Environment and Pollution Technology, Vol 17, No 2 (2018), Pagination: 367-374Abstract
Gravity sedimentation tank is one of the key equipment in the process of oil field sewage treatment, whose separation performance directly affects the treatment efficiency. Polymer-contained sewage is difficult to deal with for its characteristics of large viscous and serious oil-water emulsification. In order to improve the treatment efficiency, we carried out a series of numerical simulation and experimental researches to analyse the separation law and the influencing factors of polymer-contained sewage in gravity sedimentation tank. The results show that flow vortexes exist in the gravity sedimentation tank, and the aqueous phase envelops part of the oil droplets, flows out of the tank from the wateroutlet, thus affecting the treatment efficiency. The oil content and suspended solid content in the treated sewage decrease with the prolonging of the sedimentation time. With the increasing of polymer concentration in the raw water, the diameter of emulsifying oil droplets become smaller and the oil removal rate decreases at the same sedimentation time. By prolonging the sedimentation time appropriately, the treatment efficiency of the polymer-contained sewage can be improved.Keywords
Gravity Sedimentation Tank, Influencing Factors, Polymer-Contained Sewage, Oil-Water Separation.Full Text
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