Electric desalting wastewater(EDW)is one of the petrochemical wastewater generated in the production process of petrochemical industry,due to the instability of its water quality,the traditional wastewater treatment t...Electric desalting wastewater(EDW)is one of the petrochemical wastewater generated in the production process of petrochemical industry,due to the instability of its water quality,the traditional wastewater treatment technology is complex,high energy consumption,and will produce waste causing secondary pollution,posing challenges in terms of environmental protection,technology,and economy.This study utilized an on-site test to investigate the possibility of a new short-process physical method to replace traditional electro-chemical,oil-separation,and two-stage air floating physical chemistry processes,in response to optimizing the treatment effect,thus reducing the cost of treatment and carbon emissions.Following this test,this new short-flow physical method process could improve the efficiency of oil and suspend solid(SS)removal by 15.48%and 58.72%,and providing 78.37%and 75.55%the operating costs and carbon emissions savings,respectively.This system also reduced the production of waste solids,volatile organic compounds,and other three-waste compared with the traditional process.These benefits offer environmental and economic advantages,and this process serves as an efficient strategy to treat wastewater for electric desalination,and can be served as a completely new technological and process option for the treatment of EDW.展开更多
A technology of ultrasonic-electric united desalting and dewatering of crude oil is studied. The ultrasonic setup is designed to form a standing-wave field, which is more efficient for agglomeration of water particles...A technology of ultrasonic-electric united desalting and dewatering of crude oil is studied. The ultrasonic setup is designed to form a standing-wave field, which is more efficient for agglomeration of water particles. The desalting and dewatering results of the ultrasonic-electric united process are compared with those of the electric process. For high salt-contenting crude oil （40-70 mg·L ^-1）, the salt content is still above 10.0 mg·L^-1 after crude oil has been treated by two-stage electric desalting process in refinery, which cannot meet the need of refinery. Ultrasonic-electric united process is a novel technology for treating the high salt-contenting oil. On the optimal operating conditions of the ultrasonic-electric united process, the salt content of crude oil can be reduced from 67 5 mg·L^-1 to 3.97 mg·L ^-1 by one-stage ultrasonic-electric united process, and the water content falls below 0.3% （by volume）. The results show that the ultrasonic-electric united process is more effective than the electric process in high salt-contenting oil desalting. This technology should be useful in the refinery process.展开更多
The internal structure of electric desalting vessels is an important factor affecting the performance of crude oil dehydration and desalination.The flow and distribution of oil-water emulsions are generally not fully ...The internal structure of electric desalting vessels is an important factor affecting the performance of crude oil dehydration and desalination.The flow and distribution of oil-water emulsions are generally not fully considered in the traditional design of a desalter.Computational fluid dynamics(CFD)simulations enable a deep understanding of oil-water two-phase flows,thereby providing a scientific basis for optimizing structural design of desalters.In this paper,CFD simulations are used to study the flow of oil-water two-phase fluid in a desalting vessel with advection squirrel-cage structure in a SINOPEC refinery,revealing the defects in its electric field layout.A structural improvement scheme is then proposed,and a medium-scale bypass test is conducted.The test results show that the single-stage salt removal rate is increased from 85.4%to 92.1%.The water and salt contents in desalted oil and the oil content in brine are also significantly improved,providing a solid foundation for transformation of the related industrial equipment.展开更多
基金supported by the National Natural Science Foundation of China(Nos.52300086 and 52025103)the Postdoctoral Fellowship Program of CPSF(No.GZB20230215).
文摘Electric desalting wastewater(EDW)is one of the petrochemical wastewater generated in the production process of petrochemical industry,due to the instability of its water quality,the traditional wastewater treatment technology is complex,high energy consumption,and will produce waste causing secondary pollution,posing challenges in terms of environmental protection,technology,and economy.This study utilized an on-site test to investigate the possibility of a new short-process physical method to replace traditional electro-chemical,oil-separation,and two-stage air floating physical chemistry processes,in response to optimizing the treatment effect,thus reducing the cost of treatment and carbon emissions.Following this test,this new short-flow physical method process could improve the efficiency of oil and suspend solid(SS)removal by 15.48%and 58.72%,and providing 78.37%and 75.55%the operating costs and carbon emissions savings,respectively.This system also reduced the production of waste solids,volatile organic compounds,and other three-waste compared with the traditional process.These benefits offer environmental and economic advantages,and this process serves as an efficient strategy to treat wastewater for electric desalination,and can be served as a completely new technological and process option for the treatment of EDW.
文摘A technology of ultrasonic-electric united desalting and dewatering of crude oil is studied. The ultrasonic setup is designed to form a standing-wave field, which is more efficient for agglomeration of water particles. The desalting and dewatering results of the ultrasonic-electric united process are compared with those of the electric process. For high salt-contenting crude oil （40-70 mg·L ^-1）, the salt content is still above 10.0 mg·L^-1 after crude oil has been treated by two-stage electric desalting process in refinery, which cannot meet the need of refinery. Ultrasonic-electric united process is a novel technology for treating the high salt-contenting oil. On the optimal operating conditions of the ultrasonic-electric united process, the salt content of crude oil can be reduced from 67 5 mg·L^-1 to 3.97 mg·L ^-1 by one-stage ultrasonic-electric united process, and the water content falls below 0.3% （by volume）. The results show that the ultrasonic-electric united process is more effective than the electric process in high salt-contenting oil desalting. This technology should be useful in the refinery process.
基金supported by the SINOPEC research project“Research and development of electric desalting technology and equipment for heavy crude oil”(Project No.318020-9).
文摘The internal structure of electric desalting vessels is an important factor affecting the performance of crude oil dehydration and desalination.The flow and distribution of oil-water emulsions are generally not fully considered in the traditional design of a desalter.Computational fluid dynamics(CFD)simulations enable a deep understanding of oil-water two-phase flows,thereby providing a scientific basis for optimizing structural design of desalters.In this paper,CFD simulations are used to study the flow of oil-water two-phase fluid in a desalting vessel with advection squirrel-cage structure in a SINOPEC refinery,revealing the defects in its electric field layout.A structural improvement scheme is then proposed,and a medium-scale bypass test is conducted.The test results show that the single-stage salt removal rate is increased from 85.4%to 92.1%.The water and salt contents in desalted oil and the oil content in brine are also significantly improved,providing a solid foundation for transformation of the related industrial equipment.
