The motion law of oil droplets and bubbles in air flotation-cyclone
Microbubble air flotation cyclone technology is an innovative and efficient separation method combining flotation separation and cyclone separation. Using this technology for oil-water separation, the effects of dissolved gas water microbubbles, cyclone fields, and flocculants on separation efficien...
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Editorial Office of Industrial Water Treatment
2025-01-01
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| Series: | Gongye shui chuli |
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| Online Access: | https://www.iwt.cn/CN/10.19965/j.cnki.iwt.2023-1196 |
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| author | WANG Wei BAI Xu CHU Xiaodan ZHAO Xiang MA Xueliang LIN Wei GONG Cheng YU Jiuyang |
| author_facet | WANG Wei BAI Xu CHU Xiaodan ZHAO Xiang MA Xueliang LIN Wei GONG Cheng YU Jiuyang |
| author_sort | WANG Wei |
| collection | DOAJ |
| description | Microbubble air flotation cyclone technology is an innovative and efficient separation method combining flotation separation and cyclone separation. Using this technology for oil-water separation, the effects of dissolved gas water microbubbles, cyclone fields, and flocculants on separation efficiency were investigated. High-speed imaging technology was utilized to study the interaction between microbubbles and oil droplets, as well as between microbubbles and flocs. The results showed that dissolved gas water microbubbles significantly reduced oil-water separation time, cutting it by 50% compared to static settling in pure water. At an initial oil-water mixture concentration of 400 mg/L, the optimal experimental conditions for the combined flotation+cyclone+flocculant process were: Oil-water mixture to dissolved gas water volume ratio of 1∶4, cyclone velocity of 370 r/min, composite flocculant ratio (PAC∶CPAM) of 2∶1. Under these conditions, the final oil concentration in wastewater was less than 10 mg/L, meeting the requirements of the Integrated Wastewater Discharge Standard (GB 8978-1996). In static water conditions, the average projected area of microbubble-floc aggregates was approximately six times that of microbubble-oil droplet aggregates, indicating that the addition of flocculants was conducive for improving oil-water separation. Interaction experiments demonstrated that, compared to pure water static settling, oil content in wastewater decreased by 38.7%, 71.4%, and 76.5% after treatment using microbubble air flotation, flotation+cyclone, and flotation+cyclone+flocculants, respectively. The final oil-water separation effectiveness was in order of three-factor combination>dissolved gas water microbubbles +cyclone field>dissolved gas water microbubbles alone. |
| format | Article |
| id | doaj-art-37bef51d19a1461ab3845f1ff85082bf |
| institution | Kabale University |
| issn | 1005-829X |
| language | zho |
| publishDate | 2025-01-01 |
| publisher | Editorial Office of Industrial Water Treatment |
| record_format | Article |
| series | Gongye shui chuli |
| spelling | doaj-art-37bef51d19a1461ab3845f1ff85082bf2025-01-24T07:59:03ZzhoEditorial Office of Industrial Water TreatmentGongye shui chuli1005-829X2025-01-0145111512210.19965/j.cnki.iwt.2023-11961005-829X（2025）01-0115-08The motion law of oil droplets and bubbles in air flotation-cycloneWANG Wei0BAI Xu1CHU Xiaodan2ZHAO Xiang3MA Xueliang4LIN Wei5GONG Cheng6YU Jiuyang7College of Mechanical and Electrical Engineering, Wuhan Institute of Technology, Wuhan430010, ChinaCollege of Mechanical and Electrical Engineering, Wuhan Institute of Technology, Wuhan430010, ChinaShale Gas Exploitation Technology Service Company, Sinopec Jianghan Petroleum Engineering Co., Ltd., Wuhan430010, ChinaCollege of Mechanical and Electrical Engineering, Wuhan Institute of Technology, Wuhan430010, ChinaCollege of Mechanical and Electrical Engineering, Wuhan Institute of Technology, Wuhan430010, ChinaCollege of Mechanical and Electrical Engineering, Wuhan Institute of Technology, Wuhan430010, ChinaCollege of Mechanical and Electrical Engineering, Wuhan Institute of Technology, Wuhan430010, ChinaCollege of Mechanical and Electrical Engineering, Wuhan Institute of Technology, Wuhan430010, ChinaMicrobubble air flotation cyclone technology is an innovative and efficient separation method combining flotation separation and cyclone separation. Using this technology for oil-water separation, the effects of dissolved gas water microbubbles, cyclone fields, and flocculants on separation efficiency were investigated. High-speed imaging technology was utilized to study the interaction between microbubbles and oil droplets, as well as between microbubbles and flocs. The results showed that dissolved gas water microbubbles significantly reduced oil-water separation time, cutting it by 50% compared to static settling in pure water. At an initial oil-water mixture concentration of 400 mg/L, the optimal experimental conditions for the combined flotation+cyclone+flocculant process were: Oil-water mixture to dissolved gas water volume ratio of 1∶4, cyclone velocity of 370 r/min, composite flocculant ratio (PAC∶CPAM) of 2∶1. Under these conditions, the final oil concentration in wastewater was less than 10 mg/L, meeting the requirements of the Integrated Wastewater Discharge Standard (GB 8978-1996). In static water conditions, the average projected area of microbubble-floc aggregates was approximately six times that of microbubble-oil droplet aggregates, indicating that the addition of flocculants was conducive for improving oil-water separation. Interaction experiments demonstrated that, compared to pure water static settling, oil content in wastewater decreased by 38.7%, 71.4%, and 76.5% after treatment using microbubble air flotation, flotation+cyclone, and flotation+cyclone+flocculants, respectively. The final oil-water separation effectiveness was in order of three-factor combination>dissolved gas water microbubbles +cyclone field>dissolved gas water microbubbles alone.https://www.iwt.cn/CN/10.19965/j.cnki.iwt.2023-1196micro-bubblesair flotation-cyclone processoilfield produced wateroil-water separation |
| spellingShingle | WANG Wei BAI Xu CHU Xiaodan ZHAO Xiang MA Xueliang LIN Wei GONG Cheng YU Jiuyang The motion law of oil droplets and bubbles in air flotation-cyclone Gongye shui chuli micro-bubbles air flotation-cyclone process oilfield produced water oil-water separation |
| title | The motion law of oil droplets and bubbles in air flotation-cyclone |
| title_full | The motion law of oil droplets and bubbles in air flotation-cyclone |
| title_fullStr | The motion law of oil droplets and bubbles in air flotation-cyclone |
| title_full_unstemmed | The motion law of oil droplets and bubbles in air flotation-cyclone |
| title_short | The motion law of oil droplets and bubbles in air flotation-cyclone |
| title_sort | motion law of oil droplets and bubbles in air flotation cyclone |
| topic | micro-bubbles air flotation-cyclone process oilfield produced water oil-water separation |
| url | https://www.iwt.cn/CN/10.19965/j.cnki.iwt.2023-1196 |
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