Full
Outline
To further reduce the oil concentration in the water outlet of the cyclone pre‑separation device and to lessen the load of subsequent treatment，a novel mixed‑flow hydrocyclone structure was proposed.Its performance was systematically investigated through numerical simulation and experimental validation methods.The results indicate that when the oil phase density is below 890 kg/m³，the oil viscosity is less than 75 mPa⋅s，and the inlet water cut ranges from 75% to 99%，the device can achieve performance indicators of a water separation efficiency greater than 50% and an oil concentration in the water outlet below 200 mg/L.When the inlet water cut is between 70% and 75%，the split ratio can be adjusted in the range of 0.55 to 0.65 with the oil concentration at the water cut below 400 mg/L.When the inlet water cut is not less than 75%，the split ratio can be adjusted from 0.4 to 0.6 with the oil concentration in the water outlet below 200 mg/L.The proposed mixed‑flow hydrocyclone demonstrates excellent separation performance under different water cut conditions.The research can provide an effective way for efficient pre‑separation of produced fluids from high‑water‑cut oil wells.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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