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Outline
Based on the issues of low separation accuracy and high pressure drop in existing deep purification processes for produced compressed air，this study proposes an integrated wellhead sand and liquid removal device for compressed air energy storage applications，which couples multiple separation mechanisms including sedimentation，wet capture，and filtration.The effects of gas flow rate，inlet sand concentration，inlet liquid concentration，and sand particle size on separation performance were systematically investigated.The results indicate that as gas flow rate and inlet sand concentration increase，both sand and liquid removal efficiencies first rise and then decline，while pressure drop increases；the maximum sand and liquid removal efficiencies reach 99.92% and 99.96%，respectively，with a minimum pressure drop of 0.46 kPa.As inlet liquid concentration increases，sand removal efficiency first increases and then decreases，liquid removal efficiency increases，and pressure drop rises；the maximum sand and liquid removal efficiencies are 99.90% and 99.98%，respectively，with a minimum pressure drop of 1.03 kPa.When treating sand particles with larger diameters，the device achieves higher sand and liquid removal efficiencies and a lower pressure drop.Under all tested conditions，liquid removal efficiency exceeds 99.53%，sand removal efficiency exceeds 99.74%，and pressure drop remains below 6.72 kPa.The separation efficiencies for particles of 5 μm and 10 μm are higher than 97.27% and 99.01%，respectively.The recommended operating conditions are gas flow rates of 165~240 m³/h，inlet sand concentrations of 0.45~0.9 kg/m³，and inlet liquid concentrations of 1.3~7 kg/m³，within which the device maintains high sand and liquid removal efficiencies and relatively low pressure loss.The proposed integrated wellhead sand and liquid removal device can effectively remove sand particles and liquid droplets entrained in compressed air，thereby ensuring operational safety for downstream energy conversion equipment and providing a technical reference for air purification in compressed air energy storage systems utilizing abandoned oil and gas reservoirs.
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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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