Full
Outline
To improve the separation performance of a spiral pipe separator，a novel two‑stage cyclone separator using a spiral pipe assembly as the feed channel was developed.The structural parameters of the device were optimized through orthogonal experiments，and the optimal structure was determined as follows：the spiral pipe has one turn，the ratio of the curvature radius to the cyclone body radius is 0.76，and the outlet of the spiral pipe is located one pipe diameter below the interface between the cylindrical and conical sections of the separator.The separation performance before and after optimization was compared using numerical simulation methods，and validation experiments were conducted on the optimized structure.The results show that after optimization，the pressure distribution in the central region of the device becomes more uniform，the negative pressure region shrinks significantly，and the pressure loss is reduced.The swirling velocity increases，the centrifugal force is enhanced，promoting particle movement toward the wall，thereby strengthening liquid-solid separation.With the radial position r/R=0.5 as the boundary，the average solid phase concentration on the side near the wall increases by 5.1%，while the average concentration in the central region of the separator decreases by 28%.The residence time of solid particles inside the cyclone is shortened，and the number of particles escaping from the overflow port is reduced.The optimization of the spiral pipe structural parameters enhances the flow near the wall in the secondary cyclone region while reducing the disturbance to the central fluid，which is beneficial for the liquid-solid separation process in the two‑stage cyclone separator.This study can provide a reference for the engineering design and application of two‑stage cyclone separators.
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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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