Full
Outline
To address wear issues in a catalytic cracking unit cyclone separator，a gas‑solid two‑phase erosion mathematical model was established.Numerical simulations reproduced distribution characteristics of flow parameters including velocity fields and wear rates under typical operating conditions.Combined with field failure cases，erosion mechanisms were analyzed and control solutions proposed.Results show the swirler internal flow exhibits a dual‑layer rotational structure with outer downward flow and inner upward flow.Wall thinning primarily results from combined cutting wear and deformation wear.Silica particles continuously impact the swirler top at low angles，causing severe wear with a wear rate of 6.02×10-9 kg/（m²·s）.During spiral downward movement，particles cause cutting wear on the cylinder wall.Reduced motion radius increases centrifugal force，leading to severe impact wear at the underflow orifice with a wear rate of 5.52×10-9 kg/（m²·s）.Numerical results show high consistency with field cases.Wear‑resistant electrode overlay welding extends equipment life by 3~6 months，while alumina ceramic lining extends life by over 10 months.The established wear analysis method and control strategy can be applied to failure assessment and life optimization of cyclone separator wall thinning.
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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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