Full
Outline
In order to solve the problems of high energy consumption, material accumulation in the air duct, and local wear in the swing mill, an analysis was conducted on the existing structures of the intake air duct, including volute and air duct blades. Based on fluid dynamics, multiphase flow, and discrete element coupling simulation technology, numerical simulations were conducted on the internal wind and particle fields of a pendulum mill. Response surface simulation tests were conducted on the volute shape, the blades angle of air duct, and the blades number of air duct. The results show that optimizing the volute shape is beneficial for reducing pressure loss and equipment energy consumption. Reasonable selection of blade angle and number is beneficial for reducing the uneven coefficient of air flow velocity in the air duct and regulating the flow field. Based on multi-objective optimization of pressure loss and non-uniformity coefficient, the optimal solution for the air duct structure was determined as volute shape of 2, blades numbers of 18, and blade angle of 55°. The collection efficiency of finished particles in the optimized scheme is as high as 95.3%, which is 13.5% higher than that of the original scheme. The simulation results are consistent with the field test data, which can provide a guidance for the structural optimization design of the pendulum mill.
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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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