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Aiming at solving the problem of complex and uneven flow field inside the coal pulverizer, a complete model of medium-speed coal pulverizer was established. The CFD software was used to solve the internal flow equation of the coal pulverizer. Moreover, DPM iteration was used to obtain particle flow parameters, and the internal flow of the medium-speed coal pulverizer and distribution characteristics of outlet air-powder at different rotation speeds of dynamic classifier were explored. The results showed that, the distribution characteristics of primary air at four pulverizer outlets were good and consistent with the test results. When the powder diameter was small, the powder mass flow deviation at four pulverizer outlets was small, and the fluctuation was not obvious with the increase of the rotation speed of the dynamic classifier. With the increase of powder diameter, the motion trajectory of powder showed a wall adherent motion, and the powder mass flow deviation at four pulverizer outlets gradually increased. Furthermore, for coal particles with large diameters, with the increase of the rotation speed of the dynamic classifier, the powder mass flow deviation at four pulverizer outlets gradually decreased.
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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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