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Outline
To obtain key parameters such as evaporation surface velocity, evaporation surface temperature and flow conditions of liquid metal beryllium during high-temperature vacuum distillation, and then to optimize the temperature field, flow field and equipment accordingly, Ansys Fluent was used to simulate the distributions of temperature and flow fields of liquid metal beryllium in distillation at completion rate of 5%, 20%, 40%, 60%, 80% and 95%, respectively. Four heating modes, including constant-temperature bottom heating, constant-temperature side heating, constant-temperature side-and-bottom heating and constant-power side-and-bottom heating, were compared with each other for investigating advantages and disadvantages. The results show that, compared with constant-temperature bottom heating or constant-temperature side heating, the constant-temperature side-and-bottom heating mode can effectively mitigate severe drop in the overall average temperature in the late distillation stage, which is conducive to reducing energy consumption and maintaining a stable temperature field, and also brings overall uniformity in heating. Based on a comparison, it is found that constant-temperature heating mode is better than constant-power heating in terms of average temperature and temperature uniformity.
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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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