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Chen Y.,Yunnan Leaf Tobacco Redrying Co. | Li J.,Yunnan Leaf Tobacco Redrying Co. | Tian H.,Yunnan Leaf Tobacco Redrying Co. | Chen M.,Yunnan Leaf Tobacco Redrying Co. | Chen Z.,Yunnan Leaf Tobacco Redrying Co.
Tobacco Science and Technology | Year: 2013

The vibration screen for stem classifying in tobacco processing facilities has the shortcomings of unsteady long stem quality, higher energy consumption and serious dust pollution in production site, therefore a closed pentagonal rotary screen was designed, which was composed of a shafted pentagonal rotary screen with spiker rods, and a closed screening bunker equipped with an automatic intermittent discharging airlock. The new screen had the capacity to replace several vibration screens now in use, moreover, it had the functions of dust exhausting and stem cooling. The results of application indicated that the rate of long stem increased by about 13 percentage points, the temperature of packed long stems dropped by 5-10°C, the total energy consumption of stem classifying was no more than 7.5 kW, and 360 Kw·h of electric power was saved per day. The classified long stems were clean and free of crushed strips. It was not necessary to clean the screen manually. The vibration noise and dust pollution reduced, while the strip yield increased.

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