烟草科技2016，Vol.49Issue(6)：87-92,6.DOI:10.16135/j.issn1002-0861.20160614
隧道式叶丝回潮机排气罩结构的优化设计
Optimization design of exhaust hood in tunnel type tobacco conditioner
摘要
Abstract
In order to minimize tobacco particles from being drawn into the exhaust hood in the tunnel type conditioner, the exhaust hood was redesigned. As the first step, the bottom of exhaust hood was changed from open type into close type, and the height of the hood was increased by 1 m. As the second step, two air baffle plates were installed inside the hood, and a slot was created on hood wall. A mathematical model for flow field and tobacco particle movement inside the hood was established based on fluid mechanics theory, and the relationship of tobacco movement trajectory with the shape, size and inside structure of the hood was studied via numerical simulation. The results showed that: 1) After the first step, the volume of air entering into the exhaust hood reduced by 23.5%, 68.4% of the tobacco particles entering into in the hood stayed there for longer than 10 s. The airborne tobacco particles tended to build up on the hood wall, it might drop off occasionally. 2) After the second step, the tobacco that stayed in the hood longer than 10 s only accounted for 22.8%, the amount of tobacco building up on the hood wall reduced obviously. The recovery rate of tobacco particles reached 80.67%, its concentration at the exit was 37.5 mg/m³, which satisfied the requirement for allowable emission concentration, and the utilization rate of strips and cigarette quality were promoted.关键词
隧道式叶丝回潮机/排气罩/叶丝颗粒/数值模拟/运动轨迹Key words
Tunnel type conditioner/Exhaust hood/Tobacco particle/Numerical simulation/Movement trajectory分类
轻工纺织引用本文复制引用
赵永祥,张广博,曹为学,尤学一..隧道式叶丝回潮机排气罩结构的优化设计[J].烟草科技,2016,49(6):87-92,6.基金项目
上海烟草集团有限责任公司科技项目“制丝车间烟尘控制研究”（K2013-2-013p）。 （）
