Nghiên cứu nâng cao hiệu quả thu hồi bụi gỗ của cyclone với dòng tuần hoàn

Abstract

Wood dust impacts on human health and the surrounding environment, so it is necessary to study and improve the efficiency of wood dust treatment in wood processing factories, which contributing to cleaning up the working environment. . This study focuses on evaluating the properties of wood dust at the wood processing factory, designing and optimizing the operation of the improved cyclone model. The results obtained are as follows: Classification of 5 wood dust size groups (<5 μm; 5 -10 μm; 10-30 μm; 30-74 μm and >74 μm) corresponding to the mass ratio (2.2 %; 9.3%; 18.3%; 26.5% and 43.7%); basic design parameters of  the cyclone device(diameter 135mm, height 619mm, height of cone body 271mm;height of cylinder body 307mm); Design parameters of an auxiliary device (diameter 94mm; central pipe diameter 67mm; recirculation duct height 64mm and recirculation duct width 32mm); Dust collection efficiency of the unimproved cyclone reaches up to 84% while applying this improved cyclone model brings efficiency up to 92.3%; The operating parameters are determined appropriately as the feed flow rate of 19m/s, the recycle stream of 50% with the air flow rate of 130m³/h. The design model has shown more significant dust collection efficiency than the unimproved single cyclone.