Study on the mechanical separation characteristics for municipal solid waste using trommel screener
城市生活垃圾滚筒筛分选特性研究

The trommel screener is often used to separate MSW (municipal solid waste). However, MSW separation utilizing trammel screener is seldom reported in China. In this study, a trommel screener with a separation capacity of 150 kg MSW per hour was designed and its optimal operational parameters were determined. The optimum separation efficiencies can be reached when the ratio of Vobservation/Vextremity ranged from 0.51 to 0.73 and roller angle 5.3°to 7.0°for 120 mm of mesh diameter, 0.33 to 0.60 and roller angle 4.3°to 7.8°for 80 mm of mesh diameter, and 0.51 to 0.60 and roller angle 3.2°to 6.0°for 40 mm of mesh diameter, respectively. The separation efficiencies of trommel screener were observed to be closely related to L (length of roller), D (screener inner-diameter) and L/D. The optimum separation efficient can be reached that for L/D ranged from 2.5 to 3.0, slightly over 3.3, and much higher than 3.3, the corresponding D were 120 mm, 80 mm and 40 mm respectively.