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城市生活垃圾滚筒筛分选特性


1. Faculty of Architectural Civil Engineering and Environment of Ningbo University,Ningbo 315211
2. The State Key Laboratory of Pollution Control and Resource Reuse,Tongji University,Shanghai 200092
第 31 卷第 10 期 2011 年 10 月
环境科学学报 Acta Scientiae Circumstantiae
Vol. 31,No. 10 Oct. ,2011
李兵,董志颖,赵由才,等. 2011. 城市生活垃圾滚筒筛分选特性研究[J]. 环境科学学报,31( 10) : 2268-2274 Li B,Dong Z Y,Zhao Y C,et al. 2011. Study on the mechanical separation characteristics for municipal solid waste using trommel screenerS[J]. Acta Scientiae Circumstantiae,31( 10) : 2268-2274
城市生活垃圾滚筒筛分选特性研究
李兵1,* ,董志颖1 ,赵由才2 ,郑琦宏1 ,朱建林1
1. 宁波大学建筑工程与环境学院,宁波 315211
2. 同济大学污染控制与资源化研究国家重点实验室,上海 200092
收稿日期:2010-12-26
修回日期:2011-01-27
录用日期:2011-01-31
摘要:滚筒筛筛分是生活垃圾分选中常用的工艺,国内目前有关滚筒筛分选生活垃圾的研究尚不多见. 因此,本实验通过自行设计的一台处理 能力为 150 kg·h - 1 的滚筒筛,采用实际生活垃圾进行分选实验,确定最佳运行参数范围. 结果表明,当滚筒筛孔径为 120 mm 时,在 V实测 / V极限 ( V实测 为滚筒转动时实时测定转速,V极限 为物料与滚筒一起转动时的临界转速) 为 0. 51 ~ 0. 73、角度为 5. 3° ~ 7. 0° 条件下分选效率最佳; 当滚 筒筛孔径为 80 mm 时,在 V实测 / V极限 为 0. 33 ~ 0. 60、角度为 4. 3° ~ 7. 8°条件下分选效率最佳; 当滚筒筛孔径为 40 mm 时,在 V实测 / V极限 为 0. 51 ~ 0. 60、角度为 3. 2° ~ 6. 0°条件下分选效率最佳. 在滚筒筛的筛筒内径 D 不变的条件下,为获得较高的分选效率,对于不同的筛孔孔径,其筛 体的长度 L 应不同,筛孔孔径越小,L 值应越大,即 L / D 应越大. 当滚筒筛孔径为 120 mm 时,L / D 应为 2. 5 ~ 3. 0; 当滚筒筛孔径为 80 mm 时, L / D应大于 3. 3; 当滚筒筛孔径为 40 mm 时,L / D 值应远大于 3. 3. 但实际设计时,L / D 值不应增大太多. 关键词:城市生活垃圾; 滚筒筛; 分选; 分选效率
文章编号:0253-2468( 2011) 10-2268-07
中图分类号:X705
文献标识码:A
Study on the mechanical separation characteristics for municipal solid waste using trommel screener
LI Bing1,* ,DONG Zhiying1 ,ZHAO Youcai2 ,ZHENG Qihoncember 2010;
received in revised form 27 January 2011;
accepted 31 January 2011
Abstract: 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. Keywords: municipal solid waste; trammel screener; separation; separation efficiency
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