[1]梁财,陈晓平,鹿鹏,等.高压浓相变粒径煤粉气力输送阻力特性[J].东南大学学报(自然科学版),2009,39(3):641-645.[doi:10.3969/j.issn.1001-0505.2009.03.041]
 Liang Cai,Chen Xiaoping,Lu Peng,et al.Resistance characteristics of dense-phase pneumatic conveying pulverized coal with various particle size under high pressure[J].Journal of Southeast University (Natural Science Edition),2009,39(3):641-645.[doi:10.3969/j.issn.1001-0505.2009.03.041]
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高压浓相变粒径煤粉气力输送阻力特性()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
39
期数:
2009年第3期
页码:
641-645
栏目:
化学化工
出版日期:
2009-05-20

文章信息/Info

Title:
Resistance characteristics of dense-phase pneumatic conveying pulverized coal with various particle size under high pressure
作者:
梁财 陈晓平 鹿鹏 蒲文灏 周云 许盼 赵长遂
东南大学能源与环境学院, 南京 210096
Author(s):
Liang Cai Chen Xiaoping Lu Peng Pu Wenhao Zhou Yun Xu Pan Zhao Changsui
School of Energy and Environment, Southeast University, Nanjing 210096, China
关键词:
高压 浓相 粒径 压损 局部阻力
Keywords:
high pressure dense-phase particle size pressure drop local pressure drop
分类号:
TQ536
DOI:
10.3969/j.issn.1001-0505.2009.03.041
摘要:
在自主设计的高压浓相气力输送系统上进行不同粒径的煤粉气力输送试验研究.在对试验系统进行准确性和稳定性分析的基础上,分别在不同的输送压力、煤粉粒径和输送速度等条件下进行输送试验,考察操作参数和煤粉物性对各管段的压损、局部阻力特性及输送气体品质的影响规律.结果表明:随着输送速度的增加,各管段压损先减小后略有增大; 在相同的质量流量和输送压力下,随着煤粉平均粒径的增大,压损逐渐增大.在输送速度和固气比保持不变的条件下,随着压力的升高,输送气体的输送能力增强,压损逐渐降低,ΔPv-ΔPh逐渐减小.随着表观速度的增加,弯管局部阻力先减小后变化平缓; 在相同表观速度下,煤粉粒度越大,局部阻力值越高; 弯管当量系数K与输送速度固气比无关,与煤粉粒径,输送压力相关; 随着粒径的增加,弯管当量系数K先增大后减小.
Abstract:
Dense-phase pneumatic conveying experiments of pulverized coal with various particle sizes were carried out at the experimental facility. Based on analyzing the stability and accuracy of experimental system, the influences of the conveying pressure, the coal particle sizes and the conveying velocity on pressure drops of different pipe sections, local pressure drop characteristics and quality of conveying gas were investigated. The results indicate that pressure drops of different pipe sections increase first and then decrease with the increase in conveying velocity. Under a constant mass flow rate and conveying pressure, the larger the mean coal particle sizes are, the greater the pressure drops are. Gas conveying capacity rises but pressure drops and ΔPvPh decreases with the increase in conveying pressure at the constant solid-gas ratio and conveying velocity. Local pressure drop of bend pipe reduces first and then remains nearly flat with the increase in superficial velocity. There are positive correlations between coal particle size and local pressure drop. The bend equivalent coefficient K which does not relate to the conveying velocity and the solid-gas ratio is affected by the coal particle size and the conveying pressure. The bend equivalent coefficient K increases first and then decreases with the increase in coal particle size.

参考文献/References:

[1] Vásquez N,Jacob K,Cocco R,et al.Visual analysis of particle bouncing and its effect on pressure drop in dilute phase pneumatic conveying[J].Powder Technology,2007,179(3):170-175.
[2] Rajniak P,Dhanasekharan K,Sinka C,et al.Modeling and measurement of granule attrition during pneumatic conveying in a laboratory scale system[J].Powder Technology,2008,185(3):202-210.
[3] Laín S,Sommerfeld M.Euler/Lagrange computations of pneumatic conveying in a horizontal channel with different wall roughness[J].Powder Technology,2008,184(1):76-88.
[4] Pahk J B,Klinzing G E.Comparison of flow characteristics for dilute phase pneumatic conveying for two different plastic pellets[J].Journal of the Chinese Institute of Chemical Engineers,2008,39(2):143-150.
[5] Klinzing G E,Marcus R D,Rizk F,et al. Pneumatic conveying of solid[M].London:Chapman & Hall,1992:117-119.
[6] Liang C,Zhao C S,Chen X P,et al.Flow characteristics and Shannon entropy analysis of dense-phase pneumatic conveying of variable moisture content under high pressure[J].Chemical Engineering and Technology,2007,30(7):926-931.
[7] Chen X P,Fan C L,Liang C,et al.Investigation on characteristics of pulverized coal dense-phase pneumatic conveying under high pressure[J].Korean Journal of Chemical Engineering,2007,24(3):499-502.
[8] Pu W H,Zhao C S,Xiong Y Q,et al.Three-dimensional numerical simulation of dense pneumatic conveying of pulverized coal in a vertical pipe at high pressure[J]. Chemical Engineering and Technology,2008,31(2):215-223.

相似文献/References:

[1]沈骝,梁财,陈晓平,等.气力输送中不同物料的流动特性及倾斜管阻力特性[J].东南大学学报(自然科学版),2014,44(5):975.[doi:10.3969/j.issn.1001-0505.2014.05.018]
 Shen Liu,Liang Cai,Chen Xiaoping,et al.Flow behaviors and resistance properties of inclined pipe for different materials in pneumatic conveying[J].Journal of Southeast University (Natural Science Edition),2014,44(3):975.[doi:10.3969/j.issn.1001-0505.2014.05.018]
[2]梁财,赵长遂,陈晓平,等.高压浓相粉煤气力输送[J].东南大学学报(自然科学版),2007,37(3):427.[doi:10.3969/j.issn.1001-0505.2007.03.015]
 Liang Cai,Zhao Changsui,Chen Xiaoping,et al.Dense-phase pneumatic conveying of pulverized coal under high pressure[J].Journal of Southeast University (Natural Science Edition),2007,37(3):427.[doi:10.3969/j.issn.1001-0505.2007.03.015]

备注/Memo

备注/Memo:
作者简介: 梁财(1980—),男,博士,讲师,liangc@seu.edu.cn.
基金项目: 国家重点基础研究发展计划(973计划)资助项目(2004CB217702-01).
引文格式: 梁财,陈晓平,鹿鹏,等.高压浓相变粒径煤粉气力输送阻力特性[J].东南大学学报:自然科学版,2009,39(3):641-645. [doi:10.3969/j.issn.1001-0505.2009.03.041]
更新日期/Last Update: 2009-05-20