料罐中粉体静电特性

doi:10.16085/j.issn.1000-6613.2017-0248

化工进展 ›› 2017, Vol. 36 ›› Issue (10): 3633-3638.DOI: 10.16085/j.issn.1000-6613.2017-0248

料罐中粉体静电特性

李俊菲, 梁财, 胡驾纬, 陈晓平, 赵长遂

东南大学能源与环境学院, 能源热转换及其过程测控教育部重点实验室, 江苏南京 210096

收稿日期:2017-02-21 修回日期:2017-03-13 出版日期:2017-10-05 发布日期:2017-10-05
通讯作者: 梁财,博士,副教授,从事高压超浓相气力输送、洁净煤燃烧及焦油的脱除等研究.
作者简介:李俊菲(1993-),女,硕士研究生,研究方向为流化床内颗粒静电特性.E-mail:seulijf@163.com.
基金资助:
国家自然科学基金项目（51676048）。

Electrostatic characteristics of powders in hopper

LI Junfei, LIANG Cai, HU Jiawei, CHEN Xiaoping, ZHAO Changsui

Key Laboratory of Energy Thermal Conversion and Control Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, Jiangsu, China

Received:2017-02-21 Revised:2017-03-13 Online:2017-10-05 Published:2017-10-05

摘要/Abstract

摘要： 在料罐静电测量试验装置中，对无烟煤和生物质进行静电特性研究。通过改变流化时间、流化风速等操作参数，以及粉体种类、粉体粒径、含水率等物性参数，用法拉第筒测得粉体荷质比，对料罐内粉体的静电量变化规律进行了研究，并对影响静电量变化的各因素进行了拟合分析。结果表明：在相同的试验条件下，随着流化时间的延长，物料的荷质比增大，当颗粒流化达到90min后，料罐内静电水平达到饱和状态；且生物质带正电，煤粉带负电；随着流化风速的增大，粉体间碰撞程度剧烈，粉体的荷质比增大；流化数相同的情况下，同种粉体颗粒粒径越小，荷质比越大。小粒径无烟煤的荷质比要明显大于大粒径无烟煤的荷质比；保持相同的流化条件，生物质外水含量越高，生物质的荷质比越小。

关键词: 气力输送, 静电特性, 粉体

Abstract: Experiments were conducted to investigate the electrostatic characteristics of anthracite and biomass powders in hopper. The effects of different operating parameters and material properties,in terms of the fluidizing time,fluidizing gas velocity,material type,particle size,the moisture content,on particle charging were examined with particle charge-to-mass measured by Faraday cup. And the fitting analysis on the various factors affecting the electrostatic was implemented. The results indicated that under the same experimental conditions,ratios of powders charge to mass increased as the fluidizing time went on. Charge saturation was attained for fluidization time greater than 90min. Biomass powders were always charged positively,whereas anthracite became negatively charged. As superficial velocity increased with stronger collision,the charge density of powders increased as well. The ratios of charge to mass of small size fine anthracite particles were larger than that of the big size fine anthracite particles with the same superficial velocity. The ratios of biomass powders charge to mass decreased significantly with the increase in the moisture content.

Key words: pneumatic conveying, electrostatic characteristics, powders

中图分类号:

TQ536

李俊菲, 梁财, 胡驾纬, 陈晓平, 赵长遂. 料罐中粉体静电特性[J]. 化工进展, 2017, 36(10): 3633-3638.

LI Junfei, LIANG Cai, HU Jiawei, CHEN Xiaoping, ZHAO Changsui. Electrostatic characteristics of powders in hopper[J]. Chemical Industry and Engineering Progress, 2017, 36(10): 3633-3638.

参考文献

[1] BAILEY A G.Electrostatic phenomena during powder handling[J].Powder Technology,1984,37:71-85.
[2] 刘尚合,宋学君.静电及其研究进展[J].自然杂志,2007,29(2):63-68.LIU Shanghe,SONG Xuejun.Progress in electrostatic and related research[J].Chinese Journal of Nature,2007,29(2):63-68.
[3] BOLAND D,GELDART D.Electrostatic charging in gas fluidized beds[J].Powder Technology,1972,5(5):289-297.
[4] BI H T.Electrostatic phenomena in gas-solids fluidized beds[J].China Particuology,2005,3(6):395-399.
[5] 赵长遂,梁财,陈晓平.气流床气化炉煤粉浓相气力输送综述[J].电力建设,2009,30(2):1-10.ZHAO Changsui,LIANG Cai,CHEN Xiaoping.An overview:dense-phase pneumatic conveying of pulverized coal for entrained bed gasifier[J].Electric Power Construction,2009,30(2):1-10.
[6] 高聚忠.煤气化技术的应用与发展[J].洁净煤技术,2013,19(1):65-71.GAO Juzhong.Application and development of coal gasification technologies[J].Clean Coal Technology,2013,19(1):65-71.
[7] MINCHENER A J.Coal gasification for advanced power generation[J].Fuel,2005,84(17):2222-2235.
[8] HENDRICKSON G.Electrostatics and gas phase fluidized bed polymerization reactor wall sheeting[J].Chemical Engineering Science,2006,61(4):1041-1064.
[9] MEHRANI P,BI H T,GRACE J R.Electrostatic charge generation in gas-solid fluidized beds[J].Journal of Electrostatics,2005,63(2):165-173.
[10] GUARDIOL A J,ROJO V,RAMOS G.Influence of particle size,fluidization velocity and relative humidity on fluidized bed electrostatics[J].Journal of Electrostatics,1996,37(1/2):1-20.
[11] ALSMARI T A,GRACE J R,BI X T.Effects of superficial gas velocity and temperature on entrainment and electrostatics in gas-solid fluidized beds[J].Chemical Engineering Science,2015,123:49-56.
[12] YAO L,BI H T,PARK A H.Characterization of electrostatic charges in freely bubbling fluidized beds with dielectric particles[J].Journal of Electrostatics,2002,56(2):183-197.
[13] 许盼,陈晓平,梁财,等.不同外水含量下煤粉高压密相输送试验研究[J].煤炭学报,2010,35(8):1359-1363.XU Pan,CHEN Xiaoping,LIANG Cai,et al.Study on dense-phase conveying experiments of pulverized coal with various external moisture contents at high pressure[J].Journal of China Coal,2010,35(8):1359-1363.
[14] 王芳,王靖岱,阳永荣.动态粉体静电测量技术的研究进展[J].化工自动化及仪表,2008,35(5):1-6.WANG Fang,WANG Jingdai,YANG Yongrong.Research progress of electrostatic measurement technique for dynamic powders[J].Control and Instruments in Chemical Industry,2008,35(5):1-6.
[15] BI H T.Electrostatic phenomena in gas-solids fluidized beds[J].China Particuology,2005,3(6):395-399.
[16] REVEL J,GATUMEL C,DODDS J A,et al.Generation of static electricity during fluidisation of polyethylene and its elimination by air ionisation[J].Powder Technology,2003,135/136:192-200.
[17] LIU Z,BI X T,GRACE J R.Electrostatic charging behaviour of dielectric particles in a pressurized gas-solid fluidized bed[J].Journal of Electrostatics,2010,68(4):321-327.
[18] MEHRANI P,BI H T,GRACE J R.Electrostatic behavior of different fines added to a Faraday cup fluidized bed[J].Journal of Electrostatics,2007,65(1):1-10.
[19] MURTOMAA M,RASANEN E,RANTANEN J,et al.Electrostatic measurements on a miniaturized fluidized bed[J].Journal of Electrostatics,2003,57(1):91-106.
[20] 吴金成.二次电子发射与固体材料静电起电的理论研究[D].广州:华南理工大学,2013.WU Jincheng.Theory research on secondary electron emission and static electrification of solid material[D].Guangzhou:South China University of Technology,2013.
[21] ZHANG L F,HOU J T,BI X T.Triboelectric charging behavior of wood particles during pellet handling processes[J].Journal of Loss Prevention in the Process Industries,2013,26(6):1328-1334.
[22] GIFFIN A,MEHRANI P.Effect of gas relative humidity on reactor wall fouling generated due to bed electrification in gas-solid fluidized beds[J].Powder Technology,2013,235:368-375.
[23] PARK A,BI H T,GRACE J R.Reduction of electrostatic charges in gas-solid fluidized beds[J].Chemical Engineering Science,2002,57(1):153-162.

料罐中粉体静电特性

Electrostatic characteristics of powders in hopper

PDF (PC)

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 15

编辑推荐

Metrics

本文评价

[1]	范旭阳, 陈延信, 赵博, 张蕾蕾. 气体硫黄还原磷石膏制酸新工艺预还原数值模拟[J]. 化工进展, 2023, 42(10): 5414-5426.
[2]	邓权龙, 丁厚成, 徐远迪, 蒋仲安, 杨岚, 孙雪霏. 表面活性雾滴联合金属网栅增效除尘[J]. 化工进展, 2023, 42(1): 546-552.
[3]	曹正凯, 米晓斌, 吴子明, 孙士可, 曹均丰, 彭德强, 梁相程. 煤合成气净化除尘装置压降问题分析及应用优化[J]. 化工进展, 2022, 41(S1): 15-21.
[4]	张喻, 高宁博, 全翠, 王凤超. 低阶煤热解高温油气除尘技术进展[J]. 化工进展, 2022, 41(4): 1814-1824.
[5]	许瑞阳, 白勇, 司慧, 刘德财, 祁项超. 生物质快速热解流化床反应器气力进料特性[J]. 化工进展, 2022, 41(4): 1742-1749.
[6]	苏洋, 罗振敏, 王涛. CO₂/海泡石抑爆剂对氢气/甲烷爆炸特性参数的影响[J]. 化工进展, 2022, 41(11): 5731-5736.
[7]	邹星宇, 赵文霞, 刘勇, 许瑞梅. 炭化叶脉网络生长MOFs材料制备透明超级电容器[J]. 化工进展, 2022, 41(1): 350-358.
[8]	靳元勋, 霍地, 孙旭东. 液相法制备棒状Al₂O₃及Al₂O₃-ZrO₂陶瓷复合粉体[J]. 化工进展, 2021, 40(S2): 309-314.
[9]	冯东, 王博, 戚方伟, 胡天丁. 选择性激光烧结用聚合物基材料制备研究进展[J]. 化工进展, 2021, 40(8): 4290-4304.
[10]	宣颖, 刘雪东, 周成奇, 刘文明, 刘红梅, 顾宇彤, 彭涛. 粉体混合过程及搅拌功率的DEM数值模拟和实验[J]. 化工进展, 2021, 40(7): 3598-3607.
[11]	谢明辉, 周国忠, 杨超. 粉体搅拌扭矩的试验及关联式[J]. 化工进展, 2021, 40(1): 82-88.
[12]	温芳, 张勃, 吕鹏鹏. 发光材料在防眩光交通监控补光照明中的应用[J]. 化工进展, 2020, 39(S1): 206-211.
[13]	张建伟,闫宇航,沙新力,冯颖,马繁荣. 撞击流强化混合特性及用于制备超细粉体研究进展[J]. 化工进展, 2020, 39(3): 824-833.
[14]	陈日志, 姜红, 范益群, 高从堦, 邢卫红. 膜分散技术及其强化反应过程的研究进展[J]. 化工进展, 2020, 39(12): 4812-4822.
[15]	曲艳东, 高凌霞, 章文姣, 刘伟. 爆炸合成纳米粉体及其团聚控制研究进展[J]. 化工进展, 2020, 39(12): 5136-5147.