煤粉爆炸特性与煤粉仓防爆措施研究

详细信息    查看官网全文

• 英文论文题名：Study on explosion characteristics of pulverized coal and explosion proof measures of coal bunker
• 论文作者：肖翠微
• 英文论文作者：Xiao Cuiwei ; China Coal Research Institute Company Limited ; State Key Laboratory of Coal Mining and Clean Utilization ; National Energy Technology and Equipment Laboratory of Coal Utilization and Emission Control
• 年：2016
• 作者机构：煤炭科学技术研究院有限公司;煤炭资源高效开采与洁净利用国家重点实验室;国家能源煤炭高效利用与节能减排技术装备重点实验室;
• 论文关键词：煤粉爆炸 ; 煤粉仓 ; 工业锅炉 ; 防爆措施
• 英文论文关键词：pulverized coal explosion ; pulverized coal bunker ; industrial boiler ; explosion proof measures
• 会议召开时间：2016-11-29
• 会议录名称：第三届煤炭科技创新高峰论坛——煤炭绿色开发与清洁利用技术与装备论文集
• 语种：中文
• 分类号：TD54;TD77
• 学会代码：ZGMT
• 会议名称：第三届煤炭科技创新高峰论坛——煤炭绿色开发与清洁利用技术与装备
• 会议地点：中国北京
• 主办单位：中国煤炭工业协会、中国煤炭科工集团有限公司、中国煤炭学会、煤炭科学研究总院
• 学会名称：中国煤炭学会
• 页数：6
• 文件大小：459k
• 原文格式：O
• 会议级别：全国

摘要

为明确煤粉工业锅炉用煤的爆炸特性,给煤粉仓安全防爆设计提供依据,在20 L球型爆炸测试装置上研究了3种煤粉(褐煤、烟煤)工业锅炉典型用煤的爆炸特性,得到了3种煤粉的爆炸特性参数最大爆炸压力P_(max)最大爆炸压力上升速率γ_(max)和最大爆炸指数K_(max),同时对煤粉粉尘爆炸的压力随挥发分的变化规律、煤粉爆炸猛烈程度及其影响因素进行了分析;最后对影响煤粉仓安全的防爆因素与处理措施进行了研究。结果表明:3种煤粉的P_(max)依次为0.764 3、0.756 9、0.752 8 MPa,挥发分对煤粉的爆炸特性有较大的影响,挥发分高的煤粉,其P_(max)相应较大;3种煤粉的K_(max)依次为19.584 5、19.539 1、19.221 0 MPa·m/s,挥发分越高,最大爆炸指数越大,煤粉爆炸猛烈程度越大;K_(max)对应的煤粉浓度与煤中可燃基含量有关,可燃基越高,K_(max)对应的煤粉浓度越低。煤粉工业锅炉系统煤粉仓安全防爆设计可采用浓相操作、封闭、惰性气体保护、防静电接地、泄爆等措施,以保障煤粉仓的安全运行。
In order to clarify the explosion characteristics of the coal in pulverized coal-fired industrial boilers,and provide the basis for safety and explosion proof design of coal bunker,the explosion characteristics of three kinds of typical coal(a lignite sample,and two samples of bituminous coal) in pulverized coal-fired industrial boiler were studied in the 20 L sphere explosion test apparatus,and the explosion characteristic parameters of three kinds of coal powder were obtained:the maximum explosion pressure(P_(max)),the maximum explosion pressure rising rate(γ_(max)),and the maximum explosion index(K_(max)).The pressure on pulverized coal dust explosion with volatile variation,the ferocity of coal dust explosion and the influencing factors were discussed.At the same time,the safety and explosion proof factors and measures of coal bunker were researched.The results show that the P_(max) of the three kinds of coal powder are successively 0.764 3,0.756 9,0.752 8 MPa.The content of volatile has a great influence on the explosion characteristics of coal,and the higher of the volatile,the larger of the P_(max) is relatively.The K_(max) of the three kinds of coal powder are successively 19.584 5,19.539 1,19.221 0 MPa·m/s.The higher of the volatile,the larger of the K_(max) is,and the greater ferocity of coal dust explosion is.The coal dust concentration corresponding to K_(max) is related to the combustible basis of the coal.The higher of the combustible basis,the lower of the coal dust concentration is relatively.The safety and explosion proof design of pulverized coal bunker of pulverized coal-fired industrial boiler can be carried out by the method of dense phase operation,closed,inert gas protection,static electricity protection ground and discharging explosion.

引文

[1]刘飞.煤粉仓自燃的原因分析及处理[J].水泥,2010,47(2):44-45.Liu Fei.Analysis of the cause and treatment of spontaneous combustion in coal storehouse[J].Cement,2010,47(2):44-45.
    [2]程新联.一次煤粉仓自燃的扑救措施和着火原因分析[J].四川水泥,2014(8):17.Cheng Xinlian.Analysis of the resure measures and the cause of ignition of a pulverized coal bunker[J].Sichuan Cement,2014(8):17.
    [3]Kenneth L Cashdollar.Coal dust explosibility[J].Journal of Loss Prevention in the Process Industries,1996,9(1):65-76.
    [4]浦以康,胡俊,贾复.高炉喷吹用烟煤煤粉爆炸特性的实验研究[J].爆炸与冲击,2000,20(4):303-312.Pu Yikang,Hu Jun,Jia Fu.Experimental studies of explosion characteristics of bituminous coal dust-air mixtures injected in blast furnace[J].Explosion and Shock Waves,2000,20(4):303-312.
    [5]金龙哲,金岩辉,张俊燕,等.高炉喷吹用潞安贫瘦煤爆炸下限与返回火焰长度的试验研究[J].中国安全科学学报,2005,15(11):61-64.Jin Longzhe,Jin Yanhui,Zhang Junyan,et al.Experimental study on lower explosion limit and length of return fire when blasting Luan Barren Coal into blast furnace[J].China Safety Science Journal,2005,15(11):61-64
    [6]高聪,李化,苏丹,等.密闭空间煤粉的爆炸特性[J].爆炸与冲击,2010,30(2):164-168.Gao Cong,Li Hua,Su Dan,et al.Explosion characteristics of coal dust in a sealed vessel[J].Explosion and Shock Waves,2010,30(2):164-168.
    [7]李化,高聪,苏丹,等.烟煤粉爆炸特性实验研究[J].四川大学学报:工程科学版,2009,41(6):79-83.Li Hua,Gao Cong,Su Dan,et al.Experimental research on bituminous coal dust explosibility[J].Journal of Sichuan University:Engineering Science Edition,2009,41(6):79-83.
    [8]李加护.超细煤粉爆炸特性的实验研究与分析[D].保定:华北电力大学,2003.
    [9]Proust C.A few fundamental aspects about ignition and flame propagation in dust clouds[J].Journal of Loss Prevention in the process Industries,2006,19(2/3):104-120
    [10]Proust C,Accorsi A,Duponl L.Measuring the violence of dust explosion with the"20 liter sphere"and with the standard"ISO 1 m~3 vessel":systematic comparison and analysis of the discrepancies[J].Journal of Loss Prevention in the Process Industries,2007,20(4):599-606.
    [11]邓熙帆,谢林,钟圣俊,等.烟煤粉爆炸性及防爆方法研究[J].粉体技术,1997,3(1):3-8.Deng Xufan,Xie Lin,Zhong Shengjun,et al.Study on explosibility and explosion protection measures for bituminous dusts[J].Powder Science and Technology,1997,3(1):3-8.
    [12]Bartknecht W.Ecplosions[M].Burg Almond,Translated.New York:Springer Verlag,1981.
    [13]曹卫国,黄丽媛,梁济元,等.球形密闭容器中煤粉爆炸特性参数研究[J].中国矿业大学学报,2014,43(1):113-119.Cao Weiguo,Huang Liyuan,Liang Jiyuan,et al.Research on characteristic parameters of coal dust explosion in a spherical sealed container[J].Journal of China University of Mining&Technology,2014,43(1):113-119.
    [14]徐尧,王乃继,肖翠微.小型常压煤粉仓惰性气体保护系统设计及应用[J].煤炭科学技术,2012,40(8):115-117.Xu Yao,Wang Naiji,Xiao Cuiwei.Design and application of inert gas protection system to small-scale atmospheric pressure pulverized coal bunker[J].Coal Science and Technology,2012,40(8):115-117.
    [15]朱从军.煤化工领域高挥发性煤粉储仓的安全与防护[J].化学工程与装备,2010,39(12):161-162.Zhu Congjun.Safety and protection of high volatile pulverized coal storage in the field of coal chemical industry[J].Chemical Engineering&Equipment,2010,39(12):161-162.
    [16]王志杰,王艳红.浅谈新型干法水泥生产煤粉制备系统的安全设计[J].河南建材,2007,9(3):35-37.Wang Zhijie,Wang Yanhong.Discuss the safety design of the new dry process cement production system of coal powder preparation[J].Henan Building Materials,2007,9(3):35-37.
    [17]张嬿妮.煤氧化自燃微观特征及其宏观表征研究[D].西安:西安科技大学,2012.
    [18]许涛.煤自燃过程分段特性及机理的实验研究[D].徐州:中国矿业大学,2012.
    [19]陈欢,杨永亮.煤自燃预测技术研究现状[J].煤矿安全,2013,44(9):194-197.Chen Huan,Yang Yongliang.Research status of predicting coal spontaneous combustion[J].Safety in Coal Mines,2013,44(9):194-197.
    [20]黄鑫,秘义行,陈彦菲,等.煤制油工程中煤粉制备系统的火灾危险性分析[J].消防科学与技术,2011,29(3):179-183.Huang Xin,Bi Yixing,Chen Yanfei,et al.Fire danger analysis of coal powder manufacture system in coal liquefaction project[J].Fire Science and Technology,2011,29(3):179-183.
    [21]高凤强.煤粉仓防爆措施的研究[J].煤炭科学技术,2013,41(S1):239-241.Gao Fengqiang.Research on explosion-proof measures of pulverized coal bunker[J].Coal Science and Technology,2013,41(S1):239-241.
    [22]杨鸿如.浅谈煤粉中间储仓的安全措施[J].石河子科技,2010,9(4):62-64.Ynag Hongru.Discussion on the safety measures of coal powder storage bin[J].Shihezi Science and Technology,2010,9(4):62-64.