摘要
针对聚丙烯基个人防护装备需求量剧增而导致的聚丙烯基废塑料增多,在炼焦煤中配入废塑料是实现产城融合及固体有机废弃物绿色资源化利用的有效途径之一。在炼焦配合煤中配入聚丙烯塑料,分别用坩埚和2 kg焦炉进行共炭化试验以研究聚丙烯塑料对炼焦煤热解及成焦性能的影响。结果表明,聚丙烯塑料的热解失重温度区间完全重叠于配合煤的热解失重温度区间之内。配入聚丙烯塑料后,配合煤的固软温度区间由70.4℃最大变宽至106.3℃,黏结指数由78减小至71,最大膨胀度由21.9%减小至-4.7%,能提高共炭化过程中胶质体状态的连续性,促进成焦。聚丙烯塑料配入量为4%时,坩埚焦的结构强度和显微强度均有所提高,且坩埚焦的各向异性程度得以提高,坩埚焦的粒焦反应性降低,而粒焦反应后强度提高。采用成型煤工艺并添加4%的聚丙烯塑料进行炼焦,相较于单独用散煤炼焦所得的焦炭,其结构强度由84.71%提高到89.02%,显微强度由45.22%提高到47.12%,粒焦反应性由43.03%降至41.94%,粒焦反应后强度由58.31%增至64.60%,即聚丙烯废塑料与配合煤共炭化的焦炭质量有所提高。
With the increasing demand for polypropylene-based personal protective equipment,polypropylene-based waste plastics have increased.Adding waste plastics to coking coal is one of the effective ways to realize the integration of production and city and the green resource utilization of solid organic waste.Cokes were obtained by co-carbonization of the blended coal mixing with polypropylene plastics,that carried out with a crucible and a 2 kg coke oven respectively.The effects of adding polypropylene plastics into coking coal on the pyrolysis and coking properties of coking coal were studied.The results show that the thermoweight loss temperature range of polypropylene plastics is completely overlaps within that of blended coal.After blending polypropylene waste plastics,the solid-soft temperature range of blended coal widens from 70.4℃to 106.3℃,the caking index decreases from 78 to 71,and the maximum expansion degree decreases from 21.9%to-4.7%.It can improve the continuity of the plastic mass in the co-carbonization process and promote coke formation.When the proportion of polypropylene waste plastics was 4%,the structural strength(SSI)and the micro-strength(MSI)of the crucible coke were improved,and the optical anisotropy index(OTI)of the crucible coke was increased,and at the same time the particulate coke reactivity(PRI)was reduced,and the particulate coke post-reaction strength(PRS)was improved.Plastic was added by briquette coal process,when 4%polypropylene plastic was added into briquette coal for coking experiment,the SSI was increased from 84.71%to 89.02%,the MSI was increased from 45.22%to 47.12%,the PRI was reduced from 43.03%to 41.94%and the PSR was increased from 58.31%to 64.60%.That is,the performance of coke co-carbonized with polypropylene waste plastics and blended coal has been improved.
作者
黄峰
王明登
刘洋
师德谦
郑亚杰
李超
钟祥云
田娟娟
徐国忠
白金锋
HUANG Feng;WANG Mingdeng;LIU Yang;SHI Deqian;ZHENG Yajie;LI Chao;ZHONG Xiangyun;TIAN Juanjuan;XU Guozhong;BAI Jinfeng(College of Chemical Engineering,University of Science and Technology Liaoning,Anshan 114051,China;ACRE Coking&Refractory Engineering Consulting Corporation Ltd.,Dalian 116085,China)
出处
《煤质技术》
2022年第6期18-25,共8页
Coal Quality Technology
基金
中冶集团“181计划”首批资助项目“焦炉协同处置冶金企业及城市固废中难降解高分子聚合物关键技术与装备的研究”
兴辽英才计划科技创新领军人才项目(XLYC2002063)
辽宁省煤化工专业技术创新中心资助项目(USTL201905)。
关键词
聚丙烯废塑料
炼焦煤
共炭化
微观结构
热态性能
光学各向异性指数
结构强度
热解失重温度
polypropylene waste plastic
coking coal
co-carbonization
micro-structure
thermal properties
optical anisotropy index(OTI)
structural strength
pyrolysis weight loss temperature
