煤矸石与聚丙烯的混燃特性研究
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摘要
为改善煤矸石不易燃、同时解决聚丙烯作为生活垃圾难降解的问题,将两者进行混合燃烧并对两者的混燃特性进行了研究;并将不同比例的煤矸石样品与聚丙烯样品进行混合,利用热重分析仪对混合样品的燃烧特性、利用管式炉对混合样品的烟气特性进行实验分析。结果表明:煤矸石的失重率远小于聚丙烯;混合燃烧存在两个阶段,第一个阶段是聚丙烯燃烧,第二个阶段是煤矸石与聚丙烯混合燃烧;着火温度随着聚丙烯比例的增加而降低;煤矸石燃烧所需要的活化能约为聚丙烯的两倍;煤矸石和聚丙烯混合燃料比单一材料燃料更容易燃烧;混烧时随着温度的升高,SO2排放量先增大后减小,即低温时聚丙烯可以促进煤矸石中硫转化为SO2析出,高温时可以抑制SO2析出。
According to the non-flammability of coal gangue and non-degradation of polypropylene,the method of combustion after mixed as a fuel is proposed.Moreover,the samples of coal gangue and polypropylene are mixed with particle size and various proportion,and the combustion characteristic of the samples are analyzed under thermogravimetric analysis(TGA);the exhaust gas content of the ones are measured with pipe furnace.The results show that the weight loss rate of coal gangue is much smaller than that of polypropylene.There are two stages of mixed combustion,the first stage is polypropylene combustion,the second stage is the co-combustion of coal gangue and polypropylene.The ignition temperature decreases with the increase of polypropylene ratio;the activation energy required for the combustion of coal gangue is about two times of that of polypropylene;the coal and polypropylene blends are much easier to burn than fuel from a single material;with the increase of temperature,the SO2 emission increases first and then decreases.
According to the non-flammability of coal gangue and non-degradation of polypropylene,the method of combustion after mixed as a fuel is proposed.Moreover,the samples of coal gangue and polypropylene are mixed with particle size and various proportion,and the combustion characteristic of the samples are analyzed under thermogravimetric analysis(TGA);the exhaust gas content of the ones are measured with pipe furnace.The results show that the weight loss rate of coal gangue is much smaller than that of polypropylene.There are two stages of mixed combustion,the first stage is polypropylene combustion,the second stage is the co-combustion of coal gangue and polypropylene.The ignition temperature decreases with the increase of polypropylene ratio;the activation energy required for the combustion of coal gangue is about two times of that of polypropylene;the coal and polypropylene blends are much easier to burn than fuel from a single material;with the increase of temperature,the SO2 emission increases first and then decreases.
引文
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[2]李静,温鹏飞,何振嘉.煤矸石的危害性及综合利用的研究进展[J].煤矿机械,2017(11):128-130.DOI:10.13436/j.mkjx.201711049.
[3]范钊.煤矸石资源再生利用途径探讨[J].煤炭技术,2016,28(11):331-332.DOI:10.13301/j.cnki.ct.2016.11.132.
[4]赵莹莹,高金路,刘锦英.煤矸石发电技术浅析[J].设备管理与维修,2017(8):113-114.DOI:10.16621/j.cnki.issn1001-0599.2017.04.57.
[5]梁绍青.循环流化床锅炉掺烧煤矸石技术的探讨[J].煤炭工程,2010(7):84-86.DOI:10.3969/j.issn.1671-0959.2010.07.034.
[6]李晓云,赵瑞东,秦建光,等.城市生活垃圾与煤矸石混烧特性及其HCl排放特性研究[J].燃料化学学报,2016,44(11):1304-1309.DOI:10.3969/j.issn.0253-2409.2016.11.004.
[7]蒲舸,张力,王炯,等.生物质与煤矸石混烧特性实验研究[J].工程热物理学报,2009(2):333-335.DOI:10.3321/j.issn:0253-231X.2009.02.044.
[8]王裕明.工业污泥与煤矸石LCFB混烧特性数值模拟及试验研究[D].重庆:重庆大学,2010.
[9]Shehata A B.A New Cobalt Chelate as Flame Retardant for Polypropylene Filled with Magnesium Hydroxide[J].Polym De-grad Stab,2004(85):577-582.DOI:10.1016/j.polymdegradstab.2004.01.019.
[10]Tai C M,Li R K Y.Studies on the Impact Fracture Behaviour of Flame Retardant Polymeric Material[J].Mater Design,2001(22):15-19.
[11]徐元元,公维光,沈银龙.NiOx与活性炭协效催化聚丙烯成炭及燃烧性能[J].高分子材料科学与工程,2016(1):52-56.
[12]欧阳春发,高群,施宇涛,等.APP/MQ树脂对聚丙烯热分解动力学研究[J].上海应用技术学院学报(自然科学版),2010,12(4):255-258.DOI:10.3969/j.issn.1671-7333.2010.04.003.
[13]陈晓浪,于杰,郭少云,等.表面改性对聚丙烯/氢氧化镁纳米复合材料性能的影响[J].高分子材料科学与工程,2006,22(5):170-174.DOI:10.3321/j.issn:1000-7555.2006.05.043.
[14]陈晓浪,于杰,何敏,等.表面改性剂对聚丙烯/氢氧化镁复合材料燃烧性能和热稳定性及结晶行为的影响[J].高分子材料科学与工程,2009,25(5):60-63.DOI:10.3321/j.issn:1000-7555.2009.05.018.
[15]刘希平,宗若雯,任小男.典型热塑性材料竖直逆向火蔓延研究[J].消防科学与技术,2016,35(6):740-743.DOI:10.3969/j.issn.1009-0029.2016.06.003.
[16]徐冰,张宏涛,鹿小燕.基于FDS的聚丙烯热属性参数验证方法[J].消防科学与技术,2015,34(2):154-157.DOI:10.3969/j.issn.1009-0029.2015.02.004.
[17]刘义祥,王米兰.聚丙烯板材燃烧痕迹特征研究[J].消防科学与技术,2014,33(7):53-57.DOI:10.3969/j.issn.1009-0029.2014.07.004.
[18]何红亮.白音华褐煤半焦与生物质成型及其燃烧特性研究[D].大连:大连理工大学,2013.
[19]De Jong W,Pirone A,Wojtowicz M A.Pyrolysis of Miscanthus Giganteus and Wood Pellets:TG-FTIR Analysis and Reaction Kinetics[J].Fuel,2003,82:1139-1147.