成灰温度对污泥灰矿物质演变及热力学特性的影响研究
|
摘要
采用STA、SEM、XRD等谱学表征技术对不同成灰温度下的污泥灰样进行理化特性分析。研究表明,低温灰样仍含有呈黑棕色的残余未燃尽物,矿物质成分以方解石、石英以及焦磷酸盐为主,随着成灰温度升高,灰样中的未燃尽物燃烧分解而逐渐变为铁红色,并形成较多晶枝结构,直至熔融,同时矿物质成分变化显著,主要以中长石类、硬石膏、赤铁矿以及磷酸正盐为主。同步热分析实验表明,随着受热温度升高,不同成灰温度下的灰样均出现了吸附水、结晶水析出,污泥灰残余有机物燃烧分解,白云石、方解石和白云母分解,以及随后的硬石膏分解等失重阶段,而且成灰温度越低,终止失重质量越大。由于低温灰样保留了较多的污泥原有特征,因此吸热量大于高温灰样。
Physical and chemical properties of sludge ash samples at different ashing temperatures are studied by spectroscopy characterization technologies such as STA,SEM and XRD.The results show that ash samples at low temperature are black-brown due to remaining unburned materials,and the main mineral compositions are calcite,quartz and pyrophosphate.As the ashing temperatures increases,the unburned materials are combusted and decomposed,and then turned to iron-red with more dendritic structures.The mineralogical compositions change significantly with feldspar,anhydrite,hematite and orthophosphate as the main components.STA experiments imply that as heating temperature increases,ash samples at different ashing temperatures undergo the loss of absorption water and crystal water,combustion of residual organic materials,decomposition of dolomite,calcium and muscovite,and further decomposition of anhydrite.The lower ashing temperatures of the ash samples are,the more weights lose.The ash samples with lower ash temperature remains more original properties of sewage sludge,thus the heat absorption is greater than that of high temperature samples.
Physical and chemical properties of sludge ash samples at different ashing temperatures are studied by spectroscopy characterization technologies such as STA,SEM and XRD.The results show that ash samples at low temperature are black-brown due to remaining unburned materials,and the main mineral compositions are calcite,quartz and pyrophosphate.As the ashing temperatures increases,the unburned materials are combusted and decomposed,and then turned to iron-red with more dendritic structures.The mineralogical compositions change significantly with feldspar,anhydrite,hematite and orthophosphate as the main components.STA experiments imply that as heating temperature increases,ash samples at different ashing temperatures undergo the loss of absorption water and crystal water,combustion of residual organic materials,decomposition of dolomite,calcium and muscovite,and further decomposition of anhydrite.The lower ashing temperatures of the ash samples are,the more weights lose.The ash samples with lower ash temperature remains more original properties of sewage sludge,thus the heat absorption is greater than that of high temperature samples.
引文
[1]张国胜.城市污泥与混矸煤混燃特性的实验研究[J].热科学与技术,2017,16(4):307-312.ZHANG Guo-sheng.Study of co-combustion characteristic of sewage sludge and coal gangue mixed with weathered coal[J].Journal of Thermal Science and Technology,2017,16(4):307-312.(in Chinese)
[2]高颖佳,刘亮.污泥灰熔融特性分析[J].长沙理工大学学报(自然科学版),2011,8(1):80-84.GAO Ying-jia,LIU Liang.Fusion characteristic analysis on sewage sludge ash[J].Journal of Changsha University of Science&Technology(Natural Science),2011,8(1):80-84.(in Chinese)
[3]MU L,CAI J,CHEN J,et al.Further study on ash deposits in a large-scale wastewater incineration plant:ash fusion characteristics and kinetics[J].Energy&Fuels,2015,29(3):1812-1822.
[4]MAGDZIARZ A,WILK M,GAJEK M,et al.Properties of ash generated during sewage sludge combustion:A multifaceted analysis[J].Energy,2016,113:85-94.
[5]景妮洁,王勤辉,骆仲泱,等.气化条件下压力影响灰熔融特性的实验研究[J].热科学与技术,2010,9(1):75-78.JING Ni-jie,WANG Qin-hui,LUO Zhong-yang,et al.Experiments on effect of pressure on fusibility of caol ash under gasification atmosphere[J].Journal of Thermal Science and Technology,2010,9(1):75-78.(in Chinese)
[6]金湓,李宝霞.生物质与污水污泥共热解特性研究[J].可再生能源,2014,32(2):234-239.JIN Pen,LI Bao-xia.The study of co-pyrolysis characteristics of the biomass and sewage sludge[J].Renewable Energy Resources,2014,32(2):234-239.(in Chinese)
[7]OTERO M,DIEZ C,CALVO L F,et al.Analysis of the co-combustion of sewage sludge and coal by TG-MS[J].Biomass and Bioenergy,2002,22(4):319-329.
[8]张强,钱亚平,徐梦涵,等.污泥与煤共气化过程中含磷化合物对硫元素释放规律的影响[J].华东理工大学学报(自然科学版),2012,38(5):553-559.ZHANG Qiang,QIAN Ya-ping,XU Meng-han,et al.Influence of phosphorus compounds on sulfur releasing during coal and sewage sludge Co-gasification[J].Journal of East China University of Science and Technology(Natural Science Edition),2012,38(5):553-559.(in Chinese)
[9]DEGEREJI M U,INGHAM D B,MA L,et al.Numerical assessment of coals/blends slagging potential in pulverized coal boilers[J].Fuel,2012,102:345-353.
[10]尹洪超,蔡景成,陈建标,等.城市污泥灰分矿物质组分演变与热重实验分析[J].热科学与技术,2016,15(4):312-319.YIN Hong-chao,CAI Jing-cheng,CHEN Jianbiao,et al.Mineral components evolution and thermogravimetric analysis of municipal sludge ash[J].Journal of Thermal Science and Technology,2016,15(4):312-319.(in Chinese)
[11]殷立宝,邓昌亚,张成,等.工业、生活污泥与煤混合燃烧的灰熔特性研究[J].燃料化学学报,2014,42(9):1068-1076.YIN Li-bao,DENG Chang-ya,ZHANG Cheng,et al.Fusion characteristics in co-combustion of coal with industrial and municipal sludge[J].Journal of Fuel Chemistry and Technology,2014,42(9):1068-1076.(in Chinese)
[12]VASSILEV S.V,BAXTER D,VASSILEVA C.G.An overview of the behaviour of biomass during combustion:Part I.Phase-mineral transformations of organic and inorganic matter[J].Fuel,2013,112(3):391-449.
[13]VASSILEVA C.G,VASSILEV S.V.Behaviour of inorganic matter during heating of Bulgarian coals:1.Lignites[J].Fuel Processing Technology,2005,86(12):1297-1333.
[14]周丽娜.磷石膏、钾长石和碳酸钙体系反应历程研究[J].磷肥与复肥,2010,25(5):15-17.ZHOU Li-na.Study on reaction of phosphogypsum,potash feldspar and calcium carbonate system[J].Phosphate and Compound Fertilizer,2010,25(5):15-17.(in Chinese)
[15]贺中央,刘百宽,傅秋华,等.微晶白云石的热分解行为[J].耐火材料,2013,47(1):19-23.HE Zhong-yang,LIU Bai-kuan,FU Qiu-hua,et al.Thermal decomposition behavior of microcrystalline dolomite[J].Naihuo Cailao,2013,47(1):19-23.(in Chinese)
[16]尹龙晓,周兴求,伍健东,等.污泥与秸秆掺烧的燃烧特性研究及应用[J].可再生能源,2013,31(1):71-75.YIN Long-xiao,ZHOU Xing-qiu,WU Jian-dong,et al.The combustion characteristics and application of sludge mixed with straw[J].Renewable Energy Resources,2013,31(1):71-75.(in Chinese)
[18]DOTE Y,OGI T,YOKOYAMA S,et al.Analysis of oil derived from liquefaction of sewage sludge[J].Fuel,1992,71(9):1071-1073.
[2]高颖佳,刘亮.污泥灰熔融特性分析[J].长沙理工大学学报(自然科学版),2011,8(1):80-84.GAO Ying-jia,LIU Liang.Fusion characteristic analysis on sewage sludge ash[J].Journal of Changsha University of Science&Technology(Natural Science),2011,8(1):80-84.(in Chinese)
[3]MU L,CAI J,CHEN J,et al.Further study on ash deposits in a large-scale wastewater incineration plant:ash fusion characteristics and kinetics[J].Energy&Fuels,2015,29(3):1812-1822.
[4]MAGDZIARZ A,WILK M,GAJEK M,et al.Properties of ash generated during sewage sludge combustion:A multifaceted analysis[J].Energy,2016,113:85-94.
[5]景妮洁,王勤辉,骆仲泱,等.气化条件下压力影响灰熔融特性的实验研究[J].热科学与技术,2010,9(1):75-78.JING Ni-jie,WANG Qin-hui,LUO Zhong-yang,et al.Experiments on effect of pressure on fusibility of caol ash under gasification atmosphere[J].Journal of Thermal Science and Technology,2010,9(1):75-78.(in Chinese)
[6]金湓,李宝霞.生物质与污水污泥共热解特性研究[J].可再生能源,2014,32(2):234-239.JIN Pen,LI Bao-xia.The study of co-pyrolysis characteristics of the biomass and sewage sludge[J].Renewable Energy Resources,2014,32(2):234-239.(in Chinese)
[7]OTERO M,DIEZ C,CALVO L F,et al.Analysis of the co-combustion of sewage sludge and coal by TG-MS[J].Biomass and Bioenergy,2002,22(4):319-329.
[8]张强,钱亚平,徐梦涵,等.污泥与煤共气化过程中含磷化合物对硫元素释放规律的影响[J].华东理工大学学报(自然科学版),2012,38(5):553-559.ZHANG Qiang,QIAN Ya-ping,XU Meng-han,et al.Influence of phosphorus compounds on sulfur releasing during coal and sewage sludge Co-gasification[J].Journal of East China University of Science and Technology(Natural Science Edition),2012,38(5):553-559.(in Chinese)
[9]DEGEREJI M U,INGHAM D B,MA L,et al.Numerical assessment of coals/blends slagging potential in pulverized coal boilers[J].Fuel,2012,102:345-353.
[10]尹洪超,蔡景成,陈建标,等.城市污泥灰分矿物质组分演变与热重实验分析[J].热科学与技术,2016,15(4):312-319.YIN Hong-chao,CAI Jing-cheng,CHEN Jianbiao,et al.Mineral components evolution and thermogravimetric analysis of municipal sludge ash[J].Journal of Thermal Science and Technology,2016,15(4):312-319.(in Chinese)
[11]殷立宝,邓昌亚,张成,等.工业、生活污泥与煤混合燃烧的灰熔特性研究[J].燃料化学学报,2014,42(9):1068-1076.YIN Li-bao,DENG Chang-ya,ZHANG Cheng,et al.Fusion characteristics in co-combustion of coal with industrial and municipal sludge[J].Journal of Fuel Chemistry and Technology,2014,42(9):1068-1076.(in Chinese)
[12]VASSILEV S.V,BAXTER D,VASSILEVA C.G.An overview of the behaviour of biomass during combustion:Part I.Phase-mineral transformations of organic and inorganic matter[J].Fuel,2013,112(3):391-449.
[13]VASSILEVA C.G,VASSILEV S.V.Behaviour of inorganic matter during heating of Bulgarian coals:1.Lignites[J].Fuel Processing Technology,2005,86(12):1297-1333.
[14]周丽娜.磷石膏、钾长石和碳酸钙体系反应历程研究[J].磷肥与复肥,2010,25(5):15-17.ZHOU Li-na.Study on reaction of phosphogypsum,potash feldspar and calcium carbonate system[J].Phosphate and Compound Fertilizer,2010,25(5):15-17.(in Chinese)
[15]贺中央,刘百宽,傅秋华,等.微晶白云石的热分解行为[J].耐火材料,2013,47(1):19-23.HE Zhong-yang,LIU Bai-kuan,FU Qiu-hua,et al.Thermal decomposition behavior of microcrystalline dolomite[J].Naihuo Cailao,2013,47(1):19-23.(in Chinese)
[16]尹龙晓,周兴求,伍健东,等.污泥与秸秆掺烧的燃烧特性研究及应用[J].可再生能源,2013,31(1):71-75.YIN Long-xiao,ZHOU Xing-qiu,WU Jian-dong,et al.The combustion characteristics and application of sludge mixed with straw[J].Renewable Energy Resources,2013,31(1):71-75.(in Chinese)
[18]DOTE Y,OGI T,YOKOYAMA S,et al.Analysis of oil derived from liquefaction of sewage sludge[J].Fuel,1992,71(9):1071-1073.