陜北侏羅紀(jì)煤氧化自燃特性實驗研究.pdf

1、論文題目：陜北侏羅紀(jì)煤氧化自燃特性實驗研究專業(yè)：安全技術(shù)及工程碩士生：王凱（簽名）指導(dǎo)教師：鄧軍（簽名）摘要我國西北地區(qū)侏羅紀(jì)煤層儲量豐富，厚度大、煤質(zhì)優(yōu)、變質(zhì)程度較低，自然發(fā)火現(xiàn)象較為嚴(yán)重。本論文以陜北侏羅紀(jì)煤為研究對象，采用理論分析與實驗研究相結(jié)合的方法，對侏羅紀(jì)煤氧化過程中的微觀及宏觀特性進(jìn)行了研究，研究結(jié)果對侏羅紀(jì)煤自燃機(jī)理的揭示、煤自燃預(yù)測預(yù)報及防治技術(shù)研究提供了一定的理論依據(jù)。采用工業(yè)分析儀、元素分析儀、X射線衍射儀和傅里葉

2、紅外光譜儀等，分析了陜北侏羅紀(jì)煤的煤質(zhì)組成、芳香微晶結(jié)構(gòu)和官能團(tuán)特征，掌握了陜北侏羅紀(jì)煤的物理化學(xué)結(jié)構(gòu)特性。通過對陜北侏羅紀(jì)煤的同步熱分析實驗，分析得出了表征煤自燃特性的5個特征溫度，并對氧化過程中的水分蒸發(fā)及脫附階段和吸氧增重階段進(jìn)行了熱分析動力學(xué)分析，掌握了陜北侏羅紀(jì)煤氧化過程中表觀活化能及指前因子等動力學(xué)參數(shù)，找出了滿足Bagchi法的侏羅紀(jì)煤氧化過程最概然機(jī)理函數(shù)。針對陜北侏羅紀(jì)煤氧化過程中的特征溫度，利用傅里葉變換紅外光譜儀分

3、析了煤分子結(jié)構(gòu)中官能團(tuán)的變化規(guī)律，確定出侏羅紀(jì)煤分子結(jié)構(gòu)中對氧化反應(yīng)影響較大的活性官能團(tuán)。通過分析陜北侏羅紀(jì)煤自燃程序升溫過程中耗氧速率、氣體產(chǎn)生率和放熱強(qiáng)度等宏觀自燃特性參數(shù)，并與其他成煤時期煤樣對比，結(jié)合氧化自燃過程中的動力學(xué)參數(shù)及活性官能團(tuán)變化規(guī)律分析，從微觀闡明了陜北侏羅紀(jì)煤氧化自燃過程。關(guān)鍵詞：侏羅紀(jì)煤；氧化自燃；熱分析動力學(xué)；活化能；官能團(tuán)研究類型：基礎(chǔ)研究Subject:StudyontheOxidationSpontan

4、eousCombustionacteristicsofJurassicCoalinNthernShaanxiSpecialty:SafetyTechnologyEngineeringName:WangKai（Signature）Instruct:DengJun（Signature）ABSTRACTInnthernChinaJurassiccoalseamsarethickerthequalityofthatareexcellentwho

5、semetamphicgradearelower，buteasierspontaneouscombustion.AdoptingthemethodofcombiningoftheyanalysiswithexperimentresearchinthispaperthemicroscopicmacroacteristicsintheoxidationprocessionofJurassiccoalseamsinnthernShaanxia

6、restudied.TheresultslayfoundationsftherevealingofJurassiccoalspontaneouscombustionmechanismtheresearchoffecastingcontrollingofcoalspontaneouscombustionUsingindustrialanalyzerelementalanalyzerXraydiffraction(XRD)Fourierin

7、fraredspectrometerthecoalcompositionaromaticmicrocrystallinestructureacteristicsoffunctionalgroupsareanalyzed.thephysicalchemicalstructureacteristicsofJurassiccoalinnthernShaanxiareresearched.Accdingtothesynchronoustherm

8、alanalysisexperiments5acteristictemperatureswhichindicatetheacteristicsofcoalspontaneouscombustionareanalyzed.Theapparentactivationenergypreexponentialfactsthatarekiicparametersarestudiedintheoxidationprocesswhichinclude

9、sthewaterevapationdesptionstageoxygenweightgainingstage.themostprobablemechanismfunctionwhichisbasisonmethodofBagchiofoxidationprocessisidentified.AdoptingtheFourierinfraredspectrometerthevariationsofthefunctionalgroupsi

10、nthemolecularstructureofJurassiccoalinnthernShaanxiareanalyzedwhichareattheacteristictemperatures.Theresultsofthegreaterinfluenceonthereactivefunctionalgroupswhichincludehydroxylmethyletherinthemolecularstructureontheoxi

11、dationreactionareresearched.Accdingtotheanalysisofmacroparametersofoxygenconsumptionrategasproductionrateheatingintensityintheprocessofcoalspontaneouscombustiontemperatureprogramedexperimentcontrastingwiththeothercoalsam