Coal Pyrolysis

2019/7/31CoalPyrolysis2019/7/31Contents1Historyofcoalpyrolysis2Processofcoalpyrolysis3Reactorsofcoalpyrolysis4Developingtendency5Ourworks2019/7/31HistoryofcoalpyrolysisConcept:Coalpyrolysisisoftenchemicalreactionprocessbetweencoalandfuelgasunderhightemperaturecondition.Itbelongtocoalmildconversion.Theprocessesaredividedmanysortsaccrodingtothedifferentreactionconditions.2019/7/312019/7/312019/7/312019/7/312019/7/31KeywordsFourforeigncoalpyrolysisprocesses1Oilshale-Toscoal;2FMC-COED;3Garerett-flashpyrolysis;4Lurgi(gasification)FourChinesecoalpyrolysisprocesses1大连理工；2山西煤化所；3浙大；4过程工程Fourreactingbeds1moving/fixedbed;2fluidizedbed;3entrainedbed;4vibratedbedTwostagepyrolysisfurface2019/7/312019/7/31Figure1TOSCOALPROCESS2019/7/312019/7/312019/7/31Lurgi-RuhrgasProcess2019/7/31Lurgi-SpulgasRetort2019/7/31Inclinedfluidizedbedsystem(lurgi)2019/7/312019/7/312019/7/312019/7/312019/7/312019/7/31Encoalprocess2019/7/31PDFofEncoalprocess2019/7/312019/7/312019/7/311.煤提升管；2.焦仓；3.混合器；4.低温干馏炉；5.半焦提升管；6.焦仓；7.流化床锅炉；8.旋风分离器；9.洗涤器；10.气液分离器；11.焦油罐；12.脱硫箱大连理工大学DG工艺流程示意图2019/7/31中国科学院过程工程研究所“煤拔头”工艺（BT工艺）1.煤仓；2.混合器；3.料阀；4.下行床反应器；5.快速气固分离器；6.快速冷凝器；7.返料阀；8.流化床燃烧室；9.旋风分离器；10.灰仓；11.焦油泵2019/7/31中科院山西煤化所基于循环流化床的煤热解多联产工艺流程示意图1.循环流化床锅炉；2.旋风分离器；3.分灰器；4.煤仓；5.鼓风机；6.热解反应器；7.除尘器；8.气液分离器2019/7/31浙江大学流化床热解联产工艺（ZDL工艺）2019/7/31ReactorsFixedbedFluidizedbedEntrainedbedVibratedbed2019/7/31两段炉固定床2019/7/312.2固体热载体煤热解工艺---国内工艺气体热载体直立炉工艺•特点：内热立式，主要用于低变质煤低温热解,热载体以气体为主,不适用于中等粘结性或高粘结性的烟煤。•工艺过程：20～80mm的褐煤或型煤沿炉中下行,气流逆向通入进行热解；对粉状的褐煤和烟煤要预先压块,热解过程分为上、中、下三段即干燥和预热段、热解段、半焦冷却段；在上段循环热气流把煤干燥并预热到150℃;在中段热气流煤加热到500～850℃,进行热解。在下段半焦被循环气流冷却到100～150℃,最后排出。2019/7/31FLUIDIZEDBED2019/7/312019/7/31Entrainedbed(gasification)2019/7/312019/7/31Vibratedbed(microreactor)2019/7/31Vibratedbedmicroreactor2019/7/312019/7/312019/7/312019/7/312019/7/31ManyProblems1Rateofcoalconversionislow2Conversionconditionisharsh3Processissimple4Catalysisislowefficiency5Mechanismofconversionisvague6Coalisverycomplicated2019/7/31Ourwork1Mechanismofcoalpyrolysis2Catalysis3Optimizationofpyrolysisprocess4Biomass&coaltogetherpyrolysis5Howtoexplore&enhancevalueofcoalchemicals&by-product?2019/7/31ThankYOU2019/7/312019/7/312019/7/31Occidentalflashpyrolysisprocess2019/7/312019/7/312019/7/31