气相中的稳态分子扩散 (1).pdf
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1、Principles of Chemical EngineeringChemical engineering science:An engineering discipline that changes the chemical composition and physical properties of materials on a large scalepath:chemical reaction processSeparation and purification processChanging process of physical state and propertycharacte
2、ristic:a large scaleproductmarketmarketIntroduction1.The researching object and task of chemical engineering It started from 20th century,with more than 100 years history1893 Chicago conference of chemists40S the dawn of chemical reaction engineeringengineering research(fluid bed catalytic cracking,
3、styrene butadiene rubber synthesis,Atomic Energy Engineering)50s Forming the branch of chemical reaction engineering70s systematic engineering of chemical engineeringnow bioengineering,environmental engineeringm i l e s t o n eIntroductionThe history of chemical engineering Whats the production proc
4、ess of chemical engineeringSimilarities and differences of production processes of papermaking,metallurgy and alchemyDifferences:There exist some differnce in materials,products,the purpose of product and steps.Similarities:Both of them have chemical reaction and take chemical reaction as the center
5、,which involves physica operation such as material transportation,material heating/cooling,etcIntroductionThe main research contents of principles of chemical engineering conclusion:Different chemical production processes are connected by similar chemical reactions and several chemical unit operatio
6、nsThe common problems of unit operations:IntroductionThe main research contents of principles of chemical engineering Basic principles of unit operationThe structure of typical equipmentEquipment moldingProcess dimension calculation of equipmentResearch object:Unit OperationInvolved fields:chemical
7、industrypetrochemical industryoil refiningmetallurgyproduct processingpharmaceutical manufacturingnuclear industrybiochemical engineeringenvironment protection,materials and space technologyIntroductionThe main research contens of principles of chemical engineeringengineeringmomentum transferunit op
8、erationheat transfermass transferchemical reactor chemical reaction engineeringtransference engineeringprocessproduction of chemical engineeringIntroductionThe main research contents of principles of chemical engineeringClassification of unit operation:(1)Those that follow the basic laws of fluid po
9、werfluid transportation,sedimentation,filtration,fluidization of solid,etc(2)Those that follow the basic laws of heat transferheating,cooling,condensation,evaporation,etc(3)Those that follow the basic laws of mass transfer:distillation,absorption,extraction,crystallization,drying,membrane separation
10、,etcIntroductiontransference engineering:Momentum transfer Heat transfer Mass transferThe main research contents of principles of chemical engineeringthe process diagram of the process diagram of urea synthesis urea synthesis distillationevaporationcrystallizationfliterationdryingNH3NH3compressionfi
11、nal productcondensationH2Oheat transfermass transferfluid dynamicspump conveyingCO2synthesistransfer processunit operationmomentum transferfluid conveyingmixingfliterationsedimentationheat transferheatingcooling evaporationrectificationmass transferabsorption(g/l)rectification(l/l)extraction(l/l,s/l
12、)crystallization(l/s)adsorption(s/g,s/l)Introduction绪论requirements for teaching objectives1、Master the basic chemical engineering principle process,typical equipment structure,performance and operation principles;2、Master the basic calculation methods and equipment design3、Seek for suitable operatio
13、n conditions,explore the multiple orientations of the process of fortification and the different ways to improving equipments.Methods1、distinguish primary and secondary factors2、pay attention to the meaning,unit and dimension of physical quantity3、understand basic concepts,principles and operation m
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