试析乙醛氧化制醋酸工业反应器及工艺参数的优化

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1、湘潭大学硕士学位论文乙醛氧化制醋酸工业反应器及工艺参数的优化姓名：李永福申请学位级别：硕士专业：化学工程指导教师：刘跃进20051101乙醛氧化制醋酸工业反应器及工艺参数的优化符号说明符号说明符号物理意义单位3CB乙醛浓度kmol/mPA氧气分压MPa3Rc醋酸生成速率kmol/(hr·m);3Cc醋酸浓度kmol/mY醋酸收率%ｓ反应选择率%ｘ乙醛转化率%3CB0氧化塔第一节进口乙醛浓度kmol/mPAi氧化塔第i节平均氧气分压MPａTi氧化塔第i节反应温度K3Rci氧化塔第i节醋酸生成速率kmol/(hr·m)3RBi氧化塔第i节乙醛消耗速率kmol/(hr·m)3CBi氧化

2、塔第i节出口乙醛浓度kmol/mτ反应时间ｈPi氧化塔第i节氧气入口处压力MPａｕOGi氧化塔第i节空塔气速ｍ/s3VS氧气在使用状况下的实际流量值m／h3VN被测介质氧气的流量计示数m／hPS氧气在被测量时的绝对压力MPaPN标定介质空气在标准状态下的绝对压力MPaTs被测介质氧气在被测量时的绝对温度KTN标定介质空气在20℃时的绝对温度K3γ空气空气在20℃、1个大气压下的密度kg/m3γ氧气氧气在20℃、1个大气压下的密度kg/mM空气空气的分子量M氧气氧气的分子量a氧醛比mol/mol72AbstractThemathematicalmodelofaceticacidpr

3、oductiondevicehasbeenbuilt.Theoxygendistributionofeachjointoftheoxidecolumnhasbeensimulatedandcalculatedbyusingthemathematicalmodelofaceticacidproductiondevice，thecapacityofacetaldehydefeedinghasbeenoptimization,andtheresultsoftheanalogcomputationhavebeenusedtoguideproduction.Eachfactorwhichi

4、nfluencedacetaldehydeoxidereactionhasbeenanalyzed,thereasonabletechnologicalparameterquotanumericalvaluehasbeenputforward,thusthetechnologicalparameterofXiangweiaceticacidproductiondevicegotoptimization，thereactiveselectivityofacetaldehydeoxidegotraisedandtheyieldofaceticacidgotraised.Thecoil

5、edpipeheatexchangersofthefirst、second、thirdjointoftheoxidecolumnhavebeenimprovedandtheheatexchangingareaofthemhavebeenenlargedinorderthattheremovingheatenergypowerofthecoiledpipeheatexchangersoftheoxidecolumncouldsuittheoptimizedcapacityofacetaldehydefeeding.Asaresult,thecapacityofacetaldehyd

6、efeedingandtheoutputofaceticacidgotraisedgreatly.theoxygendistributionwarewasdesignedbyadoptingthetheoryofthecriticalapertureandcriticalgasspeedbecausetheconfiguration、apertureandthetrepanningrateoftheprimaryoxygendistributionwarewereunsuitable,andthismadethequalityandtheyieldofaceticacidlow.

7、Aftertheimplementation,theby-reactionwasrestrainedandthequalityandtheyieldofaceticacidgotraised.ThereasonsofcatalystcirculationperiodbeingshortinXiangweiaceticacidproductiondevicehasbeenanalyzedaccordingtothecatalystcirculationmechanismonacet