聚甲醛裝置自控設計.pdf

1、Y1212782伊7t『大磐伊川犬學工程碩士專業(yè)學位論文題目聚甲醛裝置自控設計培養(yǎng)單位指導教師指導教師完成日期2007年5月日四川大學黃衛(wèi)星教授陳昌榮高工工程領域化學工程授予學位日期2007年6月日四川大學工程碩士學位論文ControlSystemDesignonPOMPlantGraduate：HeDeruingSupervisors：HuangWci—xing，ChertChangrongThedesignisfortheproce

2、sscontrolofPOM(polyformaldehyde)plantWithhighconcentratedformaldehydeasthematerial，thetrioxymethyleneanddioxolanewassynthesizedandwasfurtherpolymcrizedtoPOM。TheformaldehydeWaseasilyoxidizedtoformicacidTheintermediateprod

3、ucteasilycrystallizedorsclfpolymerizedtobyproductDuetocomplexityoforganicchemicalreactionaccuratemeasurementwasemphasizedThewholedesignconformedtogeneralchemicaldesignregulationsandespeciallyfocusedOntheprocesscontroldes

4、ignworktofulfillacertainobjectunderspecializedprocessconditionsSafetyandrehabmtyareimportantforcontrolsystemThemajormanufactureforDCS田istributcdControlSystem)wasselectedThedetailconfigurationofhardwarewassctbyspecialists

5、whentechnologyrequirementsweleclearsuchascontrollerperformancesizeandredundantrequirementConsideringtheimportanceoftheexplosionproofmethodandearthdesignwhichusuallycause翻h(huán)】reofthewholesystemthethesisdiscussedthegnindetai

6、landgaveouttheguidelinesforfieldconstructionThere瓣manypossibilitiesforiusizl】memselectionsdependingOntheprocessmediumandmcasurumentandcontrolrequirementsMostofinstrumentswcl“eredesignedbasedonexperienceandmcdinlncharacte

7、risticsinthethesisTheoperationforoueyearhasprovedtheireffectivenessthatthedesignexpectedTheprocessforPOMismadeupofcontinuousandbatchwayTheformerwassimilartogeneralchemicalplantwhileforthelatterthedetailedcontrolandoperat

8、iondesignsw∞carriedoutfortypicalbatchunitTheflowratecontrolwithhighaccuracyisverydifficultwhichmayrealizebythclossweightmethodAccordingtoaccumulatedexperiencesandanalysisforitsprinciple，allimprovedmethodandaprimarymathem