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英文文献A

Limepyrolignitedryingintransitmathematicalmodelandanalysismethod

ChenWanli

Theabstract：

thearticlethroughconductstheresearchtothelimepyrolignitedryingintransitmoisturecontentchangesituation,summarizedthisprocessmathematicalmodel,forlived

producesintheprocessthelimepyrolignitemoisturecontentanalysistoprovidethetheoryreference,simultaneouslyprovidedonekindoffastconvenienceaccuratetobeabletoadapttheproductionanalysissidemethod.

[Keyword]limepyrolignitedrymathematicalmodelmoisturecontentfastcryoscope

[Categorynumber]　TD235.21　TQ56

1introduction

Puffstheammoniadynamiteisbytheoxidant,puffsthenon-ladderpowderyblastingexplosivewhichtheammoniumnitrateandtheinflammablemedicinalpreparationoilphaseandthelimepyrolignitearecomposed.Thewoodenpowderinpuffsintheammoniadynamitethefunctionalsotoactasthebulkingagentbesidestheadjustmentoxygenbalance,mayreducebetweenthenitersourammoniumpellettoacertainextentthecontacttoguardagainsttheblastingexplosivetoagglomerate;Simultaneouslyisalsoadvantageousinenhancestheblastingexplosivetheemanation,reducestheblastingexplosivecost.Becauseofhis,thelimepyroligniteisattheindispensablepositioncontinuouslyinthepowderyblastingexplosiveTherefore,theresearchlimepyrolignitetransformationperformancehasthesignificancewhichwantsextremelyagain.

2limepyrolignitetransformationnature

Thelimepyroligniteisbythelumberafterstavedry.Thelumberisbythecarbon,thehydrogen,theoxygenandsoonthecomplexorganicmatterwhichforms,itspartbelongstothecellwallingredient,anotherpartbelongstothecellcavitycontentingredient.Thelumbercellwallmainlyisgathersbythecarbonhydrationthecellulose,thehemicelluloseaswellastheligninconstitutes;Iscontainingtheresin,thegum,thefat,thewax,thedye,thefragrantbayoil,theabieticacidandthealkaloidinthecellcavityandsoon.Thelimepyrolignitemolecularformulais

，Therelativemolecularweight1011,theoxygenbalanceis-1.37；Limepyrolignitewhen162℃carbonizes,275℃whendecomposes,660℃whenlights.Limepyroligniteratioheatcapacityapproximately0.84kJ·kg-1·thermalconductivityapproximately0.17kJ·mhK-1~0.21kJ·m-1·K-1.。

Butthelimepyrolignitedensity

alongwiththematerialqualityandthemoisturecontentdifferent,intheordinarycircumstancesdoesthelimepyrolignitedenseisapproximately0.40g·cm-3~0.6g·cm-3,stack

densityapproximately0.17g·cm-3~0.24g·cm-3[1].

Thelimepyrolignitewateryconditiondividesintothreekinds,itsoneisthefreewater,existsinthecellcavityandtheintercellularspacecapillarywater;Secondistheattachedwater,iscontainsinthecellwallthewater;Thirdisthecombinedwater,forconstitutioncellchemicalcompositionwater.Inhelimepyrolignitemainmoisturecontentisthefreewaterandtheattachedwater,thecombinedwatercontentareextremelyfew[2].

Thefreewatereasytoremoveinthedryingintransit,butadherestostickcoherethewaterisremoveswithdifficulty,moreoveralongwiththemoisturecontentreduction,betweentheparticlethecapillaryvesselminification,themoisturecontentmaintainswell.Thereforethelimepyrolignitedryrequesthightemperature,thelongtimeandcontainsthequantityowdryingmediumwet[1].Theclassicaldrymethodis（approximately3g~5gputsingenerally）therightamountlimepyrolignite100℃±5℃intheconstanttemperaturedryingoven（thedefaultisdrylytwotimemeasuringerrordoesnotsurpasstothepermanentqualitydoesthequality0.3Table1isthelimepyroligniteunderaboveconditioneachhournaturequantitylosssituation.

Table1limepyrolignitedrytimemassdefect×100

Ismeasuredthetypequality/g1h2h3h4h

Rawmateriallimepyrolignite4.3349.429.9810.1210.15

Initiallyisdrythelimepyrolignite3.8195.926.506.646.66

Thelimepyrolignitelight-admittingqualityisverybad,cannotpenetratetheordinarylight,onlythentheelectromagneticwavecanshinethrough.Theexperimentindicatedthat,infraredcanthentransformbythelimepyrolignitemassiveabsorptionsintotheheatenergy,itisdifferentwithaheating,butisfrominsidetooutside,maycausethelumbertodorapidlydryly[2].Therefore,weuseBent,mayusetheinfraredlinephotosourcetocarryondrylytothelimepyrolignitesubstitutesfortheclassicstheanalysissidemethod.

3limepyrolignitemoisturecontentstopufftheammoniadynamitetheinfluence

Themassiveproductionpracticeindicatedthat,crystallizesafterthevacuumpuffstheammoniumnitratewhichobtainstherealwatercontenttobesmallerthangenerally0.05Thereforethematerialfewabsorptionsofmoisture（fromoverall）underthesentimentsituationintheneglectproductionprocess,thelimepyrolignitemoisturecontentisveryimportanttotheblastingexplosiveendproductmoisturecontentshadesound.Buttheammoniumnitratehasthepolycrystallinity,underthenormaltemperaturethesolidammoniumnitratehas5thermodynamicsstablecrystallizationanomalousform.Inwhich。

4infraredmoisturecontentfastcryoscope

dayevenscalepantheinfraredlampunderthedirectradiation,aftertriesthetypematerialtoaccepttheinfraredradiatedwavetheheatenergythemoisturecontentrapidevaporation,throughinstrumentonopticalprojectionequipmentdirectreadoutsamplematerialmoisturecontentpercentage;Notonlyreducedthetesttime,theoperationquitehasbeenalsoconvenient,couldsatisfytheblastingexplosivetoproducetheregulationcontrolneed.

PresentlybySC69-The02Cmoisturecontentfastcryoscopecarriesonhelimepyroligniteforthetestingtoolthedryingintransitanalysis.Consideredthelimepyrolignitethetransformationperformance,usesthefollowingtechnicalparametertocarryonmeasureddecides:

Inputvoltage:

220V;

Infraredlamp:

220V250W;

Infraredlampworkingvoltage:

220V;

Ismeasuredthetypequality:

10g（aspreciselyas0.1g

5limepyrolignitedrytests

Inordertostudythelimepyroligniteinfastmetermassdefectsentimentsituation,weaccordingtoabovemethodcertainquality（10g）thelimepyroligniteputsinthefastmetertodrytothepermanentquality,simultaneouslyrecordseachminutereading,andfinallywillmakethegraph（Figure1~chart4）.

MayseefromFigure1,thelimepyrolignitedoesthedryprocessinthefastmeteropresentfromeasytodifficultcurvetendency,finallyalsotendstoYuafixture.Inordertodiscussandstudiesthisprocessthemathematicalmodel,understandsthelimepyrolignitethoroughlythedrygaugelaw,inordertoinstructstheproductionwell,presentlyentersalineofanalysistakethisprocessastheexample.Table2isthisprocessdataisdetailed.

Moisturecontent

Time/minTime/min

Figure1limepyrolignitefastmetertestresultFigure20~9mintimesectionlimepyrolignite

Time/minTime/min

Figure310~19mintimesectionlimeAfterFigure420mintime

pyrolignitemoisturecontentsectionlimepyrolignitemoisturecontent

Table2rawmateriallimepyrolignitedryingtest

Time/minMoisturecontent*100%Time/minMoisturecontent*100%

10.30196.05

20.74206.16

31.30216.25

41.69226.35

52.15236.43

62.60246.50

73.04256.56

83.44266.62

93.82276.65

104.15286.70

114.45296.73

124.75306.76

135.00316.79

145.22326.81

155.44336.85

165.64346.86

175.77356.88

185.92

Presentlyconductsthepartitionresearchtoabovedata.AutomaticallydiscoversmathematicsruleusingtheEx2celgraphfunctionwhicheachsectionofscatterdiagramsdisplay,anddemonstrated（Rexpressescorrelationcoefficientinthegraph,whenR=1expressescompletecorrelation）.Carriesonwhentheanalysisafter20mindatamustmakethevariablethetransformation,namelythey-coordinatechanges“thetimemoisturecontent”by“themoisturecontent”,thex-coordinatestillwas“thetime”;Candiscoveritbetweenaftersuchtransformationthefunctionalrelation.

Mayseefromabovedataandthegraph:

（1）limepyrolignitemoisturecontentclassicsanalysismethodneeds4happroximately,butapproximatelyneeds30min~40minwiththefastmeteranalysis.

（2）limepyrolignitemaydivideintothreedifferentmoistureevaporationstageapproximatelyinthefastmeterdryingintransit:

Thefirststageisthefastevaporationstage.Becausethistimewaterminutequitebig,thecellwallisinsufficienttothemoisturecontentadsorptivecapacity,leadssendsundertheinfraredfunctionthemoisturecontentfasttransgression,andpresentsthelinearcondition.Itsmathematicalmodelisy=kx,theslopegreatlyslightlyisdecidedbythelimepyrolignitetypeandtheinitialmoisturecontent.Thisprocessneeds10minapproximatelyaccordingtothelimepyrolignitemoisturecontent.

Secondstageforrelativeequilibriumevaporationstage.Becausethistimethemoisturecontentevaporatedapproximately12~23,cellwalltheevaporativepowerwhichisleisurelytothemoisturecontentadsorptivecapacityandthelimepyroligniteabsorptioninfraredenergycausemoisturecontentapproachesgradually,displaysthegentlertunelinerisethephenomenon.Thisprocessmathematicalmodelisthemoisturecontentisthetimelogarithmicfunction,themathematicalexpressionisy=alnx+b,intheformulaaandthebsizeisdecidedbythelimepyrolignitetypeandtheinitialmoisturecontent（similarlyhereinafter）.Thisdryingintransitneeds10minapproximately.

Thirdstageforslowevaporationstage.Becausethistimewoodenpowderwatercontentalreadyverylow