專業(yè)外語(yǔ)第九組

MechanismsofEvaporationLossesGroup10Class7CatalogIntroduction1Words&Phrases2ImportantSentences3Methodofreducinglosses4Summaryofthearticle5WhatisEvaporation?Duringtheevaporationprocess,waterturnstoavapor.IntroductionoftheEvaporation

1701年，普魯士國(guó)王腓特烈一世想擁有一件珍品——一個(gè)壁上嵌滿琥珀的房間VariationoftemperatureinsidethetankEvaporationlossEvaporationlosses蒸發(fā)損耗Evaporation

[??v?p??re??n]n.蒸發(fā)，發(fā)散;消失;汽化;蒸發(fā)法Breathinglosses(standingstorageslosses)靜止儲(chǔ)存損耗/呼吸損耗Fillingandemptyingoperations

收發(fā)油作業(yè)Emissionsources發(fā)散源

emission [??m???n]n.排放，輻射;排放物，散發(fā)物（尤指氣體）;（書刊）發(fā)行，發(fā)布（通知）Utilizationrateofthetank儲(chǔ)罐利用率

utilization[?jut?la??ze??n]n.利用，使用，效用Words&Phrases

Atmosphericconditions大氣條件

atmospheric

[??tm??sf?r?k,]adj大氣的;大氣引起的Vaporbalancing蒸汽平衡Gasolinestation加油站beexpelledfrom排出；被驅(qū)逐B(yǎng)esubjectedto遭受.受到…控制Vaporrecoverysystems蒸汽回收系統(tǒng)Words&PhrasesImportantSentencesExternalandinternalfloating-rooftanksareemissionsourcesbecauseofevaporativelossesthatoccurresultfromstandingstorageandwithdrawalofliquidfromthetank.（P167,paragraph2）

由于儲(chǔ)罐儲(chǔ)存和發(fā)油期間產(chǎn)生蒸發(fā)損耗，故內(nèi)、外浮頂罐也是發(fā)散源。

emissionsources發(fā)散源resultfrom產(chǎn)生于…，由…引起;

Evaporativelossduringemptingoccurswhenairdrawnintothetankduringliquidremovalbecomessaturatedwithorganicvaporandexpands,thusexceedingthecapacityofthevaporspace.(3.5.1.1)

在發(fā)油期間，隨液體流出，空氣被抽入罐內(nèi)，

空氣為油品蒸汽所飽和以及氣體膨脹，超過(guò)了

蒸汽空間容納能力時(shí)就產(chǎn)生蒸發(fā)損耗。ImportantSentencesThecontrolefficiencyofthismethodrangesfrom60to99percent,dependingonthetypeofroofandsealsinstalledandonthetypeoforganicliquidstored.(3.5.1.1)根據(jù)所安裝內(nèi)浮頂和密封以及所處油品的類型，這種方法的控制效率在60%-99%范圍內(nèi)。

Vaporbalancing

canhavecontrolefficienciesashighas90to98percentifthevaporsaresubjectedtovaporrecoveryorcontrol.

若進(jìn)行蒸汽回收或控制，蒸汽平衡的效率可高達(dá)90%-98%。

Vaporbalancing蒸汽平衡ashighas高達(dá)besubjectedto

遭受，經(jīng)受，受到….控制Rooffittinglossemissionsfromexternalfloating-rooftanksresultfrompenetrationintheroofbydeckfittings,suchasaccesshatch,gaugefloatwell,gaugehatch/samplewell,rimvents,rooflegs,etc.罐頂附件穿過(guò)罐頂，產(chǎn)生外浮頂罐罐頂附件損耗物。這些附件是人孔，計(jì)量浮子井，計(jì)量孔/取樣井、邊緣呼吸器、浮頂立柱等。Reducelosses1.Decreasingthetemperaturedifferenceinsidetank2.InstalltheflapperReducelosses3.vapor

recoveryReducelosses4.ToeliminatethegasspaceonthesurfaceofoilSummaryofthearticleThis

article

discusses

the

mechanisms

of

oil

evaporation

loss,analyzes

the

reasons

for

oil

loss

,takes

appropriate

measures

according

to

the

problems

exposed

in

the

process

of

collection,

store,

transportation

to

reasonabl