专业外语第九组

MechanismsofEvaporationLossesGroup10Class7CatalogIntroduction1Words&Phrases2ImportantSentences3Methodofreducinglosses4Summaryofthearticle5WhatisEvaporation?Duringtheevaporationprocess,waterturnstoavapor.IntroductionoftheEvaporation

1701年，普鲁士国王腓特烈一世想拥有一件珍品——一个壁上嵌满琥珀的房间VariationoftemperatureinsidethetankEvaporationlossEvaporationlosses蒸发损耗Evaporation

[ɪˌvæpəˈreʃən]n.蒸发，发散;消失;汽化;蒸发法Breathinglosses(standingstorageslosses)静止储存损耗/呼吸损耗Fillingandemptyingoperations

收发油作业Emissionsources发散源

emission [ɪˈmɪʃən]n.排放，辐射;排放物，散发物（尤指气体）;（书刊）发行，发布（通知）Utilizationrateofthetank储罐利用率

utilization[ˌjutɪlaɪˈzeʃən]n.利用，使用，效用Words&Phrases

Atmosphericconditions大气条件

atmospheric

[ˌætməˈsfɛrɪk,]adj大气的;大气引起的Vaporbalancing蒸汽平衡Gasolinestation加油站beexpelledfrom排出；被驱逐Besubjectedto遭受.受到…控制Vaporrecoverysystems蒸汽回收系统Words&PhrasesImportantSentencesExternalandinternalfloating-rooftanksareemissionsourcesbecauseofevaporativelossesthatoccurresultfromstandingstorageandwithdrawalofliquidfromthetank.（P167,paragraph2）

由于储罐储存和发油期间产生蒸发损耗，故内、外浮顶罐也是发散源。

emissionsources发散源resultfrom产生于…，由…引起;

Evaporativelossduringemptingoccurswhenairdrawnintothetankduringliquidremovalbecomessaturatedwithorganicvaporandexpands,thusexceedingthecapacityofthevaporspace.(3.5.1.1)

在发油期间，随液体流出，空气被抽入罐内，

空气为油品蒸汽所饱和以及气体膨胀，超过了

蒸汽空间容纳能力时就产生蒸发损耗。ImportantSentencesThecontrolefficiencyofthismethodrangesfrom60to99percent,dependingonthetypeofroofandsealsinstalledandonthetypeoforganicliquidstored.(3.5.1.1)根据所安装内浮顶和密封以及所处油品的类型，这种方法的控制效率在60%-99%范围内。

Vaporbalancing

canhavecontrolefficienciesashighas90to98percentifthevaporsaresubjectedtovaporrecoveryorcontrol.

若进行蒸汽回收或控制，蒸汽平衡的效率可高达90%-98%。

Vaporbalancing蒸汽平衡ashighas高达besubjectedto

遭受，经受，受到….控制Rooffittinglossemissionsfromexternalfloating-rooftanksresultfrompenetrationintheroofbydeckfittings,suchasaccesshatch,gaugefloatwell,gaugehatch/samplewell,rimvents,rooflegs,etc.罐顶附件穿过罐顶，产生外浮顶罐罐顶附件损耗物。这些附件是人孔，计量浮子井，计量孔/取样井、边缘呼吸器、浮顶立柱等。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