当前位置:考试网  > 试卷库  > 技能鉴定  > 其他类  > 石油石化职业技能鉴定  > 供水调度工  > 如何协调好一泵房台时、二泵房台时、清水池水位的关系?简述清水池水位持续下降的原因,作为调度应如何调度。
试题预览

如何协调好一泵房台时、二泵房台时、清水池水位的关系?简述清水池水位持续下降的原因,作为调度应如何调度。

查看答案
收藏
纠错
正确答案:

清水池的库容通常在设计时应满足日供水量的 10%,我们清水池的库容就是 8 万 m3。 不低于 1.5m

①《生活饮用水卫生标准》中规定出厂水游离性余氯在与水接触 30min 后不应低于 0.3mg/L。因此需要保证清水池水位处于一定高度以上,确保足够的消毒接触时间。

②清水池水位高位运行时,如果清水池进水量偏小,容易造成停留时间过长。氯气自我消耗增加,降低出厂水余氯,增加氯耗。

④清水池水位过低,清水池入口在线式余氯仪采样泵采不到水。水位过高清水池溢流,浪费水量。

⑤清水池水位的高与低将影响到二泵房机泵的供水量。

(3)异常处理:①清水池水位低时应增加一泵房台时、增加滤格,暂停排泥和反冲洗,必要时减少二泵房台时

②清水池水位高时应减少一泵房台时,减少滤格,开排泥和反冲洗水厂通常为平稳生产,为便于加矾、加氯等,清水池基本维持在 2.5m 左右运行,一泵房台时与二泵房台时相对较固定,保持一定水量,选择最佳的机组搭配,调节一、二泵房水量差额,保证生产用水、二泵房正常运行,同时确保氯气与水有一定的接触反应时间。

清水池水位持续下降的原因

①出水量较大导致清水池水位持续下降。

可能原因:供大于产,高峰期间压力低,出水量较大;利用库容调节;错误估计时水量变化,进水量未及时调整,出水量较大;

②外部突发事件导致

如某厂设备故障减台时;厂外爆管;火警等,造成供水量较大。③因内部原因导致滤池冲洗过于集中导致下降。合理安排滤池冲洗周期,避免消耗。水质如浊度不达标等,减少进水量,导致水位下降。一泵房设备故障,进水量暂不能保障。

答案解析:

暂无解析

你可能感兴趣的试题

在设计科学课程时,要从项目设计、__________和项目改进三个维度体现项目完成能力。

基于__________学习理论,科学教育应重视儿童的已有经验,让儿童从探究中自主发展科学理解。

提出“民贵君轻”思想的是()

夸美纽斯的“___”强调人类本性是善良的,只要发展人的智力,可使个人和社会得到发展。

试述近代中学教育发展的新变化。

热门试题 更多>
试题分类: 理论与实务
练习次数:0次
试题分类: 口语
练习次数:0次
1.Thefailureofahigh-profilecholesteroldrughasthrownaspotlightonthecomplicatedmachinerythatregulatescholesterollevels.Butmanyresearchersremainconfidentthatdrugstoboostlevelsof'good'cholesterolarestilloneofthemostpromisingmeanstocombatspirallingheartdisease. 2.DrugcompanyPfizerannouncedon2Decemberthatitwascancellingallclinicaltrialsoftorcetrapib,adrugdesignedtoraiseheart-protectivehigh-densitylipoproteins(HDLs).Inatrialof15000patients,asafetyboardfoundthatmorepeoplediedorsufferedcardiovascularproblemsaftertakingthedrugplusacholesterol-loweringstatinthanthoseinacontrolgroupwhotookthestatinalone. 3.Thenewscameasakickintheteethtomanycardiologistsbecauseearliertestsinanimalsandpeoplesuggesteditwouldlowerratesofcardiovasculardisease."Therehavebeennoredflagstomyknowledge,"saysJohnChapman,aspecialistinlipoproteinsandatherosclerosisattheNationalInstituteforHealthandMedicalResearch(INSERM)inPariswhohasalsostudiedtorcetrapib."Thiscancellationcameasacompleteshock." 4.TorcetrapibisoneofthemostadvancedofanewbreedofdrugsdesignedtoraiselevelsofHDLs,whichferrycholesteroloutofartery-cloggingplaquestotheliverforremovalfromthebody.Specifically,torcetrapibblocksaproteincalledcholesterolestertransferprotein(CETP),whichnormallytransfersthecholesterolfromhigh-densitylipoproteinstolowdensity,plaque-promotingones.Statins,incontrast,mainlyworkbyloweringthe'bad'low-densitylipoproteins. Underpressure 5.Researchersarenowtryingtoworkoutwhyandhowthedrugbackfired,somethingthatwillnotbecomeclearuntiltheclinicaldetailsarereleasedbyPfizer.Onehintliesinevidencefromearliertrialsthatitslightlyraisesbloodpressureinsomepatients.Itwasthoughtthatthismildproblemwouldbeoffsetbytheheartbenefitsofthedrug.Butitispossiblethatitactuallyprovedfatalinsomepatientswhoalreadysufferedhighbloodpressure.Ifbloodpressureistheexplanation,itwouldactuallybegoodnewsfordrugdevelopersbecauseitsuggeststhattheproblemsarespecifictothiscompound.OtherprototypedrugsthatarebeingdevelopedtoblockCETPworkinaslightlydifferentwayandmightnotsufferthesamedownfall. 6.ButitisalsopossiblethatthewholeideaofblockingCETPisflawed,saysMotiKashyap,whodirectsatherosclerosisresearchattheVAMedicalCenterinLongBeach,California.WhenHDLsexcretecholesterolintheliver,theyactuallyrelyonLDLsforpartofthisprocess.SoinhibitingCETP,whichpreventsthetransferofcholesterolfromHDLtoLDL,mightactuallycauseanabnormalandirreversibleaccumulationofcholesterolinthebody."You'reblockingaphysiologicmechanismtoeliminatecholesterolandeffectivelyconstipatingthepathway,"saysKashyap.Goingup 7.Mostresearchersremainconfidentthatelevatinghighdensitylipoproteinslevelsbyonemeansoranotherisoneofthebestroutesforhelpingheartdiseasepatients.ButHDLsarecomplexandnotentirelyunderstood.Oneapproveddrug,calledniacin,isknowntobothraiseHDLandreducecardiovascularriskbutalsocausesanunpleasantsensationofheatandtingling.Researchersareexploringwhethertheycanbypassthissideeffectandwhetherniacincanlowerdiseaseriskmorethanstatinsalone.Scientistsarealsoworkingonseveralothermeanstobumpuphigh-densitylipoproteinsby,forexample,introducingsyntheticHDLs."Theonlythingweknowisdeadinthewateristorcetrapib,notthewholeideaofraisingHDL,"saysMichaelMiller,directorofpreventivecardiologyattheUniversityofMarylandMedicalCenter,Baltimore. Questions7-13 Matchtorcetrapib,HDLs,statinandCETPwiththeirfunctions(Questions8-13)..WritethecorrectletterA,B,CorDinboxes8-13onyouranswersheet.NBYoumayuseanylettermorethanonce. 7.Ithasbeenadministeredtoover10,000subjectsinaclinicaltrial. 8.Itcouldhelpridhumanbodyofcholesterol. 9.Researchersareyettofindmoreaboutit. 10.Itwasusedtoreducethelevelofcholesterol. 11.AccordingtoKashyap,itmightleadtounwantedresultifit'sblocked. 12.Itproducedcontradictoryresultsindifferenttrials. 13.ItcouldinhibitLDLs.Listofchoices A.TorcetrapicB.HDLSC.StatinD.CETP
试题分类: 阅读
练习次数:2次
试题分类: 写作
练习次数:0次
Asianeconomieswillcontinuetoexpandrapidlyinthenexttwoyearsonthebackofforeigninvestments,exportsanddomesticdemand,butwillnotbefreeofworries,accordingtoarecentsecuritiescompanyeconomicreport.Massiveinfrastructurespending,thebenefitsofpastinvestmentsandderegulationandgrowingregionaltradewillpushalongregionalgrowth. ThereporttippedChina’sgrossdomesticproducttogrowby9.5percentin1996and10.5percentin1997,andHongKong’stogrowby4.3and5.0percent.Singapore’srealGDPwasforecasttogrowby7.6and7.4percent,Malaysia’sby8.6and8.1percent,Thailand’sby8.8and8.4percent,Indonesia’sby7.3and7.1percentandPhilippines’by5.6and5.8percent. “However,allisnotrosy,”cautionedthereport,whichlistedoverheatingastheregion’sbiggestchallengeintheshorttermandskilled-laborshortagesinthelongrun. Itcitedstrainsfromrapidgrowththathadbeguntostretchcurrentaccountdeficitsandspurinflationinsomeregionaleconomies,whichcouldpreventtheircentralbanksfromloweringinterestrates. “Thisimpliesthateconomicvulnerabilitytounexpectedshockswillremainhigh,”thereportsaid,forecastingafurthertighteningofmonetarypolicyincountriessuchasthePhilippinesandMalaysia,andnosignificanteasinginThailand,IndonesiaandChina. CrosbySecuritiesalsocitedmassivenewinvestmentprogramsgeneratedbydemandsoninfrastructuresuchaspower,telecommunicationsandtransportwhichhadfuelledover-heating. ItsaidAsiawouldalsofaceabiggerchallengefromnewlyderegulatingeconomiesinEasternEuropewhichofferedlowercostsandbetter-educatedworkerstoforeigninvestors. Asia’smainforeigninvestorsshould,however,continuetoexpandtheirpresenceintheregion,thesecuritieshousesaid,notingnewtrendsofintra-Asianinvestment. Singaporeisshiftingitslowervalue-addeddiscdriveandelectronicsindustrytoMalaysia,whichinturnismovingsomeofitsgarment-makingandconsumerelectronicsmanufacturingtoIndonesiaandThailand.Thailand,MalaysiaandSingaporeareincreasinglyinvestinginVietNam,MyanmarandLaos. “Asiawillbenefitfromthistrendinseveralways,”thereportsaid. ()1Asiaeconomywillcontinuetogrowbecauseof_____________. A.foreigninvestmentB.demandsinAsiancountries. C.exportD.alloftheabove ()2Inthenext2years,thehighesteconomicgrowthwillappearin____________. A.SingaporeB.Thailand C.HongKongD.China ()3Yearslater,theprobleminAsianeconomymaybe_________________. A.toolittleinvestmentB.toomuchinvestment C.notenoughqualifiedlaborsD.monetaryinstability ()4Accordingtothisreport,economicchangesinEastEuropeare___________. A.harmfulB.challenging C.helpfulD.useless ()5ThereportisabouttheprospectofAsianeconomy. A.optimisticB.pessimistic C.moreoptimisticthanpessimisticD.morepessimisticthanoptimistic
试题分类: 初级(阅读)
练习次数:16次
SectionD Evenifyougetworkdoneandgenerallygetalongwithco-workers,youcouldhavehabitsthatbugyourboss(nottomentionyourofficemates).Whilethesequirksmaynotnecessarilygetyoufired,theycertainlycankeepyoufromclimbingthecorporateladder.We’veuncoveredanumberofhabitsthatbugyourbossandoffertipsonhowtoavoidthem. AccordingtoLaRhondaEdwards,ahumanresourcesmanagerwiththirteenyearsofHRexperience,tardinessisoneofthebiggestconcernsformanagers.“Ifthenormalworkdaystartsat8o’clock,thentheexpectationisthatyou’reintheofficereadytostartyourday,”sheexplains.Heradvicetothechronicallylate?“Planahead,”sheurges.“Ifyoulive50minutesaway,youdon’tleave50minutesearly.Tagonextratimeandanticipateroadblocks.”Somepeopleevensettheirclocksafewminutesearlytoensurethatthey’reontime.Differentbossespreferdifferentmodesofcommunication.LindseyPollak,aworkplaceexpertandauthorofGettingfromCollegetoCareer,saysifyoutextyourbossandsheprefersin-personmeetings,“eitheryourinformationwon’tgetacrossoryou’llirritate[her].”Fortunately,there’sasimplefix:askyourbosshowandwhentosendupdates.Ifyou’retooshytoaskoutright,thenPollaksuggestsobservinghowtheycommunicatewithyou.“Ifyouhaveabosswhocommunicatesonceadaybyemail,that’stheboss’preferredfrequencyandmethodofcommunication,”explainsPollak. Acluttered,messyworkspacecangiveyourbosstheimpressionthatyou’relazyordisorganized,sotrytokeepyourdeskneat.“Neverputmoreonyourdeskthanyou’regoingtoworkonfortheday,”recommendsEdwards.“Attheendoftheday,makesureyousetupforthenextday.Imaybeworkingonfivethingsatonce,butattheendoftheday,they’regone,andIsetupforthenextday.”Mostmanagerswouldratheryouaskaquestionthanmakeamistake,butmanyquestionscanbeansweredonyourown.“IsthissomethingyoucouldGoogleoraskacolleague?”wondersPollak.“Theinternetissovastthatalotofinformationyoucangetyourself.”Ifyoumustapproachyourbosswithaquestionorissue,thenPollakrecommendsbrainstormingbeforehand.“Ratherthansaying‘Thisclientisterrible.WhatshouldIdo?’thinkaboutpotentialsolutions,”shesays. Cellphonesarepracticallyubiquitousintheworkplacethesedays,butit’sstilldisruptiveanddisrespectfulwhentheygooffduringameeting.Edwardssaysthatyoushould,“putyourcellphoneonvibrateorleaveitinyourownofficesoit’snotadistraction.”Thatwayyouwon’tbetemptedtotexteither ()6.Accordingtothearticle,howmanypiecesofadviceareofferedhere?. A.TwoB.ThreeC.FourD.Five(B) ()7.Whatisthisarticleabout?. A.Howtobesuccessfulintheworkplace. B.Howtocommunicatewithyourboss. C.Howtoavoidquirksthatannoyyourboss. D.Howtoutilizeyourmobilephonesatwork. ()8.Whatdoesthephrase“togetacross”inthesentence“…sheprefersin-personmeetings,“eitheryourinformationwon’tgetacrossoryou’llirritate…”ofthesecondparagraphmean?. A.TobecommunicatedB.Tobepassed C.TobepromotedD.Tobeanticipated(A) ()9.Accordingtothearticle,whichofthefollowingmodesofcommunicationisthebestwhencommunicatingwithyourboss?. A.Anywaysyouthinkareappropriate. B.In-personmeetings. C.Correspondence. D.Thewayyourbosscommunicateswithyou.(D) ()10.Whichofthefollowingstatementsisnotmentioned? A.Employeesshouldpayrespecttotheirbossesanytime. B.Employeesshouldplanbeforehandsoastoshowupatworkontime. C.Employeesshouldnotlettheirmobilephonesgooffduringmeetings. D.Employeesshouldkeeptheirdesksneatandorganized.
试题分类: 初级(阅读)
练习次数:9次
Readthetextaboutcareer-planningservices. Choosethebestsentencefromtheoppositepagetofilleachofthegaps. Foreachgap9–14,markoneletter(A-H)onyourAnswerSheet. Donotuseanylettermorethanonce. Thereisanexampleatthebeginning.(0) YourCareerPathCanLeadYouAnywhere Weusedtobeadvisedtoplanourcareers.Weweretoldtomakeaplanduringthelaterstagesofoureducationandcontinuewithitthroughourworkinglives.(0)_____somepeoplestillseecareersinthisway.However,topursueasingleoptionforlifehasalwaysbeenunrealistic. Planningforasinglecareerassumesthatwesetoutwithafullunderstandingofourlikesanddislikesandtheemploymentopportunitiesopentous.(9)____Formostpeoplethisdegreeofcertaintyaboutthefuturedoesnotexist. Ourinitialchoiceofcareerpathandemployerisoftenbasedoninadequateknowledgeandfalseperceptions.Butwithageandexperience,wedevelopnewinterestsandaptitudesandourprioritiesalter.Thestructureoftheemploymentmarketand,indeedofemploymentitself,issubjecttochangeasbothnewtechnologiesandnewworksystemsareintroduced(10)_____Wemustfacetheuncertaintiesofaportfoliocareer. Itisclearfromtherecentpastthatwecannotforeseethechangeswhichwillaffectourworkinglives.Thepaceofchangeisaccelerating,asaresultofwhichtraditionalcareerplanswillbeofverylimiteduse.(11)_____Theywillneedupdatingtoreflectchangesinourowninterestsaswellasintheexternalworkenvironment.Flexibleworkersalreadyaccountforabouthalftheworkforce.(12)______Wearelikelytofaceperiodsascontractworkers,self-employedfreelances,consultants,tempsorpart-timers. Manyemployersencouragestafftowriteapersonaldevelopmentdevelopment(PDP)(13)_____Althoughsomepeopleuseitonlytoreviewtheskillsneededfortheirjob,aPDPcouldbethenucleusofwidercareerplan–settingoutalternativelong-termlearningneedsandaplanofself-development. AreportissuedbytheInstituteofEmploymentStudiesadvisespeopletoenhancetheiremployabilitybymovingfromtraditionaltechnicalskillstowardstheattainmentofarangeoftransferableskills.(14)_____Instead,specialschemesshouldbeestablishedtoencouragepeopletoexaminetheireffectivenessandtoconsiderawiderrangeofneeds. 0ABCDEFGH AThisdualeffectmeansthattherelationshipbetweenemployersandworkershasevolvedtosuchandextentthatwecannolongerexpectalong-termrelationshipwithoneemployer. B.Itcarriesanimplicitassumptionthatweourselves,andthejobsweenter,willchangelittleduringourworkinglives. C.Thisgrowthsuggeststhatacareerplanshouldnotbeexpressedonlyintermsoffull-timeemploymentbutshouldmakeprovisionforthepossibilityofbecomingoneofthe. Dthisisasummaryofone’spersonallearningneedsandanactionplantomeetthem. EConsequently,theymustnowaccommodateanumberofobjectivesandenableustoprepareforeachonacontingencybasis. FHowever,itwarnsthatemployersoftenidentifytrainingneedsthroughformalappraisals,whichtaketoonarrowaviewofdevelopment. G.Suchafreelanceofconsultantwouldbeconstantlyindemand. HWewereexpectedtoworktowardsthatonecleargoalandtoconsideracareerchangeasabadthing.
试题分类: 初级(阅读)
练习次数:0次
扫一扫,手机做题