简介:Accordingtothenationalpolicyonenhancingenvironmentalprotection,thefivemajorpowergenerationcompaniesarerequiredtocarryoutfluegasdesulphurization(FGD)franchisingpilotprojectinthermalpowerplants.Thispaperintroducesthedevelopmentofthispilotproject,includingthefoundation,purpose,objects,demandsandprocedures.Italsodiscussessomemainproblemsencounteredduringimplementation,involvingtheunderstanding,legislation,financing,taxation,pricingandmanagementoffranchise.At...
简介:Adesulphurizationretrofitprojectwhichadoptedapatenttechnologywithindependentpropertyrights,DatangInternationalDouhePowerPlant'sUnitNo.8hassmoothlycarriedout168-htrialoperationinMarchthisyear.Theprojectofthe200-MWcoal-firedunitstartedtoconstructinSeptember2003,takingeighteenmonthscompletingconstructionandcommission.Thedesulphurizationsystemhasusedalimestone-gypsumwetdesulphurizationprocessandreachedadesulphurizationefficencyofover95%.
简介:ThispaperintroducedtheresearchbackgroundandtechnicalfeaturesofBaosteel’ssinteringfluegasdesulfurization(FGD).Itwasalsonamedswirl-jet-absorbingwetlimestone-gypsumsinteringFGDtechnology.Bymeansofindustrialonlinepilotplants,throughcontinuousrunningandorthogonaltests,theeffectsofvariousinfluencingfactorsonSO2removalefficiencyofBaosteelsinteringfluegasdesulgurization(BSFGD)werestudiedcarefully.TheresultsindicatethattheslurrypHvalue,temperature(T)andflowrate(Q)ofinletfluegas,liquidlevel(H)intheabsorberandfluegasjetvelocity(V)arethemaininfluencingfactors.Furthermore,whenpHisbetween5.0and5.5,Hisbetween4.2mand4.3m,Qis43000m3/h,Tisbelow65℃andVisbetween20m/sand28m/s,thebestdesulfurizationefficiencycanbeavailable.
简介:摘要:随着环境形势的日益严峻,我国对于燃煤电厂的污染物排放限值逐渐降低。自原环境保护部于2015年12月发布《全面实施燃煤电厂超低排放和节能改造工作方案》后,石灰石-石膏湿法脱硫工艺在我国机组脱硫技术应用占比超过了90%。在吸收塔内除发生二氧化硫的传质吸收反应,还伴随有烟气与浆液的换热蒸发过程,出口烟气一般为48℃~52℃的饱和或者过饱和状态。由于吸收塔下游无烟气再热装置,烟囱排放的烟气抬升高度较低,其中水汽极易在环境空气中冷凝形成液滴并在烟囱附近飘落。然而,部分电厂的液滴落地后类似泥点,形成所谓石膏雨,不仅造成视觉污染,更严重的是改变了当地环境,并给电厂及周边建筑物带来腐蚀威胁。据统计,上海外高桥电厂、山东聊城电厂、江苏利港电厂等均存在较为严重的烟囱石膏雨问题。本文以某机组为例,通过相关参数测试分析诊断石膏雨产生原因,并提出了解决方案,以期为后续治理提供参考。
简介:Calciumsulfatehemihydrate(CSH)whiskersweresynthesizedbyphasetransitioninCaCl2solutionunderatmosphericpressure.Analytical-gradecalciumsulfatedihydrate(ARCSD)wasusedastherawmaterialforthesynthesisofCSHwhiskers,accordingtoorthogonalexperiments.Theeffectsofreactiontemperature,ARCSDcontent,H2SO4content,andreactiontimewereinvestigated,andthecrystallizationconditionswereoptimized.Theas-preparedCSHwhiskersdisplayedaregularmorphologyandahighlyuniformsize,withanaspectratioof105.AsimulationsystemwasalsoestablishedbyblendingvarioussulfateswithARCSD,toevaluatetheeffectsofimpuritiesinfluegasdesulfurization(FGD)gypsum.ThemainaimwastoprepareCSHwhiskersdirectlyfromFGDgypsum,withoutanypurification,usingtheoptimizedconditions.Thisisafacilepotentialalternativeprocessforlarge-scaleproductionofCSHwhiskersusingabundantFGDgypsumassourcematerials.
简介:重点阐述了韶关发电厂10#、11#机组石灰石石膏湿法烟气脱硫装置(FGD)运行优化调整试验.该发电厂的300MW机组根据试验结果确定了运行调整参数并实际应用.在保证脱硫效率和SO2排放浓度达到环保要求的前提下,FGD电耗从1.5%下降到了1.3%.
简介:摘要:针对脱硫后净烟道低温腐蚀问题,采用使用改性提纯酚氟树脂、重晶石、纳米铬粉、防介质固体填料等特种材料精加工而成高聚合物涂料,有效缓解低温腐蚀问题。并且通过实际运行,减少烟道泄漏,延长了钢质烟道的使用寿命,其节能效果明显。