热电超低PM CEMS用户培训PPT课件

1TheworldleaderinservingscienceProprietary&ConfidentialParticulateMatterCEMS颗粒物CEMS2Challengeswithmeasuringparticulatematter颗粒物测量的技术挑战超低浓度排放条件下颗粒物监测的特点：•排放浓度低，对仪器的灵敏度要求高。•烟气中的湿度大，容易对测量造成干扰。•颗粒物的直径小，基本上都在2微米以下。3WhyConsiderPMCEMS?PMCEMS有什么特点？•Continuouslymonitorsfilterableparticulatematter连续监测过滤膜上的颗粒物（微振荡天平称重）•Unaffectedbychangesinparticulatecharacteristics不受颗粒物特性变化的影响•Builtforwetscrubberapplications按湿式污染物去除器应用设计（稀释）•DesignedtomeetUSEPAPS-11设计符合EPAPS-11的要求（采样流速偏差30%时进行等速采样）•TEOMoffersinternalmassreferencingTEOM提供了内部质量参比•TruemassconcentrationtraceabletoNIST-standards真正可溯源NIST标准的质量浓度4什么是等速抽取采样？•在干烟气环境下要想采到具有代表性的颗粒物样品，就需使混有颗粒物的烟气在被抽进采样嘴时的速度与烟囱或烟道中的烟气流速尽量接近。如果这两个速度完全一样，就可被视为等速采样。美国环保局EPA制定的参考方法5实际上就是关于做等速采样的详细步骤和操作要求。5什么是等速抽取采样？6PS-11（PerformanceSpecification11）相关测试•如果你所使用的测尘仪是外抽取式的，并且所监测污染源的体积流量变化范围超过了正常值得10%以上时，则你所使用的测尘仪就应具有等速采样功能。如果你所使用的外抽取式测尘仪不具有等速采样功能，你就必须以该监测点位的实际具体数据为准，或是经国家或当地权威部门以安装在该点位上的其他设备所得出的数据为准，来对你的测尘仪所出的数据进行验证合格后，也可以不进行等速采样。•用在每次PS-11相关测试中收集到的数据作为“实际点位的具体数据”如果PS-11相关测试所得到的数据与被评价测尘仪所得出的数据相吻合，则可认定该测尘仪是合格的。7Strengths优点•Continuouslymonitorsfilterableparticulatematter连续测量可过滤颗粒物•Unaffectedbychangesinparticulatecharacteristics不受颗粒物特性的影响•Builtforwetscrubberapplications按湿式污染物去除器应用设计•DirectMassmeasurementusingTEOMinternalmassreferencing使用TEOM内部质量参比直接测量质量•TruemassconcentrationtraceabletoNIST-standards真正可溯源至NIST标准的质量浓度•ASTMreferencemethodforstackparticulatesASTM烟道颗粒物测量的标准方法Weakness缺点•Expensive$90K昂贵•Notyettestedindryscrubber未在干式污染物去除器后测试•TEOM-recommendedannualfactoryrecertification建议每年工厂重新认证ThermoScientificDualMethodPMCEMS双测量平台的颗粒物CEMS8•DualMethodPMCEMScombinesdesirablefeaturesfromparenttechnologies:双测量平台的颗粒物CEMS结合了两种技术的优点•Inertialmicrobalance(TEOM)惯性微量振荡天平•Lightscattering光散射+=ThermoScientificDualMethodPMCEMS双测量平台的颗粒物CEMS9Strengths优点•Fastresponse响应速度快•Lowmaintenance低维护量•SensitivetolowPMconcentration•低浓度下灵敏Weakness缺点•Indirectmassmeasurement间接测量质量•MeasuressecondarypropertiesofPM测量颗粒物的间接特性•Affectedbyparticlesize,density,shape受颗粒大小、比重、形状的影响•MeasuresliquiddropsasPM将液滴作为颗粒物•Fastresponsebutnotaccurate响应速度快但准确度不好•Manualcalibrationrequired需要手动校准LightScattering光散射10DetectorSourceNephelometerLightScatteringPrinciple光散射原理111213141516171819InertialMicrobalance(OperatesPeriodically)微量震荡天平（需要时使用）•Real-timemassmeasurement实时测量•MasssensingtechnologytraceabletoaNISTstandard质量测量可溯源至NIST标准•Directrelationshipbetweenmassandfrequencychange质量与频率变化之间有直接的关系•Taperedelementoscillatesatitsnaturalfrequency锥形原件在它的自然频率下震荡•Frequencydecreaseswithaccumulationofmassonfilter滤膜上颗粒物质量增大时频率降低•Limiteddurationforsampling限制采样时长•ASTMD6831-02该方法使用的测量技术•EquivalenttoMethods5and17与Method5和17等效•RecentlyRenewed最近更新•Showntobeveryaccurate准确度高20ContinuousPMCEMS颗粒物CEMSHighAccuracy准确度高TEOM+NephelometerHighPrecision精度高PMCEMSHighAccuracyandHighPrecision高精度，高准确度兼有21TEOM-TaperedElementOscillatingMicrobalanceTEOM-锥形振荡微量天平•Taperedelementoscillatesatitsnaturalfrequency锥形原件在其自然频率下振荡•Particulatemattercollectsonfiltercontinuously颗粒物被连续采集在滤膜上•Frequencydecreaseswithaccumulationofmass累积质量导致频率变小•Directrelationshipbetweenmassandfrequencychange质量与频率变化有直接关系TaperedElement锥形原件ΔM(g)=changeinmass质量变化K0=springconstant(includingmassconversions)弹性常数（包括质量转化系数）f0=initialfrequency(Hz)初始频率f1=finalfrequency(Hz)最终频率2o21of1f1KΔM(g)22TEOM-TaperedElementOscillatingMicrobalanceTEOM-锥形振荡微量天平金湾电厂数据计算实列23FeaturesandKeyPointsofthePMCEMS•Measuresfilterableparticulate,inaccordancewithPS-11测量可过滤颗粒物，满足PS-11•Dualmethodcombineslightscatteringandinertialmicrobalance(Masstransducer)光散射和微振荡天平（质量传感器）结合的双测量平台•Methods5and17arethereferencemethodsusedforcomparison手工方法5和17是参比方法•Fielddemosperformingunderdifferentplantconditions在不同电厂条件下现场验证•Testedatmultipleplants在多个电厂测试24ProductDesign•ProbeMonitor探头•Sampleconditioning样品处理•Sampledelivery样品输送•Measurement测量•Massreference质量参比•ProbeController,Model3880i探头控制器，3880i型•Flowcontrol流量控制•Powerregulation电源管理•Datamanagement数据处理25PMCEMSProductDesign•Technology技术•ForwardLightscattering前散射•TEOMmassreferenceTEOM质量参比•MFCsandheatedzones质量流量控制器并加热•Platform平台•i-Series.(e.g.,MODBUS)•Differentiation区别•Internalmassreference内部质量参比•TraceabletoNIST-standards可溯源至NIST标准•Remotecalibrationcheck26ProbeMonitor探头AllmeasurementsadjustedfordilutionandpurgeflowsForwardlightscattering–continuous前散射-连续TEOM–periodicmassreferenceTEOM-阶段性质量参比3-waybypassvalve3通旁路阀27ProbeControllerModel3880i探头控制器3880i•ProbeController探头控制器•Flowcontrol气路控制•Powerregulation电源管理•Datamanagement数据管理•Analogoutputs模拟量输出•6voltageoutputs6路电压输出:0–100mV,1,5,10V(userselectable)•5%offull-scaleover/underrange(userselectable),•6currentoutputs6路电流输出:firmwareconfigured0-20mA,4-20mA•Digitaloutputs开关量输出:1powerfailrelay,10digitalrelays,userselectablealarmoutput,relaylogic,100mA@200VDC•Digitalinputs开关量输入:16TTLleveluserselectprogrammable•Serialports串口:RS-232orRS-485C-Link,MODBUS,&streaming•Ethernetconnection以太网:10MbsEthernetconnection•StaticordynamicTCP/IPaddressing28DiagramofPMCEMS3-waybypassvalve3通旁路阀NephelometerAssembly光散射组件TEOMNozzle采样嘴DilutionAssembly稀释组件HeatedBenchAssembly加热室Motherboard主板Transformer变压器24VDCPowerSupplyMFCBypassMFCSampl