柴油动力机械设备尾气分析与净化.ppt

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1、Combustionby-products（大量有毒气体和可吸入柴油微粒）NOx(oxidesofnitrogen)CO(carbonmonoxide)HC(hydrocarbons)THC(totalhydrocarbons)NMHC(non-methanehydrocarbons)NMNEHC(non-methane,non-ethanehydrocarbons)VOCs(volatileorganiccompounds)CH2O(formaldehyde)SOx(oxidesofsulfur)PM(dieselparticulatematter)PM10(under1

2、0microns)PM2.5(under2.5microns)柴油机尾气的产生AirFuelCxHyH2O+CO2+N2+excessO2Q.什么是催化剂?A.催化剂是一种能促进和加速化学反应而本身在反应前后没有任何消耗的物质。催化剂基本知识催化剂作用效果对比图催化剂大大降低转化温度催化剂载体和载体表面CATALYST-Amaterialthatfacilitatesachemicalreactionbutisnotconsumedintheprocess载体蜂巢设计加表面涂层AmediumtowhichacatalystmaybeappliedThesurfaceofas

3、ubstrate/honeycombisusuallycoatedwithapreciousmetal(suchasRd,Pt,Pd镭、钯、铂合金)ThiscoatingisusedtopromotechemicalreactionsattemperaturespresentintheexhaustThetwomostcommonmaterialswhichacatalystmaybeappliedtoareeitherceramicormetallicDCLInternationalInc.上海杰凯环保科技有限公司柴油动力机械尾气净化产品介绍加拿大DCL国际中国总代理始终

4、致力于保护和改善我们呼吸环境DCLMissionStatement系列产品CatalystElements（DOC）PackagedCatalystandMufflerSystemsWall-FlowParticulateFilters（DPF）Flow-ThroughFilters（FTF）催化转换器载体结构图放大后珊瑚状涂层表面，增加载体表面积合金催化剂颗粒Substratechannelwalls直流低背压气流通道COO2Substrate(ceramicormetallic)Platinum（铂合金颗粒）氧化铝涂层Al2O3(increasessurfaceare

5、a)CO2废气在通道内净化原理蜂巢单元采用薄壁金属，真空镀铜加牢固钎焊结构，8000H免维护保证NickelbrazedFeCrAlfoilEasilyoptimizedforeachapplicationZeroriskofdamageduringtransportorinstallationLowestpackagingcostHighestmechanicalshockresistance金属载体与陶瓷载体相比的优点陶瓷载体LessexpensivetomanufactureandTakelongertoheatupandbeginfunctioningcompare

6、dtometallicsubstratesUnitsdonotbendorflexunderheavyvibration;insteaditbreaksorcracks专利保护金属载体®OffersbetterdurabilitythanceramicGenerallywillcreateaminimalbackpressureandwillhavethelongestoperatinglifeSomedesignsusespiralwindingofthefoiloralayeredfoil(“Lasagna”type)Brazeddesignofferssuperior

7、strengthandresistancetotelescopingCatalyticConverter开放式的直流通道StraightFlow-ThroughChannelsCatalyticConverter(ExhaustPurifier)GasFlowSubstrateCatalyticConverter低碳钢or不锈钢壳体Ceramicormetalmedia（陶瓷或金属介质）Flow-throughchannelsCatalystElementsSubstrateisclampedtotwoconesP