清洁火电厂汞排放规律及控制方法分析VIP免费

毕业设计(论文)题目：清洁火电厂汞排放规律及控制方法分析院系动力工程系专业班级热能与动力工程专业09k1班学生姓名赵丹阳指导教师高鹏二○一三年六月清洁火电厂汞排放规律及控制方法分析摘要燃煤电站汞污染已经成为继SO2污染之后的又一重大污染问题。燃煤烟气中汞污染的控制研究是目前重要的环保课题之一。火电厂烟气汞污染已受到高度重视，开发高效、低成本、无二次污染的烟气脱汞技术已成为研究的重点，建设更加清洁环保的火电厂已成为趋势。国内外对燃煤电站汞在烟气中的形态分布已经有很多研究，但就汞形态和转化机理方面还处于探索阶段，烟气的组分，温度，飞灰都会对汞的转化处理产生影响。本文主要介绍了燃煤烟气中重金属汞的排放、形态转化及分布情况，着重论述了燃煤烟气中汞的排放规律和控制方法，并做了相应的分析与总结。本文采用飞灰改性，并在飞灰中加入壳聚糖吸附剂，并研究它的除汞效率。同时也对未来燃煤烟气汞污染控制技术做了新的展望。关键词：清洁火电厂；汞；飞灰；改性；壳聚糖THEMERCURYEMISSIONLAWANALYSISANDCONTROLMETHODSOFCLEANCOAL-FIREDPOWERPLANTAbstractCoal-firedpowerplantmercurypollutionhasbecometheSO2pollutionwasanothermajorpollutionproblems.Coal-firedfluegasmercurycontrolresearchisoneoftheimportantenvironmentalissues.Thermalpowerplantfluegasmercurypollutionhasbeenattachedgreatimportancetothedevelopmentofefficient,low-cost,nosecondarypollutionfluegasmercuryremovaltechnologyhasbecomethefocusofthestudy,theconstructionofcleanerandmoreenvironmentallyfriendlythermalpowerplantshasbecomeatrend.Coal-firedpowerplantsathomeandabroadintheformofmercuryinthefluegasdistributionhasbeenalotofresearch,butonthemechanismofmercuryspeciesandtransformationisstillintheexploratorystage.Thefluegascomposition,temperature,conversionofflyashwillbehandledontheimpactofmercury.Heavymetalsmercuryemissionsincoal-firedfluegastoformtransformationanddistribution,focusesoncoal-firedfluegasmercuryemissionsrulesandcontrolmethods,andresponseanalysisandsummaryoffuturecoal-firedfluegasmercurypollutioncontroltechnologytodoanewoutlook.Atpresent,weshalladdthechitosanintothemodifiedflyashandstudyitsadsorptionefficiency.Keywords:cleancoal-firedpowerplants;mercury;fluegas;modification;chitosan目录摘要................................................................................................................................................IABSTRACT....................................................................................................................................II1绪论...........................................................................................................................................11.1研究火电厂汞排放规律的意义..............................................................................................11.2国内外研究现状......................................................................................................................11.3汞的形态及特点......................................................................................................................21.4燃煤电厂烟气脱汞概述..........................................................................................................21.5本文主要内容及研究方法......................................................................................................52汞的监测方法及排放规律.........................................................................................................62.1常用的汞的监测方法....................................................