燃煤烟气脱硫废水零排放工艺的探讨摘要燃煤火力发烟器会产生大量的脱硫废水，而脱硫废水有成分比较复杂，具有一定的腐蚀性，结垢性比较强，废水中盐的含量极高等缺点，笔者将根据它的这些缺点对国内外的处理现状进行简介。同时将“预处理+机械蒸发+膜浓缩+正渗透”、“预处理+多效蒸发结晶”、“预处理+烟气余热蒸发+膜浓缩”等三项等能够实现脱硫废水零排放的技术进行对比，以明了它们的优缺点。就目前情况来看，能够实现脱硫废水零排放的技术在国内应用的并不普遍，而且其投资和运行的费用都特别高。所以为了提高企业的形象，体现科学发展观的理念，企业应当从自我出发，在充分考虑自身实际情况的基础上，对多种脱硫废水零排放技术进行对比，以找出最适合的技术，并对结晶盐和污泥进行妥善处理。关键词：燃煤烟气；脱硫废水；零排放AbstractAimingatthecharacteristicsofhighsaltcontent,complexcomposition,corrosivenessandfoulingofdesulfurizationwastewaterincoal-firedpowerplants,thedomestictreatmentstatusisintroduced,andthe“pretreatment+multi-effectevaporationcrystallization”forachievingzerodischargeofdesulfurizationwastewateriscompared.Advantagesanddisadvantagesofthreetechnologies:pretreatment+membraneconcentration+forwardosmosis+mechanicalevaporation"and"pretreatment+membraneconcentration+fluegaswasteheatevaporation".Atpresent,therearefewerdomesticapplicationsandhigherinvestmentandoperatingcosts.Totrulyrealizethezerodischargeofdesulfurizationwastewater,itisnecessarytocomprehensivelyconsideritsownactualsituation,anditisnecessarytocarryoutmulti-partycomparison,adoptappropriatetechnology,andproperlydisposeofsludgeandcrystallinesalttoavoidthetransferofpollution,therebyestablishingagreenandenvironmentally-friendlycorporateimage.Keywords:coal-firedfluegas;desulfurizationwastewater;zeroemission目录第一章引言............................................................................................................11.1研究背景....................................................................................................11.2研究意义....................................................................................................2第二章现有脱硫废水处理技术研究进展............................................................32.1脱硫废水的特点和性质............................................................................32.1.1系统需要排放C1-..........................................................................32.1.2系统需要排放灰分.........................................................................42.1.3系统需要排放惰性物质.................................................................42.2处理工艺....................................................................................................42.3回用方式....................................................................................................52.3.1用于水力除灰渣系统.....................................................................52.3.2用于煤场或灰场喷淋.....................................................................52.3.3用于干灰拌湿.................................................................................6第三章工艺过程....................................................................................................73.1.1预处理+多效蒸发结晶..................................................................73.1.2预处理+膜浓缩+正渗透+机械蒸发..............................................73.1.3预处理+膜浓缩+烟气余热蒸发............................
