180吨天电镀污泥干化及熔炼处理工艺设计最终版

设计总说明电镀污泥中的铜、镍、银等重金属氢氧化物不稳定，随意堆放时在雨水的淋溶作用会渗漏到土壤中污染环境，并通过生物链危害人类健康。但电镀污泥中所含的重金属都是不可再生资源，不对其进行回收意味着重大的浪费。本设计要求处理180吨/天的电镀污泥，原污泥为经过脱水处理的含水率约75%的湿污泥。针对电镀污泥的特点和废物资源化利用的要求，结合国内处理电镀污泥的成功经验，决定选用先干化后熔炼的处理工艺。虽然该工艺设备投资成本较高，但其对重金属回收率高，处理流程短，炉渣可回收利用，可实现资源的综合利用。设计基本工艺流程为：储泥室→回转烘干机→制砖机→熔炼炉→粗金属、炉渣、煤灰等回收。本设计所用的主要设备有回转烘干机、砌块成型机、密封式熔炼炉、脉冲布袋收尘器、脱硫塔、活性炭吸附塔等。设计工艺总投资为417.64万元。关键词：电镀污泥，干化，熔炼，重金属，回收DesignilluminateCopper,nickel,silverandothermetalhydroxidesinelectroplatingsludgeisnotstable,ifpiledupatrandomatleachingbytherain.itscanleakintothesoilandpollutetheenvironment,andharmhumanhealththroughthefoodchain.Buttheheavymetalsinelectroplatingsludgearenonrenewableresources,nottorecoverymeanshugewaste.Inthisdesign,projectsrequiredtotreat180tons/dayelectroplatingsludge.Moisturecontentoftheoriginalsludge，whichhasbeenpressedbytheframefilter，isapproximately75%.Aimingatthecharacteristicofelectroplatingsludge,andinthelightofthesuccessfulexperienceofexternaltreatmentofelectroplatingandmaturetechnologyofinternaltreatmentofthat,weselectdryingandsmelttechnology.Althoughthisprocessequipmentinvestmentcostmuch,butithavethehighrecoveryrateoftheheavymetal,theshortprocess,andtheslagcanbeRecyclable.Basicprocessis:Storedmudroom→Rotarydryer→brickmachine→smelt→Ashandotherrecycled.ThemainequipmentusedinthedesignisRotaryDryer,smelter,blockmakingmachine,Pulsebagfilter,desulfurizationtower,activatedcarbonadsorptiontowerandsoon.Thetotalinvestmentis4176400yuan.Keywords：electroplatingsludge,mummification,smelt,heavymetal,recycle目录1、概述......................................................................................................................................11.1设计名称......................................................................................................................11.2设计要求......................................................................................................................11.3处理处置的一般要求..................................................................................................11.4项目意义......................................................................................................................22、设计背景..............................................................................................................................32.1电镀污泥的特点..........................................................................................................32.2电镀污泥处理处置现状..............................................................................................32.3电镀污泥处理与处置方法..........................................................................................42.3.1固化剂固化.......................................................................................................42.3.2填埋...................................................................................................................52.3.3焚烧热处理.......................................................................................................52.4电镀重金属污泥的资源化综合利用..........................................................................52.5.1回收重金属.......................................................................................................62.5.2生产改性塑料制品...........................................................................................83、设计范围、依据及原则......................................................................................................93.1设计范围......................................................................................................................93.2设计依据......................................................................................................................93.2.1国家法律、法规及政策...................................................................................93.2.2地方法规及政策.............................................................................................103.2.3技术规范和行业标准.....................................................................................103.3设计原则....................................................................................................................114、设计内容............................................................................................................................124.1工艺流程及说明........................................................................................................124.2干化工艺....................................................................................................................144.2.1干化过程.........................................................................................................144.2.3加热方式.........................................................................................................144.2.4污泥干化的热源.............................................................................................154.2.6干化设备.........................................................................................................164.2.7选型计算.........................................................................................................164.