波与机械搅拌耦合作用下锌灰吸收低浓度二氧化硫的研

基于超声波与机械搅拌耦合作用下锌灰吸收低浓度二氧化硫的研究Studyonabsorptionoflow-concentrationSO2withzincashbasedonthemethodofcouplingultrasonicwaveandmechanicalagitationi毕业设计（论文）任务书毕业设计（论文）题目：基于超声波与机械搅拌耦合作用下的锌灰吸收低浓度SO2的研究设计(论文)的基本内容：一、考察温度对二氧化硫气体吸收的影响；二、考察搅拌器转速对二氧化硫气体吸收的影响；三、考察锌灰液固比对二氧化硫气体吸收的影响；四、考察二氧化硫浓度与二氧化硫吸收的关系；五、考察超声波对锌灰矿浆化及二氧化硫吸收的影响。毕业设计（论文）专题部分：题目：设计或论文专题的基本内容：学生接受毕业设计（论文）题目日期第周指导教师签字：年月日ii基于超声波与机械搅拌耦合作用下锌灰吸收低浓度二氧化硫的研究摘要关于二氧化硫烟气的防治与处理方法，研究最多、进展较快的是烟气脱硫技术。在众多烟气脱硫技术中，脱硫剂的选择是核心问题。本论文针对传统烟气脱硫技术存在的废弃物堆存占地大、二次污染严重等问题，提出了采用以冶炼厂中锌灰废弃物作为烟气脱硫剂，处理低浓度SO2的新工艺，即首先将锌灰进行矿浆化处理，然后在机械搅拌和超声波耦合作用下对低浓度SO2烟气进行吸收脱硫处理，本论文系统研究了温度、液固比、搅拌转速、二氧化硫气体浓度以及超声波功率等因素对烟气脱硫效果的影响。得到了以下结论：（1）实验结果表明，氧化锌法吸收低浓度的SO2在技术上是可行的，能够实现SO2的达标排放，具有脱硫率高、操作控制方便等优点；（2）综合考虑二氧化硫吸收时间或出口浓度，氧化锌吸收低浓度SO2适宜的条件为：反应温度为25°C，液固比为50:1，搅拌转速为200rpm，浓度小有利于二氧化硫的吸收；（3）在超声波作用下，有利于锌灰矿浆化，在一定程度上促进了二氧化硫的吸收。利用锌灰矿浆可以有效吸收低浓度的SO2，实现低浓度SO2烟气脱硫的有效处理，同时有效地实现了锌灰中的ZnO的综合利用。本论文研究结果为以锌灰做烟气脱硫剂处理低浓度SO2的新工艺工业化应用，同时实现锌灰的综合利用提供了理论依据。关键词：锌灰，低浓度二氧化硫，超声波，脱硫iiiStudyonabsorptionoflow-concentrationSO2withzincashbasedonthebasisofcouplingultrasonicwaveandmechanicalagitationABSTRACTInpreventionandtreatmentofSO2,nowadaysFGDtechnologyisthemoststudiedanddevelopedrapidly.AmongvariousFGDtechnologies,thekeyischoiceofdesulfurizingagent.ThelargestackingareaandserioussecondarypollutionhaveconstrainedthedevelopmentandapplicationofthetraditionalFGDtechnologiestosomeextent.Therefore,thispaperproposestousezincashwhichasthewasteofthesmeltertoabsorbthelow-concentrationSO2.Theprocess,firstly,pulpsthezincash，andthenabsorblow-concentrationSO2withzincashbasedonthemethodofcouplingultrasonicwaveandmechanicalagitation.Thispaperstudiestheeffectsofzincashliquid-solidratio,temperature,speedofimpeller,gasconcentrationandultrasonicpoweronthegasdesulfurazition.Thefollowingconclusionsaredeveloped:(1)Theresultsshowthat,absorptionoflow-concentrationSO2withzincashistechnicallyfeasible,standarddischargecanbeachieved,andithasadvantagesofhighdesulfurazitionrateandeasycontrol.(2)ConsideringstandardexceedingtimeoroutletconcentrationofSO2,thesuitableconditionsareselectedasfollows:temperatureis25°C,zincashliquid-solidratiois50:1andspeedofimpelleris200rpm,lowgasconcentrationisconductivetotheabsorptionofSO2.(3)Ultrasonicwaveisbeneficialforpulpingzincash,andhaspromptedabsorptionofSO2tosomeextent.Usingzincashslurrycanabsorblow-concentrationSO2effectively,achieveeffectivegasdesulfurazitionoflow-concentrationSO2,andhavetheeffectiveimplementationofthecomprehensiveutilizationofZnOinzincash.Thispaperprovidesatheoreticalbasisfortheuseofzincashasdesulfurizingagenttodealivwithlow-concentrationinindustryandcomprehensiveutilizationofzincash.Keywords:zincash,lowconcentrationSO2,ultrasonicwave,desulfurization目录毕业设计（论文）任务书···························································i摘要····················································································iiABSTRACT················································································iii第1章绪论··········································································-1-1.1低浓度二氧化硫的危害与处理·················································-1-1.1.1低浓度二氧化硫的来源...........................................................................-1-1.1.2低浓度二氧化硫的危害...........................................................................-1-1.1.3低浓度二氧化硫的处理...........................................................................-4-1.2锌灰的研究现状······································································61.2.1锌灰的来源....................................................................................................61.2.2锌灰的利用...............................................................................................-7-1.3课题的提出············································································-9-1.4本文的主要研究内容·······························································-10-第2章实验原理与方法·······················································-10-2.1超声波吸收装置的设计····························································-11-2.1.1反应釜的设计.........................................................................................-11-2.1.2超声波简介.............................................................................................-13-2.1.3超声波发生器与换能器.....................................................................-15-2.2实验原理················································································-17-2.3实验方法················································································-18-2.3.1实验原料.................................................................................................-18-2.3.2实验流程.................................................................................................-18-2.3.4二氧化硫的吸收.....................................................................................-19-第3章矿浆化的实验研究···················································-21-3.1机械作用下的锌灰矿浆化·······················································-21-3.2机械与超声波耦合下的锌灰矿浆化·········································-22-第4章锌灰吸收低浓度二氧化硫的研究······