毕业设计--再生纸废水处理

-1-摘要针对传统的再生纸废水处理方法一次性投资高、管理难度大、处理效果不理想的问题，本研究将超声波技术与催化内电解工艺相结合，并用于实际再生纸废水的降解预处理。通过对废水COD和色度去除率两项实验指标的考察，探讨了铁-沸石比、铁-铜比、初始pH值、反应时间、超声功率等因素水平对超声-催化内电解耦合反应的影响。同时还进行了超声强化催化内电解法与单独催化内电解法处理再生纸废水的对比实验，最后在已得出的最佳影响条件下，进行该耦合体系的循环小试试验，讨论了该试验方案的可行性。研究结果表明，超声-催化内电解法能够达到并优于单独催化内电解法对再生纸废水的处理效果。各因素对超声-催化内电解耦合反应的影响按大小次序来说是反应时间初始pH值铁-铜质量比超声功率铁-沸石质量比。最佳反应条件为铁-铜-沸石比3:1:1、初始pH值4.0、超声功率200W、曝气量为0.4L/min、反应时间90mins。在最佳反应条件下COD去除率达到64%以上，色度去除率达74%以上。循环小试试验确定超声-催化内电解出水的最佳回流比为50%，经两次循环后，不同反应时间下废水的COD去除率都稳定在52%~63%，色度去除率最高可达92%。实验证明，超声协同催化内电解法处理再生纸废水具有可行性。该耦合工艺的设备结构简单、能耗低、操作简便，应用潜力巨大，市场前景十分广阔。关键词：超声，催化内电解，再生纸废水-2-ABSTRACTDuetotheproblemoftheconventionalmethodofrecycledpaper-makingwastewatertreatmentwithhighone-timeinvestment,difficultmanagementandunsatisfactoryresults,thestudycombinesultrasonictechnologywithcatalyzedinternalelectrolysistechnologyandusesthecombinationaspretreatmenttodegradetheactuallyrecycledpaper-makingwastewater.ThroughinspectingthetwoindicatorsofCODremovalandcolorremoval,theimpactoffactorsandlevelssuchasiron-zeoliteproportion,iron-copperproportion,initialpH,reactiontime,ultrasonicpowerontheus-catalyzedinternalelectrolysiscoupledreactionisinvestigated.Meanwhile,thecomparativeexperimentsbetweenus-catalyzedinternalelectrolysisandindividuallycatalyzedinternalelectrolysisarealsotested.Finally,wediscussthefeasibilityoftheprogrambyconductingcirculationpilottestundertheoptimumconditions.Theresultsshowedthatthetreatmenteffectofus-catalyzedinternalelectrolysiscanachieveevenbesuperiortothatofindividuallycatalyzedinternalelectrolysis.Theimpactofvariousfactorsonthecoupledreactionaccordingtotheorderisthereactiontime,initialpH,theratioofirontocopper,ultrasonicpowerandtheratioofirontozeolite.Theoptimumconditionfortheratioofiron-copper-zeoliteis3:1:1;fortheinitialpHis4.0;forultrasonicpoweris200W;foraerationcapacityis0.4L/minandforthereactiontimeis90mins.UndertheoptimumconditionsCODremovalrateisabove64%andcolorremovalrateisabove74%.Thebestrefluentratioofthecirculationis50%.Aftertwicerecycles,theCODremovalratesunderdifferentreactiontimesareallstableat52%~63%,whilethehighestcolorremovalrateisupto92%.Theexperimentsshowthatthetechnologythatcatalyzedinternalelectrolysisiscoordinatedbyultrasoundisfeasible.Thecoupledprocesshastheadvantageofsimpleequipment,lowenergyconsumptionandsimpleoperation.Itsapplicationisgreatlypotential,andthemarketprospectsareverybroad.-3-KEYWORDS:ultrasound,catalyzedinternalelectrolysis,recycledpaper-makingwastewater.-4-目录摘要..............................................................-1-ABSTRACT...........................................................-2-前言..............................................................-6-第1章概述........................................................-7-1.1再生纸废水的处理技术现状.....................................-7-1.1.1再生纸废水的特性..........................................-7-1.1.2再生纸废水处理技术现状....................................-7-1.2催化铁内电解法...............................................-8-1.2.1催化铁内电解法处理废水的原理..............................-8-1.2.2催化铁内电解法污水处理技术的研究现状......................-9-1.2.3催化内电解法的影响因素....................................-9-1.3超声波降解废水的机理及其在废水处理中的应用..................-11-1.3.1超声波处理废水的原理.....................................-11-1.3.2超声波与其它技术的联用...................................-12-1.4研究背景、提出及研究内容....................................-13-1.4.1课题研究背景和提出.......................................-13-1.4.2课题的研究内容...........................................-14-1.4.3特色及创新...............................................-14-第2章实验设计与研究方法.........................................-15-2.1实验仪器和方法..............................................-15-2.1.1实验材料及仪器...........................................-15-2.1.2实验方法.................................................-15-2.2实验分析测试项目及分析方法..................................-18-2.2.1实验分析测试项目.........................................-18--5-2.2.2分析方法.................................................-18-第3章实验结果与讨论.............................................-20-3.1超声-催化内电解耦合联用处理再生纸废水的实验研究.............-20-3.1.1正交实验与结果讨论.......................................-20-3.1.2单因素影响实验...........................................-21-3.2超声-催化内电解法与单独催化内电解法处理效果对比.............-28-3.2.1超声-催化内电解法与单独催化内电解处理再生纸废水的实验....-28-3.2.2结果讨论.................................................-30-3.3超声-催化内电解法处理再生纸废水的循环小试试验...............-30-3.3.1超声-催化内电解循环试验流程的确定........................-30-3.3.2循环回流比的确定.........................................-31-3.3.3试验结果与讨论...........................................-32-3.4本章小结....................................................-33-第4章催化内电解反应器的设计.....................................-35-4.1催化内电解反应装置模型的建立................................-35-4.2催化内电解反应器各参数的设计计算............................-35-4.3反应区筒体..................................................-36-4.4反应器配水、配气及排水......................................-36-4.5反应器总装图.................................................-37-结论与建议........................................................-38-附录1实验数据................................