小型電鍍廠廢水處理工程優(yōu)秀畢業(yè)設(shè)計(jì)完整版（含圖紙）

1、南華大學(xué)城市建設(shè)學(xué)院畢業(yè)設(shè)計(jì)第1頁(yè)共94頁(yè)摘要：要：電鍍是世界三大污染行業(yè)之一，隨著我國(guó)鄉(xiāng)鎮(zhèn)電鍍企業(yè)的迅速發(fā)展，我國(guó)的電鍍污染問(wèn)題日趨嚴(yán)重。本文首先闡述了我國(guó)電鍍廢水的污染現(xiàn)狀以及對(duì)人類產(chǎn)生的危害，在對(duì)化學(xué)處理、離子交換、電解法、生物處理等電鍍廢水處理方法的分析和比較后，結(jié)合鄉(xiāng)鎮(zhèn)電鍍企業(yè)要求工藝簡(jiǎn)單、成本低等特點(diǎn)，決定采用NaHSO4化學(xué)還原沉淀法處理該企業(yè)的含鉻、鋅廢水。本工藝是在pH=2.5時(shí)用NaHSO4溶液將Cr6還原為Cr3，

2、在用NaOH溶液調(diào)節(jié)pH=8后生成Cr(OH)3和Zn(OH)2沉淀，在添加絮凝劑PAC和PAM后生成的絮體在斜板沉淀池中沉淀，出水經(jīng)砂濾器過(guò)濾后可回用于砂濾器反沖洗水及各種溶液的配制，或者達(dá)標(biāo)排放，而污泥則統(tǒng)一交于專業(yè)的環(huán)保公司處理。在設(shè)計(jì)中采用了較為先進(jìn)的P測(cè)定儀、在線pH計(jì)和液位計(jì)實(shí)現(xiàn)反應(yīng)過(guò)程的自動(dòng)控制。通過(guò)設(shè)計(jì)計(jì)算確定了各構(gòu)筑物的尺寸以及設(shè)備的選型，并對(duì)設(shè)計(jì)和操作管理中的要求進(jìn)行了說(shuō)明，最后對(duì)電鍍廢水治理的前景進(jìn)行了展望。關(guān)鍵字

3、：關(guān)鍵字：電鍍廢水；Cr；Zn；化學(xué)還原沉淀法AbstractAbstract：Withthespeedydevelopmentoftheelectroplatingenterpriseintownsinourcountryelectroplatingindustry，asoneofthebiggestpollutionsinthewldcausesthepollutionmemeseverely.Inthispaperdescribe

4、sthepresentsituationoftheelectroplatingeffluentwaterpollutionthegreatharmitmakestothehumankindhasbeendescribed.Aftertheanalysesthecomparisonofdifferentwaysftreatmentofelectroplatingeffluentsuchaschemicaltreatmentprocess、

5、ionexchangeprocess、electrolyticmethodbiologicalprocessIdecidetoadopttheNaHSO4reductionprecipitationtotreatthewastewatercontainingCrZnfthecpationsconsideringthefeaturesofthetownelectroplatingcpations’demsofsimpletechnique

6、slowcostsetc.ThistechnologyistodeoxidizeCr6intoCr3byNaHSO4solutionatthePH=2.5thenadjustthePHto8withNaOHsolutiontomakeCr(OH)3Zn(OH)2sediment.Theflocculatingconstituent，fmedafteraddingtheflocculatingagentPACPAMcanbedeposit

7、edintheslopingplanksettlingtank.Thewaterleftafterfiltratingthroughasankfiltercanbe南華大學(xué)城市建設(shè)學(xué)院畢業(yè)設(shè)計(jì)第3頁(yè)共94頁(yè)目錄目錄引言引言1第1章電鍍廢水概論電鍍廢水概論21.1電鍍污染現(xiàn)狀..................................................21.2電鍍廢水的危害......................

8、..........................31.2.1含鉻廢水的危害............................................31.2.2含鋅廢水的危害.............................................41.3我國(guó)治理電鍍廢水的發(fā)展歷程....................................4第2章設(shè)計(jì)背景設(shè)計(jì)背景52.1項(xiàng)目概況和意義...

9、.............................................52.2設(shè)計(jì)條件......................................................52.3設(shè)計(jì)原則......................................................4第3章電鍍廢水處理方法比較電鍍廢水處理方法比較63.1化學(xué)處理法..................

10、..................................63.1.1含鉻廢水的處理............................................63.1.2含鋅廢水的處理............................................93.2離子交換處理法...............................................103.3電解法......

11、.................................................113.4生物法.......................................................123.4.1生物絮凝法...............................................123.4.2生物吸附法.....................................