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新聞資訊</span></span></p> </div></div></div> </div> </div></div><div class="pg2hw3v" id="w_grid-1555993977573" class="w_grid-000"><div id="urkyhgk" class="w_grid signal"> <div id="uvp3bz8" class="e_box e_box-000 p_gridbox"> <div class="b8qzo7c" id="content_box-1555993977573-0" class="e_box e_box-000 d_gridCell_0 p_gridCell"><div class="ryhgkir" id="c_portalResNews_detail-15559941294952390" class="c_portalResNews_detail-01001">  <div id="zvzoimr" class="newsBox p_NewsDetail" data-infoid="8">  <h1 class="newsTitle">水處理藥劑全面總結瀏覽次數 </h1>  <div id="8d33xwa" class="newsTime">2019-11-21 08:57 </div>  <div id="jaosgfz" class="newsarticles" data-ename="資訊詳細描述"><div id="wixgp8n" class='reset_style js-reset_style js-adapMobile '><p style="margin-top:0em;margin-bottom:0em;TEXT-INDENT:0em;LETTER-SPACING:0em;LINE-HEIGHT:2em;"> <span style="font-size:16px;"><span style="font-family:微軟雅黑體,tahoma,arial,sans-serif;"> 廢水處理中常用藥劑的種類(lèi)有哪些？</span></span></p> <p style="margin-top:0em;margin-bottom:0em;TEXT-INDENT:0em;LETTER-SPACING:0em;LINE-HEIGHT:2em;"> </p> <p style="margin-top:0em;margin-bottom:0em;TEXT-INDENT:0em;LETTER-SPACING:0em;LINE-HEIGHT:2em;"> <span style="font-size:16px;"><span style="font-family:微軟雅黑體,tahoma,arial,sans-serif;"> 為了使廢水處理后達標排放或進(jìn)行回用，在處理過(guò)程需要使用多種化學(xué)藥劑。根據用途的不同，可以將這些藥劑分成以下幾類(lèi)：</span></span></p> <p style="margin-top:0em;margin-bottom:0em;TEXT-INDENT:0em;LETTER-SPACING:0em;LINE-HEIGHT:2em;"> </p> <p style="margin-top:0em;margin-bottom:0em;TEXT-INDENT:0em;LETTER-SPACING:0em;LINE-HEIGHT:2em;"> <span style="font-size:16px;"><span style="font-family:微軟雅黑體,tahoma,arial,sans-serif;"> ⑴絮凝劑：有時(shí)又稱(chēng)為混凝劑，可作為強化固液分離的手段，用于初沉池、二沉池、浮選池及三級處理或深度處理等工藝環(huán)節。</span></span></p> <p style="margin-top:0em;margin-bottom:0em;TEXT-INDENT:0em;LETTER-SPACING:0em;LINE-HEIGHT:2em;"> </p> <p style="margin-top:0em;margin-bottom:0em;TEXT-INDENT:0em;LETTER-SPACING:0em;LINE-HEIGHT:2em;"> <span style="font-size:16px;"><span style="font-family:微軟雅黑體,tahoma,arial,sans-serif;"> ⑵助凝劑：輔助絮凝劑發(fā)揮作用，加強混凝效果。</span></span></p> <p style="margin-top:0em;margin-bottom:0em;TEXT-INDENT:0em;LETTER-SPACING:0em;LINE-HEIGHT:2em;"> </p> <p style="margin-top:0em;margin-bottom:0em;TEXT-INDENT:0em;LETTER-SPACING:0em;LINE-HEIGHT:2em;"> <span style="font-size:16px;"><span style="font-family:微軟雅黑體,tahoma,arial,sans-serif;"> ⑶調理劑：又稱(chēng)為脫水劑，用于對脫水前剩余污泥的調理，其品種包括上述的部分絮凝劑和助凝劑。</span></span></p> <p style="margin-top:0em;margin-bottom:0em;TEXT-INDENT:0em;LETTER-SPACING:0em;LINE-HEIGHT:2em;"> </p> <p style="margin-top:0em;margin-bottom:0em;TEXT-INDENT:0em;LETTER-SPACING:0em;LINE-HEIGHT:2em;"> <span style="font-size:16px;"><span style="font-family:微軟雅黑體,tahoma,arial,sans-serif;"> ⑷破乳劑：有時(shí)也稱(chēng)脫穩劑，主要用于對含有乳化油的含油廢水氣浮前的預處理，其品種包括上述的部分絮凝劑和助凝劑</span></span></p> <p style="margin-top:0em;margin-bottom:0em;TEXT-INDENT:0em;LETTER-SPACING:0em;LINE-HEIGHT:2em;"> </p> <p style="margin-top:0em;margin-bottom:0em;TEXT-INDENT:0em;LETTER-SPACING:0em;LINE-HEIGHT:2em;"> <span style="font-size:16px;"><span style="font-family:微軟雅黑體,tahoma,arial,sans-serif;"> ⑸消泡劑：主要用于消除曝氣或攪拌過(guò)程中出現的大量泡沫。</span></span></p> <p style="margin-top:0em;margin-bottom:0em;TEXT-INDENT:0em;LETTER-SPACING:0em;LINE-HEIGHT:2em;"> </p> <p style="margin-top:0em;margin-bottom:0em;TEXT-INDENT:0em;LETTER-SPACING:0em;LINE-HEIGHT:2em;"> <span style="font-size:16px;"><span style="font-family:微軟雅黑體,tahoma,arial,sans-serif;"> ⑹pH調整劑：用于將酸性廢水和堿性廢水的pH值調整為中性。</span></span></p> <p style="margin-top:0em;margin-bottom:0em;TEXT-INDENT:0em;LETTER-SPACING:0em;LINE-HEIGHT:2em;"> </p> <p style="margin-top:0em;margin-bottom:0em;TEXT-INDENT:0em;LETTER-SPACING:0em;LINE-HEIGHT:2em;"> <span style="font-size:16px;"><span style="font-family:微軟雅黑體,tahoma,arial,sans-serif;"> ⑺氧化還原劑：用于含有氧化性物質(zhì)或還原性物質(zhì)的工業(yè)廢水的處理。</span></span></p> <p style="margin-top:0em;margin-bottom:0em;TEXT-INDENT:0em;LETTER-SPACING:0em;LINE-HEIGHT:2em;"> </p> <p style="margin-top:0em;margin-bottom:0em;TEXT-INDENT:0em;LETTER-SPACING:0em;LINE-HEIGHT:2em;"> <span style="font-size:16px;"><span style="font-family:微軟雅黑體,tahoma,arial,sans-serif;"> ⑻消毒劑：用于在廢水處理后排放或回用前的消毒處理</span></span></p> <p style="margin-top:0em;margin-bottom:0em;TEXT-INDENT:0em;LETTER-SPACING:0em;LINE-HEIGHT:2em;"> </p> <p style="margin-top:0em;margin-bottom:0em;TEXT-INDENT:0em;LETTER-SPACING:0em;LINE-HEIGHT:2em;"> <span style="font-size:16px;"><span style="font-family:微軟雅黑體,tahoma,arial,sans-serif;"> 聚合氯化鋁的特點(diǎn)有哪些？</span></span></p> <p style="margin-top:0em;margin-bottom:0em;TEXT-INDENT:0em;LETTER-SPACING:0em;LINE-HEIGHT:2em;"> </p> <p style="margin-top:0em;margin-bottom:0em;TEXT-INDENT:0em;LETTER-SPACING:0em;LINE-HEIGHT:2em;"> <span style="font-size:16px;"><span style="font-family:微軟雅黑體,tahoma,arial,sans-serif;"> 聚合氯化鋁(PAC)，又稱(chēng)堿式氯化鋁，化學(xué)式為ALn(OH)mCL3n-m。PAC是一種多價(jià)電解質(zhì)，能顯著(zhù)地降低水中粘土類(lèi)雜質(zhì)(多帶負電荷)的膠體電荷。由于相對分子質(zhì)量大，吸附能力強，形成的絮凝體較大，絮凝沉淀性能優(yōu)于其他絮凝劑。</span></span></p> <p style="margin-top:0em;margin-bottom:0em;TEXT-INDENT:0em;LETTER-SPACING:0em;LINE-HEIGHT:2em;"> </p> <p style="margin-top:0em;margin-bottom:0em;TEXT-INDENT:0em;LETTER-SPACING:0em;LINE-HEIGHT:2em;"> <span style="font-size:16px;"><span style="font-family:微軟雅黑體,tahoma,arial,sans-serif;"> PAC聚合度較高，投加后快速攪拌，可以大大縮短絮凝體形成時(shí)間。PAC受水溫影響較小，低水溫時(shí)使用效果也很好。它對水的pH值降低較少，適用的pH范圍寬(可在pH=5～9范圍內使用)，故可不投加堿劑。PAC的投加量少，產(chǎn)泥量也少，且使用、管理、操作都較方便，對設備、管道等腐蝕性也小。因此，PAC在水處理領(lǐng)域有逐步替代硫酸鋁的趨勢，其缺點(diǎn)是價(jià)格較高。</span></span></p> <p style="margin-top:0em;margin-bottom:0em;TEXT-INDENT:0em;LETTER-SPACING:0em;LINE-HEIGHT:2em;"> <span style="font-size:16px;"><span style="font-family:微軟雅黑體,tahoma,arial,sans-serif;"> 另外，從溶液化學(xué)的角度看，PAC是鋁鹽水解—聚合—沉淀反應過(guò)程的動(dòng)力學(xué)中間產(chǎn)物，熱力學(xué)上是不穩定的，一般液體PAC產(chǎn)品均應在半年內使用。添加某些無(wú)機鹽（如CaCl2、MnCl2等）或高分子（如聚乙烯醇、聚丙烯酰胺等）可提高PAC的穩定性，同時(shí)可增加凝聚能力。從生產(chǎn)工藝講，在PAC的制造過(guò)程中引入一種或幾種不同的陰離子（如SO42-、PO43-等），利用增聚作用可以在一定程度上改變聚合物的結構和形態(tài)分布，進(jìn)而提高PAC的穩定性和功效；如果在PAC的制造過(guò)程中引入其它陽(yáng)離子組分，如Fe3+，使Al3+和Fe3+交錯水解聚合，可制得復合絮凝劑聚合鋁鐵。</span></span></p> <p style="margin-top:0em;margin-bottom:0em;TEXT-INDENT:0em;LETTER-SPACING:0em;LINE-HEIGHT:2em;"> <span style="font-size:16px;"><span style="font-family:微軟雅黑體,tahoma,arial,sans-serif;">三氧化二鋁含量是聚合氯化鋁有效成分的衡量指標，一般而言，絮凝劑產(chǎn)品密度越大，三氧化二鋁含量越高。一般來(lái)說(shuō)，堿化度越高的聚合氯化鋁吸附架橋能力越好，但因接近[Al(OH)3]n而易產(chǎn)生沉淀，因此穩定性也較差。</span></span></p> <p style="margin-top:0em;margin-bottom:0em;TEXT-INDENT:0em;LETTER-SPACING:0em;LINE-HEIGHT:2em;"> </p> <p style="margin-top:0em;margin-bottom:0em;TEXT-INDENT:0em;LETTER-SPACING:0em;LINE-HEIGHT:2em;"> </p> <p style="margin-top:0em;margin-bottom:0em;TEXT-INDENT:0em;LETTER-SPACING:0em;LINE-HEIGHT:2em;"> <span style="font-size:16px;"><span style="font-family:微軟雅黑體,tahoma,arial,sans-serif;"> 聚丙烯酰胺類(lèi)絮凝劑的特點(diǎn)有哪些？</span></span></p> <p style="margin-top:0em;margin-bottom:0em;TEXT-INDENT:0em;LETTER-SPACING:0em;LINE-HEIGHT:2em;"> </p> <p style="margin-top:0em;margin-bottom:0em;TEXT-INDENT:0em;LETTER-SPACING:0em;LINE-HEIGHT:2em;"> <span style="font-size:16px;"><span style="font-family:微軟雅黑體,tahoma,arial,sans-serif;"> 聚丙烯酰胺PAM是一種目前應用最廣泛的人工合成有機高分子絮凝劑，有時(shí)也被用作助凝劑。聚丙烯酰胺的生產(chǎn)原料是聚丙烯腈CH2＝CHCN，在一定條件下，丙烯腈水解生成丙烯酰胺，丙烯酰胺再通過(guò)懸浮聚合得到聚丙烯酰胺。聚丙烯酰胺屬于水溶性樹(shù)脂，產(chǎn)品有粒狀固體和一定濃度的粘稠水溶液兩種。</span></span></p> <p style="margin-top:0em;margin-bottom:0em;TEXT-INDENT:0em;LETTER-SPACING:0em;LINE-HEIGHT:2em;"> </p> <p style="margin-top:0em;margin-bottom:0em;TEXT-INDENT:0em;LETTER-SPACING:0em;LINE-HEIGHT:2em;"> <span style="font-size:16px;"><span style="font-family:微軟雅黑體,tahoma,arial,sans-serif;"> 聚丙烯酰胺在水的實(shí)際存在形態(tài)是無(wú)規線(xiàn)團，由于無(wú)規線(xiàn)團具有一定的粒徑尺寸，其表面又有一些酰胺基團，因此能夠起到相應的架橋和吸附能力，即具有一定的絮凝能力。但由于聚丙烯酰胺長(cháng)鏈卷曲成線(xiàn)團，使其架橋范圍較小，兩個(gè)酰胺基締結后，相當于作用相互抵消而喪失兩個(gè)吸附位，再加上部分酰胺基卷藏在線(xiàn)團結構的內部，不能與水中的雜質(zhì)顆粒相接觸和吸附，所以其擁有的吸附能力不能充分發(fā)揮。</span></span></p> <p style="margin-top:0em;margin-bottom:0em;TEXT-INDENT:0em;LETTER-SPACING:0em;LINE-HEIGHT:2em;"> <span style="font-size:16px;"><span style="font-family:微軟雅黑體,tahoma,arial,sans-serif;">為了使締結在一起的酰胺基再次分開(kāi)、內藏的酰胺基也能暴露在外表，人們設法將無(wú)規線(xiàn)團適當延伸展開(kāi)，甚至設法在長(cháng)分子鏈上增加一些帶有陽(yáng)離子或陰離子的基團，同時(shí)提高吸附架橋能力和電中和壓縮雙電層的作用。這樣一來(lái)，在PAM的基礎上又衍生出一系列性質(zhì)各異的聚丙烯酰胺類(lèi)絮凝劑或助凝劑。</span></span></p> <p style="margin-top:0em;margin-bottom:0em;TEXT-INDENT:0em;LETTER-SPACING:0em;LINE-HEIGHT:2em;"> </p> <p style="margin-top:0em;margin-bottom:0em;TEXT-INDENT:0em;LETTER-SPACING:0em;LINE-HEIGHT:2em;"> <span style="font-size:16px;"><span style="font-family:微軟雅黑體,tahoma,arial,sans-serif;"> 比如說(shuō)在聚丙烯酰胺溶液中加堿，使部分鏈節上的酰胺基轉化為羧酸鈉，而羧酸鈉在水中容易離解出鈉離子，使COO-基保留在支鏈上，因此生成部分水解的陰離子型聚丙烯酰胺。陰離子型聚丙烯酰胺分子結構上的COO-基使分子鏈帶有負電荷，彼此相斥將原來(lái)締結在一起的酰胺基拉開(kāi)，促使分子鏈由線(xiàn)團狀逐漸伸展成長(cháng)鏈狀，從而使架橋范圍擴大、提高絮凝能力，作為助凝劑其優(yōu)勢表現得更為出色。陰離子型聚丙烯酰胺的使用效果與其“水解度”有關(guān)，“水解度”過(guò)小會(huì )導致混凝或助凝效果較差，“水解度”過(guò)大會(huì )增加制作成本。</span></span></p> </div> </div>  <div id="tavk3hg" class="e_box d_pcDom p_PrevAndNext " data-ename="上一篇、下一篇信息區"> <div id="yv8r2sw" class="e_box p_previewBox"> <span id="x73on8q" class="i_title"><span id="8esrgfo" class="i_pageUpTitle">上一個(gè)</span> </span> <a href="/news/9.html" data-ename="上一篇信息區"> <span id="jakymqk" class="p_PreviewTitle">碟管式反滲透處理垃圾滲濾液 </span> </a> </div>  <div id="uhqu28c" class="e_box p_nextBox"> <span id="8o3fynh" class="i_title">下一篇 </span> <a href="/news/10.html" data-ename="下一篇標題"> <span id="ieoym87" class="p_PreviewTitle">城市污水處理系統之產(chǎn)生過(guò)程 </span> </a> </div> </div>   <div id="heshmwk" class="e_box p_PrevAndNextMo p_PrevAndNext " data-ename="上一篇、下一篇信息區"> 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