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language="javascript"></script></span></span><span>發表時間：2019-07-15 18:13</span> </div> </div> <div id="cntrBody"> <div> <span style="font-size:16px;"> 聚合氯化鋁鐵是一種新式的高效無機絮凝劑,它不只具有鋁鹽和鐵鹽混凝劑的長處,還具有沉降速度快、構成絮狀物體積大、習慣pH值規模廣等特色,且排水色度好于氯化鐵, 除濁作用和絮狀物沉降功能優于聚鋁選用羥基化聚合法制備了聚合氯化鋁鐵, 并以其為絮凝劑用于凈化黃河水之長處。濁度去掉率在PAFC用量為6mg/L時呈現最大值,去掉率到達9914%,此后濁度去掉率隨PAFC用量的添加而下降,在用量為50mg時到達最低,然后略有進步。這是因為當PAFC參加量小于6mg/L時,絮凝劑不能與黃河水中微粒充沛接觸,仍有有些未被絮凝,致使絮凝作用較差;同時,當PAFC參加量大于10mg/L后,因為鋁鐵離子帶有很多的正電荷,從而使顆粒外表也帶有正電荷,使得顆粒彼此碰撞變難,絮體間的架橋作用所必需的粒子外表吸附活性點被絮凝劑所包裹,吸附架橋作用變得困難,不易凝集,因此絮凝作用變差。本作業PAFC 參加量以6mg/L為好。</span></div> <div> <span style="font-size:16px;"> 水的PH值與堿度。水的PH值不同,鋁鹽與鐵鹽混凝劑的水解產物形態不一樣,混凝效果也各不相同。要求水中含有一定的堿性物質,,用以中和混凝劑在水解過程中產生的H ,如果堿度不足,水的PH值下降,,聚合氯化鋁的水解反應不完全,對混凝過程不利。　　</span></div> <div> <span style="font-size:16px;"> 水中雜質的性質、組成和濃度。若水中存在二價以上的正離子,對源水中帶負電荷的膠體微粒脫穩有利。雜質顆粒大小不一時,,有利于混凝,當微粒粒徑細小而均一時,混凝效果就較差,若雜質濃度過低（如低濁水）,不利于顆粒間發生碰撞而難以形成凝聚中心微粒。　　</span></div> <div> <span style="font-size:16px;"> 水質的影響　　高效聚合氯化鋁混凝劑的凝集機理與溶液的PH值有關,因而水的堿度是影響凝集的主要因素之一,懸浮顆粒含量對絮凝、凝集階段均有影響。使用吸附或電中和來完成凝集時,混凝劑的投加量于懸浮顆粒含量成正比。但當投加量過大時,將使膠體系統的電荷變號而出如今穩。　</span></div> <div> <span style="font-size:16px;"> 水力條件。在混凝過程中,水力條件對絮凝體的形成影響很大,整個混凝過程可分為兩個階段：藥劑的投加與混合階段、反應階段。這兩個階段均需要具備良好的水力條件給予配合。</span></div> <div> <span style="font-size:16px;"><a href="http://www.tipkulturu.com"><img alt="" src="/uploads/allimg/190715/1-1ZG51Q41I94.jpg" style="width: 750px; height: 499px;" /></a></span></div> <div> </div> <div> <span style="font-size:16px;"> 原生產廢水經機械格柵截留大塊飄浮物后,進入調節池均勻調節水質與水量,調節池設機械攪拌裝置,通過機械攪動使原水混合均質,阻止懸浮物沉淀,懸浮物隨水流入氣浮池。同時投加絮凝劑聚合氯化鋁(PAC)和聚丙烯酰胺(PAM),蛋白質為兩性電解質,其等電點約為pH4.0~5.5,淀粉廢水的pH值正好為蛋白質的等電點,因此淀粉廢水中的蛋白具有自動凝聚的趨勢,這種凝聚方式形成的絮粒很小,同時由于絮粒表面帶有相同電荷及水化層的影響,絮粒很不穩定。加入無機高分子凝聚劑聚合氯化鋁中和絮粒上的電荷,使絮粒易于靠近凝聚成較大的絮粒,加入有機高分子絮凝劑,可使絮粒之間通過吸附架橋作用形成較穩定的大絮團;無機凝聚劑主要是依靠中和粒子的電荷凝聚成絮粒,有機絮凝劑則主要依靠吸附架橋作用使絮粒凝聚成絮團,先加無機凝聚劑中和電荷,然后再加有機絮凝劑聚丙烯酰胺生成絮團,兩者聯合使用絮凝效果較好,而且可大大降低絮凝劑聚丙烯酰胺的用量。此工藝可回收淀粉廢水中的植物蛋白,同時廢水中CODcr以及SS都有顯著下降,減輕了后續處理工藝的負荷。</span></div> </div> <div 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