聚(ju)丙烯(xi)(xi)酰胺(an)是污水(shui)(shui)處(chu)(chu)理藥劑(ji)(ji)(ji)絮(xu)(xu)凝劑(ji)(ji)(ji)的(de)一種(zhong)，屬于水(shui)(shui)溶性(xing)高分(fen)子(zi)聚(ju)合物(wu)，具有良(liang)好的(de)絮(xu)(xu)凝性(xing)。對于這類(lei)絮(xu)(xu)凝劑(ji)(ji)(ji)我們已經多(duo)次進行過分(fen)析，其(qi)類(lei)型多(duo)樣，我們污水(shui)(shui)處(chu)(chu)理藥劑(ji)(ji)(ji)廠家可(ke)以提供陽(yang)離(li)子(zi)聚(ju)丙烯(xi)(xi)酰胺(an)（CPAM）、陰(yin)離(li)子(zi)聚(ju)丙烯(xi)(xi)酰胺(an)（APAM）、非離(li)子(zi)聚(ju)丙烯(xi)(xi)酰胺(an)（NPAM)、兩(liang)性(xing)離(li)子(zi)聚(ju)丙烯(xi)(xi)酰胺(an)（ACPAM）。在不(bu)同的(de)條件下(xia)，聚(ju)丙烯(xi)(xi)酰胺(an)絮(xu)(xu)凝劑(ji)(ji)(ji)能實現(xian)相應(ying)的(de)絮(xu)(xu)凝、粘合、降(jiang)阻、增稠(chou)性(xing)能，污水(shui)(shui)中的(de)懸浮物(wu)質主要是通(tong)過沉淀(dian)去除，其(qi)沉淀(dian)流程(cheng)如(ru)下(xia)：

       所(suo)謂沉(chen)(chen)(chen)(chen)淀(dian)(dian)(dian)(dian)(dian)，就是污水(shui)(shui)處(chu)理絮(xu)凝(ning)劑(ji)在(zai)(zai)與污水(shui)(shui)進(jin)行反應時，生成(cheng)(cheng)了不(bu)溶于反應物(wu)所(suo)在(zai)(zai)溶液的物(wu)質，這是污水(shui)(shui)處(chu)理的重(zhong)要技(ji)術(shu)之一，重(zhong)力(li)作(zuo)用(yong)下自(zi)(zi)然會(hui)產生沉(chen)(chen)(chen)(chen)淀(dian)(dian)(dian)(dian)(dian)。根據懸(xuan)浮物(wu)質的性質、濃度及絮(xu)聚丙(bing)烯酰胺(an)性能(neng)，具體(ti)的沉(chen)(chen)(chen)(chen)淀(dian)(dian)(dian)(dian)(dian)可以分(fen)為(wei)：自(zi)(zi)然沉(chen)(chen)(chen)(chen)淀(dian)(dian)(dian)(dian)(dian)，絮(xu)凝(ning)沉(chen)(chen)(chen)(chen)淀(dian)(dian)(dian)(dian)(dian)，區(qu)域(yu)沉(chen)(chen)(chen)(chen)淀(dian)(dian)(dian)(dian)(dian)。在(zai)(zai)污水(shui)(shui)中懸(xuan)浮固(gu)體(ti)濃度不(bu)高且不(bu)具有凝(ning)聚的性能(neng)的情(qing)況下，投(tou)加聚丙(bing)烯酰胺(an)就會(hui)形成(cheng)(cheng)自(zi)(zi)然沉(chen)(chen)(chen)(chen)淀(dian)(dian)(dian)(dian)(dian)，沉(chen)(chen)(chen)(chen)淀(dian)(dian)(dian)(dian)(dian)過程懸(xuan)浮固(gu)體(ti)之間互不(bu)干擾，不(bu)改變(bian)形狀、不(bu)互相粘(zhan)合，顆(ke)(ke)粒(li)各自(zi)(zi)單獨進(jin)行沉(chen)(chen)(chen)(chen)淀(dian)(dian)(dian)(dian)(dian)且沉(chen)(chen)(chen)(chen)淀(dian)(dian)(dian)(dian)(dian)軌跡(ji)呈直(zhi)線。另一種是區(qu)域(yu)沉(chen)(chen)(chen)(chen)淀(dian)(dian)(dian)(dian)(dian)，在(zai)(zai)懸(xuan)浮顆(ke)(ke)泣濃度在(zai)(zai)5000mg/L以上(shang)時，顆(ke)(ke)粒(li)的沉(chen)(chen)(chen)(chen)降受到周(zhou)圍(wei)其它顆(ke)(ke)粒(li)影響，顆(ke)(ke)粒(li)間相對位置保持不(bu)變(bian)，形成(cheng)(cheng)一個整體(ti)共同下沉(chen)(chen)(chen)(chen)，與澄清水(shui)(shui)之間有清晰的泥水(shui)(shui)界面。

       最后(hou)(hou)就是污(wu)水處理藥劑投加時(shi)的絮(xu)(xu)(xu)凝沉(chen)淀(dian)過(guo)程，在(zai)污(wu)水中投加聚丙(bing)烯酰胺藥劑后(hou)(hou)，懸(xuan)浮物的膠體(ti)及分散顆粒在(zai)分子力(li)的相(xiang)互作用下(xia)生成絮(xu)(xu)(xu)狀體(ti)，且在(zai)沉(chen)降過(guo)程中互相(xiang)碰撞凝聚，其尺寸和質量不(bu)斷變大，沉(chen)速不(bu)斷增加。在(zai)這(zhe)種應用模式下(xia)，絮(xu)(xu)(xu)凝效果(guo)與被絮(xu)(xu)(xu)凝物種類(lei)、粘(zhan)度、濁度及懸(xuan)浮液(ye)的PH值有關，使用也(ye)要看污(wu)泥特性，實際投加后(hou)(hou)注(zhu)意絮(xu)(xu)(xu)團的大小及強度。