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油田的注水采油中，把含水油分离出来的水叫油田采出水，这种水，水温高、含各种有机物、高矿化、微生物多并有大量的结垢离子；这种水要循环再利用必然要经过自然去油、混凝沉降、过滤等处理法，再供给热采锅炉给水处。在经过混凝沉降的处理时一般会用到絮凝剂。促进水质澄清，快速沉降污泥，减少泥渣；强烈吸附水中的胶体微粒，卷带、粘附，使胶体凝聚，形成絮状混凝沉淀。聚硅酸硫酸铁絮凝剂用在油田的比较多；专家通试验；将金属离子引入硅酸中发现，高度聚合的硅酸与金属离子一起，可以产生良好的混凝效果。聚硅酸絮凝剂对油田采出的水有更强的除油能力。
这种含硅酸的絮凝剂遇热与钙镁离子混合在一起，会吸附在热采锅炉给水处的管壁上，形成了这种硅酸盐水垢，油田采出水杂物较多，使用的硅酸絮凝剂较多，形成的硅酸盐水垢就会占的比例多；这就是在热采锅炉上切管测试中，水垢中的硅酸盐水垢高达35%的原因。海扬磁水商务部0536-8970809
