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油田的注水采油中，把含水油分離出來的水叫油田采出水，這種水，水溫高、含各種有機(jī)物、高礦化、微生物多并有大量的結(jié)垢離子；這種水要循環(huán)再利用必然要經(jīng)過自然去油、混凝沉降、過濾等處理法，再供給熱采鍋爐給水處。在經(jīng)過混凝沉降的處理時(shí)一般會(huì)用到絮凝劑。促進(jìn)水質(zhì)澄清，快速沉降污泥，減少泥渣；強(qiáng)烈吸附水中的膠體微粒，卷帶、粘附，使膠體凝聚，形成絮狀混凝沉淀。聚硅酸硫酸鐵絮凝劑用在油田的比較多；專家通試驗(yàn)；將金屬離子引入硅酸中發(fā)現(xiàn)，高度聚合的硅酸與金屬離子一起，可以產(chǎn)生良好的混凝效果。聚硅酸絮凝劑對(duì)油田采出的水有更強(qiáng)的除油能力。

這種含硅酸的絮凝劑遇熱與鈣鎂離子混合在一起，會(huì)吸附在熱采鍋爐給水處的管壁上，形成了這種硅酸鹽水垢，油田采出水雜物較多，使用的硅酸絮凝劑較多，形成的硅酸鹽水垢就會(huì)占的比例多；這就是在熱采鍋爐上切管測試中，水垢中的硅酸鹽水垢高達(dá)35%的原因。海揚(yáng)磁水商務(wù)部0536-8970809