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id="13xxh9l" class="ly_NyNewsdetail"> <h1 class="NyNewsdetail_title">廢水*是什么？具體該怎么處理？</h1> <div id="nfrrdfr" class="NyNewsdetail_tips">更新時間：2021-07-21 點擊次數：718</div> <div id="zjnphj3" class="NyNewsdetail_con"> 　　什么是*？<a href="http://www.www-42444.com/Products-21289561.html" target="_blank"><strong>廢水零排</strong><strong>放</strong></a>作為當下環保圈最時髦的詞匯，不僅席卷了整個環保圈，也成為環保從業者的理想。它主要是指工業廢水經過重復使用后，將這部分含鹽量和污染物高濃縮成廢水全部(99%以上)回收再利用，無任何廢液排出工廠。水中的鹽類和污染物經過濃縮結晶以固體形式排出廠送垃圾處理廠填埋或將其回收作為有用的化工原料。<div>　　</div><div>　　一、膜分鹽工藝技術原理</div><div>　　隨著廢水成分越來越復雜，最常見的反滲透膜開始變得力不從心。所以，就需要一種擁有“魔法”的膜出現來解決這類復雜廢水。</div><div>　　納濾膜是孔徑范圍介于反滲透膜和超濾膜之間的一種壓力驅動膜。典型孔徑1nm，截留分子量150~200Da，選擇性分離多價離子和單價離子。兩側不同離子濃度所造成的滲透壓要遠低于反滲透膜，因此比反滲透膜所要求的操作壓力要低。</div><div>　　</div><div>　　二、納濾膜相對于反滲透膜具有以下幾點技術優勢：</div><div>　　1、碳酸氫根截留率較低,可以避免碳酸鹽結垢。</div><div>　　2、回收率高、系統穩定、CIP效率高。</div><div>　　3、運行壓力低，能耗低。</div><div>　　4、可以保證后續系統的穩定運行。</div><div>　　</div><div>　　三、膜法分鹽助力蒸發結晶工藝</div><div>　　在廢水分鹽*過程中主要有2種蒸發結晶工藝：一是借助于納濾和反滲透組合工藝先行分離一價陰離子和二價陰離子并分別進行預濃縮后，再各自進入蒸發結晶系統產出結晶鹽產品的工藝；二是通過在結晶過程中控制合適的運行溫度和濃縮倍數等來實現鹽的分離的熱法分鹽結晶工藝。</div><div>　　</div><div>　　<strong>廢水零排</strong><strong>放</strong>不同分鹽結晶工藝由于在裝備和操作條件上均有較大區別，其技術性能、投資和運行成本均存在很大差別，因此，對不同分鹽結晶工藝路線進行技術經濟比較是很多實際項目經常遇到的問題。</div><div>　　</div><div>　　四、膜法分鹽結晶工藝相較于熱法分鹽工藝具有以下特點：</div><div>　　1、可以使硫酸鈉、氯化鈉側物料濃縮操作線遠離共結晶點?？商岣呶锪系目蓾饪s程度和鹽產品的收率。</div><div>　　2、可以更*地降低氯化鈉結晶器進水中硫酸鹽的濃度，提高氯化鈉結晶鹽的收率和品質。</div><div>　　3、可以通過母液回流或返回部分融溶混鹽至預處理、納濾分鹽后，分別進入硫酸鈉和氯化鈉蒸發結晶系統，進一步提高鹽產量。</div> 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