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如何正確使用膜清洗劑
發布時間:2020-05-21 09:35
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    膜元件沒有及時清洗,污染物將不斷損壞膜元件,造成膜元件性能下降、損傷、無法繼續使用等影響。但是膜元件清洗不當也會對膜及出水產生影響,如清洗完后產水沒有流量、損傷膜元件、影響膜性能等。對于膜污染的清洗方法一般分為物理清洗和化學清洗兩種。
 
物理法清洗膜元件
 
    這種方法主要針對尚未牢固的各類垢層,通常是采用水流沖力,以較低壓力與較大流量對膜表面及膜孔形成高速徑流,以消除濃差極化層。此法對減弱及緩解膜污染起著重要的作用,通常應用于預處理工藝相對薄弱的中小型系統。
 
化學法清洗膜元件
 
    這種方法是使用酸堿清洗劑或氧化劑對膜元件進行清洗,一般而言,清除有機物用堿,清除無機物用酸,而清除微生物用氧化劑,且多采取各種藥液輪流清洗的方式。但是這種方法需要采用專用膜清洗劑和運用專業的清洗方法,否則也容易造成膜損傷及影響膜性能。
 
如何正確使用膜清洗劑
 
    1.對于反滲透膜清洗建議采用膜專用清洗劑;

    2.先進對膜元件污染物進行化學分析,再根據分析結果詳細比較選擇對應的清洗劑及清洗方法;

    3.在專業人士指導下進行清膜并學習專業洗膜技術;

    4.記錄每次清洗效果,為在特定給水情況下,找出最佳的清洗方法提供依據和保障。
 




相關內容………專業分享:不同膜的不同清洗方法
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