中浩遠達|反滲透膜 綠色清洗
WATERTREATMENT
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掃碼關注我們
中浩遠達 工業水處理
膜污堵會對其性能產生各種不利影響:
如膜通量下降、膜間運行壓差增加、產水水質下降等,
導致膜系統清洗頻率和維護成本升高、膜壽命縮短等,
有效的污堵成因分析和相應的防控對策是促使污水再生處理反滲透工藝穩定運行的關鍵。
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某反滲透進水水質,由表可知:
(1)反滲透進水硅含量較低,同時當pH 值低于 7 或者高于 7.8,硅的溶解度增加,因此硅污堵可能性較低;
(2)進水電導率、硬度等均不高,且中間水池 pH 控制在 6.5~7.0 范圍內,反滲透系統進水的朗格利爾飽和指數小于零。
因此反滲透膜金屬離子結垢、過飽和析出導致的無機污堵可能性均較低。
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人工監測,測量頻次為 1 次/d,測量點在反滲透進水高壓泵出口。從監控情況來看:
(1)反滲透進水SDI值存在異常,反滲透進水 SDI 在污堵嚴重時高達5.9,剛測定的膜片表面存在難聞的氣味,推斷保安過濾器出水存在微生物黏泥可能性較大。
(2)檢查保安過濾器濾芯發現,保安過濾器濾芯表面手觸粘滑并伴有難聞的氣味,結合 SDI 測試情況,推斷保安過濾器濾芯表面存在生物膜污堵可能性較大。
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中浩遠達化學清洗過程也印證了此觀點:
(1)在化學清洗酸洗過程中,膜間壓差無大變化,同時在酸洗操作過程中,化學清洗罐pH值變化不大。
(2)采用殺菌+堿洗膜基本能恢復清洗前膜間壓差,同時在堿洗操作過程中,化學清洗罐pH值變化較大。
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中浩遠達膜法水處理,您身邊的水處理廠家。為企業用水,保駕護航。
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