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膜分離技術在化工行業中的應用趨勢

2014-06-27 20:17:54 杭州沃騰膜工程有限公司 已讀

隨著膜科學的迅速發展,應用膜分離技術進行化工分離已進入大規模應用階段。化工產品、原料的純化、化工廢水的處理回用已逐步被人們接受,而 尤以化工廢水深度處理回用的發展最為迅速。本文針對膜分離技術在石油化工、化工、農藥化工、化肥工業節能減排方面的應用進行了敘述,重點介紹了膜分離 技術進行化工廢水處理回用的情況。

JINJISHINIANLAI,MOFENLIJISHUZAINENGYUAN、DIANZI、SHIYOU、HUAGONG、YIYAOWEISHENG、ZHONGGONG、QINGGONG、SHIPIN、YINLIAOXINGYEHERENMINRICHANGSHENGHUOJIHUANBAODENGLINGYUJUNHUODEGUANGFANDEYINGYONG。SHEHUIDEXUQIUCUSHIMOJISHUFAZHANXUNSU,SHIMOJISHUBUDUANCHUANGXIN、JINBU、WANSHAN,CHENGWEIJICHENGGUOCHENGZHONGDEGUANJIAN。

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膜分離技術在石油化工節能減排中的應用

微濾技術在石油廢水處理中的應用

采用南京化工大學膜科學技術研究所生產的0.2μm和0.8μm陶瓷膜進行陸上和海上采油平臺的采出水處理研究,經過適當的預處理后取得了較好的效果。懸 浮物含量由73~290mg/L 降至1mg/L以下,油含水量由8~583mg/L降至5mg/L以下。針對膜處理中最為關鍵的清洗問題,設計了脈沖及預處理工藝,有效地延長了過濾周 期。同時根據油田采出水對膜面的污染特征,確定了B、C兩種清洗劑交替使用的清洗方案。并驗證了所采用的預處理工藝、清洗工藝、脈沖工藝的可重復性和穩定 性,為工業性放大試驗奠定了技術基礎。針對低滲透油田注入水而研制的新型含油污水精細過濾裝置采用表層過濾技術,用陶瓷微濾膜(無機膜)作濾芯,采取交叉 流過濾方式對含油污水進行精細過濾,對于以小細粒(<8μm)為主的含油污水顆粒去除率達90%以上,精度可達1μm。研制的控制系統作為無機膜含 油污水處理裝置的配套裝置,實現了對整個過濾過程及脈沖反洗過程的全自動控制。采用絮凝劑絮凝和陶瓷膜微濾的組合工藝處理煉油廠“三泥”水相。研究結果表 明,絮凝處理可明顯降低水相的石油類濃度和COD,將絮凝處理與0.2μm氧化鋯膜過濾處理相結合,滲透液的石油類濃度和COD 可達到國家排放標準。以絮凝處理后出水的石油類濃度為基準,確定了合適的絮凝劑為3530S,并通過正交試驗確定了合適的絮凝處理工藝條件,即絮凝劑70 mg/L,溫度為40℃,攪拌90 min,靜置時間為1.5 h。絮凝處理能減輕膜污染,增大膜的滲透通量。考察了操作壓力和錯流速率對滲透液質量和膜滲透通量的影響,確定了合適的操作條件。
 
超濾技術在石油、化工廢水處理中的應用

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膜生物反應器(MBR)在石油、化工廢水處理中的應用

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膜集成技術在石油化工廢水處理中的應用

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膜分離技術在氯堿化工節能減排中的應用

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淡鹽水的膜法回收

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PVC離心母液的處理回收

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膜分離技術在農藥化工清潔生產中的應用概況

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MOJISHUYUCHUANTONGGONGYIDEJICHENG。

膜分離技術在化肥工業中的廣泛應用

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結論

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