本文關鍵詞：陶瓷膜處理含鎳電鍍廢水的研究　出處：《湖南科技大學》2015年碩士論文　論文類型：學位論文

  更多相關文章： 陶瓷膜 含鎳電鍍廢水 膜污染 膜清洗 堵塞模型 工業(yè)化設計

【摘要】：采用陶瓷膜微濾技術處理含鎳電鍍廢水,通過研究微濾過程操作參數(shù)影響、濃縮行為、膜污染機理、膜通量恢復及工業(yè)化設計等,拓展了陶瓷膜微濾技術在含鎳電鍍廢水中的應用。研究了平均孔徑分別為0.8?m和0.5?m陶瓷膜對含鎳電鍍廢水在pH=9時的微濾過程,考察了操作時間、跨膜壓差、錯流速度、溫度和濃縮因子對膜通量和鎳截留率的影響,探究了陶瓷膜的清洗行為及該微濾過程的數(shù)學模型。結果表明:隨操作時間延長,膜通量先迅速下降,然后基本不變;隨跨膜壓差增大或錯流速度增大,膜通量上升至趨于穩(wěn)定;溫度升高使得膜通量增大。0.8?m膜適宜操作參數(shù)為跨膜壓差0.12 MPa、錯流速度3.0 m/s和溫度30℃;0.5?m膜適宜操作參數(shù)為跨膜壓差0.14 MPa、錯流速度3.4 m/s和溫度30℃.在濃縮過程中,膜通量快速下降至平緩階段,再較快降低,鎳截留率約為99%。反沖能有效提高膜通量,且通量可恢復到初始通量的94%以上;采用質(zhì)量濃度0.15%鹽酸清洗污染陶瓷膜能使其通量恢復到新膜通量的97%左右;該微濾過程符合修正后的完全堵塞數(shù)學模型。對陶瓷膜微濾技術處理含鎳電鍍廢水進行了工業(yè)化設計,年處理500噸含鎳電鍍廢水,采用膜孔徑為0.8?m陶瓷膜,可滿足工業(yè)要求;設計了兩串四并工藝流程,具有良好的經(jīng)濟性。
[Abstract]:The nickel electroplating wastewater was treated by ceramic membrane microfiltration. The effects of operation parameters, concentration behavior, membrane fouling mechanism, membrane flux recovery and industrial design were studied. The application of ceramic membrane microfiltration technology in Ni-containing electroplating wastewater was expanded. M and 0.5? The effects of operation time, transmembrane pressure difference, cross-flow velocity, temperature and concentration factor on membrane flux and nickel retention were investigated. The cleaning behavior of ceramic membrane and the mathematical model of the microfiltration process were studied. With the increase of transmembrane pressure difference or cross-flow velocity, the membrane flux tends to be stable. The increase of temperature increases the flux of membrane. 0.8? The optimum operating parameters of m membrane are as follows: transmembrane pressure difference 0.12 MPa, cross-flow velocity 3.0 m / s and temperature 30 鈩，

本文編號：1391094