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

  更多相關(guān)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(shè)計(jì)

【摘要】：采用陶瓷膜微濾技術(shù)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(jī)理、膜通量恢復(fù)及工業(yè)化設(shè)計(jì)等,拓展了陶瓷膜微濾技術(shù)在含鎳電鍍廢水中的應(yīng)用。研究了平均孔徑分別為0.8?m和0.5?m陶瓷膜對(duì)含鎳電鍍廢水在pH=9時(shí)的微濾過程,考察了操作時(shí)間、跨膜壓差、錯(cuò)流速度、溫度和濃縮因子對(duì)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(xué)模型。結(jié)果表明:隨操作時(shí)間延長(zhǎng),膜通量先迅速下降,然后基本不變;隨跨膜壓差增大或錯(cuò)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(cuò)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(cuò)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(fù)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(fù)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(xué)模型。對(duì)陶瓷膜微濾技術(shù)處理含鎳電鍍廢水進(jìn)行了工業(yè)化設(shè)計(jì),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(shè)計(jì)了兩串四并工藝流程,具有良好的經(jīng)濟(jì)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(hào)：1391094