共查询到15条相似文献,搜索用时 93 毫秒
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管式陶瓷微滤膜的制备研究 总被引:16,自引:2,他引:16
以陶瓷微滤膜的工业化生产为目标,详细研究了原料的分散、分级和粉碎过程,采用陶瓷作粘结剂,成功地制备出孔径在0.8μm以上的管式微滤膜并实现其工业化生产.本工作所生产的管式陶瓷微滤膜具有良好的强度、化学稳定性和渗透性能,其纯水通量为10-2L/m2·h·Pa,细菌截留率在99.999%以上,可以用于工业微滤过程. 相似文献
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我国大部分油田采用注水方式采油,且目前大都已进入高含水期。尽管近些年来国内油田的水处理技术发展较快,但同国外相比差距仍很大,还不能完全适应国内油田发展的需要。随着我国对污染治理力度的加大,以及人们对油田采出水经处理后作为采油注水具有一系列优点的认识不断提高,油田采出水经深度处理后排放或回注已愈来愈受到人们的重视。 相似文献
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硅藻土梯度陶瓷微滤膜的饮用水净化 总被引:12,自引:0,他引:12
研究了硅藻土梯度陶瓷微滤膜对自来水的净化性能。结果表明,平均孔径为0.15μm的梯度陶瓷膜,可100%滤除水中的大肠杆菌、沙门氏菌、金葡萄球菌和霉菌等致病病菌以及铁锈、红虫和各种悬浮微粒。通过简单的机械清刷,通量可完全恢复,无膜的深层污染和孔隙堵塞,可有效地防止净水的再次污染,一个10英寸(1英寸=25.4mm)的标准滤芯可净化普通自来水50m^3以上。 相似文献
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聚砜中空纤维超滤膜在油田注入水处理中的应用 总被引:14,自引:1,他引:14
介绍了胜利油田利用中空纤维超过滤技术对特低渗透油田注入水的精细处理,超滤后水中颗粒粒径≤1μm,注入水质得到明显的提高,取得了明显的开发效果。 相似文献
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N. Das S. Bandyopadhyay D. Chattopadhyay H. S. Maiti 《Journal of Materials Science》1996,31(19):5221-5225
Alumina membrane filters in the form of thin (0.3–0.8 mm) discs of 25–30 mm diameter suitable for microfiltration application, have been fabricated by the tape-casting technique. Their pore size could be varied in the range 0.1–0.7 m and porosity in the range 25%–55% through optimization of experimental parameters. The most important factor which determines the pore size, is the initial particle size of ceramic powders used for this purpose. Temperature of firing, and also the soaking time are crucial parameters which determine the porosity. Water permeability under suction conditions varies in the range 110–900 lm–2h–1 depending on porosity, pore size and thickness of the membrane. Most of these membranes, particularly those with pore sizes less than 0.5 m, are found to be suitable for complete removal of bacteria from water and are also reusable after cleaning by acid or heat sterilization. 相似文献
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Ilyes Jedidi Sami Saïdi Sabeur Khemakhem Andr Larbot Najwa Elloumi-Ammar Amine Fourati Aboulhassan Charfi Abdelhamid Ben Salah Raja Ben Amar 《Journal of hazardous materials》2009,172(1):152-158
This work aims to develop a new mineral porous tubular membrane based on mineral coal fly ash. Finely ground mineral coal powder was calcinated at 700 °C for about 3 h. The elaboration of the mesoporous layer was performed by the slip-casting method using a suspension made of the mixture of fly-ash powder, water and polyvinyl alcohol (PVA). The obtained membrane was submitted to a thermal treatment which consists in drying at room temperature for 24 h then a sintering at 800 °C. SEM photographs indicated that the membrane surface was homogeneous and did not present any macrodefects (cracks, etc…). The average pore diameter of the active layer was 0.25 μm and the thickness was around 20 μm. The membrane permeability was 475 l/h m2 bar.This membrane was applied to the treatment of the dying effluents generated by the washing baths in the textile industry. The performances in term of permeate flux and efficiency were determined and compared to those obtained using a commercial alumina microfiltration membrane. Almost the same stabilised permeate flux was obtained (about 100 l h−1 m−2). The quality of permeate was almost the same with the two membranes: the COD and color removal was 75% and 90% respectively. 相似文献
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以辽河油田某稠油污水处理厂外排水为对象,采用混凝与微滤膜(MF)处理相结合的方法.从操作压差、膜孔径、混凝处理等多个角度对稠油污水膜分离及组合工艺进行条件优化和效果分析.确定选择0.5 μm孔径膜、0.25 MPa操作压差为膜最佳操作运行条件;通过常规的混凝和膜分离联合处理方法可有效去除稠油废水中悬浮性及部分可溶性有机污染物,处理后出水COD平均浓度86~97 mg/L,去除率达到43.4 %;且膜清洗通量能够恢复96.8%.结果表明该工艺远优于传统工艺,可以作为稠油污水二级处理保障工艺. 相似文献
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