共查询到16条相似文献,搜索用时 156 毫秒
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研究了中空纤维式超滤器浓缩大豆蛋白水溶液时的膜污染机理以及反压冲洗法对膜污染的控制作用 .结果表明 :对工作过程中的超滤膜进行定期反压冲洗可以有效地控制膜污染程度 相似文献
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以电厂循环水为水源,研究某国产超滤膜水通量、透膜压差等参数的变化趋势以及该超滤膜去除水中有机物和胶体硅的能力。结果表明,该超滤膜在原水水质较差的情况下能保持较高水通量和较低的透膜压差,具有良好的运行性能,同时该超滤膜具有一定的去除有机物和胶体硅的能力。 相似文献
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内压式中空纤维超滤膜在水处理中的应用 总被引:2,自引:0,他引:2
介绍新一代内压式超滤膜技术在电力生产不同水处理领域中的应用情况,介绍在超滤产水水质、过滤方式、在线絮凝等几方面总结的超滤膜的应用经验。 相似文献
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介绍新一代内压式超滤膜技术在电力生产不同水处理领域中的应用情况,介绍在超滤产水水质、过滤方式、在线絮凝等几方面总结的超滤膜的应用经验. 相似文献
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要使火电厂循环水排污水达到回用的目的,一般采用超滤作为前置处理的反渗透除盐法.针对火电厂循环水排污水的特点,文章分析了超滤膜受污染的原因,探讨了超滤膜污染的特点、污染物类型、及影响因素,同时给出了采用化学清洗法消除超滤膜污染的技术要点. 相似文献
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对中宁发电有限责任公司锅炉补给水系统超滤装置在运行中经常出现超滤膜爆破的问题进行了分析,提出了防止超滤膜爆破的有效措施,使超滤装置恢复了安全、经济、健康的运行状态。 相似文献
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分析了珠江电厂反渗透膜运行中压差高的原因,指出由于停机冲洗水及低压冲洗水污染反渗透膜、超滤水箱水质不良、设备加药量不稳定、多介质过滤器产水浊度升高、启动多介质过滤器和超滤水箱时管道腐蚀产物加大了超滤水箱的负担等原因均导致反渗透膜压差高。针对以上问题,提出更改冲洗水源、修改超滤水箱运行参数、调整设备加药量和多介质过滤器反洗参数、过滤器和超滤水箱启动时增加冲洗管道的程序等处理方法来解决反渗透膜压差高的问题。处理后,两个反渗透膜的压差均下降;通过分析处理后反渗透运行指标,明确了需要进一步完善的应对措施,并提出具体建议。 相似文献
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对比了超滤净水机和反渗透净水机的区别,重点分析了两类净水机在不同水质下的实际应用效果,根据实验数据,总结出两类净水机的优长与不足,并给出了相关建议。 相似文献
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Poly(vinylidene fluoride) (PVDF)/polymethylmethacrylate (PMMA) hollow fiber ultrafiltration (UF) membranes were prepared via wet spinning method using polyvinylpyrrolidone (PVP) as pore-foaming agent, mixture of dimethyl formamide (DMF) and dimethyl acetamide (DMAc) as solvent, and pure water as an external coagulation solution. Effects of PVDF, PVP and PMMA concentration on performance of the membrane were discussed. The surface and cross-sectional morphology, hydrophilic property, the tensile strength and elongation of the hollow fiber membrane were measured, respectively. Results indicated that the performance of the membrane is the best with a pure water flux of 124 L/m2·h and rejection rate of 73% to bovine serum albumin (BSA), when the concentration of PVDF, PMMA, PVP, DMF and DMAc are 18, 0.5, 1.5, 40 and 40 wt%, respectively. 相似文献
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Hiroshi Enomoto Masashi Fujitsuka Tomoyasu Hasegawa Masatoshi Kuwada Akihiko Tanioka Mie Minagawa 《Electrical Engineering in Japan》2010,173(2):8-20
A pressure‐retarded osmosis (PRO) power generation system is a hydroelectric power system which utilizes permeation flow through a semipermeable membrane. Permeation flow is generated by the potential energy of the salinity difference between sea water and fresh water. Since the cost of the membrane is high, the permeation performance of the membrane must be improved in order to realize PRO systems. We have investigated reverse osmosis (RO) membrane products as semipermeable membranes and measured the permeation volume of a few products. The generation power per unit membrane area calculated from the permeation volume is about 0.62 W/m2. But as a result of our improvements (greater salt water volume, spacers for fresh water channel with the function of discharging concentrated salinity, extralow‐pressure type of membrane, washing the support layer of membrane when the generation power falls by half) the generated power may be 2.43 W/m2. Then the power system cost would be about 4.1 million yen/kW. In addition, if the support layer of the membrane is made thinner and a PRO system is applied to equipment where pumping power for another purpose is available (wastewater treatment plants located at the seaside, thermal and nuclear power plants, sea water desalination plants), the generated power may be increased. These improvements may enable PRO systems to be realized at a cost close to that of photovoltaic power systems. 2010 Wiley Periodicals, Inc. Electr Eng Jpn, 173(2): 8–20, 2010; Published online in Wiley InterScience ( www.interscience. wiley.com ). DOI 10.1002/eej.21000 相似文献
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用于水和废水处理的先进膜技术 总被引:2,自引:0,他引:2
介绍2种先进的用于水和废水处理的膜技术——浸入式超滤和电去离子(EDI)技术。描述2种膜工艺的构造和原理,阐述它们的技术经济特点,并给出浸入式超滤与石灰处理的比较,以及在使用反渗透产品水作给水的情况下,EDI与离子交换混床的比较。指出虽然这2种膜系统投资费较高,但运行费用低,占地面积小,自动化程度高,环境效益好,尤其适用于缺水地区水的再循环和废水再利用。 相似文献