共查询到19条相似文献,搜索用时 156 毫秒
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反渗透脱盐技术在世界上已经迅速发展,我国从1992年起相继建成了一批反渗透处理厂。然而中、小电厂的化学水处理中尚少采用。本文着重反渗透装置的构造、工艺、设计注意事项,以及与离子交换的技术经济比较等方面进行分析论证,以期交面技术引进到煤炭系统水处理中来。 相似文献
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反渗透脱盐技术在世界上已迅速发展,我国从1992年起相继建成了一批反渗透处理厂。然而中、小电厂的化学水处理中尚少采用。本文着重反渗透装置的构造、工艺设计注意事项,以及与离子交换法的技术经济比较等方面进行分析论证,以期将此项技术引进到煤炭系统水处理中来。 相似文献
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论述了反渗透系统运行膜污染清洗及系统优化,探讨了清洗工艺,为反渗透系统优化设计及运行提供了依据。 相似文献
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微水发电厂化水系统技术改造后 ,形成了以PC机为主站、西门子S7- 2 0 0系列PLC为从站的全自动水制备控制系统。PLC与PC机用PC PPI电缆 ,通过串行口通讯 ,主站采用组态软件对整个系统实时监控、监测。1 系统组成1.1 水处理系统包括预处理系统、计量加药系统、反渗透系统三部分。四台多介质过滤器为预处理设备 ,三用一备。每台过滤器有7套气动阀门 ,按工艺要求切换控制。反渗透系统用一套一级二段反渗透单元组成 ,由一台高压泵和五套电动阀门作为执行机构。计量加药系统 4套 ,二用二备 ,每套加药系统有一台计量泵和一台电动搅拌装置… 相似文献
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徐州垞城电力有限公司Ⅲ期工程为2×135 MW循环流化床燃煤发电机组,其补给水处理采用的是全膜法处理方式,设计水源为大运河不牢河段运河水。其中反渗透装置为核心和最关键设备。垞电公司两套反渗透装置在运行1 a多的时间里,一级一段多次出现进口压力超过1.4 MPa、压差超过规定值、最大达到0.6 MPa的现象。对此进行了原因分析,并结合反渗透膜组件清洗的实践经验对处理方法进行了探讨。 相似文献
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The main objective of this work was to investigate the recovery of silver from mining wastewaters using a hybrid cyanidation and high-pressure membrane process. The tested hybrid process in lab-scale experiments includes the concentration and recovery of silver by nanofiltration (NF) or reverse osmosis (RO) after the silver is taken into solution as AgCN employing re-cyanidation and subsequent sedimentation and/or pre-filtration of wastewaters. Synthetic water experiments were conducted in this work. In synthetic water experiments (in distilled and deionized water), the soluble AgCN complex was formed after cyanidation of low-soluble AgCl particles which were added to the leach tank. Two different NF membranes and one RO membrane were tested in a lab-scale flat-sheet configuration test unit. The results indicated that although a significant amount of silver was lost on the RO membrane due to irreversible sorption, RO membrane performed better than NF membranes based on higher silver rejections, thus higher mass recoveries. Therefore, RO membrane was found to be more effective in terms of precious metal recovery and production of high quality permeate that can be reused in the leaching process. The tested hybrid cyanidation (leaching) and high-pressure membrane process in this work may be an effective approach in recovering precious metals and producing reusable water from wastes or wastewaters of mining industry. 相似文献
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针对中煤某矿井水高COD、高悬浮物的特点,采用混凝沉淀、过滤和反渗透工艺对矿井水进行了综合治理,考察其运行效果,对经济效益进行了分析。结果表明:经过絮凝沉淀和过滤工艺处理的出水水质可以达到井下消防、降尘洒水和选煤厂补水的用水标准,使废水重复利用,直接回用于矿区的生产,改善矿区用水紧张的局面。经反渗透系统(RO)深度处理后的外排水水质可以达到周边生态用水标准。RO系统深度处理前后的运行成本分别为0.416元/m3和0.738元/m3,每年节省水费高达270多万元。该工程项目的建成,不仅避免了废水直接外排对水资源的巨大浪费,也消除了对环境造成的不良影响,取得了良好的环境、社会和经济效益。 相似文献
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介绍了中国长城铝业公司400t/h反渗透系统开发应用的有关情况。采用反渗透技术改造离子交换除盐水处理系统,降低了制水成本,杜绝了环境污染。 相似文献
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Characteristics of produced water during coalbed methane (CBM) development and its feasibility as irrigation water in Jincheng, China 总被引:1,自引:0,他引:1
Water resources are scarce in Jincheng. Huge quantities of water are pumped out in the dewatering course, and the disposal of CBM water is one of the most important problems during the extracting of CBM. Based on the data of CBM water production, chemical characteristics, the irrigational conditions for major crops, and China irrigation water standard, the feasibility of CBM water as irrigation water is discussed. The result shows the CBM water quality doesn’t fully meet irrigation water quality standards in Jincheng, its high salinity and sodium adsorption ratio (SAR) in CBM water might affect crops growth and lead to yield loss, and can’t be used as irrigation water directly, but with the treatment of the reverse osmosis (RO) to lower the salinity and SAR of CBM water, the CBM water can be used as irrigation water. 相似文献
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采用化学气相沉积技术在铌基体上制备了BDD/Nb薄膜电极,并通过高温镍催化处理和电化学处理,获得了多孔BDD/Nb薄膜电极; 选用活性橙X-GN染料废水进行了模拟降解实验,探讨2种电极降解废水效果。结果表明:相比于BDD/Nb电极,多孔BDD/Nb电极的有效电极面积增加了2.8倍; 在活性橙X-GN染料废水降解实验中,多孔BDD/Nb电极的降解效率显著提高,相对于BDD/Nb电极,色度移除速度提高约4倍,COD移除速度提高约3倍,电流效率提高约15.92个百分点,能耗降低近75%。 相似文献
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《国际露天开采、回填与环境杂志》2013,27(2):126-132
Submarine disposal of mine tailings is a relatively recent technology that holds the promise of solving the recurring problems that the mining industry has had with tailings disposal. Implementation of this technology is however contingent upon the pre-treatment of the tailings, particularly those in the aqueous phase. One of the best-known methods to eliminate dissolved metal ions from an aqueous phase is reverse osmosis (RO). In this study, effluent water from mines was passed through a variety of RO membranes and the efficacy of removal was measured. RO was found to be an extremely effective method for cleaning mine effluent, and in the absence of cost limitations, can provide a significant solution to the mine tailings problem. 相似文献
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钢渣中f-CaO、f-MgO和RO相等非稳定性物质是影响其安定性的主要物质,限制了钢渣大规模资源化利用。直接法研究表明:在中、高碱度钢渣中存在大量的大尺寸球形呈聚集分布的f-CaO,降低碱度和气淬、热焖等处理方式可降低f-CaO含量和颗粒尺寸;化学合成CaO法研究表明,Fe和Mn离子掺杂会使f-CaO致密度升高,晶粒尺寸减小,其中Mn2+对晶粒尺寸减小作用更强。进一步论述了钢渣中f-CaO水化特性、钢渣体积膨胀率,以及f-CaO水化膨胀的相应数学模型和钢渣集料体积膨胀演化模型,压蒸粉化率与单粒径钢渣膨胀力的相互关系等进展。之后,综述了钢渣中f-MgO和RO相微观结构和水化特性,结果表明:钢渣碱度增加可促进方镁石形成,有利于MnO固溶到MgO-FeO固溶体;RO相水化活性与碱度、KM=nMgO/n(FeO+MnO)直接相关,钢渣中RO相并非稳定,当KM≥1时可能造成稳定性破坏。最后,指出了今后的研究方向:在不同钢渣碱度、处理工艺、陈化时间、水化程度等因素下,非稳定性物质在钢渣中水化反应速度、离子传输过程、显微结构层面力的传导机制;钢渣中活性矿物水化产物离子对非稳定性物质水化过程影响及其与钢渣膨胀特性、长期稳定性的关系;钢渣稳定性的判定标准、评价方法与其长期稳定性的关系。 相似文献