气浮分离法的研究现状和发展方向(续)

气浮分离技术是一种简捷有效的分离与富集水中微量、痕量组分的方法,可用于矿物浓集或选择性分离,也可用于废水处理中,它在许多方面优于传统的分离方法.作者比较全面地综述了气浮技术的分类、装置、影响因素、机理、应用,并指出了气浮技术的发展方向.     

气浮分离法的研究现状和发展方向

气浮分离技术是一种简捷有效的分离与富集水中微量、痕量组分的方法,可用于矿物浓集或选择性分离,也可用于废水处理中,它在许多方面优于传统的分离方法.作者比较全面地综述了气浮技术的分类、装置、影响因素、机理、应用,并指出了气浮技术的发展方向.     

气浮塔处理含油废水的研究

在实验研究的基础上，结合单级气浮技术和多级板式塔理论，开发出两级气浮塔处理含油废水的新工艺，实现了塔釜一次曝气、多级气浮的分离。实验研究了气浮塔板的流体力学性能、布气性能及操作条件对废水处理效率的影响，结果表明二级气浮塔处理效果很好，是一种具有良好应用前景的新型含油废水处理装置。     

气浮分离法在硫化氢制氢过程中强化硫磺分离应用研究

间接电解硫化氢技术中生成的硫磺颗粒小且呈絮状,所以硫磺分离一直是重点和难点。结合间接电解法生成硫磺的特性,选用气浮法迚行硫磺分离。通过气浮实验条件的确定、成品硫磺模拟气浮实验、模拟吸收液气浮实验确定气浮法分离H_2S制氢过程中生成硫磺的效果及条件。     

涡凹气浮(CAF)在石化废水处理中的应用

为去除石化废水中的石油类及固体悬浮物,传统采用的处理方法是溶气气浮。ＤＡＦ尽管能达到一定的去除效果,但它的整个系统过去复杂,占地面积大,投资及运行费用高,维修不方便等多缺点已被同仁达成共识。涡凹气浮系统能克服上述诸多缺点,达到满意的处理效果。     

废水处理中电凝聚气浮技术的研究现状与进展

简要介绍了电凝聚气浮技术的作用机理及其应用领域,综述了电凝聚气浮技术处理效率的影响因素、与其它处理工艺的结合以及处理装置等几方面的研究进展,指出了该技术存在的问题及研究方向     

气浮的分类与发展

介绍了目前应用比较广泛的气浮方法的分类，各种方法的原理。怎么才能提高气浮效率以及新的方法的研究。     

涡凹(CAF)气浮-生物接触氧化工艺处理纸箱生产废水

采用CAF涡凹气浮-生物接触氧化工艺处理纸箱生产废水，在进水CODcr、SS和石油类分别为1301mg/L、540mg/L和12.5mg/L的情况下，出水平均值分别为61.5mg/L、37.3mg/L和0.88mg/L。     

旋流—充气气浮系统及其机理的研究

从分析沉淀气浮过程的热力学、动力学和有关的机理出发,利用射流溶气、布气板充气及旋流原理,研究出的一种有高负载能力,高气浮分离效率的新型回收处理重金属离子废水的设备——旋流——充气气浮系统。气浮分离效率在97%以上,比常规加压溶气气浮系统快十倍以上,能耗减少30%。     

贵州某硫铁矿浮选工艺研究

采用浮选工艺分选贵州某硫铁矿,试验结果表明,在磨矿细度为-0.074mm占79.44%,捕收剂GY用量为380g/t,2#油用量为150g/t的条件下,采用一次粗选、一次精选、一次扫选闭路浮选工艺流程,可获得硫分质量分数为45.36%、回收率为80.55%的硫精矿,尾矿中硫分质量分数仅为2.96%、损失率为19.45%。     

海上生产水处理用紧凑型气浮技术研究

介绍了一种生产水处理用紧凑型气浮技术,基于该技术的处理设备因结构紧凑、性能高效,尤其适用于海上石油平台。现场测试结果表明,该设备采用两级串联能将生产水中的油从2 000 mg/L以上降至20 mg/L以下,总水力停留时间仅为5 min,相较于常规处理设备体积至少减小50%,处理优势明显,值得继续开展产品优化及系列化设计,以加快工程应用进程。     

磷矿浮选药剂对尾矿澄清性能的影响

采用一种简易方法考察了常用磷矿浮选药剂对浮选尾矿澄清性能的影响.结果表明:该试验方法误差较小,可以用于评价浮选药剂对浮选尾矿澄清性能的影响.在海口磷矿浮选药剂中,调整剂水玻璃对浮选尾矿澄清性能影响最大,其次为MW.捕收剂用量对浮选尾矿澄清性能影响较小,但捕收剂的种类则对浮选尾矿的澄清性能影响较大.使用工业捕收剂H969浮选的尾矿澄清性能要远低于使用工业油酸时尾矿的澄清性能.增效剂的使用可提高浮选尾矿的澄清性能.     

Oilfield produced water treatment in internal-loop airlift reactor using electrocoagulation/flotation technique

Oilfield produced water is large quantities of salty water trapped in underground formations and subsisted under high temperatures and pressures that are brought to the surface along with oil during production. Produced water(PW) contains a lot of pollutants such as hydrocarbons and metals, this water must be treated before disposal. Therefore, different techniques are being used to treat produced water. Electrocoagulation is an efficient treatment technique involving the dissolution of anodes and formation of electro-coagulants, while the simultaneous generation of H_2 bubbles at the cathode leads to the pollutant removal by flotation. Electrocoagulation(EC)method is one of the most promising and widely used processes to treat oilfield produced water. In the present work, a conventional internal-loop(draught tube) airlift reactor was utilized as electrocoagulation/flotation cell for PW treatment by inserting two aluminum electrodes in the riser section of the airlift reactor. The EC airlift reactor was operated in a batch mode for the liquid phase. Different experimental parameters were studied on the oil and turbidity removal efficiencies such as current density, initial pH, electrocoagulation time, and air injection.The experimental results showed that mixing of the oil droplets in the PW was accomplished using only the liquid recirculation resulted by H_2 microbubbles generated by EC process which enhanced the oil removal. The experimental results further showed that the EC time required achieving ≥ 90% oil removal efficiency decreases from 46 to 15 min when operating current density increases from 6.8 to 45.5 mA·cm~(-2). This reactor type was found to be highly efficient and less energy consuming compared to conventional existing electrochemical cells which used mechanical agitation.     

Concentration profiles in a laboratory flotation machine: development of a simple sampling technique

The method uses a pipette with pilot tube-shaped sampling orifice. Error analysis, statistical methods, and consideration of hydrodynamic factors have led to a simple and accurate sampling technique. The incremental volume RTD method used to verify the pipette method confirms agreement between procedures, but the pipette method provides far more detail with no more effort.The concentration profile of the Denver D1 laboratory flotation machine was studied at different impeller speeds and impeller/stator clearances. Closely sized glass beads were used as tracer. Within its operating speed range, the machine is far from ideally mixed, and the profiles are very irregular near the impeller/stator assembly. The results are discussed and suggestions made for further research.     

浮选新型设备——双流态微泡浮选机

介绍了双流态微泡浮选机的工作原理,该机将矿化与浮选分置作业；采用专门的压气式微泡矿化器,矿化效果好；在分选桶内设置限流桶,减少中矿循环流与尾矿流的干扰,处理量大；采用前置加药方式,减少了药剂消耗；通过与其它型号浮选机和浮选柱对比,证明该机精煤产率高、造价低、生产成本低；该机技术先进,推动了我国选煤行业的发展。     

Precipitate flotation. III. Parameters of precipitate flotation of the first kind

Precipitates of strontium carbonate (10^?3 mole litre^?1) were floated using dodecylpyridinium chloride, hexadecylpyridinium bromide, hexadecyltrimethylammonium chloride and a dialkyldimethylammonium chloride. Flotations were performed at a gas flow-rate of 7 litre hour^?1 for 3 minutes or 2 litre hour^?1 for 20 minutes. Complete recoveries were possible by both methods, provided optimum concentrations of collector were used. If too little collector was present, redispersion of precipitate occurred because the foam formed was insufficient to support it. With too much collector, the precipitate was excluded from the bubbles and also became coated by a double layer of collector which gave a hydrophilic surface. Increase of temperature and of time allowed for precipitation, improved recoveries because of increased particle size. Flotations were not complete below 10^?3 m unless the strontium carbonate was co-precipitated in calcium carbonate, when 10^?8 m could be recovered. Increased ionic strength reduced recoveries because it caused precipitation to be slower, attachment of collector to the precipitate to be less secure, flotation of the collector to be more rapid and foam drainage, and hence redispersion, to increase.