聚偏氟乙烯中空纤维膜的研制

本文选用聚偏氟乙烯作为膜材料,二甲基甲酰胺为溶剂,聚乙二醇为添加剂,采用湿法纺丝成膜,对影响膜性能的诸因素进行了讨论,用所制的中空纤维膜组件对TNT废水进行了膜萃取实验。用回归正交实验设计确定的最佳配方为聚偏氟乙烯浓度22.14%,聚乙二醇浓度6.26%,二甲基甲酰胺71.60%,纺丝温度54.84℃。该最优组合膜的萃取速率为1.898mg/m     

由飞灰合成的沸石吸附废水中染料的动态平衡

The removal performance of a basic dye, methylene blue (MB), in aqueous solution was investigated by adsorption process on single-phase and high-crystalline zeolite A (FA-ZA) and X (FA-ZX). Both adsorbents FA-ZA and FA-ZX were synthesized from fly ash prepared aluminosilicate gel followed by the hydrothermal treatment at 100°C with the control of Si/Al molar ratio, respectively. The properties of the synthetic zeolites and commercial grade zeolites, such as thermal stability, elemental composition, and cation exchange capacity, were investigated for comparison. Batch method was used to study the influential parameters, such as initial pH value of the solution, temperatures, and adsorbents dosage, on the adsorption process. The experimental data were well fitted by Ho’ pseudo-second-order model and liquid film diffusion model. The suitability of Langmuir and Freundlich isotherms to the equilibrium data was investigated in the solid-liquid system while the Langmuir model produces the best re-sults. Thermodynamic data (ΔH, ΔS, and ΔG) corresponding to the MB uptake were evaluated from the Langmuir model. In all the adsorption experiments, the adsorption capacity followed the order as follows: FA-ZX > FA-ZA. In addition, attempts were also made to regenerate the adsorbents.     

磷石膏部分代替二水石膏的试验及应用

介绍了应用磷石膏部分(或全部)代替二水石膏作水泥缓凝剂的技术。通过对比试验和生产实践,表明磷石膏对普通硅酸盐水泥、复合硅酸盐水泥具有良好的缓凝增强作用,能有效地改善水泥的理化性能,并具有显著的经济、社会及环保效益。     

用镁渣、磷渣配料提高熟料质量

结合试验研究和工业生产的实际,应用镁渣、磷渣调整水泥生料的配料方案,并采取适当的工艺措施较大幅度地提高了熟料质量和窑产量。     

适应ISO国际标准的试验与对策

随着ISO国际标准的实施以及我国即将加入WTO，水泥产品的竞争日益激烈，由于立窑水泥质量受设备工艺条件，技术力量等因素的制, 对旋窑水尼来说，面临新形势的挑战将会更加严峻，目前，每个企业必须迅速行动起来，结合自身实际，深入研究，及早作出相应的对策，适应．ISO国际标准的平衡过度，为此，笔者就本公司在“立窑水泥如何适应ISO国际标准的试验与对策”方面的科研试探和生产实践的一些心得，与广大同行共同研讨。     

掺入适量稀土贫矿改善水泥熟料性能

提出在生料中掺入适量稀土作矿化剂煅烧,采用不同率值的熟料配方进了尝试,得出此方法可改善水泥熟料性能的结论.     

三峡大坝船闸变电站6 kV系统的铁磁谐振现象及其治理

介绍了三峡大坝船闸变电站6kV系统的铁磁谐振现象及性质判断，进行了治理措施，收到了良好的效果。     

试论人民币升值问题

我国近两次通货膨胀的重要原因之一是由宽进严出的外汇管理制度造成的外汇占款过多所致。通过资料数据和实例分析，认为人民币应该有控制地缓慢升值，其升值幅度只要低于利率，就能控制“热钱”涌入，打击人民币投机者，最后提出了相关的政策性建议。     

膜萃取法处理TNT生产废水的研究

本文介绍了中空纤维膜萃取ＴＮＴ的方法，通过膜萃取实验，研究了萃取时两相压力差和流速对萃取效率的影响。结果表明，废水中ＴＮＴ的萃取率可达９０％左右，能使工业ＴＮＴ废水达到国家排放标准。