温度对PPS滤料挺度及耐磨性影响的实验研究

在高温烟气作用下,袋除尘滤料机械性能会发生一定的变化。文章研究了不同温度、不同加热时间对PPS滤料挺度及耐磨性的影响。结果表明:PPS滤料工作环境温度越高,其挺度值越大、耐磨性越低;PPS滤料不能在190~℃及以上的温度中长时间工作;PPS滤料的挺度值越大其耐磨性能越差。     

高性能水刺玻纤复合滤料性能的研究

通过实验对比水刺类与针刺类玻纤复合滤料的机械性能、过滤性能，阐述了针刺玻纤复合滤料存在的缺陷及水刺玻纤复合滤料的技术优势。     

PPS针刺滤料及其在焚烧炉尾气处理中的应用

文章介绍了PPS针刺滤料的优良物理机械性能、耐温、耐酸碱性,及它在袋式除尘器中的成功应用。     

袋除尘滤料过滤性能测试平台改造研究

过滤性能是袋除尘滤料的核心指标,其测试对评估滤料性能、保证滤料质量相当重要.本文在分析现有测试标准的基础上,对既有的测试平台进行了改造,改造后不仅拓宽了既有平台的适应范围,而且极大节省了成本.本研究对滤料生产与质量评定有积极意义.     

PPS覆膜滤料的性能及应用

通过VDI滤料模拟测试装置、SEM等先进仪器对PPS覆膜滤料的性能进行测试分析,比较了常规PPS和PPS覆膜滤料性能,列举了其在燃煤电厂中的应用情况,阐明PPS覆膜滤料优异的过滤性能及工程应用效果。     

滤料级配过滤含聚污水数值模拟研究

以磁铁矿滤料与石英砂滤料为填设滤料层的级配模式一直广泛应用于油田含聚污水处理过程中,但这种滤料级配与污水过滤性能之间的影响关系及规律认识却较为缺乏,本文以悬浮粒子吸附与截留形成的聚集特征为切入,定量分析出水水质特性,对含聚污水过滤过程中滤料级配的影响效果展开数值模拟研究。研究认为：磁铁矿滤料层厚度较大的级配模式过滤具有更好的悬浮粒子吸附与截留效果,对更小粒径悬浮粒子过滤能力更优,但滤料填充高度比与过滤效果存在一定适配性;以1.28以上磁铁矿滤料厚度较大的级配模式过滤较低含聚浓度污水、以1.67以上磁铁矿滤料厚度较小的级配模式过滤较高含聚浓度污水,均可以使出水悬浮固体颗粒与油滴含量均低于5mg/L,满足过滤出水水质指标要求。     

滤料级配过滤含聚污水数值模拟研究

以磁铁矿滤料和石英砂滤料为填设滤料层的级配模式,一直被广泛应用于油田含聚污水处理过程,但目前这种滤料级配对过滤性能的影响及规律认识较为缺乏。文章从悬浮粒子(包含悬浮固体颗粒和油滴)吸附与截留形成的聚集特征切入,定量分析出水水质特性,对含聚污水过滤过程中滤料级配的影响效果展开数值模拟研究。研究表明：磁铁矿滤料层厚度较大的级配模式过滤,对悬浮粒子具有更好的吸附与截留效果,对小粒径悬浮粒子的截留能力更优,但滤料填充高度比与过滤效果存在一定适配性;以填充高度比1.28以上磁铁矿滤料厚度较大的级配模式过滤较低含聚浓度的污水,及以填充高度比1.67以上磁铁矿滤料厚度较小的级配模式过滤较高含聚浓度的污水,均可以实现出水悬浮固体颗粒和油滴含量低于或约等于5 mg/L,满足大庆油田含聚污水二级过滤出水回注水质指标要求。     

炉渣用于深层过滤的试验研究

将炉渣用作深层过滤的床层过滤,在油田水处理中具有良好的应用前景。通过对炉渣滤料的物性测定,对流体力学性能、过滤性能及反洗性能的研究,获得了有关炉渣滤料的粒径分布、床层孔隙率、密度、吸水率等物性参数,以及清洁滤料床层阻力与速度的关系曲线和流化曲线,过滤条件下床层阻力随时间的变化关系和悬浮物脱除率随时间的变化曲线,炉渣床层的反洗曲线。结果表明：炉渣表面粗糙,有棱角,吸附表面积大,孔隙率大,过滤效果好;炉渣滤料密度小,反洗效果较好,反洗用水量只是过滤水量的５％左右;同时,炉渣作为滤料用于深层过滤,不仅来源广泛,而且属废物利用。     

袋式除尘器用滤料失效分析

随着袋除尘在工业烟尘控制领域的广泛应用,滤料失效越来越引起行业重视。应用故障树分析方法系统研究了滤料失效的模式,并对滤料破损失效、滤料阻力增大失效、滤料透滤排放超标失效进行了致因分解,找出了引起滤料失效的最基本原因事件,对指导现场安全使用滤料有较好的帮助。     

悬置螺栓断裂失效分析

本文从断口分析、化学成分、机械性能、拧紧性能等方面开展综合验证,分析了某汽车悬置螺栓断裂原因。结果表明,该螺栓为摩擦系数变化引起的过载断裂。     

聚苯硫醚新型滤料的特点及应用

介绍并分析了聚苯硫醚新型滤料的生产工艺及产品性能特点,提出了聚苯硫醚新型滤料在袋式除尘行业中的应用前景。     

Environmental benefits of substituting talc by sugarcane bagasse fibers as reinforcement in polypropylene composites: Ecodesign and LCA as strategy for automotive components

The auto industry is compelled to improve its environmental performance, namely by making use of renewable materials and cleaner manufacturing processes with lower energy intensity, and at the end-of-life of the auto, recyclable products and materials are desirable specifications that need to be considered at an earlier design stage, i.e., promoting the ecodesign. This paper provides an analysis of such a strategy for a material that is used extensively in the auto industry, namely polypropylene composites, as we have quantified the environmental impacts when sugarcane bagasse-reinforced polypropylene substitutes for talc-filled polypropylene (PP). To achieve these goals, a comparative Life Cycle Assessment (LCA) was performed for the two alternatives, from raw extractions to the end-of-life (EOL) phase of sugarcane bagasse-PP and talc-PP composite, where data gathered in different industries in Brazil were included in the LCA GaBi software. Our analysis shows that in addition to similar mechanical performance, natural fiber composites showed superior environmental performance throughout the entire life cycle. This superior performance is because: (1) in the cultivation phase, sugarcane absorbs carbon through the photosynthesis process while growing, thus reducing the global warming impact of the materials used; (2) the production process is cleaner; (3) sugarcane bagasse-reinforced composites are lighter for equivalent performance, which reduces the amount of polypropylene used; and (4) the economic reuse proposed for the EOL sugarcane bagasse-PP composite was the best alternative to minimize environmental impacts.     

反硝化脱氮固体碳源材料研究进展

在污水处理中，固体碳源是制约生物反硝化脱氮的重要因素。天然固体碳源有着丰富的来源，但是机械强度低；人工合成固体碳源有很好的物理性质，但是造价较高；天然高分子材料经过改造后具有价格低、物性好的优点，因而成为研究的热点，且具有很好的市场前景。     

Removal of organic pollutants and nutrients from olive mill wastewater by a sand filter

The aim of this work was to examine the performance of a sand filter in treating modern olive mill (OMW) effluents after dilution with domestic wastewater on a one-to-one basis. The experimental pilot consisted of a column of opaque PVC, and the sand filter was filled with 50 cm of sand and 10 cm of gravel in the top and the bottom of the filter. The alimentation (4 cm/day) was done sequentially following a 1 day wet/3 days dry cycle. The OMW effluent was very acidic with a pH of 4.12, and had high concentrations of phenolic compounds (7.2 g/L) and total chemical oxygen demand (65 g/L). The percolation of the diluted OMW through the sand filters caused an increase in pH from 4.84 to 8.25 and a 90% removal of total suspended solids. The sand filter treatment also led to important reductions in organic matter (90% of total COD, 83% of dissolved COD and 92% of phenolic compounds) and nutrients (91% of Kjeldahl-nitrogen, 97% of ammonia-nitrogen, 99% of nitrate-nitrogen and 99% of phosphates). The flow rate became very low indicating clogging of the sand pores after 10 weeks. HPLC analysis of the diluted OMW before and after passage through the sand filter showed an important reduction in the toxic monomeric compounds after the treatment.     

聚酰胺及其改性材料自然老化行为研究及预测

在自然环境(武汉)下进行了两年半的老化曝晒实验,随着老化时间的增长,聚酰胺材料的吸水率逐渐增加,力学性能下降,表面出现了不同程度的裂纹.通过吸水率测试和力学性能的比较,发现环境湿度影响聚酰胺老化过程中力学性能变化,湿度越大,材料力学性能下降越快;改性后,即添加了玻璃纤维后的聚酰胺,能够在一定程度下减缓材料老化行为.对材...     

浅谈袋式除尘器废旧滤袋的处置

袋式除尘器是目前世界上应用最多、最为成熟的除尘设备。由于其除尘效率高、结构简单、适应性强、工作稳定、可回收干料等特点已广泛应用到各行各业中。而随着袋式除尘器的广泛应用,大量破损的废旧滤袋的处置也成为难以解决的棘手问题。本文分析了国内滤袋市场现状以及废旧滤袋难以有效处置的原因。     

燃煤锅炉机组电改袋工程成功案例分析

以宝钢电厂3#机组电改全袋工程为例，论述了该成功工程的特点，介绍了袋式除尘器及滤料的比选过程、结构型式和设计参数，总结了除尘系统所具有的技术特色和投运后所取得的效果，该案例对袋式除尘器在电站锅炉的推广应用具有参考意义。     

Phosphorus removal with by-products in a flow-through setting

Phosphorus (P) losses to surface waters can result in eutrophication. Some industrial by-products have a strong affinity for dissolved P and may be useful in reducing nonpoint P pollution with landscape-scale runoff filters. Although appreciable research has been conducted on characterizing P sorption by industrial by-products via batch isotherms, less data are available on P sorption by these materials in a flow-through context integral to a landscape P filter. The objectives of this study were to evaluate several industrial by-products for P sorption in a flow-through setting, to determine material chemical properties that have the greatest impact on P sorption in a flow-through setting, and to explore how retention time (RT) and P concentration affect P removal. Twelve materials were characterized for chemical properties that typically influence P removal and subjected to flow-through P sorption experiments in which five different RTs and P concentrations were tested. The impact of RT and P concentrations on P removal varied based on material chemical properties, mainly as a function of oxalate-extractable aluminum (Al), iron (Fe), and water-soluble (WS) calcium (Ca). Statistical analysis showed that materials elevated in oxalate-extractable Al and Fe and WS Ca and that were highly buffered above pH 6 were able to remove the most P under flow-through conditions. Langmuir sorption maximum values from batch isotherms were poorly correlated with and overestimated P removal found under flow-through conditions. Within the conditions tested in this study, increases in RT and inflow P concentrations increased P removal among materials most likely to remove P via precipitation, whereas RT had little effect on materials likely to remove P via ligand exchange.