我国用于袋式除尘器的过滤材料

针对我国大气污染物的排放特点,袋式除尘是比较合适、运行稳定可靠的一项烟气除尘技术。介绍了过滤材料的分类、袋式除尘过滤材料的结构以及应用于高温腐蚀性烟气过滤中过滤材料的几种纤维性能,重点介绍了高性能PTFE纤维在过滤材料中的应用。     

高温过滤材料的现状及发展

由于袋式除尘器在高温过滤中的普遍应用,耐高温过滤材料越来越受到关注。主要针对袋式除尘器的核心——高温过滤材料中聚四氟乙烯、芳纶、聚苯硫醚、聚酰亚胺和玻璃纤维这五种新型高性能高温过滤材料的性能、发展和应用做简单介绍,并对国内外部分生产公司和厂家及其品牌和产品做简单的对比介绍,最后对高温过滤材料的发展趋势做一个展望。     

我国的袋式除尘器和耐高温过滤材料

用翔实的数据说明了用于重污染或高能耗行业(如钢铁、水泥、燃煤发电行业)的袋式除尘器和耐高温过滤材料的优良性能,用于袋式除尘的耐高温过滤材料在高温烟气的处理领域具有广阔的前景。     

熔体过滤器在纺粘法非织造布生产线中的应用

不同类型的熔体过滤器有不同的结构和功能。文章介绍了国内纺粘法非织造布生产线中主要应用的三类熔体过滤器和过滤器中使用的不同过滤材料的特性指标 ,指出过滤器类型和过滤材料的选择与纺粘法非织造布的生产关系紧密     

耐高温针刺过滤材料性能的研究

对PTFE、PPS和P84三种耐高温针刺过滤材料进行了物理性能和过滤性能测试;研究了在类似的工艺条件下三种过滤材料的过滤性能,并与国家标准的技术要求进行对照,分析三种过滤材料的优缺点及适用的工况条件,为袋式除尘器过滤材料的选用提供依据。     

开发“垃圾焚烧净化装置用滤材及配套净化过滤系统工程”的建议

本文详细叙述了目前国内外垃圾焚烧的状况及净化集尘装置，重点介绍了国外“滤吸”新工艺，用具有“滤吸”功能的纸质滤材袋式过滤器来代替棉、纤两大类纤维织物袋式过滤器，并以发达国家为例指出零排放是净化过滤工程的奋斗目标。     

汽车空凋过滤器及其最新进展

介绍了汽车空调过滤器的发展、应用现状及最新进展,分析了汽车空调过滤器的结构特点和过滤材料的种类及其应用现状。     

汽车空调过滤器及其最新进展

介绍了汽车空调过滤器的发展、应用现状及最新进展,分析了汽车空调过滤器的结构特点和过滤材料的种类及其应用现状。     

驻极体袋式过滤器防治煤灰纱的实际应用

通过在细纱车间利用驻极体袋式过滤器对环境空气中的微细颗粒物（PM2.5）进行过滤,有效地防治了“煤灰纱”。     

袋式除尘用过滤材料的开发及应用

详细阐明了袋式除尘器的除尘机理,简要介绍了袋式除尘器常用纤维的特点和过滤性能,阐述了袋式除尘器的加工方法及其后处理方法,并简述了袋式除尘器过滤材料的相关应用,指出过滤材料与国外相比还存在很大的差距,需利用我国的优势来降低成本.     

应用于高温气体过滤的Basofil过滤材料

总结了Basofil滤料的物理性能、过滤效率的研究及其特性。除尘室现场试验结果表明 ,与 10 0 %间位芳纶滤料相比 ,Basofil滤料具有更低的压力降和更高透气性的优点 ,且具有相近或更长的使用寿命     

聚丙烯滤材对某些烟气成分过滤特性的研究

经过对聚丙烯(PP)丝束和醋酸纤维(CA)滤嘴对卷烟总粒相物,水分、烟碱、一氧化碳、氢氰酸和酚类物质过滤效率的测定,认为两种滤嘴对总粒相物和二元酚的过滤效率基本相同.对一氧化碳和氢氰酸释放量的影响不大;PP滤嘴对烟碱和过滤效率比CA滤嘴高,一元酚的过滤效率低于CA滤嘴;三醋酸甘油酯的加入,提高了PP滤嘴对一元酚的过滤效率。      

Mercury oxidation in flue gas using gold and palladium catalysts on fabric filters

The feasibility of oxidizing elemental mercury in coal combustion flue gas using catalytic material impregnated onto fabric filters was explored. TiO2, Au/TiO2, and Pd/Al2O3 were studied based on promising results in previous research. Several fabric coating methods were investigated to determine the best way to load a filter. A spray coat method was found to have the highest initial loading and had the lowest losses after simulated pulse-jet cleaning. The oxidation performance of the catalyst-coated filters was tested using a simulated flue gas in a bench-scale reactor under conditions similar to those found in a baghouse. Au/TiO2 and Pd/Al2O3 were effective, yielding mercury oxidation ranges of 40-60% and 50-80%, respectively. A 19 kW research combustor equipped with a baghouse was used to fire a range of coals and further test the performance of Pd/Al2O3. Results obtained warrant further development of this technique as a means of mercury pollution control.     

不同填充密度的梯度结构复合滤材的制备及其性能

为使滤料在同等过滤效率下具有较低的过滤阻力,以聚丙烯（PP）为原料,用熔体静电纺丝技术在线制备了纤维填充密度梯度复合滤料。研究了不同收卷速度下制备的复合滤料的过滤效率,发现复合滤材的过滤效率随收卷速度的增加而降低;选择3种收卷速度制备出3种同等厚度的纤维网,并计算其对应的纤维填充密度;最后在聚丙烯纺粘非织造基材上直接沉积3层不同填充密度的纤维网,经热压制备梯度复合滤料,结果表明,在同等过滤效率下,纤维填充密度不同的梯度结构复合滤料具有低阻特性,对粒径大于等于2.0 μm颗粒的过滤效率最高达87.0%,过率阻力为8.0 Pa,透气率为187.0 mm/s。     

静电纺聚丙烯腈纳米纤维复合滤材的制备及其气液过滤性能

为探究纳米纤维物性参数对复合滤材气液过滤性能的影响,利用静电纺丝方法在普通玻璃纤维滤材上制备了聚丙烯腈(PAN)纳米纤维层,以3层堆叠方式得到不同纳米纤维层面密度和纤维直径的复合滤材。在相同实验操作条件下,以癸二酸二辛酯(DEHS)为实验介质,通过滤材气液过滤性能实验装置分析了不同复合滤材的过滤效率、压降和品质因子。结果表明：复合滤材的稳态过滤效率和压降均随着纳米纤维层面密度的增大而增加,但稳态品质因子呈现先增加后降低的趋势,且在面密度为0.4 g/m2时达到最大值;在面密度相等的条件下,纳米纤维直径由706.5 nm降低到520.1 nm,滤材的稳态过滤效率和品质因子均随着纳米纤维直径降低而逐渐增加,表明在复合滤材中宜选用纤维直径较小的纳米纤维层。     

Centenary Review Article Beer Filtration

Beer filtration has been effected by sheet filters and various systems utilising filter aids for many decades. Cartridge filters, frequently utilising man-made polymeric media, are taking over the role of the sheet filter. While filter aid systems will be in use for some years, their long-term place in the Brewing Industry is being challenged by new developments in regenerable media depth filters and cross-flow microfilters. The advent of electronic particle size measurement has given detailed information on the physical character of beer particles and filter-aid particles. This enables accurate interpretation of filtration processes and the impact of materials such as β-glucans on the processes using the laws of filtration.     

Quantification of the filterability of freshwater bacteria through 0.45, 0.22, and 0.1 microm pore size filters and shape-dependent enrichment of filterable bacterial communities

Micro-filtration is a standard process for sterilization in scientific research, medical, and industrial applications, and to remove particles in drinking water or wastewater treatment. It is generally assumed, and confirmed by quantifying filtration efficiency by plating, that filters with a 0.1-0.45 microm pore size can retain bacteria. In contrast to this assumption, we have regularly observed the passage of a significant fraction of natural freshwater bacterial communities through 0.45, 0.22, and 0.1 microm pore size filters. Flow cytometry and a regrowth assay were applied in the present study to quantify and cultivate filterable bacteria. Here we show for the first time a systematic quantification of their filterability, especially their ability to pass through 0.1 microm pore size filters. The filtered bacteria were subsequently able to grow on natural assimilable organic carbon (AOC) with specific growth rates up to 0.47 h(-1). We were able to enrich bacteria communities that pass preferentially through all three pore size filters at significantly increased percentages using successive filtration-regrowth cycles. In all instances, the dominant microbial populations comprised slender spirillum-shaped Hylemonella gracilis strains, suggesting shape-dependent selection during the filtration process. This quantification of the omnipresence of microfilterable bacterial in natural freshwater and their regrowth characteristics demand a change in the sterile filtration practice used in industrial and engineering applications as well as scientific research.     

浸渍整理芳纶/PAN预氧化纤维滤料性能

以PTFE乳液和水性环氧树脂为整理液主要材料,对芳纶/PAN预氧化纤维滤料进行浸渍整理以改善滤料过滤性能.采用扫描电子显微镜对滤料进行形貌观察,并对滤料进行了拉伸性能、透气性、孔径尺寸和过滤性能测试.结果 表明:浸渍整理后滤料中的纤维及纤维孔隙间形成树脂附着物,使滤料透气性和孔径减小,最小孔径、最大孔径和平均孔径分别减...     

Antimicrobial effect of silver particles on bacterial contamination of activated carbon fibers

Even though activated carbon fiber (ACF) filters have been widely used in air cleaning for the removal of hazardous gaseous pollutants, because of their extended surface area and high adsorption capacity, bacteria may breed on the ACF filters as a result of their good biocompatibility; ACF filters can themselves become a source of bioaerosols. In this study, silver particles were coated onto an ACF filter, using an electroless deposition method and their efficacy for bioaerosol removal was tested. First, various surface analyses, including scanning electron microscopy, inductively coupled plasma and X-ray diffraction were carried out to characterize the prepared ACF filters. Filtration and antimicrobial tests were then performed on the filters. The results showed that the silver-deposited ACF filters were effective for the removal of bioaerosols by inhibition of the survival of microorganisms, whereas pristine ACF filters were not. Two bacteria, Bacillus subtilis and Escherichia coli, were completely inhibited within 10 and 60 min, respectively. Electroless silver deposition did not influence the physical characteristics of ACF filters such as pressure drop and filtration efficiency. The gas adsorptive ability of the silver-deposited ACF filter, as represented by the micropore specific surface area, decreased by about 20% compared to the pristine filter because of the blockage of the ACF micropores by silver particles. Therefore, the amount of silver particles on the ACF filters needs to be optimized to avoid excessive reduction of their adsorptive characteristics and to show effective antimicrobial activity.     

Textiles in air filtration

Fossil fuels are a major source of energy although they generate toxic pollutants that cause harm to human beings and the environment. To control these toxic pollutants, various environmental regulations have been imposed and improved filtration technologies have been developed and adopted in response. Multinational agreements have been signed in order to tackle fossil fuel emission as a global problem. Whilst efforts to reduce emissions include the switch from fossil fuel to renewables such as solar, rain and wind, renewables like solar and wind sources and technologies are currently expensive as compared to fossil-fuel technologies. Nonwoven filter media are currently the dominant means by which the fly ash particles that are generated during fossil-fuel combustion are removed; they are widely used because of their high filtration efficiency and low pressure-drop properties. This issue of Textile Progress focuses on the filtration market, the manufacturing techniques used for nonwoven filters, the filtration of fly ash and the mechanisms used to control emissions to meet environmental regulations. Important properties of filter fabrics, their areas of application and disposal issues are discussed and possible reasons are presented for the failure of filters during operation. It addresses the problems faced in achieving effective filtration, not only in fossil fuel power plants but also across a number of other important industries.