GOALI: Effect of Fiber Orientation on Filter Media Performance

abstractcts - 0310429 g。过滤是许多工业过程中的重要操作。过滤介质控制着性能和分离效率。制造商被限制在只有几个参数来操纵设计具有期望性能的介质。由于纤维的三维结构难以表征和控制，在无纺布材料的设计中很少考虑纤维的三维结构。我们将开发一种在施工过程中使用电场来控制过滤介质三维结构的方法，并利用我们在过滤方面的专业知识来评估过滤介质的性能。这项工作建立在先前和当前的工作基础上，成功的可能性很大。在先前的NSF项目中，开发了一种方法来测量相对于z轴（垂直于滤片平面的轴）的平均纤维角度和角度分布。在之前的工作中测试的玻璃纤维滤料受到形成方法的限制，其平均角度在45到90度之间。液体过滤实验表明，纤维夹角对过滤性能有显著影响，夹角越小的介质渗透性越好。在目前正在进行的一项工作中，通过实验测试了过滤介质在压缩空气中聚结和去除亚微米油滴的有效性。实验数据表明，在45 ~ 90度范围内，接近45度的介质角比较大角度的介质效果更好。在这个提议的工作中要构建的介质将光纤角度范围扩展到0到45度范围。这些介质将在液体过滤和气相聚结实验中进行测试，以将性能与纤维角度在0到45度范围内的关系联系起来，这是以前没有测试过的。这种相关性将为制造商提供预测过滤器性能的手段，以优化压降和捕获效率等参数。初步实验表明，玻璃纤维，典型的那些用于无纺布介质，是强取向的电场。在这个提议的工作中，片材成形器将由电极构成，在片材形成时产生电场，使纤维定向。将制作一组介质样品，在相对于z轴的0到45度范围内测量平均纤维角度的变化。这个提议是一个GOALI提议。该项目更广泛的影响包括培训粒子技术的学生工程师，并与派克汉尼汾公司建立强有力的合作关系，以加强工艺开发和促进技术转让。阿克伦大学的六家过滤器公司组成的联合研究联盟，以及阿克伦大学、密歇根州立大学和塔尔萨大学在多相传输现象联合研究和课程开发方面的合作伙伴关系，为这项技术提供了更多的渠道。作为该项目的一部分，派克汉尼汾公司的联合首席工程师将作为该项目的工业顾问每年两次访问阿克伦大学，为本科生举办研讨会，并与学生进行问答会议。学生和教师每年将访问帕克汉尼汾，在帕克位于密歇根州牛津市的工厂进行实验。结果也将被链接到AICHE粒子技术论坛的粒子技术教育资源网站（ERPT）。

AbstractCTS-0310429G. Chase, University of AkronFiltration is an important operation in many industrial processes. The filter medium controls the performance and separation efficiency. Manufacturers are limited to only a few parameters to manipulate to design a medium with a desired performance. The three-dimensional fiber structure is seldom considered in design of non-woven media because difficulty in characterization and control. We will develop a method using an electrical field to control the three-dimensional structure of the filter media during construction and use our expertise in filtration to evaluate the filter media performance. This work builds upon prior and current work and has a high probability of success. In a prior NSF project a method was developed to measure the average fiber angle and angle distribution relative to the z-axis (the axis perpendicular to the plane of the filter sheet). The glass fiber filter media tested in the prior work were limited by the formation method to average angles in the range of 45 to 90 degrees. Liquid filtration experiments show that the filter performance is significantly affected by the fiber angle and that media with smaller angles have improved permeabilities. In a current work in progress, filter media are experimentally tested for effectiveness in coalescence and removal of submicron oil drops from pressurized air. Experimental data from this work show that media angles closer to 45 degrees in the 45 to 90 degree range perform better than media with larger angles. The media to be constructed in this proposed work will extend the fiber angle range to the 0 to 45 degree range. These media will be tested in the liquid filtration and gas phase coalescence experiments to correlate the performance to the fiber angles in the 0 to 45 degree range that has not been tested previously. Such correlations will provide manufacturers the means to predict filter performance to optimize parameters such as pressure drop and capture efficiency. Preliminary experiments show that glass fibers, typical of those used in non-woven media, are strongly oriented by electrical fields. In this proposed work sheet formers will be constructed with electrodes to generate electric fields that orient the fibers while the sheets are formed. A set of media samples will be made with a variation of average fiber angles in the 0 to 45 degree range as measured relative to the z-axis. This proposal is a GOALI proposal. The broader impacts of this project include training of student engineers in particle technology and establishing a strong collaboration with the Parker Hannifin Corporation to enhance process development and to promote technology transfer. Additional outlets for this technology are provided through the Coalescence Research Consortium of six filter companies, at the University of Akron, and a partnership in Combined Research and Curriculum Development on multiphase transport phenomena between the University of Akron, Michigan State University, and University of Tulsa. As part of this project the co-PI engineer from Parker Hannifin will visit the University of Akron twice per year as an industrial advisor on the project, to give seminars to undergraduate classes, and to conduct question and answer sessions with students. The students and faculty will visit Parker Hannifin each year to conduct experiments at Parker's Oxford, Michigan facility. The results will also be linked to the AICHE Particle Technology Forums website for Educational Resources for Particle Technology (ERPT).