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首页> 外文会议>22nd Annual Semiconductor Pure Water and Chemicals Conference Feb 17-19, 2003 Santa Clara, CA >Performance Characteristics of Membrane Pre-filters
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Performance Characteristics of Membrane Pre-filters

机译：膜预滤器的性能特征

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摘要

There are many options when selecting a membrane pre-filter for an ultra pure water system. Particle removal efficiency, dirt holding capacity and filter cost are the typical factors used to determine the best prefilter for an application. The more efficient a membrane prefilter is in removing particles and the smaller the particles that are removed from the feed stream, the less membrane regeneration will be required. The trade-off with prefilter efficiency is usually in its ability to hold dirt effectively within its structure before cake formation or pore blocking causes a significant increase in pressure drop and a filter changeout is needed. The total filtration cost is more than the cost of the elements. Typical filtration cost analysis focuses on the filter element cost, changeout frequency, down time and disposal costs. The total filtration cost includes the typical filter cost as well as, regeneration labor, chemicals and frequency and the membrane element replacement cost. This paper will evaluate the efficiency, dirt holding capacity and total filtration cost of different types of membrane pre-filters. Standard membrane prefilters will be evaluated and compared to new non-woven composite filters with the dirt holding capacity of a depth filtration media and the efficiency of a surface filter.
机译：为超纯水系统选择膜预过滤器时，有很多选择。颗粒去除效率，污物吸收能力和过滤器成本是确定应用最佳预过滤器的典型因素。膜预过滤器去除颗粒的效率越高，从进料流中去除的颗粒越小，所需的膜再生越少。预过滤器效率的权衡通常在于其在滤饼形成或孔阻塞导致压降显着增加并需要更换过滤器之前将污垢有效地保持在其结构内的能力。总过滤成本超过元件成本。典型的过滤成本分析着重于滤芯成本，更换频率，停机时间和处理成本。总过滤成本包括典型的过滤器成本以及再生人工，化学药品和频率以及膜元件更换成本。本文将评估不同类型的膜预过滤器的效率，容尘量和总过滤成本。将对标准的膜预过滤器进行评估，并将其与新型非织造复合过滤器进行比较，该过滤器具有深度过滤介质的防污能力和表面过滤器的效率。

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